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.     

红曲霉色素的提取

本实验确立了一种新的红曲霉色素提取方法:以红曲米为原料,乙醇为提取剂,得到的提取液再以正己烷提取分离。结果表明,此法所得的红曲霉色素是水溶性的,宜于用作食品添加剂。此外,还对影响提取的因素进行了探讨,并提供了最佳提取方案。     

原油加热炉除尘技术研究

加热炉一般以原油或渣油为燃料，在其运行过程中，大量烟尘沉落在炉体内，烟尘的不断堆积，导致加热炉热效率下降，而吹扫炉膛又使大量烟尘进入环境，造成环境污染，为达到污染物的国家排放标准，就必须对排放的烟尘进行回收治理，根据燃油烟尘易漂浮并沾粘的特点，对几种除尘技术进行了比较，重点推荐了效果较好的滤袋式除尘器技术，提出了现场应用的要求。     

二十三个柚品种特性评价

对1965年定植的23个柚(Citrus grandis Osbeck)品种进行了20多年的性状比较。筛选出矮化类型6个,早熟和晚熟类型各3个,丰产类型6个,品质优良类型11个。发现仅有部分柚品种富含维生素C;果汁中维生素C含量与酸含量呈明显负相关。证实长寿沙田柚中的冬瓜圈和古老钱两个选系比广西沙田柚更丰产优质;垫江白柚质优,但产量低。简述了各参试品种的利用前途。     

STUDY ON THE EFFECT OF CLIMATE CHANGE ON FOREST FIRE IN HEILONGJIANG PROVINCE

GENERALCoNDlTloNABoUTCLI-MATECHANGEINHElLoNGJIANGPRoVINCEDtlrlngthepasscdll)()}ears(l88l-l`)8(j)ors().tllctcndenc}'ofmcanairtc111pcraturcincrcasct\ithfluctuationcl11ergcdin\ariousrcglonsofHcllonViangproxincc.Airtcmpcra-turcinl98()s-rcachcdtl1emaxil11un1uithinthcpasscdll)()y'cars.Thisphcl1ol11enonaccordcd``iththctcndenc}'ofglobalclil11ate\"ar1ni11g.Thel11eanairtc111peralurcil1tl1creccl1tl()}car(l()8()-l()8`))incrcascdb}l).6"Cascom-pal-cd\`ltl1tl1atll1tl1clbrl11er3())'carsacc…     

火鸡隐孢子虫在鹌鹑体内发育史的研究

分离自鹌鹑的火鸡隐孢子虫经口感染２日龄鹌鹑，潜在期为３ｄ，开放期为４－１８ｄ。它在鹌鹑体内发育史过程为：卵巢经口接种后，于十二指肠，空肠，回肠肠腔中子孢子脱囊，至接种后６ｈ全部子孢子脱囊完毕。接种后６ｈ在小肠中出现滋养体。接种后１２ｈ在小肠中出现内含８个裂殖子的裂殖体及裂殖子，接种后４８ｈ滋养体和裂殖体开始出现于直肠。接种后５４ｈ，在小肠，直扬中出现含有１６个子弹形小配子的小配子体。小配子与大配子     

辽宁绒山羊选种方法的研究

对辽宁绒山羊山羊绒品质,包括不同年龄、性别山羊的细度、伸直长度、强度和伸度4个主要指标进行测定,估测绒层厚度、产绒量、体重、细度4个主要经济性状的遗传参数、表型相关和遗传相关。结合育种实践提出在生产中的选择指数。     

准噶尔无叶豆水分生理生态学特性的初步研究

准噶尔无叶豆是我国荒漠的稀有植物,现已被列入国家重点保护的种类。通过对该植物水分生理生态学特性的初步研究得知:其同化枝水势变化幅度较大,日变化进程为双峰型;蒸腾作用不大,日变化表现为单峰型。蒸腾速率同植物表面温度,大气相对湿度及光照等生态因素有密切关系。经观测统计,在一定的温度范围内,均呈线性关系。