Analysis on Function Orientation and Development Countermeasures of New Agricultural Business Entities

Along with the rapid advance of industrialization and urbanization process, fostering new agricultural business entities become inevitable for agricultural transformation and the construction of agricultural modernization in China. The status of the new agricultural business entities determines the level of modern agricultural development. In recent years, new agricultural business entities have grew rapidly. However, there are still many problems including the difficulties in financing loans, inadequate agricultural insurance system, bad implementation of agricultural subsidies, jagged agricultural talents and so on. In order to foster new agricultural business entities, countermeasures should be carried out to ensure financial support, perfect the agricultural insurance, strengthen the level of agricultural subsidies, strive to develop the degree of specialization agricultural operators and so on.     

桑叶的生理功能及在猪生产中的应用

桑叶中富含丰富的蛋白质、碳水化合物和氨基酸等营养物质,具有降脂、抗氧化、降血糖等多样化功能,是良好的畜禽饲料资源.但对桑叶的重视程度不够,使得桑叶在我国未能得到大规模的开发利用,导致桑叶资源的大量浪费。文章对桑叶的生理功能和在猪生产中的应用进行相关综述。     

Effect of forsythiaside A on immune function in rats with ulcerative colitis

AIM To investigate the effect of forsythiaside A (FA) on immune function in rats with ulcerative colitis and its related mechanism. METHODS Healthy SD rats were randomly divided into 5 groups: control group (no treatment, normal feeding), model group (establishment of rat ulcerative colitis model), and low, medium and high doses of FA groups (treatment of the model rats with FA at 5 mg/kg, 20 mg/kg and 80 mg/kg, respectively). The malondialdehyde (MDA) content and superoxide dismutase (SOD) activity in rat colon tissues were measured by colorimetry, and the serum levels of tumor necrosis factor-α (TNF-α), interleukin-2 (IL-2) and IL-4 were detected by ELISA. The spleen index and thymus index, the percentages of CD3⁺, CD4⁺ and CD8⁺ T-lymphocytes in peripheral blood mononuclear cells （PBMC）, the serum IgA and IgG levels, and the serum complement C3 and C4 levels were also determined. RESULTS The colon tissues of the rats in model group showed obvious inflammation and ulceration, indicating that the animal model was successfully established. Compared with model group, the colonic inflammation and ulceration were significantly attenuated in FA groups, among which the high dose had the best effect. Compared with control group, the spleen index and thymus index of the rars in model group were decreased (P<0.05), MDA content in colon tissues was increased (P<0.05), and SOD activity in colon tissues was decreased (P<0.05). The levels of CD3⁺, CD4⁺, CD8⁺ and CD4⁺/CD8⁺ T-lymphocytes in PBMC, and the serum levels of C3, C4 and IL-4 were decreased (P<0.05), while the serum levels of IgA, IgG, TNF-α, and IL-2 were increased in model group as compared with control group. Furthermore, the spleen index and thymus index of the rats in FA groups were increased (P<0.05), the MDA content in the colon tissues was decreased (P<0.05), and the SOD activity in the colon tissues was increased (P<0.05). The levels of CD3⁺, CD4⁺, CD8⁺ and CD4⁺/CD8⁺ T-lymphocytes in PBMC, and the serum levels of C3, C4 and IL-4 were increased (P<0.05), while serum IgA, IgG, TNF-α and IL-2 levels were decreased in FA groups as compared with model group (P<0.05). CONCLUSION Forsythiaside A effectively attenuates the colonic lesions in rats with ulcerative colitis, and its mechanism may be related to reinforcement of oxygen free radical scavenging power, alleviation of inflammatory response, and enhancement of immune function.     

白花蛇舌草超微粉对小鼠免疫功能的影响

The assay was aimed to study the effect of Hedyotis diffusa Willd superfines powder on immune function. Three groups of mice were gavaged with the drugs at doses of 1.75,1.25 and 0.75 g/kg once a day for 7 consecutive days, repectively. The mice of control group were administered with the same volume of saline.At the last time, mice were injected into the muscle with Newcastle disease vaccine,and get peripheral blood on days 7, 14 and 21 after the medicine administration. The enhancement of innate immune responses were evaluated by using CCK-8 method, hemagglutination inhibition test, macrophage phagocytic function test and organ coefficient method. The levels of lymphocytes proliferative capacity, serum antibody, peritoneal macrophage phagocytosis and the indexes of immune organs in mice were extremely significantly enhanced (P＜0.01). Hedyotis diffusa dWilld superfines powder could extremely significantly regulate the immunity function of mice (P＜0.01).     

大学图书馆组织结构设计探讨

运用现代组织设计的相关理论,对传统大学图书馆的组织结构进行深入剖析,分析了制约大学图书馆功能发挥的各种因素,提出了现代大学图书馆的组织结构设计方案。该方案能够兼顾图书馆教学、学科建设与科研以及图书馆的基本服务功能。     

水生动物肌醇营养研究进展

肌醇是大多数水生动物保持健康、促进生长发育必需的营养素,它在细胞膜磷脂合成、神经递质传递和肝脏脂质转运等方面发挥重要作用。饲料中肌醇缺乏导致水生动物生长不良、体表充血、鳍条糜烂、体色发黑、脂肪肝等症状。本文综述了肌醇的理化性质,肌醇在水生动物营养中营养生理作用、需要量及影响因素等,同时还介绍了肌醇的来源和测定方法,并展望了肌醇在水生动物营养中进一步的研究和应用方向。     

科技英语疑问句的信息功能探析

句子的功能所实现的交际任务是传递信息。根据话语信息传递和语言交际功能理论原则,通过甄选科技英语相关例证作为分析语料,从英语的科技文体视角探析了疑问句在科技英语信息推进中的五大作用,同时指出了解这些相关作用的必要性。     

绿豆品种资源萌发期耐碱性鉴定

采用人工气候箱内培养皿培养,以混合碱Na HCO3∶Na2CO3(摩尔比)为9∶1模拟典型东北地区碱胁迫环境,在萌发期以50 mmol L–1溶液处理34份绿豆品种资源,蒸馏水处理为对照,每培养皿放30粒种子。培养第3天测定发芽势,第7天测定发芽率、下胚轴长、胚根长、下胚轴干重、胚根干重等指标,通过隶属函数法和聚类分析对参试材料耐碱性综合评价,并进行因子分析。利用隶属函数法对参试材料耐碱性排序表明,不同绿豆品种资源间表现出较大差异,聚类分析把参试材料按耐碱性强弱分为4大类,白绿11等9份材料为耐碱类型,公绿1号等19份材料为耐碱中间类型,吉绿3号等5份材料为碱敏感类型,潍绿7号为碱极敏感类型。因子分析结果表明,萌发指数、下胚轴干重、胚根长分别在萌发因子、生物量累积因子和伸长因子中的负荷量最大,可作为绿豆萌发期耐碱性鉴定的适宜指标。     

枣抑制消减cDNA文库构建与分析

枣树具有独特的开花结果特性,为获得枣花发育基因,以金丝4号枣不同发育时期的花蕾和同时期的叶片cDNA互为试验方和驱动方,利用抑制消减杂交技术分别构建了枣花和枣叶抑制消减杂交cDNA文库(SSH文库)。枣花和枣叶SSH文库重组率分别是92.05%和90.26%,插入片段长度均介于200~2 000 bp之间,主要集中于1 000 bp左右。分别从枣花和枣叶SSH文库中随机挑选1 000个阳性克隆进行DNA测序、组装拼接,结果显示枣花SSH文库中获得96条unigene,其中contigs 43个,singletons 53个,96条unigene预测得到73个ORF,经过同源比对分析获得有注释的序列20条,按功能分为7类;枣叶SSH文库中获得86条unigene,其中contigs 45个,singletons 41个,86条unigene预测得到70个ORF,经过同源比对分析获得有23条注释的序列,按功能分为6类。     

大兴安岭生态功能区建设的区划分析及“G＋X”管理模式构建

依据价值分析理念,对大兴安岭生态功能区进行了区划分析,并构建了大兴安岭生态功能区建设的＂G＋X＂管理模式。