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610 Aktuelle Fachpublikationen zum Thema temperature

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Development and field testing of a miniaturized sampling system for simultaneous sampling of vapours and droplets

16.12.2014 | Dietmar Breuer; George C. Dragan; Claudia Friedrich; Carsten Möhlmann; Ralf Zimmermann, Journal of Environmental Monitoring, 2014

The sampling of semi volatiles (SV) in workplaces may lead to different results as measurements may be affected by sampling bias. The new European Standard EN 13936 defines “semi-volatiles” as substances with vapour pressures in the range between 0.001 and 100 Pa at room temperature. EN 13936 ...

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IJERPH, Vol. 11, Pages 12915-12926: Rat Lung Response to PM2.5 Exposure under Different Cold Stresses

12.12.2014 | Luo, Bin ; Shi, Hongxia ; Wang, Lina ; Shi, Yanrong ; Wang, Cheng ; Yang, Jingli ; Wan, Yaxiong ; Niu, Jingping, International Journal of Environmental Research and Public Health, 2014

Ambient particulate matters and temperature were reported to have additive effects over the respiratory disease hospital admissions and deaths. The purpose of this study is to discuss the interactive pulmonary toxicities of cold stress and fine particulate matter (PM2.5) exposure by estimating ...

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Sustainability, Vol. 6, Pages 9231-9243: Empirical Evaluation of the Effect of Heat Gain from Fiber Optic Daylighting System on Tropical Building Interiors

12.12.2014 | Munaaim, Muhammad Arkam C.; Al-Obaidi, Karam M.; Ismail, Mohd Rodzi; Rahman, Abdul Malek Abdul, Sustainability, 2014

A fiber optic daylighting system is an evolving technology for transporting illumination from sunlight into building interiors. This system is a solution developed by daylighting designers to reduce operational costs and enhance comfort. As an innovative technology, fiber optic daylighting ...

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Catalytic reforming of acetic acid as a model compound of bio‐oil for hydrogen production over Ni‐CeO2‐MgO/olivine catalysts

11.12.2014 | Xingmin Xu, Changsen Zhang, Yonggang Liu, Yunpu Zhai, Ruiqin Zhang, Xiaoyan Tang, Environmental Progress, 2014

Olivine was used as a support with CeO2/MgO as promoters to synthesize a series of Ni‐based catalysts by wet impregnation for reforming acetic acid as a model compound of bio‐oil for H2 production. These catalysts were characterized by X‐ray diffraction, N2 physisorption, and scanning electron ...

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KF‐impregnated clam shells for biodiesel production and its effect on a diesel engine performance and emission characteristics

11.12.2014 | Subramaniapillai Niju, Muhammed Niyas, Kader Mohamed Meera Sheriffa Begum, Narayanan Anantharaman, Environmental Progress, 2014

Natural white bivalve clam shells were calcined to obtain calcium oxide (CaO) and KF/CaO catalyst was synthesized by impregnating potassium fluoride (KF) on calcined clam shells. This solid catalyst was tested for transesterification of waste frying oil. A high biodiesel yield of 95.77% was ...

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Quantification of Chemical States, Dissociation Constants and Contents of Oxygen-containing Groups on the Surface of Biochars Produced at Different Temperatures

11.12.2014 | Zaiming Chen; Xin Xiao; Baoliang Chen; Lizhong Zhu, Environmental Science & Technology, 2014

Surface functional groups such as carboxyl play a vital role in the environmental applications of biochar as a soil amendment. However, the quantification of oxygen-containing groups on a biochar surface still lacks systematical investigation. In this paper, we report an integrated method ...

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Secondary Organic Aerosol from Aqueous Reactions of Green Leaf Volatiles with Organic Triplet Excited States and Singlet Molecular Oxygen

11.12.2014 | Nicole K. Richards-Henderson; Andrew T. Pham; Benjamin B. Kirk; Cort Anastasio, Environmental Science & Technology, 2014

Vegetation emits a class of oxygenated hydrocarbons - the green leaf volatiles (GLVs) - under stress or damage. Under foggy conditions GLVs might be a source of secondary organic aerosol (SOA) via aqueous reactions with hydroxyl radical (OH), singlet oxygen (1O2*), and excited triplet states ...

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Emission of Phthalates and Phthalate Alternatives from Vinyl Flooring and Crib Mattress Covers: The Influence of Temperature

05.12.2014 | Yirui Liang; Ying Xu, Environmental Science & Technology, 2014

Emissions of phthalates and phthalate alternatives from vinyl flooring and crib mattress covers were measured in a specially designed chamber. The gas-phase concentrations versus time were measured at four different temperatures, that is, 25, 36, 45, and 55 °C. The key parameter that controls the ...

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IJERPH, Vol. 11, Pages 12623-12631: Effect of a Brief Heat Exposure on Blood Pressure and Physical Performance of Older Women Living in the Community—A Pilot-Study

05.12.2014 | Stotz, Anja ; Rapp, Kilian ; Oksa, Juha ; Skelton, Dawn A.; Beyer, Nina ; Klenk, Jochen ; Becker, Clemens ; Lindeman ..., International Journal of Environmental Research and Public Health, 2014

Global climate change is affecting health and mortality, particularly in vulnerable populations. High ambient temperatures decrease blood pressure (BP) in young and middle aged adults and may lead to orthostatic hypotension, increasing the risk of falls in older adults. The aim of this study was ...

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Market-Driven Emissions from Recovery of Carbon Dioxide Gas

03.12.2014 | Sarang D. Supekar; Steven J. Skerlos, Environmental Science & Technology, 2014

This article uses a market-based allocation method in a consequential life cycle assessment (LCA) framework to estimate the environmental emissions created by recovering carbon dioxide (CO2). We find that 1 ton of CO2 recovered as a coproduct of chemicals manufacturing leads to additional ...

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