Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Magnetic domain structures and giant magnetoresistance of granular (Ni74Fe16Co10)35Ag65 films (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 4216-4220 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this article, granular (NiFeCo)35Ag65 films having a nominal atomic ratio of Ni:Fe:Co=74:16:10, near the zero magnetostriction ternary alloy, were prepared by dc magnetron co-sputtering. Subsequent thermal annealing was performed in a vacuum (〈2×10−3 Pa) furnace for 1 h at various temperatures ranging from 250 to 500 °C. The crystalline structure and magnetic structure of the as-deposited and annealed films were characterized by Rutherford backscattering spectroscopy, x-ray diffraction, atomic force microscopy, and magnetic force microscopy. The giant magnetoresistance (GMR) for the films was measured as a function of temperature between 20 and 300 K using a conventional four-point probe dc technique in the presence of a magnetic field up to 7.6 kOe. It was found that, the crystalline structure, the magnetic structure, and consequently the GMR were closely related to the thermal treatment. The film annealed at the temperature of 300 °C has the isolated single domain structure and the highest GMR value of 19.1% at 20 K, while the film annealed at 500 °C has the long-range domain structure and the lowest GMR value of 9.9% at 20 K. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1308063
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Electrical characteristics of 25 nm Pr(ZrTi)O3 thin films grown on Si by metalorganic chemical vapor deposition (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 2157-2159 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Pb(Zr0.5Ti0.5)O3 thin films 25 nm in thickness were grown on LaNiO3/Pt/Ti buffered Si substrates at 600 °C by metalorganic chemical vapor deposition. P–E studies showed a remanent polarization value of 8 μC/cm2 with a coercive field of 200 kV/cm. In polarization fatigue studies, these films only showed slight degradation in remanent polarization up to 4×108 cycles (±3 V oscillation) before breakdown. Moreover, the effect of space charge on the C–V behavior of these films was illustrated I–V characteristics of these films were also described. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1305824
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Characterization of CaTiO3-modified Pb(Mg1/3Nb2/3)O3 dielectrics (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 2516-2519 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Pb(Mg1/3Nb2/3)O3 dielectrics modified by CaTiO3 were prepared by a solid-state reaction method, and microstructure analyses were performed together with the dielectric characterization. Solid solutions with cubic perovskite structures were obtained for compositions of 0–60 mol %CaTiO3, and the orthorhombic perovskite structures were observed for compositions near to the end member of CaTiO3 in the present system. The dielectric loss and temperature coefficient could be pronouncedly reduced by incorporating CaTiO3 into Pb(Mg1/3Nb2/3)O3. Low-loss dielectrics (tan δ∼10−4 at 1 MHz) with dielectric constants of 120–262 and small temperature coefficient (τε∼−960 to −1100 ppm/ °C) were obtained, and further improvement of dielectric properties could be expected through structural modifications. Good microwave dielectric properties, ε=172.6 and Qf=1930 GHz, were achieved in a composition of 0.4Pb(Mg1/3Nb2/3)O3/0.6CaTiO3, where the temperature coefficient of resonant frequency τf was estimated as 470 ppm/ °C. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372212
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    One-week regimens containing ranitidine bismuth citrate, furazolidone and either amoxicillin or tetracycline effectively eradicate Helicobacter pylori: a multicentre, randomized, double-blind study (2001)
    Oxford UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 15 (2001), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The metronidazole resistance of Helicobacter pylori strains has increased rapidly.〈section xml:id="abs1-2"〉〈title type="main"〉Aim:To evaluate the efficacy and safety of new 1-week regimens containing ranitidine bismuth citrate, furazolidone and either amoxicillin or tetracycline.〈section xml:id="abs1-3"〉〈title type="main"〉Methods:One hundred and twenty patients with H. pylori-positive inactive duodenal ulcer or non-ulcer dyspepsia diagnosed by endoscopy were recruited randomly to receive one of two regimens for 7 days: ranitidine bismuth citrate, 350 mg b.d., furazolidone, 100 mg b.d., and either amoxicillin, 1000 mg b.d. (n=60), or tetracycline, 500 mg b.d. (n=60). H. pylori infection was identified by rapid urease testing and histology. 13C-Urea breath test was performed to evaluate the cure of H. pylori infection at least 4 weeks after completion of triple therapy.〈section xml:id="abs1-4"〉〈title type="main"〉Results:The eradication rates of H. pylori by ranitidine bismuth citrate–furazolidone–amoxicillin and ranitidine bismuth citrate–furazolidone–tetracycline regimens were 82% and 85% (P 〉 0.05), respectively, by intention-to-treat analysis, and 85% and 91% (P 〉 0.05), respectively, by per protocol analysis. Adverse effects were mild in both ranitidine bismuth citrate–furazolidone–amoxicillin and ranitidine bismuth citrate–furazolidone–tetracycline groups.〈section xml:id="abs1-5"〉〈title type="main"〉Conclusions:One-week regimens containing ranitidine bismuth citrate, furazolidone and amoxicillin or tetracycline are well tolerated and effective for the eradication of H. pylori.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2036.2001.01122.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Metallothionein-null mice exhibit reduced tolerance to ultraviolet B injury in vivo (2004)
    Oxford, UK : Blackwell Science Ltd
    Clinical and experimental dermatology 29 (2004), S. 0 
    Details
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Events that induce expression of the metallothionein (MT) gene, such as injection of cadmium chloride, cold stress or topical application of 1,25-dihydroxyvitamin D3, can deplete the number of ultraviolet (UV) B-induced sunburn cells (SBC) in mouse skin in vivo. MT-null mouse skin explants exhibit reduced tolerance to UVB injury in vitro. However, the in vivo response of MT-null mice to UVB injury has not been investigated. In the present study, we investigated the role of the MT gene on UVB injury in vivo. MT-null mice that are deficient in MT-I and MT-II genes were studied and compared with homozygous wild-type mice. Mouse dorsal skin was irradiated with 0.05, 0.70 and 1.40 J/cm2 UVB. The thickness of the dorsal skin was measured with a spring micrometer before and 24 h after UVB irradiation. In addition, SBC were counted 24 h after UVB irradiation. No significant difference was found in the change of skin thickness between MT-null mice and control mice irradiated with low-dose UVB (0.05 J/cm2) (Student's t-test, t = 1.519, P = 0.167). At higher doses (0.70 and 1.40 J/cm2), the skin of MT-null mice became much thicker than that of control mice (Student's t-test, t = 6.576, P 〈 0.01 and t = 3.142, P = 0.007, respectively). More SBC were detected in MT-null mice skin irradiated with the highest dose of UVB (1.40 J/cm2) (Student's t-test, t = 4.258, P 〈 0.01). These results suggest that the MT gene in mice has a photoprotective role in vivo.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2230.2004.01424.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    ASSESSMENT OF A WASH TREATMENT WITH WARM CHLORINATED WATER TO EXTEND THE SHELF–LIFE OF READY–TO–USE LETTUCE (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food quality 26 (2003), S. 0 
    Details
    ISSN: 1745-4557
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The influence of a warm chlorine wash on the microbiological quality and shelf–life of ready–to–use (RTU) shredded iceberg lettuce was examined using the electronic nose (EN) and culture methods. There was a significant difference in psychrotrophic counts (P〈0.0001) of warm chlorine (100 ppm) washed lettuce at 47 ± 2C for 30 s, 60 s, and 180 s exposure from days 1 to 10 of storage at 4C compared with cold chlorine (100 ppm) washed lettuce at 4 ± 1C for 30 s. There were no significant differences in psychrotrophic counts between wash treatments of 30 s and 60 s during 17 days storage (P 〈 0.05). The EN detected initially high levels of volatiles in this group compared with cold treatment. Lettuce samples treated with cold or warm chlorine wash water showed no differences in the presence/absence or levels of Listeria monocytogenes. The warm chlorine washed lettuce samples were rated acceptable upon sensory evaluation up to day 14.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-4557.2003.tb00238.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Fatty acids modulate protein kinase C activation in porcine vascular smooth muscle cells independently of their effect on de novo diacylglycerol synthesis (2000)
    Springer
    Diabetologia 43 (2000), S. 1136-1144 
    Details
    ISSN: 1432-0428
    Keywords: Keywords Diabetes mellitus ; protein kinase C ; diacylglycerol ; non-esterified fatty acids ; platelet-derived growth factor ; vascular smooth muscle ; cultured cells.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Aims/hypothesis. Diabetes-induced activation of protein kinase C has been associated with the development of vascular complications. Elevated de novo diacylglycerol synthesis has been postulated to underlie this protein kinase C activation. Diabetes also increases the circulating concentrations of non-esterified fatty acids, which are immediate precursors of diacylglycerol through the de novo pathway. We hypothesized that increased fatty acids contribute to de novo diacylglycerol synthesis and activation of protein kinase C in vascular cells. Methods. Primary cultures of porcine carotid smooth muscle cells were exposed to fatty acids, bound to albumin in physiologic ratios. Diacylglycerol and triacylglycerol were measured in extracts of these cells. Protein kinase C activation was measured as membrane translocation with isoform-specific antibodies. Results. Saturated fatty acids caused considerable accumulation of diacylglycerol through de novo synthesis. Unsaturated fatty acids increased triacylglycerol, but not diacylglycerol. Platelet-derived growth factor activated the α, ɛ and ζ protein kinase C isoforms. Activation of the α and ζ isoforms was amplified by oleate pretreatment but inhibited by palmitate. In the absence of growth factor stimulation, neither palmitate nor oleate had any effect on the membrane/cytosol distribution of any protein kinase C isoform. Conclusion/interpretation. Saturated fatty acids elicited de novo diacylglycerol synthesis in vascular smooth muscle cells without activating protein kinase C. Effects of fatty acids on protein kinase C activation by platelet-derived growth factor did not correlate with the effects on de novo diacylglycerol synthesis. These results indicate that de novo diacylglycerol synthesis is, by itself, insufficient to activate protein kinase C. [Diabetologia (2000) 43: 1136–1143]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001250051504
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    QTL mapping for the paste viscosity characteristics in rice (Oryza sativa L.) (2000)
    Springer
    Theoretical and applied genetics 100 (2000), S. 280-284 
    Details
    ISSN: 1432-2242
    Keywords: Key words Rice ; Paste viscosity characteristics ; Rapid Visco Analyser (RVA) ; Quantitative trait locus (QTL) ; Doubled haploid (DH) population
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  In order to understand the genetic basis of the paste viscosity characteristics (RVA profile, which is tested on the Rapid Visco Analyser) of the rice grain, we mapped QTLs for RVA profile parameters using a DH population derived from a cross between an indica variety, Zai-Ye-Qing 8 (ZYQ8), and a japonica variety, Jing-Xi 17 (JX17). Evidence of genotype-by-environment interaction was found by comparing the mapped QTLs between two locations, Hainan (HN) and Hangzhou (HZ). A total of 20 QTLs for six parameters of the RVA profiles were identified at least one location. Only the waxy locus (wx) located on chromosome 6 was detected significantly at both environments for five traits, i.e. hot paste viscosity (HPV), cool paste viscosity (CPV), breakdown viscosity (BDV), consistency viscosity (CSV) and setback viscosity (SBV). This locus explained 19.5%–63.7% of the total variations at both environments, suggesting that the RVA profiles were mainly controlled by the wx gene. HPV, CPV, BDV, CSV and SBV were also controlled by other QTLs whose effects on the respective parameter were detected only in one environment, while for the peak viscosity (PKV), only 2 QTLs, 1 at HN,the other at HZ, were identified. These results indicate that RVA profiles are obviously affected by environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050037
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Adaptive multigrid solution of the 2D-Euler equations on an unstructured grid (2000)
    Springer
    Acta mechanica 144 (2000), S. 43-56 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The AUSM+ (Advection Upstream Splitting Method) scheme which was developed on a structured grid has been extended to be used on an unstructured grid. The monotone linear reconstruction procedure using Green-Gauss theory is utilized to obtain second-order spatial accuracy. Barth's limiter is employed to prevent the solution from spurious oscillations. An adaptive multigrid strategy is used to accelerate the convergence. Numerical results for several test cases are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01181827
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Genotype × Region Interaction for Two-Row Barley Yield in Canada (2000)
    Springer
    Crop science 40 (2000), S. 1-6 
    Details
    ISSN: 1435-0653
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Hordeum vulgare L.) breeding programs recognize eastern and western Canada as separate target regions, but the extent of local adaptation to regions and subregions within them has not been studied. Genotype × region and subregion interactions were estimated in 145 lines from the two-row barley cross Harrington/TR306 in 22 trials in 1992-1993. The trials were grouped into five subregions (Maritimes–Quebec, Ontario, Manitoba–North Dakota, Saskatchewan, and Alberta) and two regions (eastern Canada and western Canada plus North Dakota). Variance components were estimated by a model in which the genotype × location σ2 GL variance was subdivided into a genotype × region (or subregion) variance (σ2 GS), and a within-region or -subregion σ2 GL. No σ2 GS was observed within the eastern or western regions, and genotypic correlations across subregions within regions approached 1.0. Significant σ2 GS was observed for eastern versus western Canada, but the correlation between genotypic effects across these regions was 0.83. In a selection experiment, subdivision of the eastern or western regions did not increase response. Selection in the east produced greater yields in both the east and west. The same genotype ranked first for yield in both regions. There was little specific adaptation to subregions, and two-row barley genotypes were broadly adapted across northern North America. Further subdivision of the regions is unwarranted, and selection in either region is likely to result in response in the other. The lack of local adaptation indicates that breeding programs that test broadly are likely to outperform ones that are narrowly targeted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...