196,143 research outputs found
Monitoring udder health status using somatic cell counts in Iranian Holstein-Friesian dairy cows
No full textThe present study was performed to provide update information about udder health as determined by SCC in Iranian Holstein-Friesian dairy cattle, and to compare results with herds under a mastitis control program. A total of 17,990 monthly test-day records from 1,663 Holstein dairy cattle in 10 commercial dairy herds (“regular herds”) and 2,389 test-day records from 386 Holstein dairy cattle from 2 herds that were assigned to the 10-point mastitis control program (“controlled mastitis herds”) were included in the analysis. Each test-day record comprised the date of recording, daily milk production (kg), fat and protein yields (%), days in milk at date of recording, parity and SCC. Median (Q1–Q3) SCC×103 for “regular” and “controlled mastitis herds” was 136 (52–391) and 64 (24–204) cells/mL, and the percentage of records containing SCC > 200,000 cells/mL (elevated SCC) was 40.3 and 25.5%, respectively (P 40 kg of daily milk yield had lower odds of an elevated SCCs (P < 0.001). Also, the odds of an elevated SCC were lower in milk records taken in the summer and autumn than those taken in the winter (P < 0.05). The results demonstrated that udder health has been improved in Iranian Holstein dairy cattle over recent decade. There is some evidence that national mastitis control programs could support dairy producers in reaching a standard level. Host and environmental characteristics should be considered for the interpretation of SCC results
Monitoring udder health status using somatic cell counts in Iranian Holstein-Friesian dairy cows
No full textThe present study was performed to provide update information about udder health as determined by SCC in Iranian Holstein-Friesian dairy cattle, and to compare results with herds under a mastitis control program
Monitoring udder health status using somatic cell counts in Iranian Holstein-Friesian dairy cows
No full textThe present study was performed to provide update information about udder health as determined by SCC in Iranian Holstein-Friesian dairy cattle, and to compare results with herds under a mastitis control program. A total of 17,990 monthly test-day records from 1,663 Holstein dairy cattle in 10 commercial dairy herds (“regular herds”) and 2,389 test-day records from 386 Holstein dairy cattle from 2 herds that were assigned to the 10-point mastitis control program (“controlled mastitis herds”) were included in the analysis. Each test-day record comprised the date of recording, daily milk production (kg), fat and protein yields (%), days in milk at date of recording, parity and SCC. Median (Q1–Q3) SCC×103 for “regular” and “controlled mastitis herds” was 136 (52–391) and 64 (24–204) cells/mL, and the percentage of records containing SCC > 200,000 cells/mL (elevated SCC) was 40.3 and 25.5%, respectively (P 40 kg of daily milk yield had lower odds of an elevated SCCs (P < 0.001). Also, the odds of an elevated SCC were lower in milk records taken in the summer and autumn than those taken in the winter (P < 0.05). The results demonstrated that udder health has been improved in Iranian Holstein dairy cattle over recent decade. There is some evidence that national mastitis control programs could support dairy producers in reaching a standard level. Host and environmental characteristics should be considered for the interpretation of SCC results
Self-assembly of three cationic silver(I) coordination networks with flexible bis(pyrazolyl)-based linkers
No full textThree new cationic silver(I) coordination polymers, {[Ag(mu-bpmb)](SO3CF3)}n (1), {[Ag(mu-bdb)1.5] (SO3CF3)}n (2) and {[Ag(mu-bpb)2](NO3)}n (3), with flexible 1,4-bis[(pyrazolyl)methyl]benzene (bpmb), 1,4-bis[(3,5-dimethylpyrazolyl)methyl]benzene (bdb), and 1,4-bis(pyrazolyl)butane (bpb) have been prepared at room temperature by the solvent layering method. The three compounds were characterized by FT-IR spectroscopy, PXRD, elemental analyses and single-crystal X-ray diffraction. Compound 1 is a highly undulated polymeric 1D chain in which the silver ions adopt a linear geometry, coordinating two bpmb linkers. Compounds 2 and 3 are both 2D coordination polymers with their silver atoms being three and four coordinated, and resulting in 6^3-hcb and 4^4-sql underlying net topologies, respectively. The flexible bispyrazolyl ligands display various conformations in the solid state, causing the formation of different Ag. . .Ag separations in the polymeric structures
Anion-directed assembly of three cationic silver(I) coordination polymers with bis(imidazolyl)-based linker: Structural characterization and anion exchange study
No full textThree cationic silver(I) coordination polymers, namely [Ag2(μ-bib)3](SO3CF3)2·(CH3CN)n (1), [Ag(μ-bib)](NO3)·(H2O)n (2), and [Ag(μ-bib)]BF4n (3), have been prepared using flexible bis(imidazolyl)butane (bib) ligand and silver salts of different anions. All compounds are characterized by FT-IR, PXRD, elemental analysis, and single-crystal X-ray diffraction. Compound 1, containing triflate (SO3CF3−) anions, exhibits a two dimensional 63-hcb network with an amazing ABCDEF packing mode of the single hexagonal layers. Compound 2, containing nitrate ions, forms a simple one dimensional wavy chain, while compound 3 with BF4− anions, shows a double helix DNA-shaped structure stabilized by Ag⋯Ag interactions between the two strands. The anions in the structures 1–3 are non-coordinating and participate in weak H-bonding, while imidazolyl rings are involved in π⋯π stacking interactions. Anion exchange experiments in aqueous solution, monitored by FT-IR and PXRD analyses, reveal interesting structural transformations
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
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