The nitrogen mustards used in these experiments were the hydrochlorides of ethyl bis (/3 chloroethyl) amine, methyl bis (/3 chloroethyl) amine, and tris (fl chloroethyI) amine. Sodium nucleate was prepared from calf thymus by a modification of Hammarsten's procedure (5). After the preliminary extraction, filtration, and addition of CaC12, a precipitate was obtained by bringing the final ethanol...

The formation of stable protoplasts from os-1 (NM233t) (FGSC #4493 or 4494) mycelial cultures involves the germinaUse of partially purified Polyoxin B tion of macroconidia in Vogel's medium N containing 10% sorbose and 200-400 μg/ml purified Polyoxin B at 37° C (Selitrenfor forming protoplasts. nikoff et al., 1981 Exper. Mycol. 5: 155-161). Polyoxin B is purified from Polyoxin AL Wettable Powde...

Crystalline stanous chloride dihydrate (SCD), more descriptively named dichloroaquatin(II) monohy­ drate SnCl2(OH2) • H20 [1, 2], is not a very stable compound. The vapour pressure of its crystal water is appreciable already at room temperature. If the com­ pound is stored in a dry atmosphere or under vacuum it quickly loses water and becomes highly reactive at its surface. One of the usual met...

2014 The low temperature transient response of the polarization of a paramagnet to a fast high intensity (1 ms; 250 kG; 1/2 sine-wave) field pulse is shown to give information on spinlattice coupling, density and relaxation of phonon modes and, sometimes, magnetic ordering temperatures. LE JOURNAL DE PHYSIQUE TOME 35, DÉCEMBRE 1974, Classification Physics Abstracts 8.630 An analysis of the resp...

The emission spectra of naphthalene labeled hydrocarbons (NpHCn) and fluorocarbons (NpFCn) and anthracene labeled hydrocarbons (AnHCn) and fluorocarbons (AnFCn) in aqueous organic mixed solvents were investigated. The fluorescence spectrum of NpHC 16 in dimethyl sulfoxide-water (DMSO-H20) is dominated by excimer emission due to formation of aggregates. Addition of a fluorocarbon compound with c...

Molecular dynamics (MD) simulations have been demonstrated to elucidate the dissolution and nucleation phenomena at a molecular level for a variety of alkali halide salts in water at 25 "C. Within 12 to 20 ps anions in the LiCI, NaCl and CsF crystals have dissolved, but dissolution of cations has not been observed within the same time period. For KCI, NaF, and KF crystals which have cations and...

The production of sulfate in cloud droplets, and the attendant depletion of sulfur dioxide (SO2) oxidants were studied in wintertime orographic louds over southeastern Wyoming. By periodic (5-20 min) releases of SO 2 into the cloud the mixing ratio of SO 2 was raised to about double its background value of 0.7 parts per billion by volume (ppbv). Average values of the in-cloud reaction time, pse...

Phagocytosis of particles by polymorphonuclear leukocytes (PMN) 1 is accompanied by a burst of oxidative metabolic changes. These include increased oxygen consumption (1), hexose monophosphate shunt (HMS) activity (1), and hydrogen peroxide (H202) (2) and superoxide (02-) (3) production. Despite intensive investigation the mechanism by which this oxidative metabolism is stimulated during phagoc...

In order to preparing strontium ion selective electrode 6-(4- nitropheny1)-2-pheny14, 4- dipropy1-3, 5-diaza-bicyclo [3, 1, 0] hex-2-ene (NPDBH) was used as an ionophore. This electrode responds to Sr (II)ion with a sensitivity of 28.2 ± 0.5 mV/decade over the range 1.0 x 10-6 to 1.0 Mat pH 3.0-10.0. Thelimit of detection was 2.4 x 10-7 M. The influences of membrane composition, the pH of the t...

ion has been found not to occur in the D + H20 reaction.22 Recently, the back reaction OH+D2 -HOD +D has been studied,12 and the HOD product shows pronounced back scattering, which is consistent with the proposed transition-state geometry. In addition to these investigations, two groups have reported experimental studies of the effect of vibrational excitation on the abstraction reaction. Crim ...