Simulation of the intake and partition of nutrients by the dairy cow: Part I — Management control in the dairy enterprise; philosophy and general model construction     

A. C. Bywater  J. B. Dent 《Agricultural Systems》1976,1(4):245-260

The development of management control techniques for the dairy derd is discussed in this paper in relation to the rationale behind the construction of a detailed model of milk production in the individual cow. The movement towards a more flexible and individualised basis for predicting yield, which does not depend on historical records or standard energy systems, is highlighted.The overall concept and approach of the model are set out and the control aspects and structural framework of the program explained. Subsequent papers in the series will deal in more detail with the major sections of the program in order to illustrate how the mechanisms of the model actually operate and to provide results and an account of the validation procedure.  相似文献   

Reviews section     

Dr Bill Symondson  W. O. C. Symondson  Dr Peter McEwen  Simon Oxley  Dr Patthumal Beevi  Houston Hobbs  Keith Harris  Dr R. T. Plumb  Professor P. G. Mantle  Professor J. Hemingway  Dr Barbara B. Shew  R. M. Baker  Professor P. A. Langley  David Dent 《Integrated Pest Management Reviews》1996,1(2):111-123

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ADVANCE NOTE ON RESEARCH     

B. F. Bland  J. W. Dent 《Grass and Forage Science》1962,17(2):157-158

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Collaborative study of the extraction of light filth from canned whole shrimp     

R G Dent 《Journal of the Association of Official Analytical Chemists》1974,57(3):691-692

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Collaborative study of the extraction of light filth from canned whole and cream style corn     

R G Dent 《Journal of the Association of Official Analytical Chemists》1973,56(3):634-636

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Collaborative study of a new method for the extraction of light filth from black and white ground pepper     

R G Dent  P M Brickey 《Journal of the Association of Official Analytical Chemists》1972,55(1):83-84

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In vivo activation of the p53 pathway by small-molecule antagonists of MDM2     

Vassilev LT  Vu BT  Graves B  Carvajal D  Podlaski F  Filipovic Z  Kong N  Kammlott U  Lukacs C  Klein C  Fotouhi N  Liu EA 《Science (New York, N.Y.)》2004,303(5659):844-848

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Evaluation of some Methods for Fish Canning Wastewater Treatment     

Fahim  Fawzia A.  Fleita  Daisy H.  Ibrahim  Abdallah M.  El-Dars  Farida M. S. 《Water, air, and soil pollution》2001,127(1-4):205-226

A fish canning facility processes 1900–2000 tons of mackerel and sardine annually at arate of 10–15 tons per day for a total of 200 days yr^-1. This factory generates an average of 20 m³ of industrial wastewaters per day. The objective of our study, which was carried out on a bimonthly basisfrom December 1995 to November 1996, was to determine the overall pollutant load associated with this effluent in relation to the applicable Egyptian Standards and to propose methods for pollutant load reduction before discharging it to the local sewer. The methods were to benefit through the recovery of wasted organic load and transform it into an environmentally safe residue amenable for either immediate reuse or final disposal thereafter. Five chemical coagulation/flocculation treatments were tried using ferric chloride, alum, lime, ferric chloride and lime, and alum and lime. The best method involved the use of FeCl₃ and Ca(OH)₂ (0.4 g Fe L^-1 and 0.2 g Ca L^-1, respectively) which reduced the average influent BOD₅ from 989 to 204 mg L^-1, the COD from 1324 to 320 mg L^-1, TSS from 4485 to 206 mg L^-1, total protein content from 812 to 66 mg L^-1 and oil and grease from 320 to 66 mg L^-1. The separated dried precipitate averaged 50 g L^-1 which was found to contain 40% by weight recovered protein and 20% recovered fat. The solid was ideal for on-site reprocessing as animal feed. As well, the final effluent, if not discharged to the area sewer, was safe for controlled use in some irrigation applications or forestry projects at the desert area surrounding the factory.  相似文献   

Investigating scent marking in dogs     

Berthoud D 《The Veterinary record》2006,158(16):572

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Immunoblotting, ELISA and culture evidence for Chlamydiaceae in sows on 258 Belgian farms     

Vanrompay D  Geens T  Desplanques A  Hoang TQ  De Vos L  Van Loock M  Huyck E  Mirry C  Cox E 《Veterinary microbiology》2004,99(1):59-66

The prevalence of Chlamydiaceae infections on 258 closed pig breeding farms in Belgium was examined. For this purpose, 258 farms were randomly selected in the provinces West-Vlaanderen (44%), Oost-Vlaanderen (20%), Antwerpen (10%) and Vlaams-Brabant (6%). Of all farms examined, 96.5% were positive for Chlamydia-specific antibodies in ELISA and most were moderately to strongly positive. ELISA results revealed only 9 (3.5%) sero-negative farms. None of the ELISA negative sera reacted in immunoblotting. Only 212 of 249 ELISA positive sera reacted positive in immunoblotting. Additionally, 23 autopsy samples were examined by isolation in Vero cells. The major outer membrane sequence of the one isolate obtained showed 98.6% amino acid homology to the one of Chlamydophila psittaci strain CP3, formerly isolated from a pigeon. Present observations indicate that chlamydial infections are nearly endemic in the Belgian pig population and that Belgian pigs can become infected with C. psittaci. Nevertheless, the role and significance of Chlamydiaceae as pathogens in pigs remain unsolved and require further investigation.  相似文献