عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
شماره کتابشناسی ملی
شماره
TLpq303629218
زبان اثر
زبان متن نوشتاري يا گفتاري و مانند آن
انگلیسی
عنوان و نام پديدآور
عنوان اصلي
SOME PHYSICAL ASPECTS OF DIGESTION OF FORAGES BY STEERS AND BINDING OF YTTERBIUM AND HAFNIUM AS DIGESTA PARTICLE MARKERS
نام عام مواد
[Thesis]
نام نخستين پديدآور
R. R. Worley
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
Texas A&M University
تاریخ نشرو بخش و غیره
1987
مشخصات ظاهری
نام خاص و کميت اثر
100
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
Ph.D.
کسي که مدرک را اعطا کرده
Texas A&M University
امتياز متن
1987
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
Ingestive and ruminative chewing, meal and dorsal rumen contractions were measured in yearling beef steers offered forage diets based on either Coastal bermudagrass (Cynodon dactylon (L.) Pers) or sorghum X sudan (Sorghum bicolor (L.) Moensch) hays. Diets were supplemented with soybean meal (Glycine max) and/or 3% ammonia. Responses were collected and analyzed by computer programs. Chewing attributes were collected and analyzed as either eating chews or ruminating chews. Criteria for ruminating chews were set forth as 10 to 80 chews at a frequency of >1 chew/2 s, with an intercycle time of 4 to 10 s. Eating chews were the total number of jaw movements-rumination chews. Contractions of the dorsal rumen were measured as deviations in pressure from a baseline established between a balloon located in the dorsal sac of the rumen and external atmospheric pressure. A second series of experiments were conducted to test the binding of ytterbium and hafnium to forage particles and their resistance to displacement by protons at a low pH as might be observed in portions of the gastrointestinal tract. Low levels of binding and resistance to proton displacement were observed for ytterbium. In contrast, binding and resistance of hafnium was higher and resistance to proton displacement was greater than observed for ytterbium. Results of these experiments indicate that hafnium is an excellent candidate as a digesta particle marker. Ytterbium, on the other hand, may have limited possibilities.
موضوع (اسم عام یاعبارت اسمی عام)
موضوع مستند نشده
Biological sciences
موضوع مستند نشده
Livestock
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )
مستند نام اشخاص تاييد نشده
R. R. Worley
دسترسی و محل الکترونیکی
نام الکترونيکي
مطالعه متن کتاب وضعیت انتشار
فرمت انتشار
p
اطلاعات رکورد کتابشناسی
نوع ماده
[Thesis]
کد کاربرگه
276903
اطلاعات دسترسی رکورد
سطح دسترسي
a
تكميل شده
Y
