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31.
32.
沈楠 《中国体育(中英文版)》2004,(8)
水上项目:三军出击 奥运会水上项目拥有41枚金牌,而中国运动员至今与之无缘。中国皮划艇队经过八年的卧薪尝胆,已经具备向欧美传统强队叫板的实力,也责无旁贷地担当起了中国水军的冲金“先锋”。其中,男子双人划艇、女子双人皮艇和四人皮艇有希望实现突破。不过今年以来,国际上皮划艇项目的竞争十分激烈,前六名的差距一般在1秒以内,因此其结果存在很大变数。此外,奥运经验的缺乏以及时差、气候、场地等客观因素也给中国队员的冲冠之路蒙上了一层薄雾。 中国赛艇队在悉尼奥运会上惨败,此次虽雄心勃勃,却在争夺奥运席位的过程中遭遇“寒流”… 相似文献
33.
Copper accumulation and intracellular distribution in Elsholtzia splendens, a native Chinese Cu-tolerant and accumulating plant species, was investigated by transmission electron microscope (TEM) and gradient centrifugation techniques.Copper concentrations in roots, stems and leaves of E. splendens increased with increasing Cu levels in solution. After exposure to 500 μmol/L Cu for 8 d, about 1000 mg/kg Cu were accumulated in the stem and 250 mg/kg Cu in the leaf of E. splendens. At 50μmol/L Cu, no significant toxicity was observed in the chloroplast and mitochondrion within its leaf cells, but separation appeared at the cytoplasm and the cell wall within the root cells. At ＞250 μmol/L Cu, both root and leaf organelles in E. splendens were damaged heavily by excessive Cu in vivo. Copper subcellular localization in the plant leaf after 8 days' exposure to 500 μmol/L Cu using gradient centrifugation techniques was found to be decreased in the order: chloroplast＞cell wall＞soluble fraction＞other organelles. The plant root cell wall was found to be the site of highest Cu localization. Increase of Cu exposure time from 8 d to 16d, increased slightly Cu concentration in cell wall fraction in roots and leaves, while that in the chloroplast fraction decreased in leaves of the plants grown in both 0.25 μmol/L and 500 μmol/L Cu. TEM confirmed that much more Cu localized in cell walls of E. splendens roots and leaves, but also more Cu localized in E. splendens' chloroplast when the plant is exposed to Cu levels＞250μmol/L, as compared to those in the plant grown in 0.25 μmol/L Cu. Copper treatment at levels＞250 μmol/L caused pronounced damage in the leaf chloroplast and root organelles. Copper localization in cell walls and chloroplasts could mainly account for the high detoxification of Cu in E. splendens. 相似文献
34.
OBJECTIVE: The aim of this study is to identify the distinct developmental experiences associated with child sexual abuse and rape. METHOD: For 269 sexual offenders (137 rapists and 132 child sexual abusers), developmental experiences were recorded from a behavioral checklist, a parental-bonding survey, and a sexual history questionnaire. Offender classification was obtained from official records and verified through polygraph examinations. RESULTS: Compared to rapists, child sexual abusers reported more frequent experiences of child sexual abuse (73%), early exposure to pornography (65% before age 10), an earlier onset of masturbation (60% before age 11), and sexual activities with animals (38%). In contrast to child sexual abusers, rapists reported more frequent experiences of physical abuse (68%), parental violence (78%), emotional abuse (70%), and cruelty to animals (68%). Both child sexual abusers and rapists (>93%) reported frequent exposure to violent media during their childhood. Most offenders (94%) described having insecure parental attachment bonds; 76% of rapists reported avoidant parental attachments and 62% of child sexual abusers reported anxious parental attachments. CONCLUSIONS: Findings from this study support the role of specific developmental experiences as etiological factors in differential sexual offending. Child sexual abusers' developmental histories were characterized by heightened sexuality; whereas rapists' childhood histories were more indicative of violence. These findings have implications for the treatment of sexual abusers and the prevention of sexual abuse. PRACTICE IMPLICATIONS: This study's findings suggest that sexual offenders have been socialized to satisfy human needs of intimacy and sexuality through maladaptive means, which implies that a risk management approach may not be sufficient treatment. Although risk models teach offenders skills to avoid high-risk situations, they fail to address the maladaptive strategies that they may have developed for satisfying needs. Instead, the focus of treatment should be to equip offenders with the knowledge, skills, and opportunities to achieve these needs in an acceptable manner. Thus, this model will provide these individuals with the opportunity to live a healthy life without sexual offending. 相似文献
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37.
Eldredge JD Morley SK Hendrix IC Carr RD Bengtson J 《Medical reference services quarterly》2012,31(1):34-44
Every major health profession now provides competency statements for preparing new members for their respective professions. These competency statements normally include expectations for training health professions students in library/informatics skills. For purposes of this article, searches were conducted using various sources to produce a comprehensive 32-page Compendium that inventories library/informatics-related competency statements. This compendium should aid readers in integrating their library/informatics skills training into various health professions education curricula. 相似文献
38.
OBJECTIVES: To examine the relationship between sexual abuse and academic achievement in an adolescent inpatient psychiatric population. Individual factors expected to influence this relationship were measured to explore the way they each interacted with sexual abuse and its relationship to academic achievement. METHOD: Eighty-one adolescent psychiatric inpatients participated in the study (aged 12--18 years: M=16.0). Participants were administered tests of academic achievement (dependent variable) and intelligence, and completed a number of self-report measures of their experience of different types of maltreatment, their perception of the parenting they received, socio-economic status, substance abuse, and psychopathology. RESULTS: Hierarchical regression analysis revealed that intelligence was the main predictor of academic achievement (uniquely explaining 26% of the variance). A number of interaction effects were also significant indicating that intelligence, substance abuse, internalizing behavior problems, externalizing behavior problems all influenced the relationship between sexual abuse and academic achievement. DISCUSSION: Examining the impact of sexual abuse is complex because it is typically an experience embedded in a range of other risk factors, such as poverty, family dysfunction, and other types of maltreatment. This study demonstrated coexistence between sexual abuse and a number of other variables, including other maltreatment types and parental overprotection, underscoring the requirement for complex models of research that more accurately reflect the experience of abused children. 相似文献
40.