منابع مشابه
Vertex-Disjoint Copies of K1 + (K1 ∪K2) in Graphs
Let S denote the graph obtained from K4 by removing two edges which have an endvertex in common. Let k be an integer with k ≥ 2. Let G be a graph with |V (G)| ≥ 4k and σ2(G) ≥ |V (G)|/2 + 2k− 1, and suppose that G contains k vertex-disjoint triangles. In the case where |V (G)| = 4k+2, suppose further that G K4t+3 ∪ K4k−4t−1 for any t with 0 ≤ t ≤ k − 1. Under these assumptions, we show that G c...
متن کاملA remark on the positivity of K2
For a number field F , it is proved that the K2-semigroup K2(F,F++) defined in [R.V. Moody, J. Morita, J. Algebra 229 (2000) 1] has similar properties to the positive K2 group K + 2 (F) introduced by Gras in [J. Number Theory 23 (1986) 322]. 2003 Elsevier Inc. All rights reserved.
متن کاملVitamins K1 and K2: The Emerging Group of Vitamins Required for Human Health
OBJECTIVE To review the evidence for the use of vitamin K supplementation in clinical conditions such as osteoporosis, vascular calcification, arthritis, cancer, renal calculi, diabetes, and warfarin therapy. QUALITY OF EVIDENCE PubMed was searched for articles on vitamin K (K1 and K2) along with books and conference proceedings and health conditions listed above. Level I and II evidence supp...
متن کاملidentification of klebsiella pneumoniae k1 and k2 capsular types by pcr and quellung test
background: klebseilla pneumoniae causes urinary tract infections, nosocomial pneumonia and intra-abdominal infections. capsular antigens are considered to be the ultimate virulence determinants. among 77 capsular serotypes of k. pneumoniae, serotypes k1 and k2 are the most virulent ones in humans. objectives: we designed a pcr method for detection of capsular serotypes k1 and k2 of k. pneumoni...
متن کاملNew inhibitors of melanogenesis, OH-3984 K1 and K2. II. Physico-chemical properties and structural elucidation.
New melanin synthesis inhibitors, OH-3984 K1 and K2, were isolated from the fermentation broth of Streptomyces sp. OH-3984, and their structures were elucidated by spectroscopic methods and by chemical transformations. OH-3984 K1 (M.W.: 306; C18H26O4) and K2 (M.W.: 308; C18H28O4) have unique gamma-lactone rings, both of which correspond to oxidative products derived from C1-O14 cleavage of the ...
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ژورنال
عنوان ژورنال: Journal of Algebra
سال: 2000
ISSN: 0021-8693
DOI: 10.1006/jabr.1999.8172