A complete theoretical model of the nuclear spin conversion in CH3F induced by intramolecular ortho-para state mixing is proposed. The model contains parameters determined from the level-crossing spectra of the CH3F spin conversion. This set of parameters includes the ortho-para decoherence rate, the magnitude of the hyperfine spin-spin interaction between the molecular nuclei and the energy ga...

The aim of this study was to use meta-analysis to identify the enteric methane (CH4) mitigation strategy that reduced CH4 emission without lowering production. To this end, a database initially developed was updated, compiling data from 61 publications (233 experiments) for various observations in dairy cattle on effects of hydrogen sink (H-sink), ionophore, lipid and conc...

We consider a (semi-)relativistic spin-1/2 particle interacting with quantized radiation. The Hamiltonian has the form Ĥ c := {c2[(p + A) +σ ·B] + (mc2)2}1/2 −mc2 +V +Hf . Assuming that the potential |V | is bounded with respect to the momentum |p|, we show that Ĥ c converges in norm-resolvent sense to the usual Pauli-Fierz operator when c, the speed of light, tends to ∞.

Let H be a connected subgraph of graph G. An H-factor G is spanning whose components are isomorphic to H. Given set mutually non-isomorphic graphs, uniform H-factorization partition the edges into H-factors for some H∈H. In this article, we give complete solution existence problem H-factorizations Kn−I (the obtained by removing 1-factor from Kn) H={Ch,S(Ch)}, where Ch cycle length an even integ...

Objectives: This study aimed to compare the in vitro cytotoxic activity of propolis, a bioactive material made by the honeybee, and calcium hydroxide (CH) and their effect on formation of mineralized nodules by human dental pulp stem cells (HDPSCs). Methods: In this in vitro study, HDPSCs were obtained from the Cellular and Molecular Oral Biology Laboratory of School of Dentistry, Shahid Behesh...

congenital hypothyroidism is a condition of thyroid hormone deficiency. approximately 1 in 4000 newborn infants has a deficiency of thyroid function. the aim of this study is determination of the prevalence of permanent and transient congenital hypothyroidism (ch) in yazd, iran.from may 2006 to june 2008, 35377 newborns were screened by measuring serum tsh obtained by heel prick. the neonates w...

objectives: this study aimed to compare the in vitro cytotoxic activity of propolis, a bioactive material made by the honeybee, and calcium hydroxide (ch) and their effect on formation of mineralized nodules by human dental pulp stem cells (hdpscs). methods: in this in vitro study, hdpscs were obtained from the cellular and molecular oral biology laboratory of school of dentistry, shahid behesh...