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Schneider C, El-Koubani O, Intzepogazoglou D, Atkinson S, Menon K, Patel AG, Ross P, Srirajaskanthan R, Prachalias AA, Srinivasan P. Evaluation of treatment delays in hepatopancreatico-biliary surgery during the first COVID-19 wave. Ann R Coll Surg Engl 2023; 105:S12-S17. [PMID: 35175785 PMCID: PMC10390244 DOI: 10.1308/rcsann.2021.0317] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023] Open
Abstract
INTRODUCTION The COVID-19 pandemic has caused oncological services worldwide to face unprecedented challenges resulting in treatment disruption for surgical patients. Hepatopancreatico-biliary (HPB) cancers are characterised by rapid disease progression. This study aims to assess delays in receiving surgery for this patient cohort during the first COVID-19 wave. METHODS Patients undergoing surgery between April and July 2020 (COVID-19 period) were compared with a control group from the preceding year. Delay in receiving surgery was defined as more than 50 days between referral and surgery date. Statistical analysis was carried out to evaluate predictors of delay and short-term outcomes. RESULTS During the COVID-19 and pre-COVID-19 periods, 94 and 115 patients underwent surgery, respectively. No patients contracted COVID-19 postoperatively. Some 118 patients waited more than 50 days for surgery versus 91 who received surgery within 50 days from referral. Independent predictors for surgical delay were undergoing surgery in the COVID-19 era (odds ratio (OR) 2.2, 95% confidence interval (CI) 1.2-4.1; p=0.015), referral pathway (OR 35.1, 95% CI 4.2-296; p=0.001) and presenting pathology (OR 8.3, 95% CI 1.2-56.1; p=0.03). Short-term outcomes were comparable between groups. CONCLUSIONS Patient referral pathway and presenting pathology may contribute to delays in undergoing HPB cancer surgery during COVID-19 outbreaks. It is hoped that a better understanding of these factors will aid in designing shifts in healthcare policy during future pandemic outbreaks.
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Affiliation(s)
- C Schneider
- King's College Hospital NHS Foundation Trust, UK
| | - O El-Koubani
- King's College Hospital NHS Foundation Trust, UK
| | | | - S Atkinson
- King's College Hospital NHS Foundation Trust, UK
| | - K Menon
- King's College Hospital NHS Foundation Trust, UK
| | - A G Patel
- King's College Hospital NHS Foundation Trust, UK
| | - P Ross
- King's College Hospital NHS Foundation Trust, UK
| | | | | | - P Srinivasan
- King's College Hospital NHS Foundation Trust, UK
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Parakkal Kurian L, Rentala S, Belsiyal CX, Srinivasan P, Govindar Thimmajja S. Aggressive behavior and its associated factors among persons with mental illness: An observational study. J Educ Health Promot 2023; 12:249. [PMID: 37727413 PMCID: PMC10506767 DOI: 10.4103/jehp.jehp_195_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 03/17/2023] [Indexed: 09/21/2023]
Abstract
BACKGROUND Aggressive behavior of psychiatric inpatients causes severe complications during treatment; nursing staff needs to understand the factors associated with aggression in inpatient units to prevent aggression. AIM This study aimed to examine the level of aggression and its associated factors. MATERIALS AND METHODS A descriptive observational design was conducted among aggressive patients. An aggressive behavior event was observed during the aggression episode. Data were collected from 55 patients with aggressive behavior using the Staff Observation Aggression Scale-Revised (SOAS-R) and Brief Psychiatric Rating Scale (BPRS). Patient-, staff-, and ward-related factors were assessed using a structured questionnaire. RESULTS About 69% of patients had a severe level of aggressive behavior. There was a significant association between gender, the severity of symptoms, staff-to-patient ratio, ward milieu, and the number of caregivers with levels of aggression. CONCLUSION The majority of the persons with mental illness exhibited severe aggression in a psychiatric setting. Being male, the presence of psychotic symptoms, ward milieu, staff-to-patient ratio, and availability of caregivers were significantly associated with aggression. This study adds to the existing literature by focusing on managing ward-related factors (avoiding noise and overcrowding) to prevent aggressive behavior among mentally ill patients.
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Affiliation(s)
| | - Sreevani Rentala
- Department of Nursing, Dharwad Institute of Mental Health and Neurosciences, Dharwad, Karnataka, India
| | - C Xavier Belsiyal
- Department of Psychiatric Nursing, College of Nursing, All India Institute of Medical Sciences, Rishikesh, Uttarakhand, India
| | - P Srinivasan
- Department of Psychiatric Nursing, College of Nursing, All India Institute of Medical Sciences, Mangalagiri, Andhra Pradesh, India
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Srinivasan P, Rentala S, Kumar P. Self-esteem among heinous and non-heinous male delinquent adolescents- A descriptive comparative study from East India. Ind Psychiatry J 2023; 32:273-281. [PMID: 38161479 PMCID: PMC10756630 DOI: 10.4103/ipj.ipj_152_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/12/2022] [Accepted: 01/24/2023] [Indexed: 01/03/2024] Open
Abstract
Background Adolescence is the most complex stage of development that causes the greatest difficulties in their life because of frequent physical and emotional issues including deviated character and behavioral disorders. Aim This descriptive comparative study was intended to compare self-esteem between heinous and non-heinous male delinquent adolescents residing in observation homes. Materials and Methods A quantitative research approach with a non-experimental descriptive comparative design was adopted. One hundred and seventy-nine male delinquent adolescents (Heinous = 74, Non-Heinous = 105) residing in two observation homes were selected by convenience sampling technique based on the type of crime committed. The standardized Rosenberg's self-esteem scale was used to collect the data. Results We analyzed the data with Chi-square for homogeneity of sample characteristics, an independent t test for comparison of self-esteem between groups, an independent t test, one-way ANOVA for the association, and stepwise regression for predictors. There was a statistically significant difference in self-esteem between groups, a significant association of self-esteem with age and duration of stay in the heinous group and with the father's education in the non-heinous group, and the father's education, mother's occupation, substance use, and order of birth had predicted the self-esteem in non-heinous group. Conclusion The study concluded that self-esteem significantly varied between heinous and non-heinous group delinquents. This study is the first of its kind and provided initial evidence by filling the gap in the literature to understand the difference in the level of self-esteem among delinquent adolescents according to the type of crime committed.
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Affiliation(s)
- P Srinivasan
- Department of Psychiatric Nursing, College of Nursing, All India Institute of Medical Sciences, Patna, Bihar, India
| | - Sreevani Rentala
- Department of Nursing, Dharwad Institute of Mental Health and Neurosciences, Dharwad, Karnataka, India
| | - Pragya Kumar
- Department of Community and Family Medicine, All India Institute of Medical Sciences, Patna, Bihar, India
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Schneider C, Bogatu D, Leahy J, Zen Y, Ross P, Sarker D, Suddle A, Agarwal K, Srinivasan P, Prachalias AA, Heaton N, Menon K. Predictors of recurrence following laparoscopic minor hepatectomy for hepatocellular carcinoma in the UK. Surg Oncol 2023; 49:101965. [PMID: 37348195 DOI: 10.1016/j.suronc.2023.101965] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 05/10/2023] [Accepted: 06/07/2023] [Indexed: 06/24/2023]
Abstract
AIMS Minor hepatectomy, which is increasingly carried out laparoscopically (LLR), is a cornerstone of curative treatment for hepatocellular carcinoma (HCC). The majority of relevant publications however originate from regions with endemic viral hepatitis. Although the incidence of HCC in the UK is increasing, little is known about outcomes following LLR. METHODS Consecutive patients undergoing minor (involving ≤2 segments) LLR or open resection (OLR) at our institute between 2014 and 2021 were compared. Selection from a plethora of factors potentially impacting on overall (OS) and disease free survival (DFS) was optimised with Lasso regression. To enable analysis of patients having repeat resection, multivariate frailty modelling was utilised to calculate hazard ratios (HR). RESULTS The analysis of 111 liver resections included 55 LLR and 56 OLR. LLR was associated with a shorter hospital stay (5 ± 2 vs. 7 ± 2 days; p < 0.001) and a lower comprehensive complication index (4.43 vs. 9.96; p = 0.006). Mean OS (52.3 ± 2.3 vs. 49.9 ± 3.0 months) and DFS (33.9 ± 3.4 vs. 36.5 ± 3.6 months; p = 0.59) were comparable between LLR and OLR, respectively (median not reached). Presence of mixed cholangiocarcinoma/HCC, satellite lesions and AFP level predicted OS and DFS. In addition tumour size was predictive of DFS. CONCLUSIONS In the studied population minor LLR was associated with shorter hospital stay and fewer complications while offering non-inferior long-term outcomes. A number of predictors for disease free survival have been elucidated that may aid in identifying patients with a high risk of disease recurrence and need for further treatment.
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Affiliation(s)
- C Schneider
- Department of Hepatopancreatico-biliary Surgery, King's College Hospital, London, United Kingdom
| | - D Bogatu
- Department of Hepatopancreatico-biliary Surgery, King's College Hospital, London, United Kingdom
| | - J Leahy
- Department of Hepatopancreatico-biliary Surgery, King's College Hospital, London, United Kingdom
| | - Y Zen
- Institute of Liver Studies, King's College Hospital, London, United Kingdom
| | - P Ross
- Department of Oncology, Guy's and St Thomas' NHS Foundation Trust, United Kingdom
| | - D Sarker
- Department of Oncology, Guy's and St Thomas' NHS Foundation Trust, United Kingdom
| | - A Suddle
- Institute of Liver Studies, King's College Hospital, London, United Kingdom
| | - K Agarwal
- Institute of Liver Studies, King's College Hospital, London, United Kingdom
| | - P Srinivasan
- Department of Hepatopancreatico-biliary Surgery, King's College Hospital, London, United Kingdom
| | - A A Prachalias
- Department of Hepatopancreatico-biliary Surgery, King's College Hospital, London, United Kingdom
| | - N Heaton
- Department of Hepatopancreatico-biliary Surgery, King's College Hospital, London, United Kingdom
| | - K Menon
- Department of Hepatopancreatico-biliary Surgery, King's College Hospital, London, United Kingdom.
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Vishali S, Poonguzhali E, Banerjee I, George SS, Srinivasan P. Purification of domestic laundry wastewater in an integrated treatment system consists of coagulation and ultrafiltration membrane process. Chemosphere 2023; 314:137662. [PMID: 36586447 DOI: 10.1016/j.chemosphere.2022.137662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/07/2022] [Accepted: 12/24/2022] [Indexed: 06/17/2023]
Abstract
An integrated unit to purify and reuse domestic laundry wastewater consisting of coagulation, sand filtration, carbon adsorption, and ultrafiltration process is developed. Chitosan and Ameztreat 102 polyamine were used as coagulants and their treatability was measured by color, turbidity and concentration of Linear Alkylbenzene Sulphonates (LAS) at various operation conditions. As a result of the trial studies, the maximum removal efficiency was attained as (i) for Chitosan- 98.2% color, 99.3% turbidity, 100% LAS removal efficiency; (ii) for Polyamine-88% color, 99% turbidity, 100% LAS. The transport mechanism of the pollutant towards the coagulant was described using kinetic models. The thickener area calculated is 0.2436 m2 for the flow rate of 100 L/h by Kynch theory. The results were recommended that the laundry wastewater be efficiently treated in the proposed treatment train and could be reused effectively.
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Affiliation(s)
- S Vishali
- Department of Chemical Engineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603 203, India.
| | - E Poonguzhali
- Department of Chemical Engineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603 203, India
| | - Indhurekha Banerjee
- Department of Chemical Engineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603 203, India
| | - Sharan Sakshi George
- Department of Chemical Engineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603 203, India
| | - P Srinivasan
- PG and Research Department of Biotechnology, PGP College of Arts and Acience, Namakkal, 637 207, India
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Jothi basker N, Dhivya KS, Karthika K, Srinivasan P, Anandbabu G. First time observation on Magnetic behavior of Pure and Doped TungstenOxide WO 3 nanoparticles for magnetic applications. Int J Nanosci 2022. [DOI: 10.1142/s0219581x22500557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Srinivasan P, Rentala S, Kumar P. Effectiveness of aggression management training (AMT) on self‐esteem, impulsivity, and aggressive behavior among adolescents residing in delinquent homes—A feasibility study from east India. Child Adoles Psych Nursing 2022; 36:134-144. [PMID: 36344451 DOI: 10.1111/jcap.12400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 08/08/2022] [Accepted: 10/25/2022] [Indexed: 11/09/2022]
Abstract
PURPOSE This feasibility study examined the aggression management training (AMT) interventions on self-esteem, impulsivity, and aggressive behavior among adolescents residing in delinquent or observation homes. METHODS A quantitative research approach with the quasi-experimental nonequivalent control group (comparison) pretest and Posttest design was adopted. A total of 32 male adolescents (16 each in experimental and comparison groups) residing in two different observation homes in the state of Bihar, India were selected by convenience sampling technique. The study evaluated the following outcome measures: self-esteem, impulsivity, and aggressive behavior for both groups at baseline and 1 month. AMT was administered to the experimental group bi-weekly for 4 weeks covering four components in 8 sessions. RESULTS We analysed the data with independent and paired t-tests for between and within the group differences, and Pearson correlation for a relationship. AMT intervention improved self-esteem and reduced aggressive behavior and impulsivity among adolescents residing in delinquent homes. A correlation was found between aggression and impulsivity, and between self-esteem and impulsivity. PSYCHIATRIC NURSING IMPLICATIONS The study had provided initial evidence for practice that can help psychiatric nurses significantly implement these types of interventions among significant, vulnerable, and ignored groups of adolescents detained in observation homes to prevent the occurrence of repeat offenses.
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Affiliation(s)
- P. Srinivasan
- Department of Mental Health Nursing College of Nursing, All India Institute of Medical Sciences Patna Bihar India
| | - Sreevani Rentala
- Department of Nursing Dharwad Institute of Mental Health and Neurosciences Dharwad Karnataka India
| | - Pragya Kumar
- Department of Community & Family Medicine All India Institute of Medical Sciences Patna Bihar India
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Nair R, Mohan K, Jayakrishnan K, Srinivasan P, Javeth A, Sharma S, Kumari B. Lived Experience of Nurses in COVID-19 Units - A Phenomenological Study from Eastern India. J Caring Sci 2022; 11:197-209. [DOI: 10.34172/jcs.2022.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 08/04/2022] [Indexed: 11/06/2022] Open
Abstract
Introduction: Nurses are the frontline workers who had to play multiple functions like in acute care, community, etc. but, it was stated that COVID-19 has caused immense trauma to nurses globally. Methods: A descriptive phenomenological study to explore the lived experience of nurses working in COVID-19 units was conducted among nine senior nursing officers recruited by purposive homogenous sampling and interviewed with an open-ended interview guide by ensuring data saturation. COREQ guideline were adopted for this qualitative study. Results: Qualitative data were analysed using Giorgi’s framework, and themes and sub-themes were derived. The major themes that emerged in the present study were "Reactions and preparation", "Feelings and satisfaction in active duty", "Role of a helping hand", "Working experience in PPE", and "Pandemic and socialization". Each theme had further sub-themes to classify the verbatims. Conclusion: Most of the nurses had anxiety and prepared themselves to play with fire, had unrealistic hope, and mixed emotions, kept their family away and intentionally concealed information to reduce family’s fear, were satisfied with training and preparation, and had unpleasant experiences with PPE, had to restrict their social activities and felt social stigma. It also concludes with the recommendation that warrants the need to improve their professional quality of life and working conditions by safeguarding nurses’ physical and mental health.
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Affiliation(s)
- Rathish Nair
- College of Nursing, All India Institute of Medical Sciences, Patna, Bihar, India
| | - Keerthi Mohan
- College of Nursing, All India Institute of Medical Sciences, Patna, Bihar, India
| | - K Jayakrishnan
- College of Nursing, All India Institute of Medical Sciences, Patna, Bihar, India
| | - P Srinivasan
- College of Nursing, All India Institute of Medical Sciences, Patna, Bihar, India
| | - Athar Javeth
- College of Nursing, All India Institute of Medical Sciences, Patna, Bihar, India
| | - Sadhana Sharma
- Department of Biochemistry, All India Institute of Medical Sciences, Patna, Bihar, India
| | - Bandana Kumari
- Department of Biochemistry, All India Institute of Medical Sciences, Patna, Bihar, India
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Karikalan S, Murugan R, Thangavelu A, Srinivasan P, Sivakumar P. Mandibular-osteomyocutaneous flap aided extirpation of large intraosseous lesions - A modified approach. Advances in Oral and Maxillofacial Surgery 2022. [DOI: 10.1016/j.adoms.2022.100341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
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Satti SK, Devi KS, Dhar P, Srinivasan P. Detecting potholes on Indian roads using Haar feature-based cascade classifier, convolutional neural network, and instance segmentation. Soft comput 2022. [DOI: 10.1007/s00500-022-07265-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Anbalagan C, Srinivasan P, Sundaram RM, Vennila R. Mesenchymal Stem/Stromal Cells: ROLE OF NUTRIENT DEPRIVATION-INDUCED CELLULAR STRESS IN INFLUENCING THE SECRETOME OF MESENCHYMAL STROMAL CELLS: CONSEQUENCES FOR CELL-FREE THERAPEUTICS. Cytotherapy 2022. [DOI: 10.1016/s1465-3249(22)00231-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Govindammal M, Kannan S, Srinivasan P, Prasath M. Quantum chemical calculations, spectroscopic studies and molecular docking investigations of the anti-cancer drug quercitrin with B-RAF inhibitor. Heliyon 2022; 8:e09539. [PMID: 35663763 PMCID: PMC9160043 DOI: 10.1016/j.heliyon.2022.e09539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 12/23/2021] [Accepted: 05/19/2022] [Indexed: 11/27/2022] Open
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13
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Srinivasan P, Kannagi A, Rajendiran P. Laplace Angular Displaced Secure Data Transmission for Internet of Things Based Health Care Systems. j med imaging hlth inform 2021. [DOI: 10.1166/jmihi.2021.3883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The Internet of Things (IoT) has changed the world into a more physically connected, ensuring higher order applications. As smart devices and patients surrounding are able to freely communicate with each other, more chances and conveniences are brought to us. However, as the information
is kept inside these devices is revealed and distributed, security and privacy concerns call for an effective safeguarding process more than ever. Secured data transmission with higher voluminous data indulging with noisy instances, the computational cost and overhead incurred remains the
major issues for IoT based health care system. The complexity of the inferred model may increase, and thereby the overall secured data transmission accuracy of the model may decrease. In this work, the above said issues are addressed via secure data transmission method, in order to minimize
the computational cost and overhead incurred during transmission of large data and also improve the data transmission accuracy with minimum running time. The method is called as Delay-aware and Energy-efficient Laplace Angular Displacement (DE-LAD). The DE-LAD method involves three steps.
They are data collection, data communication and data transmission. First data collection is performed via delayaware and energy-efficient model. Second data communication is said to be established using pairing-free Laplace Estimator, minimizing computational complexity involved during data
collection. Finally, secured data transmission is achieved via Angular Displacement. Moreover, in WSN, the security of data being transmitted is calculated for IoT-based healthcare system. The simulation results of DE-LAD method provides enhanced performance in terms of security and complexity
as compared to conventional methods.
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Affiliation(s)
| | - A. Kannagi
- Jain Deemed to be University, 560069, India
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14
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El-Koubani O, Schneider C, Srinivasan P. 430 Evaluation of A Prioritisation Policy for HPB Resections in the COVID-19 Era. Br J Surg 2021. [DOI: 10.1093/bjs/znab259.666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Aim
The COVID19 pandemic has caused oncological services worldwide to face unprecedented challenges resulting in treatment disruptions for cancer patients requiring surgery. Hepatopancreatico-biliary cancers are characterised by a low resectability rate and rapid progression. This study aims to assess the effectiveness of a prioritisation policy for this cohort of patients during the initial COVID19 outbreak.
Method
The prioritisation policy and triage system are described in detail. Patients undergoing surgery between April-July 2020 (COVID period) were compared to a control group from the preceding year. Statistical analysis was carried out to evaluate timeliness of treatment, peri-operative characteristics and short-outcomes.
Results
Patient selection was restructured to prioritise patients with performance status of < 2 with presence of cancer complications, borderline resectable- or biologically aggressive disease. Where feasible, neoadjuvant therapy was advocated. An elective safe corridor pathway was established to reduce the risk of COVID19 infection. During the COVID19 and pre-COVID19 period, 94 and 115 patients underwent surgery, respectively. No patients contracted COVID19 post-operatively. There were less patients with ASA≥3 during the COVID19 period vs. pre-COVID19 (12.8% vs. 34.2%; p < 0.001). Median time between referral and surgery was greater during the COVID19 compared to the pre-COVID19 period, at 64 days vs. 49 days, respectively (p = 0.023). Despite this difference no NHS waiting list breaches occurred. Incidence of postoperative complications were comparable between groups.
Conclusions
The outlined prioritisation policy for oncological hepatopancreatico-biliary resections was effective in providing safe surgery during the COVID-19 outbreak. Whether the observed delay in treatment will affect long-term outcomes remains to be seen
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Affiliation(s)
| | - C Schneider
- King's College Hospital, London, United Kingdom
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15
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Srinivasan P, Shekhar A. Internalizing the external cost of gaseous and particulate matter emissions from the coal-based thermal power plants in India. Particulate Science and Technology 2021. [DOI: 10.1080/02726351.2020.1815256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- P. Srinivasan
- Department of Mechanical Engineering, Birla Institute of Technology and Science (BITS), Pilani, India
| | - Anand Shekhar
- Department of Mechanical Engineering, Birla Institute of Technology and Science (BITS), Pilani, India
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Govarthanan M, Khalifa AY, Kamala Kannan S, Srinivasan P, Selvankumar T, Selvam K, Kim W. Corrigendum to "Significance of allochthonous brackish water Halomonas sp. on biodegradation of low and high molecular weight polycyclic aromatic hydrocarbons" [Chemosphere 243 (2020) 125389]. Chemosphere 2021; 274:130509. [PMID: 33906738 DOI: 10.1016/j.chemosphere.2021.130509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- M Govarthanan
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea.
| | - Ashraf Yz Khalifa
- Biological Sciences Department, College of Science, King Faisal University, Saudi Arabia; Botany and Microbiology Department, Faculty of Science, University of Beni-Suef, Beni-Suef, Egypt
| | - S Kamala Kannan
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, 54596, Republic of Korea
| | - P Srinivasan
- PG& Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - T Selvankumar
- PG& Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - K Selvam
- PG& Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea
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Mandelker D, Donoghue M, Talukdar S, Bandlamudi C, Srinivasan P, Vivek M, Jezdic S, Hanson H, Snape K, Kulkarni A, Hawkes L, Douillard JY, Wallace SE, Rial-Sebbag E, Meric-Bersntam F, George A, Chubb D, Loveday C, Ladanyi M, Berger MF, Taylor BS, Turnbull C. Erratum to 'Germline-focussed analysis of tumour-only sequencing: recommendations from the ESMO Precision Medicine Working Group': [Annals of Oncology 30 (2019) 1221-1231]. Ann Oncol 2021; 32:1069-1071. [PMID: 34090768 PMCID: PMC8929238 DOI: 10.1016/j.annonc.2021.05.798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- D Mandelker
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, USA.
| | - M Donoghue
- Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, USA
| | - S Talukdar
- Department of Clinical Genetics, St George's University of London, London, UK
| | - C Bandlamudi
- Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, USA
| | - P Srinivasan
- Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, USA
| | - M Vivek
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, USA; Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, USA
| | - S Jezdic
- European Society for Medical Oncology (ESMO) Head Office, Lugano, Switzerland
| | - H Hanson
- Department of Clinical Genetics, St George's University of London, London, UK
| | - K Snape
- Department of Clinical Genetics, St George's University of London, London, UK
| | - A Kulkarni
- Department ofClinical Genetics, Guy and St Thomas' NHS Foundation Trust, London, UK
| | - L Hawkes
- Department of Clinical Genetics, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - J-Y Douillard
- European Society for Medical Oncology (ESMO) Head Office, Lugano, Switzerland
| | - S E Wallace
- Department of Health Sciences, University of Leicester, Leicester, UK
| | | | - F Meric-Bersntam
- Department of Investigational CancerTherapeutics, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - A George
- Cancer Genetics Unit, The Royal Marsden NHS Foundation Trust, London, UK; Division of Genetics and Epidemiology, Institute of Cancer Research, London, UK
| | - D Chubb
- Division of Genetics and Epidemiology, Institute of Cancer Research, London, UK
| | - C Loveday
- Division of Genetics and Epidemiology, Institute of Cancer Research, London, UK
| | - M Ladanyi
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, USA; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, USA
| | - M F Berger
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, USA; Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, USA
| | - B S Taylor
- Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, USA; Department of Clinical Genetics, St George's University of London, London, UK; Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, USA
| | - C Turnbull
- Department ofClinical Genetics, Guy and St Thomas' NHS Foundation Trust, London, UK; Division of Genetics and Epidemiology, Institute of Cancer Research, London, UK; William Harvey Research Institute, Queen Mary University of London, London, UK; Public Health England, London, UK.
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Rathika R, Srinivasan P, Alkahtani J, Al-Humaid LA, Alwahibi MS, Mythili R, Selvankumar T. Influence of biochar and EDTA on enhanced phytoremediation of lead contaminated soil by Brassica juncea. Chemosphere 2021; 271:129513. [PMID: 33429262 DOI: 10.1016/j.chemosphere.2020.129513] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/11/2020] [Accepted: 12/18/2020] [Indexed: 05/28/2023]
Abstract
Phytoremediation technology is an eco-friendly technology for the treatment of the polluted environment. Conversely, the natural and synthetic amendments have been revealed to improve the heavy metal phytoextraction from polluted soils with hyperaccumulation and/or non-hyper accumulating plants. This study evaluated the synergistic effect of biochar (BC) and EDTA to enhance phytoextraction of heavy metal lead (Pb) from artificially polluted soil by Brassica juncea. The BC and EDTA amendment enhanced the growth and survival of B. juncea under Pb stress environment. BC and EDTA significantly increased the biomass of B. juncea and significantly increased the total chlorophyll content in the combined amendment of BC and EDTA (22.2 mg/g) compared to the individual amendment of BC (12.8 mg/g) and EDTA (12.2 mg/g) respectively. The combined use of EDTA and biochar showed enhanced Pb uptake (60.2 mg/g) compared to control (10.0 mg/g). The order of Pb uptake was found to be BC + EDTA (60.2 mg/g) ˃ EDTA (23.5 mg/g) ˃ BC (22. 0 mg/g) ˃ control (10.0 mg/g). The maximum activity of SOD (35.2 ± 1.2 U/mg), POD (47.0 ± 1.8 U/mg) and CAT (28.0 ± 1.0 U/mg) was obtained in the mixed application of EDTA and BC. The obtained results revealed that the combined use of BC and EDTA was the most advantageous option for the treatment of Pb contaminated soil as compared to individual amendments.
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Affiliation(s)
- R Rathika
- PG& Research Department of Biotechnology, Mahendra Arts & Science College, Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - P Srinivasan
- PG& Research Department of Biotechnology, Mahendra Arts & Science College, Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - Jawaher Alkahtani
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - L A Al-Humaid
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Mona S Alwahibi
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - R Mythili
- PG& Research Department of Biotechnology, Mahendra Arts & Science College, Kalippatti, Namakkal, 637501, Tamil Nadu, India.
| | - T Selvankumar
- PG& Research Department of Biotechnology, Mahendra Arts & Science College, Kalippatti, Namakkal, 637501, Tamil Nadu, India.
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19
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Fang C, Kibriya N, Heaton ND, Prachalias A, Srinivasan P, Menon K, Peddu P. Safety and efficacy of irreversible electroporation treatment in hepatobiliary and pancreatic tumours: a single-centre experience. Clin Radiol 2021; 76:599-606. [PMID: 33934875 DOI: 10.1016/j.crad.2021.03.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 03/29/2021] [Indexed: 01/05/2023]
Abstract
AIM To report initial experience with irreversible electroporation (IRE) in a single tertiary oncology centre and to describe its role in the management of liver and pancreatic tumours. MATERIALS AND METHODS The present study was a retrospective review of the technical success rate, complications, and treatment efficacy of patients who had undergone IRE treatment for hepatobiliary and pancreatic tumours between February 2014 to January 2020. The patients were divided into two cohorts: first 30 patients (cohort A) and subsequent 70 patients (cohort B) after a change in protocol. RESULTS One hundred IRE procedures (n=69 liver lesions; n=28 pancreatic lesions, n=3 nodal disease) were reviewed. The overall technical success rate was 99%. Early and immediate complications were 4% and 3%, respectively. In cohort A, the complete tumour ablation rate was 65% (13/20) for hepatic tumours, 20% (1/5) for locally advanced pancreatic adenocarcinoma, 50% (2/4) for pancreatic neuroendocrine tumours, and 0% (0/1) for nodal metastasis. For cohort B, the rate improved to 87.76% (43/49) for hepatic tumours, 28.57% (4/14) for locally advanced pancreatic adenocarcinoma, 80% (4/5) for pancreatic neuroendocrine, and 50% (1/2) for nodal metastasis. After the initial cohort A, cohort B showed a significant increase in the initial complete ablation rate in hepatic tumours (p=0.028). CONCLUSION IRE is a complex technique with a steep learning curve. It is safe, effective, and is valuable in the treatment of liver tumours that are unsuitable or considered high risk for conventional thermal ablation. Its role in the management of pancreatic tumours is less clear and requires larger studies.
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Affiliation(s)
- C Fang
- Department of Radiology, King's College Hospital, Denmark Hill, London SE5 9RS, UK
| | - N Kibriya
- Department of Radiology, King's College Hospital, Denmark Hill, London SE5 9RS, UK
| | - N D Heaton
- Institute of Liver Studies, King's College Hospital, Denmark Hill, London SE5 9RS, UK
| | - A Prachalias
- Institute of Liver Studies, King's College Hospital, Denmark Hill, London SE5 9RS, UK
| | - P Srinivasan
- Institute of Liver Studies, King's College Hospital, Denmark Hill, London SE5 9RS, UK
| | - K Menon
- Institute of Liver Studies, King's College Hospital, Denmark Hill, London SE5 9RS, UK
| | - P Peddu
- Department of Radiology, King's College Hospital, Denmark Hill, London SE5 9RS, UK.
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20
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Goluguri NVRR, Devi KS, Srinivasan P. Rice-net: an efficient artificial fish swarm optimization applied deep convolutional neural network model for identifying the Oryza sativa diseases. Neural Comput Appl 2020. [DOI: 10.1007/s00521-020-05364-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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21
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Mandelker D, Donoghue M, Talukdar S, Bandlamudi C, Srinivasan P, Vivek M, Jezdic S, Hanson H, Snape K, Kulkarni A, Hawkes L, Douillard JY, Wallace SE, Rial-Sebbag E, Meric-Bersntam F, George A, Chubb D, Loveday C, Ladanyi M, Berger MF, Taylor BS, Turnbull C. Germline-focussed analysis of tumour-only sequencing: recommendations from the ESMO Precision Medicine Working Group. Ann Oncol 2020; 30:1221-1231. [PMID: 31050713 PMCID: PMC6683854 DOI: 10.1093/annonc/mdz136] [Citation(s) in RCA: 113] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
It is increasingly common in oncology practice to perform tumour sequencing using large cancer panels. For pathogenic sequence variants in cancer susceptibility genes identified on tumour-only sequencing, it is often unclear whether they are of somatic or constitutional (germline) origin. There is wide-spread disparity regarding both the extent to which systematic 'germline-focussed analysis' is carried out upon tumour sequencing data and for which variants follow-up analysis of a germline sample is carried out. Here we present analyses of paired sequencing data from 17 152 cancer samples, in which 1494 pathogenic sequence variants were identified across 65 cancer susceptibility genes. From these analyses, the European Society of Medical Oncology Precision Medicine Working Group Germline Subgroup has generated (i) recommendations regarding germline-focussed analyses of tumour-only sequencing data, (ii) indications for germline follow-up testing and (iii) guidance on patient information-giving and consent.
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Affiliation(s)
- D Mandelker
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York.
| | - M Donoghue
- Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York
| | - S Talukdar
- Department of Clinical Genetics, St George's University of London, London
| | - C Bandlamudi
- Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York
| | - P Srinivasan
- Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York
| | - M Vivek
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, USA; Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, USA
| | - S Jezdic
- European Society for Medical Oncology (ESMO) Head Office, Lugano, Switzerland
| | - H Hanson
- Department of Clinical Genetics, St George's University of London, London
| | - K Snape
- Department of Clinical Genetics, St George's University of London, London
| | - A Kulkarni
- Department of Clinical Genetics, Guy and St Thomas' NHS Foundation Trust, London
| | - L Hawkes
- Department of Clinical Genetics, Oxford University Hospitals NHS Foundation Trust, Oxford
| | - J-Y Douillard
- European Society for Medical Oncology (ESMO) Head Office, Lugano, Switzerland
| | - S E Wallace
- Department of Health Sciences, University of Leicester, Leicester, UK
| | | | - F Meric-Bersntam
- Department of Investigational Cancer Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - A George
- Cancer Genetics Unit, The Royal Marsden NHS Foundation Trust, London; Division of Genetics and Epidemiology, Institute of Cancer Research, London
| | - D Chubb
- Division of Genetics and Epidemiology, Institute of Cancer Research, London
| | - C Loveday
- Division of Genetics and Epidemiology, Institute of Cancer Research, London
| | - M Ladanyi
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York; Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, USA
| | - M F Berger
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York; Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York
| | - B S Taylor
- Marie-Josee and Henry R. Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York; Department of Clinical Genetics, St George's University of London, London; Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, USA
| | - C Turnbull
- Department of Clinical Genetics, Guy and St Thomas' NHS Foundation Trust, London; Division of Genetics and Epidemiology, Institute of Cancer Research, London; William Harvey Research Institute, Queen Mary University of London, London; Public Health England, London, UK.
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22
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Balaji J, Srinivasan P, Prabu S, George M, Sajan D. Growth and dielectric studies of toluidine tartrate single crystals:A novel organic NLO material. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.127750] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Rathika R, Khalifa AYZ, Srinivasan P, Praburaman L, Kamala-Kannan S, Selvankumar T, Kim W, Govarthanan M. Effect of citric acid and vermi-wash on growth and metal accumulation of Sorghum bicolor cultivated in lead and nickel contaminated soil. Chemosphere 2020; 243:125327. [PMID: 31733538 DOI: 10.1016/j.chemosphere.2019.125327] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/31/2019] [Accepted: 11/05/2019] [Indexed: 06/10/2023]
Abstract
The aim of the present study is to assess the influence of vermi-wash (VW) and citric acid (CA) on Sorghum bicolor growth and phytoaccumulation of lead (Pb) and nickel (Ni) contaminated soil. The biomass of the S. bicolor has been enhanced by the addition of VW (24 and 26%) and CA (11 and 9%) in Pb and Ni contaminated soil, respectively. The VW treatment showed enhanced shoot and root lengths and chlorophyll concentrations compared to CA. The shoot anatomic structure showed an accumulation of Pb and Ni were positively impacted by the amendment of VW and CA. In addition, VW treatment showed enhanced antioxidant enzymes activity (140, 125 and 152 U/mg of CAT, SOD and POD). Further, the plants grown in Pb contaminated soil treated with VW showed enhanced Rubisco activity of 1.49 U/ml, whereas, CA treatment showed 1.23 U/ml of Rubisco. It has been observed that the VW showed as a potential chelator as well as plant beneficial formulation for the enhanced phyto-remediation of Pb and Ni.
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Affiliation(s)
- R Rathika
- PG & Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - Ashraf Y Z Khalifa
- Biological Sciences Department, College of Science, King Faisal University, Saudi Arabia; Botany and Microbiology Department, Faculty of Science, University of Beni-Suef, Beni-Suef, Egypt
| | - P Srinivasan
- PG & Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - L Praburaman
- School of Mineral Processing and Bio Engineering, Central South University, 932 South Lushan, Hunan, 410083, PR China
| | - S Kamala-Kannan
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, 54596, South Korea
| | - T Selvankumar
- PG & Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, 637501, Tamil Nadu, India.
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea.
| | - M Govarthanan
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea.
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24
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Govarthanan M, Khalifa AY, Kamala-Kannan S, Srinivasan P, Selvankumar T, Selvam K, Kim W. Significance of allochthonous brackish water Halomonas sp. on biodegradation of low and high molecular weight polycyclic aromatic hydrocarbons. Chemosphere 2020; 243:125389. [PMID: 31765893 DOI: 10.1016/j.chemosphere.2019.125389] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 11/11/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
The present study is aimed to isolate and identify polycyclic aromatic hydrocarbons (PAHs) degrading bacteria from brackish water and to assess the biodegradation efficiency against low and high molecular weight PAHs. Among 15 isolates, the isolate designated as RM effectively degraded 100 mg/L of phenanthrene (Phe) (67.0%), pyrene (Pyr) (63.0%), naphthalene (NaP) (60.0%), and benzo [a]pyrene (BaP) (58.0%) after 7 days of incubation. Carbon sources, pH, and salinity of the culture medium were optimized to enhance the growth and PAHs biodegradation of the isolate RM. Sucrose was found to be an excellent carbon source to enhance PAHs biodegradation (Phe, 75.0; Pyr, 68.5; NaP, 62.5; and BaP, 59.5%). Furthermore, the isolate showed enhanced degradation at pH 7.0 and 4% salinity. The isolate RM was identified as Halomonas sp. based on partial 16S rDNA gene sequence analysis. The results indicated that the isolate RM (i.e., Halomonas sp.) has the potential to be used in remediation of oil spills in the marine ecosystem.
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Affiliation(s)
- M Govarthanan
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea.
| | - Ashraf Yz Khalifa
- Biological Sciences Department, College of Science, King Faisal University, Saudi Arabia; Botany and Microbiology Department, Faculty of Science, University of Beni-Suef, Beni-Suef, Egypt
| | - S Kamala-Kannan
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, 54596, Republic of Korea
| | - P Srinivasan
- PG& Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - T Selvankumar
- PG& Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - K Selvam
- PG& Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea.
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25
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Ramasubbareddy S, Balamurugan B, Sankar S, Srinivasan P. Energy-aware multipath routing protocol for internet of things using network coding techniques. IJGUC 2020. [DOI: 10.1504/ijguc.2020.10032056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Sankar S, Srinivasan P, Ramasubbareddy S, Balamurugan B. Energy-aware multipath routing protocol for internet of things using network coding techniques. IJGUC 2020. [DOI: 10.1504/ijguc.2020.110899] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Srinivasan P, Selvankumar T, Kamala-Kannan S, Mythili R, Sengottaiyan A, Govarthanan M, Senthilkumar B, Selvam K. Production and purification of laccase by Bacillus sp. using millet husks and its pesticide degradation application. 3 Biotech 2019; 9:396. [PMID: 31656734 PMCID: PMC6789060 DOI: 10.1007/s13205-019-1900-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 09/16/2019] [Indexed: 01/31/2023] Open
Abstract
Lignocellulosic agricultural bi-products, pearl millet (PM) and finger millet (FM) husks, were used for the production of laccase using Bacillus sp. PS under solid-state fermentation (SSF). Abiotic variables such as substrate (PM, FM) concentration (1-5%), incubation time (24-96 h) and pH (5-10) were optimized using Response surface methodology (RSM) to maximize the laccase production. The predicted model showed maximum laccase activity of 402 U/mL appearing after 96 h of incubation with PM 2.0 g/L and FM 1.5 g/L at pH 7.0. Single protein band on sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) confirmed homogeneity of the laccase with a molecular weight of 63-75 kDa. The partially purified laccase effectively degraded the pesticides (Tricel, 71.8 ± 3.5 and Phoskill 77.3 ± 3.4%) within 5 days of incubation (40 °C) in pH 7.0. The pesticide degradation was further confirmed by high-performance liquid chromatography (HPLC) and the chromatograms showed the single dominant peaks at retention time 2.482 (tricel) and 2.608 (phoskill) min, respectively. Pesticide-degrading laccase was produced by Bacillus sp. PS under SSF reveals the utilization of low-cost bi-substrates for enhanced laccase production.
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Affiliation(s)
- P. Srinivasan
- PG and Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, Tamil Nadu 637501 India
| | - T. Selvankumar
- PG and Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, Tamil Nadu 637501 India
| | - S. Kamala-Kannan
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, 570752 South Korea
| | - R. Mythili
- PG and Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, Tamil Nadu 637501 India
| | - A. Sengottaiyan
- PG and Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, Tamil Nadu 637501 India
| | - M. Govarthanan
- PG and Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, Tamil Nadu 637501 India
| | - B. Senthilkumar
- Department of Medical Microbiology, College of Health and Medical Sciences, Haramaya University, P.O.Box 235, Harar, Ethiopia
| | - K. Selvam
- PG and Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, Tamil Nadu 637501 India
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28
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Govarthanan M, Mythili R, Kamala-Kannan S, Selvankumar T, Srinivasan P, Kim H. In-vitro bio-mineralization of arsenic and lead from aqueous solution and soil by wood rot fungus, Trichoderma sp. Ecotoxicol Environ Saf 2019; 174:699-705. [PMID: 30878010 DOI: 10.1016/j.ecoenv.2019.03.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 03/06/2019] [Accepted: 03/07/2019] [Indexed: 06/09/2023]
Abstract
In the present study, we investigated the role of calcite, i.e., microbiologically-induced precipitate by ureolytic Trichoderma sp. MG, in remediation of soils contaminated with arsenic (As) and lead (Pb). The fungus tolerates high concentrations of As (500 mg/L) and Pb (650 mg/L). The effects of three factors, i.e., urea concentration, CaCl2 concentration and pH, on urease production and bio-mineralization of As and Pb were investigated using Box-Behnken design. The maximum urease production (920 U/mL) and metal removal efficiency (68% and 59% for Pb and AS, respectively) were observed in the medium containing urea of 300 mM and CaCl2 of 75 mM at pH 9.0. Fourier transform infrared spectroscopy result revealed the formation of metal carbonates by the isolate MG. Sequential extraction of metals revealed that the carbonate fractions of As and Pb were increased to 46.4% and 42.4% in bioremediated soil, whereas in control they were 35.5% and 32.5%, respectively. The X-ray powder diffraction result further confirmed the role of calcite precipitate in bioremediation of As- and Pb-contaminated soils. The results points out that the microbiologically-induced calcite precipitation is a feasible, eco-friendly technology for the bioremediation of As- and Pb-contaminated sites.
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Affiliation(s)
- M Govarthanan
- Department of Environmental Engineering, University of Seoul, Seoul 02504, South Korea.
| | - R Mythili
- PG & Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal 637501, Tamil Nadu, India
| | - S Kamala-Kannan
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan 54596, South Korea
| | - T Selvankumar
- PG & Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal 637501, Tamil Nadu, India
| | - P Srinivasan
- PG & Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal 637501, Tamil Nadu, India
| | - H Kim
- Department of Environmental Engineering, University of Seoul, Seoul 02504, South Korea.
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29
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Govarthanan M, Kamala-Kannan S, Selvankumar T, Mythili R, Srinivasan P, Kim H. Effect of blue light on growth and exopolysaccharides production in phototrophic Rhodobacter sp. BT18 isolated from brackish water. Int J Biol Macromol 2019; 131:74-80. [DOI: 10.1016/j.ijbiomac.2019.03.049] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 03/06/2019] [Accepted: 03/06/2019] [Indexed: 12/31/2022]
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30
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Sudha A, Srinivasan P, Kanimozhi V, Palanivel K, Kadalmani B. Antiproliferative and apoptosis-induction studies of 5-hydroxy 3′,4′,7-trimethoxyflavone in human breast cancer cells MCF-7: an in vitro and in silico approach. J Recept Signal Transduct Res 2018; 38:179-190. [DOI: 10.1080/10799893.2018.1468780] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- A. Sudha
- Department of Bioinformatics, Alagappa University, Karaikudi, India
| | - P. Srinivasan
- Department of Animal Health and Management, Alagappa University, Karaikudi, India
| | - V. Kanimozhi
- Department of Animal Science, School of Life Sciences, Bharathidasan University, Tiruchirappalli, India
| | - K. Palanivel
- Department of Animal Science, School of Life Sciences, Bharathidasan University, Tiruchirappalli, India
| | - B. Kadalmani
- Department of Animal Science, School of Life Sciences, Bharathidasan University, Tiruchirappalli, India
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Puri Y, Srinivasan P, Peddu P, Heaton N. Case Report of Multiple Bilobar Hepatic Arterio-Portal Fistulas Post-Liver Transplantation Managed Conservatively. Transplant Proc 2018; 50:920-924. [PMID: 29661463 DOI: 10.1016/j.transproceed.2017.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 08/24/2017] [Accepted: 12/04/2017] [Indexed: 10/17/2022]
Abstract
Multiple intrahepatic arterio-portal fistulas are rare. The majority are isolated and occur secondary to liver trauma including iatrogenic interventions such as liver biopsy. Post-liver transplantation 18 cases have been reported, all secondary to an interventional radiological procedure. We report multiple bi-lobar arterio-portal fistulas in a liver transplant recipient recognized 1 year after transplantation. The donor died due to intracerebral bleeding following blunt head and abdominal trauma. In the present case, the etiology is not very clear. The patient was managed conservatively and to date has not required intervention.
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Affiliation(s)
- Y Puri
- Institute of Liver Studies, King's College Hospital, Denmark Hill, England.
| | - P Srinivasan
- Institute of Liver Studies, King's College Hospital, Denmark Hill, England
| | - P Peddu
- Institute of Liver Studies, King's College Hospital, Denmark Hill, England
| | - N Heaton
- Institute of Liver Studies, King's College Hospital, Denmark Hill, England
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Affiliation(s)
- P. Srinivasan
- La Jolla Institute of Allergy and Immunology; La Jolla, CA 92037 USA
- 4110 Harold Frank Hall; Dept. of ECE, University of California; Santa Barbara, CA 93106 USA
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Sasikala V, Sajan D, Joseph L, Balaji J, Prabu S, Srinivasan P. Spectroscopic and DFT-based computational studies on the molecular electronic structural characteristics and the third-order nonlinear property of an organic NLO crystal: ( E )- N ′-(4-chlorobenzylidene)-4-methylbenzenesulfonohydrazide. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.02.039] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Suresh P, Johnson Rajeswar J, Sukumar K, Harikrishnan TJ, Srinivasan P. Complete nucleotide sequence analysis of the oncogene "Meq" from serotype 1 Marek's disease virus isolates from India. Br Poult Sci 2017; 58:111-115. [PMID: 28043157 DOI: 10.1080/00071668.2016.1257780] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
1. A study was undertaken to characterise the oncogene Meq at the molecular level for three serotype 1 Marek's disease virus (MDV) field isolates from vaccinated poultry flocks which had encountered a Marek's disease outbreak in the southern part of India. The isolates were named Ind/TN/11/01, Ind/KA/12/02 and Ind/TN/12/03. The oncogene Meq was amplified by PCR and sequenced. 2. The isolates were shown to have a homology for the Meq gene of 99.1-99.8% with various isolates from China and 98.5-99.2% with isolates from Europe and the USA. Alignment analysis of the nucleotide sequences showed that nucleotide mutations at 5 different positions in the Meq gene displayed perfect regularity in MDVs circulating in the southern part of India, which could be considered as features of field MDVs recently prevalent in this area. 3. In addition, the mutation in the Meq gene at positions 251, 260 and 437 was unique and coincides with very virulent strains from China GX0101, GXY2 and a Hungarian strain ATE. The mutation at positions 283 and 300 was unique and coincides with the very virulent strain ATE of Hungary. There were also single nucleotide mutations at positions 155 (A-T), 369 (A-C), 462 (C-A) and 548 (C-T) observed in the isolate Ind/TN/12/03. 4. Phylogenetic analysis of Meq sequences revealed that field MDVs in this area evolved independently but have similarities with very virulent strains from China, and that Meq has more similarities with the very virulent Hungarian strain.
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Affiliation(s)
- P Suresh
- a Department of Veterinary Microbiology , Veterinary College and Research Institute , Namakkal , India
| | - J Johnson Rajeswar
- b Department of Veterinary Microbiology , Veterinary College and Research Institute , Tirunelveli , India
| | - K Sukumar
- a Department of Veterinary Microbiology , Veterinary College and Research Institute , Namakkal , India
| | - T J Harikrishnan
- c Director of Research , Tamilnadu Veterinary and Animal Sciences University (TANUVAS) , Chennai , India
| | - P Srinivasan
- d Poultry Disease Diagnosis and Surveillance Laboratory , Veterinary College and Research Institute , Namakkal , India
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Stephen AD, Nidhin PV, Srinivasan P. Ab initio prediction of plausible conformers of a flexible N-(3-chloro-4-fluorophenyl)thiourea (CFT) molecule: A validation study. J STRUCT CHEM+ 2016. [DOI: 10.1134/s0022476616060056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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36
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Reetha TL, Rajeswar JJ, Harikrishnan TJ, Sukumar K, Srinivasan P, Kirubakaran JJ. Studies on the effectiveness of oral pellet vaccine in improving egg production and egg quality in desi chicken. Vet World 2016; 9:900-3. [PMID: 27651681 PMCID: PMC5021842 DOI: 10.14202/vetworld.2016.900-903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 07/19/2016] [Indexed: 11/16/2022] Open
Abstract
AIM To study the effect of Newcastle disease (ND) oral pellet vaccine in egg production and egg quality in desi chicken. MATERIALS AND METHODS The study was conducted at Veterinary University Training and Research Centre, Tiruchirapalli, Tamil Nadu. A total of 48-day-old desi chicks obtained from a private hatchery in Namakkal, Tamil Nadu, were maintained under cage system of rearing up to 52 weeks of age as per standard management practices. All the 48 chicks were divided into six groups having eight chicks in each group were subjected to different treatment regimes. All the birds were challenged at 52 weeks of age with 0.5 ml dose of 10(4.0) egg infectious dose 50 virulent ND field virus. 10 eggs from each group were randomly collected during the last 3 days of 8 weeks interval period from 28 to 52 weeks of age and were used to measure the egg quality parameters. The production performance of each group was assessed at 4 weeks interval period from 25 to 52 weeks of age. RESULTS In all the six treatment groups with respect to egg production, no significant difference (p≥0.05) was noticed from 25 to 52 weeks of age. Similarly, in egg weight, egg shape index and specific gravity, no significant difference (p≥0.05) was noticed from 28 to 52 weeks of age. CONCLUSION From this study, it is concluded that the administration of ND oral pellet vaccine to desi chicken does not affect the egg production performance, egg weight, egg shape index, and specific gravity of egg.
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Affiliation(s)
- T Lurthu Reetha
- Tamil Nadu Veterinary and Animal Sciences University - Regional Research, Pudukkottai - 622 004, Tamil Nadu, India
| | - J Johnson Rajeswar
- Department of Veterinary Microbiology, Veterinary College and Research Institute, Tirunelveli - 627 001, Tamil Nadu, India
| | - T J Harikrishnan
- Directorate of Research, Tamil Nadu Veterinary and Animal Sciences University, Chennai - 600 051, Tamil Nadu, India
| | - K Sukumar
- Department of Veterinary Microbiology, Veterinary College and Research Institute, Namakkal - 637 002, Tamil Nadu, India
| | - P Srinivasan
- Veterinary University Training and Research Centre, Nagapattinam, Tamil Nadu, India
| | - J John Kirubakaran
- Department of Veterinary Microbiology, Madras Veterinary College, Chennai - 600 007, Tamil Nadu, India
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Dulla EL, Kathera C, Gurijala HK, Mallakuntla TR, Srinivasan P, Prasad V, Mopati RD, Jasti PK. Highlights of DNA Barcoding in identification of salient microorganisms like fungi. J Mycol Med 2016; 26:291-297. [PMID: 27402509 DOI: 10.1016/j.mycmed.2016.05.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 04/22/2016] [Accepted: 05/25/2016] [Indexed: 11/19/2022]
Abstract
Fungi, the second largest kingdom of eukaryotic life, are diverse and widespread. Fungi play a distinctive role in the production of different products on industrial scale, like fungal enzymes, antibiotics, fermented foods, etc., to give storage stability and improved health to meet major global challenges. To utilize algae perfectly for human needs, and to pave the way for getting a healthy relationship with fungi, it is important to identify them in a quick and robust manner with molecular-based identification system. So, there is a technique that aims to provide a well-organized method for species level identifications and to contribute powerfully to taxonomic and biodiversity research is DNA Barcoding. DNA Barcoding is generally achieved by the retrieval of a short DNA sequence - the 'barcode' - from a standard part of the genome and that barcode is then compared with a library of reference barcode sequences derived from individuals of known identity for identification.
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Affiliation(s)
- E L Dulla
- Department of Biotechnology, Sri Venkateswara University, Tirupati, Andhra Pradesh 517502, India
| | - C Kathera
- Jiangsu key laboratory for Molecular and Medicak Biotechnology, College of life sciences, Nanjing normal university, Nanjing, China
| | - H K Gurijala
- Department of Biotechnology, Sri Venkateswara University, Tirupati, Andhra Pradesh 517502, India; Department of Microbiology, Sri Venkateswara University, Tirupati, Andhra Pradesh 517502, India
| | - T R Mallakuntla
- Department of Microbiology, Sri Venkateswara University, Tirupati, Andhra Pradesh 517502, India
| | - P Srinivasan
- Department of Microbiology, Sri Venkateswara University, Tirupati, Andhra Pradesh 517502, India
| | - V Prasad
- Jiangsu key laboratory for Molecular and Medicak Biotechnology, College of life sciences, Nanjing normal university, Nanjing, China
| | - R D Mopati
- Department of Microbiology, Sri Venkateswara University, Tirupati, Andhra Pradesh 517502, India
| | - P K Jasti
- Department of Biotechnology, Sri Venkateswara University, Tirupati, Andhra Pradesh 517502, India.
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Thamilarasan V, Sengottuvelan N, Stalin N, Srinivasan P, Chakkaravarthi G. Synthesis, interactions, molecular structure, biological properties and molecular docking studies on Mn, Co, Zn complexes containing acetylacetone and pyridine ligands with DNA duplex. Journal of Photochemistry and Photobiology B: Biology 2016; 160:110-20. [DOI: 10.1016/j.jphotobiol.2016.03.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 02/20/2016] [Accepted: 03/14/2016] [Indexed: 12/24/2022]
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Sudha A, Srinivasan P, Thamilarasan V, Sengottuvelan N. Exploring the binding mechanism of 5-hydroxy-3',4',7-trimethoxyflavone with bovine serum albumin: Spectroscopic and computational approach. Spectrochim Acta A Mol Biomol Spectrosc 2016; 157:170-181. [PMID: 26773261 DOI: 10.1016/j.saa.2015.12.028] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 12/16/2015] [Accepted: 12/20/2015] [Indexed: 06/05/2023]
Abstract
The current study was carried out to investigate the binding mechanism of a potential flavonoid compound 5-hydroxy-3',4',7-trimethoxyflavone (HTMF) with bovine serum albumin (BSA) using ultraviolet-visible, fluorescence, circular dichroism (CD) spectral measurements along with molecular docking and molecular dynamics (MD) simulation. It was confirmed from fluorescence spectra that the intrinsic fluorescence of BSA was robustly quenched by HTMF through a static quenching mechanism. The number of binding sites (n) for HTMF binding on BSA was found to be about one. The thermodynamic parameters estimated from the van't Hoff plot specified that hydrophobic force was the predominant force in the HTMF-BSA complex and there also exist hydrogen bonds and electrostatic interactions. The effect of HTMF on the BSA conformation examined using CD studies revealed that there is a decrease in the helical content of BSA upon HTMF interaction. The results of molecular docking study shed light on the binding mode which exposed that HTMF bind within the hydrophobic pocket of the subdomain IIIA of BSA. The stability of HTMF-BSA complex with respect to free protein was analyzed from the molecular dynamic studies. The electronic structure analysis of HTMF was achieved by using density functional theory (DFT) calculations at B3LYP/6-31G** level to support its antioxidant role. The results of computational analysis are in good consistence with the experimental data and the present findings suggested that HTMF exhibits a good binding propensity to BSA protein which will be helpful for the drug design.
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Affiliation(s)
- A Sudha
- Department of Bioinformatics, Alagappa University, Karaikudi 630 004, India
| | - P Srinivasan
- Department of Bioinformatics, Alagappa University, Karaikudi 630 004, India; Department of Animal Health and Management, Alagappa University, Karaikudi 630 004, India.
| | - V Thamilarasan
- Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, India
| | - N Sengottuvelan
- Department of Chemistry, Directorate of Distance Education, Alagappa University, Karaikudi 630 004, India
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40
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Srinivasan P. Multifunctional-layered materials for creating membrane-restricted nanodomains and nanoscale imaging. Appl Phys Lett 2016; 108:033702. [PMID: 26869725 PMCID: PMC4723406 DOI: 10.1063/1.4940388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 01/11/2016] [Indexed: 06/05/2023]
Abstract
Experimental platform that allows precise spatial positioning of biomolecules with an exquisite control at nanometer length scales is a valuable tool to study the molecular mechanisms of membrane bound signaling. Using micromachined thin film gold (Au) in layered architecture, it is possible to add both optical and biochemical functionalities in in vitro. Towards this goal, here, I show that docking of complementary DNA tethered giant phospholiposomes on Au surface can create membrane-restricted nanodomains. These nanodomains are critical features to dissect molecular choreography of membrane signaling complexes. The excited surface plasmon resonance modes of Au allow label-free imaging at diffraction-limited resolution of stably docked DNA tethered phospholiposomes, and lipid-detergent bicelle structures. Such multifunctional building block enables realizing rigorously controlled in vitro set-up to model membrane anchored biological signaling, besides serving as an optical tool for nanoscale imaging.
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Affiliation(s)
- P Srinivasan
- Department of Electrical and Computer Engineering, University of California , Santa Barbara, California 93106, USA and Neuroscience Research Institute, University of California , Santa Barbara, California 93106, USA
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41
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Arthi P, Shobana S, Srinivasan P, Prabhu D, Arulvasu C, Kalilur Rahiman A. Dinuclear manganese(II) complexes of hexaazamacrocycles bearing N-benzoylated pendant separated by aromatic spacers: Antibacterial, DNA interaction, cytotoxic and molecular docking studies. Journal of Photochemistry and Photobiology B: Biology 2015; 153:247-60. [DOI: 10.1016/j.jphotobiol.2015.09.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/21/2015] [Accepted: 09/25/2015] [Indexed: 12/17/2022]
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42
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Kumar KS, Ranjith S, Sudhakar S, Srinivasan P, Ponnuswamy MN. Crystal structure of piperazine-1,4-diium bis-(4-amino-benzene-sulfonate). Acta Crystallogr E Crystallogr Commun 2015; 71:o1084-5. [PMID: 26870510 PMCID: PMC4719991 DOI: 10.1107/s2056989015024457] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 12/19/2015] [Indexed: 09/01/2023]
Abstract
The asymmetric unit of the title salt, C4H12N2 (2+)·2C6H6NO3S(-), consists of half a piperazindiium dication, located about an inversion centre, and a 4-amino-benzene-sulfonate anion. The piperazine ring adopts a chair conformation. In the crystal, the cations and anions are linked via N-H⋯O and C-H⋯O hydrogen bonds, forming a three-dimensional framework. Within the framework there are C-H⋯π inter-actions and the N-H⋯O hydrogen bonds result in the formation of R 4 (4)(22) and R 3 (4)(13) ring motifs.
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Affiliation(s)
- K Sathesh Kumar
- Department of Physics, SRM University, Ramapuram Campus, Chennai 600 089, India
| | - S Ranjith
- Department of Physics, SRM University, Ramapuram Campus, Chennai 600 089, India
| | - S Sudhakar
- Department of Physics, Alagappa University, Karaikudi 630 003, India
| | - P Srinivasan
- Department of Physics, University College of Engineering, Panruti, Cuddalore 607 106, India
| | - M N Ponnuswamy
- Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India
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43
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Srinivasan P, Stephen AD. DFT and Bader's AIM analysis of 2,5-,diphenyl-1,3,4-oxadizole molecule: A organic light emitting diode (OLED). J Theor Comput Chem 2015. [DOI: 10.1142/s0219633615500388] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The electron density and conductivity studies of 2,5-diphenyl-1,3,4-oxadizole organic light emitting diode (OLED) based molecule have been calculated from the quantum chemical calculations and combined with the Bader's AIM theory. Density functional theory calculations with B3LYP/aug-cc-PVDZ basis sets was used to determine ground state gas space molecular geometries (bond lengths and bond angles), electron density and bonding features of this molecule. The electron densities at the bond critical point (BCP) of aromatic Car–Car bonds are much stronger than the other bonds in the molecule. The calculated HOMO and LUMO energies show that charge transfer occurs within the molecule. The HOMO–LUMO gap calculated from quantum chemical calculations has been compared with the value calculated from the density of states. The negative electrostatic potential (ESP) is concentrated solely around the N atoms, whereas in the rest of the region a positive ESP to dominate.
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Affiliation(s)
- P. Srinivasan
- Department of Physics, C. Kandaswami Naidu College for Men, Anna Nagar, Chennai, India
| | - A. David Stephen
- Department of Physics, Sri Shakthi Institute of Engineering and Technology, Coimbatore, India
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Abstract
The latest mobile phone in addition to being a communication device now is also able to do most functions of a computer. These mobile devices are now called smartphones. These smartphones can use various applications (called apps) which have revolutionized the use of these devices. We discuss the uses of smartphones in maxillofacial surgery and how they have made the work of the maxfac surgeon easier.
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Affiliation(s)
- S Senthoor Pandian
- Department of Oral and Maxillofacial Surgery, Rajah Muthiah Dental College, Annamalai University, Annamalai Nagar, Chidambaram, 608 002 Tamilnadu India
| | - P Srinivasan
- Department of Oral and Maxillofacial Surgery, Rajah Muthiah Dental College, Annamalai University, Annamalai Nagar, Chidambaram, 608 002 Tamilnadu India
| | - Shanker Mohan
- Department of Oral and Maxillofacial Surgery, Rajah Muthiah Dental College, Annamalai University, Annamalai Nagar, Chidambaram, 608 002 Tamilnadu India
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Kumar S, Srinivasan P, Sharma SD, Saxena SK, Bakshi AK, Dash A, Babu DAR, Sharma DN. Determination of surface dose rate of indigenous (32)P patch brachytherapy source by experimental and Monte Carlo methods. Appl Radiat Isot 2015; 103:120-7. [PMID: 26086681 DOI: 10.1016/j.apradiso.2015.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 03/14/2015] [Accepted: 06/02/2015] [Indexed: 11/25/2022]
Abstract
Isotope production and Application Division of Bhabha Atomic Research Center developed (32)P patch sources for treatment of superficial tumors. Surface dose rate of a newly developed (32)P patch source of nominal diameter 25 mm was measured experimentally using standard extrapolation ionization chamber and Gafchromic EBT film. Monte Carlo model of the (32)P patch source along with the extrapolation chamber was also developed to estimate the surface dose rates from these sources. The surface dose rates to tissue (cGy/min) measured using extrapolation chamber and radiochromic films are 82.03±4.18 (k=2) and 79.13±2.53 (k=2) respectively. The two values of the surface dose rates measured using the two independent experimental methods are in good agreement to each other within a variation of 3.5%. The surface dose rate to tissue (cGy/min) estimated using the MCNP Monte Carlo code works out to be 77.78±1.16 (k=2). The maximum deviation between the surface dose rates to tissue obtained by Monte Carlo and the extrapolation chamber method is 5.2% whereas the difference between the surface dose rates obtained by radiochromic film measurement and the Monte Carlo simulation is 1.7%. The three values of the surface dose rates of the (32)P patch source obtained by three independent methods are in good agreement to one another within the uncertainties associated with their measurements and calculation. This work has demonstrated that MCNP based electron transport simulations are accurate enough for determining the dosimetry parameters of the indigenously developed (32)P patch sources for contact brachytherapy applications.
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Affiliation(s)
- Sudhir Kumar
- Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, CTCRS, Anushaktinagar, Mumbai 400094, India.
| | - P Srinivasan
- Radiation Safety Systems Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - S D Sharma
- Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, CTCRS, Anushaktinagar, Mumbai 400094, India
| | - Sanjay Kumar Saxena
- Isotope Production & Applications Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - A K Bakshi
- Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, CTCRS, Anushaktinagar, Mumbai 400094, India
| | - Ashutosh Dash
- Isotope Production & Applications Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - D A R Babu
- Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, CTCRS, Anushaktinagar, Mumbai 400094, India
| | - D N Sharma
- Health Safety and Environment Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
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46
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Balaji J, Prabu S, Srinivasan P, Srinivasan T, Velmurugan D. Studies on the growth and characterization of a non linear optical crystal: 3 Hydroxy Pyridinium Tartrate Mono Hydrate (3HPTMH). Spectrochim Acta A Mol Biomol Spectrosc 2015; 144:139-147. [PMID: 25754389 DOI: 10.1016/j.saa.2015.01.091] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 12/19/2014] [Accepted: 01/29/2015] [Indexed: 06/04/2023]
Abstract
Single crystals of 3 Hydroxy Pyridinium Tartrate Mono Hydrate (3HPTMH) was synthesised and successfully grown in mixed solvent of ethanol and water by slow evaporation technique at room temperature. 3HPTMH belongs to the orthorhombic crystal system with space group P212121. The lattice parameters of 3HPTMH are a=7.4597(2)Å, b=8.7012(3)Å, c=17.8786(5)Å, V=1160.47(6)Å(3), obtained by single crystal X ray diffraction studies. Hyperpolarizability and HOMO-LUMO analysis were performed for grown crystal using DFT calculations using Gaussian 03 software. Functional groups were identified by FT-IR studies. The lower cut-off wavelength of the 3HPTMH has been identified by UV-Vis study. The thermal behavior has been studied by thermal gravimetric analysis and differential thermal analysis. The powder second harmonic generation efficiency of 3HPTMH was compared with KDP.
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Affiliation(s)
- J Balaji
- Department of Physics, University College of Engineering: Panruti (A Constituent College of Anna University Chennai), Panruti 607 106, India
| | - S Prabu
- Department of Physics, University College of Engineering: Panruti (A Constituent College of Anna University Chennai), Panruti 607 106, India
| | - P Srinivasan
- Department of Physics, University College of Engineering: Panruti (A Constituent College of Anna University Chennai), Panruti 607 106, India.
| | - T Srinivasan
- CAS in Crystallography and BioPhysics, University of Madras, Chennai 600 025, India
| | - D Velmurugan
- CAS in Crystallography and BioPhysics, University of Madras, Chennai 600 025, India
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47
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Srinivasan P, Mohan S, Pradeep Kumar R. A Soft, Flexible Stent/Bung for Marsupialisation. J Maxillofac Oral Surg 2015; 14:497-8. [DOI: 10.1007/s12663-014-0652-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Accepted: 06/18/2014] [Indexed: 11/30/2022] Open
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48
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Arthi P, Shobana S, Srinivasan P, Mitu L, Kalilur Rahiman A. Synthesis, characterization, biological evaluation and docking studies of macrocyclic binuclear manganese(II) complexes containing 3,5-dinitrobenzoyl pendant arms. Spectrochim Acta A Mol Biomol Spectrosc 2015; 143:49-58. [PMID: 25710114 DOI: 10.1016/j.saa.2015.01.122] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 12/15/2014] [Accepted: 01/31/2015] [Indexed: 06/04/2023]
Abstract
A series of bis(phenoxo) bridged binuclear manganese(II) complexes of the type [Mn2L(1-3)](ClO4)2 (1-3) containing 3,5-dinitrobenzoyl pendant-arms have been synthesized by cyclocondensation of 2,6-diformyl-4-R-phenols (where R=CH3, C(CH3)3 or Br) with 2,2'-3,5-dinitrobenzoyliminodi(ethylamine) trihydrochloride in the presence of manganese(II) perchlorate. The IR spectra of complexes indicate the presence of uncoordinated perchlorate anions. The UV-Vis spectra of complexes suggest the distorted octahedral geometry around manganese(II) nuclei. The EPR spectra of Mn(II) complexes show a broad signal with g value 2.03-2.04, which is characteristic for octahedral high spin Mn(2+) complex. The observed room temperature magnetic moment values of the Mn(II) complexes (5.60-5.62B.M.) are less than the normal value (5.92B.M.), indicating weak antiferromagnetic coupling interaction between the two metal ions. Electrochemical studies of the complexes show two distinct quasi-reversible one electron transfer processes in the cathodic (E(1)pc=-0.73 to -0.76V, E(2)pc=-1.30 to -1.36V), and anodic (E(1)pa=1.02-1.11V, E(2)pa=1.32-1.79V) potential regions. Antibacterial efficacy of complexes have been screened against four Gram (-ve) and two Gram (+ve) bacterial strains. The DNA interaction studies suggest that these complexes bind with CT-DNA by intercalation, giving the binding affinity in the order 1>2>3. All the complexes display significant cleavage activity against circular plasmid pBR322 DNA. Docking simulation was performed to insert complexes into the crystal structure of EGFR tyrosine kinase and B-DNA at active site to determine the probable binding mode.
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Affiliation(s)
- P Arthi
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), Chennai 600 014, India
| | - S Shobana
- Department of Bioinformatics, School of Bioengineering, SRM University, Kattankulathur 603 203, India
| | - P Srinivasan
- Department of Bioinformatics, Alagappa University, Karaikudi 630 003, India
| | - L Mitu
- Department of Chemistry, Faculty of Science, University of Pitesti, Pitesti 110 040, Romania
| | - A Kalilur Rahiman
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), Chennai 600 014, India.
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49
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Balaji J, Prabu S, Xavier JJF, Srinivasan P. Crystal structure of N'-[(E)-(4-chloro-phen-yl)(phen-yl)methyl-idene]-4-methyl-benzene-sulfono-hydrazide. Acta Crystallogr E Crystallogr Commun 2015; 71:o45-o46. [PMID: 25705499 PMCID: PMC4331850 DOI: 10.1107/s2056989014026723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 12/05/2014] [Indexed: 06/04/2023]
Abstract
The title compound, C20H17ClN2O2S, was obtained by a condensation reaction between 4-chloro-benzo-phenone and tosyl hydrazide. The plane of the methyl-substituted benzene ring forms dihedral angles of 20.12 (12) and 78.43 (13)° with those of the chlorine-substituted benzene ring and the benzene ring, respectively, with the last two rings forming a dihedral angle of 67.81 (13)°. The chlorine substituent was also found to be 0.868 (2):0.132 (2) disordered over these two rings. In the crystal, mol-ecules are linked through pairs of N-H⋯O hydrogen bonds, giving centrosymmetric cyclic dimers [graph set R 2 (2)(8)], which are linked by weak C-H⋯O and C-H⋯Cl inter-actions into a chain structure which extends along the a-axis direction.
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Affiliation(s)
- J. Balaji
- Department of Physics, UCEP, Panruti 607 106, TamilNadu, India
| | - S. Prabu
- Department of Physics, UCEP, Panruti 607 106, TamilNadu, India
| | - J. J. F. Xavier
- Department of Chemistry, UCEP, Panruti 607 106, TamilNadu, India
| | - P. Srinivasan
- Department of Physics, UCEP, Panruti 607 106, TamilNadu, India
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50
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Zhao M, Choudhary P, Srinivasan P, Tang H, Heaton N, Fung M, Barthel A, Bornstein SR, Amiel SA, Huang GC. Modification of human islet preparation: an effective approach to improve graft outcome after islet transplantation? Horm Metab Res 2015; 47:72-7. [PMID: 25372780 DOI: 10.1055/s-0034-1390489] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Revascularisation of transplanted islets is an essential prerequisite for graft survival and function. However, current islet isolation procedures deprive the islets of endothelial tubulets. This may have a detrimental effect on the revascularisation process of islets following transplantation. We hypothesise that modification of the isolation procedure that preserves islet endothelial vessels may improve the islet revascularisation process following transplantation. Here, we present a modified islet isolation method by which a substantial amount of endothelial cells still attached to the islets could be preserved. The islets with preserved endothelial cells isolated by this method were revascularised within 3 days, not observed in islets isolated by standard methods. Further, we observed that grafts of islets isolated by standard methods had more patches of dead tissue than islet grafts obtained by the modified method, indicating that attached endothelial cells may play an important role in the islet revascularisation process and potentially help to improve the transplantation outcome.
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Affiliation(s)
- M Zhao
- Department of Diabetes and Endocrinology, Division of Diabetes and Nutrients King's College London, London, UK
| | - P Choudhary
- Department of Diabetes and Endocrinology, Division of Diabetes and Nutrients King's College London, London, UK
| | - P Srinivasan
- Institute of Liver Studies, King's College Hospital, London, UK
| | - H Tang
- Department of Diabetes and Endocrinology, Division of Diabetes and Nutrients King's College London, London, UK
| | - N Heaton
- Institute of Liver Studies, King's College Hospital, London, UK
| | - M Fung
- Department of Diabetes and Endocrinology, Division of Diabetes and Nutrients King's College London, London, UK
| | - A Barthel
- Department of Medicine III, Dresden, Germany
| | - S R Bornstein
- Department of Diabetes and Endocrinology, Division of Diabetes and Nutrients King's College London, London, UK
| | - S A Amiel
- Department of Diabetes and Endocrinology, Division of Diabetes and Nutrients King's College London, London, UK
| | - G C Huang
- Department of Diabetes and Endocrinology, Division of Diabetes and Nutrients King's College London, London, UK
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