农作物抗旱性鉴定仪的研制和应用     

陈毓荃  王志常  王志辉  兰晓纪 《西北农业学报》1997,6(3):92-95

依据陈毓荃等首次提出的连续升温电导法，研制了ＮＫＪ－１型农作物抗旱性鉴定仪，对１４种小麦抗旱性的鉴定结果与田间观测结果一致，也适于果树抗热性鉴定。  相似文献   

Manoalide derivatives from a marine sponge Luffariella sp. collected in Palau     

Michio  NAMIKOSHI  Shigeo  SUZUKI  Shiori  MEGURO  Hiroshi  NAGAI  Yoshio  KOIKE  Akira  KITAZAWA  Hisayoshi  KOBAYASHI  Taiko  ODA  Junko  YAMADA 《Fisheries Science》2004,70(1):152-158

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In vitro viability of cryopreserved equine embryos following different freezing protocols.          下载免费PDF全文

P Poitras  P Guay  D Vaillancourt  N Zidane    M Bigras-Poulin 《Canadian journal of veterinary research》1994,58(4):235-241

The main objective of this study was to evaluate two freezing protocols and the effect of agar embedding on survival of day 6.5 equine embryos. A total of 133 embryos were used, in one group (n = 51), embryos were first embedded in agar before the freezing protocol was started. A freezing protocol to -30 degrees C or -33 degrees C was used before plunging embryos into liquid nitrogen (LN2). The embryos were thawed in water at 37 degrees C, evaluated and placed in culture. After 24 h culture, the embryos were evaluated for their morphology and development. No differences were observed between embryos plunged at -30 degrees or at -33 degrees C in LN2. The analysis of the morphology and development after thawing showed that the diameter and developmental stage at freezing correlated with embryo survival. Morula and early blastocyst stages of development were associated with better quality after freezing and thawing and had a better potential to survive after in vitro culture (p < 0.05) compared to more advanced stages. The agar failed to protect embryos from zona pellucida damage, but a tendency to prevent rupture was observed in larger embedded embryos.  相似文献   

春制越年家蚕卵乙胚子冷藏方法研究     

古巧珍  王云峰  周占良 《西北农业学报》1996,5(3):69-72

研究结果表明，春制越年家蚕卵丝乙胚子冷藏处理后，其实用孵化率〉９２．３％蚁蚕绝食致半数时数≥１１０ｈ，不良卵发生率〈１０％，发病率〈８．６％，茧质优良，产量平稳，在有效冷藏期限内随时出库催青饲育均安全可靠。  相似文献   

Intestinal adenocarcinomas in two beluga whales (Delphinapterus leucas) from the estuary of the St. Lawrence River.   总被引：1，自引：0，他引：1       下载免费PDF全文

D Martineau  S Lair  S De Guise    P Bland 《The Canadian veterinary journal. La revue veterinaire canadienne》1995,36(9):563-565

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Physiological and morphological changes in bovine mammary glands following intramammary infusion of recombinant interferon-gamma.   总被引：1，自引：0，他引：1       下载免费PDF全文

L M Sordillo  M Snider    L A Babiuk 《Canadian journal of veterinary research》1992,56(1):22-27

Eleven lactating dairy cows were used to evaluate the response of bovine mammary glands to increasing doses of recombinant bovine interferon (rBoIFN)-gamma. Right front and rear quarters were intramammarily infused with eight different doses (10(2) U to 2 x 10(8) U/quarter) of rBoIFN-gamma; each dose was tested in at least two quarters. Left udder halves served as within animal controls in which quarters were injected with a saline placebo or were not infused at all. Milk secretion samples for compositional analysis were collected from each quarter prior to infusion and at 6, 24, 36 and 48 h following infusion. Animals were slaughtered immediately following the 48 h sampling period and mammary tissue was obtained for morphometric analyses. Milk composition was similar between control quarters and those quarters infused with up to 10(5) U of rBo-IFN-gamma during the entire sampling period. Quarters infused with 10(6) U and 10(7) U of rBoIFN-gamma had higher milk somatic cell counts (SCC) following treatment compared with preinfusion values. Changes in the composition of mammary secretion were most dramatic in quarters infused with greater than or equal to 10(8) U of rBoIFN-gamma as indicated by the significant increase in SCC and milk pH with a concomitant decrease in lactose concentration when compared with pre-infusion values or with control quarters. Morphometric analysis of tissue demonstrated an increase in stroma, a decrease in luminal area, and a marked increase in the number of infiltrating leukocytes in those quarters infused with the higher doses of rBoIFN-gamma.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

黄土丘陵区草地生态系统功能的初步研究     

贾恒义  陈国良 《草业科学》1992,9(3):19-22

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Diverticula of the urinary bladder in a juvenile dog.          下载免费PDF全文

A M Remedios  D M Middleton  S L Myers  C A Outerbridge    P M Arnold 《The Canadian veterinary journal. La revue veterinaire canadienne》1994,35(10):648-650

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Expressed sequence tag of Japanese flounder Paralichthys olivaceus skin cells     

Ikuo  HIRONO  Ryosuke  YAZAWA  Takashi  AOKI 《Fisheries Science》2004,70(1):195-197

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Effects of aminoglycoside antibiotics on renal antioxidants, malondialdehyde levels, and some serum biochemical parameters          下载免费PDF全文

Enver Yazar  Muammer Elmas  Vahdettin Altunok  Abdullah Sivrikaya  Esma Oztekin    Yavuz Osman Birdane 《Canadian journal of veterinary research》2003,67(3):239-240

Effects of amikacin, gentamicin, kanamycin, and streptomycin on renal tissue superoxide dismutase, glutathione peroxidase, glutathione and malondialdehyde, serum creatinine, potassium, sodium, total protein, glucose, uric acid, and total bilirubin levels were investigated. All aminoglycoside antibiotics decreased renal tissue glutathione levels.  相似文献