منابع مشابه
Life from an RNA World
platelet serotonin levels. Curiously, both groups of rats differ noticeably from their wild-type counterparts only when confronted with an environmental or pharmacological challenge. The book then goes on to describe the interaction between the serotonin system and other neurotransmitters, particularly dopamine, in models of drug reward. Primates, like humans, have complex social lives yet can ...
متن کاملThe Origin and Early Evolution of Life: Prebiotic Chemistry, the Pre-RNA World, and Time
Antonio Lazcano* and Stanley L. Miller† models incorporate high partial pressures of CO2 to raise the temperature of the Earth by a greenhouse effect *Departamento de Biologı́a Facultad de Ciencias and thus prevent the complete freezing of the oceans (Kasting, 1993). However, a frozen Earth has some adUniversidad Nacional Autónoma de Mexico Apartado Postal 70-407 vantages for prebiotic chemistry...
متن کاملTom Cech: New life beyond the RNA World
To hear Tom Cech tell it, he came by his prodigious success — Nobel Prize at 41, presidency of the Howard Hughes Medical Institute (HHMI) this year at 52 — thanks to lots of help from his friends. His 1982 discovery that RNA could behave like an enzyme and splice itself led to the 1989 Nobel in chemistry, which he shared with Sidney Altman. But he says he stumbled into the RNA World — then a sm...
متن کاملA new scenario for the early RNA world
Mini-ribozymes and freezing environment: a new scenario for the early RNA world A. V. Vlassov Somagenics, Inc., 2161 Delaware ave., Santa Cruz, California 95060, USA Institute of Chemical Biology and Fundamental Medicine, 8, Lavrentiev ave., Novosibirsk 630090, Russia Received: 4 October 2005 – Accepted: 8 November 2005 – Published: 16 November 2005 Correspondence to: A. V. Vlassov (avlassov@so...
متن کامل“the effect of risk aversion on the demand for life insurance: the case of iranian life insurance market”
abstract: about 60% of total premium of insurance industry is pertained?to life policies in the world; while the life insurance total premium in iran is less than 6% of total premium in insurance industry in 2008 (sigma, no 3/2009). among the reasons that discourage the life insurance industry is the problem of adverse selection. adverse selection theory describes a situation where the inf...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2018
ISSN: 0960-9822
DOI: 10.1016/j.cub.2018.03.017