重铸:第二语言教学和学习中的有效反馈

该文阐明了重铸的概念、性质、在语言习得中的作用以及与之相关的理论研究背景,并从重铸与接纳的关系、学习者个人因素、语境、目标语的选择、不同类型的重铸等方面分析了重铸在第二语言学习中有效性的影响因素,最后探讨了重铸对我国二语教学和学习的启发和意义。     

浅析福州地区常见花卉花期的调控

综述了福州地区常见花卉花期调控所采用的技术方法：光照处理、温度控制、水肥控制、调整播种期和扦插期等使花卉花期在预定时间内开放。     

兰旗榆——一个在干旱草原区很有发展潜力的造林树种

兰旗榆为白榆的一个地理生态变种,在锡盟浑善达克沙地及其南缘的镶黄旗、正镶白旗、正兰旗等地区生长表现突出。该树种较之其它的白榆品种具有抗旱、抗寒、抗风沙,物候期早,所需积温低以及生长迅速等优良特性,对我区北部干旱草原气候生态条件适应能力强,在草原造林中有着其它树种不可替代的地位和作用,建议大力推广。     

Prevention and treatment of restenosis after PTA operation in rabbit artery by 3,3-diindolylmethane

AIM: To evaluate the safety and efficacy of 3,3-diindolylmethane (DIM) on neointimal proliferation of rabbit artery after balloon angioplasty. METHODS: Restenosis models of carotid artery after balloon injury was established in rabbits. 30 rabbits were randomly divided into 4 groups: sham-operated group, model group, low-dose DIM group and high-dose DIM group. DIM was given to the rabbits in low-dose treatment group (2 mg·kg-1·d-1) and high-dose treatment group (8 mg·kg-1·d-1) once a day from 3 d before operation to 4 weeks after operation. The two treatment groups were administered with intraperitoneal injection of emulsified DIM, while the other two groups with saline at the same volume. All rabbits were killed after 28 d and carotid arteries were removed. With HE staining, automatic image analysis and immunohistochemistry, artery morphology was observed and the thickness of arterial intima and media was measured. Platelet derived growth factor (PDGF) and transfer growth factor β1 (TGF-β1) were examined. The expression of 〖STBX〗bcl-2〖STBZ〗 gene was detected by in situ hybridization (ISH) with computer-assisted picture analysis system. RESULTS: No significant difference was found between low-dose DIM group and model group in intimal thickness, media thickness, luminal area and the expression of PDGF and TGF-β1 in low-dose DIM group (P>0.05). The intimal thickness was decreased in high-dose DIM group compared with model group and low-dose DIM group (P<0.01). The luminal area was significantly larger in high-dose DIM group than that in model group and low-dose DIM group (P<0.01). The expression of PDGF and TGF-β1 in low-dose DIM group was significantly reduced compared with model group and low-dose DIM group (P<0.01). CONCLUSION: The inhibition and treatment of DIM on arterial restenosis are safe and effective. The effect might be achieved by preventing neointimal proliferation and the expression of PDGF and TGF, enhancing apoptosis in the vascular smooth muscle cells.     

基于支持向量机的绿地径流系数预测模型的建立

以绿地为下垫面,分析了覆盖度等因素对径流系数的影响。结果表明:覆盖度低于80%时,草地的下渗能力较小,高于80%时显著增强,径流系数与覆盖度成非线性关系。为了准确预测绿地的产流量,根据多种影响因素与径流系数构成的多维非线性关系,提出采用-ε支持向量回归机建立绿地径流系数的预测模型,与LM-BP神经网络预测模型进行了比较。结果证明:-ε支持向量回归机建立的径流系数预测模型具有泛化能力强和预测精度高的特点,为城区绿地产流量的预测提供了新的计算方法。     

天达2116植物细胞膜稳态剂在蔬菜和果树上的推广应用

天达2116植物细胞膜稳态剂是山东天达生物制药股份有限公司与山东大学生命科学院共同研制开发的一种高效多功能的高科技植保产品,具有肥药双功能。浙江省嘉兴市秀洲区新塍镇从2004年在葡萄、瓜果、蔬菜等经济作物上推广以来,三年累计使用面积17470亩,其中2006年推广1.09万亩,增加产值     

锌对几种淋巴类细胞生长和功能影响的研究

本文研究比较了锌和螯合剂ＥＤＴＡ对淋巴类细胞株ＰＤｃ－Ｂ－１、Ｊｕｒｋａｔ、ＢｏＬｃＬ、６Ｃ９和奶牛ＰＢＭＣ增殖及功能的影响。除奶牛ＰＢＭＣ之外，锌对各株细胞的增殖和功能均无促进作用，在浓度为１０￣１００μｍｏｌ／Ｌ时有明显抑制甚至毒性作用。ＥＤＴＡ对各株细胞的增殖只有抑制作用，在同一浓度时对杂交瘤细胞增殖和抗体分泌的抑制作用基本一致，而对ＰＢＭＣ增殖和Ｉｇ分泌程度不同的抑制作用，是因为不同功能的     

论涉外法律适用中最有利当事人原则的构建

我国涉外法律适用立法较于现代国际私法理论的发展已略显滞后,立法改进不应当仅仅是对文明各国法律适用制度的盲目学步,而应当直接根据人类法理学文明由神权到物权再到人权的演进路线构建现代人权保护的法律适用原则,即最有利当事人原则。