Results 31 to 40 of about 161 (116)

两种精子优选法对精子运动参数、活率影响

open access: yesZhongguo shiyan zhenduanxue, 2005
目的 评价Percoll密度梯度法和上游法两种精子分离方法对精子运动参数和活率影响。方法 应用计算机精液分析仪进行精子运动参数分析 ,伊红 Y染色分析精子活率。结果 Percoll和上游两种方法优选后精子运动能力和活率均明显高于优选前 (P
王洪亮   +3 more
doaj  

鶏精子の凍結保存用希釈液について [PDF]

open access: yes, 1977
著者らはこれまでの実験で,グリセリンの最終濃度が7%になるよう調整した卵黄ブドウ糖希釈液を用いて鶏精液を4倍に希釈して凍結保存を実施してきたが,その受精率は50~60%の水準にとどまった。今回この従来の希釈液を対照区とし,新たにnon‐yolk5.7%ブドウ糖液を試験区としてそれぞれ4倍希釈で凍結保存を実施し,融解後の精子活力,奇形率および受精率について比較検討した結果,融解後の精子活力については両区間に明らかな有意差が認められた(P>0.01)が奇形率においては有意差は認あられなかった ...
Shirakawa, Yoshihisa   +2 more
core  

Beyond Motivation: Modeling the Predictive Role of L2 Pride in Informal Digital Learning of English

open access: yesInternational Journal of Applied Linguistics, Volume 35, Issue 4, Page 1938-1952, November 2025.
ABSTRACT This study investigates the role of second language (L2) pride—an understudied affective factor—in shaping learners’ language learning motivation and involvement with informal digital learning of English (IDLE). Drawing on questionnaire data from 1388 Chinese university EFL students, the study employs structural equation modeling to examine ...
Minlin Minny Zou   +3 more
wiley   +1 more source

精浆抗精子抗体与精液主要参数关系分析

open access: yesZhongguo shiyan zhenduanxue, 2003
目的 分析精液量、密度、活动率和活力与精浆抗精子抗体 (AsAb)的关系。方法 :间接血凝法测定AsAb。结果 :32 5 3例男性不育就诊者精浆AsAb阳性率为 9.81%。随着精液量、密度、活动率、活力降低 ,AsAb阳性率均明显增加 (P
刘睿智   +6 more
doaj  

中泰中医教育体系的比较探析 [PDF]

open access: yes, 2019
培养高层次的医学人才是医学不断发展、创新的基础。随着人们对中医学的深入了解,运用中医治病防病已日益被人们所接受。中医疗法在当今的疾病防治和促进身心健康等方面均取得了举世瞩目的疗效。在泰国,由于中医药在防病治病和养生保健中的确切疗效,使其逐渐成为泰国医疗保健领域中不可缺少的部分。因此深入探讨中泰中医人才培养体系的异同,对系统认识中泰中医学具有重要的指导意义。分析比较两种中医学人才培养体系的异同,探求各自的特色,取长补短,可促进中泰中医学的创新和发展,同时也对世界传统医学的交融和发展具有积极的推动作用 ...
何其达   +4 more
core   +1 more source

Creating a statewide model of infant and early childhood mental health consultation: A Colorado case study

open access: yesInfant Mental Health Journal: Infancy and Early Childhood, Volume 46, Issue 5, Page 615-630, September 2025.
Abstract The use of Infant and Early Childhood Mental Health Consultation (IECMHC) has grown dramatically over the past decade to support the skills and reflective capacity of adults who care for infants and young children birth to kindergarten entry. Research to date has shown promise for IECMHC to support children's social and emotional development ...
Margaret Franko   +6 more
wiley   +1 more source

用低渗膨胀试验评价黑猩猩冷冻精子的膜完整性

open access: yes野生动物学报, 2011
精液品质评定的常见方法有精子活力、畸形率和顶体完整率等指标,但这些指标不能评定精子的真实受精能力。目前低渗膨胀试验作为检验精子膜功能的一种方法得到广泛认可,利用它可检验具有完整膜的精子是否具有生化活性。本试验通过对冷冻2只黑猩猩精液进行低渗膨胀来评定冷冻精子的膜完整性。试验结果显示,本研究中的黑猩猩的冷冻精子在低渗溶液中的膨胀率较高,表明试验黑猩猩的冷冻精液有较高的活力,精子具有较高的穿透率和受精能力。
黄志宏   +5 more
doaj  

Conformational change and inactivation of arginine kinase in hexafluoroisopropanol: Evidence for existence of an unfolding equilibrium intermediate(精氨酸激酶在六氟异丙醇溶液中结构与活性的变化:去折叠平衡态中间体存在的证据)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2007
利用内源荧光、1-苯氨基萘-8-磺酸(ANS)荧光、远紫外-圆二色光谱以及酶活力测定等手段研究了精氨酸激酶在1,1,1,3,3,3-六氟异丙醇(HFIP)溶液中变性后结构与活性的变化.为避免蛋白质聚沉的出现,实验中采用的变性剂浓度低于8%.当六氟异丙醇浓度为0.5%~1.5%时,蛋白质的二级结构和内源荧光发射峰位都没有发生明显的变化,而外源ANS荧光强度则显著增强.继续提高变性剂浓度至6%后,内源荧光发射峰位明显红移、二级结构含量增大、外源荧光减弱、酶活力完全丧失.内源荧光和外源ANS荧光的变化证明 ...
LIHai-long(李海龙)   +3 more
doaj   +1 more source

めん羊の繁殖性向上に関する研究 : 特に誘起発情雌羊群に対する雄羊の交配状況 [PDF]

open access: yes, 1987
Article信州大学繊維学部農場研究報告 13: 26-30(1987)departmental bulletin ...
伊藤, 耕三   +10 more
core  

Fluctuating salinity during development impacts fish life histories

open access: yesJournal of Animal Ecology, Volume 94, Issue 9, Page 1848-1865, September 2025.
Global freshwater ecosystems are increasingly threatened by salinisation. Salinity levels not only rise but also fluctuate due to extreme climate events and human activities. This study shows that stable elevated salinity accelerates reproduction in a freshwater fish, but fluctuations in salinity reduce reproductive output, with sex‐specific effects on
Meng‐Han Joseph Chung   +4 more
wiley   +1 more source

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