the ir and nmr spectra were coupled with quantum chemical calculations in dft approach usingthe hybrid b3lyp exchange-correlation functional to confirm the structure of 2-methoxycarbonyl-7-methyl-1,3-thiazino[3,2-b][1,2,4]triazine-4,8-dione 2d.

Essential oils are highly appreciated by the cosmetics industry because they have antimicrobial and antioxidant properties, among others. Since essential oils are natural products, their inclusion in cosmetic formulations is a common practice. Currently, low-quality and/or adulterated essential oils can be found on the market; therefore, analytical methods for control are required. Raman spectr...

Aerial parts of the plant (250 g) were collected during flowering in April 2000 from Tehran province in Iran. The essential oil was obtained by steam distillation of air-dried aerial parts in an all-glass apparatus. The sample oil that was light yellow in color was dried over anhydrous sodium sulfate and stored under nitrogen in a sealed vial until required. The essential oil was examined by GC...

Background: Orange peel essential oils were obtained using supercritical fluid extraction. This method is an important high scaling extraction methods that used for extraction of plant and animal extracts. Methodology: The experimental parameters of SFE such as temperature, pressure, and extraction time and modifier volume were optimized using a central composite design after a 24-1fractional ...

Coherence, multiple scattering and the interplay between soft and hard processes are discussed. These physics phenomena are essential for understanding the nuclear dependences of rapidity density and pT spectra in high-energy heavy-ion collisions. The RHIC data have shown the onset of hard processes and indications of high pT spectra suppression due to parton energy loss. Within the pQCD parton...

It is suggested a general mechanism through which a -type behavior is produced in the speci c heat of a Bose gas near the critical temperature Tc. It is essential that the quasiparticle spectra have a gap proportional to the condensate. It works for a general class of quasiparticle spectra, and in particular, for the weakly interacting Bose gas. The introduction of a chemical potential in the t...

Aerial parts of the plant (250 g) were collected during flowering in April 2000 from Tehran province in Iran. The essential oil was obtained by steam distillation of air-dried aerial parts in an all-glass apparatus. The sample oil that was light yellow in color was dried over anhydrous sodium sulfate and stored under nitrogen in a sealed vial until required. The essential oil was examined by GC...

this study was carried out to evaluate the effect of different levels of essential oils of wormwood (artemisia absinthium) and cumin (cuminum cyminum (on antioxidant status, lipid peroxidation and serum metabolites in broiler chickens for 42 days. 336 day-old male broiler chicks (ross 308) were allocated to 7 treatments with 4 replications .dietary treatments were included a corn-soybean based ...

Mi~ed sensitivity optimization was considered! by Kwakernaak [9]. Francis et al. [5,4,6] gave various characterizations of the problem, e.g., in terms of the distance from [0 w] to [vM]H °°, where W, M, V, are in H = and M is inner. Jonckheere and Verma [7,12] described the problem in terms of the norm of the Hankel-Toeplitz operator displayed in (1) (below). Implicit methods of minimization, e...