-In-order-to-confirm-whether-aminoglutethimide-the-aromatase-inhibitor-used-in-our-previous-study-either-blocked-aromatization-or-the-action-of-estradiol-the-following-study-was-conducted-s

Fifteen male mongrel dogs were equally divided into three groups. Group 1 dogs were implanted with estradiol-filled polydimethylsiloxane capsules only; Group 2 dogs were implanted with empty capsules and treated with 60 mg b.i.d. of aminoglutethimide; and Group 3 dogs were implanted with polydimethylsiloxane capsules filled with estradiol and treated with aminoglutethimide. Blood samples were drawn for 24 days during pretreatment, capsule implantation, castration, aminoglutethimide administration and capsule removal periods.

The postcastration response of both plasma LH and FSH in dogs in groups 1 and 3 was suppressed in the presence of elevated estradiol, whereas that of Group 2 dogs was normal in the absence of estradiol. The results suggest that aminoglutethimide neither directly affects the plasma concentration of either LH or FSH nor blocks the effect of estradiol in inhibiting their release following castration. These data, taken together with our previous work, implicate aromatization of testosterone to estradiol in the control of Effect of a wildfire and of post-fire restoration actions in the organic matter Instituto de Investigação e Formação Avançada, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal; HERCULES Laboratory, Universidade de Évora, Palácio do Vimioso, 7000-089 Évora, Portugal.Group, Av. Reina Mercedes, 10, 41012 Seville, Spain.C/Profesor García González, 1, 41012 Seville, Spain.

Group, Av. Reina Mercedes, 10, 41012 Seville, Spain. Electronic address: The impact of wildfires and of restoration actions on soil organic matter (SOM) content and structure was studied in a soil under pine (Pinus pinea) from Doñana National Park (SW Spain). Learn more were collected from burnt areas before (B) and after post-fire restoration (BR) and compared with an unburnt (UB) site. Analytical pyrolysis (Py-GC/MS) was used to investigate SOM molecular composition in whole soil samples and in coarse (CF) and fine (FF) fractions. The results were interpreted using a van Krevelen graphical-statistical method. Highest total organic carbon (TOC) was found in UB soil and no differences were found between B and BR soils.

The CF had the highest TOC values and FF presented differences among the three scenarios. Respect to SOM structure, the B soil was depleted in lignin and enriched in unspecific aromatics and polycyclic aromatic hydrocarbons, and in all scenarios, CF SOM consisted mainly of lignocellulose derived compounds and fatty acids. In general, FF SOM was found more altered than CF. High contribution of unspecific aromatic compounds and polycyclic aromatic hydrocarbons was observed in B-FF whereas BR-FF samples comprised considerable proportions of compounds from labile biomass, possibly due to soil mixing during rehabilitation actions. The fire caused a defunctionalisation of lignin-derived phenolics and the formation of pyrogenic compounds. The van Krevelen diagram was found useful to-at first sight-differentiate between chemical processes caused by fire and of the rehabilitation actions. Fire exerted SOM demethoxylation, dealkylation and dehydration.

Seebio Photosensitizer for Acid Formation indicate that soil management actions after the fire lead to an increase in aromaticity corresponding to the accumulation of lignin and polycyclic aromatic compounds. This suggests additional inputs from charred lignocellulosic biomass, including black carbon, that was incorporated into the soil during rehabilitation 10562/0031-8655(2001)074<0378:cbvrap>2.co;2.Competition between vibrational relaxation and photochemistry: relevance of Two molecules showing photochemistry but no fluorescence have been investigated at 80 K in a rigid matrix regarding the behavior of the quantum yield for bond fragmentation as a function of the vibrational/vibronic level and electronic excited state. A new equation was developed to determine the photochemical quantum yield under ambient conditions (80 K). The levels/bands involved were those within a given vibrational progression, in different progressions as well as in combination. The yield was low (phi = 0) with excitation into the n = 0 level of S1 but very rapidly increased with excitation into higher levels whether they were harmonics or combination levels.

A parallel result was observed upon excitation into S2. Vibrational relaxation/deactivation occurs only between levels of the same vibrational progression. Deactivation from the 0 level of S2 does not occur via levels of S1. The photochemically active modes correspond to the vibrational modes present in the region of the molecule where bond breakage occurs. These results add further proof of the complex nature and number of processes that can occur within excited states of photochemically Assessing the Oxidative Degradation of N-Methylpyrrolidone (NMP) in Microelectronic Fabrication Processes by Using a Multiplatform Analytical David Keir Building, Stranmillis Road, Belfast, Antrim BT7 1NN, UK.Research Institute, Mass Spectrometry Centre, Cromore Road, Coleraine BT52 1SA, During the construction of recording head devices, corrosion of metal features and subsequent deposition of corrosion by-products have been observed.