Situation(s) [48°47’34’’ N / 2°23’14’’ E]

I N D E P E N D E N C E of H-2k and H-2d a N T I G E N I C

Our concept of the fine structure of the complex I-I-2 region of linkage group IX in the mouse has continued to evolve almost constantly since the initial discovery by Gofer of serologically detectable alloantigens associated with a gene responsible for graft rejection (1). I t became apparent by the 1950's that this gene, H-2, far from being a single gene, was subdivisible into antigen-determi...

E N G I N E E R I N G & S C I E N C E N O . 2

Our brains have to make hypotheses about what we think is out there in the real world. We hope that these hypotheses are right, because a mistake could be fatal.

d e v e l o p i n g a n i n v e n t o r y m o d e l u n d e r a v e n d o r-m a n a g e d i n v e n t o r y (v m i) p o l i c y w i t h d e f e c t i v e i t e m s a n d p r i c e-d e p e n d e n t d e m a n d

o r g a n i z a t i o n s i n a s u p p l y c h a i n a r e i n d e p e n d e n t e n t i t i e s. a l t h o u g h a c o m p l e t e l y i n t e g r a t e d s o l u t i o n m a y r e s u l t i n o p t i m a l s y s t e m p e r f o r m a n c e, s u p p l y c h a i n m e m b e r s a r e i n t e r e s t e d i n o p t i m i z i n g t h e i r o w n o b j e c t i v e r a t h e r t h a n t h a t o f t...

(E,E)-N,N′-Bis­(4-methoxy­benzyl­idene)cyclo­hexane-1,2-diamine

In the title compound, C(22)H(26)N(2)O(2), the meth-oxy and the benzyl-idene groups are essentially coplanar, and the cyclo-hexane ring has a chair conformation. The two halves of the mol-ecule are related by a twofold rotation. The crystal structure is stabilized only by van der Waals inter-actions.

C E M E N T