In order to select the best method to extract DNA from faeces of gray squirrel(Sciurus vulgaris),the PCR was used to detect sex determining region of the Y gene(SRY) so as to determine the sex ratio of the animals in the region of Sun Island.
采用已优化的硫氰酸胍-硅藻土法提取乙醇保存的灰松鼠粪便DNA,PCR检测sry基因,从而确定灰松鼠的性别比例。
In natural populations of dioecious plants, the sex ratio is usually 1 1, but the ratio varies with the changes in water supply, nutrient availability, light intensity, temperature, CO2 concentration and disturbance level.
雌雄异株植物是陆地生态系统的重要组分,自然种群中其雌雄个体的性别比例通常为1∶1,但随水分、养分、CO2浓度、温度、光照和干扰水平等的不同而有所不同。
Yet the sex ratio of birth population is constantly rising,which causes some serious social problems in China.
自上世纪80年初实行计划生育政策进行人口控制后,我国人口总量虽然得到了控制,但是出生人口性别比例却持续上升,这将带来严重的社会问题。
Birth sex ratios and altitude - related four footsteps in China;
我国出生性别比例与海拔相关的四个台阶
The experiment was carried out to study the effects of different sera on the water buffalo preimplantation embryo s sex ratio.
研究了不同血清对水牛早期胚胎性别比率的影响。
Newborn s weight and sex ration in Weihai city of shandong province.;
2004年威海市新生儿出生体重与性别比分析
Systematic Analysis of Causes for the High Sex Ratio at Birth;
出生婴儿性别比偏高原因的系统分析
This paper indicated the serious misadjusted situation of sex ratio in China,and analyzed the reason.
指出了我国性别比失调的严重现状,分析提出了传统生育观念和对生育行为管理上的漏洞是其产生的原因,阐述了我国目前用法律手段调整性别比的现行规定和发展历程,探讨目前存在的问题并提出了相应建议。
Skewed sex ratios raised the competition.
倾斜的性别比例引发了竞争。
The results show that:the sex ratio of male to female visitors(2.1:1)is higher than the national average of 1.27:1;
结果表明:男、女游客的比例(2．1:1)高于全国平均出游性别比例1．27:1;
Perspective on sex ratio imbalance of the science and technology enterprise;
我国科技事业中性别比例失衡问题透析
Reflection on Cultural Anthropology of Sex Imbalance of Chinese Population;
中国人口性别比例失调的文化人类学思考
Birth sex ratios and altitude - related four footsteps in China;
我国出生性别比例与海拔相关的四个台阶
An Analysis of the Cause of the Larger Male Population in Wenzhou;
温州市人口性别比例偏高及其成因分析
Study on the Effect of Insemination Condition on the Dairy Cow Sex Ratio and the Conception Rate;
授精环境对奶牛性别比例和受胎率的影响的试验研究
Study on Foraging Betavior and Sex Proportion of Squirrel(Sciurus Vulgaris) in Sun Island;
太阳岛风景区松鼠采食行为观察和种群性别比例的初步研究
The Research on the Imbalanced Gender Ratio at Birth in Hunan Province;
湖南省出生人口性别比例失衡的现状及对策研究
Gerder,Quota Policy And Women s Involvement--A Case Study Of The Election Of Villages Committee In Chuan Village Of Tianjin City;
社会性别、比例政策与女性参与——以天津川村村委会选举为例
These problems include the high sex ratio and the growing population aging.
例如出生人口性别比偏高、人口老龄化等。
Proportional Representation:Choices in Contemporary Gender Equality in Political Participation in China
比例制:当代中国性别平等参政的效力抉择
Women use social networking sites more than men, 56 per cent compared to 46 per cent.
女性比男性更爱进行在线社交，二者的比例分别为56%和46%。
Percentages of the Water Quality Grades of the Pearl River System
珠江水系水质类别比例
Percentages of the Water Quality Grades of the Hai River System
海河水系水质类别比例
Percentage of the Water Quality Grades of the Yangtze River System
长江水系水质类别比例
Percentage of the Water Quality of the Yellow River System
黄河水系水质类别比例
Percentage of Water Quality Grades in Liao River System
辽河水系水质类别比例