We introduce “endomorphic presentations”, or L-presentations: group presentations whose relations are iterated under a set of substitutions on the generating set, and show that a broad class of groups acting on rooted trees admit explicitly constructible finite L-presentations, generalising results by Igor Lysionok and Said Sidki.

Biological nitrogen fixation is usually inhibited by fixed nitrogen. Paenibacillus sabinae T27, a Gram-positive, spore-forming diazotroph, possesses high nitrogenase activity and has 3 copies of nifH (nifH, nifH2, nifH3), copy nifDK, multiple nifHDK-like genes. In this study, we found that P. T27 showed activities not only in low (0–3 mM) concentrations NH4+ but also (30–300 NH4+, no matter whe...

Deepak Srivastava,* Madhu Menon, and KyeongJae Cho NASA Ames Research Center, CSC, Mail Stop T27-A1, Moffett Field, California 94035-1000 Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 Center for Computational Sciences, University of Kentucky, Lexington, Kentucky 40506-0045 Department of Mechanical Engineering, Stanford University, Stanford, Californ...

The aim of this research was to present a description the somatotipes volleyball players in Pekalongan Regency. This descriptive study using one shoot model approach. Data collection techniques used anthropometric tests and measurements. There were 10 components measured, namely weight measured digital scale, height stadiometer, thickness fat on triceps, subscapular, suprailiac, calves skinfold...

OBJECTIVES To determine whether there is an association between a player's physique and injuries incurred while playing rugby football. METHODS A cohort study was carried out involving all senior rugby clubs in the Scottish Borders during the 1993-1994 rugby season. Somatotype estimates were determined for 1152 (95%) of the 1216 eligible players. Body mass index (BMI), chest to waist ratio, a...