Advances on Detection Methods for Residues of Nitrofurans in Food

Nitrofurans are broad-spectrum antibiotics which have been widely used in food animals to the prevention and treatment of gastrointestinal infections.Due to abuse of drugs by criminals,animals could produce drug-resistant strains,which reduces the role of antibiotics.Meanwhile,excessive drugs residues in food has carcinogenic,teratogenic and mutagenic effects to the human body.In this paper,the damage and the detection methods of the residues of the nitrofurans in food are surveyed.The main detection methods include high performance liquid chromatography,liquid chromatography-mass spectrometry,liquid chromatography tandem mass spectrometry,enzyme-linked immunoassay,colloidal gold immunoassay and fluorescence immunity analysis method.The research status of various detection methods are summarized and the suggestions for further research are put forward.It is expected to provide reference for future research.     

芒果核仁油理化特性及其开发利用研究进展

芒果核仁是芒果加工的副产物,其中脂肪含量达9.0%~13.1%（干基）,从中提取的核仁油是一种优质油脂,具有较高的营养价值及开发利用前景。本文主要从芒果核仁油理化性质、脂质组成及开发利用等方面总结归纳近年来的科学研究进展,并与可可脂、类可可脂的甘油三酯组分进行对比分析,明确了芒果核仁油研究中存在的问题,并给出合理建议。     

增强学生对“作物栽培学实验”学习兴趣的探讨

该文根据在作物栽培学及其实验的教学过程中的心得体会,从实验教学内容和模式、教学手段、教学方法及考核办法等几个方面展开论述,总结了如何增强学生对该实验课程的学习兴趣,以便更好地改善教学质量。     

基于响应面法和NSGA-II算法的麦弗逊悬架优化

应用响应面法和经过改进的非支配排序遗传算法(NSGA-II)进行悬架结构参数优化.在ADAMS/Insight软件中进行设计参数的灵敏度分析，针对灵敏度较大的设计参数，建立车轮定位参数在车轮跳动过程中最大变化量的2阶响应面近似数学模型对该模型进行稳定性分析，并且应用加入精英保持策略和去除重复个体算法的NSGA-II优化算法对多目标响应面模型进行优化求解.优化结果表明该方法具有较高的精确性与有效性.     

Screening of Drought Resistance Identification Indexes for Rice (Oryza sativa L.) Cultivars in Ningxia

The morphological characters, physiological characters, yield traits and yield per plant of total 49 rice cultivars from Ningxia were investigated under conditions of water stress and non-water stress so as to determine the relationship between each trait and yield per plant under water stress and the relationship between each relative character and drought resistance coefficient under water stress and non-water stress. The correlation, grey correlation, stepwise regression and path analyses showed that the til er number per plant, plant height, grain density, effective panicle number per plant and grain number per pan-icle, total 5 traits, were significantly correlated with the drought resistance of rice, and they could be used to identify the drought resistance of rice in Ningxia. In addition, the drought resistance of rice was graded qualitatively according to the subordinate function value of corresponding drought resistance coefficient. The results showed that among the 49 rice cultivars from Ningxia, 6 rice cultivars were highly drought resistant, and 9 rice cultivars were moderately drought resistant, suggesting that the evalua-tion method was feasible and effective.     

日粮大豆活性肽对仔猪生长和相关理化指标及抗氧化性能的影响

为了探讨大豆活性肽对仔猪生长性能、血液指标及氧化应激参数的影响,试验选取仔猪48头,随机分为2组,每组设3个重复,每重复8头。对照组饲喂基础日粮,试验组饲喂用大豆活性肽替代2%豆粕的日粮。结果:添加2%大豆活性肽,20 d时,显著提高了仔猪粗脂肪、粗蛋白的消化率(P<0.05);血清总蛋白(TP)、血清白蛋白(ALB)和碱性磷酸酶(ALP)水平略高于对照组;50 d时,大豆活性肽显著提高了仔猪干物质、粗灰分、粗脂肪、粗蛋白、粗纤维的消化率(P<0.05),而且总抗氧化能力(T-AOC)、超氧化物歧化酶(SOD)活性及TP水平显著高于对照组(P<0.05);全程试验组日增重均显著的高于对照组,料重比、腹泻率显著低于对照组(P<0.05),然而对尿素氮(BUN)和甘油三脂(TG)影响不明显。     

《园林设计初步》课程教学探析

《园林设计初步》是园林专业的基础课。针对目前《园林设计初步》教学存在的问题，结合《园林设计初步》课程定位及特点，围绕制图基础、设计基础及设计入门三大教学内容，从理论教学和实训教学两个方面，提出当前形势下《园林设计初步》教学内容安排及教学方法，以期提高教学效果。     

学科影响指标在期刊评价中的作用探讨

对学科影响指标反映期刊学术影响力的情况、与其他评价指标之间的联系、在期刊学科分类工作中的作用及其存在的局限性进行了初步分析和探讨。     

氮磷钾不同施肥量对杨树菌根化苗生长的影响

通过实验对氮磷钾不同施肥量对杨树菌根化苗生长的影响方面进行了初探。