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  • 2000-2004  (10)
  • 1970-1974  (6)
  • 1
    Electronic Resource
    Electronic Resource
    Structure and discrimination in chiral fluids: A molecular dynamics and integral equation study (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 113 (2000), S. 2369-2384 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: An analysis of structure and discrimination in simple chiral fluids is presented. The chiral molecules consist of a central carbon bonded to four distinct groups. Molecular-dynamics simulations have been performed on a one-component chiral fluid and on two racemic mixtures. For the racemates, discrimination, as measured by differences in pair distribution functions, is present but found to be small. Intermolecular pair interaction energies are found to be good predictors of the magnitude and the sign (mirror-image pairs favored) of the differences observed in site–site distribution functions. For the one-component fluid, the quality of structural predictions from the reference-interaction-site method and Chandler–Silbey–Ladanyi (CSL) integral equation theories, with the hypernetted chain (HNC) and Percus–Yevick closures, has been examined. These theories generally provide a qualitatively correct description of the site–site distributions. Extensions beyond the HNC level have been explored: Two-field-point bridge diagrams have been explicitly evaluated and included in the CSL theory. The inclusion of these diagrams significantly improves the quality of the integral equation theories. Since the CSL theory has not been used extensively, and bridge diagrams have been evaluated in only a few instances, a detailed analysis of their impact is presented. For racemic mixtures, diagram evaluation is shown to be crucial. Specifically, the differences in site–site distributions for sites on identical and mirror-image molecules are found to originate from bridge diagrams which involve interactions between four-site, or larger, clusters. Discrimination cannot be predicted from an integral equation theory which neglects these diagrams. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.482052
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  • 2
    Electronic Resource
    Electronic Resource
    Satake diagrams and Iwasawa decomposition of twisted Kac–Moody algebras (2000)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 41 (2000), S. 7817-7831 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: The involutive automorphism of twisted Kac–Moody algebras of A2(2) and D4(3) are computed from the Satake diagrams of these algebras, which are then used to furnish a general procedure of their Iwasawa decomposition. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1288244
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  • 3
    Electronic Resource
    Electronic Resource
    Naphthothiophenes. 1. .alpha.-(Alkylaminomethyl)-4-naphtho[2,1-b]thiophenemethanols as antimalarials (1972)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 15 (1972), S. 370-374 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00274a010
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  • 4
    Electronic Resource
    Electronic Resource
    An improved automated anodization apparatus for fabricating nanostructure devices and porous silicon (2001)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 72 (2001), S. 275-277 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: This note describes an improved anodization apparatus that provides enhanced safety and efficiency, and is suitable for large-scale volume production. The improved anodization apparatus also provides increased electrolyte temperature control, and allows flexibility in the size and shape of the substrate. Overall, this equipment will find wide applications in the fabrication of template-based semiconductor nanostructures, porous silicon, and other devices that require electrochemical processing. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1326924
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  • 5
    Electronic Resource
    Electronic Resource
    Magnetic, structural, and transport properties of thin film and single crystal Co2MnSi (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 4396-4398 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic, structural, and transport properties of the Heusler alloy Co2MnSi are reported for sputtered thin films and a single crystal. X-ray diffraction reveals a phase pure L21 structure for all films grown between 573 and 773 K. Films grown at 773 K display a four-fold decrease in the resistivity relative to those grown at lower temperatures and a corresponding 30% increase in the residual resistivity ratio (ρ300 K/ρ5 K). We show that the higher growth temperature results in lattice constants, room temperature resistivities, and magnetic properties that are comparable to that of the bulk single crystal. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1428625
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  • 6
    Electronic Resource
    Electronic Resource
    Acute toxicity of ammonia and its sub-lethal effects on selected haematological and enzymatic parameters of mrigal, Cirrhinus mrigala (Hamilton) (2004)
    Oxford, UK : Blackwell Science Ltd
    Aquaculture research 35 (2004), S. 0 
    Details
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A comprehensive acute toxicity trial was conducted using a static water system to study the toxic effect of ammonia on haematology and enzyme profiles of Cirrhinus mrigala H. The LC50 of total ammonia-nitrogen (TAN) was 11.8 mg L−1 TAN (1.029 mg L−1 NH3-N). The sub-lethal test revealed that with increasing concentration of TAN, the total erythrocyte counts were reduced in lower concentrations (1–4 mg L−1 TAN) followed by higher levels in fish exposed to higher concentrations (8–16 mg L−1 TAN). In contrast, the total leucocyte counts were opposite. With increasing concentration of TAN, haemoglobin and serum protein content were reduced, whereas the blood glucose level increased. As the concentration of ammonia increased, there was a reduction in acetylecholinesterase activity in the brain and liver; alkaline phosphatase activity in the serum, brain and gill; and acid phosphatase (ACP) activity in the gill. The activity of lactate dehydrogenase in the gill, liver, kidney and brain increased with increased concentration of ammonia. In addition, activities of ACP in the serum and brain, alanine aminotransferase in the serum, brain and gill, and aspartate aminotransferase in the serum, brain and gill were increased.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2109.2004.00994.x
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  • 7
    Electronic Resource
    Electronic Resource
    Killing of cutaneous microbial species by photodynamic therapy (2001)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 144 (2001), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background Photodynamic therapy (PDT) utilizes photosensitizers and light. Whereas PDT use in cancer treatment has been widely accepted, antimicrobial PDT (APDT) is still in its early stages of development. Objectives To study microbial killing in vitro using APDT. Methods We used a combination of methylene blue and visible light, and a range of microbial species representative of those encountered on the skin in health and disease. Using standard light intensity conditions (slide projector, 25 cm distance from target, 42 mW cm−2) and methylene blue dye at 100 µg mL−1, kill rates and subsequent D-values were determined against Staphylococcus aureus, S. epidermidis, Streptococcus pyogenes, Corynebacterium minutissimum, Propionibacterium acnes and Candida albicans. Results D-values for these species were 72, 66, 48, 120, 30 and 660 s, respectively. The effects of light intensity on the killing of S. epidermidis showed the kill rate to be proportional to the light intensity. A high rate of cell kill was also obtained using natural sunlight. Conclusions Overall, these results indicate that APDT of the skin may represent a useful alternative to conventional antimicrobial treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2133.2001.04013.x
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  • 8
    Electronic Resource
    Electronic Resource
    Evaporation and solution morphologies of ZnO single crystals (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 379-383 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The evaporation and solution morphologies of ZnO single crystals have been investigated. In the case of solution etching, using HCl, the {00.1} surface develops etch pits with sharp rims while for the {00.\overline 1} surface, etch-pit rims are unstable. Similar effects are found for evaporation near 1035°C. As the evaporation temperature is increased to near 1200°C, however, the {00.\overline 1} surface becomes increasingly complex before assuming a more stable habit at still higher temperatures. Both {10.\overline 2} and {11.\overline 2} planes are developed on the {00.\overline 1} surface, but the corresponding planes on the {00.1} surface are not observed. (The development of second order pyramidal planes is also observed in vapor grown needles from ore-processing furnaces).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889871007246
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  • 9
    Electronic Resource
    Electronic Resource
    131I-RIHSA CSF scanning in pediatric neurosurgical practice (1974)
    Springer
    Neuroradiology 8 (1974), S. 119-123 
    Details
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs ont étudié 60 cas de cisternographies à la RISA avec/ou ventriculographies chez des enfants âgés de un mois à 15 ans, atteints de différents troubles de la circulation du LCR. Cette étude comprenait des cas d'hydrocéphalie et d'autres malformations congénitales du système nerveux central ainsi que des séquelles post-traumatiques et post-méningitiques. L'examen se révéla fiable, non seulement dans la différenciation entre hydrocéphalie compensée ou progressive mais également dans la détection d'anomalies associées de la circulation de LCR en cas de méningo-myélocèles d'encéphalocèles. Cette technique est excellente pour la localisation d'une fistule de LCR; elle peut également visualiser la taille et l'extension d'un hématome sous-dural ou d'un hydrome. La concentration pathologique et l'élimination tardive du radio-élément dans la région sous-jacente à la lacune crânienne étaient constantes dans tous les cas de lacunes post-traumatiques. Des blocages uniques ou multiples furent observés dans des cas de séquelles postméningitiques (tuberculose).
    Abstract: Zusammenfassung Bei 60 Kindern im Alter swischen 1 Monat und 15 Jahren wurde die RIHSA-Cisternographie und/oder Ventrikulographie durchgeführt. Es sollten damit unterschiedliche Hydrocephalus-Formen und andere angeborene Mißbildungen des Zentralnervensystems, auch posttraumatische und postmeningitische Veränderungen nachgewiesen werden. Diese Untersuchungsmethode zeigt sich besonders wertvoll zur Differenzierung der einzelnen Hydrocephalus-Arten zum Nachweis von Anomalien der Liquorzirkulation, besonders bei Meningomyelozelen und Encephalozelen. Auch können Liquorfisteln und subdurale Hämatome oder Hygrome damit exakt festgestellt werden. Pathologische Veränderungen finden sich auch bei allen Patienten mit wachsenden Frakturen. Bei postmeningitischen (tuberkulösen) Verklebungen konnte der Stopp lokalisiert werden.
    Notes: Summary Sixty children aged between one month and fifteen years were submitted to RIHSA cisternography and/or ventriculography for a variety of lesions affecting the CSF pathways. These included cases of hydrocephalus and other congenital malformations of the central nervous system, posttraumatic and post meningitic sequelae. The investigation has been found to be valuable not only in differentiating between arrested and progressive hydrocephalus but also in unmasking associated anomalies of CSF flow and pathways in cases of meningomyelocele and encephalocele. It is excellent for delineating a CSF fistula and can also be utilised to demonstrate the size and extent of a subdural hematoma or hygroma. Pathological concentration and delayed clearance of the isotope in the region underlying the skull defect was a consistent finding in all cases of growing fracture (craniocerebral erosion). Single or multiple sites of blocks were observed in cases of postmeningitic (tuberculous) sequelae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00345044
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  • 10
    Electronic Resource
    Electronic Resource
    High prevalence of Haemoglobin E in two populations in Assam (1971)
    Springer
    Human genetics 〈Berlin〉 12 (1971), S. 264-266 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Zwei Bevölkerungsgruppen in Assam (Indien) wurden untersucht. Bei 80 Khasi (Bhoi-Untergruppe), einem austroasiatischen Stamm, fanden sich 41% HbE-Träger, bei 82 Ahom, Abkömmlingen von Thai-Einwanderern, 58% HbE-Träger. Die große Häufigkeit des HbE in Gruppen mit ethnischen Beziehungen zu Südostasien unterstützen die Ansicht, daß das HbE-Gen von dort nach Indien eingeführt wurde.
    Notes: Summary Two groups in Assam (India) were examined. Among 80 Khasi (Bhoi subgroup), an austroasiatic tribal group, there were 41% HbE carriers; and in 82 Ahom, a group related to the Thai population, 58% of HbE carriers were found. This high prevalence of HbE in groups with ethnic relations to Southeast Asia supports the contention that the HbE gene was introduced to India from that area.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00702780
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