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1.
新陈代谢是生物生命活动的基本特征,包括物质代谢和能量代谢两方面.对于绿色植物而言,新陈代谢主要包括光合作用和呼吸作用.绿色植物的光合作用与呼吸作用不仅是高中生物教学的重点与难点,而且也是历年生物高考出题的重点.本文就高中生物光合作用与呼吸作用中气体代谢特点和代谢相对强度的表示方式作专题分析. 相似文献
2.
机体稳定的铁状态是维持生命活动的基本要素.诸多因素影响机体铁代谢,包括：饮食、低氧、运动等,其中低氧对机体铁代谢的影响备受关注.在机体铁代谢这个严密的调节系统中,关键调节因子Hepcidin在低氧影响机体铁稳态中起到了桥梁作用.低氧状态下Hepcidin调节铁代谢的分子机制成为近年来研究的热点.研究发现,低氧诱导因子（hypoxia inducible factor,HIF）/低氧反应元件（hypoxia response element,HRE）系统发挥着重要的作用,同时发现肥胖引起的局部低氧会导致铁代谢的紊乱,与低氧引发的炎症导致Hepcidin水平异常有关.另外发现低氧训练引起机体内氧浓度的变化会通过Hepcidin引起机体铁代谢适应性交化. 相似文献
3.
镁对猪的作用机理及应用研究 总被引：1，自引：0，他引：1
矿物质元素镁是动物细胞内的主要阳离子,是生物体正常生命活动及代谢过程中许多酶系的辅助因子及骨骼的组成成分,在机体内镁对细胞的多种生物化学功能及营养物质的代谢具有重要的影响作用.本文主要对猪日粮中镁的来源、代谢、生物化学功能及其在生产中应用进行了综述. 相似文献
4.
蛋白质代谢是畜产品的形成过程及机体维持正常免疫系统功能的物质基础.免疫激活改变蛋白质代谢平衡,导致动物生长受抑.本文阐述了免疫激活后肝脏、骨骼肌、免疫器官蛋白质代谢的变化及细胞因子、激素对此过程的调节机理,以期表明在生产中保持机体较高的免疫状态对动物健康、生长的意义. 相似文献
5.
《代谢调控》是我院将《代谢工程》和《代谢控制发酵》两门课程整合,为生物技术专业开设的一门理论性较强的专业课.为了加强应用型人才的培养,我们探索了《代谢调控》课程的实践教学模式.分别在课堂与生产实习基地引导学生就一些真实的生产案例展开分析讨论,阐述其中运用的代谢调控基础知识,极大提高了学生理论联系实际的能力,激发了学生的学习热情. 相似文献
6.
矿物质元素镁是动物细胞内的主要阳离子,是生物体正常生命活动及代谢过程中许多酶系的辅助因子及骨骼的组成成分,在机体内镁对细胞的多种生物化学功能及营养物质的代谢具有重要的影响作用.本文主要对猪日粮中镁的来源、代谢、生物化学功能及其在生产中应用进行了综述. 相似文献
7.
说起"代谢综合征"这个医学专用名词,相信不少读者会觉得它很陌生.但要是换种说法--代谢综合征是肥胖、糖尿病、血脂异常、高血压等多种代谢疾病在体内集结的一种状态,大家就应该比较理解了吧. 相似文献
8.
1,25-（OH）2D3是维生素D3经肝、肾代谢后的主要活性形式,其生物学效应是由VDR介导的.1,25-（OH）2D3与VDR结合被活化后,参与维持体内矿物质动态平衡、钙及磷酸根代谢、骨代谢、调节多种组织细胞的生长分化,并具有免疫调节、抑制肿瘤、抗炎等作用. 相似文献
9.
胡有志 《廊坊师范学院学报》1999,(4)
运动生物化学是生物化学的一个分支,是研究运动对机体化学组成的影响和物质代谢的特点及规律的一门科学,是生物化学在体育科学中的应用.本文拟介绍运动生物化学的主要研究成果,以便为体育科学训练服务.1.运动时能量供应过程及其代谢特点运动时能量供应过程及其代谢特点是第一、二、三届国际运动生物化学报告会讨论的主要议题,肌肉中ATP.CP在运动时供能输出的功率最大,但其在肌肉贮量少,故只能在短时间表 相似文献
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分析了amylalcohol的辞源,指出了amylalcohol并不等同于pentylalcohol,因为amylalcohol是一种醇类混合物,而不是一种纯净物．将amylalcohol认为是pentylalcohol的同义词,其实这完全是一种误解;并给出了纠正误解,正确表示的方法． 相似文献
12.
E. K. Erevik T. Torsheim Ø. Vedaa C. S. Andreassen S. Pallesen 《Scandinavian Journal of Educational Research》2018,62(6):900-910
This article aims to investigate drinking patterns among business students, and dispositional (e.g., demographics) and social factors (e.g., norms of alcohol use) that may explain differences in alcohol consumption between business and non-business students. Students in Bergen, Norway, were invited to participate in a survey. The sample consisted of 11,236 students. Binary logistic regressions were run to examine the relationship between institutional affiliation and alcohol use when controlling for covariates associated with alcohol use. Business students had higher alcohol consumption than other students, and shared several dispositional and social factors known to predict alcohol use. The heightened alcohol use among business students can partly be explained by dispositional factors, but seems mostly related to social norms and attitudes. 相似文献
13.
This study examined drinking motives, alcohol use, and alcohol‐related problems among White college athletes and college athletes of color (N = 113). Results indicated no differences in drinking motives between the 2 groups. White athletes reported higher levels of alcohol use, whereas athletes of color reported higher levels of alcohol‐related problems. Athletes of color with high levels of coping and conformity motives reported the highest level of alcohol‐related problems. 相似文献
14.
Victor E. Tuazon Sterling P. Travis Eleni M. Honderich Amy E. Williams Sarah E. I. Menefee Charles F. Gressard 《Journal of College Counseling》2019,22(1):13-26
The construct of drunkorexia, caloric restriction prior to or during alcohol consumption, was examined in 411 college students who experienced alcohol‐related infractions. Analyses were conducted to examine differences in demographic prevalence distributions, alcohol‐related consequences, and alcohol consumption between a subsample of participants who reported drunkorexia behaviors and a subsample who did not. 相似文献
15.
Reasons for Utilizing Mental Health Services as Predictors of College Students’ Alcohol Risk 
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下载免费PDF全文 Shannon R. Kenney Lucy E. Napper Joseph W. LaBrie Paige Vaughn 《Journal of College Counseling》2018,21(2):125-138
The authors examined college student drinkers’ (n = 153) reasons for seeking counseling services and risk for alcohol problems. Students seeking help for impulse‐ or anger‐related issues and depression were at heightened risk for alcohol problems. Only 10% of students sought alcohol‐related help despite high rates of hazardous alcohol use (80%) and dependence (39%). Targeted screening and intervention in college counseling centers may enable providers to effectively identify and treat students in need of alcohol treatment. 相似文献
16.
ObjectivesChildhood maltreatment (CM) and cognitive emotion regulation strategies (CERSs) may be important in alcohol craving and dependence in alcohol-dependent individuals. The aim of this study was to evaluate direct effects of CM on the subscales of alcohol craving and alcohol dependence and its indirect effects via CERSs in individuals with a diagnosis of alcohol dependence.MethodsIn a cross-sectional design, 329 alcohol-dependent males completed the Childhood Trauma Questionnaire-Short Form (CTQ-SF), the Cognitive Emotion Regulation Questionnaire-Short version (CERQ-Short), the Alcohol Dependence Scale (ADS), the Obsessive Compulsive Drinking Scale (OCDS), and the Beck Depression Inventory-II (BDI-II).ResultsParticipants with alcohol dependence had early age of onset of alcohol use (mean = 20.78 years), relatively long duration of alcohol use (mean = 11.14 years), and low education (mean = 9.55 years). Indirect effects were observed from CM to the subscales of alcohol craving and dependence only through maladaptive CERSs after adjusting for demographic and clinical factors. No direct effect was observed through CM on the subscales of alcohol craving and dependence.ConclusionsAlthough drawing causal conclusions from the current research is impossible, the findings suggest that maladaptive CERSs may be a possible mechanism relating CM to alcohol craving and dependence in treatment-seeking alcohol-dependent individuals, while adaptive CERSs may be less important regarding this relation. However, the findings of the current study need longitudinal research. 相似文献
17.
应用电生理方法观察了不同浓度的酒精对蟾蜍离体坐骨神经干动作电位的幅度、持续时间及传导速度的影响。结果表明：用酒精溶液浸泡蟾蜍坐骨神经干10min，低浓度（1％、2％、4％）时，动作电位的幅度和对照组相比无明显变化；中、高浓度的酒精溶液（6％、8％、10％、129／6）使动作电位的幅度显著或极显著降低。动作电位的传导速度随着酒精溶液浓度的升高而变慢，和对照组相比，10％的酒精溶液使其显著减慢（P〈0．05）；12％的酒精溶液使其极显著减慢（P〈0．01）。随着酒精溶液浓度的升高，坐骨神经干动作电位持续时间有缩短趋势，但无显著性差异。这说明酒精溶液对坐骨神经干动作电位具有一定的抑制作用。 相似文献
18.
体内酒精浓度与酒后时间、喝酒持续时间的关系研究 总被引：1，自引：0，他引：1
生活中因醉酒驾车出现的事故屡见不鲜,对社会造成很大危害.醉酒的程度主要取决于人体内的酒精浓度,所以对随时间变化人体体内的酒精浓度的变化情况进行了研究.最小二乘法对离散数据处理具有误差较小、方便实用的优点,可对连续性问题过程进行离散化的数值计算.针对驾驶员饮酒后体内酒精含量与时间变化之间的关系,及饮酒后多长时间人体体内酒精浓度达到最高值进行研究. 相似文献
19.
聚乙烯醇对菘蓝组培苗玻璃化现象发生的影响 总被引：4，自引：0，他引：4
以菘蓝为材料,研究了在培养基中添加不同浓度聚乙烯醇对菘蓝组培苗玻璃化现象的发生影响。结果表明,随聚乙烯醇浓度的升高,组培苗玻璃化率降低,但浓度过高会抑制组培苗的生长,对叶片的分化抑制作用也较大。此外试验还发现适宜浓度的聚乙烯醇(1.5g/L)可起到促进组培苗生根的效果。 相似文献
20.
Kenneth A. Kavale Belinda D. Karge 《International Journal of Disability, Development & Education》1986,33(1):4-16
The Fetal Alcohol Syndrome represents a pattern of physical malformations observed in offspring of women who consume alcohol during pregnancy. Besides physical defects associated with in uteroexposure to alcohol, serious cognitive deficiencies, mental retardation in particular, are now recognized as the most serious consequence of alcohol consumption during prenatal development. The purpose of the present review is to examine the literature that bears upon the behaviorally teratogenic aspects of alcohol; specifically, research focusing on the following issues is synthesized: a) prevalence of alcohol abuse among women, b) acute and chronic effects of alcohol on the fetus, c) genetic susceptibility, d) neuropathology, e) correlative conditions, and f) animal studies. Implications for the field of special education are considered throughout the review. 相似文献