1160
INDUSTRIAL AND ENGINEERING CHEMISTRY
Vol. 39, No. 9
Storage of Commercial
Dehydrated Alfalfa Meal T
111s storagc study was und kcii i n thtt h ( ~ p of ~ *finding n possible postwar means of utilizing thr. natural cooler htoragt, which was developed as a wartime expedient. The effect of different types of hags for storage of tlchytlrated alfalfa n i c d was also a consideration. The dehydrated alfalfa nieal used in this study 1va5 place tilerider and xiiised tlioroughly. The mesal used in the first was of relatively high carotene content aiid \vas placed in regular size plait1 . burlap hags, small plain burlap hags, sinal1 \vale?1
P r c w i r adrIrP.i,
"tip
R'. .I. Piiinll Conipaiiy-. I n c , l i a l 1 w > r i t y , 310,
.
INDUSTRIAL AND ENGINEERING CHEMISTRY
1162
Plain burlap. 100 Plain b u r l a p , 25 Waterproofed burial,. 2 5 Paper, plairi, 2 5 P a p e r with 1 a s p l i a l t - l a ~ i ~ i ~ i a t e d ~ I 2i e5 e t , P a p e r with 2 a r p I i a l t - l n i i ~ i n u t e d - I ~ e ~25 t-.
:308 HO:i 3 CJ :3 3U:i 30 3
-
IF1 !I 15 3 181 15 4 14 6
Plain burlap, 100 Plain burlap, 2 5 Katerprooied burlap, 1'5 P a p e r , plain, 2 5 Paper nitli 1 a5phalt lar11inatedstieri,'5 Paper w i t h 2 epphalt Ianiinated?heets. 2 5
:30:3
2 h ; 2h!l 2911
24 ii 26 11 251
:i(I:j
:303 :i(l,'i
:3fl,3 8 0 :I 30 R
15 5
2 1 j 226 L' 1 L'On
2b6 1'9 2
Plain burlap, 100 Plain burlap, 2 5 Waterproofed burlap, 2 5
21,2 21.2 21.2
16.2 16.8 16.0
Plain burlap, 1 0 0 Plain burlap, 2 5 Katerproofed burlap, 2 5
21.2 21.2 21.2
'0 1
19.2 19.5
1 4 , .i
1s 9 20.4
15 5
11 7
16 1
12 !i !i :i
13 :3
18 5
211.1 17.0
M , Y 5 7 i 5
.i3 5 8 5 3
5.8
5.3
18.:3
203
18.2 18 3
11 1 1% 2
$
.i :3 6 8
13 5 8 8 12 9 8 6 9 .0
%5.8
5 3
i 4
5.3 5 8 5 :3 5 3 0 3
8 5 5.3
,
8
5 2 5.5
7 i3 8 3
i ?
5 3
6 0
5 9
16 1 17 8
15 3 16 9
5 3
146
134
7 1 8 8 5 3
7 4 9: 5.,
5 3 5 3
6 8
8.1
7.9
5 8
5.7
8.0 5 9 6.0
8.1 5.5 5.3
7.5 9.1 5.6 9.8
8.5 10.0 5.6 10 2 5 8 5.8
5.4
5 3 5 3
7 6
6.6
5.5
8.3
beaker, it \vas coiicciitratetl t o it volume of 30-10 1111. on :I >iriiiit bath and then poured onto a column for separation of tlic CRI'Ot e w s from the other pigments. -1layer of anhydrous sodiritii sulfate \vas placed on top of the column, which coii+tid of I V ~ J parts of Hyfio Super-Cel and 1 part of magnesia (IIicroii SI,. 2641 ). The chromatogram n-as dewloped, and the caroiciic~, eluted ~ ~ i ta lni approsimately- 5"; solution 01 acetone in Slatllysolve B. T h e eluate vias made up to a volume of 250 nil., aiid the optical density read on a Becknian ( 1 ) quartz sp(~ctrophotcin~rtcr. at -136 mp. RESULTS
11 2
22.5 195 21: 19 I lQ.6
231 26 2 25 6
2Sl.2
I:! il 18 0 9 6 11' 8 10 6 10 0
Vol. 39, No. 9
7 8 8 5
6.0 9 1 9.4 6.1
7.6 8.7
5.8 9.0 6.0 6.2 8 0
10.3 5.9
p
1; 6 2
7 8 9 0 A 2
8 i 10 2 6.0
G(~iici~al!y, the, amount of carotene present in the meals n1iic.h t h e higher nioi.t,ure content was greater than in those n h i c ~ l * Iiad a Ion-er percentage of moisture. The data in Tablr 111 n-ere obtained on determination of t t w ~ w i > t ~ill n ethe meal of the eeroiid series. Table 111also containc thi. d a t a resulting from moisture determinations of the sanic nical. ('onip:irisori of values in these tables will shon. t h a t the rerult\ v ( ~ r ciin:ilrjpous ~ i n those found for the first series. T h difference in the carotene content of the alfalfa nii~:il r t c i i , ~ din particular typrs of bags in both the warehouse and tlic. iiatiir:iI conlrr is represented graphically in Figure 1 for the iiir>:iI of scxricss 1 :tnd Figure 2 for the meal of series 2. The n.idi:st rlift'i~rc~ncc~n due t o the diffewnt typc of bags used in this study art' :i1ric;. The first half of the table represciits t h r values oLt:iinc~tli'oi, thts mcals n-hich wrre stored in the warehou.sc, mil tli rccoids the values for tlie meals stored in the natur Table I1 slio\vs that considerably lvss carotc.no vas 1o.i 1 ' i n l i i i the meal which n-as stored in tlic natural cooler t l m i irorii tlic mval stored in corrcsponding bags i n ihe nwrhoii>(,. .i i i i i i n l x , i , of worlwi~s(,?, j , .5) have shoivn that the stability i j l c : i r o t i ~ i ~ivi i 3 s the storage teniperaturc i- i i i v i , i lcwt 1(13< of c:ii~ritc~iii~ vi^ fount1 in thc n i i ~ i l01' (.:i(,li ycti,il.,- t t i : i l vias sioi,cd i n t h ( 3 ,.m:tll 11l:iiii l)urlni) I x i p in ( ~ i d-trir:igc> i liii,xtiiiti, Generally, iiicrt*awd Itra-: o!' cariitc>iica \v:i> not ~ ~ t'i,iiiii 1 1 thi. V : L I ~ U W typrs of \jags in t1iv roll(i\\-irigOId y r , iiw-lir>ctivi, (~j.~ t i ~ r i i gl to, i ~ t tion: p1:iin p:iiivi' I);ipi. l:iqy 1jl:iiii l ~ ~ l : Ixtgs, i p p:i1wr 1 j : i p Ivit l i 1iiniiii:ited ~ l i c ~ c piLpi1r t, I ) a p v i t h t\ro x ~ p l i : ~ l ~ , ', 31111, fin:i11>-, the n.:4tcrproof(d l>uf~l:lpl1:1g., il oii a tlrv \vt>iglii I l : i 4 - . 11; ~:inipli- (11' n i w l i i i C'orisii1criil)ly m o i i ~niiiiiture n-as taken up by tlie bags c~i'nicd 1v1iic.h IV( natiiral cooler, since a high relati\-(' huniitlir y c\;i,>tid ~ l i r o i ~ g h i ~ ~ i t the storage period. 11 pecrire of' thc storage location. ho\\ ever, the absorption as greatest in tlic: p1:iin p:tper tinp. IIIII 1101 much differrnt from that noted for the small plain Iiui,l:ip 1 ) : i p . Somewhat less moisture v-as absorbed by the nic'nl in tliv Iargi: plain burlap bags, as the exposed area \vas relatively I t ~ n . Rchtively little moisture was absorbed by the meal btored in the waterproofed burlap bags or the two types of paper bags \vhic*h contained the sprcial asphalt-laminatrd sheets.
