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Image 3 of Kentucky farm and home science, vol. 6 No. 3 summer 1960

Part of Kentucky Agricultural Experiment Station

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i ad. Blood Substance _ _ _ . , • Identical tw1n cows used 111 `•~A` A _ study to determine effect of adding · l F E t• materials into blood stream " I°0II1 3 1Il ·»·a- g 2. V By DON DOWDEN and DON R. JACOBSON ruminants are absorbed to some extent as glucose *2* D"’""""’ll'"‘ llf D”l'y S”l”"”” and, to a much greater degree, as volatile fatty acids. l . . . _ _ The Substance either acetic Or Pmpiouic acid is Volatile fatty acids are {produced El the rumen féom ___ normally produced in the cow’s rumen a11d is ab- lh? br€°‘k`dOwn_°f °“lb°l;Y‘ rites, {126 rilmeu ac` F sorbed into the blood stream as an energy source. term ODE pisslbléwiy liwucbt el Gccmg cwtc} » ··~e» Except for this observation, very little is known about may he will hllhd Cfniis lll lla amount" 0 i_ the processes through which food intake is regulated gluC0S€_0r att?] acl S m tw OOD _ " in the dairy COW. Identical twin cows were employed in a ·study A _ , at the Kentucky Agricultural Experiment Station to l Factors such as kind of pasture, temperature, . s . . .. . . determine the efiect of adding several substances . water availability and stage of maturity all affect lll- _ _ . ··v . . . . directly 1nto the blood stream. Glucose, SO(l1ll]ll take but do little to explain how intake 1S regulated. . . . . . g »,_ . . . . . acetate, and acetic, propiomc, butyric, caproic and lac- " HOW thhshh ls Chhholhhl h hl Chhslhlslhhls llhhhlr is acids were i..-mi b - X, ance since economical animal productivity 1nay be _. . 1, ._ Hy . f ,. . , _ . dup to determine tien e ect upon consumption o = nnitec by the amounts and kinds of feed consumed. . cho 1 ned alfalfa ha . All of these substances, or -,», . . . . 1 l Y ‘ \V0rk with laboratory annnals has mdicated that metabolites are ,,0,.,],,,,1,, found in the blood of there ls =l lwllllg Céhlsh lll lhs htm The lead- dairy Cows. In was ma one twin iecavai the _` , mg Center ‘“aY_ mcclve l“€Ssa_g‘?S_ from other Parts metabolite under study in saline, and the other twin W _ of the body which cause it to initiate the act ofeeat- mceivéd Saline Only. The injections were made fo,. ·""' lug Oh Cause the amulal lh Seek food _At Other `mws 8 hours on each of 3 consecutive days. The amounts l »_a lt may mum the animal lh qmt eatmg of hay consumed were obtained daily and for the A lllZ}.jOl` pO1`tlO1l of tl]€ diet of dairy COWS is IllB.Ll(‘ 8-hOul· injection P€I·iOdS_ up of carbohydrates. Carbohydrates in the diet of (C,,,,,,,,,,U,[ 0,, page 8) " V . . 2 l Il •.B‘ wa · L _ . .:,_ » r h — _ ..»;_ i _- .. ...... "m' ‘‘=·i '‘°` ` j' . {V ` . Ai -V A. . . ,.,.._.,,,._. I '`'`’ " ``"`‘ .;,., .V _' V _ 9-) ’ ,,_v> W "__,,_gtg€=i-=i;·a1‘,,::,,;,·.::,It ‘.;,f n T, Y I _. ._ _ _ ` . _. _ ` _ . _ _ _.l { ·;» ._: 3 , ;. 3;;; IC C()\’\ OI] [lll. Ilglli lh l(.(.CI\ Illg d(.(,[lL tl(,l( g H ii ...; 1 if-l ``‘h` ’ '‘-‘ 1 ·ii=¥ Q V ...t in saline by constant drip into the blood , { i _i'" I if ‘..._.._, _,,_:, »,f' » V stream at a rate approximately equal to that », _·»,,°f _ ‘*`: E l]()l`l]lillly absorbed into the blood stream , Q- , I ·, E ~ _ l l . ' » after a heavy meal. 'I`hough [lll! cow is hun- 4* - =‘ V ,,____, ll ‘ 2-};, ,_,_,_, _ v_ 4 _ gry, this material causes her to stop eating. A _y__1___i,_,, __ , . v — ",!`§~ ;‘ m A " '“*~·’i ~ °M °l iil _ _ -` W, The itlentieal twin malt: on (lll: lCi`l g0CS 011 ._.,_ .__,,,,_ ,_,_ ,_ lf, ··ii»=-·’ M ___, - "_ ,_j°·¢°’,;V, eating as though unbothered. She is receiv- U all `‘‘i*i¢'. gill ' ·-.. r ·’`i_ to _. i P ` if ` A in r only saline. The 1ol tethvlene tubin r vis- ••. ,. »· N . i l {,4,..;; i f' , . 5 ’ I ) ‘ fw , '; ···` 5 C = ...`‘° · v _,==·· .···_ · “'"° * ible at the withcrs leads directly to the jugu- , .. A _ , ~ a tm ’`’ . i .. l‘.;.‘ ·¥ e . im vein. KN . — » , i 2f °‘E ’ `V " -_a- ·; > U · - .-.»i " . . .. . :¤L.i ».l” .»» · ,- I ' » A n .·=·‘ . we :=- »=·= . — z. >4· -· X., , J 'z ‘._ __ . _ _ V H g, { ` V _, ` '., ,-_ \ V V L`; · ‘ ‘ nr · t _ ... ; ·· . ._i ._ i , , l * ‘ . 1 g . :3 ~ V .; fst ..·.¢~»1’*’*‘EA zi" `”‘ Z l ` fl " .... , ,, r w _, , _ . . . ; Y ~ Q ;,‘;:..;}p·\t__t iyttza _$, V 3 ‘ · " I V *,4 ·-·_ Hs sa, _. gsi ‘ sa F . . ,5¤ ‘<"·és:.;g,;¤" ’ '_,. mt. _ . V» _ _,_ , ,,,7, . ._ r. V