上海动物园游客保护教育需求及满意度调查

本研究利用问卷调查收集了上海动物园游客类型与特征、游园目的、游客游览时获得野生动物科普知识的途径、游客对现有科普活动的评价、对科普教育的需求、游客满意度、意见与建议等,并进行了研究。结果表明,大部分(66.02%)游客为本市居民和暂居本市的中青年。近9成(89.51%)游客携带孩子游览动物园,其中超过半数(52.34%)为父母与孩子共同出行。游客游园目的主要为观看动物、游玩娱乐和让孩子学习动物知识。观察动物和阅读动物科普说明牌是游客学习动物科普知识的主要途径。互动类和深度游类项目,是游客最愿意参加的活动类型。游客更希望园方从动物科普设施、饲养员讲解、志愿者讲解这3方面提升其教育功能。总体而言,游客对上海动物园感到满意,超过半数(53.81%)表示很满意。具体而言,动物说明牌的满意度最高,其次是路面状况和路标指示牌。基于研究结果,提出以下建议:提升科普活动的内涵和互动性;提升游园体验,延长游览时间;寻找迎合和引导的平衡;完善基础设施。     

中国古老月季品种远缘及品种间杂交亲和性评价

以5份中国古老月季品种、3份野生蔷薇和22份现代月季品种为试材,采用常规人工授粉杂交方法,同时结合花粉活力及倍性测定情况,研究了古老月季远缘和品种间的杂交亲和性,筛选出了高亲和性的杂交亲本,以期为中国古老月季的杂交育种、亲本选择提供参考依据.结果 表明:古老月季品种间杂交亲和性最高,所配组合的杂交成功率达87.50％,古老月季与野生蔷薇、现代月季的远缘杂交亲和性也较高,所配组合的杂交成功率均高于50％,说明古老月季远缘和品种间的杂交亲和性均较好,因此,在杂交工作中,选用古老月季作为亲本材料有较好的杂交亲和效果;古老月季杂交亲和性与花粉活力、亲本倍性,正反交等因素相关,选择月季亲本时要综合考虑各因素,以提高月季杂交的成功率;结合远缘杂交、品种间杂交以及人工授粉结实情况,筛选出适合做母本的古老月季品种为"大花香水""小花香水""月月红",适合做父本的月季品种为"金樱子""可爱的绿".     

Expression,Purification and Activity Evaluation of Mb1230 Gene of Mycobacterium bovis

To explore the value of Mb1230 protein of Mycobacterium bovis in the diagnosis of bovine tuberculosis,we obtained the Mb1230 gene by PCR and constructed recombinant plasmid pET-22b-Mb1230.Recombinant Mb1230 protein was obtained by IPTG induction and purified by affinity chromatography.The activity of the recombinant protein was evaluated by TST test,IGRA test and indirect ELISA.The size of the recombinant protein matched with the theoretical value proved by SDS-PAGE;Western blotting result showed that the recombinant protein could react with mouse anti-His antibody,and had specific band;The results of TST test,IGRA test and indirect ELISA test also showed the recombinant protein had antigenic activity.The results indicated the recombinant protein Mb1230 had good B cell and T cell activity,so,it had the potential application in the diagnosis of bovine tuberculosis.     

试验统计方法课程教学改革探索与实践

介绍了试验统计方法课程的基本理论体系和教学目标,指出了试验统计方法课程教学中存在的主要问题,并提出了课程教学改革理念及思路,以为试验统计方法课程教学改革提供参考。     

5‐Aminolevulinic Acid Activates Antioxidative Defence System and Seedling Growth in Brassica napus L. under Water‐Deficit Stress

The present study assesses the effects of 5‐aminolevulinic acid (ALA, 0, 0.1, 1 and 10 mg l^?1) on the growth of oilseed rape (Brassica napus L. cv. ZS758) seedlings under water‐deficit stress induced by polyethylene glycol (PEG 6000, 0 and ?0.3 MPa). Water‐deficit stress imposed negative effects on seedling growth by reducing shoot biomass, cotyledon water potential, chlorophyll content and non‐enzymatic antioxidants (glutathione and ascorbic acid) levels. On the other hand, water‐deficit stress enhanced the malondialdehyde (MDA) content, reactive oxygen species (ROS) production, enzymatic antioxidants activities, reduced/oxidized glutathione ratio (GSH/GSSG) and reduced/oxidized ascorbic acid (ASA/DHA) ratio in seedlings. Application of ALA at lower dosages (0.1 and 1 mg l^?1) improved shoot weight and chlorophyll contents, and decreased MDA in rape seedlings, whereas moderately higher dosage of ALA (10 mg l^?1) hampered the growth. The study also indicated that 1 mg l^?1 ALA improved chlorophyll content, but reduced MDA content and ROS production significantly under water‐deficit stress. Lower dosages of ALA (0.1 and 1 mg l^?1) also enhanced GSH/GSSG and ASA/DHA as compared to the seedlings under water‐deficit stress. The antioxidant enzymes (ascorbate peroxidase, peroxidase, catalase, glutathione reductase and superoxide dismutase) enhanced their activities remarkably with 1 mg l^?1 ALA treatment under water‐deficit stress. It was also revealed that 1 mg l^?1 ALA treatment alone induced the expression of APX, CAT and GR substantially and under water‐deficit stress conditions ALA treatment could induce the expression of POD, CAT and GR to a certain degree. These results indicated that 0.1–1 mg l^?1 ALA could enhance the water‐deficit stress tolerance of oilseed seedlings through improving the biomass accumulation, maintaining a relative high ratio of GSH/GSSG and ASA/DHA, enhancing the activities of the specific antioxidant enzymes and inducing the expression of the specific antioxidant enzyme genes.     

从社会安全阀的视角看高校BBS

BBS是大学生比较喜欢的一个信息交流平台,其匿名特征,使得BBS成为许多大学生向社会和学校表达诉求的场所。应在规范、引导的前提下,重视、保护和发挥BBS的社会安全阀功能。基于这个目的对高校BBS的功能进行探析。     

大麦株高及其构成因素的杂种优势和配合力分析

选用7个株高差异比较明显的啤酒大麦品种(系)为亲本,按照Griffing双列杂交方法 II配制21个杂交组合,2年重复试验,分析大麦株高及其构成因素的杂种优势和配合力关系。结果表明:株高及其构成因素的杂种优势均存在广泛的变异,除倒1节间长度外,其余节间长度的平均优势均为负值,倒3,4节间长平均优势最大;株高及其构成因素的遗传同时存在显著的加性效应和非加性效应,以加性效应为主;苏啤3号和港啤2号的株高及各节间长一般配合力效应值均表现为较明显的负向效应,其在育种工作中对改良啤用大麦后代株高结构有良好的作用;品系连0719穗长一般配合力具有较大的正向效应,在改善穗长性状育种中具有一定的利用价值。除倒5节间长外,杂种组合扬农啤5号×苏引麦2号、港啤1号×苏啤3号、苏引麦2号×苏啤3号的各节间长均表现为较明显的负向效应,其穗长均表现为正向效应,可作为选育矮秆或半矮秆大麦品种的较优组合;株高及其构成因素具有较高的遗传力,表型变异受环境影响较小,宜早代选择。     

具有风险相依结构的平衡信度估计

在保险实务中，风险之间具有一定的相依结构. 通过考虑保费的目标估计来对风险保费进行了研究，采用正交投影的方法求解了最优问题，在平衡损失函数下得到了风险等相关的齐次和非齐次信度估计. 结果表明得到的信度估计具有经典信度模型的加权形式.     

Evaluation on Tolerance of Montmorillonite as a Mycotoxin Adsorbent

In order to study the tolerance dose of Kunming mice to montmorillonite as a mycotoxin adsorbent in diets,the experiment selected 60 healthy male Kunming mice with initial average body weight of (17±0.12)g,randomly divided them into 5 treatments with two replicates per group and 6 mice per replicate.Five experimental diets were added to 0 (control group),0.5%,1%,2% and 5% montmorillonite,respectively.After 30 days,the growth performance,nutrients apparent digestibility,serum biochemical indices and internal organization were tested to determine the tolerance dose of montmorillonite for Kunming mice.The results showed that the ADFI was significantly increased in 0.5% group (P< 0.05),while there were no significant differences in ADFI and ADG between 1% group and control group (P> 0.05),then the ADFI was significantly decreased with the increasing of montmorillonite supplemental level (P< 0.05).The ADG in 2% group had no significant difference when compared with the control group (P> 0.05),while significantly lower than that in 0.5% and 1% groups (P< 0.05).The apparent digestibility of DM,CP and EE showed no significant effect at any level of montmorillonite (P> 0.05).Serum ALT,AST activities and MDA content were gradually increased with the montmorillonite supplemental level increasing,and that in 1%,2% and 5% groups were significantly higher than that in control group (P< 0.05),but there were no significant differences between 0.5% group and control group (P> 0.05).Tissue sections showed that mice livers were damaged in varying degrees when the montmorillonite supplemental level was 5%.In conclusion,based on a comprehensive consideration of all indexes,it could be seen that the tolerance dose of the tested montmorillonite for Kunming mice was between 0.5% and 2% when mycotoxin contents in diets were in security range.     

基于分段波形的信号瞬时频率计算方法

针对局部均值分解（Local Mean Decomposition，LMD）中乘积函数（Product Function，PF）分量的瞬时频率计算问题，引入了一种新的信号瞬时频率计算方法.该方法基于分段波形，先将信号分成若干个全波段（full wave），然后以一组递增的反正弦函数定义每个全波段的瞬时相位，进而得到信号的瞬时频率.由该方法得到的瞬时频率理论上是正的、稳定的并且能够确保信号局部特征信息的完整.应用该方法计算了仿真信号和实际齿轮故障振动信号的瞬时频率，并与其他方法求得的瞬时频率进行了对比.结果表明，本文方法非常适合求取信号的瞬时频率.