高粱科研工作在开拓中前进——第四次全国高粱科研协作会议记实

第四次全国高粱科研协作会议,由辽宁省农科院、山西省农科院主持,于1986年2月27日至3月2日在沈阳召开。参加会议的有来自中国农科院、中国科学院遗传所、水保所及14个省市(自治区)的46个科研、教学、生产和管理部门的代表84人。中国农科院任志副院长出席了会议,并讲了话。“六五”期间,由于农村产业结构和种植业结构的调整,全国高粱种植面积比前一个五年计划年均减少了24.2％,年均单产从149公斤上升到187.5公斤,总产量保持平衡。随着     

亚洲国家高粱的生产和科研现状（综述）

高粱是世界干旱、半干旱地区重要的粮食作物和饲料作物。全球高粱种植面积约4500万公顷,排在小麦(220.7万公顷)、水稻(141.1万公顷)、玉米(127.6万公顷)和大麦(78.7万公顷)之后,为第五位禾谷类作物。总产量每年约6200万吨。一.亚洲国家高粱生产现状高粱种植面积的80％分布在亚洲、非洲和拉丁美洲的发展中国家,其中亚洲占一半(1924.1万公顷);其次是非洲(1755.6万公     

Examination of the origin of increased equine serum alkaline phosphatase concentrations

Serum alkaline phosphatase activity was found to be increased in 32.6% of equine samples analyzed at the Ontario Veterinary College over an 18 month period. An attempt was made using sensitivity to L-phenylalanine and heat to identify the origin of increased serum alkaline phosphatase isoenzymes present in 44 clinical cases. No difference in sensitivity to either procedure was observed for serum alkaline phosphatase from groups of foals and horses representing different clinical problems. Alkaline phosphatase of osseous tissue origin appeared to be the major source of activity for each group of animals reported.     

Diagnostic use of cytologic examination of bone marrow from dogs with thrombocytopenia: 58 cases (1994-2004)

OBJECTIVE: To determine the diagnostic use of cytologic examination of bone marrow from dogs with thrombocytopenia. DESIGN: Retrospective case series. ANIMALS: 58 dogs with thrombocytopenia. PROCEDURES: Medical records were searched and reviewed for dogs with thrombocytopenia. Dogs that had thrombocytopenia and cytologic examination of bone marrow were included in the study. Dogs with other hematologic abnormalities, with a previous diagnosis of hematopoietic neoplasia, or that had previous treatment with cytotoxic drugs were excluded. Bone marrow cytologic findings were reviewed. Results were compared between dogs with severe thrombocytopenia (< 20,000 platelets/microL) and dogs with mild to moderate thrombocytopenia (20,000 to 200,000 platelets/microL). RESULTS: 58 dogs met the inclusion criteria. Of 55 dogs with diagnostic bone marrow aspirates, 36 had severe thrombocytopenia. Cytologic evaluation of bone marrow did not reveal substantial nonmegakaryocytic bone marrow abnormalities or result in a definitive diagnosis in any of these dogs. Nineteen dogs with mild to moderate thrombocytopenia had diagnostic bone marrow aspirates. Bone marrow cytologic findings revealed nonmegakaryocytic abnormalities in 4 of these dogs. Significantly fewer dogs with severe thrombocytopenia had abnormalities identified on cytologic examination of bone marrow, compared with dogs with mild to moderate thrombocytopenia. CONCLUSIONS AND CLINICAL RELEVANCE: Cytologic examination of bone marrow is unlikely to provide specific diagnostic or prognostic information in dogs with severe thrombocytopenia.     

Synchronizing rock clocks of Earth history

Calibration of the geological time scale is achieved by independent radioisotopic and astronomical dating, but these techniques yield discrepancies of approximately 1.0% or more, limiting our ability to reconstruct Earth history. To overcome this fundamental setback, we compared astronomical and 40Ar/39Ar ages of tephras in marine deposits in Morocco to calibrate the age of Fish Canyon sanidine, the most widely used standard in 40Ar/39Ar geochronology. This calibration results in a more precise older age of 28.201 +/- 0.046 million years ago (Ma) and reduces the 40Ar/39Ar method's absolute uncertainty from approximately 2.5 to 0.25%. In addition, this calibration provides tight constraints for the astronomical tuning of pre-Neogene successions, resulting in a mutually consistent age of approximately 65.95 Ma for the Cretaceous/Tertiary boundary.     

试论我国高粱产业发展——五论高粱产业发展的科技支撑

高粱产业门类多，发展潜力大。为加快其发展速度，需加大相关研究的力度，以便为产业发展提供科技支撑。作为高粱产业的源头——高粱新品种选育至关重要，因为不同高粱产业需要不同的专用品种，这就要求育种单位不断选育出符合各种产业需求的品种来。与此同时，还要加强其高产栽培技术的研究和应用，为产业发展提供充足的原料。此外，还要研究和解决相关产业发展中的瓶颈技术问题，使产业发展不断提升水平。