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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 3019-3023 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A method for measuring the force arising from the attraction between a charged electrode and another electrode on which charges have been induced has been developed using a torsion balance operated in the ac mode far above the resonance frequency of the balance. The movement of the balance is sensed by a capacitive position transducer which uses two lock-in amplifiers to demodulate the position signal. The balance itself and the position transducer are described. The sensitivity of the position transducer is given, and results from three electrode geometries are discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Diabetes mellitus ; Long-term diabetes ; Lipoproteins ; Apolipoproteins ; HDL cholesterol ; Triglycerides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary All diabetic patients suffering from the disease for at least 20 years and living in the closed area of the Erfurt district in 1970 have been followed prospectively since that time. In 47 of them still alive in 1985, i.e. after more than 35 years of diabetes, serum lipid and apolipoprotein concentrations were measured and compared to those of non-diabetic subjects without cardiovascular diseases (n=47) pair-matched by sex, age, and body weight. In males (n=27) significantly (p〈0.01) higher levels of HDL cholesterol and apolipoprotein A–I as well as lower concentrations of triglycerides and a lower total cholesterol/HDL cholesterol risk ratio than in nondiabetic control subjects could be found. In long-term diabetic females (n=20), apolipoprotein A–I levels were also increased (p〈0.02). Trends in HDL cholesterol and triglycerides were similar to those found in males but did not reach statistical significance. Higher concentrations of total cholesterol (p〈0.02), LDL cholesterol (P〈0.05), and apolipoprotein B (p〈0.02), however, did not fit in with a beneficial lipoprotein pattern. The frequency of pathological lipoprotein patterns was not higher than among the non-diabetic control subjects (32% and 40%, respectively). According to these findings an antiatherogenic lipoprotein pattern might be considered, at least in males, as one of the determinants causing the multifactorial event of long-term survival in diabetes.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1076
    Keywords: Pyruvate dehydrogenase deficiency ; Hyperammonaemia ; Peritoneal dialysis ; Lipoic acid ; Plasma amino acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 2-day-old girl developed a severe lactic acidosis with a normal lactate/pyruvate ratio and hyperammonaemia. Plasma arginine and citrulline levels were below the limit of detection. In muscle total pyruvate dehydrogenase complex (PDHC) and pyruvate decarboxylase (E1) activities were reduced to a fraction of lower control values. The acute neonatal period was bridged with peritoneal dialysis, dichloroacetate therapy, supplements of arginine and branched chain amino acids, a complete vitamin B complex and lipoic acid. Lactate homeostasis responded to pharmacological supplements of lipoic acid. At age 1 year the child was hypotonic, showed severe developmental retardation, optic atrophy and cranial dysmorphism. She died aged 1 year 8 months with signs of respiratory paralysis but with normal lactate levels under assisted breathing. Pathological findings at autopsy were suggestive of Leigh syndrome, interstitial pneumonia and extensive fatty infiltration of hepatocytes. Regression analysis of data from 187 plasma amino acid determinations from the patient over a period of 1 year 8 months revealed a persistent imbalance involving alanine, glutamic acid, glutamine, proline, citrulline and branched chain amino acids. Aspects of acute and long-term therapy in this patient and some implications of the imbalances in plasma amino acids are discussed.
    Type of Medium: Electronic Resource
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