Evaluation of the efficacy of tulathromycin as a metaphylactic antimicrobial in feedlot calves     

Booker CW  Abutarbush SM  Schunicht OC  Jim GK  Perrett T  Wildman BK  Guichon PT  Pittman TJ  Jones C  Pollock CM 《Veterinary therapeutics : research in applied veterinary medicine》2007,8(3):183-200

The purpose of this study was to determine the efficacy and cost-effectiveness of tulathromycin (DRAX) versus tilmicosin (MIC) or oxytetracycline (TET) as a metaphylactic antimicrobial in feedlot calves. Calves that received DRAX had significantly (P<.05) lower initial undifferentiated fever (UF) treatment and relapse rates; lower overall chronicity, overall mortality, and cause-specific mortality rates; higher average daily gains; and improved quality grades. However, calves that received DRAX also had poorer (P<.05) yield grades compared with calves that received MIC or TET and worse feed conversion compared with calves that received MIC. Net advantages in the DRAX group were 3.79CanDollars/animal and 16.96CanDollars/animal compared with the MIC and TET groups, respectively. Based on these results, DRAX is a more efficacious and cost-effective metaphylactic antimicrobial than MIC or TET in feedlot calves at ultra-high risk of developing UF. In addition, this study presents a comparison between two methods ("deads out" and "deads in") of calculating feedlot performance variables.  相似文献   

A hydraulic press for extracting fluids from plant tissue samples     

Calvin H. Pearson  Donna J. Rath 《Industrial Crops and Products》2009,29(2-3):634-637

In the past, pressing fluids from ground plant matter has typically been accomplished with a hand press. Fluids must be separated from dry matter as part of the methodology for various applications in plant species including latex quantification. This article describes the design and construction of a hydraulic press used for extracting fluids from plant tissue samples, the accompanying press plates, sieve vessels, and collection pan, and the process we use for pressing plant fluids from sunflower (Helianthus annuus) homogenate. The overall height of the press is 205.7 cm (81 in.) and the width is 94.0 cm (37 in.). We have used the press for several years and have not identified any flaws in its design and performance. While designed and constructed for use in latex extraction we envision the press and associated press plates, sieve vessels, and collection pan could be used in a variety of other applications.  相似文献   

Review of Recent literature     

E. V. Hardenburg  WM. Stuart 《American Journal of Potato Research》1928,5(9):274-278

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Notes     

Daniel Dean  WM. Stuart  H. O. Werner 《American Journal of Potato Research》1928,5(9):266-274

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Immunodeficiency associated with multiple concurrent infections in captive Pallas' cats (Otocolobus manul).     

Cornelia J Ketz-Riley  Jerry W Ritchey  John P Hoover  Calvin M Johnson  Michael T Barrie 《Journal of zoo and wildlife medicine》2003,34(3):239-245

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Regional Input-Output Inverse Coefficients Adjusted from National Tables     

BRUCE WM. PIGOZZI  RENE C. HINOJOSA 《Growth and change》1985,16(1):8-12

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Nonemployment Income and the Economic Base of Michigan Counties: 1959–1986     

JOAN KENDALL  BRUCE WM. PIGOZZI 《Growth and change》1994,25(1):51-74

ABSTRACT Despite the fact that nonemployment income makes up approximately one-third of all personal income, its impact on local area economies has not been closely examined. This study uses Michigan county data to examine the impact of nonemployment income on nonbasic income over a twenty-seven-year period. This impact is compared to the impact of basic income by employing regression analysis to estimate comparative multiplier effects for both types of income. Nonemployment income is found to have a significant impact on nonbasic income, particularly in metropolitan and nonmetropolitan urban counties, where its impact appears to be stronger than that of basic income.  相似文献   

The Dark Reductions of Photosynthesis     

Benson A  Calvin M 《Science (New York, N.Y.)》1947,105(2738):648-649

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WILLIAM SPENCER CARTER 1869-1944     

Hendrix BM  Porter EL  Calvin DB  Leake CD 《Science (New York, N.Y.)》1944,100(2586):42-43

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Lunar organic compounds: search and characterization     

Burlingame AL  Calvin M  Han J  Henderson W  Reed W  Simoneit BR 《Science (New York, N.Y.)》1970,167(3918):751-752

The carbon concentration in Apollo 11 lunar fine material is of the order of 200 ppm. By far the largest single amount of this carbon appears to be in carbon monoxide. Some of this seems to be in the form of gas bubbles in the glass spheres, but most of it could be in some complex form other than gas. This result would be consistent with the idea that most of the fines passed through a high temperature and that the carbon was oxidized by mineral oxides at that time.  相似文献