Ascidian embryogenesis is regarded as a typical 'mosaic' type. Recent studies have provided convincing evidence that components of the posterior-vegetal cytoplasm of fertilized eggs are responsible for establishment of the anteroposterior axis of the embryo. We report here isolation and characterization of a novel maternal gene, posterior end mark (pem). After fertilization, the pem transcript ...

with the rapid growth of indoor wireless communication systems, the need to accurately model radio wave propagation inside the building environments has increased. many site-specific methods have been proposed for modeling indoor radio channels. among these methods, the ray tracing algorithm and the finite-difference time domain (fdtd) method are the most popular ones. the ray tracing approach ...

BACKGROUND It is not clear which educational strategy is most effective in helping patients to change their lifestyles. This study compared the efficacy of two different educational models on reducing blood pressure (BP). METHODS This was a randomized controlled trial in ambulatory hypertensive patients >65 years of age. Workshops that aimed to develop self-management and patient empowerment ...

[1] We present concentration distributions of C1-C4 alkyl nitrates observed during the NASA airborne campaigns Pacific Exploratory Mission (PEM) -Tropics A (September– October 1996) and PEM-Tropics B (March–April 1999). The total geographic range for PEM-Tropics A was 45 N–72 S latitude and 153 E–75 W longitude, and for PEMTropics B was 40 N–36 S latitude and 149 E–75 W longitude. The maximum a...

Among a number of alternative energy sources, hydrogen is treated as one of the most promising candidates, due to the reason that it can be applied to a fuel cell as an input to provide electricity through an electrochemical reaction. On top of that, high conversion efficiency up to 40 to 60% is seen in a fuel cell. The first application of a Proton Exchange Membrane (PEM) fuel cell was as an a...

Com base em um movimento diacrônico de pesquisas e experiências formativas, este artigo apresenta texto natureza reflexiva interpretativa sobre ações formação indícios decorrentes delas que permitem compreender o papel do trabalho com tarefas matemáticas na/para a Professores Ensinam Matemática (PEM). Nesse movimento, são sublinhadas três contextos formativos PEM, alicerçadas no matemáticas: re...

A photoassisted oxygen reduction reaction (ORR) through I(-)/I3(-) redox couple was investigated for proton exchange membrane (PEM) fuel cell cathode reaction. The I(-)/I3(-)-based liquid cathode was used to replace conventional oxygen cathode, and its discharge product I(-) was regenerated to I3(-) by photocatalytic oxidation with the participation of oxygen. This new and innovative approach m...

This document specifies how the services of MIME and PEM can be used in a complementary fashion. MIME, an acronym for "Multipurpose Internet Mail Extensions", defines the format of the contents of Internet mail messages and provides for multi-part textual and non-textual message bodies. PEM, an acronym for "Privacy Enhanced Mail", provides message authentication/integrity and message encryption...