Browsing Citations Only by Issue Date
Now showing items 41-60 of 990
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Necessary conditions for a semigroup ring to be an integral CRM-ring with identity
(Springer New York, 1976-12)The immersion of semigroup rings into division rings gave rise to Tamari's [6] hierarchical classification of semigroups. Some basic properties of this classification were given elsewhere ([1] , [2] and [3]), pointing out ... -
Defective excision and postreplication repair of UV-damaged DNA in a recL mutant strain of E. coli K-12
(Springer: Molecular and General Genetics, 1977-01)The mutation recL152 leads to a reduction of excision repair as measured by an increase in the time required to close uvrA uvrB dependent incision breaks, and by a reduction of host cell reactivation ability. Postreplication ... -
Ontogenetic change in blood oxygen capacity and maximum activity in garter snakes (Thamnophis sirtalis)
(Springer: Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, 1977-01)There is an ontogenetic increase in the time that garter snakes (Thamnophis s. sirtalis) can maintain maximum activity at 25°C. Newborn snakes are exhausted by 3–5 min of activity while adults can be active for 20–25 min. ... -
The dependence of postreplication repair on uvrB in a recF mutant of Escherichia coli K-12
(Springer: Molecular and General Genetics, 1977-01)Summary Mutants carrying recF143 or recF144 show wild type levels of host cell reactivation of UV-irradiated lambda vir and wild type rates of excision gap closure in repairing UV damage to their own DNA. The same mutants ... -
Acid precipitation and reproductive success of ambystoma salamanders
(Springer: Water, Air and Soil Pollution, 1977-03): The two species of mole salamander that occur in the Ithaca, New York, region (Ambystoma maculatum and A. jeffersonianum) breed in temporary ponds that are formed by accumulation of melted snow and spring rains. Water ... -
Phosphorus-31 nuclear magnetic resonance studies of actinomycin D, ethidium bromide, and 9-aminoacridine complexes with dinucleotides
(The American Chemical Society: Biochemistry, 1977-06-28)Phosphorus-3 1 nuclear magnetic resonance spectra of actinomycin D, ethidium bromide, and 9-aminoacridine complexes with deoxydinucleotides and ribodinucleoside monophosphates are reported. In the 2:1 pdGpdCactinomycin D ... -
Ontogenetic change in molecular and functional properties of blood of garter snakes, Thamnophis sirtalis
(Wiley: Journal of Experimental Zoology, 1977-07)At birth the blood of garter snakes (Thamnophis sirtalis) has high oxygen affinity (P50 at 25°C and pH 7.2 = 21 mm Hg), low hematocrit (14%), and a high proportion of inactive hemoglobin (44%). Growth of the snakes is ... -
Primary products and secondary reactions in the photodecomposition of methyl halides
(The American Chemical Society: The Journal of Physical Chemistry, 1977-07-14)CH3I, CH3Br, and CH3CI have been photolyzed at 184.9 nm and CH3I at 253.7 nm, using CO, C2H4, C2H6, C3H8, C3D8, and CD4 as scavengers to assist in the identification of the primary decomposition products. The quantum yield ... -
Physiological basis of habitat partitioning in Jamaican Eleutherodactylus
(Springer: Oecologia, 1977-12)Rate of evaporation, resistance to drying, temperature selection, and critical thermal maximum were measured for Jamaican Eleutherodactylus acclimated to 20° C and a 12:12 L:D photoperiod. Two introduced species, E. ... -
A Test for "wrong-bond" rupture in the thermal structural isomerization of phenylcyclopropane and a confirmation of the two-center epimerization mechanism in its stereomutation
(The American Chemical Society (ACS), 1978) -
Melanin deposits associated with the venom glands of snakes
(Wiley: Journal of Morphology, 1978-01)Melanin deposits in the heads of both true vipers (Viperinae) and pit vipers (Crotalinae) are concentrated over the dorsal and dorsolateral aspects of the venom glands. This pigment may occur in any or all of six sites ... -
Effect of substituents on ring size in radical cyclizations. 1. Methyl vs. phenyl
(American Chemical Society: The Journal of Organic Chemistry, 1978-01-06) -
Heats of formation and bond dissociation energies of some simple sulfur- and halogen-containing molecules
(The American Chemical Society: Journal of Chemical and Engineering Data, 1978-04)The heats of formation and bond dissoclation energies of some simple sulfur- and halogen-containing molecules are derived from information found in the literature. These thermochemical quantities are useful in determining ... -
Poly(N-vinylcarbazole): A selective review of its polymerization, structure, properties, and electrical characteristics
(Wiley: Journal of Polymer Science: Macromolecular Reviews, 1978-05) -
5-Bromodeoxyuridine does not affect development of the sea urchin, Arbacia punctulata
(Elsevier: Experimental Cell Research, 1978-06)Development of Arbacia punctulata embryos in the presence of bromodeoxyuridine (BUdR) was investigated under conditions which allowed about 20% substitution of BUdR for thymidine residues in DNA. Development was essentially ... -
Isomerization of the predicted beta-D-fructose 6-phosphate
(Elsevier: Archives of Biochemistry and Biophysics, 1978-07)Phosphomannose isomerase (D-mannose 6-phosphate ketol-isomerase) (EC 5.3.1.8) has been shown to use the predicted beta-D-fructose 6-phosphate as substrate. The fate of alpha-D-fructose 6-phosphate is not determined by these ... -
Comparison of the electronic transitions of unconjugated thiones and imines: an exercise in the application of symmetry selection rules
(The American Chemical Society: Journal of Chemical Education, 1978-08)The purpose of this paper is to show how symmetry selection rules can be used to determine whether certain of the electronic transitions exhibited by the title compounds are allowed or forbidden by symmetry. -
Metabolism and activity of the spanish fringe-toed lizard (Lacertidae: acanthodactylus erythrurus)
(Elsevier: Journal of Thermal Biology, 1978-10)1.In the field, adult fringe-toed lizards (Acanthodactylus erythrusus) had a mean body temperature of 38.8 ± 0.2 (S.E.) °C while subadults maintained a significantly lowr temperature (x average = 35.4 +/- 0.5 degrees ... -
Photoabsorption spectra of gaseous methyl bromide, ethylene dibromide, nitrosyl bromide, thionyl chloride, and sulfuryl chloride
(The American Chemical Society: The Journal of Physical Chemistry, 1978-10-05)The photoabsorption spectra of some molecules of atmospheric interest, CH3Br, BrCH2CH2Br, BrNO, SOCl2, and SO2Cl2, were quantitatively investigated over the wavelength region from 190 to 300 nm at 295 K and were found to ... -
A comparative study of ethidium bromide complexes with dinucleotides and DNA: direct evidence for intercalation and nucleic acid sequence preferences
(The Americal Chemical Society: Biochemistry, 1978-11-14)The relative fluorescence quantum yields of ethidium bromide solutions with deoxyribodinucleoside monophosphates have been measured and found to correlate with similar data for the binding of ethidium to DNA. The fluorescence ...