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Storage Drying of Beans : II. Moisture Content Measurement for Beans

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Storage Drying of Beans : II. Moisture Content Measurement for Beans

その他(別言語等)

のタイトル

豆類の貯蔵乾燥 : II. 豆類の含水率測定法につい て

著者(英) Ishibashi Ken'ichi journal or

publication title

Research bulletin of Obihiro Zootechnical University. Series I

volume 11

number 2

page range 311‑322

year 1979‑05‑18

URL http://id.nii.ac.jp/1588/00002250/

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' 同

R e s .  B u l l .  O h i h i r o  U n i v . ,  11 ( 1 9 7 9 ) :  311‑‑322 

Storage Drying of Beans 

I I .   Moisture Content Measurement f o r  Beans 

K e n ' i c h i  I S H I B A S H I  

( D e T a r t m e n t  0 1  A g r i c u l t u r a l  C h e m i s t r y ,  O b i h i r o  U n i v e r s i t y  01 A g r i c u l t u r e   and V e t e r i n a r y  M e d i c i n e ,  O b i h i r o ,  H o k k a i d o ,  Ja ρ a n )  

R e c e i v e d  Nove

b e r3 0 ,  1 9 7 8  

豆 類 の 貯 蔵 乾 燥

I I .   豆類の合水率測定法について 石 橋 憲 一 *

Introduction 

3 1 1  

B a s i c  methods o f  measuring t h e  m o i s t u r e  c o n t e n t  o f  p r o d u c t s  g e n e r a l l y  i n v o l v e  e i t h e r   t h e  measurement o f  l o s s   o f  w e i g h t  upon h e a t i n g  t h e  p r c d u c t  f o r  l o n g  p e r i o d s  and p r e f e r a b l y   i n   vacuum ,  o r  a  c h e m i c a l  e s t i m a t i o n  o f  e x t r a c t e d  w a t e r  

Oven d r y i n g  methods u s i n g  b o t h  whole g r a i n  and m i l l e d  g r a i n  have been d e v e l o p e d .   M i l l i n g  t h e  g r a i n  r e d u c e s  d r y i n g  t i m e  c o n s i d e r a b l y .   But d u r i n g  t h e  m i l l i n g  p r o c e s s ,  t h e   g r a i n  c a n  r a p i d l y  exchange m o i s t u r e  with t h e  s u r r o u n d i n g  a i r  e s p e c i a l 1 y  i f   t h e   m i l l   h e a t s   t h e  g r a i n .   M i 1 1 i n g  i n c r e a s e s  c h e m i c a l  d e c o m p o s i t i o n  o f   t h e   g r a i n   i n   t h e   o v e n .   Oven  d r y i n g  methods u s i n g  whole g r a i n , 出 e r e f o r e , have been recommended.  W  ARNER e t   a l .   ( 1 9 6 3 )   s u g g e s t e d  t h a t  t h e  sample w

g h ts h o u l d  be a t   l e a s t  1 0   g  f o r  t h e  p u r p o s e  o f  r e d u c i n g   e r r o r s  i n  w e i g h i n g  

For b e a n s  and c o r n ,  t h e  s t a n d a r d  e s t a b l i s h e d  by t h e   A m e r i c a n  S o c i e t y  o f  A g r i c u l t u r a l   Enginee

ng(ASAE ,  1 9 7 3 )   recommended oven d r y i n g  o f  whole  k e r n e l s   a t   103 土 l

O

C f o r   7 2 h r .  

The p r o d u c t s  which c o n t a i n  v o l a t i l e   compounds o t h e r  t h a n  w a t e r  must be t r e a t e d   by  a n o t h e r  m e t h o d .   None o f  t h e  w e i g h t ‑ l o s s  methods a r e   adeQua 怯 t o d 征 e r e n t i a t e l o s s   o f   w a t e r  from l o s s   o f  o t h e r  v o l a t i l e  s u b s t a n c e .   The i m m i s c i b l e   s o l v e n t   d i s t i l l a t i o n   method  c a n  be used f o r  t h i s   p u r p o s e  

B e s i d e s  t h e  above methods ,  SCHWE

Ee t   a l .   ( 1 9 6 4 )  found t h a t  t h e   t e c h n i q u e   o f   g a s   l i q u i d  c h r o m a t o g r a p h y  (GL C )  i s   w e l l  s u i t e d

t h ed e t e r m i n a t i o n  o f  water i n   a v a r i e t y   o f   f o o d  p r 仙 c t s . SHAW e t  a l .   ( 1 9 5 , め CONWAY e t  a l   仏 9 5 7 )and RUBIN ( 1 9 5 8 )   h a v e

p o r t e d 養帯広畜産大学農産化学科製造燐械学議室

‑79 ー

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