B-cell immunoblastic lymphoma with multinucleated giant cells in a cat     

Ohshima M  Morita T  Sawada M  Shimada A  Kobayashi H  Sawashima K 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2004,66(2):189-191

A 10-year-old male mixed breed cat died after six months history of intermittent vomiting and weight loss. At necropsy, large white-colored foci were found in both kidneys, and whitish thickening of the gastric wall was present at the pyloric part of the stomach. Histopathological examination revealed that both lesions consisted of proliferation of large-sized neoplastic lymphocytes intermingled with multinucleated giant cells. Immunohistochemically, the neoplastic cells were positive for both B-cell antigen receptor complex (CD 79 alpha cy) and MHC class II, although multinucleated giant cells were negative. The present case was diagnosed as B-cell immunoblastic lymphoma with multinucleated giant cells.  相似文献   

Ribavirin, a nucleoside with potential insecticidal activity     

Liu YQ  Zhang J  Feng G  Li LH  Yang L  Kou L 《Pest management science》2012,68(10):1400-1404

BACKGROUND: The triazole-based antiviral nucleoside ribavirin exhibited significant in vitro insecticidal effects against Spodoptera litura, a finding that has prompted further investigations into its in vivo insecticidal properties and mode of action against this insect pest. RESULTS: Ribavirin showed delayed insecticidal effects on third-instar larvae of S. litura at a concentration of 1 mg mL⁻¹. When incorporated into an artificial diet, ribavirin caused various effects, depending on the concentration used. Compared with controls, food intake was lower, larval growth was reduced and larval development prolonged. Pupae weight was reduced, and adult morphology was also affected. Relative to the untreated group, treated groups showed higher mortality at larval and pupal stages, which was generally caused by moult disruption. Results of this study with ribavirin resemble those found in treatment with insect growth regulators. CONCLUSION: This work shows that ribavirin merits further study as a lead compound in a novel class of potential insect control agents or for managing field populations of Lepidoptera pests on cruciferous crops. Copyright © 2012 Society of Chemical Industry  相似文献   

广元市食用菌生产现状及发展对策     

王正前  寇枭 《中国林副特产》2013,(1):87-89

广元市属食用菌重点产区,但存在产量低、结构不合理、菌林矛盾突出、龙头企业带动能力弱、菌种管理力度不强等问题。调整菌业结构、加大科研投入、培植新的增长点,强化品牌建设,提高食用菌产品附加值,实现规模化、标准化栽培是发展壮大广元市食用菌产业的必由之路。  相似文献   

Selection of In Vitro-Matured Porcine Oocytes Based on Localization Patterns of Lipid Droplets to Evaluate Developmental Competence     

Kou HIRAGA  Yumi HOSHINO  Kentaro TANEMURA  Eimei SATO 《The Journal of reproduction and development》2013,59(4):405-408

Localization patterns of lipid droplets in the cytoplasm of porcine oocytes were evaluated as a novel marker for in vitro maturation (IVM) of oocytes with high developmental competence. Porcine oocytes were cultured in TCM-199, which is a complete synthetic medium, for 44 h at 38.5 C. Localization patterns were divided into 2 classes: lipid droplets localized uniformly in the whole cytoplasm (class I) and those that were centrally located (class II). After IVM in TCM-199, 60% of matured oocytes exhibited the class II pattern. To investigate the relation between the distribution of lipid droplets and the developmental rate of the oocyte, the developmental rates of class I and class II oocytes were compared after in vitro fertilization (IVF). Class II oocytes showed a significantly higher rate of blastocyst development than class I oocytes. These results suggest that porcine oocytes with high developmental competence can be selected based on the localization patterns of lipid droplets.  相似文献   

钢质直齿圆柱齿轮冷精锻技术研究   总被引：6，自引：0，他引：6  

杨慎华  寇淑清  王玉国  付沛福 《农业机械学报》1999,30(6):115-119

系统研究了钢质齿齿圆柱齿轮精锻成形工艺及相关技术,提出了齿形凹模修正设计方法,采用闭式镦挤－约束孔分流两步成形法冷精锻出具有较高精度的钢质直齿圆柱齿轮。  相似文献   

Size‐related oxygen consumption and ammonia excretion of Eurasian perch (Perca fluviatilis L.) reared in a recirculating system     

Vlastimil Stejskal  Jan Kouřil  Olga Valentová  Jitka Hamáčková  Tomáš Policar 《Aquaculture Research》2009,41(1):135-142

Oxygen consumption (OC) and ammonia excretion rates (AE) of perch were measured under commercial‐like conditions (temperature 23.3 °C) in both fed (F) and feed‐deprived groups (D). Measurements were taken in triplicate in six sized batches of perch ranging from 44.8 to 336.2 g. The mean daily OC was 288.3–180.6 mg O₂ kg^?1 h^?1 for group F fish ranging in size from 44.8 to 279.4 g body weight. The mean daily AE expressed as total ammonia nitrogen (TAN) was 13.8–5.2 mg TAN kg^?1 h^?1 in the same groups. Daily peaks of OC in group F perch were observed 6 h after the onset of feeding for each size group with relatively stable values up to the end of feeding. Peaks of daily AE in group F perch were observed 10 h after the onset of feeding in each size group, with a rapid decrease up to 16 h after onset. In group D, OC was 181.1–110.5 mg O₂ kg^?1 h^?1 in the weight range 57.9–336.2 g. The daily mean AE was 1.7–0.5 TAN kg^?1 h^?1 in this group. No dramatic peaks of OC and AE were observed in group D perch.  相似文献   

基于移动4G的株距自适应玉米收割机优化设计     

寇雪梅  杨静宜  崔建弘  汪小志 《农机化研究》2016,(7):70-74

为了提高玉米收割机的株距的自适应能力、降低漏采率、提升工作效率,设计了一种新的株距自适应玉米收割机,大大提高了玉米收割机的作业精度和效率。依据移动4G信号的传播特性,设计了玉米株距实时测量系统,针对中国4G现场测试环境,研究提出了一种电波传播特性测量与建模方法,结合高性能测试仪器和虚拟仪器技术设计构建了3.5GHz测量系统。测量得到的株距量由A/D转换器转换为数字信号,再由单片机进行处理,对执行末端发出指令,调整玉米收割机割台分禾器的间距,从而可以对不同株距的玉米进行收割作业。对设计的玉米收割机进行测试发现:其株距自适应能力较好,可以随株距的变化自动调整分禾器间距,玉米穗的漏采率和破碎率较低,符合高精度作业玉米收割机的设计要求,为玉米自动化收割机械装置的研究提供了较有价值的参考。  相似文献   

生长调节剂对板栗结实情况和果实品质的影响     

寇艳茹  苏淑钗 《中国农学通报》2015,31(16):83-87

为了降低板栗空苞率和提高板栗果实品质,寻求合适的喷施生长调节剂的方法。以‘遵玉’为试材,于不同时期对板栗喷施不同的生长调节剂,探究生长调节剂对板栗结实情况和果实品质的影响。结果表明：盛花始期喷施SA可显著提高板栗实蓬率、每苞中板栗的个数和可溶性糖、淀粉和蛋白质含量,其中以0.2 nmol/L效果最佳,相比于对照组分别提高了15.50%、79.64%、19.20%、11.20%和6.09%;板栗幼胚发育前喷施0.01 mg/L BR可显著提高板栗实蓬率、可溶性糖和蛋白质含量,分别提高了14.16%、26.37%和5.69%,而喷施0.001 mg/L BR可显著提高板栗实蓬率和每苞中板栗的个数,分别提高了19.42%和125.56%,其中每苞坚果个数增幅高达125.56%,可显著提高板栗产量。因此,建议于板栗盛花始期喷施0.2 nmol/L SA,于幼胚发育前喷施0.001 mg/L BR或0.01 mg/L BR,以提高板栗产量和品质。  相似文献   

甘肃省玉米制种竞争力分析及可持续发展对策   总被引：4，自引：2，他引：2  

周玉乾  寇思荣 《中国种业》2009,(11):14-16

在分析甘肃省玉米制种竞争力的基础上,结合该省的实际情况,对发展玉米制种提出几点建议对策：鼓励企业加强基础设施建设;加大企业改革力度;加强政策引导,规范管理提升企业竞争力;加强玉米制种技术集成;探索产业化经营模式;加快建立市场销售网络体系,提高市场占有率。  相似文献   

籼粳稻细胞质背景下Rf-1位点PCR标记的遗传分离   总被引：3，自引：3，他引：0  

王石华  谭亚玲  谭学林  文建成  寇姝燕  金寿林  洪汝科 《分子植物育种》2009,7(3)

本文在籼、粳稻细胞质背景下研究了Rf-1位点上PCR标记M45461的遗传分离比例,结果显示M45461的遗传分离与提供雄配子的杂合体的细胞质背景有关.粳稻细胞质不影响M45461的遗传分离比例,而籼稻细胞质会导致M45461极显著偏向籼稻或具有籼稻遗传成分较重的亲本.在籼、粳稻细胞质背景下,杂合体的花粉育性分别为半不育和正常可育,而小穗育性均正常.说明M45461的偏分离与雄配子选择有关,而与雌配子关系不大.该结果还揭示粳稻细胞质可以与籼稻细胞核和谐共存,籼稻细胞质则与粳稻细胞核存在不谐和的遗传互作.这一结论可以为籼粳分化的研究提供一些参考,也可为籼粳杂交父母本选择提供参考.  相似文献