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1.
J Hazard Mater ; 469: 133961, 2024 May 05.
Artigo em Inglês | MEDLINE | ID: mdl-38490148

RESUMO

Aeration of sediments could induce the release of endogenous heavy metals (HMs) into overlying water. In this study, experiments involving FeS oxygenation and contaminated sediment aeration were conducted to explore the sequestering role of zeolite in the released HMs during sediment aeration. The results reveal that the dynamic processes of Fe(II) oxidation play a crucial role in regulating HMs migration during both FeS oxygenation and sediment aeration in the absence of zeolite. Based on the release of HMs, Fe(II) oxidation can be delineated into two stages: stage I, where HMs (Mn2+, Zn2+, Cd2+, Ni2+, Cu2+) are released from minerals or sediments into suspension, and stage II, released HMs are partially re-sequestered back to mineral phases or sediments due to the generation of Fe-(oxyhydr) oxide. In contrast, the addition of zeolite inhibits the increase of HMs concentration in suspension during stage I. Subsequently, the redistribution of HMs between zeolite and the newly formed Fe-(oxyhydr) oxide occurs during stage II. This redistribution of HMs generates new sorption sites in zeolite, making them available for resorbing a new load of HMs. The outcomes of this study provide potential solutions for sequestering HMs during the sediment aeration.

2.
J Hazard Mater ; 461: 132467, 2024 01 05.
Artigo em Inglês | MEDLINE | ID: mdl-37716266

RESUMO

Glyphosate is the most commonly used herbicide in the United States. In the environment, glyphosate residues can either degrade into more toxic and persistent byproducts such as aminomethylphosphonic acid (AMPA) or environmentally benign species such as sarcosine or glycine. In this research, the birnessite-catalyzed degradation of glyphosate was studied under environmentally relevant temperatures (10-40 °C) using high-performance liquid chromatography, inductively coupled plasma mass spectrometry, nuclear magnetic resonance, and theoretical calculations. Our results show a temperature-dependent degradation pathway preference for AMPA and glycine production. The AMPA and glycine pathways are competitive at short reaction times, but the glycine pathway became increasingly preferred as reaction time and temperature increased. The measured free energy barriers are comparable for both the glycine and AMPA pathways (93.5 kJ mol-1 for glycine and 97.1 kJ mol-1 for AMPA); however, the entropic energy penalty for the AMPA pathway is significantly greater than the glycine pathway (-TΔS‡ = 26.2 and 42.8 kJ mol-1 for glycine and AMPA, respectively). These findings provide possible routes for biasing glyphosate degradation towards safer products, thus to decrease the overall environmental toxicity.


Assuntos
Glicina , Herbicidas , Temperatura , Ácido alfa-Amino-3-hidroxi-5-metil-4-isoxazol Propiônico , Glicina/química , Óxidos , Herbicidas/química , Tetrazóis , Glifosato
3.
Environ Sci Technol ; 57(38): 14384-14395, 2023 09 26.
Artigo em Inglês | MEDLINE | ID: mdl-37694860

RESUMO

Ferrihydrite is one of the most reactive iron (Fe) (oxyhydr)oxides in soils, but the adsorption mechanisms of glyphosate, the most widely used herbicide, on ferrihydrite remain unknown. Here, we determined the adsorption mechanisms of glyphosate on pristine and Al-substituted ferrihydrites with aggregated and dispersed states using macroscopic adsorption experiments, zeta potential, phosphorus K-edge X-ray absorption near-edge structure spectroscopy, in situ attenuated total reflectance Fourier transform infrared spectroscopy coupled with two-dimensional correlation spectroscopy, and multivariate curve resolution analyses. Aggregation of ferrihydrite decreases the glyphosate adsorption capacity. The partial substitution of Al in ferrihydrite inhibits glyphosate adsorption on aggregated ferrihydrite due to the decrease of external specific surface area, while it promotes glyphosate adsorption on dispersed ferrihydrite, which is ascribed to the increase of surface positive charge. Glyphosate predominately forms protonated and deprotonated, depending on the sorption pH, monodentate-mononuclear complexes (MMH1/MMH0, 77-90%) on ferrihydrites, besides minor deprotonated bidentate-binuclear complexes (BBH0, 23-10%). Both Al incorporation and a low pH favor the formation of the BB complex. The adsorbed glyphosate preferentially forms the MM complex on ferrihydrite and preferentially bonds with the Al-OH sites on Al-substituted ferrihydrite. These new insights are expected to be useful in predicting the environmental fate of glyphosate in ferrihydrite-rich environments.


Assuntos
Herbicidas , Ferro , Adsorção , Glifosato
4.
PLoS Negl Trop Dis ; 17(8): e0011572, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-37639403

RESUMO

BACKGROUND: Snakebite envenoming is a well-known medical emergency in the Terai of Nepal in particular. However, there is an epidemiological knowledge gap. The news media data available online provide substantial information on envenomings. Assessing this information can be a pristine approach for understanding snakebite epidemiology and conducting knowledge-based interventions. We firstly analyzed news media-reported quantitative information on conditions under which bites occur, treatment-seeking behavior of victims, and outcomes of snakebite envenomings in Nepal. METHODOLOGY/PRINCIPAL FINDINGS: We analyzed 308 Nepalese snakebite envenomed cases reported in 199 news media articles published between 2010 and 2022 using descriptive statistics, Wilcoxon, and Chi-square tests to know why and how victims were bitten, their treatment-seeking behavior, and the outcomes. These envenomated cases known with substantial information represented 48 districts (mostly located in the Terai region) of Nepal. These envenomings mostly occurred in residential areas affecting children. Generally, envenomings among males and females were not significantly different. But, in residential areas, females were more envenomed than males. Further, victims' extremities were often exposed to venomous snakebites while their active status and these episodes often occurred at night while victims were passive during snakebites indoors and immediate surroundings of houses. Snakebite deaths were less among referred than non-referred cases, males than females, and while active than passive conditions of victims. CONCLUSION/SIGNIFICANCE: The most of reported envenomed patients were children, and most envenomings were due to cobra bites. Consultation with traditional healers complicated snakebite management. In most cases, deaths that occur without medical interventions are a severe snakebite consequence in Nepal. Further, several deaths in urban areas and mountains and higher hills of Nepal suggest immediate need of snakebite management interventions in the most affected districts. Therefore, there is an urgent need to immediately admit Nepalese snakebite victims to nearby snakebite treatment centers without adopting non-recommended prehospital interventions. The strategies for preventing snakebite and controlling venom effects should also include hilly and mountain districts where snakebite-associated deaths are reported.


Assuntos
Mordeduras de Serpentes , Feminino , Humanos , Masculino , Povo Asiático , Extremidades , Hospitalização , Nepal/epidemiologia , Mordeduras de Serpentes/epidemiologia , Mordeduras de Serpentes/terapia
5.
Water Res ; 241: 120134, 2023 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-37262944

RESUMO

The expansion of algal bloom in surface waters is a global problem in the freshwater ecosystem. Differential reactivity of organic phosphorus (Po) compounds from organic debris, suspended particulate matter (SPM), and sediment towards hydrolysis can dictate the extent of supply often limited inorganic P (Pi) for algal growth, thereby controlling the extent of bloom. Here, we combined solution P-31 nuclear magnetic resonance (31P NMR), sequential extraction, enzymatic hydrolysis, and 16S rRNA measurements to characterize speciation and biogeochemical cycling of P in Lake Erhai, China. Lower ratios of diester-P/monoester-P in SPM in January (mean 0.09) and July (0.14) than that in April (0.29) reflected the higher degree of diester-P remineralization in cold and warm months. Both H2O-Pi and Po were significantly higher in SPM (mean 1580 mg ·kg-1 and 1618 mg ·kg-1) than those in sediment (mean 8 mg ·kg-1 and 387 mg ·kg-1). In addition, results from enzymatic hydrolysis experiments demonstrated that 61% Po in SPM and 58% in sediment in the H2O, NaHCO3, and NaOH extracts could be hydrolyzed. These results suggested that H2O-Pi and Po from SPM were the primarily bioavailable P sources for algae. Changes of Pi contents (particularly H2O-Pi) in algae and alkaline phosphatase activity (APA) during the observation periods were likely to be controlled by the strategies of P uptake and utilization of algae. P remobilization/remineralization from SPM likely resulted from algae and bacteria (e.g., Pseudomonas). Collectively, these results provide important insights that SPM P could sustain the algal blooms even if the dissolved P was depleted in the water column.


Assuntos
Fósforo , Poluentes Químicos da Água , Fósforo/química , Ecossistema , Lagos/química , RNA Ribossômico 16S , Sedimentos Geológicos/química , Poluentes Químicos da Água/química , Eutrofização , Material Particulado
6.
SAGE Open Med Case Rep ; 11: 2050313X231157985, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36860306

RESUMO

Locally prepared liquor, which is not standardized or regulated, though cheap can contain various toxic ingredients and even may be fatal. We report a case series of four adult males who died within 18.5 h due to the effect of local liquor consumption in a hilly district of Gandaki Province of Nepal. Methanol toxicity due to illicitly produced alcohol consumption should be managed with adequate supportive care and administration of specific antidotes such as ethanol or fomepizole. Liquor production should be standardized, and quality checks should be done before the sale for consumption.

7.
Microb Ecol ; 86(3): 1513-1533, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36752910

RESUMO

Lake Villarrica, one of Chile's main freshwater water bodies, was recently declared a nutrient-saturated lake due to increased phosphorus (P) and nitrogen (N) levels. Although a decontamination plan based on environmental parameters is being established, it does not consider microbial parameters. Here, we conducted high-throughput DNA sequencing and quantitative polymerase chain reaction (qPCR) analyses to reveal the structure and functional properties of bacterial communities in surface sediments collected from sites with contrasting anthropogenic pressures in Lake Villarrica. Alpha diversity revealed an elevated bacterial richness and diversity in the more anthropogenized sediments. The phylum Proteobacteria, Bacteroidetes, Acidobacteria, and Actinobacteria dominated the community. The principal coordinate analysis (PCoA) and redundancy analysis (RDA) showed significant differences in bacterial communities of sampling sites. Predicted functional analysis showed that N cycling functions (e.g., nitrification and denitrification) were significant. The microbial co-occurrence networks analysis suggested Chitinophagaceae, Caldilineaceae, Planctomycetaceae, and Phycisphaerae families as keystone taxa. Bacterial functional genes related to P (phoC, phoD, and phoX) and N (nifH and nosZ) cycling were detected in all samples by qPCR. In addition, an RDA related to N and P cycling revealed that physicochemical properties and functional genes were positively correlated with several nitrite-oxidizing, ammonia-oxidizing, and N-fixing bacterial genera. Finally, denitrifying gene (nosZ) was the most significant factor influencing the topological characteristics of co-occurrence networks and bacterial interactions. Our results represent one of a few approaches to elucidate the structure and role of bacterial communities in Chilean lake sediments, which might be helpful in conservation and decontamination plans.


Assuntos
Bactérias , Lagos , Humanos , Lagos/microbiologia , Chile , Bactérias/genética , Proteobactérias/genética , Genes Bacterianos , Bacteroidetes/genética , Sedimentos Geológicos/microbiologia
8.
Trans R Soc Trop Med Hyg ; 117(3): 219-228, 2023 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-36366978

RESUMO

BACKGROUND: Traditional healers are a valuable source of information about community-level treatment of snakebite. Snakebite victims in Nepal depend on traditional healers for treatment, but their practices have not been well-documented. METHODS: This was a cross-sectional study of 50 traditional snakebite healers (TSHs) who were selected using a snowball sampling method representing eight districts and four provinces of Nepal. Data were collected using face-to-face-interviews and semi-structured questionnaires. RESULTS: About half of the respondents liked to gain knowledge on modern care for snakebite management and nearly all respondents (94%) wished to cooperate closely with the local healthcare system to support snakebite management. People's ingrained faith in traditional healing of snakebite (84%), unaffordable modern care of snakebite (60%) and wishes for early treatment of snakebites (44-48%) were the main causes of their dependency on TSHs. Rauvolfia serpentina, Piper nigrum, Momordica charantia and Tinospora cordifolia were commonly used plants in traditional treatment of snakebite. CONCLUSIONS: Easily accessible and affordable healthcare facilities provided by TSHs, public beliefs in traditional healing and inadequate knowledge of antivenom therapy caused dependency on TSHs. The introduction of snakebite treatment centres in snakebite-prone regions and educational interventions are essential to minimize this kind of dependency and associated deaths and disabilities.


Assuntos
Mordeduras de Serpentes , Humanos , Mordeduras de Serpentes/terapia , Estudos Transversais , Nepal , Antivenenos , Inquéritos e Questionários
9.
Mymensingh Med J ; 31(4): 947-953, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36189537

RESUMO

Fibrocalculous pancreatic diabetes (FCPD) is a secondary form of diabetes mellitus occurring primarily in tropical countries like Bangladesh and has distinct characteristics. The present study aimed to describe the demographic, clinical and biochemical characteristics of patients with FCPD. This cross-sectional study was conducted at Mymensingh Medical College Hospital, Bangladesh, from January 2019 to December 2021. All patients with FCPD (previously or newly diagnosed) admitted to the inpatient Endocrinology department of the hospital were evaluated. Out of the 15 patients, 73.3% were aged 10-29 years at diagnosis, the male: female ratio was 11:4, rural: urban ratio was 9:6, 20.0% had FCPD in the first-degree family members, 73.3% were underweight, none were overweight/obese or central obese and one of them was hypertensive. Diabetes was uncontrolled in all, with a mean HbA1c of 10.5±1.9%. All but one had low C-peptide and all required insulin to manage diabetes. Although their average (mean or median) lipid parameters were normal, 73.3% of them had dyslipidemia. Among diabetic complications, diabetic nephropathy (66.7%) and neuropathy (66.7%) were more frequent, whereas diabetic retinopathy (6.7%), ischemic heart disease (6.7%) and peripheral vascular disease (6.7%) were less frequently observed; 13.3% had a history of diabetic ketoacidosis. Malnutrition manifested as abnormal skin and hair conditions and anemia was also common in the study subjects. Patients with FCPD are usually young males from rural residences. Microvascular diabetic complications are common, but macrovascular complications and DKA can occur in FCPD.


Assuntos
Complicações do Diabetes , Diabetes Mellitus , Bangladesh/epidemiologia , Peptídeo C , Estudos Transversais , Demografia , Diabetes Mellitus/epidemiologia , Feminino , Hemoglobinas Glicadas/análise , Humanos , Lipídeos , Masculino , Obesidade/complicações
10.
J Environ Manage ; 320: 115906, 2022 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-36056497

RESUMO

Phosphorus (P) cycling by microbial activity is highly relevant in the eutrophication of lakes. In this context, the contents of organic (Po) and inorganic (Pi) phosphorus, the activity of acid (ACP) and alkaline (ALP) phosphomonoesterase (Pase), and the abundances of bacterial Pase genes (phoD, phoC, and phoX) were studied in sediments from Budi Lake, a eutrophic coastal brackish water lake in Chile. Our results showed spatiotemporal variations in P fractions, Pase activities, and Pase gene abundances. In general, our results showed higher contents of Pi (110-144 mg kg-1), Po (512-576 mg kg-1), and total P (647-721 mg kg-1) in sediments from the more anthropogenized sampling sites in summer compared with those values of Pi (86-127 mg kg-1), Po (363-491 mg kg-1) and total P (449-618 mg kg-1) in less anthropogenized sampling sites in winter. In concordance, sediments showed higher Pase activities (µg nitrophenyl phosphate g-1 h-1) in sediments from the more anthropogenized sampling sites (9.7-22.7 for ACP and 5.9 to 9.6 for ALP) compared with those observed in less anthropogenized sampling sites in winter (4.2-12.9 for ACP and 0.3 to 6.7 for ALP). Higher abundances (gene copy g-1 sediment) of phoC (8.5-19 × 108), phoD (9.2-47 × 106), and phoX (8.5-26 × 106) genes were also found in sediments from the more anthropogenized sampling sites in summer compared with those values of phoC (0.1-1.1 × 108), phoD (1.4-2.4 × 106) and phoX (0.7-1.2 × 106) genes in the less anthropogenized sites in winter. Our results also showed a positive correlation between P contents, Pase activities, and abundances of bacterial Pase genes, independent of seasonality. The present study provided information on the microbial activity involved in P cycling in sediments of Budi Lake, which may be used in further research as indicators for the monitoring of eutrophication of lakes.


Assuntos
Lagos , Poluentes Químicos da Água , Chile , China , Monitoramento Ambiental/métodos , Eutrofização , Sedimentos Geológicos , Monoéster Fosfórico Hidrolases , Fósforo/análise , Águas Salinas , Poluentes Químicos da Água/análise
11.
NanoImpact ; 28: 100422, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-36041682

RESUMO

Potential use of hydroxyapatite nanoparticles (HANPs) [Ca10(PO4)6(OH)2] as slow P-release fertilizer (SRF) has recently attracted wider attention. However, commercially available HANP (with Ca/P ratio = 1.667) is the least soluble calcium phosphate and thus limits its full potential as an SRF in agronomic applications. In this research, we sought to enhance the dissolution rate of HANPs by enriching hydrogen phosphate (HPO42-) species in the phosphate (PO43-) structural sites. Seven different types of pure crystalline HANPs were synthesized at a range of Ca/P ratio from 1.46 (at pH 6.0) to 2.10 (at pH 12.0). Complementary results from FTIR and solid-state 31P MAS NMR spectroscopies showed that HPO42- species is most abundant in HANPs crystallized at pH 6.0 and gradually depleted at higher pH products. The rate of depletion of HPO42- species is proportional to the increase in carbonate incorporation into the HANP lattice, which preferentially forms B-type carbonated HANPs. The enhanced dissolution rate of HANPs due to hydrogen phosphate incorporation was tested using a flow-through macro-dialysis system that limits the partial transition of HANPs to other solid phases, which otherwise interfere with dissolution. The results show that the dissolution rate of HANPs increased with decreasing pH of synthesis and was highest in HANPs at pH 6.0. The dissolution rate differed by ten times between HANPs synthesized at pH 7.0 and 10.0. Overall, the atom-efficient synthetic route developed and the ability to tune the dissolution rate of HANPs are significant steps forward in improving the P-release efficiency of a potent SRF and is expected to contribute to efforts toward enhancing agricultural sustainability.


Assuntos
Apatitas , Fosfatos , Hidrogênio
12.
Mymensingh Med J ; 31(1): 263-266, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34999713

RESUMO

Noonan syndrome is a genetic disorder of autosomal dominant inheritance that prevents normal development in various parts of the body. A spontaneous mutation without any family history may also result in the condition. Noonan syndrome can affect normal growth. Birth weight may be normal, but growth slows over time. The growth spurt usually seen during the teenage years may be delayed, and bone maturity also is delayed. In this case A 13 year's male admitted inpatient Department of Endocrinology, Mymensingh Medical College Hospital in April 2021 with not attaining appropriate height and delayed development of secondary sexual characteristics. His birth weight was normal; gestational and neonatal history was uneventful. He was diagnosed with severe pulmonary stenosis at four years and underwent cardiac surgery at his four and eleven years. He was noted to have growth failure from the age of 9 years onward. He had no family history of such type of disease. On examination, he was short statured, underweight, having an upper: lower segment ratio of 1.05 with an arm span of 126cm. He had craniosynostosis, high arched palate, the thick helix of ears (outer rim), small, upturned nose, depressed broad nose, deeply grooved philtrum, keratosis pilaris of the face and upper arm, slant eyes with proptosis, keloid scar over mid-chest, widely spaced nipple, shield chest, pectus excavatum and cubitus valgus. His sexual maturation score was A1, P1, B1. He had pulmonary stenosis with pulmonary hypertension. He had mild microcytic anemia with normal liver, renal, blood glucose, and calcium profile. His bone age was delayed (9 years), thyroid function was normal. The growth hormone dynamic test after clonidine stimulation was normal. His karyotype was 46XY. We have considered giving recombinant growth hormone therapy to accelerate his height.


Assuntos
Anormalidades Múltiplas , Doença de Darier , Síndrome de Noonan , Adolescente , Criança , Sobrancelhas , Transtornos do Crescimento , Humanos , Recém-Nascido , Masculino , Síndrome de Noonan/diagnóstico , Síndrome de Noonan/genética
13.
J Assoc Physicians India ; 70(1): 11-12, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-35062813

RESUMO

Rheumatic Fever (RF)/ Rheumatic Heart Disease (RHD) is the result of autoimmune response triggered by group A Beta-haemolytic streptococcal pharyngitis leading to immune-inflammatory injury to cardiac valves. It is practically disappeared in developed countries. However, it continues to be a major cause of disease burden among children, adolescents, and young adults in low-income countries and even in high-income countries with socioeconomic inequalities. For decades, many cases of Acute Rheumatic Fever (ARF) and RHD were missed and were denied the secondary prophylaxis, as a result these patients used to end up with complications and untimely death. Advanced understanding of the echocardiography can prevent both under diagnosis and over diagnosis and thus help in management strategy. Another new advancement in recent past is the mitral valve repair, which is technically demanding, and the results are acceptable in experienced cardiac surgical units. Whenever feasible, valve repair should be preferred over valve replacement since it precludes the need for anticoagulation and future risks of prosthesis dysfunction.


Assuntos
Faringite , Febre Reumática , Cardiopatia Reumática , Adolescente , Criança , Ecocardiografia , Humanos , Índia/epidemiologia , Sobrediagnóstico , Febre Reumática/diagnóstico , Febre Reumática/epidemiologia , Febre Reumática/terapia , Cardiopatia Reumática/diagnóstico , Cardiopatia Reumática/epidemiologia , Cardiopatia Reumática/terapia , Adulto Jovem
14.
Sci Total Environ ; 792: 148353, 2021 Oct 20.
Artigo em Inglês | MEDLINE | ID: mdl-34465044

RESUMO

Eutrophication in coastal water has compromised ecosystem services. Identification of phosphorus (P) sources and their load contributions are required for the development of effective nutrient management plans. In this research, multi-isotope proxies were applied to track P sources and evaluate their relative contributions in Love Creek, a coastal estuary in Delaware. The isotope values of carbon (ca. -22‰), nitrogen (ca.+6‰), and phosphate oxygen (ca.+18‰) of agricultural soils under different agricultural practices are generally similar even though their concentrations are distinctly different from forest soils (δ13C: ca. -27‰; δ13N: ca.+2‰; δ18OP: ca.+22‰). Comparison of these parameters among potential land sources (agricultural soils, forest soils, septic wastes, and plant debris) and sink (colloids in water) revealed that the plant debris and soils from forest sources are likely dominant sources of P in freshwater sites. The contribution of terrestrial P sources gradually decreased along the salinity gradient and agricultural soil sources gradually dominanted in the saline water portion of the creek. The variations of P loads due to weather-related discharge, changing land use and activities, and seasons were high and reflected the limitation of accurate estimation of sources. Overall, these results provide improved insights into potential sources and biogeochemical processes in the estuary, which are expected to be useful for water quality monitoring programs.


Assuntos
Estuários , Fósforo , Ecossistema , Monitoramento Ambiental , Isótopos de Nitrogênio/análise , Fósforo/análise , Salinidade
15.
PLoS One ; 16(8): e0255787, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34388208

RESUMO

Phytate is a dominant form of organic phosphorus (P) in the environment. Complexation and precipitation with polyvalent metal ions can stabilize phytate, thereby significantly hinder the hydrolysis by enzymes. Here, we studied the stability and hydrolyzability of environmentally relevant metal phytate complexes (Na, Ca, Mg, Cu, Zn, Al, Fe, Al/Fe, Mn, and Cd) under different pHs, presence of metal chelators, and thermal conditions. Our results show that the order of solubility of metal phytate complexes is as follows: i) for metal species: Na, Ca, Mg > Cu, Zn, Mn, Cd > Al, Fe, ii) under different pHs: pH 5.0 > pH 7.5), and iii) in the presence of chelators: EDTA> citric acid. Phytate-metal complexes are mostly resistant towards acid hydrolysis (except Al-phytate), and dry complexes are generally stable at high pressure and temperature under autoclave conditions (except Ca phytate). Inhibition of metal complex towards enzymatic hydrolysis by Aspergillus niger phytase was variable but found to be highest in Fe phytate complex. Strong chelating agents such as EDTA are insufficient for releasing metals from the complexes unless the reduction of metals (such as Fe) occurs first. The insights gained from this research are expected to contribute to the current understanding of the fate of phytate in the presence of various metals that are commonly present in agricultural soils.


Assuntos
Complexos de Coordenação/química , Metais/química , Ácido Fítico/química , Alumínio/química , Cádmio/química , Cobre/química , Íons/química , Ferro/química , Magnésio/química , Manganês/química , Fósforo/química , Potássio/química , Sódio/química , Zinco/química
16.
PLoS Negl Trop Dis ; 14(11): e0008793, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-33253152

RESUMO

BACKGROUND: Published information on snakebite is rare in Bhutan although remarkably higher number of snakebites and associated deaths are reported from other South Asian countries. AIMS AND METHODOLOGY: Structured questionnaire was used to collect knowledge of health workers in snakebite management and health seeking behavior of snakebite victims as observed by health workers. Study was conducted in purposively sampled 10 Dzongkhags (district level administrative units) with higher incidence of snakebites. RESULT: Heath workers scored 27-91% (with an average of 63%, SD = 14) for 52 questions related to snake identification and snakebite management. Among 118 health workers interviewed, 23% had adequate knowledge on snakes and snakebite management while 77% had inadequate knowledge. Among 32 Doctors, 63% of them scored above or equal to 75%. Health workers from Sarpang scored higher (76%, SD = 11) than those from other Dzongkhags. Snakebite victim's visit to local (traditional) healers prior to seeking medical help from hospital was observed by 75 (63%) health workers. Fifty one percent of health workers observed patients treated with local methods such as the use of black stone called Jhhar Mauro (believed to absorb snake venom), application of honey, rubbing of green herbal paste made up of Khenpa Shing (Artemisia myriantha Wallich ex Besser var. paleocephala [Pamp] Ling) and consumption of fluid made up of Neem leaf (Azadirachta indica Juss). Use of tight tourniquet as a first aid to snakebite was observed by 80% of the health workers. CONCLUSION: Health workers lack confidence in snakebite management. Snakebite victims are likely to suffer from harmful local practices and traditional beliefs on local treatment practices. Empowering health workers with adequate knowledge on snakebite management and making locals aware in pre-hospital care of snakebites are needed to improve the pre- and in-hospital management of snakebite in Bhutan.


Assuntos
Conhecimentos, Atitudes e Prática em Saúde , Mordeduras de Serpentes/terapia , Serpentes/classificação , Adulto , Animais , Butão , Feminino , Primeiros Socorros , Pessoal de Saúde , Humanos , Masculino , Medicina Tradicional/estatística & dados numéricos , Pessoa de Meia-Idade , Mordeduras de Serpentes/diagnóstico , Inquéritos e Questionários
17.
Int J Biol Macromol ; 164: 53-65, 2020 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-32679332

RESUMO

Nanocellulose Iron Oxide Nanobiocomposites (NIONs) were synthesized from rice husk and sugarcane bagasse derived nanocelluloses for adsorptive removal of arsenic and associated contaminants present in groundwater samples. These NIONSs were superparamagnetic, hence magnetically recoverable and demonstrated promising recyclability. Synthesis of NIONs was confirmed by Transmission electron microscopy (TEM), X-Ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopic (XPS). FTIR and XPS data together with adsorption kinetics provide insights into probable adsorption mechanism of Arsenic by NIONs. The experimental conditions for 10 different variants were modelled using response surface methodology (RSM) based on central composite design (CCD), considering the parameters; adsorbate dosage, adsorbent dosage, pH and contact time. The results identified the best performing variants and the optimal conditions for maximal absorption (~99%). These results were validated using a three-layer feed-forward Multilayer Perceptron (MLP) based Artificial Neural Network (ANN) model. Both RSM and ANN chemometric models were in close conformity for optimized conditions of highest adsorption by specific variants. The standardized conditions were used to expand the study to field-based arsenic contaminated groundwater samples and their performance to commercial adsorbents. NIONs show promising commercial potential for water remediation applications due to their high adsorptive performance, magnetic recoverability and recyclability.


Assuntos
Arsenicais/química , Celulose/química , Compostos Férricos/química , Água Subterrânea/química , Nanopartículas de Magnetita/química , Nanocompostos/química , Resíduos/análise , Poluentes Químicos da Água/química , Purificação da Água/métodos , Adsorção , Modelos Químicos , Oryza , Espectroscopia Fotoeletrônica , Reciclagem , Saccharum , Espectroscopia de Infravermelho com Transformada de Fourier , Difração de Raios X
18.
J Assoc Physicians India ; 68(4): 73-79, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32610855

RESUMO

INTRODUCTION: Hypertension (HTN) is a rapidly growing epidemic in India. It is no larger restricted to older adults as more young Indians are being diagnosed with HTN. Despite its significant prevalence, the awareness, treatment, and control of HTN remain low in India. Thus, early diagnosis is essential to control HTN and prevent future complications. Screening for HTN can help identify undiagnosed and asymptomatic HTN, and thereby the early use of interventions to control the blood pressure (BP). However, no comprehensive guidelines have been established for effective HTN screening in asymptomatic individuals in an Indian setting. OBJECTIVE: To provide consensus recommendations for hypertension screening in India. CONSENSUS RECOMMENDATIONS: Screening for HTN can provide more effective control of HTN and reduce the complications. Experts recommended that the initial age at screening should be 18 years. In individuals at a high risk of HTN, targeted screening can be undertaken. BP measurement using an electronic BP recorder (with at least two readings) are required for identifying HTN during screening. In asymptomatic adults with BP <130/85 mmHg and BP of 130-139/85- 89 mmHg, rescreening should be conducted every 3-5 years and at least every year, respectively. Screening for HTN can be cost effective even when universal screening of the entire population is undertaken. CONCLUSION: The consensus recommendations would increase the awareness of HTN screening. Screening for HTN can provide more effective control of HTN and reduce the complications.


Assuntos
Hipertensão/diagnóstico , Idoso , Pressão Sanguínea , Consenso , Humanos , Hipertensão/epidemiologia , Índia/epidemiologia , Prevalência
19.
Indian Heart J ; 72(2): 70-74, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32534693

RESUMO

The unprecedented and rapidly spreading Coronavirus Disease-19 (COVID-19) pandemic has challenged public health care systems globally. Based on worldwide experience, India has initiated a nationwide lockdown to prevent the exponential surge of cases. During COVID-19, management of cardiovascular emergencies like acute Myocardial Infarction (MI) may be compromised. Cardiological Society of India (CSI) has ventured in this moment of crisis to evolve a consensus document for care of acute MI. However, this care should be individualized, based on local expertise and governmental advisories.


Assuntos
Controle de Doenças Transmissíveis/organização & administração , Infecções por Coronavirus/prevenção & controle , Infarto do Miocárdio/terapia , Avaliação de Resultados em Cuidados de Saúde , Pandemias/prevenção & controle , Pneumonia Viral/prevenção & controle , Guias de Prática Clínica como Assunto/normas , COVID-19 , Cardiologia , Infecções por Coronavirus/epidemiologia , Gerenciamento Clínico , Feminino , Humanos , Índia , Masculino , Infarto do Miocárdio/diagnóstico , Pandemias/estatística & dados numéricos , Seleção de Pacientes , Pneumonia Viral/epidemiologia , Sociedades Médicas/organização & administração , Resultado do Tratamento
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