Results 41 to 50 of about 11,766 (167)

L'amélioration des plantes tropicales [PDF]

, 1997
L'amélioration des plantes a connu au cours des dix dernières années une évolution rapide. D'une part, elle bénéficie désormais des outils biotechnologiques d'exploitation des ressources génétiques et de création de variétés, qui viennent enrichir les ...
Charrier, A. (ed.), Hamon, Serge (ed.), Jacquot, M. (ed.), Nicolas, D. (ed.)   +3 more
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Comparison of Gamma Sources (Cobalt and Cesium) for Density Measurement of Metals and Alloys via Using Transmission Technique

Journal of Engineering Technology and Applied Sciences, 2021
One of the solutions for density measurement is to make use of gamma-ray transmission technique. We studied by this technique, using by Co-60 and Cs-137. Each source, without materials in geometry, was counted and noted intensities as (I0). All materials were counted and noted intensities as (I). [I/I0] rates were calculated.
openaire   +3 more sources

Off-Line Data Evaluation of Elemental Maps Obtained from Scanning Nuclear Microprobe Analyses [PDF]

, 1992
The results of scanning nuclear microprobe (SNM) analyses are normally presented as elemental maps showing the number of detector events, acquired within a certain energy region, for every pixel irradiated.
Lövestam, N. E. G., Swietlicki, E.
core   +1 more source

The first result in the determination of the percentage concentration of sulfuric acid solution based on the gamma transmission technique with an energy of 662 ke

Science and Technology Development Journal - Natural Sciences, 2021
In this study, we propose an approach using the gamma transmission technique based on the combination of the experimental and simulated data for determining the percentage concentration of the acid solution. The experiment consists of a collimated 137Cs radioactive source emitting a narrow gamma beam of 662 keV and a NaI(Tl) detector.
Tam Duc Hoang, Linh Thi Truc Nguyen, Trang Thi Ngoc Le, Sang Thanh Truong, Chuong Dinh Huynh   +4 more
openaire   +2 more sources

Prevalence and Transmission of Beta and Gamma Human Papillomavirus in Heterosexual Couples

Open Forum Infectious Diseases, 2017
Background Beta (β) and gamma (γ) human papillomavirus (HPV) are commonly found on the skin. Few of the β types are associated with nonmelanoma skin cancer.
A. Moscicki, Yifei Ma, T. Gheit, Sandrine McKay-Chopin, S. Farhat, Lea E. Widdice, M. Tommasino   +6 more
semanticscholar   +1 more source

Fast Neutron Scattering and Attenuation Technique for Measurement of Void Fractions and Phase Distribution in Transient Flow Boiling [PDF]

, 1978
Title: Fast Neutron Scattering and Attenuation Technique for Measurement of Void Fractions and Phase Distribution in Transient Flow Boiling, Author: Peter S. L.
Yuen, Peter S.L.
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Gamma oscillation plasticity is mediated via parvalbumin interneurons

Science Advances
Understanding the plasticity of neuronal networks is an emerging field of (patho-) physiological research, yet the underlying cellular mechanisms remain poorly understood. Gamma oscillations (30 to 80 hertz), a biomarker of cognitive performance, require
M. Hadler, Alexandra Tzilivaki, Dietmar Schmitz, H. Alle, Jörg R. P. Geiger   +4 more
semanticscholar   +1 more source

Targeting Neural Oscillations for Cognitive Enhancement in Alzheimer's Disease [PDF]

Alzheimer's disease (AD), the most prevalent form of dementia, is marked by progressive cognitive decline, affecting memory, language, orientation, and behavior.
Benussi, Alberto, Manganotti, Paolo, Palacino, Federica   +2 more
core   +1 more source

Examination for Practical Use in Dual Energy Gamma-ray Transmission Techniques. Application to Grading of Gold Alloys.

RADIOISOTOPES, 1995
For practical use of dual energy gamma-ray transmission techniques in various fields, necessary conditions have been examined experimentally.The study revealed the necessary conditions shown in the following : (1) the shape and size of the collimator aperture for a gamma-ray beam must be changed according to those of a sample to be measured, (2) a ...
Iwao UMEDA, Toshio MUTO, Raita KITSUTAKA, Takuo NONOMURA   +3 more
openaire   +2 more sources

Application of Remote Sensing to the Chesapeake Bay Region. Volume 1: Executive summary [PDF]

The proceedings are presented of a conference, jointly sponsored by the National Aeronautics and Space Administration, the U.S. Environmental Protection Agency, and the University of Maryland. The purpose of the Conference was to assemble representatives
Adler, I., Chen, W. T., Freas, G. W., Jr., Hickman, G. D., Laurie, V. J., Pemberton, D. A., Wilkerson, T. D.   +6 more
core   +1 more source