A new water recovery system architecture designed to fulfill the National Aeronautics and Space Administration’s (NASA) Space Exploration Policy has been tested at the Marshall Space Flight Center (MSFC). This water recovery system architecture evolved from the current state-of-the-art system developed for the International Space Station (ISS). Through novel integration of proven technologies f...

Over the past decade, considerable progress has been made in the development of organic materials for photovoltaic applications. Bulk heterojunction (BHJ) using n-type and a p-type semiconductor materials in the active layer is the most widely adopted device architecture to ensure maximum internal donor–acceptor (D–A) interfacial area for efficient charge separation. The most critical challenge...

Research over the past ten years has created a more detailed and coherent view of the relation between O 3 and its major anthropogenic precursors, volatile organic compounds (VOC) and oxides of nitrogen (NO x ). This article presents a review of insights derived from photochemical models and field measurements. The ozone—precursor relationship can be understood in terms of a fundamental split i...

[1] The kinetics of ozone (O3) chemistry and its two main precursors, nitrogen oxides (NOx) and volatile organic compounds (VOC), represents an important field of uncertainty in atmospheric chemistry and photochemical modeling. This uncertainty affects the design of control strategies to reduce tropospheric O3 production. The effect of controlling ozone precursors on sensitivity regimes was eva...

There are two main environmental problems in Moldova. Olle problem is a continues overexploitation and degradation of the environment linked to the low incomes of the population, and another problem is a forest dec1inelinked to the effects of air pollution. Thus, there is an urgent need for both the economic growth to improve the low incomes and for the reduction of air pollution to improve hea...

Characteristics of biogenic VOC (Volatile Organic Compounds) as well as methodology of BVOC (Biogenic VOC) emission estimation are presented in this article. It has been shown in previous studies (e.g. Simpson et al, 1995) that contribution of volatile organic compounds (VOC) emitted from biogenic sources to total amount of VOC in the atmosphere can be significant. Especially while modeling pho...

The authors conducted VOC measurements using PTR-TOF in Kathmandu, Nepal. PMF was used to separate various source contributions to ambient VOC as a function of time. The authors then used a PMF “nudging” tool and some a priori knowledge of source profiles to move the PMF solution into a more physically realistic space. The various PMF factors are identified by comparing their VOC composition wi...

Catalytic oxidation is a feasible and affordable technology for solvent emission abatement. However, finding optimal operation conditions is important, since they are strongly dependent on the application area of VOC incineration. This paper presents the results of the laboratory experiments concerning four most central parameters, that is, effects of concentration, gas hourly space velocity (G...

In an effort to reduce volatile organic compounds (VOCs) in paint solvents, replacements containing non-VOC compounds have been proposed. One such compound is 4-chlorobenzotrifluoride (CBTF), for which environmental fate studies have not been conducted. The objective of the present study was to determine the products of the atmospheric oxidation of CBTF and the aqueous fate of these products. S...