排序方式： 共有6条查询结果，搜索用时 421 毫秒
1
1.
Social network analysis was used to examine the role of having a mutual biracial friend on cross-race friendship nominations among monoracial sixth-grade students (Mage = 10.56 years) in two racially diverse middle schools (n = 385; n = 351). Monoracial youth were most likely to choose same-race peers as friends but more likely to choose biracial than different-race peers as friends, suggesting that racial homophily may operate in an incremental way to influence friendships. Monoracial different-race youth were also more likely to be friends if they had a mutual biracial friend. The findings shed light on the unique role that biracial youth play in diverse friendship networks. Implications for including biracial youth in studies of cross-race friendship are discussed. 相似文献
2.
Children's confidence in their own knowledge may influence their willingness to learn novel information from others. Twenty-four-month-old children's (N = 160) willingness to learn novel labels for either familiar or novel objects from an adult speaker was tested in 1 of 5 conditions: accurate, inaccurate, knowledgeable, ignorant, or uninformative. Children were willing to learn a second label for an object from a reliable informant in the accurate, knowledgeable, and uninformative conditions; children were less willing to apply a novel label to a familiar object if the speaker previously was inaccurate or had expressed ignorance. However, when the objects were novel, children were willing to learn the label regardless of the speaker's knowledge level. 相似文献
3.
CH. V. Ramana Devi M. P. J. S. Anandaraj 《Indian journal of clinical biochemistry : IJCB》1994,9(1):21-23
The enhanced presence of calcium in the erythrocytes of thalassemia homozygotes along with an increase in cytosolic and membrane
bound CANP, and a decrease in membrane glycoprotein and total membrane sulfhydryl groups are statistically significant changes.In vitro loading of erythrocytes with calcium in the presence of lonophore A23187 caused similar changes pointing to the significance of calcium mediated proteolysis, especially by CANP in preparing erythrocytes
for the phagocytic event. 相似文献
4.
5.
采用正交试验L9（3^4）,对加热回流提取和超声提取优化广东紫珠总黄酮的提取工艺进行了比较研究.以提取物中总黄酮得率为评价指标,利用紫外分光光度法测定黄酮的含量.结果表明,加热回流提取的最佳工艺条件为A1 B3 C2,即乙醇浓度为60％、水浴温度为80℃、提取时间为2 h;超声法为A2 B1 C2,即乙醇浓度为70％、固液比为1：20、超声40 min.芦丁对照品9.4～75.2μg·mL^1范围内与吸光度呈良好的线性关系.加热回流提取法优于超声法,黄酮提取率达到9.27％. 相似文献
6.
Needs of learning disabled adults 总被引：2，自引：0，他引：2
1