자료유형  

 학위논문

Control Number  

0016931208

International Standard Book Number  

9798380608145

Dewey Decimal Classification Number  

636

Main Entry-Personal Name  

Acharya, Subash.

Publication, Distribution, etc. (Imprint  

[S.l.] : University of Missouri - Columbia., 2022

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2022

Physical Description  

1 online resource(123 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-04, Section: B.

General Note  

Advisor: Brake, Derek.

Dissertation Note  

Thesis (Ph.D.)--University of Missouri - Columbia, 2022.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Summary, Etc.  

요약Small intestinal starch digestion (SISD) in ruminants is limited, but SISD can be improved by postruminal supply of casein or glutamic acid. There are no reports on the effects of increases in SISD in response to greater postgastric nutrient flows from casein or glutamic acid together with cornstarch on energy balance, measures of body composition and fates of luminally assimilated glucose carbon in cattle. Twenty-four steers (BW = 179 ± 4 kg) were duodenally infused with raw cornstarch (1.46 ± 0.04 kg/d) and either 413 ± 7.0 g casein/d, 121 ± 3.6 g glutamic acid/d or water (control). Measures of small intestinal starch digestion and nutrient excretion were collected across 4 d after 42 d of infusion. Measures of energy balance via indirect calorimetry were collected across 2 days after 48 d of infusion, and measures of responses in glucose use for lipid synthesis and splanchnic release of absorbed glucose were determined by continuously infusing stable isotopomers on day 58. Subsequently, cattle were slaughtered and changes in total body nutrient composition were determined by measures of carcass specific gravity. There was tendency of increasing SISD (P = 0.09) when steers were infused with casein treatment and the increase was 26.6% more than that of control. Ileal flow of ethanol-soluble starch (small-chain α-glycosides) increased (P 0.01) with casein infusion compared to control or glutamic acid infusion. Large intestinal starch digestion was similar (P = 0.28) among the treatments. Nitrogen retention was greater (P 0.01) in response to casein compared to control and glutamic acid. With increase in N retention and similar C retention, retained C:N ratio was least (P 0.01) among calves provided casein, compared to glutamic acid or control. Gross energy intake was similar (P = 0.45) among the treatments, while digestible energy was increased (P = 0.03) with casein infusion compared to control and was intermediate to similar with glutamic acid infusion. Similarly, metabolizable energy was increased (P = 0.01) with casein infusion compared to control and glutamic acid infusions. Retained energy tended to increase (P = 0.07) with casein infusion compared to other treatments. The increase in retained energy was 34% more than that of control. Tissue energy was greatest (P = 0.03) among calves provided with casein compared to glutamic acid and control. The majority of increase in tissue energy occurred in fat tissue, where calves provided with casein had greatest (P = 0.02) energy from fat tissues compared to control or glutamic acid. The increase in tissue energy in protein tissue was greatest (P 0.01) for casein compared to glutamic acid and control. Glucose turnover rate, mmol/min was similar (P = 0.17) among treatments, while glucose turnover rate as a function of body weight (mmol/min/MBW) tended (P = 0.15) to be 12% greater among calves provided glutamic acid, compared to casein or control. Consequently, glucose rate of appearance was greatest (P 0.01) among calves provided casein, compared to glutamic acid or control. Palmitate fractional synthesis rate (FSR) from omental fat (P = 0.88) and subcutaneous fat (P = 0.89) were similar among treatments. Palmitate FSR from intramuscular fat tended (P = 0.11) to be greater among calves provided casein, compared to control or glutamic acid infusion.

Subject Added Entry-Topical Term  

Animal sciences.

Subject Added Entry-Topical Term  

Biology.

Subject Added Entry-Topical Term  

Biochemistry.

Index Term-Uncontrolled  

Small intestinal starch digestion

Index Term-Uncontrolled  

Postgastric nutrient

Index Term-Uncontrolled  

Casein

Index Term-Uncontrolled  

Glutamic acid

Index Term-Uncontrolled  

Energy balance

Index Term-Uncontrolled  

Glucose carbon

Added Entry-Corporate Name  

University of Missouri - Columbia Animal Sciences

Host Item Entry  

Dissertations Abstracts International. 85-04B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:640456