Bibliothek

feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
  • 1
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 107 (1982), S. 0 
    ISSN: 1365-2133
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: We have studied 122 patients with polychlorinated biphenyls (PCB) poisoning. All of the patients had one or more signs of poisoning, particularly mucocutaneous pigmentation, acneform eruptions, deformity of nails, dry skin or dyshidrosis. A marked increase of blood PCB levels was found in every case.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    Digitale Medien
    Digitale Medien
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Entomology 29 (1984), S. 233-255 
    ISSN: 0066-4170
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Biologie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of periodontal research 18 (1983), S. 0 
    ISSN: 1600-0765
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Lipopolysaccharide (LPS) has been purified from Bacteroides gingivalis. The purity of this LPS is evidenced on ultracentrifugation, immunoelectrophoresis, and chemical analyses. On comparison with LPS from aerobic enteric organisms, LPS from Bacteroides gingivalis exhibits minimal potency when tested for pyrogenicity in rabbits and mitogenicity in mouse spleen cells. On the other hand, purified LPS from Bacteroides gingivalis exhibits high potency in its ability to stimulate 45Ca release from prelabeled fetal rat bones and to inhibit Ca influx into osteoclast-like cells.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Il nuovo cimento della Società Italiana di Fisica 4 (1984), S. 280-292 
    ISSN: 0392-6737
    Schlagwort(e): Anelasticity ; internal friction ; and mechanical resonances
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Beschreibung / Inhaltsverzeichnis: Riassunto Un nuovo fenomeno di accoppiamento elettromeccanico è stato determinato nella ceramica elettroottica PLZT 7/65/35 con l’aiuto di un sistema interferometro-laser a raggio doppio. Specificamente, quando si applica un voltaggio d.c. a piccola ampiezza attraverso un campione vergine di materiale, il campione deflette nella direzione opposta alla direzione positiva del voltaggio con nessuno sforzo assiale misurato associato. L’osservazione resta valida quando è innescata la polarità del voltaggio. Quando si applicano voltaggi a.c., i comportamenti vibrazionali e il senso degli spostamenti meccanici dipendono dagli intervalli di frequenza dei voltaggi applicati. In particolare, essi cambiano quando il campione passa attraverso quelle specifiche risonanze meccanichesolo con anelli nodali e non attraverso quelle con anelli nodalie diametri nodali.
    Kurzfassung: Резюме Обнаружено новое явление электромеханической связи в злектрооптической керамике PLZT 7/65/35 с помощью двухлучевой лазерной интерферомет-рической системы. Когда небольшое постоянное напряжение подается на исходный образец материала, то образец будет изгибаться в направлении противоположном положительному направлению напряжения, что сопровождается неизмеримым аксиальным напряжением. Явление по-прежнему имеет место, если полярность приложенного напряжения изменяется. Когда прикладывается переменное напряжение, то колебания образца и направление механических смещений зависят от области частот приложенных напряжений. В частности, они изменяются, когда образец проходит через определнные механические резонансы.
    Notizen: Summary A new electromechanical-coupling phenomenon has been detected in the electro-optic ceramic PLZT7/65/35 with the aid of a dual-beam laser-interferometer system. Specifically, when a low-amplitude d.c. voltage is applied across a virgin specimen of the material, the specimen will deflect in the direction opposite to the positive direction of the voltage with no measurable accompanying axial strain. The observation remains valid when the polarity of the voltage is switched. When a.c. voltages are applied, the vibrational patterns and the sense of the mechanical displacements depend on the frequency ranges of the applied voltages. In particular, they change when the specimen goes through those specific mechanical resonances with nodal ringsonly, and not those with nodal ringsand nodal diameters.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 1145-1155 
    ISSN: 0392-6737
    Schlagwort(e): Acoustical properties of solids ; Ultrasonics, quantum acoustics and physical effects of sound ; Transduction, devices for the generation and reproduction of sound
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Beschreibung / Inhaltsverzeichnis: Riassunto Un sistema interferometrico laser a spostamento è stato adattato per misurare gli spostamenti meccanici di campioni di materiali piezoelettrici e ferroelettrici trascinati da campi elettrici ciclici. Si trova che possono esistere risonanze meccaniche di ampiezza abbastanza grande indipendentemente da qualsiasi apprezzabile disturbo elettrico. Le si riscontra anche in campioni vergini e depolarizzati di ceramiche ferroelettriche. Le prime prove sperimentali suggeriscono che questo fenomeno dipende nella struttura a domìni dei materiali ferroelettrici.
    Kurzfassung: Резюме Смещние лазерной интерферометрической системьи бьило приспособ-пено для измерения меанических смещений образцов пяезоэлектрических и ферроэлектрических материалов, вьизванньих циклическими электрическими полями. Обнаружено, что мэханические резонансьо с довольно большми амплитудами могут существоать независимо для любьих заметньих электрических возмушений. Эти резонансьи также обнаруженьи в образцах феррозлектрической кереники. Предварительньие экспериментальньие результатьи свипетельствуют, что это явление зависит от домэмами струкурьи ферроэлектричэскик матэроалпв.
    Notizen: Summary A displacement laser interferometer system has been adapted to measure the mechanical displacements of specimens of piezoelectric and ferroelectric materials driven by cyclic electric fields. It is found that mechanical resonances of quite large amplitudes can exist independent of any noticeable electrical disturbances. They are also detected in virgin and depoled specimens of ferroelectric ceramics. Preliminary experimental evidence suggests that this phenomenon depends on the domain structure of the ferroelectric materials.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Cellular and molecular life sciences 36 (1980), S. 183-185 
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The in vitro labeled RNAs in the accessory glands from male adults, and in the salivary glands and fat body from developing larvae ofDrosophila melanogaster were separated on linear gradient acrylamide gels in formamide. The patterns appear to be tissue- and stage-specific, and several lines of evidence indicate that the visualized radioactive bands include both hnRNA and messages.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Cellular and molecular life sciences 38 (1982), S. 1283-1292 
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Experiments designed to analyze the lethality and hybridogenesis in the European green frog complex have yielded the following results: 1. As a rule the inter-se cross ofRana esculenta is lethal, but several crosses have produced fully viable progeny. The frequency of such ‘break-through’ crosses appears to be related to parental population structure. 2. Parabiotic joining of lethal to viable embryos indicates that manifestation of the lethal effect is autonomous. There is, however, a 16–18% increase in the life span of the lethal partner. 3. Studies of LDH isozyme patterns revealed that thelessonae-specific alleles coding for the Ba and Bc subunits can be passed to the F1 progeny from a parental female or male of theesculenta phenotype. This demonstrates that there is no total elimination of thelessonae genome in theesculenta germ cells. 4. Immunologically, offspring from the inter-se cross ofR. esculenta show a closer relationship to theridibunda than to theesculenta phenotype. Variations of antigenic protein patterns suggest the possibility of chromosomal recombination betweenlessonae andridibunda in theesculenta hybrid. These results are confirmed by two-dimensional electrophoretic analysis of proteins in the oocytes of the three frog phenotypes.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Bulletin of environmental contamination and toxicology 26 (1981), S. 489-495 
    ISSN: 1432-0800
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Medizin
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Bulletin of environmental contamination and toxicology 25 (1980), S. 325-329 
    ISSN: 1432-0800
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Medizin
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 10
    Digitale Medien
    Digitale Medien
    Springer
    Flow, turbulence and combustion 41 (1984), S. 289-300 
    ISSN: 1573-1987
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract It is shown that many of the existing index profiling methods for optical fibre and preform are related to one another through the deflection function from which the index profile is reconstructed. These methods are classified into direct deflection function measurement, integral (or phase) measurement, and differential (or intensity) measurement. The deflection function from the integral method is obtained by measuring the phase distribution of the exit rays followed by numerical differentiation. Thus the reconstructed index profile has Gaussian noise. The deflection function from the differential method is obtained by measuring the light intensity distribution followed by a numerical integration. This process enhances low frequency noise but suppresses high frequency noise. The noise from direct method behaves in the similar manner as in the differential method except that it is less pronounced. Studies of the choice of methods for profiling of preform, multimode fibre and single mode fibre are also given.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...