Results 31 to 40 of about 1,278 (109)
Gradient distributions of nitrogen and organic carbon in the soils from inland to tidal flat in the Yellow River Delta [PDF]
, 2014 黄河三角洲是我国典型的通过黄河冲积泥沙填海造陆形成的近代沉积区。区域受到黄河冲积、沉积等自然过程和农业耕种熟化等人类活动的双重影响。本研究通过在黄河三角洲地区内陆到河口海湾不同距离采集典型土壤类型剖面发生层样品，探讨土壤有机碳、总氮等生源要素的空间分布规律，为阐明我国典型海岸带地区陆源碳、氮的输送及循环特征提供基础依据。研究结果表明，黄河三角洲内陆与河口地区呈现出完全不同的土壤碳、氮分布规律。表层土壤碳、氮含量在黄河沿岸及三角洲南部均表现出由陆向海逐级递减的空间分布特征 ...
李远 +4 more
core +1 more source
Developing a protocol for determination of nitrogen stable isotope ratios and its application to analysis of nitrogen transformation in a paddy field [PDF]
, 2022 University of Yamanashi (山梨大学)博士(工学)application ...
CAO THI, THUY HAI
core
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT This study introduces novel nonequiatomic TiZrCoCrMoCux (x = 0, 5, 10; at%) medium‐entropy alloys (MEAx) tailored for orthopedic implants, synergistically combining the biocompatibility of Ti‐based alloys, the wear resistance of CoCrMo alloys, and the antibacterial/osteogenic attributes of Cu. The alloy's microstructure, mechanical properties,
Hang Yu +9 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 土壤微生物是土壤的重要组成部分,对土壤肥力的形成和植物营养的转化起着积极的作用,是土壤肥力和环境变化的重要指标。通过土壤微生物量测定,研究新银合欢植物篱对紫色土区坡地农耕地、经济林地2种土地利用方式及10°,15°坡度下0-20cm土层土壤微生物特性的影响。研究发现:新银合欢植物篱可以明显提高土壤中细菌、放线菌、真菌的数量及微生物量碳、氮含量;植物篱对经济林地小区土壤微生物数量,微生物量碳、氮的影响作用总体上大于对农耕地小区的,同时对10°农耕地的影响作用总体上大于对15°农耕地的;下坡的三大微生物数量,
郭甜 +7 more
doaj
On the Damage Tolerance of Diffusion Bonded Titanium–Aluminum Phase Biomimetic Composites
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The biomimetic design principles of natural structures involve the strategic integration of stiff and compliant phases to synergistically enhance strength and toughness. Its evolutionary refined natural armor, characterized by a specialized microarchitecture, enables superior damage tolerance.
Shuai Tong +10 more
wiley +1 more source
The Accommodation of Nitrogen to Polycyclic Aromatic Hydrocarbons (PAHs) Pollution in Avicennia marina [PDF]
, 2011 近年来，红树林湿地有机污染问题越来越突出，日益引起了人们的关注。根际是植物进行物质交换频繁的特殊微型生态区域，是有机物特别是持有性有机污染物进入红树植株内部的门户。根际微域复杂的微生物对植物的生长非常重要，并与有机污染物的吸收、转化和降解等生态化学行为及毒理效应密切相关。然而有关红树林湿地，营养元素对有机污染物毒害调节作用的研究鲜见报道，特别是对红树植物根际的微生物生态效应我们仍然所知甚少。 本研究通过自制根际套管，完全做到了根际研究器皿体积小，能避免施毒不匀、植物个体差异等实验干扰因素 ...
江山
core
Contribution of microcosm experiments to conservation science
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Microcosms, or miniature experimental systems, have been used to develop models and theories in ecology. However, their contribution to conservation science is unclear. We explored the application, design, and impact of microcosms in conservation science from 469 systematically identified articles published from 1986 to 2023.
Eleanor R. Stern +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2008 2003—2004年开展对9个有代表性的不同产量的苹果园秋季土壤的养分、微生物类群及土壤酶活性的研究,获得不同产量苹果园的土壤微生物生态状况。结果表明,各苹果园的土壤养分、微生物数量、多样性和酶活性均表现出较大差异。随土壤碱解氮、速效磷、速效钾、总碳含量的增加,产量水平呈增高趋势。高产园土壤微生物数量高,多数土壤酶活性强,微生物多样性好。土壤微生物中细菌数量、微生物多样性、蛋白酶、磷酸酶活性可作为评价果园土壤肥力的生物指标。果树产量与土壤微生物类群和数量具有显著正相关,与速效磷、速效钾 ...
陈伟, 姜中武, 胡艳丽, 束怀瑞
doaj
Veterinary Dermatology, Volume 37, Issue 1, Page 148-160, February 2026.Background: The antibacterial efficacy of chlorhexidine shampoo is directly affected by formulation and bathing factors. Hypothesis/Objective: To evaluate the in vitro antibacterial efficacy of chlorhexidine‐containing shampoos at various dilutions and to compare their lathering ability.
Emily E. Binversie +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2002 对经过 10年半旱式免耕定位试验的水稻土主要微生物类群数量和微生物生物量的变化进行对比研究 ,结果表明 :实行半旱式厢作及垄作免耕法能够迅速地提高土壤有机质、全氮、全磷和速效氮、磷的水平 ;微生物数量和微生物生物量变化一般存在季节性规律 :春季高 ,夏季至夏末降低 ;各处理土体上层和下层 (0～ 7.5 cm,7.5～15 cm)的基本肥力特征及微生物特征无明显区别 ;免耕处理土壤 ,其微生物的季节性变幅较小 ,垄上或厢上土壤微生物生物量甚至表现反季节性 ,整个生长季节内稳中有升 ...
张磊 肖剑英 等
doaj +2 more sources