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  • Polymer and Materials Science  (309)
  • GEOPHYSICS  (121)
  • Humans  (90)
  • Physics
  • 1990-1994  (520)
  • 1980-1984
  • 1993  (520)
Collection
Keywords
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  • 1990-1994  (520)
  • 1980-1984
Year
  • 1
    Electronic Resource
    Electronic Resource
    Metal ion concentrations in retrieved polyethylene total hip inserts and implications for artifactually high readings in tissue (1993)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 27 (1993), S. 1349-1355 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Although there are many studies which document high metal ion concentrations in clinically retrieved tissues surrounding total joint replacements, most investigations have remained cautious in their interpretation due to the artifactual influences of metal particulate.The possible contribution of polyethylene wear debris to artifactually high periprosthetic metal ion concentration readings has not been previously considered. This study documents the potential role of polyethylene particulate contamination in causing artifactually high metal concentration readings in tissues.The data showed metal ion contamination in the polyethylene was progressive at each stage of exposure to metal: from bar stock preparation, to manufacturing, to in vivo ambulation. The manufacturing and machining processes showed a statistically significant (P ≤ .05) increase in metal ion concentrations in the nonarticulated acetabular inserts over bar stock.The results of this study demonstrate that periprosthetic tissue and synovial fluid metal ion concentration data must be interpreted with caution due to possible artifactual problems associated with metal ion contaminated polyethylene particulate. © 1993 John Wiley & Sons, Inc.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820271102
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    Paper (German National Licenses)
    Fulltext
  • 2
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    The Koshak section: Evidence for element fractionation and an oxidation event at the K/T boundary (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-01-25
    Description: The Koshak site is a new K/T section located about 125 km EEN of the Fort Shevchenko city, Mangyshlak, Kazakhstan. In this paper, we report results of geochemical and mineralogical studies of this section which indicate a deep element fractionation and an oxidation event at the K/T boundary.
    Keywords: GEOPHYSICS
    Type: Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z; p 1051-1052
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Zonal mean winds in the equatorial mesosphere and lower thermosphere observed by the High Resolution Doppler Imager (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This paper presents analyses of mesospheric and lower thermospheric zonal mean winds observed by the High Resolution Doppler Imager (HRDI) on the Upper Atmosphere Research Satellite (UARS). Monthly averages of the equatorial zonal mean zonal winds are presented for January 1992 through June 1993. Equatorial zonal winds in the 70-90 km region are dominated by a semiannual oscillation (SAO), ranging from 30 m/s (westerly) to -100 m/s (easterly). At high latitudes the zonal wind variations are predominantly annual. Above 90 km, the low-latitude flow is easterly at all times, punctuated by a small semiannual variation. This behavior may be related to the deposition of momentum by the diurnal tides.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters (ISSN 0094-8276); 20; 24; p. 2849-2852
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    NASA TECHNICAL REPORTS
  • 4
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    Genotypic and phenotypic characterization of HIV-1 patients with primary infection (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-08-27
    Description: Better characterization of human immunodeficiency virus-type 1 (HIV-1) in patients with primary infection has important implications for the development of an acquired immunodeficiency syndrome (AIDS) vaccine because vaccine strategies should target viral isolates with the properties of transmitted viruses. In five HIV-1 seroconverters, the viral phenotype was found to be uniformly macrophage-tropic and non-syncytium-inducing. Furthermore, the viruses were genotypically homogeneous within each patient, but a common signature sequence was not discernible among transmitted viruses. In the two cases where the sexual partners were also studied, the sequences of the transmitted viruses matched best with minor variants in the blood of the transmitters. There was also a stronger pressure to conserve sequences in gp120 than in gp41, nef, and p17, suggesting that a selective mechanism is involved in transmission.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhu, T -- Mo, H -- Wang, N -- Nam, D S -- Cao, Y -- Koup, R A -- Ho, D D -- AI24030/AI/NIAID NIH HHS/ -- AI25541/AI/NIAID NIH HHS/ -- AI27742/AI/NIAID NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1993 Aug 27;261(5125):1179-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Aaron Diamond AIDS Research Center, New York University School of Medicine, NY 10016.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8356453" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Cell Line ; Female ; Gene Products, gag/chemistry/genetics ; Genes, Viral ; Genotype ; Giant Cells/physiology ; HIV Antigens/chemistry/genetics ; HIV Envelope Protein gp120/chemistry/*genetics ; HIV Envelope Protein gp41/chemistry/genetics ; HIV Infections/*microbiology/transmission ; HIV Seropositivity/microbiology ; HIV-1/chemistry/*genetics/*physiology ; Humans ; Macrophages ; Male ; Molecular Sequence Data ; Phenotype ; Sequence Alignment ; Sexual Partners ; *Viral Proteins ; Virus Replication ; gag Gene Products, Human Immunodeficiency Virus
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Effects of oral administration of type II collagen on rheumatoid arthritis (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-09-24
    Description: Rheumatoid arthritis is an inflammatory synovial disease thought to involve T cells reacting to an antigen within the joint. Type II collagen is the major protein in articular cartilage and is a potential autoantigen in this disease. Oral tolerization to autoantigens suppresses animal models of T cell-mediated autoimmune disease, including two models of rheumatoid arthritis. In this randomized, double-blind trial involving 60 patients with severe, active rheumatoid arthritis, a decrease in the number of swollen joints and tender joints occurred in subjects fed chicken type II collagen for 3 months but not in those that received a placebo. Four patients in the collagen group had complete remission of the disease. No side effects were evident. These data demonstrate clinical efficacy of an oral tolerization approach for rheumatoid arthritis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Trentham, D E -- Dynesius-Trentham, R A -- Orav, E J -- Combitchi, D -- Lorenzo, C -- Sewell, K L -- Hafler, D A -- Weiner, H L -- AG00294/AG/NIA NIH HHS/ -- MO1 RR01032/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1993 Sep 24;261(5129):1727-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Beth Israel Hospital, Boston, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8378772" target="_blank"〉PubMed〈/a〉
    Keywords: Administration, Oral ; Adult ; Aged ; Arthritis, Rheumatoid/*drug therapy/immunology ; Autoimmune Diseases/*drug therapy/immunology ; Collagen/*administration & dosage/adverse effects/therapeutic use ; Double-Blind Method ; Female ; Humans ; Immune Tolerance ; Male ; Middle Aged ; Placebo Effect ; T-Lymphocytes/immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    WT1-mediated growth suppression of Wilms tumor cells expressing a WT1 splicing variant (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-12-24
    Description: A human Wilms tumor cell line (RM1) was developed to test the tumor suppressor activity of WT1, a zinc finger transcription factor that is expressed in the developing human kidney and is mutationally inactivated in a subset of Wilms tumors. Transfection of each of four wild-type WT1 isoforms suppressed the growth of RM1 cells. The endogenous WT1 transcript in these cells was devoid of exon 2 sequences, a splicing alteration that was also detected in varying amounts in all Wilms tumors tested but not in normal kidney. Production of this abnormal transcript, which encodes a functionally altered protein, may represent a distinct mechanism for inactivating WT1 in Wilms tumors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haber, D A -- Park, S -- Maheswaran, S -- Englert, C -- Re, G G -- Hazen-Martin, D J -- Sens, D A -- Garvin, A J -- CA37887/CA/NCI NIH HHS/ -- CA58596/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1993 Dec 24;262(5142):2057-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Genetics, Massachusetts General Hospital Cancer Center, Boston 02129.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8266105" target="_blank"〉PubMed〈/a〉
    Keywords: Alternative Splicing ; Amino Acid Sequence ; Animals ; Base Sequence ; Cell Division/genetics ; DNA-Binding Proteins/biosynthesis/*genetics/physiology ; Genes, Wilms Tumor/genetics/*physiology ; Humans ; Mice ; Mice, Nude ; Molecular Sequence Data ; Neoplasm Transplantation ; RNA, Messenger/genetics ; Tumor Cells, Cultured ; WT1 Proteins ; Wilms Tumor/*genetics/*pathology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
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    Preferential migration of activated CD4+ and CD8+ T cells in response to MIP-1 alpha and MIP-1 beta (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-04-16
    Description: Recombinant human macrophage inflammatory protein-1 alpha (rhMIP-1 alpha) and rhMIP-1 beta were potent chemoattractants of human T lymphocytes. These rhMIP-1 cytokines attracted only T cells activated by monoclonal antibody to CD3 and did not attract unstimulated lymphocytes. Phenotypic analysis revealed that CD4+ T cells were capable of migrating in response to rhMIP-1 beta, whereas rhMIP-1 alpha induced chemotaxis of predominantly CD8+ T lymphocytes. Activated naive and memory T cells also migrated in response to rhMIP-1 cytokines. Furthermore, these cytokines enhanced the ability of T cells to bind to an endothelial cell monolayer. These results suggest that rhMIP-1 cytokines preferentially recruit specific T cell subsets during the evolution of the immune response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Taub, D D -- Conlon, K -- Lloyd, A R -- Oppenheim, J J -- Kelvin, D J -- N01-C0-74102/PHS HHS/ -- New York, N.Y. -- Science. 1993 Apr 16;260(5106):355-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Immunoregulation, National Cancer Institute, Frederick Cancer Research and Development Center (FCRDC), MD 21702.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7682337" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Antibodies, Monoclonal/immunology ; Antigens, CD3/immunology ; Antigens, CD8/analysis ; CD4-Positive T-Lymphocytes/immunology/*physiology ; Cell Adhesion ; Chemokine CCL4 ; Chemokine CCL5 ; *Chemotaxis, Leukocyte ; Clone Cells ; Cytokines/*pharmacology ; Endothelium, Vascular/cytology ; Humans ; Immunologic Memory ; *Lymphocyte Activation ; Lymphokines/pharmacology ; Macrophage Inflammatory Proteins ; Monokines/*pharmacology ; Recombinant Proteins/pharmacology ; T-Lymphocyte Subsets/immunology/physiology ; T-Lymphocytes, Cytotoxic/immunology/*physiology ; T-Lymphocytes, Regulatory/immunology/*physiology ; Umbilical Veins
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
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    Ar-39 - Ar-40 ages of acapulcoites and lodranites: Evidence for early parent body heating (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-01-25
    Description: New age dating of acapulcoites (Acapulco, Monument Draw) and lodranites (Gibson) allow us to reconstruct the history of their parent body in a chronological framework. These meteorites originated on a common parent body -4.55 Ga ago. Non-collisional heating caused partial melting, with lodranites having been heated slightly higher than acapulcoites. This parent body cooled to the Ar closure temperature at -4.51 Ga for acapulcoites and -4.48 Ga for lodranites. The difference in ages is consistent with the higher temperature and longer cooling time for lodranites. Cooling probably occurred at a few to tens of deg C/Ma, with slower cooling rates at lower temperatures.
    Keywords: GEOPHYSICS
    Type: Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F; p 141-142
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Observations of the quasi 2-day wave from the High Resolution Doppler Imager on UARS (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A strong westward traveling oscillation, with a period of 2 days and zonal wave number 3, is observed in the mesospheric and lower thermospheric winds from the High Resolution Doppler Imager (HRDI) on the Upper Atmosphere Research Satellite (UARS). The important events happen in January, July, and September/October, of which the occurrence in January is the strongest with an amplitude over 60 m/s. Detailed analyses for the periods of January 1992 and January 1993 reveal a cause-and-effect relationship in the wave developing process at 95 km. The global structures of the wave amplitude and phase are also presented.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters (ISSN 0094-8276); 20; 24; p. 2853-2856
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    NASA TECHNICAL REPORTS
  • 10
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    In situ observations of aerosol and chlorine monoxide after the 1991 eruption of Mount Pinatubo - Effect of reactions on sulfate aerosol (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Highly resolved aerosol size distributions measured from high-altitude aircraft can be used to describe the effect of the 1991 eruption of Mount Pinatubo on the stratospheric aerosol. In some air masses, aerosol mass mixing ratios increased by factors exceeding 100 and aerosol surface area concentrations increased by factors of 30 or more. Increases in aerosol surface area concentration were accompanied by increases in chlorine monoxide at mid-latitudes when confounding factors were controlled. This observation supports the assertion that reactions occurring on the aerosol can increase the fraction of stratospheric chlorine that occurs in ozone-destroying forms.
    Keywords: GEOPHYSICS
    Type: Science (ISSN 0036-8075); 261; 5125; p. 1140-1143.
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    NASA TECHNICAL REPORTS
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