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
Filter
  • Articles: DFG German National Licenses  (14)
Source
  • Articles: DFG German National Licenses  (14)
Material
Years
  • 1
    Electronic Resource
    Electronic Resource
    Graft copolymerization of acrylamide onto a polyethylene surface pretreated with glow discharge (1986)
    s.l. : American Chemical Society
    Macromolecules 19 (1986), S. 1804-1808 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00161a005
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Synthesis of Graft Copolymer by Coupling Condensation through Acetalization (1979)
    s.l. : American Chemical Society
    Macromolecules 12 (1979), S. 808-813 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma60071a003
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Study on decrease in lasing threshold current of GaAs/AlGaAs single quantum-well lasers through introduction of superlattice waveguide layers (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 4755-4758 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A systematic study for evaluating the effect of introducing short-period superlattice waveguide layers on the threshold current of single quantum-well diode lasers is reported. The waveguide layers which consist of short-period GaAs/AlAs superlattices, in place of AlGaAs alloys, resulted in a decrease by a factor of 4–6 in the lasing threshold current density of GaAs/AlGaAs single quantum-well diode lasers of separate confinement heterostructure. A time-resolved photoluminescence study of those laser structures revealed that the threshold current reduction was the result of an improvement of overall nonradiative carrier recombination lifetime of single quantum wells by more than a factor of 10.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340110
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Application of picosecond light pulses generated from an AlGaInP visible diode laser for photoluminescence decay measurement of GaAs/AlGaAs quantum wells (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 663-665 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The photoluminescence decay of GaAs/AlGaAs quantum wells was successfully measured at room temperature by using 660-nm picosecond light pulses from an AlGaInP diode laser driven by short pulse current. Our experimental results reveal that picosecond light pulses from visible diode lasers may be widely applicable, in place of mode-locked gas, solid-state, or dye lasers, for studying the fast carrier recombination properties of many kinds of materials including GaAs and AlGaAs in the wavelength region of deep red to infrared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139805
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Reduction in interfacial recombination velocity by superlattice buffer layers in GaAs/AlGaAs quantum well structures (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 2427-2428 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The values of interfacial recombination velocities in GaAs/AlGaAs double heterostructures and quantum wells grown by molecular beam epitaxy with and without superlattice cladding layers are obtained with photoluminescence time-decay measurements. The authors show that superlattice layers reduce the interfacial recombination velocity from 330 cm/s, the value for double heterostructures with alloy cladding layers, to 40 cm/s, and that they have small effect on the GaAs bulk lifetime.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101097
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Surface-emitting GaAs/AlGaAs lasers with dry-etched 45° total reflection mirrors (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 2389-2391 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Surface-emitting GaAs/AlGaAs lasers with 45° total reflection mirrors have been successfully produced using a 45° tilted reactive ion beam etching technique. The ratio of surface-emitted light output power to edge-emitted light output power was obtained at values as high as 77%. The total reflection mirror was formed within 1° of the desired precise 45° angle. This type of surface-emitting laser is promising for optoelectronic integrated circuits because of the simplicity of its structure and fabrication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101087
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    EXISTENCE OF ASCORBIC ACID AS AN ACTIVATOR OF THIAMINE DlPHOSPHATASE IN RAT BRAIN (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 32 (1979), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The effect of the supernatant fraction (105,000 g for 60 min) of rat brain on the microsomal thiamine diphosphatase activity was examined. The thiamine diphosphatase activity was increased by addition of the supernatant fraction. The factor activating the enzyme was a heat-stable and dialyzable substance. It caused lipid peroxidation in the microsomes and the increase of the enzyme activity was mediated through lipid peroxidation of the preparation. When the supernatant fraction was chromatographed on columns of Sephadex G-25 and Dowex 1 × 2, the activator was eluted in fractions containing ascorbic acid. The inhibitory factor of ATPase present in the supernatant fraction was also eluted with the activator. The u.v.-spectrum of the active fraction obtained by these chromatographies was the same as that of ascorbic acid. These findings indicate the existence of ascorbic acid as an activator of thiamine diphosphatase in rat brain and confirm the previous finding that the soluble factor inhibiting ATPase activity is ascorbic acid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1979.tb00369.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    PROPERTIES OF THIAMINE DI- AND TRIPHOSPHATASES IN RAT BRAIN MICROSOMES: EFFECTS OF CHLORPROMAZINE (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 24 (1975), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— The mechanism of the action of chlorpromazine on rat brain thiamine phosphatases were studied to clarify the properties of these enzymes in the CNS. Chlorpromazine at concentrations of 0.25-1.0 mm caused marked decrease of microsomal and soluble thiamine triphosphatase (TTPase) activities and marked increase of microsomal thiamine diphosphatase (TDPase) activity. Imipramine and desipramine also inhibited TTPase but did not cause any marked change in TDPase activities. Addition of chlorpromazine (0.5 mm) decreased the Vmax of microsomal TTPase by about one-half, increased that of TDPase about 3-fold, and lowered the Km value for TDP but not for TTP.Acetone treatment of the microsomal fraction lowered the TTPase activity and markedly enhanced the TDPase activity. In acetone-treated microsomes, chlorpromazine also inhibited TTPase activity but did not activate TDPase. Deoxycholate had similar effects to chlorpromazine on these enzyme activities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1975.tb03900.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    ENHANCEMENT OF BRAIN THIAMINE DIPHOSPHATASE ACTIVITY OF RATS BY INJECTION OF CHOLINERGIC DRUGS (1971)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 18 (1971), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— The effects of cholinergic drugs on thiamine diphosphatase (TDPase) in rat brain, liver and kidney were studied to clarify the role of the enzyme in the central nervous system.Brain TDPase activity was markedly increased by intraperitoneal injection of a sub-lethal dose of physostigmine, ambenonium or pentetrazol. These drugs also increased the activity in the kidney, but not liver. Strychnine, atropine, and scopolamine did not affect the activity of brain TDPase, but decreased the enzyme activity of liver and kidney. Physostigmine also increased the activity of brain thiamine monophosphatase.Brain TDPase activity reacheda maximum 30 minafterphysostigmine injection (1.0mg/kg). However, inhibition of brain acetylcholinesterase activity was greatest 45 min after physostigmine injection. The TDPase and AChE activities had both returned to normal values 60 min after the injection. The durations of these changes of TDPase and AChE activity corresponded to the duration of the tremor induced by physostigmine. The contents of total and phosphorylated thiamines in the brain but not in the liver or kidney were significantly reduced by physostigmine.The relationship between ACh and activation of TDPase activity by cholinesterase inhibitors is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1971.tb00001.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    THE ACTIVATION OF THIAMINE DIPHOSPHATASE BY ATP IN RAT BRAIN (1970)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 17 (1970), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 〈list xml:id="l1" style="custom"〉1Thiamine diphosphatase (TDPase) of brain was activated by a low concentration of ATP.2In thiamine-deficient rats TDPase activity in the brain increased significantly relative to that in pair-fed animals, while in liver it decreased by the same amount as in the pair-fed controls.3Liver TDPase was localized almost entirely in the soluble fraction, but in the brain it was bound to insoluble protein. On treatment with Triton X-100 brain TDPase activity increased.4The ATP content of the brain of deficient rats, but not the ADP or AMP content, was significantly higher than in the control group. The level of inorganic phosphate in the brain and spinal cord of deficient animals was elevated markedly, while that of P-creatine was unchanged.5The possible roles of brain TDPase in relation to nerve conduction and the blood-brain barrier are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1970.tb06872.x
    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...