18 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Globin"  
Results: 1 - 18
captions transcript

[News Clip: Survivor]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: October 2, 1990, 10:00 p.m.
Duration: 45 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Structure of bound water and refinement of acid metmyoglobin

Description: The structure of myoglobin has been determined by x-ray diffraction for the acidmet, deoxy, and the oxy forms. Neutron diffraction work, done in this laboratory, has demonstrated that hydrogen and deuterium positions can be located. In addition to the localization of H and D, neutron diffraction provides a unique method for studying the water structure because of the strong scattering ability of D/sub 2/O. The scattering factor of deuterium is nearly twice as large as that of hydrogen, and it i… more
Date: June 1, 1982
Creator: Raghaven, N. V. & Schoenborn, B. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Investigation of the Triplet State of Chlorophylls. Technical Progress Report, May 1, 1979-April 30, 1980

Description: The triplet state of chlorophyll has been utilized as a nondestructive probe into the structural and dynamical nature of the photosynthetic apparatus, both in vitro and in isolated in vivo subunits. During the past year, using zero-field triplet state optically detected magnetic resonance spectroscopy, the research program has examined triplet energy transfer between photosynthetic pigments in solution; has isolated and studied subchloroplast particles enriched with photo-system I and the light… more
Date: January 1, 1980
Creator: Clarke, R. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Soldier]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: October 2, 1990, 5:00 p.m.
Duration: 1 minute 49 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Quaternay structure and spin state of human fetal methemoglobin. Progress report, September 1, 1979-July 1, 1980

Description: The transition between the high spin form of methemoglobin A was also studied by low-temperature EPR spectroscopy both in the absence and in the presence of IHP. The results showed a pK = 8.2 for this transition for the stripped protein, while in the presence of IHP the pK is shifted to about 8.5.
Date: January 1, 1980
Creator: Chevion, M.; Ilan, Y. A.; Navok, T. & Czapski, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pulse radiolysis studies of fast reactions in molecular systems. Progress report, November 1976--October 1977

Description: Results from research in the following two areas are given: formation, properties, and reactivity of molecular ionic species in irradiated liquid systems; and pulse radiolysis of elementary reactions in protein function. (LK)
Date: November 1976
Creator: Dorfman, L. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dichloromethane as a modulator of hemoglobin function. [Low angle neutron scattering studies on dichloromethane-hemoglobin complex]

Description: X-ray crystallographic analysis suggested that site D3 is only fully occupied at dichloromethane (DCM) pressure of 200 Torr while the DCM dependent oxygenation curve measured by spectroscopic techniques suggests the DCM sites which affect the allosteric equilibrium are fully occupied at 75 Torr. To determine whether the difference is explainable by DCM binding differences between crystalline and noncrystalline hemoglobin, the DCM-hemoglobin complex was studied by low angle neutron scattering in… more
Date: January 1, 1978
Creator: Schoenborn, B P & North, B E
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Molecular sieving action of the cell membrane during gradual osmotic hemolysis

Description: Rat erythrocytes were hemolyzed by controlled gradual osmotic hemolysis to study cell morphology and hemoglobin loss from individual cells. Results suggest that each increase in the rate of loss of a protein from the cells during the initial phases of controlled gradual osmotic hemolysis is caused by the passage of a previously impermeable species across the stressed membrane. Similarly, during the final stages of controlled gradual osmotic hemolysis, each sharp decrease in the rate of loss of … more
Date: May 1, 1977
Creator: MacGregor, R. D. II
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chain heterogeneity as demonstrated by the ferricyanide oxidation of the one-site reduced bovine methemoglobin. Progress report, December 1, 1977--November 30, 1978. [After pulsed radiolytic reduction]

Description: With the pulse radiolysis technique, a single chain of tetrameric bovine methemoglobin (..cap alpha../sub 2//sup III/..beta../sub 2//sup III/) is reduced, producing a mixture of valence hybrids consisting of ..cap alpha../sup III/..cap alpha../sup II/..beta../sub 2//sup III/ and ..cap alpha../sub 2//sup III/..beta../sup III/..beta../sup II/. The oxidation of these partially reduced hemoglobins with ferricyanide was studied. It was found that the rate of oxidation of one of them proceeds 6 to 11… more
Date: January 1, 1978
Creator: Ilan, Y A & Czapski, G
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Determination of structural water by neutron protein crystallography: an analysis of the carbon monoxide myoglobin water structure

Description: An ideal technique for studying the water structure of proteins using neutron crystallography is discussed. The advantages of using deuterons (D/sub 2/O) instead of hydrogen (H/sub 2/O) are explained. The results of an early unrefined met myoglobin neutron analysis are presented. More recent high resolution x-ray analysis of met myoglobin and refined neutron analysis of carbon monoxide myoglobin water structure were compared. Neutron maps were included.
Date: January 1, 1979
Creator: Schoenborn, B. P. & Hanson, J. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Weak binding gases as modulators of hemoglobin function

Description: Studies are reported in which the mechanisms of binding of inert gaseous agents to hemoglobin and myoglobin are investigated. Specific binding sites are mapped. Possible effects on sickle cell formation and oxygen binding are discussed. (ACR)
Date: unknown
Creator: Schoenborn, B. P.; Saxena, A. & North, B. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Some recent aspects of relaxation line shapes in Moessbauer spectroscopy. [White noise approximation]

Description: Theoretical development in the line shape calculation of Mossbauer resonance spectra involving spin relaxation effects is introduced. The ''eigenvalue'' procedure of calculating line shapes saves computational times by two orders of magnitude compared to traditional methods. This was illustrated by calculating the relaxation spectra of hemoglobin cyanide and a GAMMA/sub 8/ quartet electronic state. The ''white noise approximation'' involved in all the relaxation theory is discussed, and its lim… more
Date: January 1, 1977
Creator: Shenoy, G. K. & Dunlap, B. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Dichloromethane as an antisickling agent in sickle cell hemoglobin

Description: Observations are reported that show that dichloromethane (DCM) does have a significant effect on the oxygen binding properties of hemoglobin. At DCM pressures high enough to prevent or reverse sickling, DCM would lower the oxygen affinity of hemoglobin, therefore reducing oxygen transport at low oxygen pressure. This decrease in oxygen affinity might, however, increase the oxygen availability to tissue as long as a sufficiently large lung P/sub O/sub 2// is maintained. Crystallographic studies … more
Date: January 1, 1977
Creator: Schoenborn, Benno P. & North, Barry E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chain inequivalence in bovine methemoglobin. Progress report, December 1, 1979-November 30, 1980

Description: Using pulse-radiolysis, a single-heme in the tetramer of bovine methemoglobin was reduced to the ferro state, producing a valence hybrid (VH). The kinetics of oxygen binding to the VH as well as the re-oxidation of the ferro-heme to the ferric state were studied as a function of pH. The kinetics of the oxygenation revealed the existence of two species, characterized by high and low affinities for oxygen that are associated with two quaternary structures (R and T, respectivey). Above pH 7.7 only… more
Date: January 1, 1980
Creator: Ilan, Y. A.; Ilan, Y.; Chevion, M. & Czapski, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of a radiation-induced. cap alpha. -thalassemia on the production of multiple forms of hemoglobins in fetal mice

Description: Embryonic hemoglobins in ..cap alpha..-thalassemic heterozygotes and normal fetuses were compared to study the effects of the deficient ..cap alpha.. chain on the synthesis of hemoglobins in the nucleated embryonic erythrocytes derived from the fetal yolk sac. Acrylamide gel electrophoresis showed that less hemoglobin Ell (..cap alpha../sub 2/y/sub 2/) was formed in ..cap alpha..-thalassemic heterozygotes between 12/sup 1///sub 2/ and 14/sup 1///sub 2/ days of gestation. Quantitation of in vitr… more
Date: January 1, 1978
Creator: Popp, R. A.; Bradshaw, B. S. & Hirsch, G. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Quatenary structure of methemoglobin II. Pulse radiolysis study of the binding of oxygen to the valence-hybrid. Progress report, December 1, 1978-November 30, 1979

Description: The pulse-radiolysis of solutions of adult human methemoglobin was used in order to reduce a single heme-iron within the protein tetramers. The valence-hybrids thus formed were reacted with oxygen. Kinetics of the reactions were studied. The effects of pH and inositol-hexaphosphate were examined. The kinetics of the ligation of oxygen to stripped valence-hybrids showed a single-phase behavior at the pH range 6.5 to 9. As the pH was lowered below 6.5 a second, slower phase became apparent. In th… more
Date: January 1, 1979
Creator: Chevion, M; Ilan, Y A; Samuni, A; Navok, T & Czapski, G
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen