Results 21 to 30 of about 5,701,527 (195)

Effect of Keratin Fibers on Setting and Hydration Characteristics of Portland Cement

Journal of Natural Fibers, 2021
The study investigated the effect of keratin fibers from waste chicken feather on the hydration characteristics of Type I Portland cement. The effect of varying amount of fibers on cement setting time, thermal and spectroscopic characteristics was ...
Rosalie C. Mendoza, Jeanette O. Grande, Menandro N. Acda   +2 more
doaj   +1 more source

Spectroscopic Tracking of the Characteristics of Microplastic-Derived Dissolved Organic Matter

Separations, 2023
Microplastic-derived dissolved organic matter (MP-DOM) has received increasing attention in recent years. In this study, the fluorescence excitation-emission matrix (EEM) combined with parallel factor analysis (PARAFAC) was used to track the leaching ...
Mengna Yuan, Huiqing Xiang, Yang Tong, Kanggen Zhou, Changhong Peng, Wei Chen   +5 more
doaj   +1 more source

Glass transition temperature and thermal expansion behaviour of polymer films investigated by variable temperature spectroscopic ellipsometry

, 2022
S.803-807We report investigations of the glass transition temperature and the thermal expansion behaviour of 25-10- mu m thick PMMA films coated on Si wafers. A spectroscopic ellipsometer equipped with an oven, temperature control and data analysis fully
Metzner, H., Zawatzki, C., Uhlig, C., Kahle, O., Wielsch, U., Bauer, J.   +5 more
core   +1 more source

FT-IR spectroscopic characteristics of differently cultivated Escherichia coli

Czech Journal of Food Sciences, 2008
FT-IR spectra were recorded of Escherichia coli cell mass with the aim of obtaining spectral traits possibly useful in a rapid detection and characterisation of this indicator bacterium.
Zdenek FILIP, SUSANNE HERMANN, KATEŘINA DEMNEROVÁ   +2 more
doaj   +1 more source

Spectroscopic characteristics of humates isolated from different soils

Soil and Water Research, 2011
Spectral characterisation of soil humic substances is one of the important methods for their quality identification. In this work, two optical methods (UV-VIS and SFS) were used.
Naděžda FASUROVÁ, Lubica POSPÍŠILOVÁ   +1 more
doaj   +1 more source

Spectroscopic Characteristics and Color Origin of Red Tourmaline from Brazil

Journal of Spectroscopy, 2022
In the present paper, I report on the spectroscopic study for tourmaline color origin, performed red samples from Minas Geras State, Brazil, by gemological routine testing, X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet-visible ...
Ming Li
doaj   +1 more source

Mineral Compositions and Organic Color-Related Compounds of Freshwater Bead-Cultured Pearls from Zhuji, Southeast China: Insights from Multi-Spectroscopic Analyses

Crystals
Freshwater bead-cultured pearls (FWBCPs) from Zhuji, China, have gained significant market prominence due to their large size, unique pearl luster, and diverse color.
Xi Li, Xiao-Yan Yu, Cun Zhang
doaj   +1 more source

Spectroscopic and lasing characteristics of samarium doped glass fibre [PDF]

IEE Proceedings J Optoelectronics, 1990
The fluorescence spectra of trivalent samarium doped glass fibres are described. In silica glass Sm3+ has a narrow fluorescence of 2.2 nm f.w.h.m. at a wavelength of 650 nm. The influence of fluorescence line narrowing and large external electric fields on this line is reported.
Farries, M.C., Morkel, P.R., Townsend, J.E.   +2 more
openaire   +1 more source

Magnetic and spectroscopic characteristics of ZnMnO system

Applied Surface Science, 2005
We report on the observation of room-temperature ferromagnetism in epitaxial (Zn,Mn)O films grown by a pulsed-laser deposition technique using high-density targets. The X-ray, microscopic, spectroscopic and magnetic properties of target material containing 6 at.% of Mn and films were compared.
Pradhan, Aswini K., Hunter, D., Zhang, Kai, Dadson, J.B., Mohanty, S., Williams, T.M., Lord, K., Rakimhov, R.R., Roy, U.N., Cui, Y., Burger, A., Zhang, Jun, Sellmyer, David J.   +12 more
openaire   +2 more sources

Comparative Study of Gemological and Spectroscopic Features and Coloration Mechanism of Three Types of Spodumene

Crystals
Spodumene is a characteristic mineral in lithium-rich granitic pegmatites, serving both as a valuable mineral resource and an important gem material. This study incorporates three different color varieties of spodumene—pink to violet, yellow-green, and ...
Zijia Zhou, Jing Liu, Kui He, Biao Yang, Yinghua Rao   +4 more
doaj   +1 more source