Results 11 to 20 of about 16,532 (301)

Mineral Composition and Genesis of Black Quartzite Jade from Linwu County, Hunan Province

open access: yesYankuang ceshi, 2021
BACKGROUND Black quartzite jade is a type of commonly and commercially available jade. Many areas produce this gem. OBJECTIVES To analyze the gemological characteristics and mineral composition of the jade samples and to discuss their genesis.
MIAO Xu, SHI Miao, WANG Li-sheng
doaj   +1 more source

Characterization of polymer-liquid crystal blends [PDF]

open access: yesJournal of the Serbian Chemical Society, 2001
Blends of semi-crystalline polymers (polyethylene adipate and two poly(ester-urethane) s) with liquid crystal cholesteryl palmitate with different compositions were prepared by solution casting.
DOINA MACOCINSCHI   +2 more
doaj   +3 more sources

Application of the fluorescence light microscopy in the textural study of portland cement clinker

open access: yesMateriales de Construccion, 1987
The application of fluorescence light microscopy in the textural study of Portland cement clinker, specially its porosity, is presented. Principles and types of the technique are commented and the suggested sample preparation method is described. The use
Ángel Rodríguez Rey   +4 more
doaj   +1 more source

Demineralization adjacent to orthodontic brackets with fluoride releasing and conventional bonding agents

open access: yesIndian Journal of Dental Research, 2016
Background: Enamel demineralization is an event which is always an integral part of fixed orthodontic treatment due to which fluoride releasing bonding agents are considered to be the most effective but have lower bond strength. Thus, this in vitro study
Gopinath Swapna   +3 more
doaj   +1 more source

Forensic examination of plastic drinking straws based on their physical characteristics and manufacturing marks

open access: yesForensic Sciences Research, 2020
This work highlights the evidential value of examining plastic drinking straws to establish linkages between multiple sources for forensic intelligence, investigative or prosecution purposes. Plastic drinking straws are commonly encountered in drug cases,
Alaric C.W. Koh   +5 more
doaj   +1 more source

Physical Modification of PLA for Increasing Its Durability (Polarizing Light Microscopy Study)

open access: yesProceedings, 2019
The European Strategy for plastic materials in a circular economy underlines the importance of using renewable polymers for long-lasting applications. [...]
Beatrice Girbaciu   +4 more
doaj   +1 more source

Instantaneous mapping of liquid crystal orientation using a polychromatic polarizing microscope

open access: yes, 2022
Polarizing microscopy brought about many advancements in the science of liquid crystals and other soft materials, including those of biological origin.
Oleg Lavrentovich (14363079)   +2 more
core   +1 more source

Effect of vitamin A administration in gamma-irradiated repair tissue as revealed by polarizing microscopy

open access: yesBrazilian Journal of Oral Sciences, 2015
This work was performed in order to evaluate the effect of systemic administration of vitamin A against the damages caused by gamma radiation in rat repair tissue. It were used 48 animals.
Patricia Maria Usberti Vizioli   +4 more
doaj   +1 more source

Z-polarized confocal microscopy

open access: yesJournal of Biomedical Optics, 2001
In light microscopy the transverse nature of the electromagnetic field precludes a strongly focused longitudinal field component, thus confining polarization spectroscopy and imaging to two dimensions (x,y). Here we describe a simple confocal microscopy arrangement that optimizes for signal from molecules with transition dipoles oriented parallel to ...
Huse, N., Schoenle, A., Hell, S.
openaire   +6 more sources

Synthesis, liquid crystalline behaviour and structure–property relationships of 1,3-bis(5-substituted-1,3,4-oxadiazol-2-yl)benzenes

open access: yesBeilstein Journal of Organic Chemistry, 2020
Two series containing 1,3-bis(1,3,4-oxadiazol-2-yl)benzene as a rigid core (RC) and alkyl or perfluoroalkyl as terminal chains were synthesized and characterized. Liquid crystal properties of the synthesized compounds have been investigated by polarizing
Afef Mabrouki   +4 more
doaj   +1 more source

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