驱蚊草离体快繁体系的建立     

许衡  杨和生  黄思梅  赖升良  周功健 《嘉应学院学报》2006,24(3):54-56

通过对离体茎段的培养,建立了驱蚊草快繁体系。丛生芽诱导的培养基是MS+IBA(0.1 mg/L)+KT(1 mg/L);继代培养的最适培养基为MS+IBA(0.4 mg/L)+KT(1 mg/L);生根培养基为1/2MS。  相似文献   

Islamic parents’ attitudes and beliefs towards school-based sexual and reproductive health education programmes in Oman     

Omar Al Zaabi  Margaret Heffernan  Eleanor Holroyd  Mervyn Jackson 《Sex education》2019,19(5):534-550

School-based comprehensive sexuality education (CSE) programmes play an important role in reducing young people’s sexual risk behaviour and promoting health and well-being. There is limited evidence regarding the attitudes and beliefs of parents towards the implementation of school-based CSE programmes in Islamic cultural settings, including Oman, which this mixed-method study set out to explore. A convenience sample of 250 parents, with equal numbers of mothers and fathers of children aged 12–14 years (grades 7–9) at two urban public pre-secondary schools in Saham, completed a paper-based self-administered questionnaire in Arabic. We found most parents (72.8%) supported school-based CSE programmes that conformed to Islamic requirements of pre-marital sexual abstinence, but there was some opposition. Almost all parents supported comprehensive age-appropriate CSE being taught to students aged 10–15 years, including topics perceived as controversial in Omani culture, except for birth control and safer sex. Most parents considered themselves, school teachers and school nurses to be important sources of CSE. The study findings which suggest strong parental support for CSE programmes can facilitate education policy, CSE curriculum decision-makers and school healthcare-providers in Oman, other Middle Eastern countries, and countries with Muslim immigrant populations.  相似文献   

力量练习对中老年人身体机能的影响及健身启示   总被引：1，自引：0，他引：1  

刘晓辉  张宗国 《吉林体育学院学报》2009,25(3):64-66

力量训练对中老年人身体机能中肌肉机能的影响主要表现为肌肉质量提高,肌肉体积、力量增大,Ⅱ型肌纤维百分比增多;对内分泌机能的影响主要表现为力量训练可提高中老年血清睾酮和生长素的水平并产生适应性变化。上述研究结论对中老年健身有以下启示：改变中老年人目前健身观念,使其在潜意识中尽快接受力量健身锻炼;强化Ⅱ型肌纤维的锻炼;力量锻炼开始时间应从青年时期起并坚持到中老年;力量锻炼可有效控制中老年肥胖;力量锻炼应掌握科学的方法;力量锻炼应穿插在其他健身内容组合中。  相似文献   

Imagining accidental fetal citizens: pregnant Mainland women and the cultural politics of birthright citizenship     

Tsung-yi Michelle Huang  Yen-fu Lai 《Inter-Asia Cultural Studies》2019,20(1):73-90

This essay looks at the mobility of pregnant Mainland women in Hong Kong to expose the reverberations of the SAR government's immigration policies relating to cross-border birth tourism. Pregnant Mainland women and their children (fetuses), as emergent social subjects, embody conflict and the negotiation between population governance and economic benefits. The government denies pregnant Mainland women the right to give birth in Hong Kong based on their non-eligible status while admitting their children to be born in Hong Kong on the grounds that their children meet Hong Kong's future demand for population renewal, in this way boosting the development of childbirth tourism. However, the localism, which has had an extensive influence on Hong Kong local society in recent years, has rejected the SAR government's “population renewal” imaginary by suggesting its own “locust imaginary.” The government's acceptance and the local's exclusion of the population flow between China and Hong Kong imply distinct cross-border subject imaginations. Only by contextualizing and critically analyzing the various othering identities such as the non-eligible or locusts can we better understand the cultural politics of Hong Kong birthright citizenship over recent years.  相似文献   

带潜伏期和年龄结构流行病模型的稳定性     

杨金根  张留伟 《许昌学院学报》2010,29(5)

根据肺结核的传播特点,建立了带潜伏期和潜伏年龄的数学模型.证明了当基本再生数R0<1时,系统无病平衡点是局部和全局渐近稳定的;当R0>1时,无病平衡点不稳定,此时系统存在一个地方病平衡点,并证明了该地方病平衡点是局部渐近稳定的.  相似文献   

刺蒺藜的药理及在运动中的应用研究     

武桂新 《吉林体育学院学报》2011,27(3):1-3

分析评价基于刺蒺藜提取物的运动营养品的合理使用。方法：检索体育科学杂志主要的数据库中国知网、Springer、Ovid、LWW、Elsever,研究分析刺蒺藜提取物的药理研究和在运动员人体应用效果、应用方法及对运动能力的影响研究进展。结果：刺蒺藜皂苷的生殖药理和生殖内分泌药理的研究,使刺蒺藜提取物成为运动营养品市场上调节运动内分泌功能的主流营养补充品,具有促进运动员人体睾酮分泌的潜在作用。由于人体自身的内分泌调节作用和运动对运动员机体内分泌调节的影响,蒺藜提取物对动物或人体生殖内分泌的影响研究并不十分充分,其作用程度也较易受到机体整体状态的影响。结论：刺蒺藜提取物对调节运动员内分泌的效果目前还不确定,进一步规范市场上产品的质量标准有助于更好地研究观察刺蒺藜提取物对运动员身体机能和运动能力的作用效果。  相似文献   

《甩鞭》的生命意识     

郑宗荣  李俊 《四川三峡学院学报》2014,(6):92-94

《甩鞭》写了土改前后山西山区农民的生存状态与生命形态,主要以王引兰的生命历程为线索,展示一个普通女人活着的艰难。文本中蕴含着丰富的生命意识,表现为浓烈的生殖崇拜意识,王引兰童年愿望的满足、补偿心理的实现和性的满足。  相似文献   

赛场噪声对定量负荷时机体疲劳的影响     

翁锡全  林文弢  邓树勋 《广州体育学院学报》1997,(4)

通过对8名体育学院男生分别在无、有赛场噪声暴露下进行定量负荷踏车运动后心率、反应时、运动时、握力、肌肉用力感以及睾酮/皮质醇等指标的测定,探讨赛场噪声对机体疲劳的影响。结果发现赛场噪声不仅加剧大强度运动时心血管的反应,而且诱发及加剧中枢神经机能下降,引起内分泌激素调节失调,从而加快疲劳的产生。  相似文献   

骨骼肌--调节运动中机体代谢的内分泌器官研究的进展   总被引：1，自引：0，他引：1  

李良刚  袁支润  王德恭 《成都体育学院学报》2005,31(6):46-50

介绍了运动中骨骼肌分泌细胞因子白介素-6(Interleukin-6, IL-6)的最新研究成果:骨骼肌不是单一的收缩器官,而且还是一个内分泌器官.在运动中骨骼肌能够分泌大量的白介素-6.局部收缩肌细胞分泌量比安静时高出近1000倍;血浆白介素-6浓度比安静时高出近100倍.  相似文献   

不同负荷的运动训练对大鼠血浆ADM、ET含量变化的影响及意义   总被引：7，自引：0，他引：7  

赵峰  李建平 《北京体育大学学报》2005,28(5):631-633

为了探讨不同负荷运动训练对机体心血管系统内分泌功能的影响,以大鼠为运动模型进行为期8周不同负荷的运动训练,测定其血浆肾上腺髓质素(ADM)、内皮素(ET)含量.结果表明:1)长期中等负荷的运动训练后血浆ET、ADM含量增加且呈正相关;2)长期大负荷的运动训练会导致机体血浆ET含量显著增高,ADM含量显著下降.结论:长期中等负荷的运动训练可促进ET、ADM分泌适度增加,对机体产生有益的影响;长期大负荷运动训练可导致两种血管活性肽的分泌失衡,对健康不利.  相似文献