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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 33 (1961), S. 43-48 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 34 (1962), S. 280-283 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 90 (1968), S. 3326-3333 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
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  • 4
    ISSN: 1432-0630
    Keywords: 06 ; 07 ; 61.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A novel method is presented for measuring the spectral density of resistance fluctuations without the explicit determination of the voltage background noise (Johnson noise, pre-amplifier noise). The output of a standard ac bridge excited by a single-frequency alternating current is demodulated by two phase-sensitive detectors which operate in quadrature. When the phase difference between excitation and detection is properly set, the real part of the cross-spectral density of the two demodulators shows only the spectral density of the resistance fluctuations and not the disturbing background noise. The feasibility of our new method is demonstrated by measurements of 1/f noise of a thin-film A1 sample.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 1767-1774 
    ISSN: 0392-6737
    Keywords: Impurity and defect absorption in solids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto I centri microscopici di diffusione in cristalli accresciuti di AgGaS2 sono stati studiati col microscopio ottico e col microscopio elettronico a scansione. I difetti consistono in placchette rettangolari che giacciono nei piani (100) e (010). La loro dimensione maggiore (fino a 100 μm) era parallela alla direzione [001]. La loro dimensione minore è parallela alle direzioni [100] e [010], rispettivamente. I centri di diffusione erano usualmente spessi alcune frazioni di micrometro e non sembravano avere una composizione diversa dalla fase della matrice, secondo risultati dell'analisi a disperisione di energia. I difetti possono essere eliminati per ricottura in Ag2S o spegnimento da temperature elevate, il che suggerisce che i difetti possono essi stessi consistere in una regione a due fasi, parte della quale dovrebbe essere ricca di Ga2S3, dove particelle della seconda fase a barretta o a placchetta sono inglobate nella matrice. La quantità e le dimensioni di questa seconda fase rendono difficile un'analisi definitiva della composizione.
    Abstract: Резюме Используя оптическую и электронную сканируюшую микросконию, исследуются микроскопические центры рассеяния в AgGaS2. Дефекты состоят из прямоугольных пластинок, расположенных в плоскостях (100) и (010). Их наибольший размер (до 100 мкм) параллелен направлению [001]. Их наименьший размер соответственно располозен параллельно направлениям [100] и [010]. Центры рассеяния обычно представляют осколки микронной толщины и согласно анализу диссипации энергии, по-видимому, имеют состав, не отличающийся от матричной фазы. Дефекты могут быть удалены поредством отжита Ag2S или посредством закалки. Предполагается, что сами дефекты могут состоять из двухфазных областей, часть из которых должна быть обогащена Ga2S3, где стержне-подобные и пластино-подобные частицы второй фазы внедрены в матрипу. Количество и размер второй фазы затрудняет окончательный анализ состава.
    Notes: Summary Microscopic scattering centers in as-grown AgGaS2 were investigated by optical and scanning electron microscopy. The defects consisted of rectangular platelets lying in the (100) and (010) planes. Their longest dimension (up to 100 μm) was parallel to the [001]-direction. Their shorter dimension was parallel to the [100] and [010] directions, respectively. The scattering centers were usually fractions of a micrometer thick and did not appear to have a different composition than the matrix phase according to results by energy-dispersive analysis. The defects can be eliminated by annealing in Ag2S or quenching from elevated temperature, which suggests that the defects may themselves consist of a two-phase region, part of which should be Ga2S3-rich, where rodlike or platelike second-phase particles are embedded in the matrix. The quantity and the size of this second phase make a definitive compositional analysis difficult.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 27 (1962), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The concentrations of 27 trace elements were determined in four meats: beef, pork, ham, and chicken. Because the concentrations of most of these elements were expected to be very small, the extremely sensitive method of neutron activation analysis was used in this study. Qualitative analyses were performed for 8 of the elements, and the concentrations of 19 elements were determined quantitatively. The quantitatively measured concentrations varied from ∼0.1% for phosphorus to ∼10−5 ppm for cerium. Most data are estimated to be accurate to ±10%. The results demonstrate the applicability of this analytical method to determination of the inorganic constituents in foods and related substances at a constant level of accuracy throughout the concentration ranges of practical interest.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 25 (1960), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 21 (1956), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Neutral lipid (NL) and phospholipid (PL) fractions and their corresponding fatty acid profiles from the L. dorsi of Bison, Hereford, and Brahman steers of similar age finished on identical diets were determined. Compositional differences were related to sensory characteristics of the samples. Phosphatidylcholine + lysophosphatidylethanolamine (PC + LPE) existed in the highest concentration in all samples evaluated followed by lysophosphatidylcholine (LPC), phosphatidylethanolamine (PE), sphingomyelin (SPH), fraction one and phosphatidylserine (PS). Bison contained more total PL, particularly PC + LPE and LPC, than the other two bovine species. Polyunsaturated fatty acid (PUFA) composition of these PL was greater for Bison. Off-flavor and aftertaste increased with increasing levels of PC + LPE and LPC due to their greater composition of PUFA.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 166 (1950), S. 520-521 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The use of either malonic ac d (10 gm.) or pro-pionic acid (10 ml.)16 in conjunction with butanol (40 ml.) and water (50 ml.) as partitioning solvents has also been shown to avoid the over-all blackening of the paper produced by spraying with the silver reagent and subsequent heating. Experiments ...
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