Influence of Organic Matter Vis-à-Vis Humic Acid on the Transformation of Inorganic and Organic Forms of Nitrogen in a Typic Haplustept Soil     

N. Surbala Devi  D. Saha 《Communications in Soil Science and Plant Analysis》2017,48(9):1042-1051

A laboratory experiment was conducted to study the changes in inorganic and organic forms of nitrogen (N) in a Typic Haplustept soil treated with mustard cake vis-à-vis humic acid in the presence and absence of inorganic N. Results revealed that irrespective of treatments, significantly higher amount of soluble nitrate (NO₃^-), hydrolysable ammonium (NH₄⁺), non-hydrolysable and total N were accumulated in the soil treated with mustard cake in the presence of inorganic N. However, on the other hand, a humic acid-treated system showed significantly higher content of exchangeable NH₄⁺ and hexosamine N. Application of humic acid alone leads to the accumulation of a significantly higher amount of total hydrolysable and unidentified N in the soil. Among the different treatments, NH₄⁺ fixation was more in mustard cake followed by humic acid-treated soil. Humic acid is more susceptible to mineralization than mustard cake, particularly with respect to total N accumulation in soils.  相似文献   

Maiden hair ferns (<Emphasis Type="Italic">Adiantum</Emphasis> L., Pteridaceae–Vittarioideae) of North East India: diversity,phytochemistry and utilization     

Sanatombi Devi Yumkham  Meena Elangbam  Rita Nongmaithem  Premita Devi Naorem  Potsangbam Kumar Singh 《Genetic Resources and Crop Evolution》2018,65(4):1269-1280

The genus Adiantum L. (Pteridaceae–Vittarioideae) are medicinal ferns with around 200 species and distributed in temperate and tropical regions. Several species of the genus are used in traditional medicine in different parts of the world including the Chinese Herbal Medicine, United States Pharmacopoeia and Ayurveda System of Medicine and Homeopathy. In the present paper, an updated and comprehensive data on species diversity of Adiantum found in the seven (7) states of North East India will be discussed. Altogether, nine (9) species are recorded and this includes A. capillus–veneris L. with two (2) races, A. caudatum L., A. edgeworthii Hook., A. flabellulatum L., A. hispidulum Sw., A. incisum Forssk., A. peruvianum Klotzsch, A. philippense L. with three (3) subspecies and A. raddianum C. Presl. Brief morphological parameters, utilization including medicinal, economical and traditional aspects, along with their bioactive components are described. The paper also aims to provide for the first time an updated compilation of species information including correct nomenclature, synonyms, distribution and propagation.  相似文献   

Seasonal field efficacy of pyriproxyfen autodissemination stations against container‐inhabiting mosquito Aedes albopictus under different habitat conditions          下载免费PDF全文

Devi Shankar Suman  Yi Wang  Gregory M Williams  Eric Williges  Randy Gaugler 《Pest management science》2018,74(4):885-895

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Evaluation of five different antigens in enzyme-linked immunosorbent assay for the detection of avian pneumovirus antibodies.     

Sunil Maherchandani  Devi P Patnayak  Claudia A Mu?oz-Zanzi  Dale Lauer  Sagar M Goyal 《Journal of veterinary diagnostic investigation》2005,17(1):16-22

Five different antigens were evaluated in enzyme-linked immunosorbent assay (ELISA) tests for the detection of avian pneumovirus (APV) antibodies. Two of the 5 antigens were prepared from recent APV isolates from Minnesota. The 2 older isolates were passage 63 of a strain currently used as a live, attenuated vaccine and a Colorado strain isolated for the first time in the United States and currently used in an ELISA test. The fifth antigen is based on an APV recombinant N-protein. Basic parameters and positive-negative threshold of the assays were established for all 5 antigens on the basis of data obtained by testing 46 known negative and 46 known positive serum samples. Subsequently, 449 field samples were tested by all 5 ELISAs. The optical density difference (ODD) was calculated by subtracting optical density of the sample in the negative antigen well from that in the positive antigen well. In the current ELISA test based on the Colorado strain, an ODD of 0.2 is considered to be the cutoff value to classify samples as negative or positive. In this study, however, use of different cutoffs, based on ODD of negative control plus 3 SD or values estimated from Receiver operating characteristic analysis, was considered to be more appropriate for the various antigens used. Overall person-to-person and day-to-day variability was found to be large for all tests using either ODD or sample to positive ratio to report results. In addition, results suggest that antigenicity of the APV isolates in the United States has not changed between 1997 and 2000.  相似文献   

Toxicity and metabolism of endosulfan and its effect on oxygen consumption and total nitrogen excretion of the fish Macrognathus aculeatum     

D.M.R. Rao  A.P. Devi  A.S. Murty 《Pesticide biochemistry and physiology》1981,15(3):282-287

Experiments were conducted with the freshwater fish Macrognathus aculeatum to study the toxicity and metabolism of endosulfan and the effect of the pesticide on the oxygen consumption and total nitrogen excretion. The 96-hr LC₅₀ value was 3.5 ± 0.2 ppb. In brain, gills, gut, liver, and kidney, endosulfan was metabolized to endosulfan sulfate, but this appears to be only an intermediary step as the nontoxic endosulfan ether was found only in the liver and kidney, the principal organs of elimination of toxicants in fish. The pesticide, both at sublethal and lethal concentrations, decreased oxygen consumption and total nitrogen excretion.  相似文献   

Anti-inflammatory,analgesic and antipyretic properties of Clitoria ternatea root   总被引：1，自引：0，他引：1  

Devi BP  Boominathan R  Mandal SC 《Fitoterapia》2003,74(4):345-349

Clitoria ternatea roots methanol extract when given by oral route to rats was found to inhibit both the rat paw oedema caused by carrageenin and vascular permeability induced by acetic acid in rats. Moreover, the extract exhibited a significant inhibition in yeast-induced pyrexia in rats. In the acetic acid-induced writhing response, the extract markedly reduced the number of writhings at doses of 200 and 400 mg/kg (p.o.) in mice.  相似文献   

Pharmacokinetics of enrofloxacin following oral and subcutaneous administration in the common ringtail possum (Pseudocheirus peregrinus)          下载免费PDF全文

T. F. Scheelings  J. L. Devi  A. P. Woodward  T. Whittem 《Journal of veterinary pharmacology and therapeutics》2015,38(5):482-487

[Correction added on 23 March 2015, after first online publication: Terminal half‐life values of enrofloxacin is corrected in the fourth sentence of the abstract] Clinically healthy common ringtail possums (n = 5) received single doses of 10 mg/kg enrofloxacin orally and then 2 weeks later subcutaneously. Serial plasma samples were collected over 24 h for each treatment phase, and enrofloxacin concentrations were determined using a validated HPLC assay. Pharmacokinetic parameters were determined by noncompartmental analysis. Following oral administration, plasma concentrations were of therapeutic relevance (C_max median 5.45 μg/mL, range 2.98–6.9 μg/mL), with terminal‐phase half‐life (t_½) shorter than in other species (median 3.09 h, range 1.79–5.30 h). In contrast, subcutaneous administration of enrofloxacin did not achieve effective plasma concentrations, with plasma concentrations too erratic to fit the noncompartmental model except in one animal. On the basis of the AUC:MIC, enrofloxacin administered at 10 mg/kg orally, but not subcutaneously, is likely to be effective against a range of bacterial species that have been reported in common ringtail possums.  相似文献   

Clays as dietary supplements for swine: A review     

Mohana Devi Subramaniam  In Ho Kim 《畜牧与生物技术杂志(英文版)》2015,6(1)

Clays are crystalline, hydrated aluminosilicate molecules composed of alkali and alkaline earth cations along with small amounts of various other elements. The best-known are montmorillonite, smectite, illite, kaolinite, biotite and clinoptilolite. The molecules in these clays are arranged in three-dimensional structures creating internal voids and channels capable of trapping a wide variety of molecules. As a result of this structure, clay minerals are regarded as a simple and effective tool for the prevention of the negative effects of many toxic compounds. Dietary supplementation with clays has been shown to improve weight gain and feed conversion in pigs. Where improvements in performance have been noted, one of the most likely explanations for the improvement is the fact clays increase nutrient digestibility. Clays reduce the speed of passage of feed along the digestive tract which allows more time for digestion. Feeding clays also causes morphological changes in the intestinal mucosa such as an increase in villus height and an increase in the villus height to crypt depth ratio. These changes increase the surface area of the gastrointestinal tract thus increasing nutrient digestibility. Several studies have indicated that feeding clay reduces the incidence, severity and duration of diarrhea in pigs. The mechanism for the reduction in diarrhea is likely due to increases in the numbers of Bifidobacteria and Lactobacillus and decreases in Clostridia and E. coli in the small intestine of pigs fed clays. In addition, the numbers of pigs born alive and weaned, birth weight and weaning weight have been shown to be higher for sows fed clays. Several studies have indicated that clays can help mitigate the effects of mycotoxins. The aim of the present review is to focus on the various clays which have been given attention in recent research and to discuss their potential to improve pig performance.  相似文献   

Heterodissemination: precision targeting container Aedes mosquitoes with a cohabiting midge species carrying insect growth regulator     

Yi Wang  Devi S Suman  Kshitij Chandel  Gregory M Williams  Isik Unlu  Randy Gaugler 《Pest management science》2020,76(6):2105-2112

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ENHANCEMENT OF PEA PRODUCTION USING LEAF EXTRACT OF WITHANIA SOMNIFERA L. UNDER SUB-TROPICAL FIELD CONDITIONS OF KULLU,NORTHWESTERN HIMALAYA,INDIA     

Rajesh Kumar Sharma  Pankaj Sharma  Sucheta Devi  Sher Singh Samant 《Journal of plant nutrition》2013,36(11):1754-1764

The present study investigates the promoting effects of leaf extract of Withania somnifera L plant on growth, biomass, and yield of Pisum sativum L plants. The growth and biomass of pea plants increased significantly over control due to leaf extract (LE-WS) treatment. Pea plants treated with LE-WS and ascorbic acid (L-AA) showed higher number as well as total dry weight of nodules over the control. The economic yield of pea plants due to LE-WS and L-AA treatments increased by 84 and 114%, respectively over control. The economic yield was significantly correlated with number of nodules (R² = 0.75, P <0.001). The study suggests that LE-WS may be used to promote the growth and increase the production of pea plants in areas having multiple stresses. Detailed study on the use of extracts of medicinal plants as a tool to reduce the adverse effects of single stress is further required.  相似文献