PAGE I . I n t r o d u c t i o n 3 2 8 I I . D e s c r i p t i o n o f t h e w e i g h t r h y t h m . . . . . . 3 2 9 I I I . R e l a t i o n t o a c t i v i t y . . . . . . . 3 3 1 I V . R e l a t i o n t o e n v i r o n m e n t a l v a r i a t i o n s 3 3 2 V . R e l a t i o n t o u p t a k e o f f o o d a n d w a t e r . . . . . 3 3 4 V I . B e h a v i o u r o f s n a i l s i n h u m i d a ...

Metalloporphyrins are ubiquitous in nature, particularly iron porphyrins (hemes) and magnesium dihydroporphyrins or chlorophylls. Oxovanadium (IV) complexes of alkyl porphyrins are widely distributed in petroleum, oil shales and maturing sedimentary bitumen. Here we identify new vanadium compounds in Venezuela Orinoco heavy crude oil detected by Fourier transform-ion cyclotron resonance mass sp...

Herein, graphene oxide is produced by electrochemical oxidation method from graphite rod to examine its hydrogen peroxide sensing ability. The electrochemically produced graphene oxide is characterized by SEM and XRD. A few layers of Graphene Oxide(GO) sheets and corrugations in graphene sheets appeared intensely crumpled and folded into a typical wrinkled structure after electrochemical oxidat...

C O N J U G A T I O N . . . . . . . . . . . . 3 8 9 F o r m a t i o n a n d d i v i s i o n o f t h e p r o t o c o n j u g a n t . . . . . . . 3 8 9 B e h a v i o u r o f t h e m i c r o c o n j u g a n t . . . . . . . . . 3 9 1 N u c l e a r p h e n o m e n a i n t h e m i c r o a n d m a c r o c o n j u g a n t s . . . . . 3 9 2 T h e m a t u r a t i o n a n d t h e first d i s t r i b u t i...

G a u g e i n v a r i a n c e i s t h e b a s i s o f t h e m o d e r n t h e o r y o f e l e c t r o w e a k a n d s t r o n g i n t e r a c t i o n s ( t h e s o c a l l e d S t a n d a r d M o d e l ) . T h e r o o t s o f g a u g e i n v a r i a n c e g o b a c k t o t h e y e a r 1 8 2 0 w h e n e l e c t r o m a g n e t i s m w a s d i s c o v e r e d a n d t h e f i r s t e l e c t r o d...

A mode l based compute r v i s i o n sys tem has been d e v e l o p e d w h i c h can d e t e r m i n e t h e p o s i t i o n and o r i e n t a t i o n o f s e v e r a l p a r t s i n t h e same s c e n e . The p a r t s can b e o f t h e same t y p e o r o f d i f f e r e n t t y p e s . F u r t h e r m o r e , t h e sys tem can work w i t h v i s u a l l y n o i s y scenes and some o c c l u ...

The reactions of neutral vanadium oxide clusters with alkenes (ethylene, propylene, 1-butene, and 1,3-butadiene) are investigated by experiments and density function theory (DFT) calculations. Single photon ionization through extreme ultraviolet radiation (EUV, 46.9 nm, 26.5 eV) is used to detect neutral cluster distributions and reaction products. In the experiments, we observe products (V(2)O...

BACKGROUND Elevated dead space fraction (the ratio of dead space to tidal volume [V(D)/V(T)]) is a feature of ARDS. PEEP can partially reverse atelectasis, prevent alveoli recollapse, and improve lung compliance and gas exchange in patients with ARDS. However, whether V(D)/V(T) variables have a close relationship with PEEP and collapse alveolar recruitment remains under recognized. Meanwhile, f...