Introduction The aim of the present study was to evaluate and compare the compressive strength (CS) of mineral trioxide aggregate (MTA) and calcium-enriched mixture (CEM) cement when mixed with propylene glycol (PG). Methods and Materials Twenty four custom-made split molds with 5 holes in each were prepared. Molds were allocated into eight groups (n=15 holes) as follows: Groups 1,5: CEM and ...

Steady-state and time-resolved fluorescence anisotropy measurements of eosin in solution and eosin-5-maleimide bound to purified myosin were made to study localized motions of the "head region" of this protein. The lifetime and apparent Debye rotational relaxation times of eosin in aqueous solution are essentially invariant with changes in excitation wavelength. In more viscous solvents, such a...

Amplification of GC-rich DNA sequences is still a difficult task worldwide. Two frequently seen and inexpensive reagents-ethylene glycol and 1,2-propanediol-were found to be more effective than betaine in the amplification of 104 randomly selected GC-rich human DNA sequences with GC contents of 60-80% and lengths of 700-800 bp.

Egg whites can undergo gelation at extreme pH. In this paper, the effects of NaOH concentration (1.5, 2, 2.5, and 3%), temperature (10, 20, 30, and 40°C), and additives (metallic compounds, carbohydrates, stabilizers, and coagulants) on the strength of alkaline-induced egg white gel were investigated. Results showed that NaOH concentration and induced temperature significantly affected the rate...

An in vitro skin diffusion study of pure forskolin (1) versus a 1-containing Plectranthus barbatus root extract (P. barbatus extract) in hairless guinea pig skin and human skin in a flow-through diffusion cell system was conducted and is being reported for the first time. Both topical agents were formulated in a solution of 70% ethanol and 30% propylene glycol (v/v). The results showed that for...

Knowledge of the mechanism of formation, levels and toxicological profiles of the chemical products in the aerosols (i.e., vapor plus particulate phases) of e-cigarettes is needed in order to better inform basic research as well as the general public, regulators, and industry. To date, studies of e-cigarette emissions have mainly focused on chromatographic techniques for quantifying and compari...

BSA protected gold nanoclusters (Au25) are attracting a great deal of attention due to their unique spectroscopic properties and possible use in biophysical applications. Although there are reports on synthetic strategies, spectroscopy and applications, little is known about their polarization behavior. In this study, we synthesized the BSA protected Au25 nanoclusters and studied their steady s...

The odorous steroid compound 4,16-androstadien-3-one (androstadienone), found in axillary sweat, was previously reported to evoke hypothalamic activation in heterosexual women, but not in heterosexual men. However, subjects were exposed to the pure crystalline form of androstadienone, which raised the question whether the observed hypothalamic response is physiologically relevant. Therefore, in...

Emulsions are a class of disperse systems consisting of two immiscible liquids [1–3]. The liquid droplets (the disperse phase) are dispersed in a liquid medium (the continuous phase). Several classes may be distinguished: oil-in-water (O/W), water-in-oil (W/O), and oil-in-oil (O/O). The latter class may be exemplified by an emulsion consisting of a polar oil (e.g., propylene glycol) dispersed i...

During the period 1941-5, studies were conducted in this laboratory on the antidotal action of 2:3dimercaptopropanol (BAL, British Anti-Lewisite) and other thiols in arsenic poisoning; for review see Young (1946). The investigations were undertaken after receiving early reports of the work of Peters and his co-workers on the value of 2:3-dimercaptopropanol as an antidote to arsenic. In 1945 Pet...