By Roger Tory Peterson; Margaret McKenny
This ebook is a advisor to the wildflowers within the Northcentral and jap areas of the U.S.. Map of zone lined by way of this publication -- creation -- thesaurus -- The households of plants -- White or whitish plant life -- Yellow plants -- Orange flora -- crimson to purple vegetation -- Violet to blue vegetation -- eco-friendly and brown vegetation -- eco-friendly flora -- Brown plants -- Index
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Extra resources for A field guide to wildflowers : Northeastern and North-central North America
T h e production of s o m e bacterial toxins h a s been studied in still c u l t u r e s , for e x a m p l e the g l y c o p e p t i d e s p r o d u c e d by Corynebacterium s p p . (Rai and Strobel, 1969a; Strobel, 1970; Ries and Strobel, 1972a) and s y r i n g o m y c i n (Gross and D e V a y , 1977a). T h e p r o d u c t i o n of Phytotoxins by fungi has been studied m o r e c o m m o n l y in still cultures b e c a u s e such c o n d i t i o n s usually allow m a x i m u m a c c u m u l a t i o n of the p r o d u c t .
O n e w a y i o n - e x c h a n g e resins h a v e been used in toxin isolation is simply as a m e t h o d to r e m o v e ions from u n c h a r g e d toxins or toxins that at appropriate p H values are only w e a k l y ionized ( e . g . , 1974; Corynebacterium g l y c o p e p t i d e s Ries and Strobel, 1972b, Rai and Strobel, 1969a, Strobel, 1967; p h a s e o l o t o x i n Hoitink and S i n d e n , 1970; and Pyrenophora teres toxin, S m e d e g â r d - P e t e r s o n , 1977). , 1979), Pyrenophora teres toxin ( S m e d e g â r d - P e t e r s o n , 1977), and p h a s e o l o t o x i n (Mitchell, 1 9 7 6 a , b ) .
For e x a m p l e , the original p e n i c i l l i n - p r o d u c i n g Pénicillium s p p . w e r e able to p r o d u c e the antibiotic only in still c u l t u r e . A major b r e a k t h r o u g h o c c u r e d w h e n strains w e r e found that could p r o d u c e the antibiotic in shaken flasks and fermenters ( B a c k u s and Stauffer, 1955). T o x i n s p r o d u c e d by bacteria are for the most part p r o d u c e d in cultures s u b j e c t e d to either rotary or reciprocal s h a k i n g .