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Bhatta BR, Kc SP, Regmi S, Pandey AR, Adhikari B, Gautam G, Baral SC. Climate change and health in Nepal: an urgent need for action. Perspect Public Health 2024; 144:75-77. [PMID: 38497920 DOI: 10.1177/17579139231215022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Affiliation(s)
| | - S P Kc
- HERD International, Nepal
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McMillan C, Adhikari B, Farrell K, Wolk D, Lee E, Crary J, Johnson FB. SHORT TELOMERES ASSOCIATE WITH HYPERPHOSPHORYLATED TAU BURDEN IN PRIMARY AGE-RELATED TAUOPATHY. Innov Aging 2022. [PMCID: PMC9765938 DOI: 10.1093/geroni/igac059.1739] [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: 12/24/2022] Open
Abstract
Aging is a major risk factor for hyperphosphorylated tau burden (p-tau). Telomeres lengths (TL) shorten with age and various sources of DNA damage, thus provide a measure of biological age. Additionally, DNA methylation (DNAm) changes over time and may contribute to changes in TL. We hypothesize that shorter TL will be associated with increased risk of p-tau burden and that this process may be mediated by DNAm. We extracted DNA from frontal cortex of 113 individuals (Age=87.3 + 9.3; 37% Female) that met neuropathological criteria for primary age-related tauopathy (PART), characterized by p-tau in the absence of amyloid pathology. We measured mean TL using qPCR to determine the copy number of telomere repeat DNA in comparison to a single copy gene. We also measured DNA methylation using the Illumina MethylationEPIC Kit for ~850K CpGs. P-tau was measured in medial temporal cortex using an Aperio Digital Pathology Slide Scanner. Linear regression revealed that shorter TL was associated with increased p-tau burden (B=-0.28; p=-.003), including adjustment for age (B=0.003; p=0.003). eWAS identified six CpGs associated with TL (all q< 0.05). Causal mediation analyses identified that two of these CpGs mediate the TL and p-tau association: proportion mediated by cg08701686 (UNC5D) and cg24533059 (near IFNGR1 and OLIG3) was 32.5% and 48.6%, respectively. Shorter TL is associated with increased p-tau pathological burden in PART and may be mediated in part by DNAm at particular loci. These findings support the concept that biological aging, as measured with TL and DNAm, may contribute to tauopathy beyond chronological aging.
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Affiliation(s)
- Corey McMillan
- University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Bandita Adhikari
- University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Kurt Farrell
- Icahn School of Medicine at Mount Sinai, New York City, New York, United States
| | - David Wolk
- University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - PART Working Group
- Icahn School of Medicine at Mount Sinai, New York City, New York, United States
| | - Edward Lee
- University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - John Crary
- Icahn School of Medicine at Mount Sinai, New York City, New York, United States
| | - F Bradley Johnson
- University of Pennsylvania, Philadelphia, Pennsylvania, United States
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McMillan CT, Adhikari B, Farrell KW, Wolk DA, Lee EB, Crary JF, Johnson FB. Short Telomeres Associate with Hyperphosphorylated Tau Burden in Primary Age‐Related Tauopathy. Alzheimers Dement 2022. [DOI: 10.1002/alz.067329] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | | | | | | | - Eddie B Lee
- University of Pennsylvania Philadelphia PA USA
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Ribeiro HA, Vieira LS, Scindia Y, Adhikari B, Wheeler M, Knapp A, Schroeder W, Mehrad B, Laubenbacher R. Multi-scale mechanistic modelling of the host defence in invasive aspergillosis reveals leucocyte activation and iron acquisition as drivers of infection outcome. J R Soc Interface 2022; 19:20210806. [PMID: 35414216 PMCID: PMC9006013 DOI: 10.1098/rsif.2021.0806] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Aspergillus species are ubiquitous environmental moulds, with spores inhaled daily by most humans. Immunocompromised hosts can develop an invasive infection resulting in high mortality. There is, therefore, a pressing need for host-centric therapeutics for this infection. To address it, we created a multi-scale computational model of the infection, focused on its interaction with the innate immune system and iron, a critical nutrient for the pathogen. The model, parameterized using published data, was found to recapitulate a wide range of biological features and was experimentally validated in vivo. Conidial swelling was identified as critical in fungal strains with high growth, whereas the siderophore secretion rate seems to be an essential prerequisite for the establishment of the infection in low-growth strains. In immunocompetent hosts, high growth, high swelling probability and impaired leucocyte activation lead to a high conidial germination rate. Similarly, in neutropenic hosts, high fungal growth was achieved through synergy between high growth rate, high swelling probability, slow leucocyte activation and high siderophore secretion. In summary, the model reveals a small set of parameters related to fungal growth, iron acquisition and leucocyte activation as critical determinants of the fate of the infection.
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Affiliation(s)
- Henrique Al Ribeiro
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of Florida, Gainesville, FL, USA
| | - Luis Sordo Vieira
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of Florida, Gainesville, FL, USA.,Department of Psychiatry, University of Florida, Gainesville, FL, USA
| | - Yogesh Scindia
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of Florida, Gainesville, FL, USA.,Department of Pathology, University of Florida, Gainesville, FL, USA
| | - Bandita Adhikari
- Center for Quantitative Medicine, School of Medicine, University of Connecticut, Farmington, CT, USA
| | - Matthew Wheeler
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of Florida, Gainesville, FL, USA
| | - Adam Knapp
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of Florida, Gainesville, FL, USA
| | | | - Borna Mehrad
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of Florida, Gainesville, FL, USA
| | - Reinhard Laubenbacher
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of Florida, Gainesville, FL, USA
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Kang I, Lee HC, Adhikari B, Ha SD, Kwon YM. Effects of hot water spray and sub-zero saline chilling on bacterial decontamination of broiler carcasses. Poult Sci 2022; 101:101688. [PMID: 35104730 PMCID: PMC8804181 DOI: 10.1016/j.psj.2021.101688] [Citation(s) in RCA: 1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 12/18/2021] [Accepted: 12/24/2021] [Indexed: 02/01/2023] Open
Abstract
Reduction of Salmonella on poultry carcasses is one way to prevent salmonellosis. The purpose of this research was to evaluate the effects of subzero saline chilling (SSC) with/without hot water spray (HWS) on broiler carcasses prior to chilling for bacterial reduction. Eviscerated broiler carcasses were subjected to water immersion chilling (WIC, 0% NaCl/0.5°C) or SSC (4% NaCl/-2.41°C) with/without prior HWS at 71°C for 1 min. Broiler carcasses in SSC were chilled faster than those in WIC, regardless of HWS. The combination of HWS and SSC resulted in the best reduction of mesophilic aerobic bacteria, Escherichia coli, and total coliforms on the carcasses over the WIC, SSC, and HWS/WIC. No Salmonella was detected on the carcasses in SSC and HWS/SSC while Salmonella positive was observed on the carcasses chilled in WIC and HWS/WIC. A trace of Gram-negative genus was detected on carcasses in HWS/SSC while many other microbiomes were observed on those in WIC, SSC, and HWS/WIC when quantitative microbiota profiles of 16S rRNA gene sequences were evaluated. Based on these results, chilling of broiler carcasses in 4% NaCl/-2.41°C after HWS at 71°C for 1 min significantly reduced carcass chilling time and bacterial contamination over the control chilling.
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Affiliation(s)
- I Kang
- Department of Animal Science, California Polytechnic State University, San Luis Obispo, CA 93407, USA.
| | - H C Lee
- Department of Animal Science, California Polytechnic State University, San Luis Obispo, CA 93407, USA
| | - B Adhikari
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
| | - S D Ha
- Department of Food Science and Technology, Chung-Ang University, Ansung, Gyunggido 456-756, Republic of Korea
| | - Y M Kwon
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
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Shrestha A, Shrestha P, Shrestha T, Shrestha RM, Sujakhu D, Dhakal K, Thapa G, Adhikari S, Karki S, Adhikari B. Awareness and Knowledge of Glaucoma and their Associated Factors among People Visiting a Tertiary Level Hospital in Central Nepal. Kathmandu Univ Med J (KUMJ) 2022; 20:56-60. [PMID: 36273292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Background Glaucoma is one of the major causes of irreversible blindness globally. Almost 60 million people globally are affected by glaucoma making it the second leading cause of blindness worldwide. Diagnosis of glaucoma early on is vital for timely management and prevention of blindness. However, it is challenging to diagnose it early because it is asymptomatic in the initial stage, and there is also the dearth of appropriate screening tools. Awareness, knowledge, and beliefs are believed to influence the treatment-seeking behavior of people as well as their uptake of services. Objective To assess the awareness and knowledge about glaucoma among general patients and patient attendants visiting Dhulikhel Hospital. Method We conducted a cross sectional quantitative study among general patients visiting Dhulikhel Hospital. We collected data using face-to-face interviews with semistructured questionnaires. We analyzed data in R version 4.0.3 (2020-10-10). We presented numerical variables as mean and standard deviation whereas categorical variables as frequency and percentage. We determined factors associated with awareness and knowledge of glaucoma using logistic regression analysis and estimated adjusted odds ratio (AOR) with 95% confidence interval. Result Of 379 participants, a total of 214 (56.5%) participants had heard about glaucoma. Out of the participants who heard about glaucoma, the mean knowledge score was 48.3±21.7 and 53.3% had good knowledge on glaucoma. The odds of having heard about glaucoma were two percent lower (AOR=0.98; 95%CI: 0.97-0.99; p-value 0.036) in the older participants compared to one year younger participant, 1.98 (95%CI:1.01-3.86; p-value 0.046) times higher among literates and 2.79 (95%CI: 1.76- 4.41; p-value < 0.001) times among participants with previous ocular examination. The odds of having good knowledge was 1.94 (95%CI: 1.10-3.42; p value 0.021) times among participants with previous ocular examinations. Conclusion The knowledge and awareness regarding glaucoma in a hospital-visiting population in central Nepal was low. Half of the participants were unaware of the disease glaucoma and half of the participants who heard of the glaucoma had poor knowledge on glaucoma.
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Affiliation(s)
- A Shrestha
- Department of Ophthalmology, Dhulikhel Hospital, Kathmandu University Hospital, Dhulikhel, Kavre, Nepal
| | - P Shrestha
- Department of Ophthalmology, Dhulikhel Hospital, Kathmandu University Hospital, Dhulikhel, Kavre, Nepal
| | - T Shrestha
- Department of Ophthalmology, Dhulikhel Hospital, Kathmandu University Hospital, Dhulikhel, Kavre, Nepal
| | - R M Shrestha
- Department of Ophthalmology, Dhulikhel Hospital, Kathmandu University Hospital, Dhulikhel, Kavre, Nepal
| | - D Sujakhu
- Department of Ophthalmology, Dhulikhel Hospital, Kathmandu University Hospital, Dhulikhel, Kavre, Nepal
| | - K Dhakal
- Department of Ophthalmology, Dhulikhel Hospital, Kathmandu University Hospital, Dhulikhel, Kavre, Nepal
| | - G Thapa
- Department of Ophthalmology, Dhulikhel Hospital, Kathmandu University Hospital, Dhulikhel, Kavre, Nepal
| | - S Adhikari
- Department of Ophthalmology, Dhulikhel Hospital, Kathmandu University Hospital, Dhulikhel, Kavre, Nepal
| | - S Karki
- Department of Public Health and Community, Dhulikhel Hospital, Kathmandu University Hospital, Dhulikhel, Kavre, Nepal
| | - B Adhikari
- Department of Public Health and Community, Dhulikhel Hospital, Kathmandu University Hospital, Dhulikhel, Kavre, Nepal
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Gharti BB, Shrestha PM, Shrestha A, Basnet RB, Shah C, Adhikari B. Comparison between Simple and Classical Techniques to Create Closed Pneumoperitoneum. Kathmandu Univ Med J (KUMJ) 2021; 19:309-313. [PMID: 36254415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Background Closed method of pneumoperitoneum using Veress needle is an established technique. Classical closed technique is popular. Simple technique is a modified closed technique. Objective To compare the classical and simple techniques of closed pneumoperitoneum. Method This study was conducted in the department of urology, Bir hospital from August 1st 2019 to March 30th 2021. Total 114 patients were randomized into simple and classical technique of creating closed pneumoperitoneum. Time taken for creation of pneumoperitoneum, complications and failure of creating pneumoperitoneum in each group noted and analyzed. Chi square test, Fischer exact test and student t test were used and p < 0.05 considered significant. Result Among 114 patients, 61 in simple and 53 in classical technique allocated. In simple technique, mean age was 42.98±18.21 years, BMI was 21.84±2.57 kg/m2 , mean time for pneumoperitoneum creation was 108.07±21.14 seconds. In classical technique, mean age was 40.15±17.58 years, BMI was 21.94±2.54 (kg/m2 ), mean time for pneumoperitoneum creation was 189.70±32.21 seconds. Mean time was less in simple technique than classical technique (p < 0.001). Complication rate observed was 6% in each technique (p=0.797) with cumulative rate of 10%. Omental injury was seen in 3.2% in simple technique and 5.6% in classical technique (p=0.662). Retroperitoneal insufflation was seen in 6.5% in simple technique and 5.6% in classical technique (p=0.842). No failed pneumoperitoneum was observed in both groups. Conclusion Simple technique is as effective, reproducible and safe method as classical technique of creating closed pneumoperitoneum.
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Affiliation(s)
- B B Gharti
- Department of Urology, National Academy of Medical Sciences, Bir Hospital, Kathmandu, Nepal
| | - P M Shrestha
- Department of Urology, National Academy of Medical Sciences, Bir Hospital, Kathmandu, Nepal
| | - A Shrestha
- Department of Urology, National Academy of Medical Sciences, Bir Hospital, Kathmandu, Nepal
| | - R B Basnet
- Department of Urology, National Academy of Medical Sciences, Bir Hospital, Kathmandu, Nepal
| | - C Shah
- Department of Urology, National Academy of Medical Sciences, Bir Hospital, Kathmandu, Nepal
| | - B Adhikari
- Department of Urology, National Academy of Medical Sciences, Bir Hospital, Kathmandu, Nepal
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Arreguin-Nava MA, Graham BD, Adhikari B, Agnello M, Selby CM, Hernandez-Velasco X, Vuong CN, Solis-Cruz B, Hernandez-Patlan D, Latorre JD, Tellez G, Hargis BM, Tellez-Isaias G. Evaluation of in ovo Bacillus spp. based probiotic administration on horizontal transmission of virulent Escherichia coli in neonatal broiler chickens. Poult Sci 2020; 98:6483-6491. [PMID: 31549175 PMCID: PMC8913981 DOI: 10.3382/ps/pez544] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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] [Received: 07/11/2019] [Accepted: 09/06/2019] [Indexed: 12/16/2022] Open
Abstract
This study evaluated the effect of in ovo Bacillus spp. base probiotic (BBP) administration on hatchability, Gram-negative bacteria (GNB) recovery, performance, and microbiota composition in 2 independent trials using a virulent E. coli seeder challenge model. In each trial, one hundred and eighty 18-day-old embryos were allocated into 1 of 2 groups: Control and treated group (inoculated with 107 BBP). On day 19 of embryogenesis, seeder embryos (n = 18) were inoculated with 4.5 × 104E. coli/mL+272 μg/mL tetracycline and segregated into mesh hatching bags. Twelve chicks per group were euthanized at hatch and at day 7 to evaluate the gastrointestinal composition of total GNB or total aerobic pasteurized bacteria. Also, in trial 2, ceca content from five chickens at day 7 were collected to evaluate microbiota composition. Embryos inoculated with BBP showed a significant (P < 0.05) reduction in the total number of GNB at day-of-hatch (DOH) and day 7. Probiotic treatment increased BW at DOH and day 7, and BW gain (days 0 to 7) when compared with Control chickens. Proteobacteria phylum was significantly reduced, while the Firmicutes was significantly increased by the BBP as compared to the Control (P < 0.05). At family level, Enterobacteriaceae was significantly decreased, while the Lachnospiraceae was significantly elevated in the BBP as compared to the Control group (P < 0.05). The genus Oscillospira was significantly enriched in the BBP group, whereas the unidentified genus of family Enterobacteriaceae in the Control group (P < 0.05). The BBP group increased the bacterial species richness, although there was no significant difference between treatments (P > 0.05). Interestingly, beta diversity showed a significant difference in bacterial community structure between Control and BBP groups (P < 0.05). The results of the present study suggest that in ovo administration of a BBP can reduce the severity of virulent E. coli horizontal transmission and infection of broiler chickens during hatch. The reduction in the severity of the transmission and infection by the BPP might be achieved through alterations of microbiota composition and its community structure.
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Affiliation(s)
| | - B D Graham
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
| | - B Adhikari
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
| | - M Agnello
- uBiome, Inc, San Francisco 94103, CA
| | - C M Selby
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
| | - X Hernandez-Velasco
- Departamento de Medicina y Zootecnia de Aves, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de Mexico, Mexico City 04510, Mexico
| | - C N Vuong
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
| | - B Solis-Cruz
- Laboratorio 5: LEDEFAR, Unidad de Investigación Multidisciplinaria, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlan Izcalli 54714, Estado de Mexico, Mexico
| | - D Hernandez-Patlan
- Laboratorio 5: LEDEFAR, Unidad de Investigación Multidisciplinaria, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlan Izcalli 54714, Estado de Mexico, Mexico
| | - J D Latorre
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
| | - G Tellez
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
| | - B M Hargis
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
| | - G Tellez-Isaias
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
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Arreguin-Nava M, Graham B, Adhikari B, Agnello M, Selby C, Hernandez-Velasco X, Vuong C, Solis-Cruz B, Hernandez-Patlan D, Latorre J, Tellez G, Hargis B, Tellez-Isaias G. Evaluation of in ovo Bacillus spp. based probiotic administration on horizontal transmission of virulent Escherichia coli in neonatal broiler chickens. Poult Sci 2020. [DOI: 10.1016/j.psj.2020.02.001] [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: 10/24/2022] Open
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10
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Risal P, Adhikari B, Shrestha R, Manandhar S, Bhatt RD, Hada M. Analysis of Factors Associated with Thyroid Dysfunction: A Hospital Based Study. Kathmandu Univ Med J (KUMJ) 2019; 17:88-92. [PMID: 32632053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Background Thyroid dysfunction (TD) is one of the major public health concerns in Nepal. This study intends to identify factors in association with thyroid dysfunction and its hospital based prevalence. Objective To determine hospital-based prevalence of thyroid dysfunction and to identify and analyze factors in association with thyroid dysfunction. Method A retroprospective cross-sectional study was conducted among patients attending Dhulikhel Hospital-Kathmandu University Hospital (DH,KUH) from January to December, 2015 with prospective part carried out from July to December 2015 in the patients visiting Dhulikhel hospital for health check-up and requested for Thyroid Function Tests (TFTs). Thyroid Function Tests of 1530 subjects were performed in the biochemistry laboratory and semi-structured questionnaire were introduced to 312 participants with convenient sampling method and their anthropometric measurements were taken. Chi-square test, Pearson's correlation and student-t test were used as a measure to analyze factors. Result Out of total 1530 subjects, 35.3% were having thyroid dysfunction with the prevalence of overt hyperthyroidism, subclinical hyperthyroidism, overt hypothyroidism and subclinical hypothyroidism to be 2.5%, 2.4%, 5.6% and 24.8% respectively. The distribution of thyroid dysfunction was preponderant among females and among older age. The prevalence of thyroid dysfunction was highest among Terai/Madhesi (40.0%) and lowest among Newars (28.5%) with higher fraction of hypothyroidism in each ethnic group. There were significant correlation between Thyroid Stimulating Hormone (TSH) with waist-hip ratio (p<0.05) and weight (kg) with free thyroxine (fT4) (p<0.05). Direct pesticide exposure (p<0.05) was significantly associated with hypothyroidism. The serum fT4 was significantly different (p<0.05) among vegetarian and non-vegetarian whereas TSH and free triiodothyronine (fT3) were not significantly different. Smoking, alcoholism, dietary food habits, diabetes and hypertension were not significantly associated with thyroid dysfunction. Conclusion Thyroid dysfunction was highly prevalent among participants with higher proportion of subclinical hypothyroidism. Besides, direct pesticide exposure found to be factor in association with hypothyroidism, this study could not find significance relation with other established risk factors.
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Affiliation(s)
- P Risal
- Department of Clinical Biochemistry, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - B Adhikari
- Department of Natural Science-Human Biology, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - R Shrestha
- Department of Natural Science-Human Biology, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - S Manandhar
- Department of Natural Science-Human Biology, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - R D Bhatt
- Department of Clinical Biochemistry, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
| | - M Hada
- Department of Clinical Biochemistry, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
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Dulal N, Shanks R, Chalmers D, Adhikari B, Gill H. Migration and performance of erucamide slip additive in high-density polyethylene bottle caps. J Appl Polym Sci 2018. [DOI: 10.1002/app.46822] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- N. Dulal
- School of Science, RMIT University, 124 La Trobe Street; Melbourne Victoria 3000 Australia
| | - R. Shanks
- School of Science, RMIT University, 124 La Trobe Street; Melbourne Victoria 3000 Australia
| | - D. Chalmers
- Coca-Cola Amatil, Roussell Rd; Eastern Creek New South Wales 2766 Australia
| | - B. Adhikari
- School of Science, RMIT University, Bundoora Campus; Melbourne Victoria 3083 Australia
| | - H. Gill
- School of Science, RMIT University, Bundoora Campus; Melbourne Victoria 3083 Australia
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12
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Ramakrishnan V, Akers J, Nguyen T, Wang A, Adhikari B, Hirshman B, Li J, Sarkaria J, Hua W, Ying M, Nitta M, Jiang T, Carter B, Chen CC. Abstract 1956: miR-181d degradation mediated genetic heterogeneity and acquired resistance. Cancer Res 2018. [DOI: 10.1158/1538-7445.am2018-1956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
When unrepaired, alkylated DNA can induce cell death or trigger mutagenesis. Cellular capacity for repair of these lesions by O6-methylguanine methyltransferase (MGMT) dictates the equilibrium between cell viability and genetic diversity. Treatment of glioblastoma cells with temozolomide (TMZ) induced ATM- and Rad3-related (ATR) kinase dependent polyribonucleotide nucleotidyltransferase 1 (PNPT1) degradation of miR-181d. miR-181d suppresses MGMT expression; its degradation increases the mean MGMT expression of the cell population. miR-181d degradation also magnifies the cell-to-cell variability in MGMT expression, expanding the genetic heterogeneity of the population. This expanded heterogeneity enhances the “fitness” of the population and constitutes a novel form of chemotherapeutic resistance. These effects can be suppressed by overexpression of miR-181d, suggesting miRNA delivery as a strategy for glioblastoma therapy. To characterize the mechanism of acquired resistance, we profiled the expression of 2400 miRNAs before and after TMZ treatment. In independent patient-derived neurosphere lines, the majority of miRNAs remained unchanged after treatment. However, miR-181d was consistently suppressed after TMZ treatment. Our previous work demonstrated miR-181d as the master regulator of MGMT. We confirmed TMZ-induced suppression of miR-181d using independent in vitro and in vivo models as well as matched pre- and post-TMZ treated clinical specimens. TMZ-induced miR-181d suppression persisted after transcriptional inhibition, suggesting degradation as the primary mechanism. We performed an siRNA screen and identified polyribonucleotide nucleotidyltransferase 1 (PNPT1) as the gene responsible for miR-181d degradation. CRISPR inactivation of PNPT1 eliminated TMZ-induced suppression of miR-181d; this was rescued by wild-type PNPT1 but not by PNPT1 harboring RNAse-inactivating mutations. TMZ-induced degradation of miR-181d requires ATR kinase. Silencing or inhibition of ATR eliminated binding of PNPT1 to miR-181d and prevented degradation of miR-181d. TMZ-sensitizing effects of ATR inhibition were reversed by anti-miR-181d, suggesting miR-181d is essential in this process. In addition to elevating the mean MGMT expression of the population, single-cell analysis revealed that miR-181d degradation broadened the cell-to-cell variability in MGMT expression in vitro. In matched clinical pre- and post-TMZ treated specimens, variability in MGMT expression was significantly elevated in post-TMZ samples. This was recapitulated using The Cancer Genome Atlas (TCGA) database. We propose that miR-181d degradation-mediated expansion of genetic heterogeneity enhances the “fitness” of the population, constituting a novel form of chemotherapeutic resistance. These effects are suppressed by miR-181d overexpression, suggesting miRNA delivery as a strategy for glioblastoma therapy.
Citation Format: Valya Ramakrishnan, Johnny Akers, Thien Nguyen, Aaron Wang, Bandita Adhikari, Brian Hirshman, Jie Li, Jann Sarkaria, Wei Hua, Mao Ying, Masayuki Nitta, Tao Jiang, Bob Carter, Clark C. Chen. miR-181d degradation mediated genetic heterogeneity and acquired resistance [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 1956.
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Affiliation(s)
| | - Johnny Akers
- 2University of California San Diego, San Diego, CA
| | - Thien Nguyen
- 2University of California San Diego, San Diego, CA
| | - Aaron Wang
- 2University of California San Diego, San Diego, CA
| | | | | | - Jie Li
- 1University of Minnesota, Minneapolis, MN
| | | | - Wei Hua
- 4Fudan University, Shanghai, China
| | - Mao Ying
- 4Fudan University, Shanghai, China
| | | | - Tao Jiang
- 6Capital Medical University, Beijing, China
| | - Bob Carter
- 2University of California San Diego, San Diego, CA
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Adhikari B, Li J, Brandel MG, Futalan D, Akers J, Deming T, Chen CC, Carter BS. The use of TMZ embedded hydrogels for the treatment of orthotopic human glioma xenografts. J Clin Neurosci 2017; 45:288-292. [PMID: 28867360 DOI: 10.1016/j.jocn.2017.07.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 05/12/2017] [Accepted: 07/21/2017] [Indexed: 01/19/2023]
Abstract
The current treatment of glioblastoma multiforme (GBM) is limited by the restricted arsenal of agents which effectively cross the blood brain barrier (BBB). For example, only a fraction of temozolomide (TMZ) administered systemically is available for therapeutic effect because of the BBB and the instability of TMZ under physiologic conditions. A novel approach to overcome this obstacle is to bypass the BBB and locally deliver chemotherapeutic agents directly to the tumor mass. We have explored the loading of TMZ into a novel hydrogel matrix, which can be delivered in liquid form and then solidifies in situ and releases chemotherapy as the matrix dissolves. Here, we tested the effect of amphiphilic diblock copolypeptide hydrogels (DCHs) of 180-poly-lysine and 20-poly-leucine (K180L20) on TMZ using Glioblastoma models. In both the in vitro model, which involved treatment of a human glioblastoma GSC line suspended as neurospheres, and in vivo using an orthotopic glioma xenograft mouse model, we found that K180L20 could safely enhance the efficacy of TMZ. This technique may offer the opportunity to 'coat' the inner lining of the cavity following glioma resection with a slow-release TMZ and potentially decrease recurrence. Future studies in larger animals are needed to delineate this effect.
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Affiliation(s)
- Bandita Adhikari
- Center for Theoretical and Applied Neuro-Oncology, Moores Cancer Center, Division of Neurosurgery, University of California San Diego, La Jolla, CA 92093, USA.
| | - Jie Li
- Center for Theoretical and Applied Neuro-Oncology, Moores Cancer Center, Division of Neurosurgery, University of California San Diego, La Jolla, CA 92093, USA.
| | - Michael G Brandel
- Center for Theoretical and Applied Neuro-Oncology, Moores Cancer Center, Division of Neurosurgery, University of California San Diego, La Jolla, CA 92093, USA.
| | - Diahnn Futalan
- Center for Theoretical and Applied Neuro-Oncology, Moores Cancer Center, Division of Neurosurgery, University of California San Diego, La Jolla, CA 92093, USA.
| | - Johnny Akers
- Center for Theoretical and Applied Neuro-Oncology, Moores Cancer Center, Division of Neurosurgery, University of California San Diego, La Jolla, CA 92093, USA.
| | - Timothy Deming
- Department of Bioengineering, University of California Los Angeles, Los Angeles, CA 90095-1600, USA; Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA 90095-1600, USA.
| | - Clark C Chen
- Center for Theoretical and Applied Neuro-Oncology, Moores Cancer Center, Division of Neurosurgery, University of California San Diego, La Jolla, CA 92093, USA; Department of Neurosurgery, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Bob S Carter
- Center for Theoretical and Applied Neuro-Oncology, Moores Cancer Center, Division of Neurosurgery, University of California San Diego, La Jolla, CA 92093, USA.
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Shrestha S, Adhikari B, Poudel RS, Thapaliya K, Kharal T, Bastakoti M, Bhatta NK. Knowledge, Attitude and Practice on Hypertension Among Antihypertensive Medication Users. JNMA J Nepal Med Assoc 2016; 55:86-92. [PMID: 28029674] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Abstract
INTRODUCTION Hypertension is growing among the population of Nepal. We aimed to determine the current knowledge, attitude and practice of hypertension among hypertensive patients taking antihypertensive medication in the community of Central Nepal. METHODS A cross-sectional study was conducted among the hypertensive patients in Bharatpur, Chitwan, Nepal from July 2015 to September 2015 using clustered sampling technique. Suitably designed and validated questionnaire of knowledge, attitude and practice on hypertension consisting of 27 questions were used to determine the KAP scores. The difference in the median KAP scores between sex, level of education and duration of hypertension were assessed using Mann-Whitney U test. RESULTS A total of 200 patients met the inclusion criteria and majority of them were male (60%), had received primary education (36%) and had hypertension for ≥5 years (46.5%). The blood pressure ranged from 100-180/60-110 mmHg. The median K, A and P scores were 8 (6), 5 (1) and 6 (3) respectively. K and A were statistically associated with sex both at p<0.001 and level of education (K at p<0.001 and A at p=0.016). CONCLUSIONS The current knowledge, attitude and practice among hypertensive patients using antihypertensive medication can be improved.
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Affiliation(s)
- S Shrestha
- Department of Pharmacy, Shree Medical and Technical College, Bharatpur, Chitwan, Nepal
| | - B Adhikari
- Department of Medicine, Bharatpur District Hospital, Bharatpur, Chitwan, Nepal
| | - R S Poudel
- Department of Hospital Pharmacy, Chitwan Medical College Teaching Hospital, Bharatpur, Nepal
| | - K Thapaliya
- Department of Pharmacy, Shree Medical and Technical College, Bharatpur, Chitwan, Nepal
| | - T Kharal
- Department of Pharmacy, Shree Medical and Technical College, Bharatpur, Chitwan, Nepal
| | - M Bastakoti
- Department of Pharmacy, Shree Medical and Technical College, Bharatpur, Chitwan, Nepal
| | - N K Bhatta
- Department of Pharmacy, Shree Medical and Technical College, Bharatpur, Chitwan, Nepal
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Li J, Taich Z, Goyal A, Gonda D, Akers J, Adhikari B, Patel K, Vandenberg S, Yan W, Bao Z, Carter B, Wang R, Mao Y, Chen C. EPIG-03EPIGENETIC SUPPRESSION OF EGFR SIGNALING IN G-CIMP + GLIOBLASTOMAS. Neuro Oncol 2015. [DOI: 10.1093/neuonc/nov214.03] [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: 11/13/2022] Open
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Gounder P, Bulkow LR, Bruce MG, Hennessy T, Snowball M, Adhikari B, Meltzer M, Spradling P, McMahon BJ. Comparing the Cost-Effectiveness of Two Approaches to Hepatocellular Carcinoma (HCC) Surveillance in Persons with Chronic Hepatitis B (CHB) Virus Infection. Int J Epidemiol 2015. [DOI: 10.1093/ije/dyv097.071] [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: 11/12/2022] Open
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Affiliation(s)
- B. Adhikari
- Cancer Center and Blood Institute, St. Joseph Regional Medical Center, Lewiston, Idaho, USA and
| | - R. M. Dongol
- Cancer Center and Blood Institute, St. Joseph Regional Medical Center, Lewiston, Idaho, USA and
| | - D. Baral
- Department of Internal Medicine, SUNY Upstate Medical University, Syracuse, New York, USA
| | - Y. Hewett
- Cancer Center and Blood Institute, St. Joseph Regional Medical Center, Lewiston, Idaho, USA and
| | - B. K. Shah
- Cancer Center and Blood Institute, St. Joseph Regional Medical Center, Lewiston, Idaho, USA and
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Saha S, Mandal B, Hazra G, Dey A, Chakraborty M, Adhikari B, Mukhopadhyay S, Sadhukhan R. Can agronomic biofortification of zinc be benign for iron in cereals? J Cereal Sci 2015. [DOI: 10.1016/j.jcs.2015.06.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Li J, Taich ZJ, Goyal A, Gonda D, Akers J, Adhikari B, Patel K, Vandenberg S, Yan W, Bao Z, Carter BS, Wang R, Mao Y, Jiang T, Chen CC. Epigenetic suppression of EGFR signaling in G-CIMP+ glioblastomas. Oncotarget 2015; 5:7342-56. [PMID: 25277177 PMCID: PMC4202127 DOI: 10.18632/oncotarget.2350] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The intrinsic signaling cascades and cell states associated with the Glioma CpG Island Methylator Phenotype (G-CIMP) remain poorly understood. Using published mRNA signatures associated with EGFR activation, we demonstrate that G-CIMP+ tumors harbor decreased EGFR signaling using three independent datasets, including the Chinese Glioma Genome Atlas(CGGA; n=155), the REMBRANDT dataset (n=288), and The Cancer Genome Atlas (TCGA; n=406). Additionally, an independent collection of 25 fresh-frozen glioblastomas confirmed lowered pERK levels in G-CIMP+ specimens (p<0.001), indicating suppressed EGFR signaling. Analysis of TCGA glioblastomas revealed that G-CIMP+ glioblastomas harbored lowered mRNA levels for EGFR and H-Ras. Induction of G-CIMP+ state by exogenous expression of a mutated isocitrate dehydrogenase 1, IDH1-R132H, suppressed EGFR and H-Ras protein expression as well as pERK accumulation in independent glioblastoma models. These suppressions were associated with increased deposition of the repressive histone markers, H3K9me3 and H3K27me3, in the EGFR and H-Ras promoter regions. The IDH1-R132H expression-induced pERK suppression can be reversed by exogenous expression of H-RasG12V. Finally, the G-CIMP+ Ink4a-Arf−/− EGFRvIII glioblastoma line was more resistant to the EGFR inhibitor, Gefitinib, relative to its isogenic G-CIMP- counterpart. These results suggest that G-CIMP epigenetically regulates EGFR signaling and serves as a predictive biomarker for EGFR inhibitors in glioblastoma patients.
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Affiliation(s)
- Jie Li
- Center for Theoretical and Applied Neuro-Oncology, Division of Neurosurgery, University of California, San Diego. Contributed equally to this work
| | - Zachary J Taich
- Center for Theoretical and Applied Neuro-Oncology, Division of Neurosurgery, University of California, San Diego. Contributed equally to this work
| | - Amit Goyal
- Center for Theoretical and Applied Neuro-Oncology, Division of Neurosurgery, University of California, San Diego
| | - David Gonda
- Center for Theoretical and Applied Neuro-Oncology, Division of Neurosurgery, University of California, San Diego
| | - Johnny Akers
- Center for Theoretical and Applied Neuro-Oncology, Division of Neurosurgery, University of California, San Diego
| | - Bandita Adhikari
- Center for Theoretical and Applied Neuro-Oncology, Division of Neurosurgery, University of California, San Diego
| | - Kunal Patel
- Center for Theoretical and Applied Neuro-Oncology, Division of Neurosurgery, University of California, San Diego
| | | | - Wei Yan
- Department of Neurosurgery, Tiantan Hospital, Capital Medical University, Beijing, China
| | - Zhaoshi Bao
- Department of Neurosurgery, Tiantan Hospital, Capital Medical University, Beijing, China
| | - Bob S Carter
- Center for Theoretical and Applied Neuro-Oncology, Division of Neurosurgery, University of California, San Diego
| | - Renzhi Wang
- Department of Neurosurgery, Peking Union Medical College Hospital, Beijing, China
| | - Ying Mao
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Tao Jiang
- Department of Neurosurgery, Tiantan Hospital, Capital Medical University, Beijing, China
| | - Clark C Chen
- Center for Theoretical and Applied Neuro-Oncology, Division of Neurosurgery, University of California, San Diego
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Shen N, Qin Y, Wang Q, Liao S, Zhu J, Zhu Q, Mi H, Adhikari B, Wei Y, Huang R. Production of succinic acid from sugarcane molasses supplemented with a mixture of corn steep liquor powder and peanut meal as nitrogen sources by Actinobacillus succinogenes. Lett Appl Microbiol 2015; 60:544-51. [PMID: 25647487 DOI: 10.1111/lam.12399] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 01/13/2015] [Accepted: 01/26/2015] [Indexed: 12/16/2023]
Abstract
The potential of using corn steep liquor powder (CSLP), peanut meal (PM), soybean meal (SM), cotton meal (CM) and urea as the substitute of yeast extract (YE) as the nitrogen source was investigated for producing succinic acid (SA). Actinobacillus succinogenes GXAS137 was used as the fermenting bacterium and sugarcane molasses was used as the main substrate. None of these materials were able to produce SA as high as YE did. The CSLP could still be considered as a feasible and inexpensive alternate for YE as the yield of SA produced using CSLP was second only to the yield of SA obtained by YE. The use of CSLP-PM mixed formulation (CSLP to PM ratio = 2·6) as nitrogen source produced SA up to 59·2 g l(-1) with a productivity of 1·2 g l(-1) h(-1). A batch fermentation using a stirred bioreactor produced up to 60·7 g l(-1) of SA at the same formulation. Fed-batch fermentation that minimized the substrate inhibition produced 64·7 g l(-1) SA. These results suggest that sugarcane molasses supplemented with a mixture of CSLP and PM as the nitrogen source could be used to produce SA more economically using A. succinogenes. Significance and impact of the study: Succinic acid (SA) is commonly used as a platform chemical to produce a number of high value derivatives. Yeast extract (YE) is used as a nitrogen source to produce SA. The high cost of YE is currently the limiting factor for industrial production of SA. This study reports the use of a mixture of corn steep liquor powder (CSLP) and peanut meal (PM) as an inexpensive nitrogen source to substitute YE. The results showed that this CSLP-PM mixed formulation can be used as an effective and economic nitrogen source for the production of SA.
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Affiliation(s)
- N Shen
- Guangxi Key Laboratory of Subtropical Bio-resource Conservation and Utilization, College of Life Science and Technology, Guangxi University, Nanning, Guangxi, China
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, China
| | - Y Qin
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, China
| | - Q Wang
- Guangxi Key Laboratory of Subtropical Bio-resource Conservation and Utilization, College of Life Science and Technology, Guangxi University, Nanning, Guangxi, China
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, China
| | - S Liao
- Guangxi Key Laboratory of Subtropical Bio-resource Conservation and Utilization, College of Life Science and Technology, Guangxi University, Nanning, Guangxi, China
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, China
| | - J Zhu
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, China
| | - Q Zhu
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, China
| | - H Mi
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, China
| | - B Adhikari
- School of Applied Sciences, RMIT University, City Campus, Melbourne, Australia
| | - Y Wei
- Guangxi Key Laboratory of Subtropical Bio-resource Conservation and Utilization, College of Life Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - R Huang
- Guangxi Key Laboratory of Subtropical Bio-resource Conservation and Utilization, College of Life Science and Technology, Guangxi University, Nanning, Guangxi, China
- State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi, China
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Marahatta SB, Adhikari B, Mishra SR, Raut S, Ramasoota P, Malla P, Kaewkungwal J, Singhasivanon P. Association of Previous Smoking Habit and Perceived Social Discrimination with the Risk of Multi-Drug Resistant Tuberculosis in Central Nepal. J Nepal Health Res Counc 2015; 13:95-101. [PMID: 26411721] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
BACKGROUND Multidrug-resistant tuberculosis (MDR TB) caused by Mycobacterium tuberculosis resistant to both Isoniazid and Rifampicin with or without resistant to other drug, is among the most alarming pandemic problem. The objectives of this study was to assess the risk factors of MDR TB in Central Nepal. METHODS A matched case control study was conducted among 186 cases of MDR TB and 372 non-MDR TB controls from central region of Nepal. Pretested questionnaires containing socio-economic, cultural & behavioral; environmental, biological and health service factors were used. Variables significant in bivariate analysis were entered in multiple regression models for further analysis. RESULTS After adjusting for confounders, previous smoking habit (aOR= 4.5,(95%CI(1.24-16.2)) (p=0.04), and perceived social discrimination (aOR=5.83,95%CI (1.77-19.71)) (P=0.021) independently predicted greater MDR TB risk. CONCLUSIONS Encouraging MDR TB cases for smoking cessation through awareness activities should be a priority. Stigma reduction programs should include the empowerment of patients and communities while promoting TBrelated research for further exploration into the risk factors of TB and associated stigma.
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Affiliation(s)
- S B Marahatta
- Department of Community Medicine, Manmohan Memorial Medical College and Teaching Hospital, Kathmandu, Nepal
| | - B Adhikari
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - S R Mishra
- Research and International Relation Division, Manmohan Memorial Institute of Health Sciences, Lalitpur, Nepal
| | - S Raut
- Department of Microbiology, Lumbini Medical College, Palpa, Nepal
| | - P Ramasoota
- Department of Social and Environmental Medicine, Mahidol University, Bangkok, Thailand
| | - P Malla
- National Tuberculosis Centre, Bhaktapur, Nepal
| | - J Kaewkungwal
- Department of Tropical Hygiene, Mahidol University, Bangkok, Thailand
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Kumar A, Dwivedi S, Singh RP, Chakrabarty D, Mallick S, Trivedi PK, Adhikari B, Tripathi RD. Evaluation of amino acid profile in contrasting arsenic accumulating rice genotypes under arsenic stress. Biol plant 2014; 58:733-742. [DOI: 10.1007/s10535-014-0435-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
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Sapkota B, Adhikari B, Upadhaya C. A study of assessment of partial edentulous patients based on Kennedy's classification at Dhulikhel Hospital Kathmandu University Hospital. Kathmandu Univ Med J (KUMJ) 2014; 11:325-7. [PMID: 24899329 DOI: 10.3126/kumj.v11i4.12542] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND Oral health contributes significantly towards quality of life(QOL). Edentulousness falls in a special category among the various conditions of dental origin. Dietary intake and nutritional status is affected by poor oral health and loss of teeth. This will ultimately compromise general health. OBJECTIVE To identify the frequency of Kennedy's classification among partial edentulous patients and to compare occurrence among gender and between upper and lower arches and also to compare edentulousness among employed and unemployed population. METHODS This study was carried out at Dhulikhel Hospital Dental Department. The study was conducted randomly among 194 patients in dental OPD who were partially edentulous. A structured pro forma was used to find out the edentulousness based on Kennedy,s classification. RESULTS Among the Kennedy's classification ClassIII was found to be most common. Among them females and unemployed group were found to have more edentulousness and upper arch was more common. It was also found that females were more conscious and get the replacement of missing teeth among which those having Class IV missing were replaced most often. CONCLUSION The Kennedy Class III partial edentulousness type is most commonly found in this study.
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Affiliation(s)
- B Sapkota
- Department of Dentistry, Dhulikhel Hospital- Kathmandu University Hospital Kathmandu University School of medical Science, Dhulikhel, Kavre, Nepal
| | - B Adhikari
- Department of Dentistry, Dhulikhel Hospital- Kathmandu University Hospital Kathmandu University School of medical Science, Dhulikhel, Kavre, Nepal
| | - C Upadhaya
- Department of Dentistry, Dhulikhel Hospital- Kathmandu University Hospital Kathmandu University School of medical Science, Dhulikhel, Kavre, Nepal
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Joshi M, Aldred P, Panozzo J, Kasapis S, Adhikari B. Rheological and microstructural characteristics of lentil starch–lentil protein composite pastes and gels. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2013.05.016] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Abstract
BACKGROUND Psychological stress is common in medical school and associated with depression. Medical education is grooming in Nepal, but only few studies are done concerning mental health of medical students. OBJECTIVE To assess the prevalence of depression among medical students at different levels of education and find about their stressors. METHODS A cross sectional, questionnaire-based survey was carried out among the undergraduate medical students of B.P.Koirala Institute of Health Sciences, Nepal. 50 students each from Bachelor of Medicine and Bachelor of Surgery (MBBS) first and third year were enrolled in the study conducted between November 2008 to January 2009. The depression levels were assessed using Zung depression scale. Students were asked to complete the questionnaire and then the depression levels calculated .The stress inducing factors during their course of medical education were also assessed. RESULTS The overall prevalence of depression among the students was 29.78 percent. The prevalence of depression in first and third year was 36.74and 22.22 percent respectively. The prevalence of depression was 32.43 percent among female students versus 28.07 percent in male students. Both first and third year students gave high ratings to academic stress and hectic lifestyle as the main stress inducing factors. CONCLUSION The prevalence of depression is seen especially in the first year medical students. So, attempts should be made to alleviate the stressors right from the time they join medical school. Since academic stress proved to be one of the major factors, measures to make the academic curriculum more student-friendly are suggested.
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Affiliation(s)
- B Basnet
- Department of Psychiatry, B.P.Koirala Institute of Health Sciences, Dharan, Nepal.
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Adhikari B, Shrestha K, Kaehler N, Raut S, Chapman RS. Community attitudes towards leprosy affected persons in Pokhara municipality of western Nepal. J Nepal Health Res Counc 2013; 11:264-268. [PMID: 24908528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Stigma is a social process of interpretation of an attribute. Leprosy has been seen as the epitome of stigmatization. The psychosocial impact a person has to bear in a society after the diagnosis weighs heavier than the physical afflictions it causes, which does not get cured with the mere medical treatment. There are various factors which construct the perception of stigma in both leprosy affected persons and unaffected persons. The main purpose of this study was to determine the level of perceived stigma and the risk factors contributing to it among community people living in ward 15, Pokhara municipality. METHODS Cross-sectional descriptive study among 281 community people above the age of 18 years was conducted. Two sets of questionnaire form with additional Explanatory Model Interview Catalogue (EMIC) for each individual were used. RESULTS Among 281 community people, the median score of perceived stigma was 12 while it ranged from 0-30. Ethnic groups, Brahmins, Dalits and minorities had highest perceived stigma score of 15 and above compared to the rest (p=0.001), community people living at the distance more than 2 km had highest perceived stigma score of 15 compared to those living closer to the hospital (p=0.019) and nuclear family had highest perceived stigma score of 15 compared to the joint family (p=0.014). People who lacked information on leprosy had higher score of perceived stigma compared to those who had information on leprosy (p=0.002).Similarly, those who perceived leprosy to be difficult to treat (p<0.001) and a severe disease (p<0.001) had highest score of perceived stigma. CONCLUSIONS Stigma in leprosy was found highly associated with the lack of information about leprosy and their perception in treatment and disease severity. Stigma reduction strategies should focus on health education, targeting to alleviate their perception about the disease with their active participation.
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Affiliation(s)
- B Adhikari
- Nepal Community Health and Development Centre, Kathmandu, Nepal
| | - K Shrestha
- Nepal Community Health and Development Centre, Kathmandu, Nepal
| | - N Kaehler
- Kanchanaburi Polyclinic, Kanchanaburi, Thailand
| | - S Raut
- Department of Microbiology, Manipal College of Medical Sciences, Pokhara, Nepal
| | - R S Chapman
- College of Public Health Sciences, Chulalongkorn University, Bangkok, Thailand
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Cheng XF, Zhang M, Adhikari B. The inactivation kinetics of polyphenol oxidase in mushroom (Agaricus bisporus) during thermal and thermosonic treatments. Ultrason Sonochem 2013; 20:674-9. [PMID: 23102768 DOI: 10.1016/j.ultsonch.2012.09.012] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 09/26/2012] [Accepted: 09/28/2012] [Indexed: 05/23/2023]
Abstract
The effect of thermal and thermosonic treatments on the inactivation kinetics of polyphenol oxidase (PPO) in mushroom (Agaricus bisporus) was studied in 55-75°C temperature range. In both the processes, the inactivation kinetics of PPO followed a first-order kinetics (R(2)=0.941-0.989). The D values during thermal inactivation varied from 112±8.4min to 1.2±0.07min while they varied from 57.8±6.1min to 0.88±0.05min during thermosonic inactivation at the same temperature range. The activation energy during thermal inactivation was found to be 214±17kJ/mol, while it was 183±32kJ/mol during thermosonic inactivation. The inactivating effect of combined ultrasound and heat was found to synergistically enhance the inactivation kinetics of PPO. The D values of PPO decreased by 1.3-3 times during thermosonic inactivation compared to the D values of PPO during thermal inactivation at the temperature range. Therefore, thermosonication can be further developed as an alternative to "hot break" process of mushroom.
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Affiliation(s)
- X-f Cheng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
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Joshi M, Aldred P, McKnight S, Panozzo JF, Kasapis S, Adhikari R, Adhikari B. Physicochemical and functional characteristics of lentil starch. Carbohydr Polym 2012; 92:1484-96. [PMID: 23399180 DOI: 10.1016/j.carbpol.2012.10.035] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 10/11/2012] [Accepted: 10/12/2012] [Indexed: 10/27/2022]
Abstract
The physicochemical properties of lentil starch were measured and linked up with its functional properties and compared with those of corn and potato starches. The amylose content of lentil starch was the highest among these starches. The crystallinity and gelatinization enthalpy of lentil starch were the lowest among these starches. The high amylose: amylopectin ratio in lentil starch resulted into low crystallinity and gelatinization enthalpy. Gelatinization and pasting temperatures of lentil starch were in between those of corn and potato starches. Lentil starch gels showed the highest storage modulus, gel strength and pasting viscosity than corn and potato starch gels. Peleg's model was able to predict the stress relaxation data of these starches well (R(2)>0.98). The elastic modulus of lentil starch gel was less frequency dependent and higher in magnitude at high temperature (60 °C) than at lower temperature (10 °C). Lentil starch is suitable where higher gel strengthened pasting viscosity are desired.
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Affiliation(s)
- M Joshi
- School of Health Sciences, University of Ballarat, Mount Helen, VIC 3353, Australia
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Joshi M, Adhikari B, Aldred P, Panozzo J, Kasapis S. Physicochemical and functional properties of lentil protein isolates prepared by different drying methods. Food Chem 2011. [DOI: 10.1016/j.foodchem.2011.05.131] [Citation(s) in RCA: 141] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Chowdhury SR, Manna S, Saha P, Basak RK, Sen R, Roy D, Adhikari B. Composition analysis and material characterization of an emulsifying extracellular polysaccharide (EPS) produced by Bacillus megaterium RB-05: a hydrodynamic sediment-attached isolate of freshwater origin. J Appl Microbiol 2011; 111:1381-93. [PMID: 21973188 DOI: 10.1111/j.1365-2672.2011.05162.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
AIMS This work was aimed to isolate, purify and characterize an extracellular polysaccharide (EPS) produced by a freshwater dynamic sediment-attached micro-organism, Bacillus megaterium RB-05, and study its emulsifying potential in different hydrocarbon media. METHODS AND RESULTS Bacillus megaterium RB-05 was found to produce EPSs in glucose mineral salts medium, and maximum yield (0.864 g l(-1) ) was achieved after 24-h incubation. The recovery rates of the polysaccharide material by ion-exchange and gel filtration chromatography were around 67 and 93%, respectively. As evident from HPLC and FT-IR analyses, the polysaccharide was found to be a heteropolymer-containing glucose, galactose, mannose, arabinose, fucose and N-acetyl glucosamine. Different oligosaccharide combinations namely hexose(3), hexose(4), hexose(5) deoxyhexose(1) and hexose(5) deoxyhexose(1) pentose(3) were obtained after partial hydrolysis of the polymer using MALDI-ToF-MS. The polysaccharide with an average molecular weight of 170 kDa and thermal stability up to 180°C showed pseudoplastic rheology and significant emulsifying activity in hydrocarbon media. CONCLUSIONS Isolated polysaccharide was found to be of high molecular weight and thermally stable. The purified EPS fraction was composed of hexose, pentose and deoxyhexose sugar residues, which is a rare combination for bacterial polysaccharides. Emulsifying property was either better or comparable to that of other commercially available natural gums and polysaccharides. SIGNIFICANCE AND IMPACT OF THE STUDY This is probably one of the few reports about characterizing an emulsifying EPS produced by a freshwater sediment-attached bacterium. The results of this study contribute to understand the influence of chemical composition and material properties of a new microbial polysaccharide on its application in industrial biotechnology. Furthermore, this work reconfirms freshwater dynamic sediment as a potential habitat for bioprospecting extracellular polymer-producing bacteria. This study will improve our knowledge on the exploitation of a nonconventional renewable resource, which also seems to be ecologically significant.
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Affiliation(s)
- S R Chowdhury
- Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur, WB, India
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31
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Jayasundera M, Adhikari B, Adhikari R, Aldred P. The effect of protein types and low molecular weight surfactants on spray drying of sugar-rich foods. Food Hydrocoll 2011. [DOI: 10.1016/j.foodhyd.2010.07.021] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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32
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Dwivedi S, Tripathi RD, Tripathi P, Kumar A, Dave R, Mishra S, Singh R, Sharma D, Rai UN, Chakrabarty D, Trivedi PK, Adhikari B, Bag MK, Dhankher OP, Tuli R. Arsenate exposure affects amino acids, mineral nutrient status and antioxidants in rice (Oryza sativa L.) genotypes. Environ Sci Technol 2010; 44:9542-9. [PMID: 21077666 DOI: 10.1021/es101716h] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Simulated pot experiments were conducted on four rice (Oryza sativa L.) genotypes (Triguna, IR-36, PNR-519, and IET-4786) to examine the effects of As(V) on amino acids and mineral nutrient status in grain along with antioxidant response to arsenic exposure. Rice genotypes responded differentially to As(V) exposure in terms of amino acids and antioxidant profiles. Total amino acid content in grains of all rice genotypes was positively correlated with arsenic accumulation. While, most of the essential amino acids increased in all cultivars except IR-36, glutamic acid and glycine increased in IET-4786 and PNR-519. The level of nonprotein thiols (NPTs) and the activities of superoxide dismutase (SOD; EC 1.15.1.1), glutathione reductase (GR; EC 1.6.4.2) and ascorbate peroxidase (APX; EC 1.11.1.11) increased in all rice cultivars except IET-4786. A significant genotypic variation was also observed in specific arsenic uptake (SAU; mg kg(-1)dw), which was in the order of Triguna (134) > IR-36 (71) > PNR-519 (53) > IET-4786 (29). Further, application of As(V) at lower doses (4 and 8 mg L(-1) As) enhanced the accumulation of selenium (Se) and other nutrients (Fe, P, Zn, and S), however, higher dose (12 mg L(-1) As) limits the nutrient uptake in rice. In conclusion, low As accumulating genotype, IET-4786, which also had significantly induced level of essential amino acids, seems suitable for cultivation in moderately As contaminated soil and would be safe for human consumption.
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Affiliation(s)
- S Dwivedi
- National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow-226001, India
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Dwivedi S, Tripathi RD, Srivastava S, Singh R, Kumar A, Tripathi P, Dave R, Rai UN, Chakrabarty D, Trivedi PK, Tuli R, Adhikari B, Bag MK. Arsenic affects mineral nutrients in grains of various Indian rice (Oryza sativa L.) genotypes grown on arsenic-contaminated soils of West Bengal. Protoplasma 2010; 245:113-24. [PMID: 20490609 DOI: 10.1007/s00709-010-0151-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2010] [Accepted: 04/14/2010] [Indexed: 05/13/2023]
Abstract
The exposure of paddy fields to arsenic (As) through groundwater irrigation is a serious concern that may not only lead to As accumulation to unacceptable levels but also interfere with mineral nutrients in rice grains. In the present field study, profiling of the mineral nutrients (iron (Fe), phosphorous, zinc, and selenium (Se)) was done in various rice genotypes with respect to As accumulation. A significant genotypic variation was observed in elemental retention on root Fe plaque and their accumulation in various plant parts including grains, specific As uptake (29-167 mg kg(-1) dw), as well as As transfer factor (4-45%). Grains retained the least level of As (0.7-3%) with inorganic As species being the dominant forms, while organic As species, viz., dimethylarsinic acid and monomethylarsonic acid, were non-detectable. In all tested varieties, the level of Se was low (0.05-0.12 mg kg(-1) dw), whereas that of As was high (0.4-1.68 mg kg(-1) dw), considering their safe/recommended daily intake limits, which may not warrant their human consumption. Hence, their utilization may increase the risk of arsenicosis, when grown in As-contaminated areas.
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Affiliation(s)
- Sanjay Dwivedi
- National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow, 226 001, Uttar Pradesh, India
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Kar P, Pradhan NC, Adhikari B. Isomeric Effects on Structures and Properties of Polyaminophenols Synthesized in Basic Medium. Journal of Macromolecular Science, Part A 2010. [DOI: 10.1080/10601320903527137] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Adhikari B, Besser T, Gay J, Fox L, Davis M, Cobbold R, Berge A, McClanahan R, Hancock D. Introduction of new multidrug-resistant Salmonella enterica strains into commercial dairy herds. J Dairy Sci 2009; 92:4218-28. [DOI: 10.3168/jds.2008-1493] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Adhikari B, Besser T, Gay J, Fox L, Davis M, Cobbold R, Berge A, Hancock D. The role of animal movement, including off-farm rearing of heifers, in the interherd transmission of multidrug-resistant Salmonella. J Dairy Sci 2009; 92:4229-38. [DOI: 10.3168/jds.2008-1494] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Adhikari B, Howes T, Wood B, Bhandari B. The effect of low molecular weight surfactants and proteins on surface stickiness of sucrose during powder formation through spray drying. J FOOD ENG 2009. [DOI: 10.1016/j.jfoodeng.2009.01.022] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
This paper attempts to find a strategy to provide year-round irrigation for cultivating three crops per year in the southern plains of the country taking a case study of the Babai basin. Despite having enough flows during the summer for growing rice in total 27,000 ha area, the dry season flows of the Babai river can irrigate only 6,300 ha in winter and 4,000 ha in spring limiting the cropping intensity to 138.50%. It is proposed to irrigate the 7,500 ha southern dry area at the right bank bringing water from a large snow-fed river: the Karnali. Water balance study of the three irrigation regions to be irrigated from the Babai source preserving their existing water rights showed that the year-round irrigation at the west with the proposed arrangement will fall short of only 13.9 million m(3) water volume. At the east side, the head reach area and the tail portion will fall short of 19.4 and 66.4 million m(3) of water to insure a cropping intensity of 250%. The deficits can be fulfilled by means of capturing the excess river water of rainy season in local reservoirs and by making conjunctive use of groundwater. The proposed solution is financially, environmentally and socially viable being a cost effective, user friendly and should be the linchpin towards attaining a sustainable year-round irrigation in the region.
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Affiliation(s)
- B Adhikari
- Department of Civil Engineering, Hydraulics Laboratory, Ghent University, Ghent 9000, Belgium.
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Adhikari B, Verhoeven R, Troch P. Appropriate rehabilitation strategy for a traditional irrigation supply system: a case from the Babai area in Nepal. Water Sci Technol 2009; 60:2819-2828. [PMID: 19934503 DOI: 10.2166/wst.2009.721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This paper studies primary canals of three traditional irrigation systems in the southern plains of Nepal. It offers a scientific interpretation of the indigenous technology applied to the systems, which facilitates to use the same channel network for irrigation, drainage and flood management. The flood management technology of the farmers by diverting as much discharge as possible to the field channels results in the reduction of discharge towards the downstream part of the main channel. It is depicted in the simulation study that uses the river analysis program HEC-RAS 4.0. A cascade of weirs is found to be the most cost effective and user-friendly option to upgrade these systems preserving the existing irrigation, drainage as well as flood management functions. This study suggests that the conventional irrigation design principles should be applied very cautiously with full knowledge of the existing socio-institutional setting, hydro-ecological regime and indigenous technology for upgrading any traditional irrigation system successfully. The indigenous flood management technology strengthens the emerging concept that the floods in the Ganges plain are to be managed, not controlled.
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Affiliation(s)
- B Adhikari
- Hydraulics Laboratory, Department of Civil Engineering, Ghent University, Sint-Pietersnieuwstraat 41, 9000, Ghent, Belgium.
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Adhikari B, Howes T, Shrestha A, Bhandari B. Effect of surface tension and viscosity on the surface stickiness of carbohydrate and protein solutions. J FOOD ENG 2007. [DOI: 10.1016/j.jfoodeng.2006.04.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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41
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Loulou T, Adhikari B, Lecomte D. Estimation of concentration-dependent diffusion coefficient in drying process from the space-averaged concentration versus time with experimental data. Chem Eng Sci 2006. [DOI: 10.1016/j.ces.2006.07.026] [Citation(s) in RCA: 18] [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: 11/26/2022]
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Das T, Banthia AK, Adhikari B, Jeong H, Ha CS, Alam S. The effect of glass fiber and coupling agents in the blends of silicone rubber and liquid crystalline polymers. Macromol Res 2006. [DOI: 10.1007/bf03219081] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [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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Affiliation(s)
- A. Nzihou
- Ecole Des Mines d'Albi-Carmaux, Centre Energetique - Environnement, LGPSD, UMR CNRS 2392, Campus Jarlard, 81013 Albi Cedex 09, France, Environmental-Chemical Engineering, University of Queensland, St. Lucia, 4072 Brisbane, Australia, and New Jersey Center for Engineered Particulates, New Jersey Institute of Technology, Newark, New Jersey 07102
| | - B. Adhikari
- Ecole Des Mines d'Albi-Carmaux, Centre Energetique - Environnement, LGPSD, UMR CNRS 2392, Campus Jarlard, 81013 Albi Cedex 09, France, Environmental-Chemical Engineering, University of Queensland, St. Lucia, 4072 Brisbane, Australia, and New Jersey Center for Engineered Particulates, New Jersey Institute of Technology, Newark, New Jersey 07102
| | - R. Pfeffer
- Ecole Des Mines d'Albi-Carmaux, Centre Energetique - Environnement, LGPSD, UMR CNRS 2392, Campus Jarlard, 81013 Albi Cedex 09, France, Environmental-Chemical Engineering, University of Queensland, St. Lucia, 4072 Brisbane, Australia, and New Jersey Center for Engineered Particulates, New Jersey Institute of Technology, Newark, New Jersey 07102
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Adhikari B, Howes T, Lecomte D, Bhandari B. A glass transition temperature approach for the prediction of the surface stickiness of a drying droplet during spray drying. POWDER TECHNOL 2005. [DOI: 10.1016/j.powtec.2004.11.007] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
AIM To investigate the role of free-living animals such as sparrows, rodents and flies as potential reservoirs of Campylobacter spp on a dairy farm, and to assess the genetic diversity among Campylobacter isolates from the farm and an urban source. METHODS A total of 290 samples (bovine, passerine and rodent faeces, and whole flies) were collected from a large commercial dairy farm in the Manawatu district in New Zealand, and from faeces from urban sparrows in a nearby city. Other samples collected from the dairy farm included five from silage, two from aprons worn by workers during milking, two from workers' boots and two from water in troughs in a paddock. Isolates of thermophilic Campylobacter spp were identified morphologically and phenotypically and further characterised molecularly using pulsed-field gel electrophoresis (PFGE) and the restriction enzyme SmaI. RESULTS Campylobacter jejuni was the only Campylobacter species isolated from all samples. The highest prevalence was found in faeces from dairy cows (54%), followed by faeces from sparrows from the urban area (40%) and the farm (38%), and from rodents (11%) and whole flies (9%). Other samples from the farm environment such as silage, trough water, and workers' aprons and boots were also positive for C. jejuni. Of the 22 restriction patterns obtained, seven were common to more than one source. CONCLUSIONS Cattle, sparrows, rodents and flies are potential reservoirs of C. jejuni on dairy farms. Identical clones of C. jejuni carried by cattle, sparrows, flies and rodents probably indicate a common source of infection. The high level of asymptomatic carriage of C. jejuni by healthy dairy cows could be sufficient to maintain infections within the dairy farm surroundings via environmental contamination.
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Affiliation(s)
- B Adhikari
- Institute of Veterinary Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
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Affiliation(s)
- A. Nzihou
- Ecole Des Mines d'Albi-Carmaux, Centre Energétique et Environnement, LGPSD, UMR CNRS 2392, Campus Jarlard, 81013 Albi Cedex 09, France
| | - B. Adhikari
- Ecole Des Mines d'Albi-Carmaux, Centre Energétique et Environnement, LGPSD, UMR CNRS 2392, Campus Jarlard, 81013 Albi Cedex 09, France
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Adhikari B, Howes T, Bhandari B, Yamamoto S, Truong V. Application of a simplified method based on regular regime approach to determine the effective moisture diffusivity of mixture of low molecular weight sugars and maltodextrin during desorption. J FOOD ENG 2002. [DOI: 10.1016/s0260-8774(01)00203-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Adhikari B, Howes T, Bhandari BR, Truong V. STICKINESS IN FOODS: A REVIEW OF MECHANISMS AND TEST METHODS. International Journal of Food Properties 2001. [DOI: 10.1081/jfp-100002186] [Citation(s) in RCA: 224] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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50
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Ghosh SN, Ghosh AK, Adhikari B, Maiti S. Characterization of a Flame Retardant Plant Polymer and its Influence on the Properties of Rubber Vulcanizate. INT J POLYM MATER PO 2001. [DOI: 10.1080/00914030008048380] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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