In order to understand how unburned hydrocarbons emerge from SI engines and, in particular, how nonfuel hydrocarbons are formed and oxidized, a new gas sampling technique has been developed. A sampling unit, based on a combination of techniques used in the Fast Flame Ionization Detector (FFID) and wall-mounted sampling valves, was designed and built to capture a sample of exhaust gas during a s...

The majority of natural gases are mixtures of saturated hydrocarbons where methane prevails; they come from underground accumulations of gases alone or gases associated with oil. There are thus as many compositions of natural gases as exploited hydrocarbon layers. Apart from the methane which is the prevailing element, the crude natural gas usually contains decreasing volumetric percentages of ...

AIM To investigate RBC-NOS dependent NO signaling during in vivo RBC aging in health and disease. METHOD RBC from fifteen healthy volunteers (HC) and four patients with type 2 diabetes mellitus (DM) were separated in seven subpopulations by Percoll density gradient centrifugation. RESULTS The proportion of old RBC was significantly higher in DM compared to HC. In both groups, in vivo aging ...

Cuticular hydrocarbons of arthropods serve multiple functions, including as barriers to water loss and as pheromones and pheromone precursors. In the oviparous German cockroach, Blattella germanica, long-chain hydrocarbons are produced by oenocytes within the abdominal integument and are transported by a blood lipoprotein, lipophorin, both to the cuticular surface and into vitellogenic oocytes....

Cerium oxide (CeO2) is widely used in three-way-catalysts (TWCs) the catalytic oxidation of hydrocarbons (HC) and carbon monoxide (CO) as well reduction NOx. It has also had use a fuel-borne catalyst diesel fuel – particularly to promote particulate filter (DPF) regeneration. The literature indicates that effect CeO2 might reduce HC emissions, NOx formation, slow burn rates consumption. In this...

Mesenchymal stem cells from human bone marrow (hMSC) have the potential to differentiate into hepatocyte-like cells in vitro and continue to maintain important hepatocyte functions in vivo after transplantation into host mouse livers. Here, hMSC were differentiated into hepatocyte-like cells in vitro (hMSC-HC) and transplanted into livers of immunodeficient Pfp/Rag2⁻/⁻ mice treated with a suble...

The focus of this work is to increase the understanding of the lean NOx reduction over silver-alumina catalysts using hydrocarbons as the reductant (HC-SCR). In particular, the effect of silver loading, the role of platinum doping, the effect of the reducing agent as well as the effects of aging and hydrothermal treatment on the catalytic activity, in particular at low temperatures, and selecti...

Insect cuticular hydrocarbons (CHCs) serve as important intersexual signaling chemicals and generally show variation between the sexes, but little is known about generation of sexually dimorphic (SDHCs) in insects. In this study, we report molecular mechanism biological significance that underlie SDHC German cockroach Blattella germanica . Sexually mature females possess more C29 CHCs, especial...