Results 31 to 40 of about 771,799 (185)

Simple sequence repeats and their expansions: role in plant development, environmental response and adaptation

open access: yesNew Phytologist, Volume 247, Issue 2, Page 504-517, July 2025.
Summary Repetitive DNA is a feature of all organisms, ranging from archaea and plants to humans. DNA repeats can be seen both in coding and in noncoding regions of the genome. Due to the recurring nature of the sequences, simple DNA repeats tend to be more prone to errors during replication and repair, resulting in variability in their unit length ...
Sridevi Sureshkumar   +3 more
wiley   +1 more source

Plant–microbe interactions drive the rhizosphere microbial assembly and nitrogen cycling in a subtropical forest

open access: yesFunctional Ecology, Volume 39, Issue 5, Page 1274-1287, May 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Interactions between plants and soil microorganisms in the rhizosphere are vital for maintaining the nutrient cycle and stability of terrestrial ecosystems. Nitrogen, closely related to carbon (C) cycling and ecosystem productivity, undergoes transformation by soil ...
Ru Wang   +9 more
wiley   +1 more source

Comparison of the in vitro antibiofilm activities of otic cleansers against canine otitis externa pathogens

open access: yesVeterinary Dermatology, Volume 36, Issue 2, Page 148-158, April 2025.
Background – Biofilm production by canine otitis externa (COE) pathogens and resistance development to multiple antimicrobials are commonly reported problems in veterinary practice. The use of adjuvants to disrupt biofilms may be a viable adjunctive therapy.
Bhumika F. Savaliya   +3 more
wiley   +1 more source

糖尿病肾病维持性血液透析患者血清氨基酸变化

open access: yesZhongguo shiyan zhenduanxue, 2015
糖尿病肾病的患者,疾病本身代谢紊乱明显,又受到严格饮食控制的约束,营养不良表现更加突出,直接影响血液透析患者的死亡率、各种并发症的发病率[1,2]。对血透患者的氨基酸谱进行测定是了解患者营养状况的一个重要方面,肌肉是人体最大的氨基酸库,作为衡量尿毒症患者营养状况的指标,肌肉氨基酸较血浆氨基酸更为可靠。但测定肌肉氨基酸有一定的创伤,故患者难以接受[3]。血清氨基酸是机体氨基酸代谢库的一部分 ...
李爽, 杜娟, 胡曼丽
doaj  

Comparative enhancement of H+ and OH− treatment on electromagnetic interference shielding in aligned and compact Ti3C2Tx MXene film

open access: yesRare Metals, Volume 44, Issue 3, Page 1833-1843, March 2025.
Graphical abstract AbstractThe pressing demand for ultrathin and flexible shields to counter electromagnetic interference (EMI) has sparked interest in Ti3C2Tx MXene materials due to their exceptional electrical conductivity, tunable surface chemistry, and layered structure.
Zhao‐Yang Li   +5 more
wiley   +1 more source

Intermanufacturer assessment of diagnostic performance of angiogenic ratio vs glycosylated fibronectin in women with suspected pre‐eclampsia

open access: yesUltrasound in Obstetrics &Gynecology, Volume 64, Issue 5, Page 620-625, November 2024.
ABSTRACT Objective To compare the diagnostic performance of different manufacturers' immunoassays for the soluble fms‐like tyrosine kinase‐1 (sFlt‐1)‐to‐placental growth factor (PlGF) ratio with that of a point‐of‐care (PoC) test for glycosylated fibronectin (GlyFn) in women with suspected pre‐eclampsia (PE).
I. Y. M. Wah   +7 more
wiley   +1 more source

八只东北虎肾中氨基酸的分析

open access: yes野生动物学报, 1994
本实验用日立835~50氨基酸分析仪测定了8只东北虎肾混合物中的十九种蛋白质水解氨基酸。水解采用保护性氧化盐酸水解蛋白质,分析采用包括含硫氨基酸衍生物在内的50min快速分析法。所测得的总氨基酸含量高达绝干肾重的68.34%,相当于鲜肾重21.51%,各氨基酸比例较为适宜,且含有本方法所能测出的动物全部九种必需氨基酸和半必需氨基酸。其含量和分布亦较丰富而适宜。由此得知东北虎肾具有较高的生物学价值,且具多学科理论和应用价值。
刘昕晨   +9 more
doaj  

Topical and transdermal botanical formulations of the Chinese pharmacopoeia—A review

open access: yesPhytotherapy Research, Volume 38, Issue 9, Page 4716-4735, September 2024.
Abstract In pharmaceutics, ingredients are classified as active ingredients and excipients. In topical/transdermal phytomedicines, an ingredient may serve both functions. Published information on these dual‐purpose ingredients and their pharmacological relevance is limited.
Jingyi Gu   +3 more
wiley   +1 more source

化学修饰对川泽泻凝集素生物学活性和构象的影响

open access: yes四川大学学报. 自然科学版, 2014
用特异性化学修饰和荧光光谱的方法分析川泽泻凝集素(APL)活性位点氨基酸的分布情况.研究结果发现,色氨酸的化学修饰使活性降低80%,统计出每分子APL含有2个色氨酸残基,一个色氨酸位于凝集活性中心,另一个位于分子表面的疏水袋中,与凝集活性无关.精氨酸的化学修饰使活性降低50%,半胱氨酸的化学修饰使活性完全丧失.天冬氨酸、谷氨酸、酪氨酸、丝氨酸/苏氨酸等化学修饰后凝集活性无明显变化.表明色氨酸、精氨酸和半胱氨酸对凝集素的凝集活性中心的构成起重要作用,天冬氨酸、谷氨酸、酪氨酸、丝氨酸 ...
刘超, 刘芳, 伏秦超, 徐小超
doaj  

高必需氨基酸玉米突变体的筛选

open access: yes, 1994
谷物是世界上多数人的主食,但在谷物的营养成分中却缺少人类和非反刍动物所必需的氨基酸:赖氨酸、苏氨酸、色氨酸等。而氨基酸是按一定比例合成蛋白质的,缺少其中任何一种,都会限制其他氨基酸的利用。所以谷物中最缺少的赖氨酸又称为第一限制性氨基酸,水稻和小麦的第二限制性氨基酸是苏氨酸,玉米的第二限制性氨基酸是色氨酸。因此,提高这些氨基酸的含量将大大改善氨基酸平衡 ...
缪树华
core  

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