منابع مشابه
A Close Look at Proteins
Proteins, macromolecules of almost unmatched complexity, display highly specific functionalities only when folded into a distinct three-dimensional (3d) configuration. Protein folding, a complex self-assembly process, thus links the protein’s functionality to the atomic arrangement of the peptide chain. Consequently the protein’s three-dimensional shape as well as its peptide sequence are of pi...
متن کاملTaking a close look at electrosensing
The brain of the brown ghost knifefish, which uses electric fields to "see", processes electrical signals in a way that is similar to how our brains interpret visual and auditory signals.
متن کاملA close look at therapeutic touch.
CONTEXT Therapeutic Touch (TT) is a widely used nursing practice rooted in mysticism but alleged to have a scientific basis. Practitioners of TT claim to treat many medical conditions by using their hands to manipulate a "human energy field" perceptible above the patient's skin. OBJECTIVE To investigate whether TT practitioners can actually perceive a "human energy field." DESIGN Twenty-one...
متن کاملA close look at wiggly chromosomes.
In a recent issue of Cell, Fisher et al. (2013) use high-resolution time-lapse imaging to peer into bacterial genome (nucleoid) structure. The nucleoid, an elastic filament confined via an internal network, undergoes periodic fluctuations critical in relieving tension. Programmed tethers and their release highlight a primordial mechanical cycle for chromosome segregation.
متن کاملA Close Look at Composition Languages
A large number of different composition systems and techniques have been developed over the last years. To compare their relative benefits and drawbacks, we need a common vocabulary for describing elements of composition systems. This paper contributes to the search for such a vocabulary by taking a closer look at the structure of composition languages—that is, languages used for describing com...
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: Nature
سال: 1980
ISSN: 0028-0836,1476-4687
DOI: 10.1038/288009a0