Most of the problems of endodontic origin have a bacterial etiological agent. Thus, there is a continued interest in seeking more effective chemical substances that can replace the camphorated paramonochiorophenol or antibiotics as intracanal medicaments. Among the possible substances, ozone has some interesting biological characteristics: bactericidal action, debriding effect, angiogenesis sti...

There is an ongoing debate regarding the potential of secondhand exposure of non-users to various chemicals from use of e-vapor products (EVPs). Room air levels of 34 chemicals (nicotine, propylene glycol (PG), glycerol, 15 carbonyl chemicals, 12 volatile organic chemicals (VOCs), and four selected trace elements) were measured where EVPs and cigarettes were used by n = 37 healthy adult tobacco...

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Deltamethrin (DLT; 0.7mg/kg/body wt/day, i.p., dissolved in propylene glycol) administration during postnatal days 913 in Albino rat pups, resulted in a delayed appearance of radial glial fibers, that guide the migration of granule cells. Moreover, the radial glial fibers in the DLT-treated pups were disorganized, hypertrophied and heavily stained. Thus, it is being proposed that although after...

Tinosorb® M is a widely used ultraviolet (UV) filter complex provided as an emulsion that contains the UV filter methylene bis-benzotriazolyl tetramethylbutylphenol (MBBT) (45–55%, CAS no. 103597-45-1), decyl glucoside (6–10%), propylene glycol (0.2–0.6%), and xanthan gum (0.1–0.5%). Fewer than 15 cases of contact allergy to Tinosorb® M have been published (1–7), and, to our knowledge, in only ...

An extended dynamic model is presented for a polyesterification reaction in a semi-batch wise operated vessel connected to a distillation column. The developed model describes the effect of polymerization on reactants. The model also contains kinetics describing the change of rate order during the reaction. To improve the predictive capabilities, the model has been extended with advanced thermo...

Oral administration of ceftriaxone associated with a bile acid-based new oral carrier, cholylethylenediamine, in 50% propylene glycol to rats at doses of 25 and 50 mg/kg of body weight resulted in a significant increase in intestinal absorption, as evidenced by 55% improvement in the bioavailability, whereas ceftriaxone alone showed a bioavailability of less than 1%.

since our studies on the acute effects of single dosages of parenteral reserpine are still in the exploratory stages, it should be clearly. understood that the results reported here are not to be taken as definitive but rather & tentative and preliiary observations. In the early stages of this investigation, we failed to observe significant hypotensive effects until we reached a dosage range of...

Novel polymer gel electrolytes have been prepared by incorporating LiI-I(2) solutions into a polyethylene oxide matrix supported by a TiO(2) filler. The gel electrolytes, based on either acetonitrile or propylene carbonate solvents are compared with liquid standard ones and are examined by (7)Li solid state nuclear magnetic resonance relaxometry and diffusion measurements. In parallel, the trii...

1. The polarization spectrum of insulin, ribonuclease and zein is qualitatively identical with that of tyrosine or cresol, but the lower absolute values of the principal polarization indicate the existence of energy transfer among the tyrosine residues. 2. The polarization spectrum of proteins containing tryptophan is similar to that of N-glycyltryptophan but differs from it in the lower values...