Results 11 to 20 of about 11,974 (119)
抗Ⅹa因子活性监测在慢性肾功能衰竭患者维持性血液透析中精准抗凝的研究
Zhongguo shiyan zhenduanxue, 2022 目的 为慢性肾功能衰竭维持性血液透析患者提供精准抗凝的监测手段，避免抗凝不足带来的透析器及管路凝血，血栓形成风险以及抗凝过量引起的出血事件。方法 选取2020年1月至2020年12月在新疆医科大学第六附属医院血液透析室维持性血液透析治疗的患者，共计80例，根据患者抗Ⅹa因子活性分为3组 ...
李秀文, 刘郁
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Photocatalytic H2 evolution coupled with biomass upgrading offers a sustainable route for clean energy conversion and high‐value chemical synthesis. Herein, an in situ grown S‐scheme MnS/MnB‐MBene heterojunction (denoted as SMx) was fabricated via alkaline etching of Mn2AlB2 followed by controlled sulfurization.
Pei Li +7 more
wiley +1 more source
芒苞草(Acanthochlamys bracteata P.C.kao)形态学和胚胎学研究 Ⅲ.双受精,胚乳发育和胚胎发生的研究
四川大学学报. 自然科学版, 1993 芒苞草(Acanthochlamys bracteata)为珠孔受精,进人胚囊的二个精子分别与卵细胞和中央细胞的次生核进行正常的双受精,其受精作用属有丝分裂前型.受精后的初生胚乳核立即分裂,其发育方式为核型。合子休眠期较长,胚胎发育过程中基细胞有两种分裂方式。也观察了在以上发育过程中蛋白质与淀粉粒的积累与消失。
李平, 高宝莼
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Epidermal bioelectronics is a transformative technology for continuous health monitoring and human‐computer interaction. However, the mechanical and physiological mismatch at the skin–device interface limits its long‐term application. Electrospun nanofiber membranes (ENMs), with their unique three‐dimensional hierarchical porous network and ...
Jiahua Ni +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT NiCoCrAlYTa coatings are widely used as bond coats in thermal barrier coating (TBC) systems for gas turbines and aeroengines to provide oxidation resistance and support the formation of a protective thermally grown oxide (TGO). Herein, high‐current pulsed electron beam (HCPEB) modification was utilized to strengthen a NiCoCrAlYTa coating by ...
Xiangcheng Li +6 more
wiley +1 more source
四川大学学报. 自然科学版, 1994 通过光镜及扫描电镜对获能过程中的猪精子形态进行观察，发现其形态结构呈连续性变化头帽脱落，顶体染色由深变浅，精子核及核后帽的染色则逐渐加深。在此过程中，少数精子可能发生顶体反应，由扁卵圆形变为梭形。获能时间以４～６ｈ为宜。此外还发现猪的品种不同，其精子形态结构也存在差异。
刘侠, 王子淑, 陈文元, 王喜忠
doaj
Haiyang yu huzhao胭脂鱼(Myxocyprinus asiaticus)是亚洲特有的淡水珍稀鱼类，但由于人类活动和生态环境的变化，胭脂鱼数量急剧减少，研究其精子冷冻保存技术及建立精子冷冻保存库，对种质资源的保护和遗传育种具有重要意义。选取健康的雄性胭脂鱼，经人工催产后获得成熟精子，首先对4种精子稀释液种类(D-17、D-15、D-20、人工精浆A)、4种抗冻剂种类(DMSO、GLY、MeOH、PG)及4种DMSO抗冻剂浓度(6%、8%、10%、12%)进行筛选，其次选取筛选后冷冻效果最好的冻精与鲜精做受精实验 ...
丁 小雨 +8 more
doaj +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Conductive hydrogels show great potential in flexible electronics and biomedical devices, yet their practical applications are often hindered by insufficient mechanical strength, poor environmental stability, and limited functionality. To address these challenges, this study has developed a hydrogel platform that integrates diagnosis and ...
Wei Jiang +9 more
wiley +1 more source
四川大学学报. 自然科学版, 2002 作者对慢性细菌性前列腺炎 (CBP)伴不育症患者 (31例 )及正常有生育男子 (15例 )的精子 ,以去透明带地鼠卵穿透试验 (HOP)、精子尾部低渗肿胀试验 (HOS)、精子头部DNA荧光染色有效精子计数 (ESC)为指标 ,探讨了慢性细菌性前列腺炎对精子受精能力、精子膜及DNA双螺旋结构的影响 .结果显示 :CBP组的精子穿卵率和受精卵外精子附着数及ESC均明显地低于对照组 ...
魏莎莉 +5 more
doaj
Research Progress and Prospect of Single‐Atom Materials in Tumor Catalytic Therapy
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Tumor catalytic therapy (TCT), an emerging therapeutic modality, exerts specific cytotoxic effects on tumor cells by catalyzing endogenous substances within the tumor microenvironment (TME)—including hydrogen peroxide (H2O2), glucose, and glutathione—to generate reactive oxygen species (ROS) or deplete protective biomolecules.
Youyu Wang +4 more
wiley +1 more source