ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
    Anthraquinone Formation in Callus Cultures of Cassia podocarpa (1988)
    s.l. : American Chemical Society
    Journal of natural products 51 (1988), S. 492-495 
    Details
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/np50057a005
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Effect of nickel on certain physiological and biochemical behaviors of an acid tolerantChlorella vulgaris (1994)
    Springer
    BioMetals 7 (1994), S. 193-200 
    Details
    ISSN: 1572-8773
    Keywords: Chorella vulgaris ; acid tolerance ; ATPase ; nickel toxicity ; nutrient uptake ; photosynthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract This study concerns the inhibitory effects of acid pH and nickel on growth, nutrient (NO3 - and NH4 +) uptake, carbon fixation, O2 evolution, electron transport chain and enzyme (nitrate reductase and ATPase) activities of acid tolerant and wild-type strains of Chlorella vulgaris. Though a general reduction in all these variables was noticed with decreasing pH, the tolerant strain was found to be metabolically more active than the wild-type. A reduced cation (NH4 +, Na+, K+ and Ca2+) uptake, coupled with a facilitated influx of anions (NH4 +, PO4 3- and HCO3 -), suggested the development of a positive membrane potential in acid tolerant Chlorella. Nevertheless, a tremendous increase in ATPase activity at decreasing pH revealed the involvement of superactive ATPase in exporting H+ ions and keeping the internal pH neutral. A difference in Na+ and K+ efflux of the two strains at decreasing pH suggests there is a difference in membrane permeability. The low toxicity of Ni in the acid tolerant strain may be due to the low Ni uptake brought about by a change in membrane potential as well as in permeability. Hence, the development of superactive ATPase and a change in both membrane potential and permeability not only offers protection against acidity, but also co-tolerance to metals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00140491
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Cr(III), Fe(III), and Co(II) complexes of tetraazamacrocycles derived from 2,3-butanedione or benzil and 1,8-diamino-3,6-diazaoctane (1994)
    Springer
    Monatshefte für Chemie 125 (1994), S. 385-394 
    Details
    ISSN: 1434-4475
    Keywords: Tetraazamacrocycles ; Cr(III), Fe(III) and Co(II) Complexes ; Magnetic measurements ; Diffuse reflectance spectra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Kondensation von α-Diketonenen wie 2,3-Butandion oder Benzil mit 1,8-Diamino-3,6-diazaoctan in Gegenwart von Cr(III), Fe(III) und Co(II) resultiert in der Bildung von macrocyclischen Komplexen vom Typ [MLX2]X und [CoLX]X mit M=Cr(III), Fe(III), L=N4-Macrocyclus und X=NO 3 − oder Cl−. Die Komplexe wurden mittels Elementaranalyse, Leitfähigkeits-und magnetischen Messungen, Molekulargewichtsbestimmung und Infrarot- bzw. diffuser Reflexions-Spektren charakterisiert.
    Notes: Summary Template condensation of α-diketones such as 2,3-butanedione or benzil with 1,8-diamino-3,6-diazaoctane in the presence of Cr(III), Fe(III) and Co(II) results in the formation of macrocyclic complexes of the type [MLX2]X and [CoLX]X (where M=Cr(III), Fe(III), L=N4 macrocycle and X=NO 3 − or Cl−). The complexes have been characterized by elemental analyses, conductance and magnetic measurements, molecular weight determinations, infrared and diffuse reflectance spectral studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00811856
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Thin-layer chromatography of hydroxyanthraquinones in plant extracts (1981)
    Springer
    Chromatographia 14 (1981), S. 599-600 
    Details
    ISSN: 1612-1112
    Keywords: Thin-layer chromatography ; Hydroxyanthraquinones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Existing thin-layer chromatographic (TLC) methods for the separation of hydroxyanthraquinones in plant materials were found to have limited applications. This initiated the development of some new TLC systems to separate the five principal hydroxyanthraquinones: chrysophanol, physcion, emodin, rhein and aloe emodin normally present together in plant materials, on a single chromatogram and usually with a single solvent system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02262892
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Resolution of dianthrone glycosides and anthraquinone glycosides by thin-layer chromatography (1982)
    Springer
    Chromatographia 15 (1982), S. 249-250 
    Details
    ISSN: 1612-1112
    Keywords: Thin-layer chromatography ; Dianthrone glycosides ; Anthraquinone glycosides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Existing TLC systems for the separation of dianthrone glycosides (sennosides) and anthraquinone glycosides were found unsatisfactory. Separation of these two groups of glycosides was achieved using a conventional TLC development tank and also in a modern VARIO-KS-Chamber at a relative humidity of 32%. The separation in a VARIO-KS-Chamber was superior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265657
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Separation of carbazole alkaloids by two-dimensional thin-layer chromatography (1987)
    Springer
    Chromatographia 23 (1987), S. 205-206 
    Details
    ISSN: 1612-1112
    Keywords: Thin-Layer Chromatography ; Two-dimensional TLC ; Carbazole alkaloids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Attempts have been made to develop an efficient TLC method for the preparative separation of carbazole alkaloids since the existing TLC methods were unsuitable for preparative work. Excellent separation of these alkaloids was achieved on alumina plates with petroleum-ether (40–60°)-glacial acetic acid (8∶2) solvent mixture by using the technique of two-dimensional TLC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311481
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Effect of four common herbicides on the population of microorganisms in Red Sandy soil (1979)
    Springer
    Plant and soil 52 (1979), S. 451-452 
    Details
    ISSN: 1573-5036
    Keywords: Actinomycetes ; Azotobacter ; Bacteria ; Lasso ; Nitrofen ; Propinol ; Simazine ; Soil microflora
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A study was conducted to know the effect of four common herbicidesviz, Lasso, Nitrofen, Propinol, and Simazine on soil microorganisms in Red Sandy soil. In general the application of different herbicides did not adversely affect the microbial population. The bacterial population was decreased by the application of propinol and nitrofen. Simazine and lasso stimulated the fungal population. The stimulation in Azotobacter population was observed in lasso, nitrofen and simazine treated soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02185588
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Nitrogen fixation and nitrogen balance studies in Rhizobium-VA mycorrhiza inoculated legume-grass association by15N isotope dilution technique under a field condition (1988)
    Springer
    Plant and soil 111 (1988), S. 11-16 
    Details
    ISSN: 1573-5036
    Keywords: buffel grass ; 15N ; N balance ; N2 fixation ; Rhizobium ; siratro ; VA mycorrhiza
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A mixed pasture comprising of buffel grass and a legume siratro was studied under field condition for a two-year period to know the fodder yield increase, nitrogen fixation and nitrogen balance with and without the inoculation of VA mycorrhiza to grass and Rhizobium to legume component.15N dilution technique was followed using labelled ammonium sulphate. The data showed that during the first year of the above study combined inoculation of VA mycorrhiza and Rhizobium to grass and legume respectively significantly increased the total dry matter (DM) (23,900 kg ha−1 yr−1) and total N content (308 kg ha−1 yr−1) of the mixed pasture over the uninoculated mixture. However, the above increase due to combined inoculation was maximum during second year with respect to DM yield (28,200 kg ha−1 yr−1), but the total N harvested through grass-legume mixture was comparatively lower than the first year (297 kg ha−1 yr−1). The amount of biologically fixed N was highest in the first year (79 kg ha−1 yr−1) and showed a very drastic reduction at the end of second year (39 kg ha−1 yr−1). A positive nitrogen balance was observed in the grass-legume mixture irrespective of inoculation of VA mycorrhiza and/or Rhizobium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182031
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Chemotaxis ofRhizobium sp. Towards root exudate ofCicer Arietinum L. (1978)
    Springer
    Plant and soil 50 (1978), S. 553-566 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Root exudate from seedlings ofCicer arietinum L. was collected in a chamber under aseptic conditions. The exudate was fractionated into anion, cation and neutral fractions. The anionic fraction was made up of galacturonic acid, gluconic acid, mannuronic acid and two unidentified compounds withR f values 0.56 and 0.62. The cationic fraction contained alanine, arginine, aspartic acid, cystine, glycine, histidine, isoleucine, leucine, lysine and serine. The neutral fraction was made up of arabinose, galactose, glucose, ribose and xylose. The amino acids contributed to the bulk of the root exudate. The ratio of anionic, cationic and neutral fraction was 1∶7∶2. The crude root exudate was tested for its chemotactic ability using the capillary tube method. It was highly chemotactic for theRhizobium sp. The individual fractions and their various combinations were tested for chemotaxis. The chemotactic response of the Cicer strain of Rhizobium was least with anionic fraction most with cationic fraction and intermediate with neutral fraction. Maximum chemotactic response among the fractional combinations was obtained with all the three fractions and least with cationic plus neutral factions. Individual compounds constituting the various fractions were also tried for their ability to elicit chemotactic response. The organism exhibited maximum positive chemotactic response to histidine and negative response to alanine among the amino acids and to glucose and gluconic acid among the sugars and sugar acids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02107208
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Chemotaxis ofRhizobium sp. Towards root exudate ofCicer Arietinum L. (1978)
    Springer
    Plant and soil 50 (1978), S. 553-566 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Root exudate from seedlings ofCicer arietinum L. was collected in a chamber under aseptic conditions. The exudate was fractionated into anion, cation and neutral fractions. The anionic fraction was made up of galacturonic acid, gluconic acid, mannuronic acid and two unidentified compounds withR f values 0.56 and 0.62. The cationic fraction contained alanine, arginine, aspartic acid, cystine, glycine, histidine, isoleucine, leucine, lysine and serine. The neutral fraction was made up of arabinose, galactose, glucose, ribose and xylose. The amino acids contributed to the bulk of the root exudate. The ratio of anionic, cationic and neutral fraction was 1∶7∶2. The crude root exudate was tested for its chemotactic ability using the capillary tube method. It was highly chemotactic for theRhizobium sp. The individual fractions and their various combinations were tested for chemotaxis. The chemotactic response of the Cicer strain of Rhizobium was least with anionic fraction most with cationic fraction and intermediate with neutral fraction. Maximum chemotactic response among the fractional combinations was obtained with all the three fractions and least with cationic plus neutral factions. Individual compounds constituting the various fractions were also tried for their ability to elicit chemotactic response. The organism exhibited maximum positive chemotactic response to histidine and negative response to alanine among the amino acids and to glucose and gluconic acid among the sugars and sugar acids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02107208
    Location Call Number Expected 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...