restrictions on the use of synthetic antioxidant such as butylated  hydroxyanisole  (bha) and butylated  hydroxytoluene (bht) are being imposed  because of  their carcinogecity. in this investigation  optimization  of phenolic extraction  process  frome  methanolic (80%)  extract (v/v) of  elaegnus  angustifolia  through  response  surface methodology  by fulin cio- calteu is  performrd  for op...

The temperature dependence of the optical dephasing mechanism in an organic polymer glass, polymethylmethacrylate ͑PMMA͒, was studied from 300 K to 30 K using the dye IR144 as a probe. Transient grating and three pulse photon echo measurements were made, and the three pulse photon echo peak shift ͑3PEPS͒ was recorded as a function of temperature. The peak shift data reveal time constants of ϳ6 fs a...

restrictions on the use of synthetic antioxidant such as butylated  hydroxyanisole  (bha) and butylated  hydroxytoluene (bht) are being imposed  because of  their carcinogecity. in this investigation  optimization  of phenolic extraction  process  frome  methanolic (80%)  extract (v/v) of  elaegnus  angustifolia  through  response  surface methodology  by fulin cio- calteu is  performrd  for op...

olive oil extraction methods and technology can affect the quality and quantity of the extracted oil. in this study, qualitative and quantitative parameters were investigated for oil extracted using a hammer crusher at 720 and 1450 rpm at 30°, 40°, 60° c mixing temperatures. the data were analyzed using a complete randomized block factorial design using spss software with three replications. th...

Phase angle shift between the current and voltage with frequency has been reported for a single phosphoric acid fuel cell in the cell temperature from 100 °C to 160 °C and the humidifier temperature from 40 °C to 90 °C. An electrochemical workbench is employed to find the shift. The figure of phase angle shift shows a peak in high humidifier temperatures. The peak in phase angle shift directs t...

Background and Objectives: Today, 24-hours work is an unavoidable component in several industries. Night-work is an imperative situation for an important part of workforces. Shift-working is called to work at hours out of usual day-work time (7:00 am to 6:00 pm). The present study was a cross sectional descriptive-analytic research, and was carried out in order to investigate sleepiness and cha...

The most important impacts of climate change relate to temperature and precipitation. Precipitation is particularly important, because changes in precipitation patterns may lead to floods or droughts in different areas. Also, precipitation is a major factor in agriculture and in recent years interest has increased in learning about precipitation variability for periods of months to annual and s...

Fig. 2: Illustration of the shift distance of the water peaks between 23.5 and 39.5 °C (0.095 ppm) adjusted by Cr/PCr at 3.02 ppm as temperature independent reference. Due to the excessive intensity of water the other resonances were presented with a magnification factor of 1500. Fig. 3: Correlation between temperature and chemical shift distance of the H2O signal compared to tCho (a) and Cr/PC...