全文获取类型
收费全文 | 121篇 |
免费 | 1篇 |
国内免费 | 2篇 |
专业分类
教育 | 65篇 |
科学研究 | 10篇 |
体育 | 32篇 |
综合类 | 12篇 |
文化理论 | 1篇 |
信息传播 | 4篇 |
出版年
2021年 | 2篇 |
2020年 | 3篇 |
2019年 | 13篇 |
2018年 | 1篇 |
2017年 | 2篇 |
2016年 | 3篇 |
2015年 | 2篇 |
2014年 | 6篇 |
2013年 | 18篇 |
2012年 | 9篇 |
2011年 | 6篇 |
2010年 | 5篇 |
2009年 | 5篇 |
2008年 | 8篇 |
2007年 | 5篇 |
2006年 | 6篇 |
2005年 | 5篇 |
2004年 | 4篇 |
2003年 | 3篇 |
2002年 | 5篇 |
2001年 | 3篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1994年 | 4篇 |
1982年 | 1篇 |
排序方式: 共有124条查询结果,搜索用时 15 毫秒
1.
Kirsty Jayne Elliott-Sale Ashley Graham Stephanie Jane Hanley Sherry Blumenthal Craig Sale 《European Journal of Sport Science》2019,19(1):62-70
AbstractMaternal dietary habits influence maternal and foetal health, representing a pathway for intervention to maximise pregnancy outcomes. Advice on energy intake is provided on a trimester basis, with no additional calories required in the first trimester and an additional 340?kcal?d?1 and 452?kcal?d?1 needed for the second and third trimesters. Energy intake depends on pre-gravid body mass index (BMI); underweight women are recommended an increase of 150, 200 and 300?kcal?d?1 during the first, second and third trimester, normal weight women an increase of 0, 350 and 500?kcal?d?1 and obese women an increase of 0, 450 and 350?kcal?day?1. The recommendations for carbohydrate and protein intake are 175?g?d?1 and 0.88–1.1?g?kgBM?d?1, with no change to fat intake. The number of pre-gravid obese women is rising; therefore, we need to regulate weight in women of childbearing age and limit gestational weight gain to within the recommended ranges [overweight women 6.8–11.3?kg and obese women 5.0–9.1?kg]. This can be achieved using nutritional interventions, as dietary changes have been shown to help with gestational weight management. As pregnancy has been identified as a risk factor for the development of obesity, normal weight women should gain 11.5–16.0?kg during pregnancy. While some research has shown that dietary interventions help to regulate gestational weight gain and promote postpartum weight loss to some extent, future research is needed to provide safe and effective guidelines to maximise these effects, while benefitting maternal and foetal health. 相似文献
2.
3.
刘浩宇 《北京城市学院学报》2001,(4):128-129
文章具体论述了食品营养与检测专业的实习情况,阐明实习这一重要教学环节对于学科建设、专业方向调整以及对学生的思想教育起到积极的作用. 相似文献
5.
讨论了基于营养动力学的捕食.食饵模型的最优控制,得到了使资源管理者获得最大利润并使种群系统持续下去的最优控制率. 相似文献
6.
周彦兵 《深圳信息职业技术学院学报》1996,(1)
对番红花植株不同施磷水平的试验结果表明:不同磷水平时番红花植株N、P、K、Mg、Mn、Fe等矿质元素的吸收运转均有显著影响;低磷不利于番红花植株矿质元素地上部向地下部的运转,造成番红花新球茎矿质元素含量普遍偏低;随着施磷水平的降低,蛋白氮含量明显减少,蛋白质合成受阻,核酸及糖分减少,因而新球茎品质不高。 相似文献
7.
Danielle M. Logue Sharon M. Madigan Mirjam Heinen Sarah-Jane McDonnell Eamonn Delahunt Clare A. Corish 《European Journal of Sport Science》2019,19(1):112-122
ABSTRACTIntroduction: Low energy availability (LEA) results in physiological adaptations, which can contribute to unfavourable health outcomes. Little information exists on risk of LEA in active individuals competing in different sports or levels of competition. The aims of this study were to (1) identify risk of LEA in females competing at different levels of competition and (2) investigate associations between risk of LEA, illness and dietary habits. Methods: The validated questionnaire, ‘Low Energy Availability in Females Questionnaire’ was distributed online (November 2016–February 2017) to assess risk of LEA. Twenty-nine additional questions collected information on demographics, illness history and dietary habits. Participants were considered at risk of LEA if they attained a score of?≥?8 and were grouped into: (i) international; (ii) provincial/inter-county; (iii) competitive; and (iv) recreationally active. Chi-square and logistic regression analyses were used to explore differences between those at risk or not at risk of LEA. Results: Risk of LEA was identified in 40% (n?=?331) of 833 participants and was 1.7 and 1.8 times more likely in international and provincial/inter-county athletes compared to those who were recreationally active (International: odds ratios (OR) 1.68, 95% confidence intervals (95%CI) 1.12–2.54; Provincial/inter-county: OR 1.83, 95%CI 1.20–2.77). In participants at risk of LEA, missing >22 days of training during the previous year due to illness occurred 3 times more frequently (OR 3.01, 95%CI 1.81–5.02). Conclusion: Risk of LEA was widespread in this heterogeneous sample. Awareness of LEA and the development of appropriate energy management strategies to ensure athlete health across levels of competition are required. 相似文献
8.
9.
对近年国内公开发表的赛艇队员生化指标研究的论文进行综述。结果发现:目前对赛艇队员血色素、尿素氮、肌酸激酶、血乳酸等生化指标研究已有较多科研成果,对免疫和内分泌系统,以及运动员选材、运动营养等方面综合考虑的生化指标研究也有更多地关注和研究。 相似文献
10.
In Western societies scientists are increasingly expected to seek media exposure and cooperate with industry. Little attention
has been given to the way such expectations affect the role of scientific experts in society. To investigate scientists’ own
perspectives on these issues eight exploratory, in-depth interviews were conducted in Denmark with reputable nutrition scientists.
Additionally, eight interviews were held with ‘key informants’ from the field of nutrition policy. It was found that nutrition
scientists experience two dilemmas: first, between their aspiration to make a collective impact on public health and the powerful
incentives of each to appear frequently in the media with new messages; second, between their need to cooperate with the food
industry for financial reasons and their fear that this may compromise their independence and scientific integrity. It is
argued that the dilemmas identified in this study should be dealt with openly by the relevant groups of scientists. 相似文献