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  • 1
    Electronic Resource
    Electronic Resource
    Quinone photoreduction. I. Mathematical model (1969)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 73 (1969), S. 3240-3244 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100844a013
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Quinone photoreduction. II. Mechanism of photoreduction of 9,10-phenanthrenequinone and 2-tert-butyl-9,10-anthraquinone in ethanol (1969)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 73 (1969), S. 3245-3249 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100844a014
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  • 3
    Electronic Resource
    Electronic Resource
    Perchloric Acid Catalyzed Aromatic Mercuration in Acetic Acid Solution. II. The Substitution Process (1967)
    s.l. : American Chemical Society
    The @journal of organic chemistry 32 (1967), S. 752-755 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo01278a603
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Heat transfer to a subliming solid-vapor mixture of hydrogen below its triple point (1966)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 12 (1966), S. 790-795 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Heat transfer coefficients have been measured over a range of Reynolds numbers for a solid-vapor mixture of parahydrogen discharging through a heated brass tube below the triple point pressure. A correlation is given which is shown by a formal analysis of a simple model to account for most of the system variables.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690120429
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  • 5
    Electronic Resource
    Electronic Resource
    Correlation of vulcanizate properties with polymer-black interaction (1965)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 9 (1965), S. 2749-2762 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The specific surface activity of carbon black, as indicated by amount of rubber bound to the black during the mixing process, has been found to be the major factor in determining the modulus of the vulcanizate at high extensions. However, modulus at low extension is independent of specific surface activity and mostly influenced by other black characteristics, such as “structure” and surface area. Further, a relationship of the Guth-Gold type based upon elastic theory was applied for predicting modulus of filled vulcanizates at high extension from that of an identically cured gum vulcanizate. The relationship is \documentclass{article}\pagestyle{empty}\begin{document}$M = M_0 (1 + 2.5\Phi + 14.1\Phi^2)$\end{document} where Φ is the reinforcement volume or volume fraction of filler plus volume fraction of bound polymer. This relationship was also used to calculate the actual elongation in a filled vulcanizate to compensate for that portion that does not elongate at all, and this actual extension ratio (α') was utilized in the Mooney-Rivlin equation. The Mooney-Rivlin equation is the theoretical expression for the modulus of a vulcanizate as it changes with elongation and cure level (or number of effective chains per unit volume). The equation has been successfully used previously for gum vulcanizates, but not for filled vulcanizates. With the use of the corrected elongation (α'), experiment and theory are in much better agreement than previously, and a general concept of the influence of black upon vulcanizate properties can be postulated.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1965.070090810
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  • 6
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    Long-Term Survival After Aortic Valve Replacement Among High-Risk Elderly Patients in the United States: Insights From the Society of Thoracic Surgeons Adult Cardiac Surgery Database, 1991 to 2007 [Valvular Heart Disease] (2012)
    American Heart Association (AHA)
    Details
    Publication Date: 2012-09-25
    Description: Background— Surgical aortic valve replacement (AVR) remains the standard of care for the treatment of operable, symptomatic aortic valve disease; however, to date, there are limited national data on the contemporary long-term outcomes after AVR in older individuals. Methods and Results— We examined long-term survival among 145 911 AVR patients ≥65 years of age undergoing AVR at 1026 centers with participation in the Society of Thoracic Surgeons Adult Cardiac Surgery Database from 1991 to 2007. In-hospital complications and long-term survival were stratified by age, Society of Thoracic Surgeons perioperative risk of mortality, and several comorbidities. The median patient age was 76 years; 16% had chronic lung disease, 6% had preoperative renal failure, 38% had heart failure, and 12% had prior cardiac surgery. The median survival in patients 65 to 69, 70 to 79, and ≥80 years of age undergoing isolated AVR was 13, 9, and 6 years, respectively. For AVR plus coronary artery bypass graft procedures, median survival was 10, 8, and 6 years, respectively. Although only 5% of isolated AVR patients had a high Society of Thoracic Surgeons perioperative risk of mortality (≥10%), their median survival was 2.5 to 2.7 years. Severe lung disease and renal failure were each associated with a ≥50% reduction in median survival among all age groups compared with those who did not have these comorbidities, whereas left ventricular dysfunction and prior cardiac operation were associated with a 25% reduction in median survival. Conclusion— Long-term survival after surgical AVR in the elderly is excellent, although patients with a high Society of Thoracic Surgeons perioperative risk of mortality and those with certain comorbidities carry a particularly poor long-term prognosis.
    Keywords: Health policy and outcome research, Valvular heart disease
    Electronic ISSN: 1524-4539
    Topics: Medicine
    Published by American Heart Association (AHA)
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  • 7
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    Long-Term Safety and Effectiveness of Mechanical Versus Biologic Aortic Valve Prostheses in Older Patients: Results From the Society of Thoracic Surgeons Adult Cardiac Surgery National Database [Health Services and Outcomes Research] (2013)
    American Heart Association (AHA)
    Details
    Publication Date: 2013-04-23
    Description: Background— There is a paucity of long-term data comparing biological versus mechanical aortic valve prostheses in older individuals. Methods and Results— We performed follow-up of patients aged 65 to 80 years undergoing aortic valve replacement with a biological (n=24 410) or mechanical (n=14 789) prosthesis from 1991 to 1999 at 605 centers within the Society of Thoracic Surgeons Adult Cardiac Surgery Database using Medicare inpatient claims (mean, 12.6 years; maximum, 17 years; minimum, 8 years), and outcomes were compared by propensity methods. Among Medicare-linked patients undergoing aortic valve replacement (mean age, 73 years), both reoperation (4.0%) and endocarditis (1.9%) were uncommon to 12 years; however, the risk for other adverse outcomes was high, including death (66.5%), stroke (14.1%), and bleeding (17.9%). Compared with those receiving a mechanical valve, patients given a bioprosthesis had a similar adjusted risk for death (hazard ratio, 1.04; 95% confidence interval, 1.01–1.07), higher risks for reoperation (hazard ratio, 2.55; 95% confidence interval, 2.14–3.03) and endocarditis (hazard ratio, 1.60; 95% confidence interval, 1.31–1.94), and lower risks for stroke (hazard ratio, 0.87; 95% confidence interval, 0.82–0.93) and bleeding (hazard ratio, 0.66; 95% confidence interval, 0.62–0.70). Although these results were generally consistent among patient subgroups, bioprosthesis patients aged 65 to 69 years had a substantially elevated 12-year absolute risk of reoperation (10.5%). Conclusions— Among patients undergoing aortic valve replacement, long-term mortality rates were similar for those who received bioprosthetic versus mechanical valves. Bioprostheses were associated with a higher long-term risk of reoperation and endocarditis but a lower risk of stroke and hemorrhage. These risks varied as a function of a patient’s age and comorbidities.
    Keywords: Health policy and outcome research
    Electronic ISSN: 1524-4539
    Topics: Medicine
    Published by American Heart Association (AHA)
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  • 8
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    Practice Patterns and Clinical Outcomes After Hybrid Coronary Revascularization in the United States: An Analysis From the Society of Thoracic Surgeons Adult Cardiac Database [Cardiovascular Surgery] (2014)
    American Heart Association (AHA)
    Details
    Publication Date: 2014-09-10
    Description: Background— Hybrid coronary revascularization (HCR) involves a combination of surgical and percutaneous techniques, which in selected patients may present an alternative to conventional coronary artery bypass grafting (CABG). Methods and Results— Patients were included who underwent HCR (staged/concurrent) or isolated CABG in the Society of Thoracic Surgeons Adult Cardiac Surgery Database (July 2011 to March 2013). HCR represented 0.48% (n=950; staged=809, concurrent=141) of the total CABG volume (n=198 622) during the study period, and was performed in one-third of participating centers (n=361). Patients who underwent HCR had higher cardiovascular risk profiles in comparison with patients undergoing CABG. In comparison with CABG, median sternotomy (98.5% for CABG, 61.1% for staged HCR, and 52.5% for concurrent HCR), direct vision harvesting (98.9%, 66.0%, and 68.1%) and cardiopulmonary bypass (83.4%, 45%, and 36.9%) were less frequently used for staged and concurrent HCR, whereas robotic assistance (0.7%, 33.0%, and 30.5%) was more common. After adjustment, no differences were observed for the composite of in-hospital mortality and major morbidity (odds ratio, 0.93; 95% confidence interval, 0.75–1.16; P =0.53 for staged HCR, and odds ratio, 0.94; 95% confidence interval, 0.56–1.56; P =0.80 for concurrent HCR in comparison with CABG). There was no statistically significant association between operative mortality and either treatment group (odds ratio, 0.74; 95% confidence interval, 0.42–1.30; P =0.29 for staged HCR, and odds ratio, 2.26; 95% confidence interval, 0.99–5.17; P =0.053 for concurrent HCR in comparison with CABG). Conclusion— HCR, either as a staged or concurrent procedure, is performed in one-third of US hospitals and is reserved for a highly selected patient population. Although HCR may appear to be an equally safe alternative for CABG surgery, further randomized study is warranted.
    Keywords: Catheter-based coronary interventions: stents, CV surgery: coronary artery disease
    Electronic ISSN: 1524-4539
    Topics: Medicine
    Published by American Heart Association (AHA)
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  • 9
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    Effect of Race and Ethnicity on Outcomes With Drug-Eluting and Bare Metal Stents: Results in 423 965 Patients in the Linked National Cardiovascular Data Registry and Centers for Medicare & Medicaid Services Payer Databases [Health Services and Outcom (2013)
    American Heart Association (AHA)
    Details
    Publication Date: 2013-04-02
    Description: Background— Black, Hispanic, and Asian patients have been underrepresented in percutaneous coronary intervention clinical trials; therefore, there are limited data available on outcomes for these race/ethnicity groups. Methods and Results— We examined outcomes in 423 965 patients in the National Cardiovascular Data Registry CathPCI Registry database linked to Medicare claims for follow-up. Within each race/ethnicity group, we examined trends in drug-eluting stent (DES) use, 30-month outcomes, and relative outcomes of DES versus bare metal stents. Overall, 390 351 white, 20 191 black, 9342 Hispanic, and 4171 Asian patients 〉 65 years of age underwent stent implantation from 2004 through 2008 at 940 National Cardiovascular Data Registry participating sites. Trends in adoption of DES were similar across all groups. Relative to whites, black and Hispanic patients undergoing percutaneous coronary intervention had higher long-term risks of death and myocardial infarction (blacks: hazard ratio, 1.28; 95% confidence interval, 1.24–1.32; Hispanics: hazard ratio, 1.15; 95% confidence interval, 1.10–1.21). Long-term outcomes were similar in Asians and whites (hazard ratio, 0.99; 95% confidence interval, 0.92–1.08). Use of DES was associated with better 30-month survival and lower myocardial infarction rates compared with the use of bare metal stents among all race/ethnicity groups except Hispanics, who had similar outcomes with DES or bare metal stents. Conclusions— Black and Hispanic patients undergoing percutaneous coronary intervention had worse long-term outcomes relative to white and Asian patients. Compared with bare metal stent use, DES use was generally associated with superior long-term outcomes in all racial and ethnic groups, although these differences were not statistically significant in Hispanic patients.
    Electronic ISSN: 1524-4539
    Topics: Medicine
    Published by American Heart Association (AHA)
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  • 10
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    ARID1a-DNA Interactions Are Required for Promoter Occupancy by SWI/SNF [Articles] (2012)
    The American Society for Microbiology (ASM)
    Details
    Publication Date: 2012-12-22
    Description: Every known SWI/SNF chromatin-remodeling complex incorporates an ARID DNA binding domain-containing subunit. Despite being a ubiquitous component of the complex, physiological roles for this domain remain undefined. Here, we show that disruption of ARID1a-DNA binding in mice results in embryonic lethality, with mutant embryos manifesting prominent defects in the heart and extraembryonic vasculature. The DNA binding-defective mutant ARID1a subunit is stably expressed and capable of assembling into a SWI/SNF complex with core catalytic properties, but nucleosome substrate binding and promoter occupancy by ARID1a-containing SWI/SNF complexes (BAF-A) are impaired. Depletion of ARID domain-dependent, BAF-A associations at THROMBOSPONDIN 1 ( THBS1 ) led to the concomitant upregulation of this SWI/SNF target gene. Using a THBS1 promoter-reporter gene, we further show that BAF-A directly regulates THBS1 promoter activity in an ARID domain-dependent manner. Our data not only demonstrate that ARID1a-DNA interactions are physiologically relevant in higher eukaryotes but also indicate that these interactions facilitate SWI/SNF binding to target sites in vivo . These findings support the model wherein cooperative interactions among intrinsic subunit-chromatin interaction domains and sequence-specific transcription factors drive SWI/SNF recruitment.
    Print ISSN: 0270-7306
    Electronic ISSN: 1098-5549
    Topics: Biology , Medicine
    Published by The American Society for Microbiology (ASM)
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