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  • 1
    Electronic Resource
    Electronic Resource
    Plasma insulin and carbohydrate metabolism after sucrose ingestion during rest and prolonged aerobic exericise (1973)
    Springer
    Pflügers Archiv 342 (1973), S. 207-218 
    Details
    ISSN: 1432-2013
    Keywords: RQ ; Insulin ; Glucose ; Lactate ; Pyruvate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary RQ, plasma insulin, blood glucose, lactate and pyruvate were measured in six fit, normal subjects during a series of exercise and rest experiments with and without sucrose ingestion. Subjects exercised on a bicycle ergometer for 50 min of every hour for 6 h at about 47% of the group's average maximal aerobic capacity. In the resting experiments, the subjects sat for 6 h in an armchair. A solution containing 100 g of sucrose was ingested at the beginning of the fourth hour during the sucrose experiments. Ingestion of sucrose caused a significant increase in RQ, plasma insulin, blood glucose, lactate and pyruvate in both exercise and rest experiments. Insulin, lactate and pyruvate concentrations rose higher during rest after sucrose ingestion than during exercise. The time courses of the changes in RQ, insulin, glucose, lactate and pyruvate after sucrose ingestion, suggest that glucose entering the cell during rest is immediately oxidized, while during work there is some delay in the oxidation of glucose.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00591369
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  • 2
    Electronic Resource
    Electronic Resource
    The significance of an increased RQ after sucrose ingestion during prolonged aerobic exercise (1973)
    Springer
    Pflügers Archiv 342 (1973), S. 199-206 
    Details
    ISSN: 1432-2013
    Keywords: RQ ; C14O2 ; Lactate ; Pyruvate ; Carbohydrate Utilization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Four well-trained male subjects worked for periods of 6 h on bicycle ergometers at work loads requiring about 47% of their maximal aerobic capacity. In one series of studies they received only water; in a second series they received 100 g of sucrose containing 100 μc U-C14-labelled sucrose at the beginning of the fourth hour of work. In a third series of experiments, the same subjects received 100 g of non-labelled sucrose at the beginning of the fourth hour. During the experiment without U-C14-labelled sucrose, blood samples were withdrawn and analysed for glucose, lactate and pyruvate content. Data from C14O2 recovery in expired air showed a good correlation with the amount of carbohydrate oxidized during the sucrose experiment. Peak values for the respiratory exchange ratio showed the same time response as those observed for the C14O2 in the expired air. It is concluded that the observed rise in RQ after sucrose ingestion, under the conditions studied, is of metabolic origin, resulting from a complete conversion of pyruvate to CO2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00591368
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  • 3
    Electronic Resource
    Electronic Resource
    Li3BS3 und LiSrBS3: Neue Orthothioborate mit trigonal-planar koordiniertem BorProfessor Wolfgang Jeitschko zum 60. Geburtstag gewidmet (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1508-1514 
    Details
    ISSN: 0044-2313
    Keywords: Orthothioborates ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Li3BS3 and LiSrBS3: New Orthothioborates with Trigonal Planar Boron CoordinationWe report on the two new orthothioborates Li3BS3 (Pnma; a = 8.144(1) Å, b = 10.063(2) Å, 6.161(1) Å; Z = 4) and LiSrBS3 (Pnma; a = 7.557(1) Å, b = 9.083(2) Å, c = 7.049(1) Å: Z = 4). The two new phases were prepared by reaction of the metal sulfides, amorphous boron, and sulfur at 700°C. Both compounds contain isolated, planar [BS3]3--anions. The lithium ions have fourfold (Li3BS3) and sixfold (LiSrBS3) sulfur coordination, the strontium ion shows an eightfold sulfur coordination. The two compounds represent new A3BX3 resp. AA′BX3 structure types.
    Notes: Es wird über die beiden Orthothioborate Li3BS3 (Pnma; a = 8,144(1) Å, b = 10,063(2) Å, 6,161(1) Å; Z = 4) und LiSrBS3 (Pnma; a = 7,557(1) Å, b = 9,083(2) Å, c = 7,049(1) Å; Z = 4) berichtet. Die beiden neuen Phasen wurden durch Hochtemperatur-Schmelzreaktion aus den Metallsulfiden, amorphem Bor und Schwefel bei 700°C dargestellt. Beide Verbindungen enthalten isolierte, planare [BS3]3--Anionen. Die Lithiumionen sind vierfach (Li3BS3) bzw. sechsfach (LiSrBS3) von Schwefel umgeben, das Strontiumion weist eine achtfache Schwefelkoordination auf. Li3BS3 und LiSrBS3 bilden neue A3BX3 bzw. AA′BX3-Strukturtypen.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966220912
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  • 4
    Electronic Resource
    Electronic Resource
    Cs2B2S4 - Ein Salz der dimeren MetathioborsäureProfessor Peter Paetzold zum 60. Geburtstag gewidmet (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1330-1337 
    Details
    ISSN: 0044-2313
    Keywords: Thioborates ; syntheses ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cs2B2S4 - A Derivative of the Dimeric Metathioboric AcidCs2B2S4 (structure: I41/acd; a = 7.270(1) Å, c = 35.737(7) Å; Z = 8; substructure: I4/mmm; a′ = 5.141(1) Å, c′ = 17.868(4) Å, Z = 2) is prepared by the reaction of cesium sulfide with stoichiometric amounts of boron and sulfur (effective molar ratio M:B:S = 2:2:4) at 600°C and subsequent annealing. The crystal structure contains isolated [B2S4]2- groups consisting of four-membered B2S2 rings with two exocyclic sulfur atoms on each of the boron atoms. The cesium cations are nine-coordinate between these rings. The structural feature of two edge-sharing BS3 groups forming an isolated anion appears for the first time in thioborate chemistry, although it is known as a part of the polymeric network in B2S3.
    Notes: Cs2B2S4 (I41/acd; a = 7,270(1) Å, c = 35,737(7) Å; Z = 8; Subzelle: I4/mmm; a′ = 5,141(1) Å, c′ = 17,868(4) Å, Z = 2) wird durch Reaktion von Caesiumsulfid Cs2S mit amorphem Bor und elementarem Schwefel im Verhältnis 1:2:3 bei einer Reaktionstemperatur von 600°C mit anschließendem Tempern dargestellt. Die Kristallstruktur besteht aus molekularen, planaren [B2S4]2--Einheiten mit extrem gespannten [B2S2]-Vierringen, zwischen denen sich die neunfach koordinierten Alkalimetallkationen befinden. Das Strukturmotiv zweier kantenverknüpfter BS3-Gruppen wird hier erstmals in der Chemie der Thioborate isoliert beobachtet, ist jedoch als Baustein des polymeren Bor-Schwefel-Gerüsts im B2S3 bekannt.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210810
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