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对广州市小学自然植物教育进行访问调查,对小学高年级儿童进行植物教育途径、对自然教育课程态度和自然植物教育形式、喜好等方面的问卷调查,主要从自然植物教育模式、小学高年级儿童自然植物教育需求等方面进行分析,得到自然植物教育的整体普及度不高、学校对自然教学资源的挖掘和利用不充分、校内植物教学实践活动少、活动形式与儿童的喜好不符的问题,提出了加强学校与公园和机构的交流合作,优化植物教育资源的利用,针对特定需求改善校内植物教育内容和形式,加强老师在适龄自然教育上的专业培训以及自然体验活动灵活化的建议。 相似文献
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本分析了高等农业教育国际化的背景,以及与农业国际化的关系,探讨了面向世界农业的通用人才的接头及其知识和能力结构,提出了高等农业教育国际化的制度、环境建设有关的发展趋势。 相似文献
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胡振兴 《湖南农业大学学报(自然科学版)》2016,(4):37-43
选取2013~2014年发生高管腐败的49家上市公司作为相关样本和未发生高管腐败的49家上市公司作为配对样本,运用二元逻辑回归模型和多元线性回归模型进行实证研究后发现:高管腐败对经营业绩有显著危害。CEO权力强度、股权分散性、股权流动性与高管腐败显著正相关,股权制衡度与高管腐败显著负相关,董事会规模、独立董事占比与高管腐败低度正相关,股权集中度、监事会规模、CEO相对薪酬与高管腐败低度负相关。 相似文献
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Marla Lichtenberger DVM DACVECC ; Connie Orcutt DVM DABVP ; Carolyn Cray PhD ; Douglas H. Thamm VMD DACVIM ; Daniel DeBehnke MD FACEP ; Cheryl Page BSC CVT ; Lori Mull BSc CVT Rebecca Kirby DVM DACVIM DACVECC 《Journal of Veterinary Emergency and Critical Care》2009,19(5):467-472
Objective – The purpose of this study was to determine the LD50 for acute blood loss in mallard ducks ( Anas platyrhynchos ), compare the mortality rate among 3 fluid resuscitation groups, and determine the time required for a regenerative RBC response.
Design – Prospective study.
Setting – Medical College of Wisconsin Research facility.
Animals – Eighteen mallard ducks were included for the LD50 study and 28 for the fluid resuscitation study.
Interventions – Phlebotomy was performed during both the LD50 and fluid resuscitation studies. Ducks in the fluid resuscitation study received a 5 mL/kg intravenous bolus of crystalloids, hetastarch (HES), or a hemoglobin-based oxygen-carrying solution (HBOCS).
Measurements and Main Results – The LD50 for acute blood loss was 60% of total blood volume. This blood volume was removed in the fluid resuscitation study to create a model of acute blood loss. Following fluid administration, 6 birds in the crystalloid group (66%), 4 birds in the HES group (40%), and 2 birds in the HBOCS group (20%) died. No statistical difference in mortality rate was seen among the 3 fluid resuscitation groups. Relative polychromasia evaluated post-phlebotomy demonstrated regeneration starting at 24 hours and continuing through 48 hours.
Conclusions – The LD50 for acute blood loss in mallard ducks was 60% of their total blood volume. Although no statistical difference in mortality rate was appreciated among the 3 fluid resuscitation groups, a trend of decreased mortality rate was observed in the HBOCS group. An early regenerative response was apparent following acute blood loss. 相似文献
Design – Prospective study.
Setting – Medical College of Wisconsin Research facility.
Animals – Eighteen mallard ducks were included for the LD
Interventions – Phlebotomy was performed during both the LD
Measurements and Main Results – The LD
Conclusions – The LD
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本文分析了老龄人的生理、心理的需求,根据老年人的行为特征,指出现代居住区老年人户外空间的人性化设计要点。 相似文献
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本文分析了重庆市麦类生产现状和存在的主要问题,并对生产前景进行了预测,提出了实现预测指标的对策和主要措施。 相似文献