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  • 1
    Electronic Resource
    Electronic Resource
    Changing Jobs and Changing Houses: Mobility Outcomes of Employment Transitions (1999)
    Boston, USA and Oxford, UK : Blackwell Publishers Inc
    Journal of regional science 39 (1999), S. 0 
    Details
    ISSN: 1467-9787
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: The life-course approach to residential mobility and migration recognizes a central role for a variety of demographic and economic triggers in the mobility process. Having a child, getting married, separated, or divorced, have all been identified as triggers that generate residential relocations. It is obvious that a job change can also be viewed as a stimulus for residential relocation, although until now the interconnection has been evaluated mainly for long-distance migratory moves rather than for its effects on residential mobility. In this analysis we use the Panel Study of Income Dynamics to test the association between employment changes and residential relocation. We examine both the occurrence and the timing of residential moves triggered by employment transitions. We show that job changes increase the likelihood of residential relocation in the aggregate and for singles when we hold other & “triggers” constant. The results of the analysis of the timing of job changes and residential relocations indicate that temporal differences exist between households types. Overall, the results establish that job change is an important triggering process in residential relocation and emphasizes the interconnected nature of life-course events.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/0022-4146.00154
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  • 2
    Electronic Resource
    Electronic Resource
    Mechanical and Neurohumoral Regulation of Adult Cardiocyte Growth (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 752 (1995), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1995.tb17420.x
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  • 3
    Electronic Resource
    Electronic Resource
    Missed fractures on emergency room ankle radiographs: An analysis of 433 patients (1997)
    Springer
    Emergency radiology 4 (1997), S. 295-302 
    Details
    ISSN: 1438-1435
    Keywords: Emergency medicine, methods ; Fractures, diagnosis ; Ankle joint, radiography ; Foot, radiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The purpose of this study was to review fractures and radiographic abnormalities that are detectable, but often overlooked, on a standard ankle radiographic series. We carried out a retrospective review of 556 consecutive ankle radiographic series obtained between June 1, 1995, and May 31, 1996. From this population, 433 complete ankle radiographic series on patients with suspected trauma were selected. The original radiologist's interpretation was compared to a twostep “gold standard” interpretation, consisting of reinterpretation by a musculoskeletal radiologist with the patient's medical and imaging records at hand, with review of discrepant cases by a consensus panel. Eighteen studies were incorrectly interpreted at the initial reading, yielding an overall error rate of 4.2%. Fifteen of the errors were missed fractures, ankle syndesmotic widening, or incorrect classification of old fractures as acute. The rate for this type of error was 3.5%. The most commonly missed fractures were of the talus (4 patients), followed by fracture of the base of the fifth metatarsal and calcaneal stress fracture (2 cases each); tibiofibular syndesmotic injury was missed in 2 cases. Missed fractures on ankle radiographs most commonly involved bones of the hindfoot, especially the talus. It is important to recognize these uncommon and easily missed fractures, so that a modified search pattern may result in improved accuracy of radiographic interpretation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01461736
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  • 4
    Electronic Resource
    Electronic Resource
    Subcellular compartmentalization of myosin isoforms in embryonic chick heart ventricle myocytes during cytokinesis (1991)
    New York, NY : Wiley-Blackwell
    Cell Motility and the Cytoskeleton 19 (1991), S. 189-206 
    Details
    ISSN: 0886-1544
    Keywords: monoclonal anticytoplasmic myosin antibodies ; cardiomyocyte cell division ; cleavage furrows ; myosin localization ; myosin mobilization ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Embryonic chick heart ventricle myocytes retain the ability to alternate between proliferation and functional differentiation. A cytoplasmic isoform of myosin is present in cleavage furrows of various nonmuscle cells during cytokinesis, whereas one or more of the cardiac myosin isoforms are localized in sarcomeres of beating cardiomyocytes. Antibodies were employed to reveal the subcellular localizations of cytoplasmic and cardiac myosin isoforms in embryonic chick ventricle cardiomyocytes during cytokinesis. Monoclonal anticytoplasmic myosin antibodies were prepared against myosin purified from brains of 1-day posthatched chickens and shown to react with chick brain myosin heavy chain by Western blots and/or ELISA tests. One monoclonal antibrain myosin antibody also cross-reacted with chick cardiac myosin but not with skeletal or smooth muscle myosins. Two antichick cardiac myosin monoclonal antibodies and one antichick skeletal myosin polyclonal antibody that cross-reacts with cardiac myosin were employed to identify cardiac sarcomeric myosin.Cells were isolated from day 8 embryonic chick heart ventricles, enriched for myocytes, grown in vitro for 3 days, and then examined by immunofluorescence techniques. Monoclonal antibodies against cytoplasmic myosin preferentially localized in the cleavage furrows of both cardiofibroblasts and cardiomyocytes in all stages of cytokinesis. In contrast, antibodies that recognize cardiac myosin were distributed throughout cardiomyocytes during early stages of cytokinesis, but became progressively excluded from the furrow area during middle and late stages of cytokinesis. These data suggest that in cells that contain both cytoplasmic and sarcomeric myosin isoforms, only cytoplasmic myosin isoforms are mobilized to form the contractile ring for cytokinesis.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cm.970190307
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  • 5
    Electronic Resource
    Electronic Resource
    Immigration, education, and the future of the california workforce (2000)
    Springer
    Population and environment 21 (2000), S. 295-314 
    Details
    ISSN: 1573-7810
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Sociology
    Notes: Abstract In the decades after the second world war, California's highly educated workforce was a central part of the booming California economy, especially in the 1950s and 1960s when large numbers of migrants arrived from the Middle West and the East Coast. Now in the last decade of the twentieth century there is evidence that California's educational advantage may be shifting. The overall levels of education in California's workforce are decreasing relatively, with real implications for the future human capital of California. The data show lower education levels in California and a reversal of previous patterns when California's workforce was more educated than the nation as a whole. The implications for the future of California as a cutting edge economy are less clear, but it is possible that increasingly, California will be competing with other states for the fast-growing and well-paying jobs in the high technology sector. The future of the California workforce will be closely bound up with the education of the immigrant stock already in California and with the continuing flows from Mexico and Central America.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02436133
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  • 6
    Electronic Resource
    Electronic Resource
    Replacement perfusion of cultured eucaryotic cells: A method for the accurate measurement of the rates of growth, protein synthesis, and protein turnover (1984)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 26 (1984), S. 47-64 
    Details
    ISSN: 0730-2312
    Keywords: cellular growth ; protein synthesis ; protein turnover ; lysosomes ; proteolysis ; myeloma ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: The fractional rates of protein synthesis (ks) and degradation (kp) were studied in the myeloma cell line SP2/0-AG14 grown at different rates (kg). Cells in spinner flask suspension cultures were maintained at constant cellular density for prolonged periods by replacement perfusion of labeling medium at a rate equivalent to the rate of growth. Total protein synthesis was calculated from the specific-radioactivity of labeled L-leucine in the precursor (medium) and cellular protein. Fractional synthesis rates determined by approach to equilibrium labeling were the same as those determined by equilibrium-pulse labeling kinetics and pulse-chase kinetics. The rate of protein degradation was determined from the established relationship kg = ks - kp. Protein synthesis rates remained constant over a threefold range in the rate of cell growth. At relatively slow growth rates (kg = 0.017/hr) turnover represented a major fraction of total synthesis (kp = 0.032/hr = 0.65ks). At rapid growth rates (kg = 0.058/hr) the value of kp was less than 0.005/hr. No major difference was observed between the ks determined for individual cellular proteins (separated by SDS-polyacrylamide (7.5%) gel electro-phoresis) from rapid- and slow-growing cultures. Thus, with an invariable ks, any change in growth rate is due to an inverse change in the rate of turnover. Since turnover is the balance between synthesis and degradation and since synthesis is unchanging then changes in the growth rate of SP2/0-AG14 should be due to changes in the rate of protein degradation. Experiments were therefore performed to determine the origin of the degradative machinery, ie, cytosolic or lysosomal; autolysis of prelabeled cellular protein (in vitro) was observed only at acidic pH (4.2) and WUS totally inhibited by addition of lcupcptin (10 μM) and pepstatin (2 μM), the specific inhibitors of lysosomal cathepsins B (L) and D, respectively. Since growth rate appears to be regulated by the alterations in the rate of protein degradation and degradation (in vitro) in SP2/0-AG14 appearsto be lysosomal, then one should be able to alter the rate of cellular growth by interfering with rate of lysosomal proteolysis. Indeed, when the lysosomotropic amine NH 4Cl (10 mM) is added to cells growing with a kg of 0.018/hr ± 0.001 (ks = 0.050/hr ± 0.002) the growth rate increased to 0.051/hr ± 0.002 without change in the rate of protein synthesis (ks = 0.049/hr ± 0.003). It is suggested from our data that the cellular growth rate of SP2/0-AG14 is regulated by the lysosomal apparatus; whether this regulation is itself regulated by either a specific compartmentalization of the lysosomal proteinases and/or their substrates or by endogenous protease inhibitors, should prove to be an exciting area for future investigation.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240260105
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