High-resolution ellipsometry and neutron diffraction measurements have been used to investigate the structure, growth, and wetting behavior of fluid pentane (n-C(5)H(12)) films adsorbed on graphite substrates. We present isotherms of the thickness of pentane films adsorbed on the basal-plane surfaces of a pyrolytic graphite substrate as a function of the vapor pressure. These isotherms are meas...

Multi-resistance to antibiotic therapy and to biocides is becoming increasingly common, which has led to mounting concern worldwide regarding the future use of traditional antimicrobials. Diols or glycols also have antimicrobial effects. Pentane-1,5-diol has low oral toxicity, is essentially non-irritating to the skin and has high antimicrobial activities against bacteria, fungi and viruses. Th...

We describe a method for the collection of expired air and further document the performance of our analytical technique that is used to measure ethane and pentane simultaneously. Four minutes of breathing hydrocarbon-free air before collection effectively removed high concentrations of residual ambient ethane and pentane from the lungs, with washout times up to 30 min resulting in no further re...

The pentane extract of the Peruvian plant Lepidium meyenii (Maca) has been shown to possess neuroprotective activity in vitro and in vivo. The involvement of the endocannabinoid system has been shown to be a possible mechanism of action. Some of the lipophilic constituents of Maca such as the macamides have been reported to possess significant pharmacological properties as shown in cell culture...

Treatment of 3-formylacetylacetone with the amines benzylamine, tert -butylamine and ( S )-methylbenzylamine led to formation corresponding Schiff bases 3-[(benzylamino)methylidene]pentane-2,4-dione, C 13 H 15 NO 2 1 ), 3-[( -butylamino)methylidene]pentan-2,4-dione, 10 17 ) 3-{[( )-benzyl(methyl)amino]methylidene}pentane-2,4-dione, 14 3 ). The molecules all three compounds exist as enamine taut...

The aim of this study was to compare pentane-1,5-diol and propane-1,2-diol used as absorption enhancers for cutaneously administered terbinafine. Fresh human skin samples were placed in a continuous flow diffusion cell with a gel containing terbinafine on top of the skin. Receptor fluid samples were analysed using high - performance liquid chromatography. The quantity of gel remaining on the sk...

For decades, the nitrogene hyperfine coupling constant aN of nitroxides has been applied to probe their environment using EPR. However, the small changes observed (≈2 G from n-pentane to water) with the solvent polarity allow only a qualitative discussion. A stable β-phosphorylated nitroxide exhibiting a small change in aN (≈3 G from n-pentane to water) and a striking change (≈25 G from n-penta...

BACKGROUND Exhaled pentane, which is produced as a consequence of reactive oxygen species-mediated lipid peroxidation, is a marker of oxidative stress. Propofol is widely used as a hypnotic agent in intensive care units and the operating room. Moreover, this agent has been reported to inhibit lipid peroxidation by directly scavenging reactive oxygen species. In this study, using a porcine liver...

In the title compound, C(7)H(12)N(2)O(2)S(2), the conformation of the dithia-cyclo-pentane ring is a half-chair, with a total puckering amplitude Q(T) = 0.473 (5) Å. Inter-molecular C-H⋯N and C-H⋯O inter-actions help to establish the packing.

Raw fractions used in isomerization plants contain isopentane, which is the target product, and its presence feed as “ballast” occupies useful volume of reactor. To optimize composition processed raw materials, a number enterprises have included deisopentanizer column technological scheme. The paper evaluates possibility optimizing regimes design parameters for low-temperature unit that does no...