Results 31 to 40 of about 1,257 (56)
解冻单囊胚形态评分与早期血清β-人绒毛膜促性腺激素浓度和活产的相关性
Zhongshan Daxue xuebao. Yixue kexue ban, 2023 目的在解冻单囊胚移植后HCG阳性患者中，评估囊胚形态评分对第 12 天血清β-人绒毛膜促性腺激素（β-hCG）水平和活产结局的影响；分析血清β-hCG 水平对活产的预测价值。方法回顾本院2016年1月至2020年5月的519个单囊胚激素替代治疗-冻融胚胎移植（HRT-FET） 周期HCG阳性患者的数据。先根据Gardner 囊胚分级分为4组（AA、AB、BA和BB）；再根据囊腔扩张程度分期分为4组（3期、4期、5期、6期，Gardner 评分）。比较不同分级和分期的囊胚移植后第 12 天的血清β ...
蔡小华, 欧建平, 李涛
doaj
Functional Ecology, Volume 40, Issue 7, Page 2128-2142, July 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Soil organic nitrogen (SON) transformation is critical for global nutrient cycling and ecosystem productivity, yet how its responsiveness to climate change differs across diverse land use types remains poorly resolved.
Xinyi Yang +10 more
wiley +1 more source
Gongye shui chuli, 2007 从筛选到的絮凝剂产生菌中构建出比单一菌群产生更高活性絮凝剂的复合菌群——复合1(BAFRT4+CYGS1)。为降低培养成本,接种复合1至啤酒废水培养基中,产生了絮凝活性为96.8%的微生物絮凝剂(MBF)。所产MBF对靛蓝印染废水有良好的处理效果,CODCr去除率和脱色率最高分别达79.2%和87.6%。研究了复合1所产MBF在优化工艺条件下处理靛蓝印染废水的絮凝过程,并得出了MBF去除CODCr和脱色的经验动力学方程。
张志强 +4 more
doaj +2 more sources
Zhongguo shiyan zhenduanxue, 2005 目的了解产CTX-M型超广谱β-内酰胺酶（ESBLs）大肠埃希菌分离株的耐药特点,为临床用药提供数据。方法收集我院临床分离的确证为产ESBLs的大肠埃希菌151株,应用聚合酶链反应（PCR）检测产ESBLs株质粒的CTX-M基因。采用NCCLS推荐的琼脂稀释法测定11种抗生素对所有产酶株的最低抑菌浓度（MIC）,并对结果进行分析。结果PCR结果显示,151株产ESBLs大肠埃希菌中CTX-M阳性为139株。在139株产CTX-M大肠埃希菌中,亚胺培南的抗菌活性最强,敏感率为100%,MIC90为0 ...
张阮章 +4 more
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Journal of Animal Ecology, Volume 95, Issue 7, Page 1178-1193, July 2026.This population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Jia Zheng +5 more
wiley +1 more source
野生动物学报, 1994 提高哺乳期海狸鼠成活率的初浅体会苏盛源，刘久香（锦州畜牧兽医学校）（锦州市畜牧兽医站）１９９０－１９９１年锦州郊区有７５户农民先后引入种海狸鼠５１０只。合计产仔２９９６只，哺乳期死亡４２５只，占产仔数１４％，死亡率偏高。怎样提高仔鼠成活率呢？结合两年...
苏盛源, 刘久香
doaj
Global Change Biology, Volume 32, Issue 7, July 2026.Grassland recovery following nutrient cessation is asymmetric and strongly shaped by nutrient enrichment history. Higher nutrient addition rates and longer enrichment duration caused larger departures from control conditions, with biomass recovering more rapidly than species richness over decadal timescales.
Miao He +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Engineering of the catalyst interface and modulation of transition–metal d–band play critical roles in the electrocatalytic hydrogen evolution reaction (HER). Herein, a synthetic strategy is developed to fabricate nitrogen‐doped carbon nanotubes (N–CNTs)–supported Ni3Se4–CeO2 heterojunction catalysts through a facile chemical vapor deposition (
Zhiqiang Sun +10 more
wiley +1 more source
Gongye shui chuli, 2012 以玉米穗轴为原料、碳酸氢钠为化学活化剂通过微波辐照制备活性炭,采用中心组合设计(CCD),运用响应面法(RSM)进行工艺参数优化。考察了辐照功率、辐照时间和浸渍比对亚甲基蓝(MB)吸附值和产率的影响,通过模型优化确定最佳工艺参数为:辐照功率为385.74 W,辐照时间为5 min,浸渍比为4,该条件下制备的活性炭的亚甲基蓝(MB)吸附值和产率的实验结果和预测值分别为241.76 mg/g、27.39%和253 mg/g、28.28%,二者基本相符,验证了模型的有效性。
蒋莉 +4 more
doaj +2 more sources
Zhejiang Daxue xuebao. Lixue ban, 2005 采用膨胀颗粒污泥床(EGSB)处理涤纶仿真丝绸印染废水，通过污泥负荷和水力负荷的递增来启动反应器，从活性污泥性状和反应器性能两方面考察启动过程.活性污泥依次经历絮状、膨胀、细粒化和成熟颗粒四个阶段，反应器性能与此相应变化，有机物去除率和产气率逐渐提高且趋于稳定.结果表明，EGSB处理涤纶仿真丝绸印染废水的启动过程用了 50 d左右，启动后形成的颗粒污泥床层占反应器有效容积的25% 和污泥量的65% 左右，COD去除率为57% ~64%，产气率为0.12~0.17 m3 • (kgCOD)-1 ...
GUANBao-hong(官宝红) +3 more
doaj +1 more source