改革兽医药理学实验教学，培养实用型兽医专业人才

兽医药理学实验是一门实践性很强的实验课程,其教学效果直接影响该专业整体教学质量的高低。在药理学实验教学中,从丰富教学内容,提高教学质量;改善教学方法,提高授课水平;增加实践机会,提高实践技能三个方面对兽医药理学实验教学进行改革,为培养实用型兽医专业人才提供保证。     

间接ELISA检测犬细小病毒病血清抗体方法的建立

用犬肾细胞增殖犬细小病毒,经纯化﹑标化作为包被抗原,建立检测犬细小病毒抗体的间接ELISA方法。结果表明:抗原最佳包被浓度5μg/mL;血清最佳稀释度1:40,反应时间45min;酶标抗体最佳稀释度1:2000,反应时间45min;S/P≥0.240判为阳性,≤0.190判为阴性,介于二者之间为可疑。该抗原不与犬瘟热﹑犬传染性肝炎﹑犬冠状病毒病﹑猫泛白细胞减少症病原阳性血清反应;批内重复试验变异系数小于10%,批间重复试验变异系数小于15%;对20份免疫犬血清进行检测,阳性检出率为85%,明显高于血凝抑制试验(65%),符合率为80%。试验结果表明建立的间接ELISA检测犬细小病毒抗体方法特异、灵敏、可重复性好。     

漂白胶贮存性质的研究(一报)——漂白胶脱氯反应的研究

本文通过测定脱氯程度不同的漂白胶样品的结合氯含量、热寿命、软化点和颜色,研究了漂白胶脱氯反应的性质,结合氯含量与热寿命的关系以及软化点和颜色的变化规律。发现漂白胶的脱氯反应是一级反应,分为两段,前一段的反应常数为后一段的四倍,说明一部分氯容易脱除,而另一部分则比较难,后者留在漂白胶中对贮存性影响不大。此研究结果为解决漂白胶贮存性差这一难题提供了理论依据和基本途径。通过测定一批样品在多年存放期间热寿命的变化,证实了本研究结论的正确性。     

连续映射的扩充Ⅰ

本文采用格论观点研究拓扑学中连续映射的扩充问题，给出陪域为局部紧的Ｔ＿２空间时连续映射扩充的充要条件，此结果包括陪域为紧空间或实数域的情况作为特例．     

Effects of Vacuum Mixing,Water Addition,and Mixing Time on the Quality of Fresh Chinese White Noodles and the Optimization of the Mixing Process

In this study, the effects of mixing process parameters (degree of vacuum, water addition, and mixing time under vacuum) on the cooking and sensory quality properties of Chinese white noodles were investigated by using one commercial‐scale noodle production line and one typical commercial wheat flour. Noodle appearance, firmness, elasticity, smoothness, and total quality scores were significantly improved as the degree of vacuum increased from 0 to 0.06 MPa, although lower sensory scores and larger cooking losses occurred when noodles were mixed at 0.08 MPa. Noodles with a water addition of 35% had the highest total score and the highest scores for each sensory factor. As mixing time increased, the sensory score of cooked noodles increased initially and then decreased. With a mixing time of 7 min, the sensory score was the highest and cooking loss was the lowest. The results of response surface methodology indicated that fresh noodle quality was most affected by the water addition, followed by vacuum degree. Added water was a more important source of variation for appearance, firmness, stickiness, smoothness, total score, and cooking loss than degree of vacuum and mixing time, whereas degree of vacuum was the predominant source of variation for color and elasticity. The interactions between the factors had little effect on sensory and cooking properties. The optimal mixing conditions were determined to be as follows: degree of vacuum, 0.06 MPa; added water, 35.6%; and mixing time, 7.25 min. Furthermore, vacuum mixing produced a more even, coherent, and closed microstructure for the sheeted dough than nonvacuum mixing.     

川西亚高山区域的水源涵养功能变化趋势

[目的]揭示川西亚高山区水源涵养功能的变化趋势,为明确该区的水源涵养动态特征提供科学依据.[方法]以岷江上游的杂谷脑河流域为例,根据杂谷脑河流域出口处的历年降水、气温和水沙资料,应用水量平衡原理,研究该流域水源涵养能力的变化特征.[结果]①研究区径流量呈明显减少趋势,平均每年减少2.83 mm,即水源涵养量平均每年提升...     

西葫芦新品种济葫2号的选育

济葫2号是以QL0133和QLO119配制而成的西葫芦一代杂交种,植株生长旺盛、株型紧凑、矮蔓、早熟、丰产,抗病毒病、白粉病、蔓枯病.瓜浅绿色,嫩瓜长20.0 cm,粗6.0 cm,粗细均匀、品质佳.每667 m2产量达6 500kg,适于早春茬、秋冬茬及越冬茬栽培.     

抛栽密度与促芽肥用量和化学促芽剂对中稻—再生稻的影响研究

此研究是针对再生稻生产中存在发苗不足、成穗率低、肥料利用率不高等因素而设计。试验结果表明,抛栽密度在18～31.5万穴/hm^2的范围内,再生稻粒重变化不大,实际产量基本一致,但再生稻发苗数和有效穗以18～22.5万穴/hm^2最高,分别达20.3～24.3苗/穴和18.9～20.1穗/穴;促芽肥施用过多,会影响头季中稻的产量,随促芽肥的增加,再生芽长也增长,但发苗数、有效穗数、结实率、单穴穗重则有下降趋势。同时,化学促芽剂4PU-30、高产精、腐殖酸、IAA能够增加头季中稻单穗重和促进再生芽的萌发生长,提高穗数和产量。     

秦巴山区玉米杂交组合主要性状与产量间的灰色关联度分析

运用灰色系统理论中杂交组合灰色评判原理与方法,对60个玉米组合的产量和9个产量因素进行灰色关联分析及综合评判,以明确不同玉米杂交组合产量和产量构成因素之间的关系。结果表明:秦巴山区玉米杂交组合产量与主要农艺性状的关联度大小排序为穗粗>百粒重>穗长>穗位高>穗行数>行粒数>出子率>株高>秃顶长。组合46综合性状最好(G=0.881),组合52次之(G=0.861),组合54综合性状最差(G=0.552),综合评判结果与杂交组合在生产实际中表现基本一致。