Space Station Cost Estimates Double: A more complete accounting suggests a cost of some $16 billion; even supporters wonder if it is time to think again     

Waldrop MM 《Science (New York, N.Y.)》1987,235(4792):965

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Stumbling on superconductors     

M E  Sun M 《Science (New York, N.Y.)》1987,237(4814):477

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Supernova 1987A: Notes from All Over     

Waldrop MM 《Science (New York, N.Y.)》1987,236(4801):522-523

As Supernova 1987A in the Large Magellanic Cloud continues on its inexorable course-it has currently reached magnitude 3.3, with perhaps another magnitude of brightening to go in the next few months before it begins its long, slow fade into oblivion-astronomers are following its every step with avid interest. Some recent developments:  相似文献   

The enigma of zinc     

Dewes HF  Lowe MD 《New Zealand veterinary journal》1987,35(1-2):16-17

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Thromboembolic meningocephalitis caused by Haemophilus somnus infection in a bull calf-a new disease in New Zealand     

Thompson KG  Vickers MC  Stevenson BJ  Davidson GW 《New Zealand veterinary journal》1987,35(1-2):5-7

Thromboembolic meningoencephalitis (TEME) caused by Huemophilus somnus infection was diagnosed for the first time in New Zealand in an eight month old bull calf. Clinical signs included pyrexia, excessive salivation, recumbency, opisthotonus and rigidity of the front legs. Multiple red, malacic foci (1-10 mm in diameter) were visible grossly on the surface of the cerebrum and cerebellum, and were scattered throughout the brain parenchyma. Histologically these lesions consisted of focal haemorrhage, necrosis and neutrophilic infiltration. Fibrin thrombi and colonies of gram negative bacteria were present in many small blood vessels within necrotic foci. An organism with the morphological and biochemical characteristics of Haemophilus somnus was cultured from the brain. Although TEME is an important disease of feedlot cattle in North America and Europe it is relatively uncommon in cattle grazing pasture and is therefore unlikely to become a major problem in New Zealand.  相似文献   

Isolation of oxfendazole resistant Cooperia oncophora in cattle     

Jackson RA  Townsend KG  Pyke C  Lance DM 《New Zealand veterinary journal》1987,35(11):187-189

A field strain of Cooperia oncophora resistant to oxfendazole was isolated from a commercial cattle rearing property in Waikato, New Zealand. Resistance to oxfendazole was assessed by means of a faecal egg count depression test and an in vitro egg hatch test. This is the first documented case of anthelmintic resistance in Cooperia spp. and the first report of anthelmintic resistance in cattle in New Zealand.  相似文献   

An unusual manifestation of holoprosencephaly in a pig          下载免费PDF全文

Holmes CJ  Partlow GD  Fisher KR 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(12):770-771

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Recovery of Mycoplasma spp. from the Reproductive Tract of the Mare during the Estrous Cycle          下载免费PDF全文

Bermudez V  Miller R  Johnson W  Rosendal S  Ruhnke L 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(8):519-522

The sites in the genital tract from which mycoplasmas could be recovered at various stages of the estrous cycle were studied in five Standardbred mares naturally infected with Mycoplasma. Mycoplasma equigenitalium and Mycoplasma subdolum were most frequently isolated from the clitoral fossa as compared to the vagina, cervix, and uterus. The lowest isolation prevalence was observed in the uterus. The recovery of Mycoplasma spp. from the clitoral fossa did not differ at any stage of the estrous cycle; however, recovery from the vagina, cervix, and uterus was variable during the cycle and more organisms were recovered on the day of ovulation than at any other time. From these results it was concluded that the clitoral fossa is the most likely “ecological niche” for Mycoplasma spp. in the mare. Ureaplasmas were not isolated.  相似文献   

X chromosome mosaicism and infertility in a mare          下载免费PDF全文

Reid SW  Weatherston JF  Robinson BN 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(8):533-534

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Guelph international development consultants          下载免费PDF全文

Howell DG 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(8):546-547

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