Strong correlation between the aroma and pleasantness scores of smoke and the content of valeric acids in the leaves of Oriental tobaccos was observed, while it was not the case for leaves of Virginia and burley tobaccos. It was found that leaves of Oriental and burley tobaccos contain higher amounts of both valeric acid derivatives than Virginia tobaccos containing isovaleric acid but no 3-methylvaleric acid. The aroma characteristics of the smoke were scored by sensory evaluation. Applying a structural identifiability study, it is concluded that it is necessary to perform simultaneous batch experi.Įvaluation of Aroma in Oriental Tobaccos as Based On Valeric Acid Gas Chromatographyįull Text Available Levels of valeric acids (isovaleric and 3-methylvaleric in leaves and smoke of different tobacco types were quantified by capillary gas chromatography (GC using flame ionization detector (FID. Mathematical model of the decomposition of valerate presents 3 unknown kinetic parameters, 2 unknown stoichiometric coefficients and 3 unknown initial concentrations for biomass. Parameter identification of thermophilic anaerobic degradation of valerateįlotats, X Ahring, Birgitte Kiær Angelidaki, Irini Melting takes place in two different steps, at 200 degrees C and 280. The thermal decomposition of barium valerate (Ba(C4H9CO2)(2)/Ba-pentanoate) was studied in argon by means of thermogravimetry, differential thermal analysis, IR-spectroscopy, X-ray diffraction and hot-stage optical microscopy. Thermal decomposition of barium valerate in argon The use of latanoprost added to the therapeutic efficacy of topical betamethasone valerate in the treatment of AA and could be an effective adjunctive topical therapy for AA. Latanoprost, minoxidil and betamethasone valerate are effective and safe in the treatment of patchy AA. There was a statistically significant improvement in all therapeutic groups when compared with control group and reduction of severity of alopecia tool score of scalp and beard before and after treatment for all therapeutic groups. Hundred patients with AA classified into five groups of 20 treated with: Group I, latanoprost 0.1% lotion Group II, minoxidil 5% lotion Group III, betamethasone valerate 0.1% solution Group IV, combination of latanoprost lotion and betamethasone valerate solution and Group V, a vehicle lotion control group. To compare the efficacy and safety of topical latanoprost, minoxidil and betamethasone valerate on hair growth in patients with AA. There is no universally proven therapy that induces and sustains remission of hair growth in AA. 430 U/g biocatalyst after four reuses.Įfficacy of topical latanoprost versus minoxidil and betamethasone valerate on the treatment of alopecia areata.Įl-Ashmawy, Amal Ahmad El-Maadawy, Iman Hamed El-Maghraby, Gamal MohamedĪlopecia areata (AA) is one of the most common causes of localized hair loss. The reuse of enzymes in these conditions was tested and the results show a relatively good reusability of these biosilicified enzymes under the investigated conditions, particularly preserving fairly stable specific activities (616 vs.
#MODO DE SILOGISMO FREE#
90% in 2 h with 15% m/v of biosilicified lipase (Bio-lipase 616 U/g biocatalyst enzymatic activity and a molar ratio 1:2 ( valeric acid:ethanol, slightly superior to that observed by the free enzyme (75% conversion, 583U/g biocatalyst enzymatic activity. Yields in the ultrasound-promoted esterification of valeric acid was ca. This one-pot room temperature methodology of enzyme biosilicification leads to biosilicified lipases with improved activity and reaction efficiency as compared to free enzymes. Ultrasound-Assisted Esterification of Valeric Acid to Alkyl Valerates Promoted by Biosilicified Lipasesĭirectory of Open Access Journals (Sweden)įull Text Available A novel, environmentally friendly, and sustainable ultrasound-assisted methodology in the valorization of valeric acid to alkyl valerate using a biosilicified lipase from Candida antarctica is reported.