delta-Aminolevulinic acid, the biosynthetic precursor of tetrapyrroles, is synthesized from glutamate via the tRNA-dependent five-carbon pathway in the green sulfur bacterium Chlorobium vibrioforme. The enzyme glutamyl-tRNA reductase (GTR), encoded by the hemA gene, catalyzes the first committed step in this pathway, which is the reduction of tRNA-bound glutamate to produce glutamate 1-semialde...

Maximum likelihood estimation of phylogenetic trees from nucleotide sequences is completely consistent when nucleotide substitution is governed by the general time reversible (GTR) model with rates that vary over sites according to the invariable sites plus gamma (I + gamma) distribution.

introduction: three-dimensional (3d) scanners are widely used in medicine. one of the applications of 3d scanners is the acquisition of anthropometric dimensions for ergonomics and the creation of an anthropometry data bank. the aim of this study was to evaluate the precision and accuracy of a modified 3d scanner fabricated in this study. methods: in this work, a 3d scan of the human body was o...

In this paper, a new fractional Riccati equation rational expansion method is proposed to establish new exact solutions for fractional differential equations. For illustrating the validity of this method, we apply it to the nonlinear fractional Sharma-TassoOlever (STO) equation, the nonlinear time fractional biological population model and the nonlinear fractional foam drainage equation. Compar...

In this paper, we analyze the role of technical standards in the domain of learning technology, focusing on the way they enable interoperability. We briefly explain some of the alternatives to open and accredited standards and how they impact on the community. The standardization process is analyzed in some detail and the most relevant organizations involved are briefly surveyed. We provide an ...

Gate-First Processing M. Chudzik, B. Doris, R. Mo, J. Sleight, E. Cartier, C. Dewan, D. Park, H. Bu, W. Natzle, W. Yan, C. Ouyang, K. Henson, D. Boyd, S. Callegari, R. Carter, D. Casarotto, M. Gribelyuk, M. Hargrove, W. He, Y. Kim, B. Linder, N. Moumen, V.K. Paruchuri, J. Stathis, M. Steen, A. Vayshenker, X. Wang, S. Zafar, T. Ando, R. Iijima, M. Takayanagi, V. Narayanan, R. Wise, Y. Zhang, R. ...

We introduce a general way to locate programmer mistakes that are detected by static analyses such as type checking. The program analysis is expressed in a constraint language in which mistakes result in unsatisfiable constraints. Given an unsatisfiable system of constraints, both satisfiable and unsatisfiable constraints are analyzed, to identify the program expressions most likely to be the c...

Reviewer #1 In summary, the General Management In-Basket is a sound test of management skills...The results will be informative to the candidates, and their acceptance of the test should be favorable..." Reviewer #2 "In comparison to assessment centers, the GMIB provides a similar level of validity at significantly lower cost... In short, the GMIB should be seriously examined by any organizatio...

INTRODUCTION The use of guided tissue regeneration (GTR) techniques has been proposed as an adjunct to endodontic surgery in order to promote bone healing. Studies assessing the added benefits of GTR for the outcome of endodontic surgery are significantly variable in their treatment protocols, follow-up periods, and inclusion criteria, thus generating inconsistent and confusing results. The aim...