论我国撤并乡镇改革

当前我国某些地区出现乡镇行政区划改革,有一些乡镇改革已经完成,还有些正在酝酿改革。本文主要探讨我国撤并乡镇的原因、撤并乡镇的几种方式以及适合我国乡镇撤并的方式

The physico-chemical properties of the algicidal pigment deinoxanthin and the development of algicidal agent

塔玛亚历山大藻(Alexandrium tamarense)是一种有毒甲藻,常引发赤潮,对海洋环境及人类健康造成极大的威胁.前期研究发现,耐辐射球菌属的一株细菌Y35能够通过分泌杀藻化合物Deinoxanthin达到控制塔玛亚历山大藻生长的效果.为了加强Deinoxanthin的应用效果,对其在不同条件下的稳定性进行了研究.结果表明,杀藻化合物Deinoxanthin有较高的热稳定性,且在中性和碱性条件下稳定,在光照和紫外线辐射下易分解.而通过壳聚糖和海藻酸钠对Deinoxanthin进行包埋固定化,从而构建缓释微球提高了Deinoxanthin的稳定性.杀藻制剂能够高效地表现出杀藻效果,杀藻制剂的研发为杀藻细菌色素应用于藻华治理奠定了基础.Alexandrium tamarense is a toxic dinoflagellate,capable of forming harmful algal blooms( HABs),and poses a substantial threat to both the marine environment and human health. Our previous research found Deinococcus sp. Y35 could secret algicidal pigment deinoxanthin which showed efficient algicidal effect on A. tamarense,resulting in controlling the growth of A. tamarense. In order to enhance the algicidal effect of deinoxanthin,the stability of deinoxanthin under different conditions was investigated. The results show that the thermal stability of deinoxanthin was high and remained stable under neutral and alkaline conditions,yet was prone to decompose in the light and ultraviolet radiation. The stability of deinoxanthin was improved after immobilization by chitosan and sodium alginate. The algicidal agent could exhibit high algicidal effect on A. tamarense,laying the foundation for the application in the control of HABs.国家自然科学基金(No.41576109,31400318);; 河南师范大学博士科研启动基金(No.5101049170160)~

Study on Chemical Mutation of Selected Strain of Saccharomyces Carlsbergensis FB

通过EMS诱变,从啤酒酿造生产菌株啤酒酵母(Saccharomyces carlsbergensis)FB中筛选分离得到一株发酵液中双乙酰含量优于亲株的新菌株FB-E1。以120Bx麦芽汁为培养基,用内装300ml麦芽汁的500ml三角瓶于12℃下发酵,发酵8d后发酵液中双乙酰含量比亲株降低了42.7%。该菌株的其它发酵性能的测定结果表明其保持了亲株的优良性状,且遗传性状稳定。After mutation with EMS (ethyl methane sulfonate), a Saccharomyces carlsbergensis strain FB-E1 was selected fromoriginal strain FB, a strain for beer brewage production. The diacetyl content in the fermented liquid during the fermentation wasinvestigated in 500ml flask with 300ml 120Bx wort at 11℃. After 8d, the diacetyl content in the fermented liquid of FB-E1 was0.0706mg/L, 42.7% lower than that of its original strain A (0.1233mg/L). The results showed that flocculence and fermentationrate of strain FB-E1 were kept just as good as the original strain FB

Overexpression of VTE1 from Arabidopsis Resulting in High Vitamin E Accumulationand Salt Stress Tolerance Increase in Tobacco Plant~ *

维生素E在动物细胞内具有抗氧化等重要作用,但在植物体内的功能却鲜为人知.本实验利用CaMV35S启动子与来源于拟南芥的编码生育酚环化酶(TC)的cDNA(VTE1)构建的嵌合表达载体,以根癌农杆菌介导的叶盘法转化烟草W38.实验结果表明,具有卡那霉素抗性的再生植株经RT-PCR检测,得到了与阳性对照一致的495bp的目标片段;转基因植株的VE含量比对照植株高2倍左右,个别株系高达11倍.实验还发现,在耐盐性实验中转基因植株对盐的抗性明显高于野生型烟草;同时,在不同盐浓度(150、250mmol/L)胁迫下转基因植株VE含量比未转化植株增加了1.3~1.8倍,首次证明VTE1与植物耐盐性之间的关系.图7参30Vitamin E is an essential antioxidant in the human cells, while its function in plants is unknown. In this study, tobacco W38 was transformed with a construct containing a cDNA insert encoding tocopherol cyclase (VTE1) from Arabidopsis under the control of the cauliflower mosaic virus (CaMV) 35S promoter. The transgenic tobacco plants were confirmed by RT-PCR, which yielded the same PCR product of 495 bp as the positive control. Compared to the wild type controls, up to 11 times of vitamin E were accumulated in different transgenic lines. Interestingly, the over-expression of VTE1 dramatically increased the salt stress tolerance in tobacco plants. To our knowledge, it is first reported that VTE1 can increase salt stress tolerance in plants. Fig 7, Ref 30国家自然科学基金重点项目~

Study on removal boron from solargrade silicon with hydrometallurgy

湿法提纯作为冶金法制备太阳能级硅的前处理工序,可以去除大部分金属和硼杂质。研究了以氢氟酸-硫酸混合酸为浸出剂,有机溶剂甲醇作为后处理剂,去除硅粉中硼杂质的方法。采用电感耦合等离子体发射光谱仪(ICP)等对产品进行表征。酸浸过程优化工艺条件:硫酸质量分数为55%,氢氟酸质量分数为7%,酸浸温度为70℃、酸浸时间为4 H、液固质量比为8∶1。酸浸后可使硅粉中的硼杂质质量分数由6.893x10-6降至3.867x10-6,去除率为41.9%。在酸浸基础上采用有机溶剂甲醇作为后处理剂,杂质硼质量分数降至3.84x10-6,去除率为44.29%。从硼酸浸后形成的产物入手探索提高硼去除率的方法,实验验证了该方法的可行性,为研究湿法冶金预处理太阳能级硅提供了新的参考。As a pretreatment unit for preparing solargrade silicon(SG-Si) by metallurgic method,wet purification could remove most metallic impurities and nonmetallic impurities,such as boron.Experiment researched a new method to remove boron from SG-Si with mixed hydrofluoric acid-sulfuric acid as leaching agent and with organic solvent methanol as posttreatment agent.Samples were characterized by ICP and other analysis methods.When SG-Si powder had been leached at optimized conditions as follows:mass fraction of sulfuric acid was 55%,mass fraction of hydrofluoric acid was 7%,reaction temperature was 70 ℃,reaction time was 4 h,and liquid-solid mass ratio 8∶1,it was found that mass fraction of impurity boron in SG-Si was reduced to 3.867×10-6 from 6.893×10-6 and the removal rate was 41.9% after acid leaching;on the basis of the former procedure,mass fraction of impurity boron was reduced to 3.84×10-6 and the removal rate was 44.29% when treated with organic solvent.Experiment proved the feasibility of the method and provided a new reference for researching on the pretreatment of SG-Si by hydrometallurgy

Study on laser lift-off of GaN material in low pressure

为了研究低压环境对激光剥离的影响,利用准分子激光剥离系统和真空腔对gAn/蓝宝石样品分别在低压下和常压下进行多脉冲激光照射,之后用台阶仪测量样品的分解深度,得知相比常压环境,低压下gAn分解深度在脉冲次数为10次、20次、30次时分别增加了为10.2%,19.0%,24.3%,之后结合gAn材料分解过程和脉冲激光照射gAn/蓝宝石结构过程进行理论分析得到相应低压和常压下的gAn材料的理论分解深度,得到与实验一致的趋势。证明了低压环境能提高激光剥离速率。In order to study the effects of low-pressure environment on laser lift-off process,the experiment that a GaN/sapphire sample was irradiated by an excimer laser lift-off system in different pressure was carried out,and then the decomposition depth of the sample was measured with a profilometer.The results show that the decomposition depth of GaN in low pressure is increased by 10.2%,19.0% and 24.3% which corresponds to the number of pulses of 10,20 and 30.One-dimensional heat flow model of GaN/sapphire structure irradiated by laser was established.The temperature field in GaN was calculated and analyzed.The decomposition depth of GaN in different pressure was obtained.The theoretical calculation result is consistent with the experimental result.It indicates that the efficiency of laser lift-off in low pressure environment is higher than that in ordinary pressureenvironment.国家自然科学基金(11104230

高粱子粒淀粉表面色素的树脂分离研究

对纯化高粱淀粉过程中所得到的淀粉共生天然色素进行了树脂分离纯化研究。得到了树脂分离高粱淀粉共生色素的吸附动力学结果,3 种大孔吸附树脂 HPD-600、AB-8、H103 对高粱红的吸附为慢速平衡型。通过对树脂分离所得色素成份的红外光谱、紫外光谱、质谱分析得出,高粱籽粒淀粉共生色素与高粱壳中的高粱红主要成份是同样的物质,鉴定出所分离的主要成份之一为 5,7,4′-三羟基黄酮

活心丸(浓缩丸)治疗冠心病稳定性心绞痛的多中心、随机、双盲、安慰剂对照临床研究

目的观察活心丸(浓缩丸)治疗冠心病稳定性心绞痛的临床疗效和安全性。方法本研究采用多中心、随机、双盲、安慰剂对照研究方法,将480例气虚血瘀型冠心病稳定性心绞痛患者以3:1比例随机分为试验组(360例)和对照组(120例)。在西医常规治疗基础上,两组患者分别服用活心丸(浓缩丸)和安慰剂,1次2粒,每日3次;疗程8周。观察两组治疗前后主要指标(心绞痛症状积分)和次要指标(包括硝酸甘油减停率、中医证候积分及生活质量评价)及安全性。结果共454例患者完成试验(试验组336例,对照组118例)。与本组治疗前比较,试验组和对照组心绞痛症状积分和中医证候积分均降低,西雅图心绞痛量表评分改善(P<0.01);与对照组治疗后比较,试验组心绞痛症状积分、中医证候积分、西雅图心绞痛量表评分改善均优于对照组(P<0.01)。试验组心绞痛症状疗效总有效率为80.95%,硝酸甘油停减率为80.70%,中医证候疗效有效率80.65%,均高于对照组[36.44%、45.07%、38.99%(χ~2=58.21、40.94、66.55,P<0.01)]。试验组中既往有心梗史患者心绞痛症状总有效率为83.22%,中医证候有效率83.22%,西雅图心绞痛量表评分为(361.74±62.10)分,均高于无心梗史患者[60.92%、66.89%、(327.95±65.07)分(χ~2=13.89、13.26,P<0.01)]。治疗过程中未发生明显不良反应。结论活心丸(浓缩丸)治疗气虚血瘀型冠心病稳定性心绞痛疗效显著,尤其适用于既往有心梗病史的冠心病稳定性心绞痛患者,无明显不良反应。国家中医药管理局资助课题(No.国中医药科2016ZX04

低压滴灌系统中支管端压力调节装置的研究

本文在分析现有滴灌系统的基础上，介绍了常压滴灌系统与低压滴灌系统中压力调节器的结构及特点；着重研究了低压滴灌系统支管端压力调节装置，通过调节水位来稳定水压力，使入口端压力变化时出口端压力能基本保持不变；对调节水位的关键部件调节器（SZA）进行了理论分析和试验研究，研试了7种调节器SZA－1、SZA－2、SZA－3、SZA－4、SZA－5、SZA－6和SZA－7，比较了其优缺点及适宜的工作范围，通过试验选出适合温室、大田滴灌系统中应用的调节器并组装了支管压力调节装置。此种压力调节装置可适应低压滴灌系统压力，消除了严重的压力浪费现象，结构简单、实用可靠、价格低廉。该项研究对于滴灌技术在我国的应用与推广，具有一定的实用价值。研究的主要成果有：1. 温室用调节器SZA－5型调节器，可调压力范围为7.4－18.5m，流量范围约为1.96－2.56m3/h；SZA－6 (1)型调节器，可调压力范围为1－13m，流量范围约为0.68－1.21 m3/h。2. 大田用调节器SZA－6(2)型调节器，可调压力范围为4－17m，流量范围约为7.01－7.51 m3/h；SZA－7型调节器可调压力范围为3－8m，流量范围约为6.53－7.76 m3/h。3. 支管端压力调节装置采用上述调节器，组装集成了支管压力调节装置，确定了该装置的主要工作参数</span

The Thesis and Antithesis of East Asian Connection in Manchukuo

刘晓丽，华东师范大学中文系教授，文学博士。【中文摘要】日本在中国东北炮制的满洲傀儡国，是其“东亚一体实验场”，在此既可以发现日本构想“东亚一体”的霸权性格,又可以发现殖民霸权催生出的东亚连带真实情感。伪满洲国既是东亚连带的正题，又是东亚连带的反题。伪满洲国跨民族文学交流的实像，可以看到反东亚殖民主义的东亚连带意识如何发生，如何通过文学活动、文学形式呈现出来。为反抗强迫的东亚一体实验, 生活在伪满洲国的知识人反而将东亚作为自我之物,从抵抗到主体形成，发展出抗日民族主义与国际主义相结合的东亚连带意识。 【Abstract】Manchukuo concocted by Japan in Northeast China is an “integrated East Asia experimental field”. Here we can not only find the hegemonic character of “East Asian integration” of Japans ideation，but also the true sentiments of East Asian connection induced by colonial hegemony. Manchukuo was both the thesis and antithesis of East Asian connection. Through the real imagery of cross-national literary exchanges in Manchukuo，we can see how the consciousness of East Asian connection occurred in anti-East Asian colonialism，and how it was presented through literary activities and in literary forms. In resisting the mandatory integrated East Asia experiment，intellectuals in Manchukuo regarded East Asia as an object of selves. In the transition from resistance to subject formation，the consciousness of East Asian connection that combined anti-Japanese nationalism and internationalism took shape