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A Bird's-Eye Perspective: An Unusual Case of Very Late-Onset Schizophrenia-Like Psychosis With Visual Hallucinations Included in Its Manifestations Versus the Dementia Prodrome. Cureus 2024; 16:e57510. [PMID: 38707040 PMCID: PMC11066694 DOI: 10.7759/cureus.57510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 04/02/2024] [Indexed: 05/07/2024] Open
Abstract
Very late-onset schizophrenia-like psychosis (VLOSLP) is still a paradox; certain characteristics such as episodic progression of psychosis including delusions and hallucinations involving various modalities, as well as the absence of negative symptoms, are strongly predictive of VLOSLP. We describe an interesting case of a 61-year-old male who presented with a second episode of psychosis along with mild to moderate cognitive impairment like having difficulty in buttoning for over eight months at our tertiary care hospital. Previously, during the first episode, he was treated by a private practitioner; adequate doses for an adequate duration of two atypical antipsychotics were given; and up to 25% global improvement was reported by the caregiver. During the current episode, he experienced delusions, in which he had a conviction that a "WIFI" was capable of "thought-making" functions. During the past four months, his delusions exacerbated and were accompanied by hallucinations of other modalities, like visual and kinesthetic hallucinations, which profoundly impacted his daily life. He used to hear voices. While listening to the voices, he also experienced voices coming out of his mouth. All these were experienced by him in clear consciousness daily for a few hours. All plausible medical causes of late-onset psychosis, such as neuroinflammatory/immunological disorders, were ruled out. Neuroimaging revealed T2-weighted image (T2WI)/fluid-attenuated inversion recovery (FLAIR) hyperintensity in bilateral subcortical and periventricular deep white matter, suggestive of small vessel ischemic changes in the brain. The diagnosis of VLOSLP is completely rationalized by evidence-based medicine. Hence, the role of cerebrovascular risk factors, as well as age-related neurobiological processes, in the pathogenesis of VLOSLP is discussed. Future research ought to emphasize identifying a particular biomarker that would be highly predictive for accurately diagnosing VLOSLP and giving it an identity to separate it from various overlapping clinical conditions such as dementia with Lewy bodies (DLB) and other types of dementia with psychosis so that the patient can be given specific treatment.
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Journey of Marijuana From "Folk Tales" to "Doors of Justice": A Comprehensive Review. Cureus 2024; 16:e57190. [PMID: 38681315 PMCID: PMC11056232 DOI: 10.7759/cureus.57190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 03/29/2024] [Indexed: 05/01/2024] Open
Abstract
This comprehensive review delves into the intricate journey of marijuana in India, tracing its historical and cultural significance from ancient times to the present day. Despite its deep-rooted presence in religious rituals, traditional medicine, and cultural festivities, marijuana faces stringent prohibition under the Narcotic Drugs and Psychotropic Substances Act 1985. This review critically examines the current legal framework, highlighting its societal impacts and limitations. Through an evidence-based analysis, it advocates for a reevaluation of marijuana laws to align with contemporary realities, promoting public health, social equity, and economic development. By envisioning a future of evidence-based regulation and innovation, India can unlock the full potential of marijuana as a "miracle crop" for the betterment of its people and society.
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An efficient multi-class classification of skin cancer using optimized vision transformer. Med Biol Eng Comput 2024; 62:773-789. [PMID: 37996627 DOI: 10.1007/s11517-023-02969-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 11/07/2023] [Indexed: 11/25/2023]
Abstract
Skin cancer is a pervasive and deadly disease, prompting a surge in research efforts towards utilizing computer-based techniques to analyze skin lesion images to identify malignancies. This paper introduces an optimized vision transformer approach for effectively classifying skin tumors. The methodology begins with a pre-processing step aimed at preserving color constancy, eliminating hair artifacts, and reducing image noise. Here, a combination of techniques such as piecewise linear bottom hat filtering, adaptive median filtering, Gaussian filtering, and an enhanced gradient intensity method is used for pre-processing. Afterwards, the segmentation phase is initiated using the self-sparse watershed algorithm on the pre-processed image. Subsequently, the segmented image is passed through a feature extraction stage where the hybrid Walsh-Hadamard Karhunen-Loeve expansion technique is employed. The final step involves the application of an improved vision transformer for skin cancer classification. The entire methodology is implemented using the Python programming language, and the International Skin Imaging Collaboration (ISIC) 2019 database is utilized for experimentation. The experimental results demonstrate remarkable performance with the different performance metrics is accuracy 99.81%, precision 96.65%, sensitivity 98.21%, F-measure 97.42%, specificity 99.88%, recall 98.21%, Jaccard coefficient 98.54%, and Mathew's correlation coefficient (MCC) 98.89%. The proposed methodology outperforms the existing methodology.
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Bridging the Gap: A Holistic View of Personality Factors in Individuals With and Without Alcohol Use. Cureus 2024; 16:e53935. [PMID: 38468987 PMCID: PMC10925557 DOI: 10.7759/cureus.53935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 02/09/2024] [Indexed: 03/13/2024] Open
Abstract
This comprehensive review examines the intricate interplay between personality factors and alcohol use, shedding light on the dynamic relationship that shapes the initiation, progression, and outcomes of alcohol-related behaviors. The exploration encompasses vital personality traits such as sensation seeking, impulsivity, neuroticism, extroversion, agreeableness, conscientiousness, and openness to experience. The bidirectional nature of this association is underscored, emphasizing how personality influences and is influenced by alcohol consumption patterns. Protective personality factors, including resilience, emotional regulation, and social support, are identified as crucial elements in mitigating the risk of alcohol use disorders (AUDs). The implications for clinical practice advocate for tailored interventions that address individual personality profiles, while policy considerations highlight the need for targeted prevention efforts that acknowledge the diverse ways individuals respond to alcohol use. Furthermore, a call for future research emphasizes emerging perspectives, improved methodologies, and ongoing exploration of intervention strategies to advance our understanding of this complex relationship and refine approaches for prevention and treatment. As we navigate this evolving field, the insights gleaned hold promise for shaping more compelling and nuanced interventions to address the diverse needs of individuals affected by AUDs.
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Navigating the Shadows: A Comprehensive Review of Suicide in the Geriatric Population. Cureus 2024; 16:e53352. [PMID: 38435868 PMCID: PMC10907885 DOI: 10.7759/cureus.53352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 01/31/2024] [Indexed: 03/05/2024] Open
Abstract
This review critically examines the complex landscape of suicide within the geriatric population, defined as individuals aged 65 and older. By synthesizing existing research, we elucidate critical findings related to the prevalence, risk factors, and challenges associated with suicide in this demographic. Social isolation, mental health issues, and the intricate psychosocial dimensions of ageing emerge as pivotal factors contributing to the vulnerability of older individuals. The conclusion underscores a compelling call to action, urging collaborative efforts from healthcare professionals, policymakers, and communities to implement targeted prevention strategies. Our vision for the future involves building a supportive and resilient community for the geriatric population, emphasizing age-friendly policies, robust social support networks, and destigmatizing mental health discussions. Through this comprehensive exploration, we aim to contribute to a deeper understanding of suicide in the geriatric population and inspire effective interventions that prioritize the well-being and dignity of older individuals.
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Exploring Body Image Dissatisfaction and Psychiatric Co-morbidities in Rural India: A Comprehensive Review. Cureus 2024; 16:e53123. [PMID: 38420065 PMCID: PMC10899117 DOI: 10.7759/cureus.53123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 01/28/2024] [Indexed: 03/02/2024] Open
Abstract
This comprehensive review examines the intricate landscape of body image dissatisfaction (BID) in rural India, shedding light on the multifaceted factors influencing individual perceptions and societal expectations. Delving into cultural nuances, economic disparities, and gender-specific experiences, the study highlights the pervasive nature of BID across diverse age groups. Unveiling the complex interplay between BID and psychiatric co-morbidities, such as depression and anxiety, underscores the urgency of integrated mental health interventions. The review concludes with a resounding call to action for policymakers, healthcare professionals, and communities. It advocates for culturally sensitive mental health policies, targeted healthcare training, and community-driven initiatives to foster environments conducive to positive body image and mental well-being. By acknowledging these challenges and committing to collaborative solutions, this review aims to contribute to developing comprehensive strategies that address BID in rural India and pave the way for healthier and more resilient communities.
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A rare case of Guillain barre syndrome with overlapping cerebral sinus venous thrombosis masquerading as acute psychosis following COVID-19 vaccination. MEDICAL SCIENCE 2023. [DOI: 10.54905/disssi/v27i133/e168ms2806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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8
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Acute onset psychosis in a patient of tuberous sclerosis: A rare entity. MEDICAL SCIENCE 2023. [DOI: 10.54905/disssi/v27i133/e167ms2748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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A Rare Presentation of Quadrigeminal Cistern (Tectal Plate) Lipoma With Visual Hallucinations in a Patient of Schizophrenia: A Case Report. Cureus 2022; 14:e31132. [DOI: 10.7759/cureus.31132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 11/05/2022] [Indexed: 11/07/2022] Open
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Suicidal Behaviours in First Episode Psychoses. JOURNAL OF PHARMACEUTICAL RESEARCH INTERNATIONAL 2021. [DOI: 10.9734/jpri/2021/v33i61b35133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Background: Psychotic disorders severely affect the quality of life of many patients. Mortality is very high in such patients. Suicide risk is 12 times more in patients with psychoses than in the general population. First episode psychosis has no agreed-upon definition, but the initial years are crucial for a better prognosis of the illness. Early intervention and timely management prove beneficial in improving quality of life and reducing mortality, mainly due to suicide. Suicide risk is about 1.5 times higher in the first year of treatment.
Aims and Objectives: We aim to find out the presence of suicidal ideas and attempts in FEP and find out risk factors for suicidal ideas and attempts in FEP. The study also assesses the nature of clinical manifestations, depression, and insight with suicidal ideas, suicidal attempts, and non-suicidal self-harm in FEP.
Methods: It is a cross-sectional observational study. Seventy-five indoor or outdoor patients aged 18 to 50yrs will be assessed. Tools used are sociodemographic proforma, PANSS, Addington Depression scale, Suicidality Module of MINI, and Birchwood Insight Scale.
Results and Discussion: This study’s result will help ascertain suicidal behaviors in first-episode psychosis. The study will also help identify risk factors and their role in suicide in these patients.
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APTES monolayer coverage on self-assembled magnetic nanospheres for controlled release of anticancer drug Nintedanib. Sci Rep 2021; 11:5674. [PMID: 33707549 PMCID: PMC7952395 DOI: 10.1038/s41598-021-84770-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 02/16/2021] [Indexed: 01/31/2023] Open
Abstract
The use of an appropriate delivery system capable of protecting, translocating, and selectively releasing therapeutic moieties to desired sites can promote the efficacy of an active compound. In this work, we have developed a nanoformulation which preserves its magnetization to load a model anticancerous drug and to explore the controlled release of the drug in a cancerous environment. For the preparation of the nanoformulation, self-assembled magnetic nanospheres (MNS) made of superparamagnetic iron oxide nanoparticles were grafted with a monolayer of (3-aminopropyl)triethoxysilane (APTES). A direct functionalization strategy was used to avoid the loss of the MNS magnetization. The successful preparation of the nanoformulation was validated by structural, microstructural, and magnetic investigations. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) were used to establish the presence of APTES on the MNS surface. The amine content quantified by a ninhydrin assay revealed the monolayer coverage of APTES over MNS. The monolayer coverage of APTES reduced only negligibly the saturation magnetization from 77 emu/g (for MNS) to 74 emu/g (for MNS-APTES). Detailed investigations of the thermoremanent magnetization were carried out to assess the superparamagnetism in the MNS. To make the nanoformulation pH-responsive, the anticancerous drug Nintedanib (NTD) was conjugated with MNS-APTES through the acid liable imine bond. At pH 5.5, which mimics a cancerous environment, a controlled release of 85% in 48 h was observed. On the other hand, prolonged release of NTD was found at physiological conditions (i.e., pH 7.4). In vitro cytotoxicity study showed dose-dependent activity of MNS-APTES-NTD for human lung cancer cells L-132. About 75% reduction in cellular viability for a 100 μg/mL concentration of nanoformulation was observed. The nanoformulation designed using MNS and monolayer coverage of APTES has potential in cancer therapy as well as in other nanobiological applications.
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Studies on interstitial carbon doping from a Ti precursor in a hierarchical TiO 2 nanostructured photoanode by a single step hydrothermal route. RSC Adv 2020; 10:28492-28500. [PMID: 35520089 PMCID: PMC9055801 DOI: 10.1039/d0ra04744a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 07/20/2020] [Indexed: 01/01/2023] Open
Abstract
Carbon doping from a Ti precursor in TiO2 synthesized by a hydrothermal method was studied. The structural, optical and morphological study of the deposited material was carried out using X-ray diffraction, UV-vis spectroscopy and scanning electron microscopy characterization techniques. The elemental composition of the TiO2 deposited with different precursor concentrations was studied using X-ray photoelectron spectroscopy and electron dispersive X-ray spectroscopy. The amount of elemental carbon in the TiO2 matrix is found to be increased as the Ti precursor concentration is increased, which strengthens the proposed idea of carbon doping via a Ti precursor. Interstitial carbon doping is possible directly from a Ti precursor (titanium(iv) isopropoxide) without using any other carbon source.![]()
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Evolution of structural and magnetic properties in iron oxide nanoparticles synthesized using Azadirachta indica leaf extract. NANO EXPRESS 2020. [DOI: 10.1088/2632-959x/aba682] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
The novel superparamagnetic nature of magnetic nanoparticles (MNPs) has received significant attention in the wide variety of fields. However, the prerequisites to use these MNPs, particularly in biomedical applications are biocompatibility and high saturation magnetization (Ms). Thus, the development of a sustainable approach for the synthesis of biocompatible MNPs, which utilizes the redox properties of natural compounds from plant extracts, is highly desired. Herein, we have examined the growth of phase selective MNPs synthesized using Azadirachta indica (Neem) extract as a reducing and capping agent. The physical and biological properties of MNPs synthesized with the modified green hydrothermal method at different reaction times and temperatures were investigated. It was observed that the reaction time and temperature strongly modulated the magnetic and structural characteristics of MNPs. At lower reaction time and temperature of 200 °C for 2 h, primarily iron oxalate hydrate (Fe(C2O4).2(H2O)) was formed. Further, with increasing reaction temperature, the phase transformation from iron oxalate hydrate to pure magnetite (Fe3O4) phase was observed. The MNPs prepared with optimum conditions of 220 °C for 4 h show superparamagnetic nature with improved Ms value of 58 emu g−1. The antibacterial study of MNPs against gram-positive bacteria Staphylococcus aureus showed that the MNPs inhibits the growth of bacteria with the least inhibitory MNPs concentration of 6 μl. Thus, the MNPs obtained by this modified biogenic approach will widen the scope and their applicability in future biomedical applications.
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Influenza Vaccine Paradox. Indian Pediatr 2019; 56:80. [PMID: 30806377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
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Study of smartphone addiction: prevalence, pattern of use, and personality dimensions among medical students from rural region of central India. OPEN JOURNAL OF PSYCHIATRY & ALLIED SCIENCES 2019. [DOI: 10.5958/2394-2061.2019.00029.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Psychiatric Comorbidity, Severity of Dependence and Liver Enzymes Dysfunction among Alcohol Dependent Individuals: A Cross-sectional Study from Central Rural India. J Clin Diagn Res 2019. [DOI: 10.7860/jcdr/2019/40368.12759] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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To Ride or Not to Ride? Indian Pediatr 2018; 55:919. [PMID: 30426964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
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Impact of collected sunlight on ZnFe2O4 nanoparticles for photocatalytic application. J Colloid Interface Sci 2018; 527:289-297. [PMID: 29800878 DOI: 10.1016/j.jcis.2018.05.051] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 05/09/2018] [Accepted: 05/18/2018] [Indexed: 11/30/2022]
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Drug 'Control' or Drug 'Fixing'. Indian Pediatr 2018; 55:619. [PMID: 30129559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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Abstract
CONTEXT Children of alcoholics (COAs) are children who have grown up in families in which either one or both parents are alcoholic. The interplay of several factors such as environmental, cognitive, and genetic vulnerability has been linked to the psychopathology among COAs. AIMS To assess psychiatric morbidity in COAs and to compare these children with the children of nonalcoholic parents. SETTING AND DESIGN This cross-sectional study was conducted on children of outpatients and inpatients of a tertiary health-care center in Central India, for 18 months. SUBJECTS AND METHODS A total of 100 children, fifty children of alcoholic parents and fifty children of nonalcoholic parents between the age groups of 4 and 14 years, were assessed using childhood psychopathology measurement schedule. STATISTICAL ANALYSIS USED Statistical analysis was done by using descriptive and inferential statistics using Chi-square test and Student's unpaired t-test. SPSS version 22.0, were used for statistical analysis, and P < 0.05 was considered as level of significance. RESULTS Most of the children were in the age group of 8-11 years. Depression and anxiety were found to be statistically significant (P < 0.05) in COAs than in children of nonalcoholics. Whereas, there was no difference (P > 0.05) for low intelligence and behavioral problems, conduct disorder, psychotic symptoms, special symptoms, physical illness, emotional problems, and somatization. CONCLUSIONS Thus, there is a high need to address the stress to children of persons with substance abuse. Early detection of psychiatric morbidities in such children and appropriate intervention can produce beneficial changes in such children.
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Monolayer grafting of aminosilane on magnetic nanoparticles: An efficient approach for targeted drug delivery system. J Colloid Interface Sci 2018; 529:415-425. [PMID: 29940324 DOI: 10.1016/j.jcis.2018.06.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 06/03/2018] [Accepted: 06/04/2018] [Indexed: 12/12/2022]
Abstract
Magnetic nanoparticles (MNPs) with higher magnetization are highly desirable for targeted drug delivery (TDD) systems, as it helps accumulation of drug at the target site. However, functionalization of MNPs for drug binding reduces the magnetization which affects the efficacy of TDD. Herein we report direct functionalization of MNPs with (3-Aminopropyl)triethoxysilane (APTES) which preserves the magnetization. Grafting density estimated by TGA and BET analysis showed monolayer grafting of APTES on MNP surface. MNPs were comprehensively characterized by XRD, HR-TEM, SQUID-VSM and FTIR. Anti-cancerous drug telmisartan (TEL) was loaded on monolayer APTES grafted MNPs. In-vitro controlled drug release and cytotoxicity study on PC-3 human prostate cancer cell line of TEL conjugated MNPs are also discussed. This functionalization strategy can be extended to other biomedical applications where higher magnetization is desired.
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Mimicking the Synaptic Weights and Human Forgetting Curve Using Hydrothermally Grown Nanostructured CuO Memristor Device. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2018; 18:984-991. [PMID: 29448523 DOI: 10.1166/jnn.2018.14264] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the present investigation, we have fabricated copper oxide (CuO) thin film memristor by employing a hydrothermal method for neuromorphic application. The X-ray diffraction pattern confirms the films are polycrystalline in nature with the monoclinic crystal structure. The developed devices show analog memory and synaptic property similar to biological neuron. The size dependent synaptic behavior is investigated for as-prepared and annealed CuO memristor. The results suggested that the magnitude of synaptic weights and resistive switching voltages are dependent on the thickness of the active layer. Synaptic weights are improved in the case of the as-prepared device whereas they are inferior for annealed CuO memristor. The rectifying property similar to a biological neuron is observed only for the as-prepared device, which suggested that as-prepared devices have better computational and learning capabilities than annealed CuO memristor. Moreover, the retention loss of the CuO memristor is in good agreement with the forgetting curve of human memory. The results suggested that hydrothermally grown CuO thin film memristor is a potential candidate for the neuromorphic device development.
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In-vitro effect of human cathelicidin antimicrobial peptide LL-37 on dengue virus type 2. Peptides 2017; 92:23-30. [PMID: 28400226 DOI: 10.1016/j.peptides.2017.04.002] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 03/30/2017] [Accepted: 04/07/2017] [Indexed: 12/17/2022]
Abstract
Human Cathelicidin antimicrobial peptide LL-37 is known to have antiviral activity against many viruses. In the present study, we investigated the in-vitro effect of LL-37 on dengue virus type 2 (DENV-2) infection and replication in Vero E6 cells. To study the effect of pretreatment of virus or cells with LL-37, the virus was pretreated with different concentrations of LL-37 (2.5μM-15μM) or scrambled (Scr) LL-37(5μM-15μM) and used for infection or the cells were first treated with LL-37 and infected. To study the effect of LL-37 post infection (PI), the cells were infected first followed by addition of LL-37 to the culture medium 24h after infection. In all conditions, after the incubation, the culture supernatant was assessed for viral RNA copy number by real time RT-PCR, infectious virus particles by focus forming unit assay (FFU) and non structural protein 1 (NS1) antigen levels by ELISA. Percentage of infection was assessed using immunoflourescence assay (IFA). The results revealed that pretreatment of virus with 10-15μM LL-37 significantly reduced its infectivity as compared to virus control (P<0.0001). Moreover, pretreatment of virus with 10-15μM LL-37 significantly reduced the levels of viral genomic RNA and NS1 antigen (P<0.0001). Treatment of virus with 10-15μM LL-37 resulted in two to three log reduction of mean log10 FFU/ml as compared to virus control (P<0.0001). Treatment of the virus with scrambled LL-37 had no effect on percentage of infection and viral load as compared to virus control cultures (P>0.05). Pretreatment of cells before infection or addition of LL-37 to the culture 24h PI had no effect on viral load. Molecular docking studies revealed possible binding of LL-37 to both the units of DENV envelope (E) protein dimer. Together, the in-vitro experiments and in-silico analyses suggest that LL-37 inhibits DENV-2 at the stage of entry into the cells by binding to the E protein. The results might have implications for prophylaxis against DENV infections and need further in-vivo studies.
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An experimental and theoretical study on a novel donor-π-acceptor bridge type 2, 4, 5-trimethoxy-4'-chlorochalcone for optoelectronic applications: A dual approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 173:445-456. [PMID: 27710809 DOI: 10.1016/j.saa.2016.09.022] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 09/01/2016] [Accepted: 09/17/2016] [Indexed: 06/06/2023]
Abstract
In this article the authors aim is to investigate and analyze the various key parameters of an organic D-π-A type novel nonlinear optical material 2, 4, 5-trimethoxy-4'-chlorochalcone (2,4,5TMCC) through experimental and quantum chemical studies. The Claisen-Schmidt condensation reaction mechanism was applied to synthesize the 2,4,5TMCC compound and its single crystal was grown by a slow evaporation solution growth (low cost) technique. The crystal structure was confirmed by powder X-ray diffraction analysis. The robust vibrational study has been done using FT-IR and FT-Raman spectra and its NLO activity was discussed. The factor group analysis was also performed. The optical absorption spectrum was recorded and the band gap was calculated to be 2.8eV. In photoluminescence spectrum, an intense emission band at ~540nm has been observed which shows that the grown crystals can be used in green organic light emitting diodes and laser applications. To achieve the stable ground state molecular geometry of 2,4,5TMCC, the computational techniques were applied at different levels of theory using 6-31G* basis set. The calculated geometrical parameters and vibrational spectra are found to be in good agreement with the experimental results. To probe the optical properties of the title compound the time dependent density functional theory was applied. The excitation wavelength was observed at ~398.63nm calculated at B3LYP/6-31G* level of theory and found close to experimental value (i.e. 396nm). The static first hyperpolarizability value is found to be 136 times higher than prototype urea molecule. Additionally, the molecular level approach was attained as HOMO-LUMO gap and electrostatic potential maps. The DSC study reveals that the titled material is stable up to 149°C. The photophysical and nonlinear optical properties suggest that the titled material could be a better choice for the fabrication of optoelectronic devices.
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Abstract
A variety of stimuli can cause reflex seizures, Some triggers include light, music and cognitive phenomenon. There are case reports however where the phenomenon of sexual activity has been a trigger for epileptic seizures. Most of these cases reported are in women so far, and were found to be localized to right cerebral hemisphere. We report a case of a 36-year-old male with orgasm-induced seizures, with other atypical features compared to majority of previous reports.
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Role of NF-κB as a Prognostic Marker in Breast Cancer : A Pilot Study in Indian Patients. Indian J Surg Oncol 2013; 4:242-7. [PMID: 24426730 DOI: 10.1007/s13193-013-0234-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Accepted: 03/19/2013] [Indexed: 11/28/2022] Open
Abstract
The nuclear factor κB (NF-κB) is a superfamily of transcription factors. It plays an important role in development & progression of cancer. This study was conducted in a tertiary care centre to investigate the significance of NF-κB as a prognostic marker in breast cancer and study its relation with established prognostic markers such as tumor grade, lymph node status, hormone receptor & HER-2/neu expression. We measured NF-κB expression of breast cancer tissue as a test sample & from fibroadenoma as a control. Measurement was done by Western Blot Technique using p65 protein of NF-κB super family of transcription factors. ER,PR and HER-2/neu were measured by immunohistochemistry methods. NF-κB/p65 is significantly associated with large tumor size (≥5 cm), high grade tumors, negative ER, negative PR, positive HER-2/neu and high NPI (≥5.4) scores. NF-κB/p65 expression implies aggressive biological behaviour of breast cancer & this study validates significant association of NF-κB /p65 overexpression with large tumor size, negative estrogen & progesterone receptor status and overexpression of c-erbB2 oncoprotein.
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Association of impaired cognitive functions with cardiovascular risk factors in elderly Indian population. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 2011; 59:91-94. [PMID: 21751643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND The prevalence of dementia is projected to rise dramatically in future with increasing life expectancy. Though dementia itself is not treatable in majority of cases, modification of co-morbid medical conditions may influence onset and rate of decline of cognitive functions. OBJECTIVE To determine the prevalence of dementia in elderly by assessing cognitive function and to assess the association of cardiovascular risk factors with cognitive functions. STUDY DESIGN Cross sectional analytical study. PARTICIPANTS 400 consecutive elderly subjects > 65 years attending Geriatric OPD, Dept. of Medicine, Indira Gandhi Government Medical College, Nagpur, were recruited and assessed for cognitive functions by applying Mini Mental Status examination Score (MMSE). Relationships between cardiovascular risk factors and impaired cognitive score were determined. RESULTS Prevalence of impaired cognitive function (MMSE Score < 25) was 33.25% (133 cases), while that of dementia (MMSE < 23) was 3.25 % (13 cases) in this elderly population. Impaired cognitive function was higher in those with low education and low socioeconomic status, (p = < 0.001). Increasing age, Female gender, alcohol intake and high cholesterol were found to be independently associated with impaired cognitive score in multiple logistic regression (p = < 0.001). Hypertension, diabetes mellitus, smoking and obesity were not associated with impaired cognitive score. CONCLUSION Prevalence of cognitive impairment rises significantly as the age advances and is associated with alcohol intake and high cholesterol.
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Communal action of microbial cultures for Red HE3B degradation. JOURNAL OF HAZARDOUS MATERIALS 2010; 181:263-270. [PMID: 20510505 DOI: 10.1016/j.jhazmat.2010.05.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Revised: 04/14/2010] [Accepted: 05/02/2010] [Indexed: 05/29/2023]
Abstract
The consortium PMB11 consisting of three bacterial species, originally isolated from dye contaminated soil was identified as Bacillus odysseyi SUK3, Morganella morganii SUK5 and Proteus sp. SUK7. The consortium possessed the ability to decolorize various textile dyes as well as mixtures of dyes. PMB11 could decolorize Red HE3B (50 mg l(-1)) with 99% of decolorization within 12 h in nutrient broth, while in mineral medium it could decolorize up to 97% within 24h. Induction in the activities of various oxidative and reductive enzymes indicates the involvement of these enzymes in decolorization. Biodegradation of the dye was monitored using UV-vis spectroscopy, HPLC and FTIR analysis. The Red HE3B degradation pathway was proposed by GC-MS analysis. Various metabolites formed after the degradation were identified as 2,5-diaminobenzene 6-aminotriazine, aniline 2-sulfate, aniline 3-sulfate, 2-amino 5-chlorotriazine and naphthalene. Phytotoxicity studies revealed that metabolites formed after degradation were significantly less toxic in nature.
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1,4-Bis(fluoro-meth-yl)benzene. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o459. [PMID: 21582131 PMCID: PMC2968459 DOI: 10.1107/s1600536809003730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2009] [Accepted: 01/30/2009] [Indexed: 11/20/2022]
Abstract
The title compound, C8H8F2, lies across a crystallographic inversion centre. The structure features short C⋯F [2.8515 (18) Å] and F⋯F [2.490 (4) Å] contacts, which are significantly shorter than the sum of the van der Waals radii of these atoms. The F atom and methylene H atoms are disordered over two positions with a site-occupancy ratio of 0.633 (3):0.367 (3). In the crystal structure, intermolecular C—H⋯F interactions link neighboring molecules into infinite chains along the b axis. In addition, C—H⋯π interactions link these molecules along [10], forming a two-dimensional network parallel to (101).
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Nonlinear optical properties of 2,4,5-Trimethoxy-4-nitrochalcone: observation of two-photon-induced excited-state nonlinearities. OPTICS EXPRESS 2009; 17:1126-1135. [PMID: 19158930 DOI: 10.1364/oe.17.001126] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report experimental investigations of optical nonlinearities and nonlinear dynamics in acetone solution of 2,4,5-Trimethoxy-4- nitrochalcone. By performing Z-scans with femtosecond laser pulses at low excitation intensity, two-photon absorption (2PA) and third-order nonlinear refraction are measured. As laser excitation intensity exceeds a critical value, however, the interplay between third- and fifth-order nonlinearities is observed. It is also confirmed that fifth-order processes mainly originate from 2PA-induced excited-state nonlinearities by conducting femtosecond time-resolved degenerate pump-probe measurements. All the nonlinear parameters are determined unambiguously in the near infrared region of the 2PA cross-section, second-order hyperpolarizability, excited-state absorption cross-section, excited-state refraction cross-section, lifetime of excited states induced by 2PA, and critical population of the excited states in 2,4,5-Trimethoxy-4-nitrochalcone molecule.
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3-(2,4-Dichloro-phen-yl)-1,5-di-2-furylpentane-1,5-dione. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o336-7. [PMID: 21581939 PMCID: PMC2968225 DOI: 10.1107/s1600536809001548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Accepted: 01/13/2009] [Indexed: 11/10/2022]
Abstract
In the title compound, C(19)H(14)Cl(2)O(4), intra-molecular C-H⋯O and C-H⋯Cl hydrogen bonds generate S(6) and S(5) ring motifs, respectively. In the crystal structure, inter-molecular C-H⋯O inter-actions between symmetry-related mol-ecules involving two methyl-ene groups and an O atom as a bifurcated acceptor generate an R(2) (1)(6) ring motif. In the mol-ecule, one of the furan rings is rotationally disordered by approximately 180° about the single C-C bond to which it is attached; the refined site-occupancy factors are 0.505 (7) and 0.495 (7). The major component of the disordered furan ring and the benzene ring form a dihedral angle of 88.8 (4)°. The dihedral angle between the major disorder component and the other furan ring is 81.9 (4)°. In addition, the crystal structure is stabilized by further inter-molecular C-H⋯O (×2) hydrogen bonds and C-H⋯π inter-actions.
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Media optimization studies for Serratiopeptidase production from Serratia marcescens ATCC 13880. HINDUSTAN ANTIBIOTICS BULLETIN 2009; 51:17-23. [PMID: 21268555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Production of an anti-inflammatory enzyme serratiopeptidase by fermentation with Serratia marcescens ATCC 13880 was studied to ascertain optimal nutritional conditions for large scale production. To study biosynthesis and production of serratiopeptidase by Serratia marcescens ATCC 13880, different physicochemical parameters were studied and optimized. The optimized medium contain, (g/l) glycerine 10.0, maltose 10.0 as carbon source, peptone 10.0 as organic nitrogen source, ammonium sulphate 10.0 as inorganic nitrogen source, dihydrogen phosphate 10.0, sodium bicarbonate 10.0, sodium acetate 10.0 as inorganic salt source, ascorbic acid 10.0 as stabilizer, distilled water 1000 ml and the optimized fermentation conditions were pH 7.0, temperature 37 degrees C and duration 24 hr. The modified fermentation medium produced 27.36 IU/ml of serratiopeptidase compared to 17.97 IU/ml in basal medium and the molecular weight of the purified serratiopeptidase was found to be 52 kD.
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Traditional herbal remedies in Buldhana District (Maharashtra, India). Anc Sci Life 2009; 28:38-41. [PMID: 22557332 PMCID: PMC3336328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
The paper documents traditional herbal remedies from buldhana district of Maharashtra (India). The plant parts most commonly used are bark, leaves, flowers, fruits and seeds, apart from plant products like latex and gum. The medicaments include recipes like decoction, infusion, paste, ash, extract juice, besides gum and latex. There are mainly used afresh. Occasionally, these are supplemented by domestic edible substances of plant-origin. The reliance on herbal medicines for healthcare is associated with traditional belief of effectiveness as well as poor economic status. Role of homestead gardens in native phytotherapy is being focused for the first time from this region. The first-hand information adduced is desired to divulge new lead molecules or will add new sources of herbal medicine.
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Erratum: 2-Bromo-1-(4-methyl-phen-yl)-3-phenyl-prop-2-en-1-one. Corrigendum. Acta Crystallogr Sect E Struct Rep Online 2008; 64:e32. [PMID: 21581102 PMCID: PMC2960065 DOI: 10.1107/s1600536808035356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2008] [Accepted: 10/29/2008] [Indexed: 11/10/2022]
Abstract
Corrigendum to Acta Cryst. (2008), E64, o1559. The chemical name in the title and the scheme of the paper by Fun, Jebas, Patil, Karthikeyan & Dharmaprakash [Acta Cryst. (2008), E64, o1559] are corrected.
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2,5-Dimethoxy-benzaldehyde thio-semicarbazone. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o2276. [PMID: 21581256 PMCID: PMC2959953 DOI: 10.1107/s1600536808035198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2008] [Accepted: 10/28/2008] [Indexed: 11/11/2022]
Abstract
In the title molecule, C10H13N3O2S, the dihedral angle between benzene and –N—C(=S)—N—N=C– planes is 9.20 (6)°. The two methoxy groups are coplanar with the benzene ring [C—O—C—C torsion angles of −2.31 (18) and −6.45 (17)°]. In the crystal structure, molecules are linked by intermolecular N—H⋯S, N—H⋯O and C—H⋯O hydrogen bonds, forming a three-dimensional network.
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3-Hydr-oxy-4-methoxy-benzaldehyde thio-semicarbazone hemihydrate. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o2274-5. [PMID: 21581255 PMCID: PMC2959916 DOI: 10.1107/s1600536808035617] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2008] [Accepted: 10/30/2008] [Indexed: 05/26/2023]
Abstract
The asymmetric unit of the title compound, C9H11N3O2S·0.5H2O, comprises two crystallograpically independent thiosemicarbazone molecules (A and B) and a water molecule of crystallization. In each of the thiosemicarbazone molecules, intramolecular O—H⋯O and N—H⋯N hydrogen bonds form five-membered rings, producing S(5) ring motifs. Intermolecular O—H⋯S and N—H⋯O interactions between molecule B and the water molecule form a six-membered ring, producing an R22(6) ring motif. Intermolecular N—H⋯S hydrogen bonds form dimers involving pairs of both A and B molecules, which form R22(8) ring motifs. The angles between the aromatic ring and thiourea unit in the two molecules are 0.80 (6) and 3.28 (5)°, which proves that each molecule is fairly planar. The crystal structure is stabilized by intermolecular O—H⋯S (×2), O—H⋯O, N—H⋯S (×2) and N—H⋯O (×2) hydrogen bonds and C—H⋯O (×2) contacts to form a three-dimensional network.
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Ethyl 2-[(E)-4-(dimethyl-amino)benzyl-idenehydrazino]-5-nitro-benzoate. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o2286-7. [PMID: 21581265 PMCID: PMC2959927 DOI: 10.1107/s1600536808035939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2008] [Accepted: 11/01/2008] [Indexed: 11/19/2022]
Abstract
The title compound, C18H20N4O4, exists in the E configuration with respect to the C=N bond of the methylidine unit. The dihedral angle between the two benzene rings is 9.01 (6)°. An intramolecular N—H⋯O hydrogen bond involving the benzoate unit generates an S(6) ring motif. In the crystal, the molecules are linked by weak C—H⋯O interactions into infinite chains along the b axis. These chains are further connected into sheets parallel to the ab plane which are stacked approximately along the c axis. A C—H⋯π interaction is also observed.
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(E)-1-(4-Amino-phen-yl)-3-(2-chloro-phen-yl)prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o2014-5. [PMID: 21201210 PMCID: PMC2959457 DOI: 10.1107/s1600536808030456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2008] [Accepted: 09/22/2008] [Indexed: 11/10/2022]
Abstract
The title compound, C(15)H(12)ClNO, a substituted chalcone, adopts an E configuration with respect to the C=C bond of the enone unit. The mol-ecule is not planar, as can be seen from the dihedral angle of 28.9 (2)° between the two rings which are twisted from each other. The enone segment of the mol-ecule is not coplanar with the chloro-phenyl ring, making a dihedral angle of 23.4 (3)° with it. The amino group is also not coplanar with the ring to which it is bound, making a dihedral angle of 35 (4)°. In the crystal structure, adjacent mol-ecules are linked by N-H⋯O inter-actions into one-dimensional infinite chains along the c axis, and are further stacked as one-dimensional zigzag chains down the b axis, forming two-dimensional extended networks parallel to the bc plane.
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N'-[(E)-1-Phenyl-ethyl-idene]benzo-hydrazide. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1961-2. [PMID: 21201163 PMCID: PMC2959329 DOI: 10.1107/s1600536808029218] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2008] [Accepted: 09/11/2008] [Indexed: 11/11/2022]
Abstract
The title compound, C15H14N2O, crystallized with two independent molecules in the asymmetric unit. Both molecules are non-planar and have an E configuration with respect to the C=N bond. The dihedral angles between the two benzene rings are 11.1 (2)° in one molecule and 12.40 (19)° in the other. In the crystal structure, the molecules are linked by N—H⋯O hydrogen bonds and weak C—H⋯O interactions into infinite one-dimensional chains along [1 0 0]. The crystal structure is further stabilized by N—H⋯O hydrogen bonds, weak C—H⋯O and very weak C—H⋯π interactions.
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N'-[(Z)-4-(Dimethyl-amino)benzyl-idene]-4-nitro-benzohydrazide mono-hydrate. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1907-8. [PMID: 21201117 PMCID: PMC2959418 DOI: 10.1107/s1600536808028328] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Accepted: 09/04/2008] [Indexed: 11/21/2022]
Abstract
In the asymmetric unit of the title compound, C16H16N4O3·H2O, there are two symmetry-independent hydrazide molecules with almost identical geometries, and two independent water molecules. The dihedral angles between the two benzene rings in the two hydrazide molecules are 0.11 (5) and 0.77 (5)°. In one molecule, an intramolecular C—H⋯O hydrogen bond generates a ring of graph-set motif S(5). Intermolecular N—H⋯O, O—H⋯O, O—H⋯N and C—H⋯O hydrogen bonds and π–π stacking interactions between the benzene rings [centroid–centroid distances in the range 3.5021 (6)–3.6403 (6) Å] are observed, together with O⋯O [2.7226 (11) Å], O⋯N [2.7072 (10) Å] and N⋯O [2.7072 (10)–2.8582 (12) Å] short contacts. The hydrazine molecules are stacked along the b axis and adjacent molecules are linked by water molecules.
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(E)-3-(2,4-Dichloro-phen-yl)-1-(2-thien-yl)prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1814-5. [PMID: 21201791 PMCID: PMC2960483 DOI: 10.1107/s1600536808026524] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2008] [Accepted: 08/18/2008] [Indexed: 11/19/2022]
Abstract
In the title chalcone derivative, C13H8Cl2OS, the prop-2-en-1-one unit and the thiophene and 2,4-dichlorophenyl rings are each essentially planar. The interplanar angle between the thiophene and 2,4-dichlorophenyl rings is 19.87 (6)°. Weak intramolecular C—H⋯O and C—H⋯Cl interactions involving the prop-2-en-1-one unit generate an S(5)S(5) ring motif. In the crystal structure, molecules are linked into head-to-tail zigzag chains along the a axis and adjacent chains are cross-linked. These cross-linked chains are arranged into sheets parallel to the ab plane. The crystal structure is stabilized by weak C—H⋯O, C—H⋯Cl and C—H⋯π interactions. A π–π interaction was also observed with a centroid–centroid distance of 3.6845 (6) Å.
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Surfactant-mediated growth of nanostructured zinc oxide thin films via electrodeposition and their photoelectrochemical performance. NANOTECHNOLOGY 2008; 19:325706. [PMID: 21828828 DOI: 10.1088/0957-4484/19/32/325706] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Zinc oxide (ZnO) thin films were electrodeposited from an aqueous zinc acetate solution onto fluorine-doped thin oxide (FTO) coated conducting glass substrates. The effect of organic surfactants like polyvinyl pyrrolidone (PVP), sodium dodecyl sulfate (SDS), polyethylene glycol (PEG), ethylene glycol (EG) and polyvinyl alcohol (PVA) on their structural, morphological, optical and photoelectrochemical properties was studied. The x-ray diffraction patterns revealed the formation of phase-pure ZnO thin films. The films deposited using organic surfactants exhibit different surface morphologies. It was observed that the organic surfactants play important roles in modifying the surface morphology and size of the crystallites. A compact granular morphology was observed for the ZnO samples grown without organic surfactants. The films exhibit nanoparticles of size 100-150 nm for PVP, EG and PVA mediated growth. The vertically aligned thin and compact hexagonal crystallites stem from the SDS, whereas microporous corrugated morphology is observed for PEG-mediated growth. All the samples exhibit room temperature photoluminescence (PL). Oxygen vacancies contribute to the active luminescent centers for the emission of green light in ZnO thin films. PL gets quenched for the SDS surfactant. All the samples were post-treated with ethanol to remove stray surfactant molecules. FTIR study was used to confirm the removal of adsorbed surfactant molecules from the samples. Moreover the samples are photoelectrochemically (PEC) active and exhibit the highest photocurrent of 231 µA, a photovoltage of 492 mV and 0.42 fill factor for the ZnO:SDS films.
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3-(2-Chloro-6-fluoro-phen-yl)-1-(2-thien-yl)prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1720-1. [PMID: 21201705 PMCID: PMC2960501 DOI: 10.1107/s1600536808024872] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2008] [Accepted: 08/02/2008] [Indexed: 11/23/2022]
Abstract
The title chalcone derivative, C13H8ClFOS, crystallized as an inversion twin with two independent molecules in the asymmetric unit. The thiophene rings in both molecules are disordered over two sites: the ratios of occupancies for the major and minor components in the two molecules are 0.820 (2):0.180 (2) and 0.853 (2):0.147 (2). The dihedral angles between the major and minor components of the thiophene and benzene rings are 1.13 (18) and 2.2 (6)°, respectively, in one molecule, with corresponding values 6.09 (17) and 1.3 (6)° in the other. Weak intramolecular C—H⋯O and C—H⋯F interactions involving the prop-2-en-1-one group generate an S(5)S(5) ring motif, whereas a weak intramolecular C—H⋯Cl contact generates an S(6) ring motif. In the crystal structure, molecules of both the major and minor components are linked into infinite one-dimensional chains along the b axis. The crystal structure is stabilized by weak C—H⋯O, C—H⋯F, C—H⋯Cl and C—H⋯π interactions.
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4-Chloro-N'-[(Z)-4-(dimethyl-amino)benzyl-idene]benzohydrazide mono-hydrate. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1594-5. [PMID: 21203289 PMCID: PMC2962208 DOI: 10.1107/s1600536808022861] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2008] [Accepted: 07/21/2008] [Indexed: 05/26/2023]
Abstract
In the title compound, C16H16ClN3O·H2O, the dihedral angle between the two aromatic rings is 44.58 (11)°. The N atom of the dimethylamino group adopts a pyramidal configuration. In the crystal structure, molecules are linked into a two-dimensional network parallel to the (001) plane by intermolecular N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds involving the water molecule and C—H⋯Cl hydrogen bonds. In addition, C—H⋯π interactions are observed.
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(E)-3-(4-Chloro-phen-yl)-1-(2-thien-yl)prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1592-3. [PMID: 21203288 PMCID: PMC2962207 DOI: 10.1107/s1600536808022782] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2008] [Accepted: 07/20/2008] [Indexed: 11/10/2022]
Abstract
The title compound, C(13)H(9)ClOS, adopts an E configuration with respect to the C=C double bond of the propenone unit. The thienyl and benzene rings are slightly twisted from each other, making a dihedral angle of 6.38 (3)°. An intra-molecular C-H⋯O hydrogen bond generates an S(5) ring motif. A weak inter-molecular C-H⋯O inter-action, a short intra-molecular S⋯O contact [2.932 (2) Å] and two π-π inter-actions between the thienyl and benzene rings are observed. The centroid-centroid distances of the π-π inter-actions are 3.7899 (16) and 3.7891 (16) Å.
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2-Bromo-1-(4-methyl-phen-yl)-3-phenyl-prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1559. [PMID: 21203262 PMCID: PMC2962181 DOI: 10.1107/s1600536808022289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Accepted: 07/16/2008] [Indexed: 11/30/2022]
Abstract
In the crystal structure of the title compound, C16H13BrO, the two benzene rings are twisted from each other with a dihedral angle of 52.55 (9)°. Both an intramolecular C—H⋯Br hydrogen bond, which generates an S(6) ring motif, and a short Br⋯O contact [2.9907 (19) Å] may influence the conformation of the molecule. The crystal packing is stabilized by weak intermolecular C—H⋯O interactions.
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1-(4-Bromo-phen-yl)-3-(4-ethoxy-phen-yl)-prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1540-1. [PMID: 21203245 PMCID: PMC2962165 DOI: 10.1107/s1600536808021776] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2008] [Accepted: 07/13/2008] [Indexed: 11/10/2022]
Abstract
The title compound, C(17)H(15)BrO(2), consists of two substituted benzene rings connected by a prop-2-en-1-one group. The mol-ecule is nearly planar and adopts an E configuration. The dihedral angle between the two benzene rings is 8.51 (19)°. The enone plane makes dihedral angles of 11.06 (19) and 7.69 (19)°, respectively, with the bromo-phenyl and ethoxy-phenyl rings. The mol-ecules are linked by C-H⋯O hydrogen bonds to form a zigzag ribbon-like structure along the b direction. The crystal structure is stabilized by weak intra- and inter-molecular C-H⋯O inter-actions.
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(E)-3-(2-Chloro-phen-yl)-1-(3-methoxy-phen-yl)prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1525. [PMID: 21203232 PMCID: PMC2962150 DOI: 10.1107/s1600536808021910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2008] [Accepted: 07/14/2008] [Indexed: 12/05/2022]
Abstract
The title compound, C16H13ClO2, adopts an E configuration with respect to the double bond of the propenone unit. The two benzene rings are twisted slightly from each other, making a dihedral angle of 7.14 (5)°. The molecules are arranged in stacks, in which adjacent molecules are related by inversion symmetry and form π–π interactions with a centroid–centroid distance of 3.7098 (6) Å. C—H⋯O and C—H⋯π interactions are formed between neighbouring molecules.
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(E)-3-(4-Chloro-phen-yl)-1-(2-fur-yl)prop-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1530. [PMID: 21203235 PMCID: PMC2962155 DOI: 10.1107/s1600536808021934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2008] [Accepted: 07/14/2008] [Indexed: 12/03/2022]
Abstract
In the title mol-ecule, C(13)H(9)ClO(2), the benzene and furyl rings are slightly twisted from each other with a dihedral angle of 5.1 (1)°. An intra-molecular C-H⋯O hydrogen-bond inter-action generates an S(5) ring motif. In the crystal structure, mol-ecules are stacked along the b axis and the crystal packing is stabilized by weak inter-molecular C-H⋯O hydrogen bonds.
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