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  • Springer  (59)
  • Public Library of Science  (12)
  • National Academy of Sciences  (11)
  • American Institute of Physics  (5)
  • 2015-2019  (64)
  • 1985-1989
  • 1975-1979  (16)
  • 1970-1974  (7)
  • 1955-1959
  • 2018  (64)
  • 1975  (16)
  • 1973  (7)
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  • 2015-2019  (64)
  • 1985-1989
  • 1975-1979  (16)
  • 1970-1974  (7)
  • 1955-1959
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 13 (1975), S. 506-512 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new deficient G-6PD variant, Gd(-) Abrami, was found in granulocytes, platelets and red blood cells of a 65-year-old woman with myelofibrosis. Enzyme and immunological titrations showed that only the deficient variant was present in blood cells whereas both the normal and abnormal enzymes were found in the fat cells of this patient. These results seem to indicate that the granulocytes, platelets and erythrocytes of this woman with myelofibrosis have arisen from a single abnormal precursor the functional X chromsome of which is the one carrying the abnormal G-6PD gene.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 18 (1973), S. 261-270 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé Les auteurs ont dosé l'activité et déterminé la migration électrophorétique de la glucose-6-phosphate déshydrogénase érythrocytaire chez 301 sujets mâles de race noire. Les enzymes de migration anormale et/ou déficitaires ont été semi-purifiées et totalement caractérisées sur le plan cinétique et thermodynamique; 9 phénotypes différents ont ainsi été séparés: $$\begin{gathered} {\text{199 Gd ( + ) B, soit 66,1\% 2 Gd ( + ) Madrona}} \hfill \\ {\text{ 59 Gd ( + ) A, soit 19,6\% 1 Gd ( + ) Baltimore}} \hfill \\ {\text{ 24 Gd ( - ) A, soit 8\% 1 Gd ( + ) Martinique}} \hfill \\ {\text{ 12 Gd ( - ) Mali, soit 4\% 1 Gd ( - ) Matam}} \hfill \\ {\text{ 2 Gd ( - ) Dakar}} \hfill \\ \end{gathered} $$ De plus, une variante très lente a été découverte à l'état hétérozygote chez une femme martiniquaise mais n'a pu être caractérisée. Sa mobilité était de 65 à 70% de la normale. La fréquence des enzymes de phénotype Gd(-) Mali qui représentent la majorité des déficits dans le groupe Sénégal-Mali est discutée. De même a été émise l'hypothèse que les phénotypes Gd(-) Dakar et Gd(-) Matam pouvaient être dus à un événement génétique ayant intéressé un gène «A» (A (+) ou A (-)). Le phénotype Matam qui représente une enzyme de migration «A» cinétiquement indistinguable des enzymes «Mali» peut évoquer une recombinaison intracistronique entre ces deux gènes dans une région où tous deux sont fréquents. Enfin, aucune corrélation n'est retrouvée entre les déficits en G-6PD et les hémoglobinopathies A+S, A+C et S+C.
    Abstract: Zusammenfassung Die Aktivität und die elektrophoretische Charakteristik der Glucose-6-Phosphat-Dehydrogenase aus Erythrocyten bei 301 männlichen in Frankreich lebenden Versuchspersonen schwarzer Hautfarbe wurde bestimmt. Die Enzyme mit anormaler elektrophoretischer Charakteristik und/oder verminderter Aktivität sind partiell angereichert und kinetisch und thermodynamisch vollständig charakterisiert worden; derart wurden 9 verschiedene Phäntypen dargestellt. $$\begin{gathered} {\text{199 Gd ( + ) B zu 66,1\% 2 Gd ( + ) Madrona}} \hfill \\ {\text{ 59 Gd ( + ) A zu 19,6\% 1 Gd ( + ) Baltimore}} \hfill \\ {\text{ 24 Gd ( - ) A zu 8\% 1 Gd ( + ) Martinique}} \hfill \\ {\text{ 12 Gd ( - ) Mali zu 4\% 1 Gd ( - ) Matam}}{\text{.}} \hfill \\ {\text{ 2 Gd ( - ) Dakar}} \hfill \\ \end{gathered} $$ Darüber hinaus wurde eine sehr langsame Variante entdeckt, und zwar heterozygot bei einer Frau von Martinique. Diese Variante konnte nicht vollständig charakterisiert werden. Ihre elektrophoretische Beweglichkeit betrug 65 bis 70% des Normalwertes. Die Häufigkeit der Enzyme vom Phänotypen Gd(-) Mali, die die Mehrheit der Defekte in der Gruppe Sénégal-Mali ausmachen, wird ausführlich besprochen. Weiterhin wird die Hypothese aufgestellt, daß die Phänotypen Gd(-) Dakar und Gd(-) Matam von einer genetischen Modifikation herrühren, die ein Gen A (A (+) order A (-)) betreffen. Der Phänotyp Matam, der ein Enzym vom Typ A ist und der kinetisch den Enzymen Mali gleicht, läßt an eine Rekombination zwischen diesen beiden Genen in einem Gebiet denken, in dem beide häufig vorkommen. Schließlich findet sich keinerlei Korrelation zwischen den Defizienzen an G-6-PD und den Hämoglobinopathien A+S, A+C und S+C.
    Notes: Summary The activity of erythrocytic glucose-6-phosphate dehydrogenase was assayed and its electrophoretic mobility determined in 301 male black people. The enzymes of abnormal mobility with/or without deficiency were partially purified and totally characterized from a kinetic and thermodynamic aspect; 9 different phenotypes were separated: $$\begin{gathered} {\text{199 Gd ( + ) B, i - e 66,1\% 2 Gd ( + ) Madrona}} \hfill \\ {\text{ 59 Gd ( + ) A, i - e 19,6\% 1 Gd ( + ) Baltimore}} \hfill \\ {\text{ 24 Gd ( - ) A, i - e 8\% 1 Gd ( + ) Martinique}} \hfill \\ {\text{ 12 Gd ( - ) Mali, i - e 4\% 1 Gd ( - ) Matam}} \hfill \\ {\text{ 2 Gd ( - ) Dakar}} \hfill \\ \end{gathered} $$ Moreover, a very slow variant was discovered in the heterozygous state in a woman from Martinique. Its mobility was about 65–70% of normal. The frequency of the Gd(-) Mali phenotype enzymes, which represents the majority of the G-6PD variants with deficiency in the Senegal-Mali group, is discussed. In the same way, it was suggested that both Gd(-) Dakar and Gd(-) Matam phenotypes could be due to a genetic change for an A gene (A (+) or A (-)). The Matam phenotype, representing an enzyme of “A” mobility which cannot be kinetically distinguished from the Mali enzymes, may suggest a recombination between both genes in a country where they are frequent. Finally no correlation was found between G-6PD deficiency and the A/S, A/C and S/C haemoglobin diseases.
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  • 4
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new case of glucose phosphate isomerase deficiency associated with congenital nonspherocytic hemolytic anemia is described in a 12-year-old girl of Spanish origin. The parents exhibited erythrocyte glucose phosphate isomerase activity between 50 and 60% of normal. The enzyme of the propositus had normal Michaelis-Menten constants both for F-6-P and G-6-P, but abnormal pH optimum and decreased heat stability at 48°C. On starch-gel electrophoresis the father's enzyme was normal but the mother's showed a cathodic migrating band in addition to the normal one. The enzyme from the propositus exhibited only one band with cathodal mobility of 116% of the main band found in normal subjects. It is postulated that the propositus is double heterozygous for two abnormal alleles, and the mother contributes a mutant allele with abnormal electrophoretic mobility and thermolability at 48°C whereas the father contributes an allele without enzymatic activity.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 29 (1975), S. 271-280 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Erythrocyte pyruvate kinase (PK) from 5 patients with congenital non-spherocytic hemolytic anemia and erythrocyte PK deficiency have been studied by immunological methods and electrofocusing. L type immunologically related PK was titrated in crude hemolysate with anti human liver L type PK rabbit serum and M2 type immunologically related PK with anti human leukocyte M2 type PK serum. After partial purification, molecular specific activity of erythrocyte PK was measured by immunoinactivation and electroimmunodiffusion with anti L type PK serum. Partially purified erythrocyte PK was focused on continuous sucrose gradient with 2% ampholines covering the pH range 5–8. PK enzymatic deficiency was due two times to a lowered molecular specific activity of the PK variants, the concentration of PK antigen being in the normal range. In the 3 other cases enzyme activity and immunological reactivity were likewise lowered. In the 2 patients with the most marked erythrocyte PK deficiency about 50% of the residual activity in crude hemolysate were non inhibited by anti L type PK serum, but were inhibited by anti M2 type PK serum. In 3 patients, the electrofocusing pattern of partially purified PK was significantly different from that of normal controls. In conclusion, the heterogeneity of the molecular mechanisms of the deficiency on the one hand, and the abnormalities of electrofocusing patterns on the other hand, seem to indicate that erythrocyte PK deficiency is due to the synthesis by muted structural genes of various abnormal PK molecules. The high ratio of M2 type PK in the most deficient hemolysates may be due to a compensatory process.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 27 (1975), S. 247-250 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new G-6PD variant with enzyme deficiency is described in a 7-month-old Turkish boy without any hemolytic manifestation, except neonatal hyperbilirubinemia. The main characteristics of this variant were the following: Severe enzyme deficiency in erythrocytes (8% of normal), fast starch-gel-electrophoretic mobility (110% of normal), increased Ki NADPH with respect to NADP+, slightly biphasic pH curve, enzyme instability, in vivo and in vitro, decreased molecular specific activity (58% of normal).
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 28 (1973), S. 311-311 
    ISSN: 1432-2234
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 29 (1973), S. 359-374 
    ISSN: 1432-2234
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The influence of vibronic coupling on the average paramagnetism and the paramagnetic anisotropy of a cubic complex, the electronic ground state 2T2 of which is perturbed by a trigonal field, is investigated. It is necessary to introduce the following parameters: the spin-orbit coupling coefficient λ, the vibronic coupling coefficient x, the frequency ħω g3 of the E modes of vibration, the splitting Δ of the 2 T 2 level in the trigonal field and the covalence parameter k. For given x and $$\varrho \left( { = \frac{{3\lambda }}{{2h\omega _\varepsilon }}} \right)$$ , the influence of the vibronic coupling is more important if in the trigonal field the electronic ground state of the complex is 2E than if it is 2A. For given x and v (=Δ/λ), the smaller ¦ρ¦, the greater the influence of vibronic coupling. The respective effects of vibronic coupling and covalence are compared. Finally, the case of the first row transition-metal complexes is briefly discussed.
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  • 9
    Publication Date: 2018-03-19
    Description: Reducing premature mortality associated with age-related chronic diseases, such as cancer and cardiovascular disease, is an urgent priority. We report early results using genomics in combination with advanced imaging and other clinical testing to proactively screen for age-related chronic disease risk among adults. We enrolled active, symptom-free adults in a study of screening for age-related chronic diseases associated with premature mortality. In addition to personal and family medical history and other clinical testing, we obtained whole-genome sequencing (WGS), noncontrast whole-body MRI, dual-energy X-ray absorptiometry (DXA), global metabolomics, a new blood test for prediabetes (Quantose IR), echocardiography (ECHO), ECG, and cardiac rhythm monitoring to identify age-related chronic disease risks. Precision medicine screening using WGS and advanced imaging along with other testing among active, symptom-free adults identified a broad set of complementary age-related chronic disease risks associated with premature mortality and strengthened WGS variant interpretation. This and other similarly designed screening approaches anchored by WGS and advanced imaging may have the potential to extend healthy life among active adults through improved prevention and early detection of age-related chronic diseases (and their risk factors) associated with premature mortality.
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 10
    Publication Date: 2018-01-08
    Description: Mice subjected to cold or caloric deprivation can reduce body temperature and metabolic rate and enter a state of torpor. Here we show that administration of pyruvate, an energy-rich metabolic intermediate, can induce torpor in mice with diet-induced or genetic obesity. This is associated with marked hypothermia, decreased activity, and decreased metabolic rate. The drop in body temperature correlates with the degree of obesity and is blunted by housing mice at thermoneutrality. Induction of torpor by pyruvate in obese mice relies on adenosine signaling and is accompanied by changes in brain levels of hexose bisphosphate and GABA as detected by mass spectroscopy-based imaging. Pyruvate does not induce torpor in lean mice but results in the activation of brown adipose tissue (BAT) with an increase in the level of uncoupling protein-1 (UCP1). Denervation of BAT in lean mice blocks this increase in UCP1 and allows the pyruvate-induced torpor phenotype. Thus, pyruvate administration induces torpor in obese mice by pathways involving adenosine and GABA signaling and a failure of normal activation of BAT.
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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