in this study, the trace amounts of erythrosine, as a food dye is determined by cloud point extraction-scanometry (cpe-scanometry) as a new, facile, available, fast, sensitive, and low cost method. the method is based on the cpe of analyte from aqueous solution, diluting the extracted surfactant-rich phase with ethanol, transfer to plexiglas®cell and scanning the cells containing the analyte so...

The temperature dependence of electrical resistivity was measured for three materials: a conductor (copper), a semiconductor (a carbon resistor), and a doped semiconductor (a pn junction). As expected, the resistance of the copper sample decreased with temperature and the resistance of the carbon resistor increased with temperature. The temperature coefficient of resistance of Cu was calculated...

Photoreactions of the fourth rhodopsin-like pigment, phoborhodopsin (pR480), of Hulobacrerium halobium were studied by low-temperature spectrophotometry. Upon irradiation of pR480 at -80 as well as 170°C with 436 nm light, a new intermediate having a difference absorption maximum at about 520 nm was produced. We designate this intermediate ‘P520’. Prolonged irradiation caused the formation of a...

The ground states and low temperature states of the Falicov-Kimball model are studied in the plane of chemical potentials of the two sort of particles involved, for large values of the coupling constant, near the half lled band. For this study, a cluster expansion is introduced which can be used to investigate the eeective interaction energy between the static particles.

TWRS wastes contain certain chemical components which, either because of their limited solubility or volatilization at high temperatures, present problems for conventional vitrification technologies. The current task completed by BNL concerns the use of low temperature glasses for tank waste remediation. A literature review of existing technologies highlighted lead-iron-phosphate glasses, with ...

TAYLOR, c. R. Metabolism, respiratory changes, and water balance of ~12 antelope, the eland. Am. J, Physiol. 217(l) : 3 17-320. 1969. The eland is a large East African antelope which can survive prolonged droughts in hot semideserts without drinking. This ability is partly due to a low respiratory water loss relative to the oxygen consumption at night. Each night the eland has a low body temper...

SPICE parameters needed for simulation o f CMOS readout circuits used in infrared image sensors cooled at low temperature are extracted using a specific MOSFET model based on the EKV 2.6 compact charge model. It is used below 200 K and is very well adapted to analog simulation in weak and moderate inversion regimes. It was successively applied on different CMOS processes from different foundrie...

The extraction of carotenoids from Japanese persimmon peels by supercritical fluid extraction (SFE), of which the solvent was CO(2), was performed. In order to enhance the yield and selectivity of the extraction, some portion of ethanol (5 - 20 mol%) was added as an entrainer. The extraction temperature ranged from 313 to 353 K and the pressure was 30 MPa. The effect of temperature on the extra...

13 14 In this work, extraction and characterization of compounds with antioxidant and antimicrobial 15 activity from Haematococcus pluvialis microalga in red phase have been carried out. To do 16 this, subcritical water extraction (SWE) has been combined with analytical techniques such as 17 HPLC-DAD, HPLC-QqQMS and GC-MS and in-vitro assays (i.e., for antioxidant and 18 antimicrobial activity)...

The ultrasound-assisted extraction (UAE) method was used to optimize the extraction of phenolic compounds from pumpkins and peaches. The response surface methodology (RSM) was used to study the effects of three independent variables each with three treatments. They included extraction temperatures (30, 40 and 50°C), ultrasonic power levels (30, 50 and 70%) and extraction times (10, 20 and 30 mi...