Results 81 to 90 of about 42,859 (241)

Performance Investigation of Eco‐Friendly Refrigerant Mixtures as an Alternative to R134a in Vapour‐Compression Refrigeration System

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT The growing impacts of climate change and energy scarcity demand environmentally sustainable refrigeration solutions. This study investigates eco‐friendly refrigerants (R152a, R290 and R600a) and their optimized ternary mixture as alternatives to R134a. Four blend compositions were analysed using experimental testing and REFPROP 10.0 modelling
M. Periyasamy, P. Senthilkumar
wiley   +1 more source

Eighteenth Year of the Gulf of Maine Environmental Monitoring Program [PDF]

open access: yes, 2009
This report summarizes the metals and organic contaminant data associated with the collection and analyses of blue mussel (Mytilus edulis) tissue from selected sites along the Gulf of Maine coast during the 2008 sampling season. Contaminant monitoring is
Aube, Jamie   +14 more
core   +1 more source

Mandible composition and properties in two selected praying mantises (Insecta, Mantodea)

open access: yesThe Anatomical Record, EarlyView.
Abstract Insects process their food with their cuticle‐based mouthparts. These feeding structures reflect their diversity and can, in some cases, showcase adaptations in material composition, mechanical properties, and shape to suit their specific dietary preferences.
Malo Roze   +3 more
wiley   +1 more source

Humidity Effect on Adsorption Kinetics of Aromatic and Chlorinated Hydrocarbon Vapors onto Fe2O3 Thin Film

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi
In this study, the influence of relative humidity on amorphous Fe2O3 thin film’ sensing properties towards aromatic and chlorinated hydrocarbon vapor and their adsorption kinetics were examined systematically. The sensing results showed that the relative
Nursel Can
doaj   +1 more source

Volatile Short-chain Chlorinated Hydrocarbons in the Groundwater of the City of Zagreb [PDF]

open access: yesKemija u Industriji, 2008
The aim of the study was to assess the quality of the groundwater sampled from private wells and the public water-supply system in terms of estimating the contamination caused by short-chain chlorinated hydrocarbons, as well as to estimate the exposure ...
Marijanović-Rajčić, M., Senta, A.
doaj  

Investigation of Metal and Organic Contaminant Distributions and Sedimentation Rates in Backwater Lakes along the Illinois River [PDF]

open access: yes, 2008
Systematic sub-sampling of sediment cores in sections of uniform thickness is necessary in order to evaluate historic changes in sediment quality, to determine the vertical extent of contamination, and to measure sedimentation rates.
Cahill, Richard A.   +2 more
core  

A Review on Applications and Challenges of Fullerenes in Proton Exchange Membranes

open access: yesCarbon Energy, EarlyView.
This review is devoted to the analysis of the use of fullerenes and their functionalized derivatives to improve the efficiency of proton exchange membranes. The synthetic methods, structure, properties, and proton transfer mechanisms of fullerene‐containing membranes are discussed in detail. Promising areas of scientific research are discussed, and key
Ruslan Usmanov, Alexander Pozdnyakov
wiley   +1 more source

Determination of chlorinated hydrocarbons in milk samples using sol-gel based polymer coated silica sorbent for stir-bar supported micro-solid-phase extraction coupled with gas chromatography mass-spectrometry

open access: yesJournal of Saudi Chemical Society, 2019
In this work, sol-gel reaction chemistry was utilized to create 3-(trimethoxysilyl)propyl methacrylate-poly (propylene glycol) polymer coating on amorphous silica.
Khalid Alhooshani
doaj   +1 more source

Hole‐Selective Self‐Assembled Monolayers Overlaid on NiOx or PEDOT:PSS for Tin‐Based Perovskite Solar Cells – An Overview of Recent Characterization Methods

open access: yesChemistry – A European Journal, EarlyView.
Successfully applying self‐assembled monolayers with hole‐selectivity for lead‐free tin perovskite solar cells requires judicious investigation with appropriately powerful characterization methods, in addition to efforts in the development of new materials and processing.
Donghoon Song   +3 more
wiley   +1 more source

Molecular biomarkers and toxic consequences of impact by organic pollution in aquatic organisms [PDF]

open access: yes, 1994
Organic contaminants are readily bioaccumulated by aquatic organisms. Exposure to and toxic effects of contaminants can be measured in terms of the biochemical responses of the organisms (i.e. molecular biomarkers).
Förlin, L.   +2 more
core  

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