Light Extinction Coefficient
Mostrando 1-12 de 13 artigos, teses e dissertações.
-
1. Remineralizing Potential of Nano-Silver-Fluoride for Tooth Enamel: An Optical Coherence Tomography Analysis
Abstract Objective: To evaluate the use of nanosilver fluoride in the enamel remineralization process through optical coherence tomography. Material and Methods: All samples were submitted to demineralization process by pH cycling during 14 days and randomly distributed into three groups (n = 11): Nanosilver Fluoride (NSF), Sodium fluoride (NaF), and negat
Pesqui. Bras. Odontopediatria Clín. Integr.. Publicado em: 10/10/2019
-
2. Classes de perfilhos na composição do índice de área foliar em pastos de capim-elefante
O trabalho foi conduzido de outubro de 2002 a abril de 2003, em Coronel Pacheco, MG, com o objetivo de avaliar os efeitos da altura do resíduo pós-pastejo (50 e 100 cm) sobre a radiação fotossinteticamente ativa (RFA) interceptada pelo dossel e o coeficiente de extinção luminosa; a contribuição relativa de classes de perfilhos (basais e aéreos) sobr
Pesquisa Agropecuária Brasileira. Publicado em: 2011
-
3. Differential proteomics and physiological characterization of two clones of Coffea canephora under water deficit / Proteômica diferencial e caracterização fisiológica de dois clones de Coffea canephora sob déficit hídrico
Understanding the mechanisms by which plants respond to water stress is crucial to predict the climate change impacts on crop productivity and ecosystems. Plants have long- distance root-to-shoot signaling mechanisms that generate the orchestration of adaptive responses. Root system signaling, as well as shoot, is often considerate important in growth contro
Publicado em: 2008
-
4. "Síntese química de derivados hidrossolúveis da rutina: determinação de suas propriedades físico-químicas e avaliação de suas atividades antioxidantes" / The chemical synthesis of water-soluble derivatives of rutin: determination of its physico-chemical properties and evaluation of its antioxidants activities.
Rutin is a glycoside flavonol which belongs to an important class of flavonoids, being extensively found in the nature. It presents a therapeutical importance due to improve the resistance and permeability of capillaries vessels, and is able to suppress free radical processes in some stages. The fruit of the faveiro (Dimorphandra mollis Benth., a Brazilian n
Publicado em: 2005
-
5. Ecologia do fitoplÃncton de um ambiente tropical hipersalino (Rio Pisa Sal, Galinhos, Rio Grande do Norte, Brasil)
The environments at the Northeast coast of Rio Grande do Norte State are under strong anthropic stress (mainly oil exploration, salt production and marine shrimp culture expansion etc). The present study was conducted in the Pisa Sal River estuary, which belongs to Galinhos-Guamarà ecocomplex, and provides the main water supply and drainage to the Camarus s
Publicado em: 2004
-
6. Modelling lucerne (Medicago sativa L.) crop response to light regimes in an agroforestry system
The general goal of this research was to understand the agronomic and physiological changes of a lucerne crop in distinct physical radiation environments and to verify the potential of lucerne to grow under shaded conditions. To achieve this, the research was conducted in four main steps: (i) firstly, experimental data collection in the field using two artif
Publicado em: 2002
-
7. Transient kinetics of the rapid shape change of unstirred human blood platelets stimulated with ADP.
Unstirred (isotropic) suspensions of human blood platelets stimulated with ADP in a stopped-flow laser turbidimeter exhibit a distinct extinction maximum during the course of the classical rapid conversion of initially smooth flat discoid cells to smaller-body spiny spheres. This implies the existence of a transient intermediate having a larger average light
-
8. Comparison of time-resolved and -unresolved measurements of deoxyhemoglobin in brain.
Continuous (CW) and pulsed light were used for the noninvasive measurement of hemoglobin oxygenation in tissues. A dual wavelength method of continuous illumination spectroscopy used 760 nm (deoxyhemoglobin peak) and 800 nm (an oxyhemoglobin-deoxyhemoglobin isosbestic point) to measure the kinetics and extent of oxyhemoglobin deoxygenation in brains during m
-
9. Optimized codon usage and chromophore mutations provide enhanced sensitivity with the green fluorescent protein.
The green fluorescent protein (GFP) from Aequorea victoria is a versatile reporter protein for monitoring gene expression and protein localization in a variety of cells and organisms. Despite many early successes using this reporter, wild type GFP is suboptimal for most applications due to low fluorescence intensity when excited by blue light (488 nm), a sig
-
10. Palmitoylation of bovine opsin and its cysteine mutants in COS cells.
Previously, bovine rhodopsin has been shown to be palmitoylated at cysteine residues 322 and 323. Here we report on palmitoylation of bovine opsin in COS-1 cells following expression of the synthetic wild-type opsin gene and several of its cysteine mutants in the presence of [3H]palmitic acid. Two moles of palmitic acid are introduced per wild-type opsin mol
-
11. Initial characterization of site-directed mutants of tyrosine M210 in the reaction centre of Rhodobacter sphaeroides.
A description of the properties of site-directed mutants of the reaction centre (RC) of Rhodobacter sphaeroides is presented. The residue tyrosine M210 (YM210) has been changed to phenylalanine (FM210) and leucine (LM210). Both mutants grew photoheterotrophically under conditions of high light but only the FM210 mutant grew under low light. Photobleaching sp
-
12. Production of molybdenum-coordinating compound by Bacillus thuringiensis.
Bacillus thuringiensis (ATCC 10792) produces a molybdenum reactive compound (given the trivial name chelin) during growth on iron-deficient medium. This compound accumulates in the culture medium in direct relation to the amount of L-arginine added and reaches a maximum concentration 24 to 48 h after the stationary phase of growth. Chelin absorbs light in th