Diameter Structure Projection
Mostrando 1-9 de 9 artigos, teses e dissertações.
-
1. Diametric distribution modeling of forest species in arboreal Caatinga vegetation, Brazil
ABSTRACT The distribution modeling in diameter classes is an important indicator of the potential use of a forest community, as well as the projection of future forest production. The objective of this study was to evaluate the diametric structure and to select probabilistic density functions for three woody species in forested arboreal Caatinga vegetation i
Revista Ceres. Publicado em: 2022
-
2. Métodos de ajuste da função Weibull e seu desempenho na prognose do crescimento e produção de Eucalyptus dunnii
The main objective of this research was to develop a simulator system of growth and yield for unthinned plantations of Eucalyptus dunnii using different adjustment methods for the Weibull probability density function to describe the forest structure at various ages. The data used in this research came from measurements of 239 plots in E. dunnii stands in the
Publicado em: 2010
-
3. PADRÕES DE CRESCIMENTO E PREDIÇÃO DA ESTRUTURA DIAMÉTRICA COM AUXÍLIO DE BANDAS DENDROMÉTRICAS NA FLORESTA NACIONAL DE CAXIUANÃ - PA
In forest management it is fundamental that those in charge know how to plan the logging activities grounded on statistical tools so they can diminish error margins in important decision making situations. Knowledge about informations of growth pattern and diameter distribution projection leads to optimization of the production process. It is so because thos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/07/2008
-
4. The 8.5 A projection map of the light-harvesting complex I from Rhodospirillum rubrum reveals a ring composed of 16 subunits.
Two-dimensional crystals from light-harvesting complex I (LHC I) of the purple non-sulfur bacterium Rhodospirillum rubrum have been reconstituted from detergent-solubilized protein complexes. Frozen-hydrated samples have been analysed by electron microscopy. The crystals diffract beyond 8 A and a projection map was calculated to 8.5 A. The projection map sho
-
5. Analysis of the PilQ Secretin from Neisseria meningitidis by Transmission Electron Microscopy Reveals a Dodecameric Quaternary Structure
PilQ is a member of the secretin family of outer membrane proteins and is specifically involved in secretion of type IV pili in Neisseria meningitidis, Neisseria gonorrhoeae, and Pseudomonas aeruginosa. The quaternary structure of PilQ from N. meningitidis was analyzed by transmission electron microscopy by using a negative stain. Single particle averaging w
American Society for Microbiology.
-
6. Projection structure of the photosynthetic reaction centre–antenna complex of Rhodospirillum rubrum at 8.5 Å resolution
Two-dimensional crystals of the reaction-centre–light-harvesting complex I (RC–LH1) of the purple non- sulfur bacterium Rhodospirillum rubrum have been formed from detergent-solubilized and purified protein complexes. Unstained samples of this intrinsic membrane protein complex have been analysed by electron cryomicroscopy (cryo EM). Projection maps wer
Oxford University Press.
-
7. Three-Dimensional Structure of the Neisseria meningitidis Secretin PilQ Determined from Negative-Stain Transmission Electron Microscopy
The PilQ secretin from the pathogenic bacterium Neisseria meningitidis is an integral outer membrane protein complex which plays a crucial role in the biogenesis of type IV pili. We present here the first three-dimensional structure of this type of secretin at 2.5-nm resolution, obtained by single-particle averaging methods applied to the purified protein co
American Society for Microbiology.
-
8. Stereo-projection radiography in the study of the structural organisation of cat skull bones.
The relatively low resolution in the radiographs produced by clinical X-ray machines has led to the rejection, by a number of investigators, of this machine as a method of examining the detailed structural organisation of bone. In the recently developed microfocal X-ray unit a fine beam of electrons is focussed onto the side of a water cooled target. Stereo-
-
9. The nucleosomal core histone octamer at 3.1 A resolution: a tripartite protein assembly and a left-handed superhelix.
The structure of the octameric histone core of the nucleosome has been determined by x-ray crystallography to a resolution of 3.1 A. The histone octamer is a tripartite assembly in which a centrally located (H3-H4)2 tetramer is flanked by two H2A-H2B dimers. It has a complex outer surface; depending on the perspective, the structure appears as a wedge or as