Notes

It is not clear whether moderate alcohol intake can produce a similar effect in the liver nor whether alcohol can potentiate aromatization of androgens in other tissue or organs of male rats
In females, the available information is not adequate to evaluate the effect of alcohol on aromatization. Further studies are required in both genders to evaluate the ability of alcohol (moderate vs. heavy dose) to promote aromatization of androgens to estrogens.Nano-Gaps Fabricated by Thermal Evaporation and Stripping Techniques.The fabrication of inexpensive nano-gaps is vitally important for the research and application of nanochannel-based devices. This study presents a low-cost and simple method for the fabrication of nano-gaps using thermal evaporation and stripping techniques.

The structural morphology of metal films deposited on the convex structures of photoresist by sputtering and thermal evaporation was studied. The effect of angles of thermal evaporation on the width of nano-gaps was investigated. The characteristics of metal film deposited on the convex structures of photoresist and spaces between these convex structures after stripping were investigated, and the adhesive force between the metal film and silicon substrate was also analyzed. Finally, a metal film of Cu was deposited on the convex structures of photoresist by thermal evaporation. After stripping, nano-gaps with a width of 187 nm were fabricated. The method proposed in this paper can be employed to mass-produce two-dimensional nanochannels based devices Two ring-A-aromatized bile acids from the marine sponge Sollasella moretonensis.Two ring-A-aromatized bile acids, 1 and 2, were isolated from the sponge Sollasella moretonensis, collected from the seabed of northern Queensland.

Structures were assigned on the basis of extensive 1D and 2D NMR studies, as well as analysis by HRESIMS. Compound 2 has previously been produced synthetically, though this marks its first isolation from a natural source.Concurrent stabilization of π-donor and π-acceptor ligands in aromatized and dearomatized pincer [(PNN)Re(CO)(O)₂] complexes.(2,6-Me2)PhNC (c)), possessing both π-donor and π-acceptor ligands, have been Complexes 1 and 2 are prepared from the reaction of 4 and 3, respectively, with CO or isocyanides. Single-crystal X-ray structures of 1 a and 1 b show the expected trans-dioxo structure, in which the oxo ligands occupy the axial positions and the π-acidic ligand occupies the equatorial plane in an overall octahedral geometry about the rhenium(V) center. DFT studies revealed the stability of complexes 1 and 2 arises from a π-backbonding interaction between the d(xy) orbital of rhenium, the π orbital of the oxo ligands, and the © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Fracture Resistance of Ceramic Crowns Supported with Indirect Chair-side University, 6 October City, Giza, Egypt.AIMS AND OBJECTIVES: To evaluate the influence of indirect chair-side polymerization of resin composite cores on the fracture resistance of overlaying MATERIALS AND METHODS: Root canals of 60 extracted premolars were prepared to receive #2 fiber posts after the crowns were sectioned 2 mm above the cervical line. In Groups 1-3 (n = 10 each), posts were luted to the prepared dowel spaces using self-adhesive resin cement. Resin composite cores were then bonded and incrementally built-up using Filtek Z250 XT, Filtek P60, and Filtek P90 resin composites. In Groups 4-6 (n = 10 each), the fabricated post-core systems were subjected to post-curing heat and pressure treatment before cementation to their respective teeth using self-adhesive resin cement. Another 10 sound premolars served as control. All teeth in the test and control groups were then subjected to standardized preparation to receive IPS e.

6-butyl-n-hydroxynaphthimide trifluoromethanesulfonic acid as a Catalyst in Organic Transformations before testing their fracture resistance and the mode of restorations' failure. The collected results were statistically analyzed using ANOVA, Kruskal-Wallis, and Tukey's tests on the past software used at α = 05 to stand on the significance of the RESULTS: Significant differences were detected between the fracture resistance of teeth in different groups (ANOVA, P = 257E-35). Crowns in Groups 4-6 provided higher fracture resistance than those in Groups 1-3 (Tukey's test, P < 05). Crowns in Groups 4 and 6 provided higher fracture resistance than the control, while those in Groups 2 and 3 provided lower fracture resistance than CONCLUSION: Indirect composite cores improved the fracture resistance of IPS e.max Press crowns when compared to directly fabricated post and cores. The directly and indirectly polymerized nanohybrid, methacrylate-based composite (Filtek Z250 XT) cores yielded the highest fracture resistance for the utilized Evolving trend and self-similarity of ozone pollution in central Hong Kong The evolving pattern of ozone level in Hong Kong urban air has undergone various changes and corresponds to the regional urban and economic development. We assess such changes by reviewing and analyzing the original ozone pollutant database monitored in central Hong Kong downtown area during the period of 1984-2002.

Both fractal analysis and traditional statistical methods are adopted to estimate the ozone evolving characteristics during the studied period. It is found that the ozone evolving pattern has strong self-similarity and the ozone pollution presents increasing trend in Hong Kong region in recent years based on the analysis.
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