热处理对水牛乳稳定特性的影响     

瓦云超  赵海晴  李仁芳  刘演景  伍云  谢秉锵  蒋欣荣  瞿恒贤  王琴  张奇波  于凡  任远庆  顾瑞霞 《乳业科学与技术》2016,39(3):25-28

为比较不同热处理条件对水牛乳稳定性的影响,实验采用不同条件热处理后的pH缓冲容量、总溶解固体（total dissolved solids,TDS）、蛋白沉淀量及表观黏度等指标研究杂交高代水牛乳样品。结果表明：与未经处理的水牛乳样品相比,水牛乳经不同条件热处理后,其pH缓冲容量、TDS、蛋白沉淀量及表观黏度皆发生显著变化。其中水牛乳分别在经121℃/15 min和95℃/5 min处理后,其pH缓冲容量、TDS、蛋白沉淀量及表观黏度分别达到最大值和最小值。因此,认为在本实验研究范围内,水牛乳经121℃/15 min及95℃/5 min处理后,对其稳定性影响最大。  相似文献   

牧草新品种黔草1号高羊茅的选育   总被引：2，自引：0，他引：2  

吴佳海  牟琼  唐成斌  尚以顺  莫本田  瓦庆荣 《贵州农业科学》2006,34(4):75-79

黔草1号高羊茅是利用贵州地方野生资源作亲本,采用改良混合选择法,经10余年的选育研究育成的新品种。该品种抗逆性强、适应性广、坪用性好、耐践踏、持续性好、绿期长,返青期比引进品种凌志提前7 d,枯黄期晚3 d;种子成熟期集中,种子平均产量比对照品种高20%以上。适应我国长江中下游低山、丘陵等地区种植,是运动场草坪、环境绿化、生态治理的优良草种。  相似文献   

用于狂犬病常规诊断的一种组织培养感染试验     

Webs.  WA 《中国兽药杂志》1989,(2):45-48

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Multigeneric resistance to benzimidazole anthelmintics in four sheep flocks     

West DM  Pomroy WE  Probert AD  Charleston WA 《New Zealand veterinary journal》1989,37(2):76-78

Clinical parasitism associated with multigeneric resistance to benzimidazole anthelmintics was investigated in four sheep flocks during February and March 1989. The genera considered resistant were Haemonchus and Nematodirus spp. on all four farms and Trichostrongylus and Ostertagia spp. on three of the four farms. It is suggested that when investigating cases of suspected drench resistance, post-drenching worm counts are useful to help identify the resistant worm species present.  相似文献   

A quantitative assessment of primary and secondary immune responses in cattle using a B cell ELISPOT assay     

Lefevre EA  Carr BV  Prentice H  Charleston B 《Veterinary research》2009,40(1):3-Feb;40(1):03

The aim of the study was to build a comprehensive picture of the appearance in the blood stream of Ag-specific plasma cells and memory B cells in the bovine model. For this purpose, we have developed a method allowing the detection and quantification of both cell types within individual calves immunised with ovalbumin. During the primary response, we detected a burst of ovalbumin-specific plasma cells at days 6 and 7 post-immunisation, which was followed by the production of specific Ab, whereas a gradual increase of memory B cells was only detected from day 15. As expected, a boost immunisation performed 7 weeks later induced a quicker and stronger secondary response. Indeed, a burst of plasma cells was detected in the blood at days 3 and 4, which was followed by a strong increase in Ab titres. Furthermore, a burst of memory B cells, and not a gradual increase, was detected at days 5 and 6 post-boost immunisation. Importantly, we showed a strong correlation between the anti-ovalbumin-specific IgG titres detected 5 months after secondary immunisation and the plasma cell numbers detected in the blood at the peak response after secondary immunisation. The detection and quantification of plasma cells following an mmunisation/vaccination strategy could constitute a very effective means for predicting the magnitude and longevity of an Ab response.  相似文献   

Effect of Qidan on the expression of transforming growth factor-β1 an d tumor necrosis factor-α in a rat model of bleomycin-induced pulmonary fibros is     

JIN Chang-jun  XIN Hong-tao  LIN Dian-jie  MU Xiao-yan  XV Shao-hua  WA NG Zhen 《园艺学报》2006,22(4):814-817

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高寒草甸草地水、土、草中氮硫含量冷暖季节的变化   总被引：3，自引：0，他引：3  

罗海玲  黄有德  张尤嘉  张英俊  颜生林  肖西山  李成魁  王玲英  王芳霞 《草业科学》2001,18(4):39-42,45

根据青海高原特殊的气候分布特征，把高寒草甸草地绵羊放牧地划分为冷季和暖季。通过测定冷暖绵羊放牧地水、土壤、牧草中氮和硫含量的结果表明：水、土壤、牧草中氮和硫的含量暖季＞冷季（P＜0．05），其中地表水冷季含硫量分别为3．7mg/kg、5.1mg/kg，水中没有检测到氮；牧草中硫含量冷暖季分别为2952mg/kg,3262mg/kg，差异显著（P＜0．05）；牧草中氮含量冷暖季分别为0．62％、1．36％，差异显著（P＜0．05）；土壤氮含量冷暖季分别为0．22％、0．285％，差异显著（P＜0．05）；硫含量冷暖季分别为0．24％、0．37％。  相似文献   

Toxocara and public health.     

W A Charleston 《New Zealand veterinary journal》1977,25(7):171-172

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Use of colostrum from rotavirus-immunised cows as a single feed to prevent rotavirus-induced diarrhoea in calves     

Le Rousic S  Klein N  Houghton S  Charleston B 《The Veterinary record》2000,147(6):160-161

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A model for study of lungworm (Dictyocaulus sp.) and gastrointestinal nematode infection in young red deer (Cervus elaphus)     

Hoskin SO  Wilson PR  Charleston WA  Barry TN 《Veterinary parasitology》2000,88(3-4):199-217

A model of sub-clinical parasitism in young red deer, using concurrent trickle infections of lungworm (Dictyocaulus sp.) and mixed gastro-intestinal (GI) nematodes of deer-origin was evaluated. 20 parasite-free deer calves were artificially reared indoors from 4 days of age. A further five calves were naturally reared on pasture with their dams, treated with anthelmintic and brought indoors at 3-4 months. At 4-4.5 months of age they were individually housed and allocated to five groups (n=5). Groups were dosed 3 x per week, for 9 weeks with 0, 100 and 500, 200 and 1000 (2 groups), 400 and 2000 infective larvae of lungworm and mixed GI nematodes, respectively, cultured from deer faeces. Liveweight and voluntary feed intake measurements and faecal and blood samples were taken weekly. In the fourth week following cessation of trickle infection, deer were euthanased and lung and GI nematodes recovered. Both lungworm and GI nematode infections became patent at Week 4 of infection. Maximum group arithmetic mean faecal egg counts were 100-190 epg. Maximum group arithmetic mean faecal lungworm larval counts were 58-123 lpg. Group arithmetic mean nematode counts at slaughter ranged from 439-806 for GI nematodes and 31-73 for lungworm, respectively. Despite low nematode counts, reduced liveweight gain, voluntary feed intake and serum albumin concentration, elevated serum pepsinogen, gastrin and globulin concentrations and elevated peripheral eosinophil counts and slight haemoconcentration, but no clinical signs, were observed. The reduction in liveweight gain was related to the reduction in voluntary feed intake (r2=0.83; p<0.088). Naturally-reared deer had similar liveweight gains, voluntary feed intake and nematode counts to artificially-reared deer. Thus, methods of infection to produce concurrent sub-clinical lungworm and GI nematode burdens for study of sub-clinical parasitism in young deer have been defined.  相似文献