种子干燥过程中收缩特性和复水特性的试验研究

生物材料干燥过程中会发生收缩现象．本对新鲜豌豆的收缩特性和复水特性进行了研究．比较了种皮对干燥曲线、收缩曲线、复水曲线和体积收缩系数的影响．研究表明，种皮不仅阻碍湿分由内向外运动也阻碍湿分由外向内运动．种子干燥过程中，干燥曲线与收缩曲线形状相似．热流密度越大，干燥速度越快，种子收缩也越快，同时种子也越容易破裂．在制作干燥方案时，考虑干燥速度的同时必须考虑种子的质量．     

Yangxueqingnao particles inhibit rat vascular smooth muscle cell proliferation induced by lysophosphatidic acid

Objective: To observe the effect of Yangxueqingnao particles on rat vascular smooth muscle cell (VSMC) proliferation induced by lysophosphatidic acid (LPA). Methods: The amount of3H-TdR (3H-thymidine) admixed in cultured rat VSMC was measured and mitogen-activated protein kinase (MAPK) activity and lipid peroxidation end product malondialdehyde (MDA)content of the VSMC were assayed. Results: 1×10-9, 1×10-8, 1×10-7 mol/L LPA in a concentration dependent manner, induced the amount of 3H-TdR admixed, MAP kinase activity, and MDA content of the cultured rat VSMC to increase. However, 5%, 10%,and 15% Yangxueqingnao serum preincubation resulted in a decrease of 23.0%, 42.0%, and 52.0% (P＜0.01) respectively in the amount of 3H-TdR admixed, a decline in VSMC MAP kinase activity of 13.9% (P＜0.05), 29.6% (P＜0.01), and 48.9% (P＜0.01)respectively, and also, a decrease in MDA content of VSMC of 19.4%, 24.7%, and 43.2% (P＜0.01) respectively, in the 1×10-7mol/L LPA-treated VSMC. Conclusions: LPA activates the proliferation and lipid peroxidation of VSMC in a concentration dependent manner. The LPA-induced VSMC proliferation is related to the activity of MAP kinases, enzymes involved in an intracellular signalling pathway. The results of the present study showed that Yangxueqingnao particles can effectively inhibit LPA-induced VSMC proliferation, MAP kinase activation, and reduce lipid peroxidative lesion.     

美国高校教育研究生培养的启示

一、对国内外教育研究生培养的探讨(一)概况通过比较分析,我国应着重研究下述课题:1.研究和协调教育研究生的学科专业布局结构、学科课程发展和软硬件资源分布合理性的问题。2.研究教育专业主动适应新形势的需求,着重培养教育研究生主动探讨教育改革动向的能力、定向教育教学科     

论创业教育与社会实践活动的有机结合

创业教育的最终目的是培养具有创业基本素质和开创型个性的建设者和接班人：社会实践活动是形成和提高创业基本素质的运动载体。创业教育要想得以迅速、健康的发展，必须要将二者有效地结合起来。     

Relationship between the size of pontocerebellar angle tumor and audiology

Objective: To study the relationship between the size of pontocerebellar angle tumor and audiology. Methods: Retrospective analysis of accoustically evoked brainstem response (ABR) waveforms and pure tone threshold in 27 subjects with tumor of pontocerebellar angle. Results: ABR wave forms and pure tone threshold were significantly affected statistically by the size of tumors, especially those tumor larger than 3 cm in diameter. Conclusion: The primary symptom of the patient was unilateral hearing loss. Early discovery of the lesion is important and ABR is a sensitive tool for early diagnose of the tumor.     

治理情境下的我国高校学科交流合作的路径探析

学科是大学课程的核心,是左右高校学术命运的指挥棒,决定着我国高校学术研究和学科建设的生存发展。学科制度的运作在一定程度上造成了学科专业之间的隔阂和封闭、行政管理部门的领导使学科合作不能完全按照教育规律和学术精神处置、学科评价制度和学科奖惩制度不科学等是高校学科缺乏交流合作的原因。治理情境下协调学科交流合作的路径是:发展交叉学科、综合性学科和边缘性学科,建设合理科学健全的管理制度,构建学习型院校以及重视学科之间的横向交流合作。     

学校亟需信息主管

改革传统教学模式,培养未来公民的信息素质,规范各类教育信息资源,学校管理创新等,在教育信息化进程中,学校亟需信息主管从深化教育体制改革的战略高度统筹规划。学校信息主管应做好教育信息化网络平台建设,教育信息化资源建设,教育信息化在教学、科研、管理行为中的渗透,学校教育信息化氛围的形成四个层面的工作。学校信息主管应同时具备教育技术学、计算机科学、现代教育管理等方面的知识。     

技师培训及其评价之管窥

培养高级技能型人才是把先进的科学技术转化为现实生产力的重要措施。本文主要研究了技师培训的目的、意义，应当解决的几个问题以及设置科学的技师评价系统。建立了评价技能型人才的数学模型。     

On mathematical understanding: perspectives of experienced Chinese mathematics teachers

Researchers have long debated the meaning of mathematical understanding and ways to achieve mathematical understanding. This study investigated experienced Chinese mathematics teachers’ views about mathematical understanding. It was found that these mathematics teachers embrace the view that understanding is a web of connections, which is a result of continuous connection making. However, in contrast to the popular view which separates understanding into conceptual and procedural, Chinese teachers prefer to view understanding in terms of concepts and procedures. They place more stress on the process of concept development, which is viewed as a source of students’ failures in transfer. To achieve mathematical understanding, the Chinese teachers emphasize strategies such as reinventing a concept, verbalizing a concept, and using examples and comparisons for analogical reasoning. These findings draw on the perspective of classroom practitioners to inform the long-debated issue of the meaning of mathematical understanding and ways to achieve mathematical understanding.     

多媒体技术的应用

多媒体计算机技术使计算机具有综合处理声音、文字、图像和视频信息的能力，它以形象丰富的声、文、图像信息和方便的交互性，极大地改善了人机界面，改变了使用计算机的方式，从而为计算机进入人灰生活 和生产的各个领域打开了大门，为人们的学习、工作、生活带来了深远的影响。