The association between pupil sizes and blood constituents in cows with parturient paresis          下载免费PDF全文

Fenwick DC 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(5):426-429

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Effects of water deficit on flower opening in coffee (Coffea arabica L.)     

Crisosto CH  Grantz DA  Meinzer FC 《Tree physiology》1992,10(2):127-139

The response of coffee (Coffea arabica L.) floral buds to different water deficits followed by re-irrigation was investigated. Flower opening was stimulated by irrigation after one period of water deficit if predawn leaf water potential declined below -0.8 MPa. Similar stimulation of flowering was observed when less severe but more prolonged water deficits (ca. -0.3 to -0.5 MPa for two weeks) were imposed, even if water deficit was relieved by re-irrigation several times during this period. Consistent results were obtained in the field and in two greenhouse locations. Stimulation of flower opening by water deficit followed by re-irrigation was restricted to buds at the "open white cluster" stage of development (Stage 4). Only buds at this stage exhibited development of secondary xylem. Split-root experiments indicated that a root signal stimulated flower opening, independently of predawn or midday leaf water status. Frequent irrigation to prevent flowering, followed by a controlled water deficit and re-irrigation to stimulate flowering, may represent a practical method to synchronize flowering and shorten the harvest period in leeward coffee production areas in Hawaii.  相似文献   

Response: late permian extinctions     

Wignall PB  Twitchett RJ 《Science (New York, N.Y.)》1996,274(5292):1551b-1552b

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Response: AIDS and ethnicity     

Rosenberg PS 《Science (New York, N.Y.)》1996,271(5255):1480b-1481b

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Tokamak in India     

Kaw PK 《Science (New York, N.Y.)》1996,273(5277):861c

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Whistleblowers not polled     

McCutchen CW 《Science (New York, N.Y.)》1996,271(5257):1793

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Science in china     

Tso TC 《Science (New York, N.Y.)》1996,273(5281):1478b

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Response: programmed cell death     

Ameisen JC 《Science (New York, N.Y.)》1996,274(5284):20c-21c

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Response: does macroscopic quantum coherence occur in ferritin?     

Gider S  Awschalom DD  Divincenzo DP  Loss D 《Science (New York, N.Y.)》1996,272(5260):425-426

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Persistence of salmonella enteritidis in poultry units and poultry food     

R. H. Davies  C. Wray 《British poultry science》1996,37(3):589-596

1. Studies on the survival of Salmonella enteritidis in poultry units and food were carried out over a two‐year period.

2. The organism persisted for at least one year in an empty trial house at the laboratory in which naturally‐infected broiler breeder birds had previously been housed. A similar survival period was seen in a building which had housed an infected layer breeder flock, although infection was not detected in a subsequent pullet flock.

3. Salmonella enteritidis was also frequently found surviving outside poultry houses in small pockets of litter and fan dust which had been left after cleansing and disinfection of the site. On some poultry units S. enteritidis was also found in wild bird droppings.

4. Salmonella contamination appeared to persist preferentially in association with dust particles swept from the floor and in food troughs and S. enteritidis survived at least 26 months in artificially contaminated poultry food.  相似文献