Results 41 to 50 of about 5,701,527 (195)

A Study on Pattern Machining Technology for Germanium Materials Using Grooving Machining Process [PDF]

한국정밀공학회지
In the optical systems field, key components such as spectroscopic elements often require the use of optical materials with high-refractive indices to achieve miniaturization and lightweight characteristics.
Joong Kyu Ham, Jong Gyun Kang, Hwan Ho Maeng, Seong Hyeon Park, Jin Yong Heo, Young Durk Park, Geon Hee Kim   +6 more
doaj   +1 more source

A spectroscopic study of sunscreens [PDF]

, 2000
Exposure to UV radiation is known to result in the development of skin cancer and the use of protectants m the form of topically applied sunscreens is becoming widespread.
Jones, Allison Elizabeth
core  

Molecular weight fractionation and as binding mechanisms of dissolved organic matter in tea plantation soils

Ecotoxicology and Environmental Safety
Understanding the molecular-scale heterogeneity of dissolved organic matter (DOM) in tea plantation soils is essential for explaining regional differences in tea quality and mitigating contaminant risks.
Youru Yao, Yanhao Li, Jie Fang, Chonghong Zhang, Lian Sun, Huarong Tan, Zichen Li, Yuesheng Lin, Xiaohan Wang, Pingjiu Zhang   +9 more
doaj   +1 more source

The Spectroscopic Binary Characteristics of the Mercury-Manganese Stars

International Astronomical Union Colloquium, 1976
SummaryThe 80 confirmed and suspected mercury manganese stars identified prior to 1974 and north of declination -20° have been studied from 654 high dispersion spectrograms. (2.4 - 15 Å mm-1) for velocity and degree of peculiarity. The binary frequency based on velocity variability criteria alone appears to be a normal main sequence value of about 50%,
openaire   +3 more sources

Spectroscopic characteristics of humic acids originated in soils and lignite

Soil and Water Research, 2009
The aim of our work was to characterise the stability, humification degree, and principal classes of fluorophores in humic acids isolated from different matrices.
Ľubica POSPÍŠILOVÁ, Naděžda FASUROVÁ   +1 more
doaj   +1 more source

Spectroscopic Measurement: An Introduction to the Fundamentals

, 2002
Electromagnetism, quantum mechanics, statistical mechanics, molecular spectroscopy, optics and radiation form the foundations of the field. On top of these rest the techniques applying the fundamentals (e.g.
Linne, Mark A, Linne, Mark A.
core   +1 more source

1H- and 13C-NMR Analysis of a Series of 1,2-Diaryl-1H-4,5-dihydroimidazoles

Molecules, 2005
An analysis of the 1H- and 13C-NMR spectra of a series of 1,2-diaryl-1H-4,5-dihydroimidazoles and comparisons with 4,5-dihydroimidazoles having differentsubstitution patterns are presented.
Isabel A. Perillo, Alejandra Salerno
doaj   +1 more source

Novel insights into antimony mobilization in different high- antimony aquifers from the molecular signatures of dissolved organic matter

Ecotoxicology and Environmental Safety
The crucial role of the fluorescent components of dissolved organic matter (DOM) in controlling antimony (Sb) mobilization in groundwater has been confirmed. However, the molecular signatures contributing to Sb enrichment in DOM remain unknown.
Chunming Hao, Qianqian Sun, Ximeng Sun, Qiong Li   +3 more
doaj   +1 more source

Geometry-Dependent Spectroscopic Contrast in Deep Tissues

iScience, 2019
Summary: Nano-structures of biological systems can produce diverse spectroscopic effects through interactions with broadband light. Although structured coloration at the surface has been extensively studied, natural spectroscopic contrasts in deep ...
Xin Ge, Hongying Tang, Xianghong Wang, Xinyu Liu, Si Chen, Nanshuo Wang, Guangming Ni, Xiaojun Yu, Shufen Chen, Haitao Liang, En Bo, Lulu Wang, Cilwyn Shalitha Braganza, Chenjie Xu, Steven M. Rowe, Guillermo J. Tearney, Linbo Liu   +16 more
doaj   +1 more source

Application of spectroscopic technology with machine learning in Chinese herbs from seeds to medicinal materials: The case of genus Paris

Journal of Pharmaceutical Analysis
To ensure the safety and efficacy of Chinese herbs, it is of great significance to conduct rapid quality detection of Chinese herbs at every link of their supply chain.
Yangna Feng, Xinyan Zhu, Yuanzhong Wang
doaj   +1 more source