高校知识女性持续发展的障碍及其对策探析

经济时代给广大高校知识女性带来了发展契机,观念的更新、广阔社会空间的提供为妇女全面提高素质创造了条件,同时它也向知识女性提出了严峻挑战:传统的束缚、自身生理和心理的制约等限制了女性的全面发展.文章分析了知识女性可持续发展的障碍,并就帮助、鼓励和支持女性得到可持续发展提出了若干对策.     

Hypoosmotic shock induces a stateⅠtransition of photosynthetic apparatus in Dunaliella salina

State transition has been considered as a short-term chromatic adaptation of photosynthetic apparatus in plants[1,2]. When photosystemⅡ(PSⅡ) is excited more than photosystem Ⅰ(PSⅠ) upon illumination, the inter-system electron carriers, such as plastoquinone (PQ) and cytochrome b6f complexes (Cyt b6f), are reduced, and a thylakoid membrane-bound protein kinase for light har-vesting chlorophyll-binding protein (LHCP) is activated, resulting in LHCP phosphorylation[3]. Upon phosphoryla-…     

Three-dimensional recon-struction and analysis of structure characteristics on senile plaques of Alzheimer’s disease

Alzheimer’s disease (AD) is a neurodegenerative dis-order characterized by progressive dementia. The classic neuropathological lesions of Alzheimer’s disease are se-nile plaque (SP) associated with fibrillar and amorphous nonfibrillar amyloid β (Aβ), neurofibrillary tangles (NFTs) and loss of neurons[1,2]. Many studies show that Aβ plays akey role in the pathogenesis of AD, and fibrillar Aβ has relatively high neurotoxic effects[3―5]. Therefore, studying the mechanism of Aβ aggre…     

亲权鉴定中DNA技术的应用

DNA亲权鉴定测试与传统的血液测试有很大的不同.它的优点深受法庭科学界青睐.本文就此浅谈DNA技术在亲权鉴定中的应用.     

改革实践教学强化能力的培养

加强素质教育,重视学生创新能力的培养,是二十一世纪高等教育教学改革的一项重要内容.按照教育部关于高等教育教学改革的指导思想与原则以及专业调整方案,对我校原有材料类专业进行重组、整合与拓宽.将原有水泥、陶瓷、玻璃、耐火材料与硅酸盐工程等专业,拓宽为现在的无机非金属材料工程二级学科专业,形成了以二级学科建设为重点,向材料科学与工程一级学科拓宽,向特定专业领域深化的新的培养模式,并构建了新专业的培养方案.同时,结合课程体系的调整,对实践教学方式与教学内容进行了相应改革,不但使理论课教学得到加强,同时强化了学生的实践能力与创新能力的培养.……     

Modulation of low-frequencyoscillations in GaAs MESFETs’ channel current by sidegating bias

The demand for higher speed and better functionality incircuits using GaAs metal-semiconductor field-effect tran-sistor (MESFET’s) has led to higher density. Higher den-sity has caused increasing sensitivity to interaction amongFET’s. When we place an electrode nearby the MESFETand set the voltage across the electrode beyond a criticalvalue, the drain current ID will decrease abruptly and thesidegate current ISG will increase rapidly. This is calledsidegating effect[1,2]. The sidega…     

基于GIS与AHP属性辨识模型的地质灾害危险性评价——以涪陵页岩气开采区为例

【目的】建立新的区域性地质灾害评价模型，对涪陵页岩气开采区的地质灾害危险性进行评价。【方法】根据涪陵页岩气开采区的地质、水文和气候特征，选取归一化植被指数(NDVI)、土地类型、坡度、坡高、年峰值周降雨量、年峰值日降雨量等6个主要因素作为评价指标。基于GIS平台，采用AHP属性辨识模型对研究区的地质灾害进行危险性评价。【结果】涪陵页岩气开采区的地质灾害危险性较高，极高危险区面积为1466 km2，高危险区面积为743.6 km2，两者分别占开采区总面积的9.6%和52.8%。通过开采区173个历史地质灾害点的验证表明，评价的地质灾害危险性区划与历史地质灾害点的空间分布一致，其中98个分布于极高危险区，56个分布于高危险区，分布于中危险区和低危险区的仅有19个。用受试者工作特征曲线法对上述评价结果进行精度评估，曲线下的面积百分比达82.8%，验证了评价模型的可行性。【结论】研究结果对涪陵页岩气开采区输气管线、道路和房建等的规划和防灾减灾具有重要指导意义。     

美国制造业的发展和迎接21世纪挑战的辽宁

21世纪是信息时代，市场竞争将趋于国际化。辽宁制造业将面临着如何适应市场经济的发,如何创造出更多财富的尖锐问题。本文回顾了近10年来美国制造业快速响应制造模式、并行工程生产模式的网络技术及MCAD／MCAM技术三大发展，认为辽宁制造业只有迅速推广上述三种技术，才能解决辽宁产品开发落后与辽宁较雄厚的制造技术、设备之间的“等米下炊”的尖锐矛盾，才能使辽宁制造业再次“腾飞”     

Evidence that sensory traps can evolve into honest signals

Conventional models explaining extreme sexual ornaments propose that these reflect male genetic quality or are arbitrary results of genetic linkage between female preference and the ornament. The chase-away model emphasizes sexual conflict: male signals attract females because they exploit receiver biases. As males gain control of mating decisions, females may experience fitness costs through suboptimal mating rates or post-copulatory exploitation. Elaboration of male signals is expected if females increase their response threshold to resist such exploitation. If ornaments target otherwise adaptive biases such as feeding responses, selection on females might eventually separate sexual and non-sexual responses to the signal. Here we show that the terminal yellow band (TYB) of several Goodeinae species evokes both feeding and sexual responses; sexual responsiveness phylogenetically pre-dates the expression of the TYB in males and is comparable across taxa, yet feeding responsiveness decreases in species with more elaborated TYBs. Displaying a TYB is costly, and thus provides an example where a trait arose as a sensory trap but has evolved into an honest signal.     

Renal handling of bilirubin photoderivatives

The renal handling of unconjugated bilirubin in the dark and during light exposure was analyzed using an isolated rat kidney preparation. The parameters tested were pigment disappearance from the perfusion medium, pigment uptake by tissue, and its renal clearance. The results indicated that despite the fact that pigment disappearance from the medium was similar for both forms of pigment, the extraction ratio was higher for irradiated pigment than for pigment in the dark. When renal clearance of pigment was plotted vs pigment uptake of tissue, the results indicated that irradiated pigment may be more efficiently removed by the kidney. In addition, data on the rate of secretion of p-aminohippurate suggested that both pigment forms shared a common site for secretion.