Now showing items 41-50 of 65
Vibrational analysis of cyclo(-Ala--Ala) in two crystalline forms. Effect of structure on peptide group and CH modes
(Elsevier, 1988)
Cyclo(-Ala--Ala) has been found by X-ray diffraction to crystallize in two forms with different hydrogen bond patterns and strengths and different conformations of the C[alpha]H[alpha]C[beta]H3 group. We have done a ...
The microwave spectrum and structure of krypton--phosphorus trifluoride
(Elsevier, 1988-10-15)
The rotational spectrum of the weak complex between krypton and phosphorus trifluoride has been observed using a Fourier transform microwave spectrometer with a pulsed supersonic nozzle molecular beam source. The complex ...
Effect of mechanical agitation on hybridoma cell growth
(Kluwer Academic Publishers; Springer Science+Business Media, 1988-09)
Hybridoma cells (S3H5/γ2bA2) were grown in spinner flasks at different agitation speeds. It was found that cells in stationary and decline phases of growth were sensitive to shear force caused by agitation but cells in ...
The thermodynamic properties of [beta]-UO3 and [gamma]-UO3
(Elsevier, 1988-02-18)
Heat capacities of carefully characterized samples of [beta]-UO3 and [gamma]-UO3, have been measured from 5 to 350 K using an adiabatic calorimeter, and from 350 to 700 K by enthalpy increment drop calorimetry. Values for ...
Differential uptake and metabolism of free and esterified cholesterol from high-density lipoproteins in the ovary
(Elsevier, 1988-04-15)
Rat luteal cells utilize high-density lipoproteins (HDL) as a source of cholesterol for steroid synthesis. Both the free and esterified cholesterol of HDL are utilized by these cells. In this report, we have examined the ...
Thioalkylation of Meldrum 's Acid: Protected alkylidene derivatives of isopropylidene malonate
(WILEY-VCH Verlag GmbH, 1988-12-14)
Thioalkylated Meldrum 's acid is easily by treatment of Meldrum 's acid with an aldehyde and thiophenol in the presence of catalytical amounts of piperidinium acetate (→ 1–6 , Table 1 ). The adducts 1–6 are crystalline, ...
Rapid melting and quenching with microsecond current pulses
(Elsevier, 1988-01)
We report the use of microsecond current pulses to transform layered crystalline Ni---Zr films to amorphous alloys. The starting materials were electron-beam- or sputter-deposited multilayers with a composition modulation ...
Syngas and HDS catalysts derived from sulphido bimetallic clusters
(Elsevier, 1988)
The clusters, CP2'Mo2Fe2S2(CO)8 (MoFeS) and Cp2'Mo2CO2S3(CO)4 (MoCoS) (Cp' = [eta]-C5H4Me) have been supported on the refractory oxides, Al2O3, SiO2, TiO2, and MgO, and subjected to temperature programmed decomposition ...
Subsolidus phase relationships in part of the system Si, Al, Ca/N, O
(Elsevier, 1988)
Subsolidus phase relationships in the region bounded by Si3N4, SiO2, CaSiO3, 2CaO.Al2O3.SiO2, CaO.Al2O3, Al2O3 and [beta]'-Si2Al4O4N4([beta]60) have been studied. A new quinary phase with composition near to CaO. 1[middle ...