酸奶子中乳杆菌生长性能的研究

从新疆伊犁酸奶子中分离到38株乳杆菌，在不同温度下对其进行生长、产酸性能和蛋白水解能力检测。结果表明许多菌株的生长温度范围比对照菌株嗜酸乳杆菌要宽，不同温度下生长产酸性能和蛋白水解能力都与菌种相关，同时存在较大的菌株间差异。这些乳杆菌菌株生长特性多样，许多菌株性状优良，有广阔的开发应用前景。     

大豆分离蛋白膜配方及性能研究

以大豆分离蛋白（SPI）为主要原料,添加增塑剂（甘油）,还原剂（Na2SO3）制备大豆分离蛋白膜,研究在改变蛋白浓度,甘油、Na2SO3含量对大豆分离蛋白膜各项性能的影响.研究结果表明：甘油含量对膜性能有较大的影响,并且确定了大豆分离蛋白膜的最佳成膜配方.即：大豆分离蛋白含量4.0％,增塑剂浓度2.0％,还原剂浓度0.1％.此条件制得的蛋白膜成膜性能较好,抗拉强度可达7 418.62 g,厚度为0.97 mm,透光度0.131,水蒸气透过率20.06g/（h·m2）,透氧率0.93 g/（h·m2）,二氧化碳透过率3.88 g/（h·m2）.     

普通化学课堂教学改革探索与实践效果

化学演示实验是化学教学中不可或缺的组成部分。文中阐述了课堂演示实验在普通化学教学中的作用、地位、实施原则及实施效果,通过在普通化学理论教学中引入演示实验,显著提高了理论教学效率和质量、极大地激发了学生的学习热情、培养了学生的实践能力。     

对数学实验与多媒体课件结合的探讨

探讨了本科生数学类实验课程与多媒体课件的结合,分析了数学实验与多媒体课件的不足,对于在多媒体课件中加入数学实验的可行性进行了研究,并提出了相关解决方案。     

正交设计在微生物发酵试验中的应用

以优化乳酸菌固体发酵配方试验为例,选用L18(37)正交表,运用直观分析和方差分析给出试验的优选方向和估测最佳组合.     

VBA技术在计算机基础考试系统设计中的应用

介绍了VBA技术的特点及应用方法,研究了在计算机基础考试系统设计中应用VBA技术实现计算机自动阅卷的方法,主要包括Word和Excel操作题的自动阅卷方法。     

Sources of cumulus expansion enabling factor (CEEF) in porcine follicles

It was shown that expansion of porcine cumulus did not depend on oocyte-secreted factor(s), and it is therefore presumed that porcine CEEF may not be produced exclusively by the oocyte. In this experiment, we used mouse oocytectomized complexes (OOX), which were incapable of CEEF production, to assess the secretion of CEEF by evacuated zona, oocytes of different quality and somatic cells in the porcine follicles. The results showed that: (ⅰ) Evacuated zonae from both porcine and mouse oocytes did not produce CEEF. (ⅱ) Porcine oocytes of A, B and C types from 3—6 mm follicles were not significantly different in both production and activity of CEEF. (ⅲ) Both porcine OOX from 3—6 mm follicles and granulose cells from < 1 mm follicles secreted CEEF in a large quantity, independent of gonadotropins; mural granulose cells from 3—6 mm follicles, however, produced neglectable amount of CEEF. (ⅳ) The follicular fluid from 3—6 mm porcine follicles contained CEEF activity that was concentration-dependent, and thus it enabled cumulus expansion in 60% mouse OOX when used at 10% of concentration, but the expansion rate of mouse OOX decreased to 9% when the concentration was increased to 50%. (ⅴ) Mouse OOX cultured in porcine CEEF-containing M199 expanded only in the presence of gonadotropins, suggesting that the activity of porcine CEEF is hormone-dependent.     

Molecular dissection of plant height QTLs using recombinant inbred lines from hybrids between common wheat （Triticum aestivum L.） and spelt wheat （Triticum spelta L.）

In wheat, plant height is an important agronomic trait, and a number of quantitative trait loci (QTLs) controlling plant height have been located. In this study, using the conditional and unconditional QTL mapping methods, combined with data from five different growth stages over two years of field trials, the developmental behavior for plant height in wheat was dissected. Nine unconditional QTLs and 8 conditional QTLs were identified, of which 6 were detected by both methods. None of the 11 QTLs was detected at all of the 5 investigated developmental stages, but 7 QTLs were detected at certain stages in both years. Further analysis identified 9 unconditional QTLs at different stages, which could explain the phenotypic variation from 4.81% to 17.35%. It was noteworthy that one major QTL designated QHt-4B-2, which was located on chromosome 4B, was detected on May 18 and 25 in both years, and its genetic contributions to plant height ranged from 13.42% to 16.13%. Moreover, of the 8 conditional QTLs identified, six were detected in both years, in the order of QHt-3B→QHt-4B-1→QHt-4B-2→QHt-4D→QHt-5A and QHt-2B expressed at the same developmental stage. The results indicate that QTL expression during plant height development is selective and in a temporal order.     

实验教学改革与管理分析

实验教学是高等学校教学内容的重要组成部分,在理论与实践中起着桥梁的作用,加强实验教学的管理与创新,提高实验教学质量是各高等学校面临的重要课题。文中介绍了实验教学的地位和作用,分析了传统的实验教学模式存在的弊端,从实验教学管理角度出发,实施实验教学改革,完善实验教学体系,达到提高实验教学质量的目的。     

一类分数阶Schr?dinger方程解的存在性

考虑一类分数阶Schr?dinger方程解的存在性,在非线性项满足非二次增长的条件下,应用变分法得到了其非平凡解的存在性.