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Seung Hyun Han Seongjun Kim Hanna Chang Hyun-Jun Kim Asia Khamzina Yowhan Son 《Journal of Plant Ecology》2019,12(5):871
Aims
Assessment of factors regulating root decomposition is needed to understand carbon and nutrient cycling in forest ecosystems. The objective of this study is to examine the effects of soil depth and root diameter on root decomposition and to analyze the relationship of root decomposition with factors such as soil environmental conditions and initial litter quality. 相似文献
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Asia J. Murphy Zach J. Farris Sarah Karpanty Felix Ratelolahy Marcella J. Kelly 《International journal of primatology》2016,37(3):371-389
Primate populations, including Madagascar’s lemurs, are threatened worldwide and conservationists need accurate population estimates to develop targeted conservation plans. We sought to fill knowledge gaps for three lemur taxa —white-fronted brown lemur (Eulemur albifrons); eastern woolly lemur (Avahi laniger); and Allocebus/Microcebus, a category combining observations of hairy-eared dwarf lemurs (Allocebus trichotis) and mouse lemurs (Microcebus spp.)— in northeastern Madagascar by estimating their density, examining how their encounter rates and densities vary across three different forest types, and monitoring trends in encounter rates and densities at resurveyed sites, using data from surveys at six forest sites over a 4-year period (2010–2013). Landscape density for white-fronted brown lemur, eastern woolly lemur, and Allocebus/Microcebus was 21.5 (SE 3.67), 57.7 (SE 9.17), and 39.1 (SE 9.55) individuals/km2, respectively. There was no difference in density estimates at intact and intermediately degraded forest sites; however, we encountered white-fronted brown lemurs more often in intact forest (1.64 ± SE 0.40 individuals/km) than in intermediately degraded and degraded forest (0.15 ± SE 0.06 and 0.16 ± SE 0.06 individuals/km). In addition, we encountered white-fronted brown lemurs at lower rates in 2013 (0.15 ± SE 0.06 individuals/km) compared to 2010 (0.82 ± SE 0.12 individuals/km) at a resurveyed site. Our findings emphasize that primate researchers must account for variation in how lemur encounter rates and densities differ between intact and degraded forests, and although we observed a decline in white-fronted brown lemur encounter rate at our resurveyed site, we caution that changes in lemur encounter rates may simply reflect lower detection rates rather than lower density. Future research should focus on using conventional distance sampling techniques, which are infrequently used in primate studies, to provide more robust density estimates as a way to accurately assess trends and the effects of anthropogenic pressures on lemur populations. 相似文献
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Asia Nosheen Humaira Yasmin Rabia Naz Rumana Keyani Saqib Mumtaz Syed Babar Hussain Muhammad Nadeem Hassan Othman M. Alzahrani Ahmed Noureldeen Hadeer Darwish 《Saudi Journal of Biological Sciences》2022,29(1):43-52
Biodiesel is considered as a potential alternative energy source, but problem exists with the quantity and quality of feedstock used for it. To improve the feedstock quality of biodiesel, a field experiment was conducted under natural conditions. Cultivar Thori of kasumbha was used in the experiment. Commercialized biofertilizers were applied at the rate of 20 kg per acre and chemical fertilizer (diammonium phosphate) was applied as half dose (15 kg/ha). Results indicated that number of leaf plant−1, leaf area, number of seeds capitulum−1 was significantly increased by biofertilizer treatment alone (BF) and combine treatment of biofertilizer and chemical fertilizer (BFCF). Agronomic traits such as plant height, no. of branches of a plant, no. of capitulum/plant was improved significantly by BF treatment over the control. Maximum 1000 seed weight (41%) and seed yield (23%) were recorded in half dose of chemical fertilizers treatment (CFH). Seed oil content and seed phenolics were significantly improved by BF and CF treatments while maximum biodiesel yield was recorded by BF treatment. Maximum oleic acid was recorded by BF treatment while other fatty acids being maximum in control except linoleic acid in BFCF treatment. Results for specific gravity were non-significant while acid value and free fatty acid contents were substantially reduced by BF treatment as compared to other treatments. Maximum value of iodine number was recorded in BFCF treatment while tocopherol contents were improved by BF treatment. It is inferred that biofertilizer treatment alone perform better as compared to other treatments and 50% chemical fertilizer can be replaced using biofertilizer which is a good approach for sustainable environmental-friendly agriculture.Keyword: Green energy, Biofuel, Biodiesel, Kasumbha, Biofertilizers, Fatty acid, NMR 相似文献
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Wajid Bilal Anwar Faria Wajid Imran Nisar Haseeb Meraj Sharoze Zafar Ali Al-Shawaqfeh Mustafa Kamal Ekti Ali Riza Khatoon Asia Suchodolski Jan S. 《Functional & integrative genomics》2022,22(1):3-26
Functional & Integrative Genomics - This humble effort highlights the intricate details of metagenomics in a simple, poetic, and rhythmic way. The paper enforces the significance of the... 相似文献
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M. Luisa Molina A. Marcela Giudici José A. Poveda Gregorio Fernández-Ballester Estefanía Montoya M. Lourdes Renart Asia M. Fernández José A. Encinar Gloria Riquelme Andrés Morales José M. González-Ros 《The Journal of biological chemistry》2015,290(42):25745-25755
There is increasing evidence to support the notion that membrane proteins, instead of being isolated components floating in a fluid lipid environment, can be assembled into supramolecular complexes that take part in a variety of cooperative cellular functions. The interplay between lipid-protein and protein-protein interactions is expected to be a determinant factor in the assembly and dynamics of such membrane complexes. Here we report on a role of anionic phospholipids in determining the extent of clustering of KcsA, a model potassium channel. Assembly/disassembly of channel clusters occurs, at least partly, as a consequence of competing lipid-protein and protein-protein interactions at nonannular lipid binding sites on the channel surface and brings about profound changes in the gating properties of the channel. Our results suggest that these latter effects of anionic lipids are mediated via the Trp67–Glu71–Asp80 inactivation triad within the channel structure and its bearing on the selectivity filter. 相似文献
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Siddiqui MR Taha A Moorthy K Hussain ME Basir SF Baquer NZ 《Journal of biosciences》2005,30(4):483-490
Trigonella foenum graecum seed powder (TSP) and sodium orthovanadate (SOV) have been reported to have antidiabetic effects. However, SOV exerts hypoglycemic
effects at relatively high doses with several toxic effects. We used low doses of vanadate in combination with TSP and evaluated
their antidiabetic effects on antioxidant enzymes and membrane-linked functions in diabetic rat brains. In rats, diabetes
was induced by alloxan monohydrate (15 mg/100 g body wt.) and they were treated with 2 IU insulin, 0.6 mg/ml SOV, 5% TSP and
a combination of 0.2 mg/ml SOV with 5% TSP for 21 days. Blood glucose levels, activity of superoxide dismutase (SOD), catalase
(CAT), glutathione peroxidase (GPx), Na+/K+ ATPase, membrane lipid peroxidation and fluidity were determined in different fractions of whole brain after 21 days of treatment.
Diabetic rats showed high blood glucose (P < 0.001), decreased activities of SOD, catalase and Na+/K+ ATPase (P < 0.01,P < 0.001 andP < 0.01), increased levels of GPx and MDA (P < 0.01 andP < 0.001) and decreased membrane fluidity (P < 0.01). Treatment with different antidiabetic compounds restored the above-altered parameters. Combined dose ofTrigonella and vanadate was found to be the most effective treatment in normalizing these alterations. Lower doses of vanadate could
be used in combination with TSP to effectively counter diabetic alterations without any toxic effects. 相似文献
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Molina ML Barrera FN Fernández AM Poveda JA Renart ML Encinar JA Riquelme G González-Ros JM 《The Journal of biological chemistry》2006,281(27):18837-18848
Different patterns of channel activity have been detected by patch clamping excised membrane patches from reconstituted giant liposomes containing purified KcsA, a potassium channel from prokaryotes. The more frequent pattern has a characteristic low channel opening probability and exhibits many other features reported for KcsA reconstituted into planar lipid bilayers, including a moderate voltage dependence, blockade by Na(+), and a strict dependence on acidic pH for channel opening. The predominant gating event in this low channel opening probability pattern corresponds to the positive coupling of two KcsA channels. However, other activity patterns have been detected as well, which are characterized by a high channel opening probability (HOP patterns), positive coupling of mostly five concerted channels, and profound changes in other KcsA features, including a different voltage dependence, channel opening at neutral pH, and lack of Na(+) blockade. The above functional diversity occurs correlatively to the heterogeneous supramolecular assembly of KcsA into clusters. Clustering of KcsA depends on protein concentration and occurs both in detergent solution and more markedly in reconstituted membranes, including giant liposomes, where some of the clusters are large enough (up to micrometer size) to be observed by confocal microscopy. As in the allosteric conformational spread responses observed in receptor clustering (Bray, D. and Duke, T. (2004) Annu. Rev. Biophys. Biomol. Struct. 33, 53-73) our tenet is that physical clustering of KcsA channels is behind the observed multiple coupled gating and diverse functional responses. 相似文献
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Cipok M Aga-Mizrachi S Bak A Feurstein T Steinhart R Brodie C Sampson SR 《Biochemical and biophysical research communications》2006,345(2):817-824
Certain PKC isoforms are stimulated by insulin and interact with IR as well as with IRS, but it is still not clear if specific PKC isoforms regulate IR signaling directly or through IRS-1. PKCalpha may regulate IRS activity in response to insulin. We investigated the possibility that PKCalpha may be important in insulin signaling. Studies were conducted on skeletal muscle in adult mice and on L6 skeletal cells. PKCalpha is constitutively associated with IRS-1, and insulin stimulation of PKCalpha causes disassociation of the two proteins within 5 min. Blockade of PKCalpha inhibited insulin-induced disassociation of PKCalpha from IRS1. Selective inhibition of PKCalpha increased the ability of insulin to reduce blood glucose levels. Insulin stimulation activates PKB and increases the association of PKCalpha with PKB. Blockade of PKCalpha increased threonine phosphorylation of PKB. We suggest that PKCalpha regulates insulin signaling in skeletal muscle through its disassociation from IRS-1 and association with PKB. 相似文献
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Ann-Kathrin Oehme Asia N. Rashed Barbara Hefele Ian C. K. Wong Wolfgang Rascher Antje Neubert 《PloS one》2012,7(9)