A n s w e r s to m a n y b a s i c p r o b l e m s of b i o l o g y — n a t u r e o f g r o w t h , m e c h a n i s m of d u p l i c a t i o n o f v iruses a n d g e n e s , a c t i o n o f e n z y m e s , m e c h a n i s m , of p h y s i o l o g i c a l ac t iv i ty of drugs , h o r m o n e s , a n d v i t a ­ m i n s , s t r u c t u r e a n d a c t i o n o f nerve a n d braini t i s s u e — m...

A l t h o u g h m e t h a n o l i s t h o u g h t t o b e a n e x c e l l e n t a u t o m o t i v e f u e l , i t h a s a smaller v o l u m e t r i c f u e l v a l u e t h a n g a s o l i n e . T h e c a t a l y t i c d e c o m p o s i t i o n o f m e t h a n o l i n t o s y n g a s , p r i o r t o i t s c o m b u s t i o n i n t h e e n g i n e , i m p r o v e s i t s f u e l v a l u e by a p ...

F u n d a m e n t a l p r o b l e m s of g r o w t h a n d t h e sc reen ing of c h e m o t h e r a p e u t i c a g e n t s b e c o m e m o r e n e a r l y de f inab le in precise c h e m i c a l t e r m s w h e n q u a n t i t a t i v e p rocedu re s (5, 9) for e s t i m a t ing p ro l i f e r a t i on are used in t h e p resence of a c h e m i c a l l y def ined b a c k g r o u n d m e d i u ...

the aim of this study was to investigate the barrier properties of cellulose nanocrystals-pvananocomposites. nanocomposite films with different filler loading levels (3, 6, 9 and 12% by wt) weredeveloped by solvent casting method. the effect of cellulose nanocrystals on the barrier properties ofthe nanocomposites was studied. to this end, moisture absorption, water vapor permeability (wvp),oxyg...

T h e c r y s t a l s t r u c t u r e s o f t h e c o m p o u n d s [ R 3 C P ( X ) N R ] 2 ( R = C H 3 ; X = S , T e f o r eis i s o m e r s a n d X = l o n e p a i r , S , T e f o r trans i s o m e r s ) ( 2 6 ) w e r e d e t e r m i n e d f r o m s i n g l e c r y s t a l X r a y d a t a . T h e f o u r m e m b e r e d P N r i n g s i n t h e eis i s o m e r s 2 a n d 3 s h o w s i g n i f i...

A ske t ch of a programme f o r man-machine communica t i o n as be ing p repared by Prague l i n g u i s t s is p r e s e n t e d , w i t h a c h a r a c t e r i z a t i o n o f the scope o f nega t i on and of the n a t u r e of focus two problems t h a t appeared c r u c i a l w i t h r e s p e c t t o the f o l l o w i n g i saues i ( i ) g rammat ica l a n a l y s i s o f i n p u t t e x t...

I n t r o d u c t i o n . D u r i n g t h e l a s t d e c a d e , p r e c i s i o n s t a n d a r d s o f f r e ' quency , a n d t h e c l o c k s b a s e d u p o n t h e m , h a v e p l a y e d i n c r e a s i n g l y i m p o r t a n t r o l e s i n t h e t r a n s m i s s i o n o f r a d i o s i g n a l s f o r a v a r i e t y o f a p p l i c a t i o n s . I n t h i s p a p e r , we d i s c u...

C t v i o u s l y , d e m o n s t r a t i n g t h a t ADAPT s t u d e n t s h a v e c h a n g e d o n t h e a h c v e d i m e n s i o n s is n o t s u f f i c i e n t . C e r t a i n l y o n e would e x p e c t some g r o w t h a n d c h a n g e t o o c c u r d u r i n g a c o l l e g e s t u d e n t ' s f r e s h m a n y e a r , A m o r e c o m p e l l i n g d o c u m e n t a t i o n of c h a ...

the effect of arbuscular mycorrhizal fungi and plant growth promoting rhizobacteria, with the ability to produce acc deaminase enzyme, on water relationships and agronomic indices of sunflower (helianthus annuus l.) cultivars was investigated. the soil used was of an ec equal to 7.6 ds m-1. a greenhouse factorial experiment on the basis of a completely randomized block design with three levels ...

T h i s s h o r t pape r o u t l i n e s a me thodo logy f o r g e n e r a t i n g r e a s o n a b l e d e s c r i p t i o n s , i n r e a l t i m e , o f s i m p l e v i s u a l s i t u a t i o n s i n v o l v i n g one o r two mov ing o b j e c t s (Hogg 1 9 7 7 ) . An i m p l e m e n t a t i o n , based upon t h i s m e t h o d o l o g y , was c o n s t r u c t e d by the a u t h o r a t t h...