منابع مشابه
Cilia drop anchor
Cilia hoist dust out of the lungs, propel sperm toward the egg, and enable us to catch the scent of fresh coffee. The structures also help some cells attach to their surroundings, Schouteden et al. reveal (1). A cilium is built around the axoneme, an internal shaft of microtubules that sprouts from a structure known as the basal body. Between the axoneme and the basal body lies the transition z...
متن کاملLeukocytes drop anchor
B urkart et al. describe how a secreted protease helps egg cells avoid being fertilized by more than one sperm. Because polyspermy disrupts em-bryonic development, oocytes take several steps to ensure they only fuse with a single sperm. One key step is to prevent additional sperm from binding to the surface of an already-fertilized egg, a blockade that involves the release of secretory granules...
متن کاملOP - ED P . 3 Dont bum the Qur * an , either
T h e m e m b e r s of t h e S t u d e n t Ass o c i a t i o n , d e c k e d out in "BRO-wear," g a t h e r e d in t h e Farnsworth Pav i l ion Sept . 6 for s m o o t h i e s , b a c k s l a p s a n d s o m e t h i n g m o r e ser ious : d i s c u s s i o n of t h e S t u d e n t A d m i n i s t r a t i o n Relat i o n s R e s o l u t i o n . This r e s o l u t i o n w a s i n t r o d u c e d a...
متن کاملDont Breathe and Drive? Pollutants Lurk inside Vehicles
The ability of human immunodeficiency virus type 1 (HIV-1) to develop high levels of genetic diversity, and thereby acquire mutations to escape immune pressures, contributes to the difficulties in producing a vaccine. Possibly no single HIV-1 sequence can induce sufficiently broad immunity to protect against a wide variety of infectious strains, or block mutational escape pathways available to ...
متن کاملSome Have a Talent for Bargaining and Some Dont
In Bargaining Theory players di¤er from one another in either their valuation for the negotiated object and/or their time preferences. We suggest a model that incorporates "bargaining ability" as another source for heterogeneity across players. This bargaining ability for the buyer determines how many o¤ers he will be able to turn down before he walks away. For the seller this ability determine...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of General Internal Medicine
سال: 2014
ISSN: 0884-8734,1525-1497
DOI: 10.1007/s11606-014-2995-6