منابع مشابه
Metal speciation and microbial growth - the hard ( and soft ) facts
Micro-organisms require certain metallic elements for growth and function (Hughes & Poole, 1989). These include, for example, the bulk elements potassium and magnesium, and trace elements such as manganese, iron, copper, zinc and molybdenum. Essential metals are shown in Fig. 1, the Periodic Table. The need for these essential metals is, or should be, acknowledged in the composition of growth m...
متن کاملChiral Symmetry in Nuclei Theoretical Expectations and Hard Facts
It is widely believed that chiral symmetry is restored not only at high temperatures, but also at high nuclear densities. The drop of the order parameter of the chiral phase transition, the chiral condensate, with density has indeed been calculated in various models and is as such a rather robust result. In this talk I point out that the connection of this property with actual observables is fa...
متن کاملUseful characters in gastropod phylogeny: soft information or hard facts?
SMITH, A. B. 1994. Rooting molecular trees: Problems and strategies. Biol. J. Linn. Soc. 51:279–292. SOLTIS , D. E., AND 15 OTHER AUTHORS. 1997. Angiosperm phylogeny inferred from 18S ribosomal DNA sequences. Ann. Mo. Bot. Gard. 84:1– 49. SWOFFORD, D. L. 1999. PAUP¤ : Phylogenetic analysis using parsimony, version 4.0. Sinauer Associates, Sunderland, Massachusetts. TEMPLETON, A. R. 1983. Phylog...
متن کاملHard Facts about Stones: Pulpal Calcifications: A Review
Pulp calcifications stones are discrete calcifications within the pulps of teeth. They are a frequent finding on bitewing and periapical radiographs. Johnson and Bevelander stated that a single tooth may have stones ranging from 1 to 12 or even more, with sizes varying from minute particle to large masses that occlude the pulp space. They often develop in teeth that appear quite normal in other...
متن کاملAngiomyoma of the Hard Palate
Leiomyoma is a rare benign neoplasm deriving from smooth muscle. Vascular leiomyoma is its most common subtype in the oral cavity. It may appear at any age with the greatest incidence in the 4th and 5th decade of life. The common manifestation is a slow-growing, asymptomatic, submucousal mass. The diagnosis is only through microscopic examination requiring special staining...
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: 2012
ISSN: 0028-0836,1476-4687
DOI: 10.1038/485s50a