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During the consumption of alkanes, Alcanivorax borkumensis will form a biofilm around an oil droplet, but the role this plays during degradation remains unclear. We identified a shift in biofilm morphology that depends on adaptation to oil consumption: Longer exposure leads to the appearance of dendritic biofilms optimized for oil consumption effected through tubulation of the interface. In situ microfluidic tracking enabled us to correlate tubulation to localized defects in the interfacial cell ordering. We demonstrate control over droplet deformation by using confinement to position defects, inducing dimpling in the droplets. We developed a model that elucidates biofilm morphology, linking tubulation to decreased interfacial tension and increased cell hydrophobicity.
Assuntos
Alcanivoraceae , Alcanos , Biofilmes , Petróleo , Alcanivoraceae/metabolismo , Alcanos/metabolismo , Petróleo/metabolismo , Biodegradação AmbientalRESUMO
1. The study was carried out to determine the effects of supplementing organic (OG) or inorganic (IOG) Se to record the performance, immune and anti-oxidant response in broiler chickens.2. One-day-old Vencobb-400 (50.1 ± 0.84 g; n = 280) male broiler chicks were allocated randomly into seven treatments to give eight replicates containing five chicks each and housed in deep littered floor pens (76 cm × 91 cm) for a period of 42 d.3. The control diet (CD) was formulated without any Se supplementation (diet I), CD plus 0.15, 0.30 or 0.45 mg/kg OG Se (diets II, III and IV, respectively) and CD plus 0.15, 0.30 or 0.45 mg/kg IOG Se (diets V, VI and VII, respectively).4. Feed intake (FI), body weight gain (BWG), immune variables and mRNA expression profile of hepatic selenoproteins (SepW, GSHPx1, TrxR and GSHPx3) genes were determined. The BWG, FI and feed conversion ratio did not differ among various dietary treatments.5. The lipid peroxidation and activity of RBC catalase were lower (P < 0.05) in groups fed diets supplemented OG Se compared to those fed IOG Se and CD. The activity of GSH Px was higher among the groups fed diet supplemented OG Se compared to those groups fed OG Se and CD. However, supplementing diets with OG or IOG Se did not affect humoral or cell mediated immune responses.6. The expression levels of SepW were higher (P < 0.01) among the groups supplemented with OG Se. Expression levels of GSH-Px1, TrxR and GSHPx3 were higher (P < 0.01) among the groups supplemented with OG Se compared to those groups fed IOG Se or CD.7. Supplementing OG Se improved the activities of anti-oxidant enzymes and hepatic expression of selenoproteins genes in the present study. However, supplementing OG or IOG Se did not affect growth performance and immune variables in broiler chickens.
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Antioxidantes , Galinhas , Masculino , Animais , Suplementos Nutricionais , Ingestão de AlimentosRESUMO
Pongamia pinnata (L.) Pierre (Pongamia) is a tree native to Southeast Asia. Recently, interest in Pongamia focused on its potential as a biofuel source as its seeds contain around 40% oil. However, Pongamia has multiple applications beyond biofuel production. It is a legume, can form symbiotic associations with mycorrhizal fungi, has been shown to be tolerant to drought, salinity, and heavy metals in soil, and has potential to mitigate climate change. Additionally, Pongamia oil has medicinal properties, can be used as biopesticide, insect repellent, to produce soap, and as a source of edible grade vegetable oil. The seed cake can be used as a source of bioenergy, food and feed protein, and organic fertiliser, and the flowers are a good source of pollen and nectar. Pongamia can also bring socio-economic benefits as its ability to restore degraded and contaminated land provides opportunities for local communities through novel valorisation pathways. These multiple applications have potential to form part of a circular bioeconomy in line with sustainable development goals. Although research on the multiple applications of Pongamia has grown considerably, knowledge gaps remain and these need to be addressed so that the full potential of Pongamia can be achieved. Further understanding of the mechanisms underlying its resilience to abiotic stresses, phytoremediation potential and biotic interactions should be a priority, and co-ordinated breeding efforts will be key. Here, we critically review the available literature on Pongamia and highlight gaps in knowledge in which future research should focus on to ensure that the full potential of this versatile tree can be achieved. We conclude that Pongamia can potentially form part of a circular bioeconomy and that harnessing the multiple applications of Pongamia in a holistic manner, with collaboration among key stakeholders, is crucial for the successful application of its benefits far beyond biofuel production.
Assuntos
Millettia , Pongamia , Millettia/metabolismo , Sequestro de Carbono , Biocombustíveis , Melhoramento Vegetal , Árvores/metabolismo , Fatores SocioeconômicosRESUMO
In this review from literature appearing over about the past 5 years, we focus on selected selenide reports and related chemistry; we aimed for a digestible, relevant, review intended to be usefully interconnected within the realm of fluorescence and selenium chemistry. Tellurium is mentioned where relevant. Topics include selenium in physics and surfaces, nanoscience, sensing and fluorescence, quantum dots and nanoparticles, Au and oxide nanoparticles quantum dot based, coatings and catalyst poisons, thin film, and aspects of solar energy conversion. Chemosensing is covered, whether small molecule or nanoparticle based, relating to metal ion analytes, H2S, as well as analyte sulfane (biothiols-including glutathione). We cover recent reports of probing and fluorescence when they deal with redox biology aspects. Selenium in therapeutics, medicinal chemistry and skeleton cores is covered. Selenium serves as a constituent for some small molecule sensors and probes. Typically, the selenium is part of the reactive, or active site of the probe; in other cases, it is featured as the analyte, either as a reduced or oxidized form of selenium. Free radicals and ROS are also mentioned; aggregation strategies are treated in some places. Also, the relationship between reduced selenium and oxidized selenium is developed.
Assuntos
Corantes Fluorescentes/química , Selênio/química , Animais , Fluorescência , Glutationa/química , Humanos , Nanopartículas/química , Pontos Quânticos/química , Telúrio/químicaRESUMO
BACKGROUND OF THE STUDY: Persons with mental illness (PwMI) are prone to weight gain as a side effect of antipsychotics. Health counselling on diet, physical activity, medication adherence, expressed emotions and technology use, by health professionals, can help in managing these side-effects. AIM: The aim of this study was to identify the pre-counselling profile of the subjects such as body mass index (BMI), diet, physical activity, medication adherence, expressed emotions and technology use among PwMI; to attend the Holistic Health Clinic as part of follow-up services in the psychiatry Outpatient Department (OPD) as well as to find correlation and association between the study variables. METHODS: The study involved a cross-sectional descriptive design based on convenience sampling. The sample consists of 56 patients who are receiving antipsychotics under symptom control (self-reported) and were overweight. Data were collected with a patient assessment proforma and analysed using SPSS-22. RESULTS: The patients referred to the holistic health counselling (HHC) had abnormal weight and BMI. The mean and SD of weight was 74.48 ± 14.07 and BMI 29.51 ± 5.15. All the participants received counselling on diet, 87.5% on physical activity, 62.5% on sleep hygiene, 55.4% on medication adherence, 8.9% on family emotional climate and only 5.4% on healthy use of technology. Weight has shown significant relation with gender (male = 80.84 ± 17.71, female = 71.09 ± 10.52, t = -2.52, p = .015) and near to significant relationship (χ2 = 7.685, p = .053) with educational status. CONCLUSION: Patients receiving second-generation antipsychotics (SGA) have lesser extra pyramidal side-effects; however, they are more prone to gain weight. Proper screening and counselling during the follow-up visit in the outpatient setting can help in identification, prevention and management of the obesity-related metabolic syndrome and cardiovascular disease (CVD), and motivate them to adopt healthy behaviours.
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Saúde Holística , Pacientes Ambulatoriais , Índice de Massa Corporal , Aconselhamento , Estudos Transversais , Feminino , Humanos , Masculino , Sobrepeso/epidemiologiaRESUMO
Improved-Samba-Mahsuri (ISM), a high-yielding, popular bacterial blight resistant (possessing Xa21, xa13, and xa5), fine-grain type, low glycemic index rice variety is highly sensitive to low soil phosphorus (P). We have deployed marker-assisted backcross breeding (MABB) approach for targeted transfer of Pup1, a major QTL associated with low soil P tolerance, using Swarna as a donor. A new co-dominant marker, K20-1-1, which is specific for Pup1 was designed and used for foreground selection along with functional markers specific for the bacterial blight resistance genes, Xa21, xa13, and xa5. A set of 66 polymorphic SSR marker were used for the background selection along with a pair of flanking markers for the recombination selection in backcross derived progenies and in BC2F2 generation, 12 plants, which are homozygous for Pup1, all the three bacterial blight resistance genes and possessing agro-morphological traits equivalent to or better than ISM were selected and selfed to produce BC2F3s. They were evaluated in plots with low soil P and normal soil P at ICAR-IIRR, Hyderabad for their low soil P tolerance, and bacterial blight resistance and superior lines were advanced to BC2F6. One of the lines, when tested at multiple locations in India was found promising under both normal as well as low soil P conditions.
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Adaptação Fisiológica , Bactérias/patogenicidade , Produtos Agrícolas/fisiologia , Marcadores Genéticos/genética , Oryza/fisiologia , Fósforo/farmacologia , Solo/química , Produtos Agrícolas/genética , Produtos Agrícolas/microbiologia , Genes de Plantas , Índia , Oryza/genética , Oryza/microbiologia , Locos de Características QuantitativasRESUMO
In this study, we developed tamarind gum (TG) and rice bran oil (RBO)-based emulgels. The control formulation (TR0), did not contain RBO. The emulgels were named as TR1, TR2, TR3, and TR4, which contained 5% (w/w), 10% (w/w), 15% (w/w), and 20% (w/w/) of RBO, respectively. The microscopic studies showed that the emulgels were biphasic in nature. FTIR spectroscopy revealed the reduction in the hydrogen bonding with an increase in the RBO content. Impedance profiles suggested that the resistive component of the emulgels was increased as the RBO content was increased. The thermal analysis suggested that the addition of RBO reduced the water holding capacity of the emulgels. Stress relaxation studies revealed that the fluidic component was considerably higher in TG/RBO-based emulgels as compared to TR0. In vitro release study of the model drug (ciprofloxacin HCl; a hydrochloride salt of ciprofloxacin) suggested a significantly lower release from the emulgel matrices (TR1-TR4) in comparison to TR0. However, ex vivo corneal permeation of the drug increased with an increase in the RBO content. Since the emulgels were able to improve the corneal permeation of the model drug, the emulgels can be explored to deliver drugs to the internal structures of the eye.
Assuntos
Antibacterianos/administração & dosagem , Antibacterianos/química , Óleos de Plantas/química , Óleo de Farelo de Arroz/química , Tamarindus/química , Ciprofloxacina/administração & dosagem , Ciprofloxacina/química , Olho/efeitos dos fármacos , Ligação de HidrogênioRESUMO
Seagrass ecosystems are vital for its regulatory services yet, highly threatened by degradation due to human pressures. Decomposition of two tropical seagrass species (Cymodocea serrulata and Cymodocea rotundata) was studied and compared, to understand their potential in generating additional nutrients to coastal waters. Release of carbon, nitrogen and phosphorus during the decomposition process of seagrass wracks was estimated in bacteria-active (non-poisoned) and bacteria-inhibited (poisoned) conditions from shore-washed fresh seagrass, sampled from Palk Bay, India. Incubation experiments for 25 days indicated a near three times higher concentration of dissolved organic carbon (DOC) in bacteria-inhibited flasks compared to bacteria-active conditions for both species. The maximum leaching rates of DOC, TDN and TDP were found to be 294, 65.1 and 11.2 µM/g dry wt/day, respectively. Further, higher release of dissolved inorganic nitrogen (DIN) (> 1.3 times) was documented from the bacteria-active flask, highlighting the significance of microbial process in generating bio-available nutrients from decaying seagrass. Faster decomposition (0.014 ± 0.004 day-1) in the initial stages (up to 8 days) compared to the later stages (0.005 ± 0.001 day-1) indicated a rapid loss of biomass carbon during the initial leaching process and its relative importance in the decomposition pathway. The decomposition rate is best described by a single-stage exponential decay model with a half-life of 41 days. It is estimated that the total seagrass litter available along the Palk Bay coast is about ~ 0.3 Gg with high potential of additional nitrogen (0.9 ± 0.5 Mg) and phosphorus (0.3 ± 0.1 Mg) supply to the adjacent coastal waters.
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Alismatales/metabolismo , Bactérias/metabolismo , Monitoramento Ambiental/métodos , Nutrientes/análise , Biomassa , Carbono/metabolismo , Ecossistema , Humanos , Índia , Nitrogênio/análise , Fósforo/metabolismoRESUMO
Organic acids play an important role in metal uptake and trafficking in plants. Therefore, the role of exogenous citrate and malate on Cd tolerance was studied in the seedlings of Oryza sativa L. cv MTU 7029. Seedlings were exposed to Cd plus organic acids in hydroponics and monitored changes in Cd accumulation, expression of metal transporters, chlorophyll fluorescence, and antioxidants. It found that organic acid supplements decrease Cd accumulation in leaf because of up-regulation of tonoplast localized heavy metal ATPase (OsHMA3) which allows vacuolar sequestration of Cd in the root. Malic acid helped Cd exclusion in the root too. A shift in Cd speciation from sulphhydryl to the carboxylic group also noticed in the roots of plants exposed to organic acids. Treatment of organic acids was effective to prevent Cd inducible Fe deficiency via up-regulation of the iron-regulated transporter (OsIRT1), increase in ferric chelate reductase activity, and formation of Cd stabilized Fe3+ - organic acid complex respectively. Also, exposure to organic acids increased the accumulation of antioxidants such as anthocyanin and glutathione (GSH) under Cd stress. Above changes assisted in upholding of photosynthetic electron transport and biomass productivity during the course of Cd treatment with organic acid supplements.
Assuntos
Cádmio/metabolismo , Ácido Cítrico/farmacologia , Ferro/metabolismo , Malatos/farmacologia , Oryza/efeitos dos fármacos , Oryza/metabolismo , Antioxidantes/metabolismo , Transporte Biológico , Biomassa , Cádmio/toxicidade , Proteínas de Transporte de Cátions/metabolismo , FMN Redutase/metabolismo , Oryza/crescimento & desenvolvimento , Oxirredução , Estresse Oxidativo , Fotossíntese , Plântula/efeitos dos fármacos , Plântula/metabolismoRESUMO
BACKGROUND: The assessment of the nutritional composition and phytochemical screening of banana pseudostem (PB) and flower (FB) advocate this nonconventional food source for routine consumption, considering its various health benefits. OBJECTIVES: The aim is to assess the proximate nutrient composition, fatty acids, minerals, amino acid profile, and global antioxidant response (GAR) of PB and FB. METHODS: Standard analytical procedures were used to determine the nutritional quality and GAR of PB and FB. RESULTS: The chemical analysis illustrated that functional profile (water holding capacity, oil holding capacity, swelling power, and solubility), and proximate (ash, moisture, protein, fat, dietary fiber, and carbohydrate) contents were substantially high in FB than PB. With a well-proportionate amino acid profile, PB (0.56) and FB (0.54) comprised of a high ratio of essential to nonessential amino acids than those of FAO/WHO requirement (0.38). The mineral analysis revealed that PB and FB were rich in macro and micro minerals in the order K > Ca > Mg > P > Na and K > Mg > Na > Ca > P, respectively. Linoleic acid was found to be the major component in PB and FB. Besides, total antioxidant activity conducted for PB and FB by GAR method, measuring both bio-accessible and insoluble fractions, revealed that the soluble fraction fared better than the chemical extracts. CONCLUSION: The results revealed high nutritional qualities of the byproducts of banana and the low cost of its production promotes their use as a prospective nonconventional food resource with high nutraceutical value. SUMMARY: AOAC: Association of Analytical CommunitiesFAO/WHO: Food and Agriculture Organization of the United Nations/World health organization Abbreviations Used: Banana flower was more potent than banana pseudostem in terms of its nutritional quality and total antioxidant capacity affirming their usefulness (of both the secondary products) in the pharmaceutical sector as a nutritional supplement due to the health-related properties of dietary fibre and associated bioactive compounds.
RESUMO
UNLABELLED: Andrographis paniculata Nees is an important medicinal plant found in the tropical regions of the world, which has been traditionally used in Indian and Chinese medicinal systems. It is also used as medicinal food. A. paniculata is found to exhibit anti-inflammatory activities; however, its inhibitory potential on inflammatory Group IIA phospholipases A2 (PLA2) and its associated inflammatory reactions are not clearly understood. The aim of the present study is to evaluate the inhibitory/neutralizing potential of ethanolic extract of A. paniculata on the isolated inflammatory PLA2 (VRV-PL-VIIIa) from Daboii rusellii pulchella (belonging to Group IIA inflammatory secretory PLA2 [sPLA2]) and its associated edema-induced activities in Swiss albino mice. A. paniculata extract dose dependently inhibited the Group IIA sPLA2 enzymatic activity with an IC50 value of 10.3 ± 0.5 µg/ml. Further, the extract dose dependently inhibited the edema formation, when co-injected with enzyme indicating that a strong correlation exists between lipolytic and pro-inflammatory activities of the enzyme. In conclusion, results of this study shows that the ethanolic extract of A. paniculata effectively inhibits Group IIA sPLA2 and its associated inflammatory activities, which substantiate its anti-inflammatory properties. The results of the present study warranted further studies to develop bioactive compound (s) in ethanolic extract of A. paniculata as potent therapeutic agent (s) for inflammatory diseases. SUMMARY: This study emphasis the anti-inflammatory effect of A. paniculata by inhibiting the inflammatory Group IIA sPLA2 and its associated inflammatory activities such as edema. It was found that there is a strong correlation between lipolytic activity and pro-inflammatory activity inhibition. Therefore, the study suggests that the extract processes potent anti-inflammatory agents, which could be developed as a potential therapeutic agent against inflammatory and related diseases.
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Cadmium (Cd)-contaminated rice is a serious health concern. In the present study, Cd accumulation and stress responses in Oryza sativa L. cv MTU 7029 seedlings were characterized under varying concentrations of plant nutrients in Hoagland media. It has been found that nutrient supplement modulates Cd accumulation and related stress tolerance while efficacy of each nutrient varies. Supplementation of Fe, Mn, N, Ca, and S were found to reduce Cd accumulation in leaf whereas Mn and Fe supply effect was also observed in roots. Analysis of maximum quantum efficiency of photosynthesis indicated that Fe and S supplements confer highest Cd stress tolerance. The present study highlighted the potential of plant nutrients for minimizing Cd accumulation and its toxicity in rice seedlings.
Assuntos
Cádmio/metabolismo , Minerais/metabolismo , Oryza/metabolismo , Plântula/crescimento & desenvolvimento , Cádmio/análise , Oryza/química , Oryza/crescimento & desenvolvimento , Fotossíntese , Folhas de Planta/química , Folhas de Planta/crescimento & desenvolvimento , Folhas de Planta/metabolismo , Raízes de Plantas/química , Raízes de Plantas/crescimento & desenvolvimento , Raízes de Plantas/metabolismo , Plântula/química , Plântula/metabolismoRESUMO
MAIN CONCLUSION: Cadmium toxicity is alleviated by iron and manganese supplements because of reduction in cadmium accumulation and upholding of redox regulation that prevent cadmium-inducible damage to root growth and photosynthesis. Cadmium toxicity in Oryza sativa L. MTU 7029 was investigated in the presence of different concentrations of the micronutrients Fe and Mn. It had been observed that these micronutrients reduce Cd uptake and minimize Cd-inducible rhizotoxicity. The photosynthetic electron transport chain, which is the hub of Fe containing metalloproteins, was severely affected by Cd and resulted in reduced bioproductivity under Cd stress. However, exogenous Fe restored the photosynthetic electron transport. Thus, due to the maintenance of the photosynthetic electron transport, the Cd tolerance was improved during Fe supplement. Both antioxidant enzymes and non-enzymatic antioxidant metabolites were found to play important roles in the alleviation of Cd stress under Fe or Mn supplement. It is concluded that the presence of excess Fe and Mn protects rice plants from Cd stress.
Assuntos
Adaptação Fisiológica/efeitos dos fármacos , Cádmio/toxicidade , Ferro/farmacologia , Manganês/farmacologia , Oryza/fisiologia , Fotossíntese/efeitos dos fármacos , Raízes de Plantas/fisiologia , Antioxidantes/metabolismo , Biomassa , Carboidratos/análise , Clorofila/metabolismo , Fluorescência , Glutationa/metabolismo , Malondialdeído/metabolismo , Oryza/anatomia & histologia , Oryza/efeitos dos fármacos , Oryza/enzimologia , Oxirredução/efeitos dos fármacos , Proteínas de Plantas/metabolismo , Raízes de Plantas/efeitos dos fármacos , Tilacoides/metabolismoRESUMO
Iron-dependent Cd tolerance in Oryza sativa L. cv 7029 had been explored. Photo assimilatory process such as photosynthesis and nitrogen fixation found to be functional in the presence of excess Fe during Cd stress. Cd-inducible Fe deficiency demonstrated with upregulation of iron uptake gene families such as OsIRT and OsYSL was attributed as foremost reason for retardation of photo assimilation in the course of Cd treatment. Upholding of photo assimilation during Fe supplement was associated with proteome modulations. Monitoring of proteome responses in leaf and root revealed proteins imperative for alleviation of Cd stress. Specifically, proteins that take part in photosynthesis, glucose metabolism, nitrogen fixation, and abiotic stress tolerance played key role in Fe-dependent Cd detoxification. It is concluded that Fe supply help to operate photo assimilation which enable favorable proteome responses of Cd stress tolerance.
Assuntos
Cádmio/toxicidade , Oryza/metabolismo , Proteínas de Plantas/metabolismo , Proteoma/metabolismo , Adaptação Fisiológica , Cádmio/metabolismo , Ferro/metabolismo , Nitrogênio/metabolismo , Oryza/anatomia & histologia , Oryza/efeitos dos fármacos , Raízes de Plantas/anatomia & histologia , Raízes de Plantas/efeitos dos fármacos , Raízes de Plantas/metabolismoRESUMO
BACKGROUND: Postprandial hyperglycaemia in diabetes could be ameliorated by inhibiting intestinal α-glucosidases, responsible for starch hydrolysis and its absorption. Different parts of banana have been in use in conventional medicinal formulations since ancient times. Its role as an antihyperglycaemic agent has also been studied. This study was aimed at explaining the mechanism of hypoglycaemic effect by ethanol extract of banana pseudostem (EE). Additionally, studies on the active components involved in the effect have also been attempted. RESULTS: EE significantly inhibited mammalian intestinal α-glucosidases and yeast α-glucosidase (IC50 , 8.11 ± 0.10 µg mL(-1) ). The kinetic studies showed that EE inhibited sucrase, maltase and and p-nitrophenyl-α-d-glucopyranoside hydrolysis by mixed-type inhibition. Further, in vivo studies identified that the oral administration (100-200 mg kg(-1) body weight) of EE significantly suppressed the maltose/glucose-induced postprandial plasma glucose elevation and wielded an antihyperglycaemic effect in normal and alloxan-induced diabetic rats. GC-MS analysis of EE revealed high levels of ß-sitosterol (29.62%), stigmasterol (21.91%), campesterol (10.85%) and other compounds. CONCLUSION: These findings suggest that EE might exert an anti-diabetic effect by inhibition of α-glucosidases from the intestine, in turn suppressing the carbohydrate absorption into the bloodstream. Hence the results extend a foundation to the future prospects of the food-derived enzyme inhibitors in treatment of diabetes.
Assuntos
Diabetes Mellitus Experimental/tratamento farmacológico , Frutas/química , Hipoglicemiantes/administração & dosagem , Musa/química , Extratos Vegetais/administração & dosagem , Animais , Etanol , Feminino , Cromatografia Gasosa-Espectrometria de Massas , Inibidores de Glicosídeo Hidrolases/administração & dosagem , Cinética , Masculino , Maltose/administração & dosagem , Compostos Fitoquímicos/análise , Fitoterapia , Extratos Vegetais/química , Ratos , Ratos Wistar , alfa-GlucosidasesRESUMO
We examined the uptake of five heavy metals (Cu, Fe, Ni, Zn, and Mn) in Ceratophyllum demersum L. (hornwort) and Potamogeton alpinus Balb. (pondweed) from Iset' river, Ural region, Russia. This study was conducted in a territory that is highly urbanized where the surface waters are contaminated by a wide spectrum of pollutants. The environmental situation in this territory drastically deteriorated due to anthropogenic activity. The water quality in most of the water bodies in the Ural region is rather poor. In a comparative study of C. demersum and P. alpinus, differential accumulation pattern was noted for heavy metals (HMs). Higher amounts of HMs accumulated in C. demersum compared to P. alpinus. Also it was shown that in leaves of C. demersum there were high amount of total phosphorus, nitrogen, organics acids and ash; high activity of guaiacol peroxidase; high content of nonenzymatic antioxidants viz., flavonoids, ascorbate, glutathione and proline; high amount of thiols (soluble and membrane bound) compared to P. alpinus.
Assuntos
Anthocerotophyta/fisiologia , Metais Pesados/metabolismo , Potamogetonaceae/fisiologia , Poluentes Químicos da Água/metabolismo , Adaptação Fisiológica , Antioxidantes/análise , Antioxidantes/metabolismo , Biodegradação Ambiental , Ácidos Carboxílicos/análise , Ácidos Carboxílicos/metabolismo , Monitoramento Ambiental , Sedimentos Geológicos , Metais Pesados/análise , Nitrogênio/análise , Nitrogênio/metabolismo , Fósforo/análise , Fósforo/metabolismo , Folhas de Planta , Rios , Federação Russa , Poluentes Químicos da Água/análise , Qualidade da ÁguaRESUMO
Cadmium (Cd) stress responses in seedlings of two Indian rice cultivars, MTU 7029 and MO 16 were investigated under ammonium-based fertilizer amendment. Cd translocation was reduced by fertilizer treatment. An increase in the production of organic acids as well as nitrogenous compounds and maintenance of nutrient status were implicated for decrease in Cd translocation which in turn promoted shoot growth. Fertilizer treatment increased photosynthetic pigments and activity of antioxidant enzymes that ensured steady photosynthetic rate during Cd stress. MO 16 showed Cd exclusion characteristics when compared with MTU 7029. Photosynthesis performance of MO 16 was not affected by Cd treatments. These findings suggest that photosynthesis influenced decrease in Cd translocation enhanced shoot growth of seedlings during ammonium phosphate-sulfur fertilizer supplementation.
Assuntos
Cádmio/metabolismo , Fertilizantes , Oryza/fisiologia , Fotossíntese/fisiologia , Poluentes do Solo/metabolismo , Compostos de Amônio , Cádmio/análise , Oryza/crescimento & desenvolvimento , Fosfatos , Raízes de Plantas/crescimento & desenvolvimento , Raízes de Plantas/fisiologia , Plântula/metabolismo , Plântula/fisiologia , Poluentes do Solo/análise , EnxofreRESUMO
BACKGROUND: Infection or colonization with multidrug-resistant organisms (MDRO) is associated with high mortality and morbidity. Knowledge of MDRO colonization may help in planning empirical antibiotic approach in neutropenic patients, which is known to improve patient outcomes. While routine cultures are positive and may help direct antibiotic therapy in only up to 15% neutropenic patients, surveillance cultures are positive in more than 90% of cancer patients. AIMS: To assess the rate of MDRO carrier status at presentation and rate of conversion to MDRO during the treatment. MATERIALS AND METHODS: Rectal swabs of all the outpatients presenting to pediatric oncology unit were sent within 7 days from date of registration from January 2014 to December 2014. Furthermore, stool cultures/rectal swabs of all patients who got directly admitted to the pediatric ward at presentation were sent within 24 h. Repeat rectal swabs were sent again for patients from this cohort when they got readmitted to the ward at least 15 days after last discharge or when clinically indicated. RESULTS: Baseline surveillance rectal swabs were sent for 618 patients, which included 528 children with hematological malignancies and 90 children with solid tumors. Forty-five (7.3%) showed no growth. Of the remaining 573, 197 (34.4%) patients were colonized by two organisms and 30 (5.2%) by three organisms. Three hundred and thirty-four (58.4%) showed extended spectrum beta-lactamase (ESBL) Enterobacteriaceae, of which 165 (49.5%) were ESBL sensitive to beta-lactam with beta-lactamase inhibitors combinations and 169 (50.5%) were resistant to combinations. One hundred and sixteen (20.2%) were carbapenem-resistant Enterobacteriaceae (CRE) and 65 (11.4%) had vancomycin-resistant enterococci in baseline cultures. Only 63 (21%) patients were colonized by a sensitive organism in their baseline surveillance cultures. Morbidity (Intensive Care Unit stay) and mortality was higher in patients colonized by MDR organisms. There was a significant correlation between the place of residence and CRE colonization status with the highest rate (60%) of CRE colonization observed in children from East India. The repeat cultures showed the further conversion of sensitive isolates to MDRO in 80% of these children, of which 40% each converted from non-ESBL and non-CRE to ESBL and CRE, respectively. CONCLUSION: This is the first study illustrating the alarming high prevalence of community-acquired MDRO colonization, especially CRE, which has grave implications for therapy for children with cancer potentially compromising delivery of aggressive chemotherapy and affecting outcomes. This incidence further increases during the course of treatment. Knowing the baseline colonization also guides us for the planning of chemotherapy as well as antibiotic approach and infection control strategies. Local antibiotics stewardship including education of the healthcare workers as well as national level interventions to prevent antibiotic misuse in the community is critical to minimize this problem.
Assuntos
Antibacterianos/farmacologia , Carbapenêmicos/farmacologia , Portador Sadio/microbiologia , Infecções Comunitárias Adquiridas/microbiologia , Neoplasias/microbiologia , Portador Sadio/epidemiologia , Cefalosporinas/farmacologia , Criança , Infecções Comunitárias Adquiridas/epidemiologia , Farmacorresistência Bacteriana Múltipla , Fezes/microbiologia , Humanos , Índia/epidemiologia , Testes de Sensibilidade Microbiana , Neoplasias/complicações , Neoplasias/terapia , Prevalência , Estudos Prospectivos , Reto/microbiologia , Enterococos Resistentes à Vancomicina/isolamento & purificação , Resistência beta-Lactâmica , Inibidores de beta-Lactamases/farmacologiaRESUMO
AIM: To explore the association between maternal dietary fat and fatty acid (FA) intake during lactation, and the risk of asthma in the offspring by the age of 5 years. METHODS: The subjects comprised 1798 mother-child pairs from the Type 1 Diabetes Prediction and Prevention (DIPP) Nutrition Study. Dietary intake was assessed by a validated 181-item food frequency questionnaire, which covered the third month of lactation. The cumulative incidence of asthma was assessed at the age of 5 years with a questionnaire modified from the International Study of Asthma and Allergies in Childhood (ISAAC). Cox proportional hazards regression was used for statistical analysis. RESULTS: The maternal use of margarines during lactation was associated with a marginally increased risk of asthma [hazard ratio (HR) for user vs. nonuser 1.96, 95% confidence interval (CI) 1.01-3.82, p = 0.047] after adjusting for putative confounders. The maternal intakes of n-3 polyunsaturated FA (PUFA) and fish during lactation were not associated with the risk of asthma. CONCLUSION: Maternal use of margarines during lactation was weakly associated with an increased risk of asthma in the offspring at the age of 5 years. Other fats or FAs during lactation were not associated with the risk of asthma. However, the nonadherence to dietary recommendations regarding especially fats of our study population may restrict the generalizability of our results.
Assuntos
Asma/etiologia , Aleitamento Materno , Dieta/efeitos adversos , Gorduras na Dieta/efeitos adversos , Lactação , Fenômenos Fisiológicos da Nutrição Materna , Adulto , Pré-Escolar , Estudos de Coortes , Inquéritos sobre Dietas , Ácidos Graxos Ômega-3 , Feminino , Humanos , Margarina/efeitos adversos , Modelos de Riscos Proporcionais , Estudos Prospectivos , Fatores de RiscoRESUMO
Several species of plants have developed a tolerance to metal that enables them to survive in metal contaminated and polluted sites. Some of these aquatic plants have been reported to accumulate significant amounts of specific trace elements and are, therefore, useful for phytofiltration. This work focuses the potential of aquatic plants for the phytofiltration of uranium (U) from contaminated water. We observed that Callitriche stagnalis, Lemna minor, and Fontinalis antipyretica, which grow in the uraniferous geochemical province of Central Portugal, have been able to accumulate significant amounts of U. The highest concentration of U was found in Callitriche stagnalis (1948.41 mg/kg DW), Fontinalis antipyretica (234.79 mg/kg DW), and Lemna minor (52.98 mg/kg DW). These results indicate their potential for the phytofiltration of U through constructed treatment wetlands or by introducing these plants into natural water bodies in the uraniferous province of Central Portugal.