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Modulation Possibilities of the Tissue Wettability, Marker of the Physical Modifications Produced by Senescence versus Photo Senescence at Tegument Level

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Journal of Biomedical Science and Engineering 2014年第13期7卷 1049-1055页

作者： Laurentiu Badescu Carmen Elena Cotrutz Raoul Lupusoru bogdan-Mihail diaconescu Manuela Ciocoiu Magda Badescu Department of Cell and Molecular Biology University of Medicine and Pharmacy “Grigore T. Popa” Iasi Romania Department of Pathophysiology University of Medicine and Pharmacy “Grigore T. Popa” Iasi Romania Department of Pathophysiology University of Medicine and Pharmacy “Grigore T. Popa” Iasi Romania

We used an experimental model involving white Westar rats (young and old) who were subjected to precise doses of ultraviolet radiation (UV). The experiment aims to examine the influence of epidermis potential protection factors in photo senescence versus senescence. We have studied the in vivo effect of some natural polyphones extracted from black grapes seeds and zinc aspartate and in vitro effect of AED (deuterium depleted water). The substances were administered by intragastric gavages, at two days intervals for two weeks prior to UV irradiation and during the entire period of the experiment (28 days). In the end, we determined the degree of hydrophilicity of the skin, in vitro, by measuring the contact angle value, which was inversely proportional to the hydrophilicity of the tissue (the angle formed at the contact between a liquid and a solid surface). Using this method we found a large variability depending on the hydrophilicity of the epidermis (abdomen and back), the age of the animal and UV/non UV irradiation. The maintenance of the epidermis fragments in AED (for 6 hours) increased significantly the tissue wet ability degree both in the young rats subject to UV and in the senescent ones subject to UV (photo senescence).

关键词： Skin Photoimmunology Phototherapy

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10 PW peak power femtosecond laser pulses at ELI-NP

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High Power Laser Science and Engineering 2022年第3期10卷 25-29页

作者： Christophe Radier Olivier Chalus Mathilde Charbonneau Shanjuhan Thambirajah Guillaume Deschamps Stephane David Julien Barbe Eric Etter Guillaume Matras Sandrine Ricaud Vincent Leroux Caroline Richard François Lureau Andrei Baleanu Romeo Banici Andrei Gradinariu Constantin Caldararu Cristian Capiteanu Andrei Naziru bogdan diaconescu Vicentiu Iancu Razvan Dabu Daniel Ursescu Ioan Dancus Calin Alexandru Ur Kazuo ATanaka Nicolae Victor Zamfir Thales LAS France 78990ÉlancourtFrance Thales Systems Romania 060071 BucurestiRomania Extreme Light Infrastructure-Nuclear Physics IFIN-HH077125 MagureleRomania Physics Doctoral School Bucharest University077125 MagureleRomania Laser Engineering Osaka UniversityOsaka 565-0871Japan

We report on the generation and delivery of 10.2 PW peak power laser pulses,using the High Power Laser System at the Extreme Laser Infrastructure–Nuclear Physics *** this work we demonstrate for the first time,to the best of our knowledge,the compression and propagation of full energy,full aperture,laser pulses that reach a power level of more than 10 PW.

关键词： high-power laser ultra-short laser pulses

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New Linkage with Linear Actuator for Tracking PV Systems with Large Angular Stroke

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Chinese Journal of Mechanical Engineering 2011年第5期24卷 744-751页

作者： VISA Ion diaconescu Dorin SAULESCU Radu VATASESCU Monica BURDUHOS bogdan Renewable Energy Systems and Recycling Research Centre Transilvania University of Brasov

This paper focuses on the development of an optimized photovoltaic tracking system involving low-cost, relative simple mechanisms, with linear actuators able to insure strokes comparable with those resulted when using gear rotary actuators. Starting with a rhombus linkage, with a linear actuator on the diagonal used for the elevation motion till 90°, a new performance solution is generated. This new linkage allows large angular strokes by using an asymmetric rhombus and an eccentrically positioned linear actuator. The paper can be divided in three main parts. Firstly the kinematical modeling of the new linkage is addressed, which permits the establishing of the linkage dimensions according to two adjustable parameters （k2, k5）. Using the resulted correlations, in the second part the linkage synthesis algorithm is developed; the steps followed in this algorithm are presented in a numerical application considering a tracked PV platform, where the azimuthal vertical movement is obtained with the new proposed rhomboidal linkage. In the last part of the paper an analysis is done with the aim of determining the PV platform tracking efficiency （which represents the ratio between the received and the available beam solar energy） using the new linkage, in the meteorological conditions of Brasov, Romania implementation site.

关键词： solar tracking linkage linear actuator angular stroke transmission angle

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