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  • 1
    Electronic Resource
    Electronic Resource
    Collision-Induced Dissociation Studies of Co(CO)x+, x = 1-5: Sequential Bond Energies and the Heat of Formation of Co(CO)4 (1995)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 117 (1995), S. 6994-7002 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00131a023
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  • 2
    Electronic Resource
    Electronic Resource
    Thermochemistry of Transition Metal Benzene Complexes: Binding Energies of M(C6H6)x+ (x = 1, 2) for M = Ti to Cu (1995)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 117 (1995), S. 9740-9748 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00143a018
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  • 3
    Electronic Resource
    Electronic Resource
    Periodate Titration of Fe(II) in Acid Aqueous Solutions: An Environmentally Friendly Redox Reaction for the Undergraduate Laboratory (1997)
    Springer
    The chemical educator 2 (1997), S. 1-7 
    Details
    ISSN: 1430-4171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An environmentally friendly redox laboratory for the determination of Fe(II) in an acid aqueous medium is presented. This laboratory exercise is an appropriate substitute for the traditional dichromate titration, which is environmentally problematic. This titration method uses the periodate ion as the oxidizing agent and yields results which are as accurate as the dichromate titration. Student success rate in quantitative analysis is better than 80% in two separate laboratory-based trials. This method requires a fairly high degree of operator skill to yield good results, making this a viable laboratory exercise at the sophomore or junior level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00897970134a
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  • 4
    Electronic Resource
    Electronic Resource
    Polarity of Molecules: A New Approach for Freshman Chemistry (1997)
    Springer
    The chemical educator 2 (1997), S. 1-8 
    Details
    ISSN: 1430-4171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Polarity of molecules is one of the central concepts that is used for predicting or rationalizing a wide array of concepts in the undergraduate chemistry curriculum. These concepts include the physical properties of molecules at the freshman level, structure-reactivity relationships in organic and inorganic chemistry, and selection rules in spectroscopy. In all of the freshman chemistry textbooks that we examined, bond dipoles are assigned based on electronegativity differences, which are then added vectorially (sometimes implicitly) to obtain the net dipole moment for a given molecule. We have found that this approach, which relies on the students’ familiarity and comfort level with vector addition in three dimensions, works well only for a small fraction of our students. We present an alternative pedagogical method for conveying this important concept. This method does not invoke vector addition, relying instead on a simple, pictorial approach that is transparent to a majority of our students. This method applies not only to species with a clearly defined central atom but to substituted alkenes and substituted benzenes as well. In addition, it can also be extended to paramagnetic species, whose polarity is not generally discussed in most freshman chemistry textbooks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00897970160a
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  • 5
    Electronic Resource
    Electronic Resource
    The Dirac (Bracket) Notation in the Undergraduate Physical Chemistry Curriculum: A Pictorial Introduction (2000)
    Springer
    The chemical educator 5 (2000), S. 113-119 
    Details
    ISSN: 1430-4171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The Dirac (bracket) notation is ubiquitous in the chemical literature, but it is rarely introduced in the undergraduate chemistry curriculum. In this article we present a pictorial approach to the bracket notation that we have successfully used for the past three years in a junior-senior-level physical chemistry course. We have found that it requires roughly 75 minutes to introduce this topic, and, upon integration into subsequent discussions, it prepares our undergraduate students to routinely use this powerful tool in the study of chemical bonding and spectroscopy. We believe that this approach, when introduced after the traditional integral treatment, enhances student learning of the abstract subject of quantum mechanics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00897000379a
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  • 6
    Electronic Resource
    Electronic Resource
    Ligand Effects in Organometallic Thermochemistry: The Sequential Bond Energies of Ni(CO)x+ and Ni(N2)x+ (x = 1-4) and Ni(NO)x+ (x = 1-3) (1995)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 99 (1995), S. 7819-7828 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100019a072
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  • 7
    Electronic Resource
    Electronic Resource
    Radiofrequency Catheter Ablation of Atrioventricular Nodal Reentrant Tachycardia after Orthotopic Heart Transplantation (1999)
    Springer
    Journal of interventional cardiac electrophysiology 3 (1999), S. 283-285 
    Details
    ISSN: 1572-8595
    Keywords: heart transplantation ; radiofrequency ablation ; atrioventricular nodal reentrant tachycardia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Patients with orthotopic heart transplantation may develop a variety of arrhythmias. Successful radiofrequency catheter ablation for tachyarrhythmias from manifest and concealed accessory bypass tracts in transplant patients has been previously reported. We present a patient with orthotopic heart transplantation who developed typical atrioventricular nodal tachycardia, which was successfully treated by radiofrequency catheter ablation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009872330162
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  • 8
    Electronic Resource
    Electronic Resource
    Contraception potential of neem oil: Effect on pregnancy success in the mouse (1996)
    Springer
    Journal of assisted reproduction and genetics 13 (1996), S. 578-585 
    Details
    ISSN: 1573-7330
    Keywords: implantation sites ; preimplantation embryos ; fetuses ; uterus ; epidermal growth factor receptor ; leukocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Purpose: The aim of this study was to find out the role and mechanism of action of neem oil as a postcoital fertility blocker in mouse. Methods: Female mice were injected with neem oil (20 or 40 µl) surgically into each uterine horn on day 2 postcoitum (pc). Both the uterine horns of each mouse were injected. Arachis oil served as vehicle control. Pregnancy success was determined by the number of implanted embryos on day 8 pc and the number of live fetuses in the uteri on day 18 pc. Transforming growth factor-α (TGFα), epidermal growth factor (EGF), and epidermal growth factor receptor (EGFR) were immunolocalized in the paraffin-embedded sections of the uteri at 0600 hr on day 5 pc. The unimplanted embryos were assessed in the uteri at 2000 hr on day 5 pc. Uterine secretions were assessed for the leukocytes infiltration on day 4 through day 8 pc. Results: The number of implantation sites on day 8 pc and the number of live fetuses on day 18 pc were lower in the neem oil-treated animals compared to their respective control animals at both the concentrations of neem oil (20 and 40 µl/uterine horn). Neem oil also caused resorption of some embryos between day 8 pc and day 18 pc. In neem oil-treated mice, EGFR immunostaining decreased in the luminal and glandular epithelium and increased in the stroma as determined at 0600 hr on day 5 pc. Uterine secretions on day 4 through day 6 pc from the neem oil-treated mice showed massive leukocyte infiltration. Unimplanted preimplantation embryos, underdeveloped, degenerated, or at blastocyst stage, were recovered from the uteri after flushing at 2000 hr on day 5 pc from the neem oil-treated animals. A number of retrieved unimplanted embryos showed the direct attachment of the leukocytes to their zona pellucida. It is believed that the secretions of these leukocytes might be responsible for the underdevelopment of the early embryos and hence inhibition of implantation. The exact interaction of these leukocytes and their secretions with the early embryos is under investigation. Conclusions: Postcoital intrauterine treatment of neem oil during preimplantation period causes fertility block in mouse by lowering the EGFR localization in the luminal and glandular epithelium, by causing massive leukocytes infiltration into the uteri, by degenerating the early embryos, and by causing the postimplantation embryonic resorptions in the uteri. The possible mechanism of action of neem oil is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02066612
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  • 9
    Electronic Resource
    Electronic Resource
    Intracardiac Echocardiographic Imaging of Right Atrial Appendage: Mass vs. Pectinate Muscle (1998)
    Springer
    Journal of interventional cardiac electrophysiology 2 (1998), S. 247-248 
    Details
    ISSN: 1572-8595
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009780802879
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  • 10
    Electronic Resource
    Electronic Resource
    A Model for diffusion controlled bioavailability of crude oil components (1997)
    Springer
    Biodegradation 8 (1997), S. 287-296 
    Details
    ISSN: 1572-9729
    Keywords: asphaltene ; bioavailability ; biodegradation ; crude oil ; diffusivity ; modeling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Crude oil is a complex mixture ofseveral different structural classes of compoundsincluding alkanes, aromatics, heterocyclic polarcompounds, and asphaltenes. The rate and extent ofmicrobial degradation of crude oil depends on theinteraction between the physical and biochemicalproperties of the biodegradable compounds and theirinteractions with the non-biodegradable fraction. Inthis study we have systematically altered theconcentration of non-biodegradable material in thecrude oil and analyzed its impact on transport of thebiodegradable components of crude oil to themicroorganisms. We have also developed a mathematicalmodel that explains and accounts for the dependence ofbiodegradation of crude oil through a putativebioavailability parameter. Experimental resultsindicate that as the asphaltene concentration in oilincreases, the maximum oxygen uptake in respirometersdecreases. The mathematically fitted bioavailabilityparameter of degradable components of oil alsodecreases as the asphaltene concentration increases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008293024768
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