ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
    Journal of the American Chemical Society 104 (1982), S. 3752-3754 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] A major concern in cancer therapy is resistance of tumors such as glioblastoma to current treatment protocols. Here, we report that transfer of the gene encoding second mitochondria-derived activator of caspase (Smac) or Smac peptides sensitized various tumor cells in vitro and malignant glioma ...
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archiv der Mathematik 65 (1995), S. 107-110 
    ISSN: 1420-8938
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Archiv der Mathematik 68 (1997), S. 89-99 
    ISSN: 1420-8938
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract. A new algorithm to calculate the conjugacy classes of subgroups of index p and p 2 of a p-group is presented. It uses a surprising relation between the commutator subgroup of a p-group and linear algebra. The algorithm is by magnitudes faster and uses much less memory than the usual “Neubüser-Felsch” algorithm. However, it is restricted to this special case.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1436-5073
    Keywords: atrazine ; terbuthylazine ; sequential binding ; kinetics ; cross-reactivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Immunoassays for triazine herbicides were tested for their reaction to the variation of the tracer incubation time. By application of a sequential technique the measuring range of atrazine could be expanded to five decades and the total duration of the test could be reduced to about 30 min. In an optimized version a lower detection limit of 9 pmol/l (2 ng/l) was achieved. The detection limit of a sensitive immunoassay for terbuthylazine is also below the concentration limit demanded of the German drinking water regulation (100 ng/l) and reaches 130 pmol/l (30 ng/l). Short tracer incubation times did not lead to increased cross-reactivities in contrast to theoretical models [1, 2]. Different mechanisms, which could cause a shift of the center point of the calibration curve, are discussed, including kinetic considerations.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 292 (1998), S. 435-445 
    ISSN: 1432-0878
    Keywords: Key words p53 ; Apoptosis ; Chemotherapy ; Cell cycle ; Differentiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract  Loss of wild-type p53 activity is thought to be a major predictor of failure to respond to radiotherapy and chemotherapy in various human cancers. This assumption is largely based on some cell-death studies in p53-knockout mice and on correlations of p53 status assessed by immunochemistry or single-strand conformational polymorphism (SSCP) analysis, and responses to therapy in human cancers in vivo. In principle, p53 may enhance chemosensitivity by promoting apoptosis via transcription-independent mechanisms as well as transcriptional activation of proapoptotic genes such as bax and transcriptional repression of antiapoptotic genes such as bcl-2. Drug-induced suicide mediated by the CD95/CD95 ligand system may also involve a p53-controlled pathway. Yet, p53 may decrease chemosensitivity by promoting p21-mediated and p21-independent growth arrest, DNA repair, and differentiation, and by enhancing the transcription of antiapoptotic genes such as bcl-x. Cell-culture work indicates that the effects of altering the p53 status on chemosensitivity depend very much on the cellular context. Disruption of p53 function in otherwise normal, nonneoplastic cells may enhance rather than decrease chemosensitivity. However, targeted p53 gene disruption in some cell types obtained from p53-knockout mice results in enhanced rather than decreased sensitivity, e.g., to irradiation. Transformed cells that have retained wild-type p53 function tend to acquire chemoresistance when p53 function is disabled, with few exceptions. Thus, preexisting molecular alterations or consecutive accumulation of molecular alterations after loss of p53 rather than the loss of wild-type p53 activity per se may confer chemoresistence to tumor cells. Moreover, p53 accumulation resulting from the increased half-life of mutant p53 proteins can act as a gain-of-function mutation, presumably as a consequence of multiple protein-protein interactions. Finally, significant tumor cell-type- and drug-specific patterns of modulation of chemosensitivity by p53 are beginning to emerge. Transfer of wild-type p53 genes into tumor cells commonly induces growth arrest but may render these cells relatively more resistant to most chemotherapeutic drugs. Therefore, careful experimental in vitro and in vivo studies are required before chemotherapy-supported p53 gene therapy for human cancer is introduced into clinical practice.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Antitumor Active cis-Platinum(II) Complexes with α-Amino Acid Esters and Peptide Esters. X-Ray Structure of cis-Dichlorobis(glycylglycine ethyl ester)platinum(II)A series of cis-platinum(II) complexes X2PtL2 (1-4) (X = halide, 2X = oxalate, malonate; L = α-amino acid ester, peptide ester) has been obtained from Pt42- and L. The dipeptide ester complexes are also accessible via peptide synthesis at the complex from Cl2Pt(NH2CHRCO2H)2 and α-amino acid esters using carbodiimide as coupling agent and the platinum atom as amino protecting group. The complexes Cl2PtL2 with α-amino acid ester ligands have also been prepared from the bis(chelate) compounds cis-Pt(NH2CHRCO2)2 and alcohol in the presence of HCl. The complexes have been characterized by their spectroscopic data, cis-Cl2Pt(GlyGlyOEt)2 (2a) by an X-ray analysis.
    Notes: Eine Reihe von cis-Platin(II)-Komplexen X2PtL2(1-4) (X = Halogenid, 2X = Oxalat, Malonat; L = α-Aminosäureester, Peptidester) wird aus PtX42- und L erhalten. Entsprechende Komplexe mit Dipeptidester-Liganden sind auch durch Peptidsynthese am Komplex aus Cl2Pt-(NH2CHRCO2H)2 und α-Aminosäureestern mit Carbodiimid als Kupplungskomponente und Platin als Aminoschutzgruppe zugänglich. Die Verbindungen Cl2PtL2 mit α-Aminosäureester-Liganden lassen sich auch aus den Bis(chelat)-Komplexen cis-Pt(NH2CHRCO2)2 und Alkohol in Gegenwart von HCl gewinnen. Die cis-Struktur der Verbindungen wurde spektroskopisch, die von Cl2Pt(GlyGlyOEt)2 (2a) durch Röntgenstrukturanalyse nachgewiesen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chiral Dicarbonyl(η5-cyclopentadienyl) Complexes of Molybdenum and Tungsten with Anions of α-Amino AcidsA series of chiral complexes (η5-C5H5)M(CO)2(L-L′) (M = Mo, W; L-L′ = Gly-O, Sar-O, Me2Gly-O, L-Ala-O, 2-Me-L-Ala-O, L-Val-O, L-Ser-O, L-Thr-O, L-His-O, L-Phe-O, Bzl-L-Phe-O, L-Pro-O, S-Me-L-Cys-O, L-Lys-O, L-Glu-O, L-Cys-O, L-Pen-O) (1a-t, 2a, b, 3, 4) has been prepared and spectroscopically characterized. The diastereomers can be distinguished by their 1H and 13C NMR spectra. They are configurationally stable in solution. The sarcosinato complex 1b can be resolved into the diastereomeric pairs of enantiomers. In alkaline medium a rapid equilibrium of the diastereomers (1:1) is obtained due to isomerization at the coordinated N-atom. The structure of the DL-serinato complex 1i has been determined by X-ray analysis. The unit cell contains two pairs of enantiomers (RMoRC and SMoSC).
    Notes: Eine Reihe von chiralen Komplexen (η5-C5H5)M(CO)2)(L-L′) (M = Mo, W; L-L′ = Gly-O, Sar-O, Me2Gly-O, L-Ala-O, 2-Me-L-Ala-O, L-Val-O, L-Ser-O, L-Thr-O, L-His-O, L-Phe-O, Bzi-L-Phe-O, L-Pro-O, S-Me-L-Cys-O, L-Lys-O, L-Glu-O, L-Cys-O, L-Pen-O) (1a-t, 2a, b, 3, 4) wurde dargestellt und spektroskopisch charakterisiert. Die Diastereomeren lassen sich durch ihre 1H- und 13C-NMR-Spektren unterscheiden. Sie sind in Lösung konfigurationsstabil. Der Sarkosinato-Komplex 1b läßt sich in die diastereomeren Enantiomerenpaare trennen. In alkalischem Medium stellt sich infolge Isomerisierung am koordinierten N-Atom das Diastereomerengleichgewicht 1:1 ein. Die Struktur des DL-Serinato-Komplexes 1i wurde röntgenographisch bestimmt. Die Elementarzelle enthält zwei Enantiomerenpaare (RMoRC und SMoSC).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 354 (1996), S. 352-358 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An immunological method for the determination of triazine herbicides covalently bound to soil humic acids has been developed. A sandwich-immunoassay has been performed, based on both polyclonal humic acid-antibodies and monoclonal triazineantibodies. A peroxidase-labelled third antibody has been used for the photometric detection. A triazine-humic acid conjugate served as calibration standard. The coupling density for this conjugate has been determined by measuring the difference of free amino groups both with ninhydrin and with the trinitrobenzene sulfonic acid method. In addition, the coupling density has been confirmed by scintillation counting using a 14C-atrazine derivative. Due to nonspecific interactions between antibody proteins and humic acids, different blocking steps had to be performed. Finally, the assay has been applied to a triazine contaminated soil sample. Humic acids (including bound residues) have been extracted by diluted sodium carbonate solution. Concentrations of bound atrazine residues have been found in the range of 2 mg/kg soil on fields where triazine herbicides has been applied over a period of 21 years. These results are comparable to both the applied amount and the nonextractable fraction.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 97 (1985), S. 1076-1076 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...