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  • Industrial Chemistry  (4)
  • Life and Medical Sciences  (3)
  • Biochemistry and Biotechnology  (2)
  • 1970-1974  (9)
Collection
Keywords
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Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    The structure of the hemocytes of Galleria mellonella (Lepidoptera) (1973)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 139 (1973), S. 105-123 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Four hemocyte types have been identified in the late last larval instar of Galleria mellonella. Plasmatocytoids are round to spindle shaped cells, 10-20 μ long and 5-10 μ wide. The cytoplasm contains no distinguishing inclusions. Golgi complexes, rough endoplasmic reticulum and free ribosomes are abundant. Granular hemocytes are oval shaped cells, 10-20 μ long and 5-10 μ wide. The granules, their most characteristic feature, have a diameter of 0.2 μ, a microtubular sub-structure, and are made up of acidic mucosubstances. Lipid droplets may be present in these cells at some stage of development. These cells appear to be phagocytic. Spherule cells are oval shaped, 15-20 μ long and 5-10 μ wide. The spherules, approximately 2 μ in diameter, have a highly ordered substructure and are made up of acidic mucosubstances. Oenocytoids are the largest cells, 20 by 40 μ. The cytoplasm contains mostly free ribosomes and microtubules.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051390107
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  • 2
    Electronic Resource
    Electronic Resource
    Measurement of yeast concentrations in liquid hydrocarbon fermentations: Influence of experimental conditions and statistical significance of the results obtained (1972)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 14 (1972), S. 609-615 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The influence of the following factors on the measurement of yeast concentration in liquid hydrocarbon fermentations was studied: surfactant, type (Tween 20, Tween 80, and G 3300), yeast concentration (0.215 to 0.272 and 3.37 to 4.08 g/liter, as dry matter), oil concentration (8.32 and 61.6 g/liter), surfactant, concentration (0.515, 1.030, 1.545, and 2.060 g/liter), and time of contact of the surfactant with the oil-yeast-aqueous medium mixture (2 and 10 min). The statistical significance of the obtained results was determined.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260140406
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  • 3
    Electronic Resource
    Electronic Resource
    Enzyme yields from cells of brewer's yeast disrupted by treatment in a horizontal disintegrator (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 16 (1974), S. 623-634 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Maltase, phosphatase, malate dehydrogenase, glucose-6-phosphate dehydrogenase, and 6-phosphogluconate dehydrogenase activities were determined in the supernatant of brewer's yeast cells from samples taken at various intervals during a 90 min treatment in a Dyno-Mill disintegrator.In an attempt to find optimum operating conditions, the following parameters were varied: speed of rotation of the agitator, flow rate, yeast concentration in the slurry and bead diameter, and the specific rate of extraction was determined for each such variation. Analysis of the data showed that, superimposed upon extraction, there was a progressive but slow loss of total activities. Enzyme release could be expressed as an approximately first-order chemical reaction. The results compared well with those of Follows et al. (Biotechnol. Bioeng.), 13, 549 (1971) and showed that the Dyno-Mill can be operated under proper conditions without significant loss of enzyme activity and with high yields.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260160506
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  • 4
    Electronic Resource
    Electronic Resource
    Genesis of the reproductive system of mosquitoes II. Male of Aedes stimulans (walker)Supported by a grant (GM-12612) from the National Institutes of Health followed by another (CC-00335) awarded by the Communicable Disease Center of the U.S. Public Health Service. (1970)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 131 (1970), S. 329-357 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The imaginal male of mosquitoes bears a combination of organs and appendages that make it morphologically distinctive. Its reproductive organs produce sperm cells, convey and extrude them, provide accessory fluids, and insure copulation and insemination. In Aedes stimulans (Walker) these organs are derived from one of the two sets of primordia provided by the embryo. The second set of primordia is capable of producing the feminine reproductive system under unusual circumstances.Testes are derived from two compact ovoid masses of cells suspended in the hemocoel of abdominal segment 6. Each enlarges slowly throughout larval instars 1-3 and elongates very rapidly late in instar 4. Specialization of the cellular mass into sperm cells proceeds forward from the caudal end early in pupal life. From the beginning, a sheath of nutritive cells or fatbody encases each gonad, and no tracheation of the mass is evident although one small trachea sends branches to the encasing fatbody late in larval life.The efferent canal from each testis is derived from a tenuous filament extending caudally from each gonad to the venter of segment 9 and a small cluster of cells in the wall of the hemocoel on the ental surface of imaginal disc 9. Early in pupal life the filaments become the tubular vasa efferentia. The caudal clusters are primordial terminal parts of the lateral tract that become vasa deferentia, seminal vesicles and associated accessory glands. The ejaculatory canal comes from a short pouch derived from the median genital plate of disc 9.All external parts except the paraprocts are products of disc 9. The bilateral buds begin to proliferate in larval instar 4 and become the basistyles, dististyles and claspettes of the gonapophyses during pupal life. The phallosome is derived from the median genital plate.Primordia of a possible feminine reproductive system and cerci remain undifferentiated and disappear early in pupal life in the normal course of events. Primordia that were recognizable include those of ovaries, parts of lateral oviducts, median genital tract and cerci.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051310307
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  • 5
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Ausweitung der Wirksamkeit eines Nachverbrennungskatalysators (1972)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 44 (1972), S. 957-962 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Ausgehend von einem alkali-haltigen Kupferoxid/Manganoxid-Katalysator auf einem Kieselsäure-Träger wurde der Einfluß von n- und p-Dotierungen auf die Aktivität von Nachverbrennungskatalysatoren zur Reinigung von Motorabgasen untersucht. Durch Anwendung eines die Zeitabhängigkeit der Reaktionseinstellung erfassenden Meß verfahrens gelang die exakte Zuordnung von Umsatz und Katalysatortemperatur auch bei exothermen Reaktionen. Die Katalysatoraktivität wird durch p-Dotierung mit Alkali verschlechtert, durch n-Dotierung mit vierwertigen Ionen dagegen gesteigert. Vor allem erweist sich Thorium als äußerst wirkungsvoller Promotor. Neben der Temperaturabhängigkeit des Umsatzes lassen sich auch reaktionskinetische Parameter bestimmen. Die Ergebnisse stehen mit den Vorstellungen über die Beziehung zwischen Halbleiter- und Katalysatoreigenschaften von Metalloxiden im Einklang.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330441602
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Ausweitung der Wirksamkeit von Nachverbrennungskatalysatoren, Teil II (1974)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 46 (1974), S. 483-483 
    Details
    ISSN: 0009-286X
    Keywords: Katalysatoren ; Abgase ; Umweltschutz ; Oxidationskatalysatoren ; CO-Oxidation ; NOx-Reduktion ; Trägerkatalysatoren ; Katalysatorträger ; Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330461106
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  • 7
    Electronic Resource
    Electronic Resource
    Untersuchung der katalytischen Aktivität einiger Molekularsiebe beim Cracken von Kohlenwasserstoffen (1974)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 46 (1974), S. 1055-1055 
    Details
    ISSN: 0009-286X
    Keywords: katalytische Spaltung ; Produkt-Verteilung ; Kohlenwasserstoffe ; Pulsreaktor ; Molekularsiebe ; Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330462409
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  • 8
    Electronic Resource
    Electronic Resource
    Versteifte und abgesetzte SchalenVortrag auf dem Dechema-VTG Symposion „Konstruktive Aufgaben im Apparatebau“ 7. und 8. Dezember 1972 in Frankfurt/M.. Stabilitätsuntersuchungen an dünnwandigen Kreiszylindern unter axialsymmetrischer Belastung (1973)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 45 (1973), S. 770-776 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es werden Stabilitätsuntersuchungen an dünnwandigen Kreiszylindern vorgenommen. Es zeigt sich, daß man bei Optimierungsuntersuchungen versteifter Zylinder nicht mit den Verzweigungslasten rechnen darf, sondern zur Berücksichtigung der Vorbeulenempfindlichkeit zweckmäßig als maßgebenden Kennwert eine geeignete Nachbeullast einführt. Weiterhin werden die Beullasten eng und weit versteifter Zylinder untersucht; dabei wird auch der Einfluß exzentrischer Steifenanordnung behandelt. Der letzte Teil befaßt sich mit Zylindern, die in Axialrichtung abgesetzt und zentrisch oder exzentrisch gestoßen sind.
    Additional Material: 21 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330451104
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  • 9
    Electronic Resource
    Electronic Resource
    Inhibition of marrow granulocytic colony formation by phytohemagglutininAided by grant T-559 from the American Cancer Society. (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 82 (1973), S. 277-283 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The effect of phytohemagglutinin (PHA) on the growth and number of granulocytic colonies (GC) developing on agar from bone marrow and spleen cells of normal and erythroleukemic mice inoculated with Rauscher leukemogenic virus was studied. Equal number of marrow cells from erythroleukemic mice produced twice as many colonies as those from normal mice. The number of GC developing from either normal and leukemic spleen cells was only 20% to 25% of that arising from marrow cells. The number of cells within each colony was significantly larger in GC formed by myelogenous leukemic cells than those arising from normal cells even though they had similar morphologic features. The addition of 100 μg of PHA per 105 cells reduced the number of GC arising from normal and leukemic cells by 35% and 50%, respectively. Treatment with periodate which mainly inhibits its mitogenic activity, abolished the inhibitory effects of PHA on proliferation of granulocytic cells.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1040820216
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