Results 61 to 70 of about 580,457 (303)

Dehydroxylation of Minerals of Gadisunkapur Area with Special Reference to FTIR and Thermal Study

open access: yesInternational Journal of Economic and Environment Geology, 2020
This paper attempts to explain the presence of OH group for micas along with some sulfate, chlorite, quartz and feldspar minerals. These minerals are found to be associated with barite vein, metasediments (quartz-chlorite schist ...
Marularadhya C. Hiremath, A. Sreenivasa
doaj   +1 more source

A New Materials and Design Approach for Roads, Bridges, Pavement, and Concrete [PDF]

open access: yes, 2020
Increased understanding of demand for transport energy and how to improve road pavement materials would enable decision makers to make environmental, financial, and other positive changes in future planning and design of roads, bridges, and other ...
Acharya, Tathagata   +4 more
core   +1 more source

Fourier transform infrared cell for surface studies at controlled temperatures and in controlled atmospheres with time resolution and spatial resolution [PDF]

open access: yes, 1996
A new micro-Fourier transform infrared cell has been constructed and evaluated using (i) the transformation of aurichalcite crystals at 298-475 K, (ii) the adsorption/desorption of pyridine on a Cu2O/ZnO junction, and (iii) the adsorption of CO on Pt ...
Greek B. F., P. A. Sermon, V. A. Self
core   +1 more source

MnI‐Functionalized Covalent Organic Framework as Efficient Electrocatalyst for CO2 Reduction in a Catholyte‐Free Zero‐Gap Electrolyzer

open access: yesAdvanced Functional Materials, EarlyView.
This work demonstrates the successful integration of a phenanthroline‐based 2D COF with MnI catalytic sites into a catholyte‐free membrane‐electrode‐assembly cell for CO2 electroreduction. The crystalline COF actively suppresses Mn⁰–Mn⁰ dimerization, achieving a turnover frequency of 617 h⁻¹ at 2.8 V (full‐cell potential), and enabling stable operation.
Laura Spies   +8 more
wiley   +1 more source

Low-temperature plasma-modified zeolite (LTPMZ) vs. natural Bulgarian zeolite (NBZ) – Comparative physicochemical, UV/VIS and FTIR studies

open access: yesMacedonian Journal of Chemistry and Chemical Engineering, 2016
The aim of the present study was to investigate and compare the physicochemical, morphological properties and sorption potential of natural Bulgarian zeolite (NBZ) and low-temperature plasma modified zeolite (LTPMZ).
Zvezdelina Yaneva   +2 more
doaj   +1 more source

Acetylation of Raw Cotton for Oil Spill Cleanup Application: an FTIR and 13-C MAS NMR Spectroscopic Investigation [PDF]

open access: yes, 2004
Fourier transform infrared (FTIR) and 13C MAS NMR spectroscopy have been used to investigate the acetylation of raw cotton samples with acetic anhydride without solvents in the presence of different amounts of 4-dimethylaminopyridine (DMAP) catalyst ...
Adebajo, Moses, Frost, Raymond
core   +2 more sources

Laser‐Induced Graphene from Waste Almond Shells

open access: yesAdvanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova   +9 more
wiley   +1 more source

PENGARUH TOREFAKSI TERHADAP SIFAT KIMIA PELET TANDAN KOSONG KELAPA SAWIT

open access: yesJurnal Teknik Pertanian Lampung, 2020
Limbah padat perkebunan sawit yang relatif mudah dijumpai ialah tandan kosong kelapa sawit (TKKS). Biomassa TKKS dikonversikan menjadi pelet untuk mendapatkan ukuran yang seragam, kemudian ditorefaksi untuk digunakan sebagai bioenergi sehingga ...
Irma Thya Rani   +5 more
doaj   +1 more source

ИЗУЧЕНИЕ ЛАКОВОГО ИЗДЕЛИЯ ИЗ РАСКОПАННЫХ ХУННУСКИХ КУРГАНОВ В ДОЛИНЕ ТАМИРА, АРХАНГАЙ (Монголия)

open access: yesТеория и практика археологических исследований, 2019
Империя хунну/сюнну (конец III в. до н.э. - I в. н.э.) контролировала центрально-азиатские регионы Шелкового пути; экономические и культурные отношения с империей Хань подтверждается наличием китайских лакированных изделий в археологических памятниках ...
С. Саран   +4 more
doaj   +1 more source

FTIR-based Fingerprinting and Chemometrics for Rapid Investigation of Antioxidant Activity from Syzygium polyanthum Extracts

open access: yesIndonesian Journal of Chemistry, 2020
Syzygium polyanthum, known as salam in Indonesia, which is rich in phenolics compounds with high antioxidant activity. In this study, we performed the determination of total phenolics and characterization of the antioxidant activity of S.
Eti Rohaeti   +2 more
doaj   +1 more source

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