国家林业局工作组赴吉林、黑龙江检查森林防火工作情况的报告     

赴吉林 《森林防火》2007,(2):1-3

2007年5月13~23日,在全国政协委员、国家森林防火指挥部森林防火专家组组长、国家林业局原副局长马福同志带领下,我们一行4人对吉林和黑龙江省2007年春季森林防火工作进行了检查调研。在检查过程中,针对当前森林防火形势、防  相似文献   

我院生物技术专业学生就业工作的实践与思考     

丁立群  崔颂英  刘景芳 《辽宁农业职业技术学院学报》2002,4(4):50-51

就业率是学校办学方向、办学质量、办学效益的最直接反映.在大学生整体就业形势严峻的今天,高职毕业生就业工作更是至关重要,已经关系到学校的生存和发展.本文通过对农业实用生物技术专业就业工作的实践与思考,讨论了高职毕业生的就业教育工作.  相似文献   

Continued freedom from blue-tongue virus infection in cattle and sheep in Western Australia south of latitude 26° S     

TM ELLIS  R. TURNOR  TT NGUYEN  U. TARNOWSKI 《Australian veterinary journal》1996,74(4):317-319

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Hunting behavior of a marine mammal beneath the antarctic fast Ice   总被引：1，自引：0，他引：1  

RW Davis  LA Fuiman  TM Williams  SO Collier  WP Hagey  SB Kanatous  S Kohin  M Horning 《Science (New York, N.Y.)》1999,283(5404):993-996

The hunting behavior of a marine mammal was studied beneath the Antarctic fast ice with an animal-borne video system and data recorder. Weddell seals stalked large Antarctic cod and the smaller subice fish Pagothenia borchgrevinki, often with the under-ice surface for backlighting, which implies that vision is important for hunting. They approached to within centimeters of cod without startling the fish. Seals flushed P. borchgrevinki by blowing air into subice crevices or pursued them into the platelet ice. These observations highlight the broad range of insights that are possible with simultaneous recordings of video, audio, three-dimensional dive paths, and locomotor effort.  相似文献   

Pulmonary Maturation in Canine Foetuses From Early Pregnancy to Parturition     

TM Sipriani  F Grandi  LCG da Silva  PC Maiorka  CI Vannucchi 《Reproduction in domestic animals》2009,44(S2):137-140

Development of the foetal respiratory system includes both pulmonary growth and maturation. In human medicine, a higher incidence of respiratory distress is reported in newborn males. This study aimed to identify different phases of canine foetal lung maturation throughout pregnancy, to determine the stage of pregnancy in which surfactant production begins and to compare pulmonary development of male and female foetuses. Pregnant bitches (34) were subjected to elective ovariohysterectomy and allocated into four groups, according to the stage of pregnancy: 30–40 days of pregnancy (n = 10), 41–50 days (n = 10), 51–60 days (n = 10) and bitches in the first stage of parturition (n = 4). Foetal lungs were histologically processed and evaluated by optical microscopy. The pseudoglandular phase was identified between the 35th day and 46th day of gestation; the onset of canalicular and saccular periods was observed, respectively, from the 48th day and 60th day of pregnancy. Lungs from foetuses at term were in the saccular phase; thus, the development into the alveolar period occurs in the neonatal period. The histological analyses revealed that respiratory tract development is centrifugal, from upper to lower airways. Therefore, it is possible to identify distinct development periods in different portions of the same organ. In conclusion, the saccular phase of lung development begins around 57 and 60 days of pregnancy, the period in which surfactant production is believed to occur. Male and female foetuses present similar pulmonary development from early pregnancy until parturition.  相似文献   

Identification of CD3+ T lymphocytes in the green turtle Chelonia mydas     

Fernando A. Muoz  Sergio Estrada-Parra  Andres Romero-Rojas  Thierry M. Work  Erik Gonzalez-Ballesteros  Iris Estrada-Garcia 《Veterinary immunology and immunopathology》2009,131(3-4):211-217

To understand the role of the immune system with respect to disease in reptiles, there is the need to develop tools to assess the host's immune response. An important tool is the development of molecular markers to identify immune cells, and these are limited for reptiles. We developed a technique for the cryopreservation of peripheral blood mononuclear cells and showed that a commercially available anti-CD3 epsilon chain antibody detects a subpopulation of CD3 positive peripheral blood lymphocytes in the marine turtle Chelonia mydas. In the thymus and in skin inoculated with phytohemagglutinin, the same antibody showed the classical staining pattern observed in mammals and birds. For Western blot, the anti-CD3 antibodies identified a 17.6 kDa band in membrane proteins of peripheral blood mononuclear cell compatible in weight to previously described CD3 molecules. This is the first demostration of CD3+ cells in reptiles using specific antibodies.  相似文献   

Estimating Crop Coefficient in Intermittent Irrigation Paddy Fields Using Excel Solver     

Chusnul ARIF  Budi Indra SETIAWAN  Hanhan Ahmad SOFIYUDDIN  Lolly Martina MARTIEF  Masaru MIZOGUCHI  Ryoichi DOI 《水稻科学》2012,19(2):143-152

The current study proposes a novel method using Excel Solver to estimate,from limited data,crop coefficient(Kc) in paddy fields under intermittent irrigation(II).The proposed method was examined in a field experiment conducted at Karang Sari Village,Bekasi,West Java,Indonesia during the first rice season of 2007/2008(December 2007 to April 2008) in the rainy season.As the control,continuous flooding irrigation(CF) was applied to the conventional rice cultivation fields.Based on the observed water storage,Excel Solver was used to estimate crop evapotranspiration.Estimated crop evapotranspiration was used to compute Kc value,then the average Kc values at each growth stage were compared with that for the CF treatment.The estimation method was evaluated by comparing estimated crop evapotranspiration and the crop evapotranspiration derived by the well established FAO procedure.Excel Solver estimated crop evapotranspiration accurately with R2 values higher than 0.81.Accordingly,more than 81% of the FAO crop evapotranspiration was described by the proposed method.Thus,Kc value could be well determined from those estimated crop evapotranspiration.Under the II treatment,the average Kc values were 0.70,1.06,1.24 and 1.22 for the initial,crop development,reproductive and late stages,respectively.These values were lower than those under the CF treatment for initial and crop development stages because of a minimal soil evaporation and intense dryness during these stages.However,average Kc values under the II treatment were higher than those under the CF treatment at the reproductive and late stages,indicating that the II treatment promoted more plant activity particularly for dry biomass production as indicated by a greater number of tillers per hill.  相似文献   

Report of The Site Selection Committee to the PAA Business Meeting Wednesday July 27, 1994     

Brian L. Rex  Joe Sieczka  Alexander Pavlista  Duane Preston  Pete Weingartner  Robert O’Keefe  Jonathon Whitworth  Chesley E. Smith  Rob Davidson  Gregory Porter  Dan Hane  Terry Work 《American Journal of Potato Research》1994,71(11):782-794

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The Potato Association of America 75th Annual Meeting Spokane,Washington, U.S.A.     

David Curwen  Pete Weingartner  Ronald Knight  Therese M. Work  Hugh J. Murphy  Steven B. Johnson  Richard Zink  Leigh Morrow  A. R. Mosley  Rod Davidson  Thoms Owings  Don Halseth  John Bamberg  John C. Wallace  Stephen Love  Don Halseth  Elmer E. Ewing  LaMont Anderson  Neil Gudmestad  Oscar Malamud  Jane Seabrook  Robert E. Thornton  Ronald Voss  A. J. Mosley 《American Journal of Potato Research》1991,68(12):861-902

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Association Business     

David Curwen  Ronald Knight  Therese M. Work  Hugh J. Murphy  Pete Weingartner  John Ojala  Gary Franc  Roger Brook  Tom German  Sam Thorton  John Bamberg  John C. Wallace  Creighton Miller  Brian Rex  J. Laganiére  Susan M. Paradis 《American Journal of Potato Research》1993,70(2):147-179

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