Effect of dietary vitamin C and ammonia concentration on the cellular defense response of Macrobrachium nipponense

This study examined the effects of dietary vitamin C and ammonia concentration on the cellular defense response of Macrobrachium nipponese . The response of the cellular defense was determined by monitoring changes in reactive oxygen intermediates in hemocytes, superoxide dismutase activity, catalase activity, glutathione peroxidase activity, glutathione reductase and glutathione transferase activity in muscle. The results showed that prawns fed the basal diet had a significant increase in reactive oxygen intermediates in response to exposure to ammonia-N. When dietary vitamin C was added to the feed, there was a significant decrease in reactive oxygen intermediates in response to exposure to ammonia-N. Total superoxide dismutase and glutathione peroxidase activity of prawns fed the basal diet decreased as ammonia-N increased. This decrease in activity was significantly less pronounced in prawns that were fed the dietary vitamin C supplement. In prawns that were fed the dietary vitamin C supplement there was no significant variation in catalase reductase or gluxathione reductase activity in response to variations in ammonia-N concentration. The glutathione transference activity increased at a low concentration of ammonia-N in prawns that were fed the dietary vitamin C supplement, but there was no significant variation in the prawns fed the basal diet. Overall the results indicate that dietary vitamin C supplements enhance the capacity of M. nipponese to respond to elevations in ammonia-N. This response involved several biochemical reactions known to be involved in cellular defense.     

双黄杀毒退烧颗粒对畜禽免疫功能的影响

研究了纯中药复方抗病毒制剂--双黄杀毒退烧颗粒对成年兔、鸡的体液免疫及细胞免疫功能的影响.HI抗体检测、MTT实验、E-玫瑰花环形成试验和酯酶染色试验的结果表明,双黄杀毒退烧颗粒能显著增强家兔的体液免疫作用,明显提高家兔和鸡的细胞免疫功能,对家兔的免疫增强作用优于鸡.     

GRC构件在建筑装饰业的应用

本文系统地阐述了GRC构件的产品性能,施工工艺及方法、特点,展望未来建筑业外装饰的发展趋势。     

怀孕后期感染PRRS病毒母猪所产新生仔猪的免疫反应

将PRRS病毒BJ－4株感染怀孕后期（约90天）的抗体阴性和阳性母猪，待自然分娩后，观察新生仔猪的免疫应答。结果显示，接种PRRS病毒BJ－4的母猪没有表现出明显的临床症状，没有出现流产死产。新生仔猪浦被子前血清中PRRS病毒核酸TR－PCR检测和ELISA抗体阴性，哺乳后特异性抗体出现，5－6周母源抗体逐渐下降；20日龄猪瘟疫苗免疫后疫苗抗体维持时间短，仔猪在40日龄后进入野毒感染的危险期。RT－nested PCR检测血清中PRRS病毒核酸和易感仔猪病毒特异性抗体监测的结果提示仔猪群内可能存在水平传播。流式细胞术检测外周血淋巴细胞亚群发现CD3^ 细胞减少，CD4^ 细胞显著下降，CD8^ ，CD4^ CD8^ 和SLA－DR^ 表达细胞升高。以上结果表明在感染后病毒能够长期持续性存在，猪场内新生仔猪母源抗体逐渐下降后，通过水平传播受到感染，感染后免疫应答受到不利影响。     

苜蓿施用污泥效果的研究Ⅰ对苜蓿生长及元素含量的影响

将兰州市七里河污水处理厂生活污泥施用于人工种植的新疆大叶苜蓿草地，探讨了不同施用量对苜蓿生长及各元素含量的影响。研究结果表明，施用1.0-2.0kg/m^2污泥，苜蓿地上生物量显著增加，第一年增产23％－31％，第二年增产15％－31％。施用污泥苜蓿地上和地下部组织中N，P，Ca,Mg和Mn的含量总体呈增加趋势，Fe含量显著增加，而K和重金属元素Ni、Pb、As和Hg的含量与对照无显著差异，Zn和Cu的积累增多，但地上部组织中重金属元素均未超过植物中的平均含量，施用污泥未对新疆大叶苜蓿造成重金属污染。     

鸡大肠杆菌病中草药佐剂多价灭活苗的研制——Ⅰ、疫苗生产工艺

采用鸡大肠杆菌多发病型菌株以及地方病型菌株作为制苗用菌种，保证了疫苗既具有一定的广谱性，又具有一定的特异性；采用液体通气培养方法，在一定程度上提高了菌数；采用中草药蜂胶作为佐剂不但可有效地提高机体的免疫功能，同时兼具有治疗，保健和促生长作用，另外蜂胶还可以增大抗原表面积，延长抗原在组织的贮存时间，可持久地释放抗原，保证了机体持续产生高效价抗体。     

APPLICATION AND EFFECTS OF RARE-EARTH ON SEEDLINGS

In order to improve the quality of seedlings and economic benefits,rare--earth experiments were carried out on eleven seedling-age-types of four silvicultral treespecies.Some indexes such as the increment,biomass and chlorophyl content weredetermined.The results showed that rare-earth can improve the growth in height anddiameter,increase the bioprductivity and increase the mean benefit by887766.29 yuan/hm~2.It is an effective method to improve the quality of seedlings for the characters such as lowcost and easy grasping.And the method can be widely used in seedling.     

猴头菌新菌株宁猴6号的选育初报

采用多孢分离技术产生多个新组合 ,经驯化筛选获得猴头新菌株宁猴 6号 ,宁猴 6号为适合用针叶林木屑物料栽培的新菌株。生物学特性表明 :猴头菌宁猴 6号菌丝生长适温 2 5～ 2 8℃ ,子实体生长适温 15～2 0℃ ,菌丝生长期短 ,36～ 4 0d长满瓶底 ,栽培袋在常温下培养 4 3～ 5 0d菌丝满袋。室内栽培生物学效率达5 6 .0 0 % ,室外栽培生物学效率达 6 1.4 0 % ,子实体中型匀称近球型 ,柄短或无柄 ,刺长 0 .9～ 2 .2cm。宁猴 6号不仅适于阔叶木屑栽培 ,最突出的是适应针叶林木屑栽培     

通用开放式绘图仪接口软件设计与实现

本文针对TANGO软件所支持的图形输出设备中不包括CALCOMP系列绘图仪的问题,设计了TANGO图形文件与CALCOMP系列绘图的接口软件.由此阐述了一种通用图形描述语言及开放式绘图仪接口软件的设计思想与技术实现.     

中国西部地区县域旅游开发实证分析——新疆库车县旅游开发的若干思考

新疆库车县具有丰富而独特的自然和人文旅游资源 ,资源组合优势突出。旅游业可以成为库车经济发展的主导产业。目前主要问题是地处偏远 ,交通不便 ,开发不够 ,旅游环境有待改善 ,缺乏宣传 ,知名度不高等。开发库车旅游应当深化对库车旅游资源的认识 ,树立、更新旅游观念 ;着力设计、塑造库车旅游形象 ,打造库车旅游品牌 ,突出库车旅游在新疆旅游中的地位 ,全方位开展宣传推介活动 ,应当加大旅游景点的开发力度 ,改造旅游设施 ,重视旅游安全 ,改善旅游环境 ,注意库车少数民族民俗保护 ,进一步光大龟兹文化 ,设计、开发多种形式的旅游项目和旅游路线 ,安排丰富合理的旅游日程。