Library

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
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 67 (1963), S. 1220-1223 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 66 (1962), S. 1928-1932 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 7 (1960), S. 0 
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Ergosterol was isolated from the non-saponifiable lipids of Euglena. For this, after saponification of the cells, the petroleum-ether extract was chromatographed on deactivated alumina. Development was achieved by pet. ether and 10% (v/v) benzene in pet. ether, and the sterol fraction was subsequently eluted with 10% (v/v) ethyl acetate in pet. ether. This sterol was identified as ergosterol by a) precipitation with digitonin, b) The Liebermann-Burchard reaction, c) co-chromatography with known ergosterol, d) ultraviolet absorption spectrum, e) conversion to the acetate with determination of the melting and mixed melting points and !” infra-red absorption spectrum of the acetate derivative. By these techniques, ergosterol content was measured in the-following strains of Euglena gracilis under various conditions of nutrition and illumination: bacillaris and Z strains, and several albino and pigment mutants derived from them. A. functional chloroplast seems unnecessary for ergosterol synthesis; the ergosterol content of cells (dry weight basis) was constant regardless of strain and growth conditions.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 8 (1961), S. 0 
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Electron and fluorescence microscopy reveal a proplastid about 1 μ in diameter in dark-grown Euglena gracilis quite like those in higher plants. After the cells are placed in the light these structures lengthen, probably in part by coalescence of several proplastids. Full size is reached in some cells after about one day in light. Lamellae, growing as blebs off the inner proplastid membrane, develop in a roughly linear fashion with time, art average of one new lamella appearing after each 6 hours in the light. The maturation of the proplastid thus appears to differ appreciably from that in higher plants since the latter presumably create several lamellae simultaneously, and these appear able to replicate themselves in a geometrically parallel fashion. The question is raised whether the apparent differences in development may not be due to lesser discrimination in observing the sequence in the higher plants, for there are no observations necessarily inconsistent with the sequence found in Euglena.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK and Boston, USA : Blackwell Publishers Ltd.
    Review of international economics 9 (2001), S. 0 
    ISSN: 1467-9396
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Owing to their low bargaining power and high negotiation costs, microstates face severe disadvantages when dealing with the outside world. Forming a group with neighboring nations might be an effective instrument to address this problem. This paper presents a model in which the decision to form, expand or join a regional club is based on negotiation costs and bargaining power rather than on the traditional costs and benefits of trade integration. The model is used to determine the optimal and the equilibrium group size under various entry conditions. The welfare implications of the entry conditions are also examined.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @world economy 27 (2004), S. 0 
    ISSN: 1467-9701
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Law , Economics
    Notes: This paper draws on Hinkle and Schiff (2003). It analyses the planned Economic Partnership Agreements (EPAs) between the EU and Sub-Saharan Africa (SSA) from a development perspective. It does not take a position on whether SSA should enter into EPAs with the EU. Rather, it starts from the notion that the process of forming EPAs is unlikely to be reversed and examines the conditions that will maximise SSA's benefits from the EPAs. If this notion is correct, then the analysis presented in the paper applies. On the other hand, Pascal Lamy, the EU Trade Commissioner, made a proposal at the May 2004 G-90 summit in Dakar that might lead to a change in the EPA process. He proposed that the G-90, a group consisting of ACP and non-ACP LDC countries, should not have to make concessions at the WTO Doha Round of multilateral trade negotiations, i.e., he proposed a ‘free round’ for the G-90. This proposal opens the door to the possibility that the same might apply to the ACP countries in the EU-ACP negotiations and that the EPA process might be reversed. The paper considers the key issues raised by the planned EPAs, their relationship to the WTO's Doha Round and the EU's Everything-but-Arms Initiative, the changes needed to make the EPAs internally consistent, the domestic reforms in SSA that would need to accompany trade liberalisation in both goods and services, and the potential effects of the EPAs on regional integration in SSA. The EPAs will pose a number of policy challenges for SSA countries, including: restructuring of indirect tax systems, reduction of MFN tariffs, liberalisation of service imports on an MFN basis and related regulatory reforms in the services sector, and liberalisation of trade in both goods and services within the regional trading blocs in SSA. The paper also finds that the EPAs provide an opportunity to accelerate regional and global trade integration in SSA. To realise the potential development benefits of the planned EPAs, two steps are essential. First, the EU must, as it has stated, truly treat the EPAs as instruments of development, subordinating its commercial interests in the agreements to the development needs of SSA. Second, the SSA countries need to implement a number of EPA-related trade policy reforms. However, the latter is far from certain, given the lack of reform momentum in SSA.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 685-687 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present intensity-modulated photocurrent and infrared transmittance measurements on dye-sensitized solar cells based on a mesoporous titania (TiO2) matrix immersed in an iodine-based electrolyte. Under short-circuit conditions, we show that an elementary analysis accurately relates the two measurements. Under open-circuit conditions, infrared transmittance, and photovoltage measurements yield information on the characteristic depth at which electrons recombine with ions (the "locus of recombination"). For one particular series of samples recombination occurred near the substrate supporting the titania film, as opposed to homogeneously throughout the film. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 1924-1926 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report electromodulated reflectance spectra in n-i-p solar cells with hydrogenated amorphous silicon–germanium alloy absorber layers. At lower photon energies the spectra are determined by bulk electroabsorption, and exhibit peaks near the optical gap of the absorber layers. Voltage scaling of the electroabsorption spectra indicate a built-in potential of Vbi=1.17 V in cells with absorber layer band gaps of 1.50 eV; in conjunction with earlier work, this value argues against a systematic decline in Vbi with an absorber layer band gap. At higher photon energies the spectra are due to direct electroreflectance; the voltage scaling was consistent with model predictions for the electric field at the interface of the p-type and absorber layers. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Family process 42 (2003), S. 0 
    ISSN: 1545-5300
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Psychology
    Notes: The current study will examine behavioral difficulties among a sample of African American urban youth who were exposed to violence. Possible gender differences in disruptive behavioral difficulties, as well as possible associations between parental practices, family relationships, and youth disruptive behavioral difficulties are examined. A secondary data analysis from baseline data for 125 African American urban mothers and their children collected as part of a large-scale, urban, family-based, HIV prevention research study was analyzed. Findings reveal that externalizing behavioral problems in youth are associated with exposure to violence. Girls displayed significantly higher levels of externalizing behavioral difficulties than boys. Mothers' parenting practices and family relationships were associated with youths' externalizing behavior problems. Implications for interventions to reduce youths' exposure to violence and to develop gender sensitive interventions for youth and supportive interventions for their parents are discussed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 67 (1963), S. 1216-1219 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...