vitamin k is required for the hepatic production of blood coagulation factors ii, vii, ix and x. the term vitamin k refers to a variety of fat-soluble 2-methyl-1, 4-naphthoquinone derivatives. vitamin k1 (phylloquinone) occurs in green plants, while vitamin k2 (menaquinone) is synthesized by microbial in the gut. the recommended dose of vitamin k in neonates is 1 mg intramuscularly. for infants...

One of the most basic questions in knot theory remains unresolved: is crossing number additive under connected sum? In other words, does the equality c(K1♯K2) = c(K1) + c(K2) always hold, where c(K) denotes the crossing number of a knot K and K1♯K2 is the connected sum of two (oriented) knots K1 and K2? The inequality c(K1♯K2) ≤ c(K1) + c(K2) is trivial, but very little more is known in general...

in this study, absorption of high frequency radio waves in the ionospheric plasma have beeninvestigated. the wave equation was obtained in terms of ionospheric parameters. the numerical values ofthe absorption have been calculated for 4 mhz, 4.5 mhz and 5 mhz waves. the necessary parameters forcalculation have been obtained using an international reference ionosphere (iri) model. the altitudina...

Kaposi's sarcoma herpesvirus (KSHV) is the etiologic agent of Kaposi's sarcoma (KS) as well as two lymphoproliferative diseases, primary effusion lymphoma and multicentric Castleman's disease. KSHV encodes viral proteins, such as K1, that alter signaling pathways involved in cell survival. Expression of K1 has been reported to transform rodent fibroblasts, and K1 transgenic mice develop multipl...

The vast majority of cases of gram-negative meningitis in neonates are caused by K1-encapsulated Escherichia coli. The role of the K1 capsule in the pathogenesis of E. coli meningitis was examined with an in vivo model of experimental hematogenous E. coli K1 meningitis and an in vitro model of the blood-brain barrier. Bacteremia was induced in neonatal rats with the E. coli K1 strain C5 (O18:K1...

The Alexandrov–Fenchel inequality bounds from below the square of mixed volume V(K1,K2,K3,…,Kn) convex bodies K1,…,Kn in ℝn by product volumes V(K1,K1,K3,…,Kn) and V(K2,K2,K3,…,Kn). As a consequence, for integers α1,…,αm∈ℕ with α1+⋯+αm=n Vn(K1)α1n⋯Vn(Km)αmn suitable powers Vn(Ki) Ki, i=1,…,m, is lower bound V(K1[α1],…,Km[αm]), where αi multiplicity which Ki appears volume. It has been conjectur...

BACKGROUND Sarcolemmal Na/Ca exchange (NCX) regulates cardiac Ca and contractility. NCX function during the cardiac cycle is determined by intracellular [Ca] and [Na] ([Ca]i, and [Na]i) and membrane potential (Em), which all change in human heart failure (HF). Therefore, changes in NCX function may contribute to abnormal Ca regulation in human HF. METHODS AND RESULTS We assessed the cellular ...

The masses of the K1( 3P1) and K1( 1P1) are considered in a nonrelativistic constituent quark model, and the absolute value of the K1( 3P1) −K1(P1) mixing angle is determined to be about 59.29◦. Comparison of the theoretical predictions on the strong decay widths of the K1(1270) and K1(1400) in the 3P0 decay model as well as the production ratio of these two states in the τ decay between the av...

Hf-phosphinoamide cation complexes behave as metal-based frustrated Lewis pairs and bind one or two equivalent of CO2 and in as well can activate CO2 in a bimetallic fashion to give a pseudo-tetrahedral P2CO2 fragment linking two Hf centres.