Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 39
Filtrar
Más filtros

Banco de datos
País/Región como asunto
Tipo del documento
Intervalo de año de publicación
1.
PLoS Biol ; 22(8): e3002776, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39163475

RESUMEN

The ultraviolet (UV) radiation triggers a pigmentation response in human skin, wherein, melanocytes rapidly activate divergent maturation and proliferation programs. Using single-cell sequencing, we demonstrate that these 2 programs are segregated in distinct subpopulations in melanocytes of human and zebrafish skin. The coexistence of these 2 cell states in cultured melanocytes suggests possible cell autonomy. Luria-Delbrück fluctuation test reveals that the initial establishment of these states is stochastic. Tracking of pigmenting cells ascertains that the stochastically acquired state is faithfully propagated in the progeny. A systemic approach combining single-cell multi-omics (RNA+ATAC) coupled to enhancer mapping with H3K27 acetylation successfully identified state-specific transcriptional networks. This comprehensive analysis led to the construction of a gene regulatory network (GRN) that under the influence of noise, establishes a bistable system of pigmentation and proliferation at the population level. This GRN recapitulates melanocyte behaviour in response to external cues that reinforce either of the states. Our work highlights that inherent stochasticity within melanocytes establishes dedicated states, and the mature state is sustained by selective enhancers mark through histone acetylation. While the initial cue triggers a proliferation response, the continued signal activates and maintains the pigmenting subpopulation via epigenetic imprinting. Thereby our study provides the basis of coexistence of distinct populations which ensures effective pigmentation response while preserving the self-renewal capacity.


Asunto(s)
Proliferación Celular , Redes Reguladoras de Genes , Melanocitos , Pigmentación de la Piel , Pez Cebra , Melanocitos/metabolismo , Pez Cebra/genética , Animales , Humanos , Pigmentación de la Piel/genética , Pigmentación de la Piel/fisiología , Procesos Estocásticos , Diferenciación Celular/genética , Histonas/metabolismo , Acetilación , Rayos Ultravioleta , Análisis de la Célula Individual , Pigmentación/genética , Elementos de Facilitación Genéticos/genética , Epigénesis Genética , Piel/metabolismo , Piel/citología
2.
Curr Microbiol ; 81(8): 222, 2024 Jun 14.
Artículo en Inglés | MEDLINE | ID: mdl-38874817

RESUMEN

In the present scenario, growing population demands more food, resulting in the need for sustainable agriculture. Numerous approaches are explored in response to dangers and obstacles to sustainable agriculture. A viable approach is to be exploiting microbial consortium, which generate diverse biostimulants with growth-promoting characteristics for plants. These bioinoculants play an indispensable role in optimizing nutrient uptake efficiency mitigating environmental stress. Plant productivity is mostly determined by the microbial associations that exist at the rhizospheric region of plants. The engineered consortium with multifunctional attributes can be effectively employed to improve crop growth efficacy. A number of approaches have been employed to identify the efficient consortia for plant growth and enhanced crop productivity. Various plant growth-promoting (PGP) microbes with host growth-supporting characteristics were investigated to see if they might work cohesively and provide a cumulative effect for improved growth and crop yield. The effective microbial consortia should be assessed using compatibility tests, pot experimentation techniques, generation time, a novel and quick plant bioassay, and sensitivity to external stimuli (temperature, pH). The mixture of two or more microbial strains found in the root microbiome stimulates plant growth and development. The present review deals with mechanism, formulation, inoculation process, commercialization, and applications of microbial consortia as plant bioinoculants for agricultural sustainability.


Asunto(s)
Agricultura , Productos Agrícolas , Consorcios Microbianos , Desarrollo de la Planta , Agricultura/métodos , Productos Agrícolas/microbiología , Microbiología del Suelo , Raíces de Plantas/microbiología , Bacterias/metabolismo , Bacterias/clasificación , Bacterias/genética , Rizosfera , Plantas/microbiología , Microbiota
3.
Curr Microbiol ; 81(8): 251, 2024 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-38954017

RESUMEN

A new area of biotechnology is nanotechnology. Nanotechnology is an emerging field that aims to develope various substances with nano-dimensions that have utilization in the various sectors of pharmaceuticals, bio prospecting, human activities and biomedical applications. An essential stage in the development of nanotechnology is the creation of nanoparticles. To increase their biological uses, eco-friendly material synthesis processes are becoming increasingly important. Recent years have shown a lot of interest in nanostructured materials due to their beneficial and unique characteristics compared to their polycrystalline counterparts. The fascinating performance of nanomaterials in electronics, optics, and photonics has generated a lot of interest. An eco-friendly approach of creating nanoparticles has emerged in order to get around the drawbacks of conventional techniques. Today, a wide range of nanoparticles have been created by employing various microbes, and their potential in numerous cutting-edge technological fields have been investigated. These particles have well-defined chemical compositions, sizes, and morphologies. The green production of nanoparticles mostly uses plants and microbes. Hence, the use of microbial nanotechnology in agriculture and plant science is the main emphasis of this review. The present review highlights the methods of biological synthesis of nanoparticles available with a major focus on microbially synthesized nanoparticles, parameters and biochemistry involved. Further, it takes into account the genetic engineering and synthetic biology involved in microbial nanobiosynthesis to the construction of microbial nanofactories.


Asunto(s)
Nanopartículas , Nanotecnología , Nanotecnología/métodos , Nanopartículas/química , Bacterias/metabolismo , Bacterias/genética , Biotecnología/métodos , Biología Sintética/métodos , Nanoestructuras/química
4.
EMBO Rep ; 21(1): e48333, 2020 01 07.
Artículo en Inglés | MEDLINE | ID: mdl-31709752

RESUMEN

Tanning response and melanocyte differentiation are mediated by the central transcription factor MITF. This involves the rapid and selective induction of melanocyte maturation genes, while concomitantly the expression of other effector genes is maintained. In this study, using cell-based and zebrafish model systems, we report on a pH-mediated feed-forward mechanism of epigenetic regulation that enables selective amplification of the melanocyte maturation program. We demonstrate that MITF activation directly elevates the expression of the enzyme carbonic anhydrase 14 (CA14). Nuclear localization of CA14 leads to an increase of the intracellular pH, resulting in the activation of the histone acetyl transferase p300/CBP. In turn, enhanced H3K27 histone acetylation at selected differentiation genes facilitates their amplified expression via MITF. CRISPR-mediated targeted missense mutation of CA14 in zebrafish results in the formation of immature acidic melanocytes with decreased pigmentation, establishing a central role for this mechanism during melanocyte differentiation in vivo. Thus, we describe an epigenetic control system via pH modulation that reinforces cell fate determination by altering chromatin dynamics.


Asunto(s)
Factor de Transcripción Asociado a Microftalmía , Pez Cebra , Acetilación , Animales , Diferenciación Celular , Epigénesis Genética , Histonas/genética , Histonas/metabolismo , Concentración de Iones de Hidrógeno , Melanocitos/metabolismo , Factor de Transcripción Asociado a Microftalmía/genética , Factor de Transcripción Asociado a Microftalmía/metabolismo , Pigmentación , Pez Cebra/genética , Pez Cebra/metabolismo
5.
Biotechnol Appl Biochem ; 69(1): 51-60, 2022 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-33242354

RESUMEN

Bioremediation is a promising technology for the treatment of environmental contaminants and paving new avenues for the betterment of the environment. Over the last some years, several approaches have been employed to optimize the genetic machinery of microorganisms relevant to bioremediation. Metabolic engineering is one of them that provides a new insight for bioremediation. This review envisages the critical role of these techniques toward exploring the possibilities of the creation of a new pathway, leading to pathway expansion to new substrates by assembling of catabolic modules from different origins in the same microbial cell. The recombinant DNA technology and gene editing tools were also explored for the construction of metabolically engineered microbial strains for the degradation of complex pollutants. Moreover, the importance of CRISPR-Cas system for knock-in and knock-out of genes was described by using recent studies. Further, the idea of the cocultivation of more than one metabolic engineered microbial communities is also discussed, which can be crucial in the bioremediation of multiple and complex pollutants. Finally, this review also elucidates the effective application of metabolic engineering in bioremediation through these techniques and tools.


Asunto(s)
Contaminantes Ambientales , Ingeniería Metabólica , Biodegradación Ambiental , Sistemas CRISPR-Cas , Edición Génica
6.
Alcohol Alcohol ; 56(1): 42-46, 2021 Jan 04.
Artículo en Inglés | MEDLINE | ID: mdl-33150930

RESUMEN

AIMS: We conducted a cross-sectional survey to estimate the prevalence and clinical manifestation of disulfiram ethanol reaction (DER) and isopropanol toxicity (IT) in patients with alcohol use disorders, on disulfiram. Alcohol-based hand rub contains either ethanol or isopropanol or both. COVID-19 pandemic has led to wide scale usage of sanitizers. Patients with alcohol use disorders, on disulfiram, might experience disulfiram ethanol like reactions with alcohol-based sanitizers. METHODS: We telephonically contacted 339 patients, prescribed disulfiram between January 2014 and March 2020. The assessment pertained to the last 3 months (i.e. third week of March to third week of June 2020). RESULT: The sample consisted of middle-aged men with a mean 16 years of alcohol dependence. Among the 82 (24%) patients adherent to disulfiram, 42 (12.3%) were using alcohol-based hand rubs. Out of these, a total of eight patients (19%; 95% CI 9-33) had features suggestive of DER; four of whom also had features indicative of IT. Five patients (62.5%) had mild and self-limiting symptoms. Severe systemic reactions were experienced by three (37.5%). Severe reactions were observed with exposure to sanitizers in greater amounts, on moist skin or through inhalation. CONCLUSION: Patients on disulfiram should be advised to use alternate methods of hand hygiene.


Asunto(s)
Disuasivos de Alcohol/efectos adversos , Alcoholismo/diagnóstico , Disulfiram/efectos adversos , Efectos Colaterales y Reacciones Adversas Relacionados con Medicamentos/diagnóstico , Etanol/efectos adversos , Desinfectantes para las Manos/efectos adversos , 2-Propanol/administración & dosificación , 2-Propanol/efectos adversos , Adulto , Disuasivos de Alcohol/administración & dosificación , Alcoholismo/tratamiento farmacológico , COVID-19/prevención & control , Estudios Transversales , Disulfiram/administración & dosificación , Efectos Colaterales y Reacciones Adversas Relacionados con Medicamentos/etiología , Etanol/administración & dosificación , Desinfectantes para las Manos/administración & dosificación , Humanos , Masculino , Persona de Mediana Edad , Centros de Tratamiento de Abuso de Sustancias
7.
Crit Rev Biotechnol ; 39(1): 79-98, 2019 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-30198342

RESUMEN

Today, environmental pollution is a serious problem, and bioremediation can play an important role in cleaning contaminated sites. Remediation strategies, such as chemical and physical approaches, are not enough to mitigate pollution problems because of the continuous generation of novel recalcitrant pollutants due to anthropogenic activities. Bioremediation using microbes is an eco-friendly and socially acceptable alternative to conventional remediation approaches. Many microbes with a bioremediation potential have been isolated and characterized but, in many cases, cannot completely degrade the targeted pollutant or are ineffective in situations with mixed wastes. This review envisages advances in systems biology (SB), which enables the analysis of microbial behavior at a community level under different environmental stresses. By applying a SB approach, crucial preliminary information can be obtained for metabolic engineering (ME) of microbes for their enhanced bioremediation capabilities. This review also highlights the integrated SB and ME tools and techniques for bioremediation purposes.


Asunto(s)
Biodegradación Ambiental , Ingeniería Metabólica/métodos , Microbiota/fisiología , Biología de Sistemas , Biotecnología , Sistemas CRISPR-Cas , Biología Computacional , Contaminantes Ambientales , Contaminación Ambiental , Edición Génica/métodos , Regulación de la Expresión Génica , Genómica , Redes y Vías Metabólicas/genética , Redes y Vías Metabólicas/fisiología , Microbiota/genética , Familia de Multigenes , Transcriptoma
8.
BMC Public Health ; 19(1): 1545, 2019 Nov 21.
Artículo en Inglés | MEDLINE | ID: mdl-31752802

RESUMEN

BACKGROUND: WHO addresses the infectious disease like Tuberculosis, and non- communicable disease like Diabetes among the top 10 causes of death worldwide, which collectively leads to increasing mortality and premature death especially in developing countries. Hence, the present study aims to assess the prevalence of diabetes and its associated risk factors among the tuberculosis patient of Morang, Eastern Nepal. METHODS: A cross-sectional study was carried out among the 320 respondents undergoing tuberculosis treatment of Morang district. Respondents from eight randomly selected DOTS centers were selected purposively. The Fasting Blood Sugar and 2-h Post-Prandial Blood Sugar were assessed in the laboratory of respective DOTS center by the glucose oxidase method. An interview for socio-demographic and other variables was conducted using a pretested semi-structured questionnaire based on WHO-STEP Instrument for chronic disease and excerpt from DASS-21 was used for the variable stress. RESULTS: The prevalence of diabetes, pre-diabetic and glucose intolerance among tuberculosis patient was 11.9, 17.2, and 17.8% respectively. Additionally, the univariate analysis reported, user of tobacco products, current alcohol consumers, family history of diabetes and stress level, to have positive association with diabetes, while the multivariate analysis reported, the current alcohol consumer as the significant predictor of diabetes among the tuberculosis patient. CONCLUSION: A significant portion of the respondents were diabetic, impaired glucose tolerance and pre-diabetic, which supports the fact of diabetes being comorbid with tuberculosis. Hence, it shifts the focus on the bidirectional screening of tuberculosis and diabetes.


Asunto(s)
Diabetes Mellitus/epidemiología , Tuberculosis/terapia , Adulto , Comorbilidad , Estudios Transversales , Femenino , Intolerancia a la Glucosa/epidemiología , Humanos , Masculino , Nepal/epidemiología , Estado Prediabético/epidemiología , Prevalencia , Factores de Riesgo , Encuestas y Cuestionarios , Tuberculosis/epidemiología
9.
World J Microbiol Biotechnol ; 35(11): 166, 2019 Oct 22.
Artículo en Inglés | MEDLINE | ID: mdl-31641867

RESUMEN

Microbial secondary metabolites (SMs) have been identified as an important natural source of drugs for several metabolic and neurological diseases. Along with biomedical applications, SMs are also used in the food and biochemical industries. SMs include natural products such as pigments, alkaloids, toxins, antimicrobials obtained from cultured microorganisms, while other non-cultivable microorganisms have also acted as a rich source of SMs. But, the isolation of SMs from these sources is a very tedious task. Metabolomics provides complete identification and structural information about the entire cellular metabolome under specific conditions using highly sophisticated instrumentation. Further, gene editing techniques such as cloning and gene refactoring, including advanced CRISPR-Cas, can be used for engineering microbes that have the potential to produce natural SMs that were not produced in native microbial strain. The present review describes integrated metabolomics and gene editing approaches for the synthesis of novel microbial SMs and their potential application towards drug discovery and development.


Asunto(s)
Desarrollo de Medicamentos/métodos , Descubrimiento de Drogas/métodos , Edición Génica/métodos , Metabolómica/métodos , Fenómenos Microbiológicos , Metabolismo Secundario , Alcaloides/metabolismo , Antimitóticos/metabolismo , Productos Biológicos , Sistemas CRISPR-Cas , Bases de Datos Factuales , Eliminación de Gen , Ingeniería Genética/métodos , Análisis Multivariante , Mutagénesis Insercional , Pigmentos Biológicos/metabolismo , Toxinas Biológicas/metabolismo
10.
J Environ Manage ; 210: 10-22, 2018 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-29329004

RESUMEN

The persistent disposal of xenobiotic compounds like insecticides, pesticides, fertilizers, plastics and other hydrocarbon containing substances is the major source of environmental pollution which needs to be eliminated. Many contemporary remediation methods such as physical, chemical and biological are currently being used, but they are not sufficient to clean the environment. The enzyme based bioremediation is an easy, quick, eco-friendly and socially acceptable approach used for the bioremediation of these recalcitrant xenobiotic compounds from the natural environment. Several microbial enzymes with bioremediation capability have been isolated and characterized from different natural sources, but less production of such enzymes is a limiting their further exploitation. The genetic engineering approach has the potential to get large amount of recombinant enzymes. Along with this, enzyme immobilization techniques can boost the half-life, stability and activity of enzymes at a significant level. Recently, nanozymes may offer the potential bioremediation ability towards a broad range of pollutants. In the present review, we have described a brief overview of the microbial enzymes, different enzymes techniques (genetic engineering and immobilization of enzymes) and nanozymes involved in bioremediation of toxic, carcinogenic and hazardous environmental pollutants.


Asunto(s)
Biodegradación Ambiental , Contaminantes Ambientales , Enzimas/metabolismo , Hidrocarburos , Plaguicidas , Tecnología
11.
J Biol Chem ; 289(43): 29712-27, 2014 Oct 24.
Artículo en Inglés | MEDLINE | ID: mdl-25179220

RESUMEN

The dopamine transporter (DAT) functions as a key regulator of dopaminergic neurotransmission via re-uptake of synaptic dopamine (DA). Cocaine binding to DAT blocks this activity and elevates extracellular DA, leading to psychomotor stimulation and addiction, but the mechanisms by which cocaine interacts with DAT and inhibits transport remain incompletely understood. Here, we addressed these questions using computational and biochemical methodologies to localize the binding and adduction sites of the photoactivatable irreversible cocaine analog 3ß-(p-chlorophenyl)tropane-2ß-carboxylic acid, 4'-azido-3'-iodophenylethyl ester ([(125)I]RTI 82). Comparative modeling and small molecule docking indicated that the tropane pharmacophore of RTI 82 was positioned in the central DA active site with an orientation that juxtaposed the aryliodoazide group for cross-linking to rat DAT Phe-319. This prediction was verified by focused methionine substitution of residues flanking this site followed by cyanogen bromide mapping of the [(125)I]RTI 82-labeled mutants and by the substituted cysteine accessibility method protection analyses. These findings provide positive functional evidence linking tropane pharmacophore interaction with the core substrate-binding site and support a competitive mechanism for transport inhibition. This synergistic application of computational and biochemical methodologies overcomes many uncertainties inherent in other approaches and furnishes a schematic framework for elucidating the ligand-protein interactions of other classes of DA transport inhibitors.


Asunto(s)
Azidas/metabolismo , Cocaína/análogos & derivados , Proteínas de Transporte de Dopamina a través de la Membrana Plasmática/metabolismo , Simulación del Acoplamiento Molecular , Animales , Azidas/química , Sitios de Unión , Cocaína/química , Cocaína/metabolismo , Bromuro de Cianógeno/metabolismo , Células HeLa , Humanos , Células LLC-PK1 , Ligandos , Mesilatos/metabolismo , Simulación de Dinámica Molecular , Proteínas Mutantes/química , Proteínas Mutantes/metabolismo , Ratas , Especificidad por Sustrato , Porcinos
12.
Folia Microbiol (Praha) ; 69(1): 181-206, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-37747637

RESUMEN

Endophytic microbes are plant-associated microorganisms that reside in the interior tissue of plants without causing damage to the host plant. Endophytic microbes can boost the availability of nutrient for plant by using a variety of mechanisms such as fixing nitrogen, solubilizing phosphorus, potassium, and zinc, and producing siderophores, ammonia, hydrogen cyanide, and phytohormones that help plant for growth and protection against various abiotic and biotic stresses. The microbial endophytes have attained the mechanism of producing various hydrolytic enzymes such as cellulase, pectinase, xylanase, amylase, gelatinase, and bioactive compounds for plant growth promotion and protection. The efficient plant growth promoting endophytic microbes could be used as an alternative of chemical fertilizers for agro-environmental sustainability. Endophytic microbes belong to different phyla including Euryarchaeota, Ascomycota, Basidiomycota, Mucoromycota, Firmicutes, Proteobacteria, and Actinobacteria. The most pre-dominant group of bacteria belongs to Proteobacteria including α-, ß-, γ-, and δ-Proteobacteria. The least diversity of the endophytic microbes have been revealed from Bacteroidetes, Deinococcus-Thermus, and Acidobacteria. Among reported genera, Achromobacter, Burkholderia, Bacillus, Enterobacter, Herbaspirillum, Pseudomonas, Pantoea, Rhizobium, and Streptomyces were dominant in most host plants. The present review deals with plant endophytic diversity, mechanisms of plant growth promotion, protection, and their role for agro-environmental sustainability. In the future, application of endophytic microbes have potential role in enhancement of crop productivity and maintaining the soil health in sustainable manner.


Asunto(s)
Ascomicetos , Bacillus , Basidiomycota , Endófitos , Bacterias/genética
13.
Heliyon ; 10(16): e35980, 2024 Aug 30.
Artículo en Inglés | MEDLINE | ID: mdl-39229543

RESUMEN

Over recent years, the scientific community has acknowledged the crucial role of certain microbial strains inhabiting the intestinal ecosystem in promoting human health, and participating in various beneficial functions for the host. These microorganisms are now referred to as next-generation probiotics and are currently considered as biotherapeutic products and food or nutraceutical supplements. However, the majority of next-generation probiotic candidates pose nutritional demands and exhibit high sensitivity towards aerobic conditions, leading to numerous technological hurdles in large-scale production. This underscores the need for the development of suitable delivery systems capable of enhancing the viability and functionality of these probiotic strains. Currently, potential candidates for next generation probiotics (NGP) are being sought among gut bacteria linked to health, which include strains from the genera Bacteroids, Faecalibacterium, Akkermansia and Clostridium. In contrast to Lactobacillus spp. and Bifidobacterium spp., NGP, particularly Bacteroids spp. and Clostridium spp., appear to exhibit greater ambiguity regarding their potential to induce infectious diseases. The present review provides a comprehensive overview of NGPs in terms of their health beneficial effects, regulation framework and risk assessment targeting relevant criteria for commercialization in food and pharmaceutical markets.

14.
J Addict Med ; 17(2): e78-e86, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36001065

RESUMEN

BACKGROUND AND AIMS: Multiple substance use is a common but underrecognized problem in patients on opioid agonist treatment (OAT). Co-occurring substance misuse is associated with poor clinical and psychosocial outcomes. We aimed ( a ) to determine the effect of screening and brief intervention (SBI) for substance misuse in people on OAT and (b) to qualitatively summarize the implementation of SBI. METHODS: We performed a systematic review of clinical trials on the efficacy of SBI for alcohol and drug misuse in participants on OAT. We searched 5 electronic databases and included published studies and unpublished trials. We measured the standardized mean difference in substance risk scores before and after intervention. We also estimated the standardized mean difference in alcohol consumption per day before and after intervention. RESULTS: We included a total of 8 studies; 5 of these were included in the meta-analysis, and all were reviewed for narrative synthesis. We observed a significant change in the pre-post brief intervention substance risk scores with a medium effect size (Hedges g = 0.752, 95% confidence interval, 0.405-1.099). Sensitivity analyses with different pretest-posttest correlations did not change our result. Modest effects of SBI were found in reducing both alcohol and illicit drug risk scores, and among the population on methadone and buprenorphine treatment. We also observed a significant decrease in alcohol consumption per day 3 months after SBI. Studies showed a limited and incomplete screening for substance misuse and delivery of brief intervention in OAT settings. CONCLUSIONS: Screening and brief intervention may be a potential treatment for co-occurring substance misuse among patients on OAT.


Asunto(s)
Consumidores de Drogas , Trastornos Relacionados con Sustancias , Humanos , Intervención en la Crisis (Psiquiatría) , Analgésicos Opioides/uso terapéutico , Trastornos Relacionados con Sustancias/epidemiología , Trastornos Relacionados con Sustancias/terapia , Trastornos Relacionados con Sustancias/complicaciones , Consumo de Bebidas Alcohólicas/prevención & control
15.
Environ Sci Pollut Res Int ; 30(28): 71813-71825, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-34622409

RESUMEN

The leachates emanating from the landfills are high in organic loads and thus become potential sources of contamination for both surface and groundwater. As the landfill ages, the nature of leachate changes from acidic to alkaline. The change in pH level affects the chemical oxygen demand (COD)/biochemical oxygen demand (BOD) ratio and when it is less than 0.63, chemical treatments are more effective over the biological treatment methods such as upflow anaerobic sludge blankets (UASB). The existing literature suggests coagulation-flocculation and advanced oxidation process (Fenton) as effective methods for treating wastewater but no comparison of the two are available. Thus, the present study attempts to identify the most efficient coagulants out of ferric chloride (FeCl3), ferrous sulphate (FeSO4) and alum [Al2(SO4)3]. Ferric chloride leading to 99% colour removal, 98% COD removal, 99% decrease in total organic carbon, 94.3% removal in NH3-N and 91.4% removal in total Kjeldahl nitrogen is observed to be the most efficient coagulant and surprisingly, proves to be even better than Fenton. To understand the field applicability of the two treatment procedures, coagulation with FeCl3 and Fenton are compared with the UASB method which is currently employed at Gazipur landfill site, Delhi. With lesser operational cost than UASB, both FeCl3 and Fenton perform better on cost-efficiency scale. Switching from in-suit UASB method to the FeCl3 method of treatment may result in decreasing the operational cost by 71.9% and to conventional Fenton may result in decreasing the operational cost by 76.8%.


Asunto(s)
Eliminación de Residuos Líquidos , Contaminantes Químicos del Agua , Eliminación de Residuos Líquidos/métodos , Contaminantes Químicos del Agua/análisis , Compuestos Férricos , Instalaciones de Eliminación de Residuos
16.
Int J Soc Psychiatry ; 68(1): 44-54, 2022 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-33251923

RESUMEN

BACKGROUND: The content and nature of media reports could influence suicide prevention measures. AIM: To evaluate contemporary online media reports' compliance with guidelines for responsible reporting of suicidal acts from Indian resources. METHODS: We included English and Hindi articles for reports concerning suicide, published by local and national media sources for 30 consecutive days from the day of death of a celebrity by alleged suicide. The search was performed in Google News with predefined search queries and selection criteria. Two independent investigators did data extraction. Subsequently, each news report was assessed against guidelines for the responsible reporting of suicide by the WHO and the Press Council of India. RESULTS: We identified 295 articles (Hindi n = 172, English n = 123). Results showed more than 80% of the media reports deviated from at least one criterion of the recommendations. A maximum breach was seen in the news article's headlines, sensational reportage and detailed suicide methods description. Significant differences were seen in the quality of English and Hindi reporting and reporting celebrity and noncelebrity suicide. Additional items revealed were reporting suicide pacts, linking multiple suicides in a single news report, allowing user-generated threads and linking Religion and suicide. CONCLUSION: Measures are required to implement reporting recommendations in the framework of a national suicide prevention strategy.


Asunto(s)
Prevención del Suicidio , Estudios Transversales , Humanos , India , Medios de Comunicación de Masas , Ideación Suicida
17.
J Psychoactive Drugs ; : 1-10, 2022 Nov 09.
Artículo en Inglés | MEDLINE | ID: mdl-36352558

RESUMEN

Cannabis misuse and opioid use disorder (OUD) are highly comorbid but under-treated and associated with poorer outcomes. This paper reports a double-blind, parallel-group randomized controlled trial to determine the efficacy of single-session, clinician-delivered screening and brief intervention (SBI) for reducing cannabis risk. The primary outcome was the cannabis-specific Alcohol, Smoking, and Substance Involvement Screening Test (ASSIST) scores, measured at three-month post-intervention. The secondary objectives were to determine the efficacy of SBI in reducing the frequency of cannabis use, in risk transition from moderate to low risk, and in prescription and non-prescription opioid use. One hundred forty-three participants were randomly allocated to receive either SBI (n = 72) or control (n = 71) interventions. We performed Per-protocol (PP) (n = 125) and Intention-to-treat (ITT) analysis (n = 143). We adjusted our analysis for age, sex, and baseline ASSIST score. The ITT showed that the SBI group had a significant reduction (F = 39.46, p < .001, Effect size 0.22) in the mean ASSIST at follow-up. PP analyses too revealed a similar positive effect of SBI (F = 53.1; p < .001, Effect size 0.31). At follow-up, the SBI group had a higher number of days of cannabis abstinence. Care providers and policymakers may consider SBI for cannabis use in individuals on medications for OUD.

18.
PLoS One ; 17(5): e0265993, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35536839

RESUMEN

BACKGROUND: Nepal has implemented the social health security program in certain health facilities to improve access to quality health services. The aim of the study is to understand the utilization pattern of social health security schemes and community's perception of the social health security program. METHOD: A descriptive cross-sectional mixed-method study was conducted among 300 households of Illam district who had enrolled in the social health security scheme. A multi-stage random sampling method was used. A semi-structured questionnaire was used to collect quantitative data whereas focus group discussions (FGDs) were conducted for qualitative data. Descriptive analysis, bivariate and multivariate analysis was done. FGDs were transcribed and thematic analysis was done. FINDINGS: The utilization rate of social health security scheme was 88.7%. Factors associated with the utilization of program included: presence of under-five children and chronic illness in households, sex and age group. Focus group discussion revealed that people were aware of social health insurance and pleased with program implemented by government. However, the hospitals under the social health insurance were not able to meet their expectations. CONCLUSION: Although the utilization of social health security scheme was high, people were dissatisfied with the service provided by the hospital under the social health security scheme. Therefore, the social health insurance board should closely monitor the hospitals and develop a feedback mechanism from the users.


Asunto(s)
Composición Familiar , Seguro de Salud , Niño , Estudios Transversales , Humanos , Renta , Nepal
19.
J Vis Exp ; (181)2022 03 01.
Artículo en Inglés | MEDLINE | ID: mdl-35312674

RESUMEN

Melanocytes are specialized neural crest-derived cells present in the epidermal skin. These cells synthesize melanin pigment that protects the genome from harmful ultraviolet radiations. Perturbations in melanocyte functioning lead to pigmentary disorders such as piebaldism, albinism, vitiligo, melasma, and melanoma. Zebrafish is an excellent model system to understand melanocyte functions. The presence of conspicuous pigmented melanocytes, ease of genetic manipulation, and availability of transgenic fluorescent lines facilitate the study of pigmentation. This study employs the use of wild-type and transgenic zebrafish lines that drive green fluorescent protein (GFP) expression under mitfa and tyrp1 promoters that mark various stages of melanocytes. Morpholino-based silencing of candidate genes is achieved to evaluate the phenotypic outcome on larval pigmentation and is applicable to screen for regulators of pigmentation. This protocol demonstrates the method from microinjection to imaging and fluorescence-activated cell sorting (FACS)-based dissection of phenotypes using two candidate genes, carbonic anhydrase 14 (Ca14) and a histone variant (H2afv), to comprehensively assess the pigmentation outcome. Further, this protocol demonstrates segregating candidate genes into melanocyte specifiers and differentiators that selectively alter melanocyte numbers and melanin content per cell, respectively.


Asunto(s)
Trastornos de la Pigmentación , Pez Cebra , Animales , Melanocitos/metabolismo , Pigmentación/genética , Genética Inversa , Pez Cebra/genética
20.
J Hazard Mater ; 401: 123285, 2021 01 05.
Artículo en Inglés | MEDLINE | ID: mdl-32659573

RESUMEN

This study explores the soil microorganisms for their Lead bioremediation capability. The MIC values of the six Lead resistant bacteria were evaluated, and the AAS studies of these isolates estimated their Lead accumulation percentage. The results showed that the isolate namely Bacillus cereus BPS-9 as identified based on 16S rDNA gene sequences was shown to have the highest Lead accumulation potential (79.26 %) and also selected for bioaccumulation studies. Despite the reduction in growth rate, the superoxide dismutase activity of B. cereus BPS-9 was increased with a rise in the concentration of Lead manifested through increased nitro-blue tetrazolium (NBT) reduction from 3.94 % to 77.48 %. Moreover, the biosorption capacity of B. cereus BPS-9 was 193.93 mg/g and the Langmuir isotherm model showed a value of R2 = 0.9. Furthermore, the FTIR analysis also established the role of C-H, C=C, N=N, N-H, and C-O functional groups in Lead adsorption and the SEM micrographs showed that the cells of B. cereus BPS-9 became dense, adhered and distorted after Lead adsorption. Finally, the In-silico results obtained by functional analysis through SEED viewer of the whole genome of B. cereus deciphered the presence of genes encoding heavy metal resistant proteins and transporters for the efflux of heavy metals.


Asunto(s)
Residuos Industriales , Metales Pesados , Bacillus cereus/genética , Bioacumulación , Biodegradación Ambiental , Plomo/toxicidad , Metales Pesados/toxicidad
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA