منابع مشابه
Metamorphosis starts with Met.
J uvenile hormone (JH) has long been known to be a potent regulator of metamorphosis in most insects, but learning how it acts has been hindered until now by failure to find an entry point for its mechanism of action. Using the beetle Tribolium castaneum, Konopova and Jindra (1) have achieved a result long and fruitlessly sought in Drosophila, which is reported in this issue of PNAS. They have ...
متن کاملLiving with elder wisdom.
This study is based on interview research with over a hundred creative elders. Their spirituality is explored through their life experiences as re-interpreted in later years. Spirituality is often expressed in non-religious language. They speak of inner empowerments: cultivating self-esteem, harvesting memories, transformative turning points, life-long learning, themes of humor and gratitude, a...
متن کاملSleep starts
By Ramadevi Gourineni MD (Dr. Gourineni of Northwestern Feinberg School of Medicine in Chicago, Illinois has no relevant financial relationships to disclose; Dr. Gourineni's spouse is founder and CEO of G2 Health Care.) Pasquale Montagna MD (deceased) (Dr. Montagna of the University of Bologna in Bologna, Italy, received honorariums from Boehringer Ingelheim and GlaxoSmithKline for consulting.)...
متن کاملNuclear envelope starts with a clean sheet
A t the start of mitosis, the nuclear envelope breaks down and merges with the endoplasmic reticulum (ER). At the same time, the nuclear pore complexes that mediate transport across the inner and outer membranes of the envelope also disassemble. Transmembrane pore proteins move into the ER, while soluble components disperse into the cyto-plasm. Lu et al. use rapid, live-cell 3D imaging to estab...
متن کاملSequential all-pay auctions with head starts
We study a sequential all-pay auction where heterogeneous contestants are privately informed about a parameter (ability) that a¤ects their cost of e¤ort. In the case of two contestants, contestant 1 (the rst mover) makes an e¤ort in the rst period, while contestant 2 (the second mover) observes the e¤ort of contestant 1 and then makes an e¤ort in the second period. Contestant 2 wins the conte...
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ژورنال
عنوان ژورنال: Journal of Chemical Education
سال: 1968
ISSN: 0021-9584,1938-1328
DOI: 10.1021/ed045p549