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  • 1
    Digitale Medien
    Digitale Medien
    Introduction of extrinsic defects into mercuric iodide during processing (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 4591-4594 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Low temperature (4.2 K) photoluminescence spectroscopy (PL) measurements were performed on mercuric iodide (HgI2) crystals which were intentionally doped with copper or silver during KI etching. PL spectra obtained after these doping experiments show specific Cu and Ag features similar to those previously observed after deposition of Cu or Ag contacts on mercuric iodide crystals. The in-diffusion of Cu or Ag into bulk HgI2 has also been confirmed a few days after doping. This diffusion introduces new recombination centers in the material. This work suggests that the processing steps used to fabricate mercuric iodide nuclear detectors can lead to the introduction of new defects which are detrimental to detector performance.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.352749
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  • 2
    Digitale Medien
    Digitale Medien
    High resolution 4.2 K near band-gap photoluminescence spectrum of mercuric iodide (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 2951-2954 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We have investigated in detail (resolution up to 0.35 A(ring)) the near-band-gap 4.2 K photoluminescence spectrum of undoped Hgl2 in its red tetragonal form. At least 26 emission lines are resolved in the wavelength region between 5290 and 5400 A(ring). Many of these are reported for the first time. We have also tabulated the steplike emission lines between 5220 and 5290 A(ring).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.346429
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  • 3
    Digitale Medien
    Digitale Medien
    Time-gated gain cell for frequency-stable, single-longitudinal-mode operation of a transverse, electric, atmospheric CO2 laser (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 1663-1664 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A time-gated gain cell has been demonstrated as a method for producing single-longitudinal-mode output from a pulsed transverse, electric, atmospheric (TEA) carbon dioxide laser. The gain cell is operated as an oscillator during the time between the laser pulses and is rapidly dropped below threshold during the TEA pulse output to avoid degradation of the gain-switched spike in the laser pulse. Standard dither-stabilization techniques can be used during the time between the laser pulses (cw oscillation) to position the output coupler for single-mode operation and frequency stabilization while the gain cell is operated above threshold.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1144046
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  • 4
    Digitale Medien
    Digitale Medien
    Effect of coupling on magnetic properties of uniaxial anisotropy NiFeCo/TaN/NiFeCo sandwich thin films : The 6th joint magnetism and magnetic materials (MMM)-intermag conference (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 6986-6988 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The coercivity of the coupled NiFeCo thin films is a function of nickel-iron-cobalt (NiFeCo) film thickness and tantalum nitride (TaN) intermediate layer thickness. This can be attributed to the variation of energy and magnetization gradients of a domain wall. The magnetization gradient can be affected by a thickness-induced coupling effect associated with altering the exchange and magnetostatic interactions between the two NiFeCo films. Decreasing the exchange coupling and increasing the magnetostatic coupling between the coupled NiFeCo films tends to decrease the energy and magnetization gradients of domain walls and results in decreased coercivity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.358064
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  • 5
    Digitale Medien
    Digitale Medien
    Changes in Chicken Muscle Proteins During Aseptic Storage at Above-Freezing Temperatures (1964)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 29 (1964), S. 0 
    Details
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Analysis of chicken muscle proteins of 10-week-, 4-month-, and 8-month-old birds, stored under aseptic conditions at 0, 2, and 5°C, showed quantitative changes in the total extractable, myofibrillar, sarcoplasmic, and non-protein-nitrogen fractions during 7 weeks storage. Changes were small in the stroma-protein fraction, actomyosin fraction, and the myosin-adenosinetriphos-phatase activity of the actomyosin fraction. The myosin fraction increased during storage except in breast muscle of 10-week-old birds. The sarcoplasmic-protein fraction decreased in the leg muscle of 10-week-old birds and the breast muscle of 4- and 8-month-old birds, but not in the breast muscle of 10-week-old birds. The non-protein-nitrogen fraction and the amount of protein-breakdown products increased in both breast and leg meat, irrespective of bird age. Proteolysis increased with storage time and temperature. The significance of proteolytic changes in quality deterioration is discussed, and the results are compared with those previously obtained for storage at below-freezing temperatures.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2621.1964.tb01692.x
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  • 6
    Digitale Medien
    Digitale Medien
    New gas-phase experiment at the normal incidence beam line at MAX : Proceedings of the 4th international conference on synchrotron radiation instrumentation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 1338-1340 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: We have recently started a new program to study ion fragments from photoionization and photodissociation processes, using synchrotron radiation at the normal incidence beam line at the electron storage ring MAX in Lund, Sweden. The experimental chamber is connected to the beam line via a simple arrangement consisting of a glass capillary with ∼25% transmission in the wavelength region 300–700 A(ring), leading through a differential pumping stage. This arrangement allows us to operate the target gas chamber at pressures of 1–3⋅10−5 Torr. The design and performance of this new experiment is presented as well as examples of the first results from experiments on diatomic molecules and noble gases. In particular, it has been possible to record ion spectra with sufficient resolution and intensity to permit a detailed line profile analysis of autoionization resonances.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1143063
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  • 7
    Digitale Medien
    Digitale Medien
    Investigation of copper electrodes for mercuric iodide detector applications (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 7265-7267 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Copper diffusion in mercuric iodide was studied by low-temperature photoluminescence (PL) spectroscopy and Auger electron spectroscopy. A broad radiative emission band at a wavelength of about 6720 A(ring) in the PL spectra was found to be related to Cu incorporation in the crystal. PL spectra obtained from surface doping experiments indicate that Cu is a rapid diffuser in HgI2 bulk material. Auger electron spectroscopy performed as a function of depth from the crystal surface confirms the rapid bulk diffusion process of Cu in HgI2. Fabrication of HgI2 nuclear detectors with Cu electrodes indicates that Cu is not acceptable as an electrode material, which is consistent with the fact that it diffuses easily into the bulk crystal and introduces new radiative recombination centers.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.344560
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  • 8
    Digitale Medien
    Digitale Medien
    Morphological and behavioural development of halibut, Hippoglossus hippoglossus (L.) larvae (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 37 (1990), S. 0 
    Details
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Live yolk-sac halibut, Hippoglossus hippoglossus (L.) larvae from rearing experiments at Austevoll Aquaculture Station, Norway, were examined from hatching to past first feeding for developmental morphology and behaviour. The findings include development of the respiratory and circulatory organs, eye pigmentation, mouth formation, organs of the digestive system and the process of yolk absorption, as well as swimming speed and activity levels.A stomodeum is not present at hatching although drinking is possible through a pair of branchial pits which gradually develop into the operculum and gill basket. The mouth normally opens slowly, the gape being restricted by a transverse septum until bones are formed. The amount of time spent swimming varies from less than 15% of the observation period during the first 2 weeks after hatching to between 70 and 100% around the seventh week after hatching, when individual differences become more apparent. Larvae generally react with a burst of swimming when two come into contact. Speed and duration of swimming seems to be correlated with development of eye pigment, heart size and fin formation. The yolk-sac period is divided into four stages.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1095-8649.1990.tb05876.x
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  • 9
    Digitale Medien
    Digitale Medien
    Physicochemical Changes in Some Frozen Foods (1964)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 29 (1964), S. 0 
    Details
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: The pH of peas and of poultry meat frozen pre- and post-rigor was measured during frozen storage at −10°C for up to 6 months. In peas it decreased sharply from 6.7 to as low as 6.0 during the first 3 days of storage, increased to 7.0 during the next 2-3 weeks, decreased to 6.4 in another 3 weeks, and remained there with only small fluctuations during the rest of the storage time. Breast and leg meat of poultry resembled each other in pH changes after freezing: increases and decreases of about 0.2–0.3 unit occurred in all samples at about the same time. Meat frozen pre-rigor differed from meat frozen post-rigor, however, the latter increasing 0.2–0.3 pH unit during freezing, and the former changing little or decreasing slightly under these conditions. Differences in pH between samples at a given time were related to differences in initial pH.Studies with salt solutions as similar as possible in composition to the foods tested, and with gelatin solutions, showed that pH changes in frozen foods were caused mainly by increasing concentration of food components, including proteins, in the unfrozen phase, by precipitation of salts, by interaction of proteins with ionic substances, and by enzymatic activity (e.g. lactic acid formation) during frozen storage.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2621.1964.tb00408.x
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  • 10
    Digitale Medien
    Digitale Medien
    Some Protein Changes During Post-Mortem Tenderization in Poultry Meat (1964)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 29 (1964), S. 0 
    Details
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: In both breast and leg muscle from 6-, 9-, and 12-month-old chickens, held for aging at 0°C, the buffer-extractable nitrogen rapidly decreased after death during the onset of rigor and gradually increased to a maximum value during post-rigor aging. Changes in extractable nitrogen occurred mainly as a result of changes in the solubility of myofibrillar proteins. Changes in sarcoplasmic and stroma protein fractions were small. In the nonprotein-nitrogen fraction, some of the amino-acid-containing polymers were removed during the onset of rigor mortis as a result of their interaction or aggregation with proteins. During the post-rigor tenderization period, amino acids and peptide increased in meat as a result of proteolysis. Different rates of post-mortem tenderization in breast and leg muscle appear to be related to the differences in stroma protein content of muscle. Proteolysis seems to weaken or break the bonds which bind myofibrils to the matrix of the muscle and causes protein changes that are responsible for post-rigor tenderization.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2621.1964.tb00416.x
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