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
Filter
  • Biochemistry and Biotechnology  (13)
  • reservoirs  (2)
  • 1995-1999  (15)
  • 1
    Electronic Resource
    Electronic Resource
    Aquatic macrophyte distribution in relation to water and sediment conditions in the Itaipu Reservoir, Brazil (1999)
    Springer
    Hydrobiologia 415 (1999), S. 147-154 
    Details
    ISSN: 1573-5117
    Keywords: freshwater macrophytes ; reservoirs ; South America ; aquatic weeds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Aquatic macrophyte community distribution along the eastern shoreline of the Itaipu Reservoir (one of the South America's largest impoundments) is described in relation to limnological and sedimentological factors. The central body of the reservoir is mesotrophic, while the arms (flooded influent river valleys) along the eastern shore may be oligo-mesotrophic to eutrophic, depending on time of year and sub-catchment characteristics. Macrophyte community composition and species cover were surveyed at 30 sites in four arms, in relation to sediment total P and organic matter; underwater light regime; and water total P and Kjeldahl N concentration, alkalinity, conductivity, depth and pH. Seventeen euhydrophyte and six emergent macrophyte species were recorded. Large stands of Egeria najas dominated the euhydrophyte vegetation, together with free-floating weed species (Pistia stratiotes Linn., Salvinia auriculata Aublet and Eichhornia crassipes (Mart.) Solms.). Canonical Correspondence Analysis of the data showed that two sets of variables were important predictors of aquatic macrophyte community structure. Floating macrophyte assemblage was closely related to concentration of nutrients in both water and sediment, while light penetration was the strongest predictor of submerged species occurrence. Although a large number of potential nuisance species were present, dense growths were restricted to shallower areas of the Itaipu Reservoir, causing localised problems. The possibility of increasing interference by these plants with fisheries, recreational use, transport and hydroelectricity generation suggests a need for continued monitoring of weed distribution and abundance, and investigation of appropriate management measures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003856629837
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Spatial variation of zooplankton groups in a tropical reservoir (Broa Reservoir, São Paulo State-Brazil) (1997)
    Springer
    Hydrobiologia 357 (1997), S. 89-98 
    Details
    ISSN: 1573-5117
    Keywords: zooplankton ecology ; spatial variation ; reservoirs ; geostatistics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In this paper the spatial variation of zooplanktonic groups(cladocerans, rotifers, nauplii and adults of copepods) in the Broareservoir was studied using geostatistical tools. The variation inthe density of cladocerans and nauplii and adults of copepods isstructured along the geographic space in the form of gradients, whichimplies the rejection of the hypothesis of spatial homogeneity andrandomness. In other words, the variation in the density of thesegroups is not distributed randomly over the geographic space. Thepatterns of spatial variation observed can be attributed to differentfactors (advection, behavioral mechanisms and limnological factors).The last conclusion is congruent with the multiple forces hypothesis(Pinel-Alloul, 1995; Pinel-Alloul et al., 1995). Implications tosampling methodology are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003178618304
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Repetitive treatment with serotonin modifies protein synthesis and protein phosphorylation in the central nervous system of Hirudo medicinalis (1995)
    Weinheim : Wiley-Blackwell
    Electrophoresis 16 (1995), S. 1251-1254 
    Details
    ISSN: 0173-0835
    Keywords: Serotonin ; Protein synthesis ; Phosphorylation ; Leech ; Two-dimensional polyacrylamide gel electrophoresis ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Serotonin (5HT) is the neurotransmitter involved in some forms of short-term memory in the leech. Behavioral experiments have demonstrated that long-term memory requires new protein synthesis. With the aim of studying the molecular mechanism underlying memory processes in the leech, we have analyzed the effect of 5HT on protein synthesis and protein phosphorylation. Segmental ganglia of the leech central nervous system haves been labeled, proteins have been separated by two-dimensional-electrophoresis and labeled proteins detected by autoradiography. Our findings indicate that repetitive treatment with 5HT produces either the persistence of phosphorylation or changes in protein synthesis in several proteins.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.11501601206
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Acute-phase proteins in perinatal human plasma (1997)
    Weinheim : Wiley-Blackwell
    Electrophoresis 18 (1997), S. 520-526 
    Details
    ISSN: 0173-0835
    Keywords: Acute-phase serum ; Neonate ; Haptoglobin ; Serum amyloid A protein ; Two-dimensional polyacrylamide gel electrophoresis ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Plasma from eight newborns (4 pre-term and 4 full-term) with early-onset (〈72 h) sepsis and six apparently healthy controls was analyzed. The presence of spots identified as haptoglobin and serum amyloid A protein was the electrophoretic result most consistently associated with disease. Time course monitoring showed rises, peaks and declines of spot intensity as expected for acute-phase proteins induced by transient stimuli. Haptoglobin β chains appear to be undersialated in pre-term newborns, whereas post-translational modifications of α chains and serum amyloid A protein are similar to those observed in adults. The undersialation of β chain and occurrence of α chain phenotypes different from those found in maternal serum indicate that perinatal haptoglobin originates from neonatal synthesis.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.1150180331
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Two-dimensional electrophoresis of thylakoid protein patterns in two wheat cultivars with different sensitivity to sulfur dioxide (1995)
    Weinheim : Wiley-Blackwell
    Electrophoresis 16 (1995), S. 1301-1304 
    Details
    ISSN: 0173-0835
    Keywords: Wheat ; Sulfur dioxide ; Thylakoids ; Two-dimensional polyacrylamide gel electrophoresis ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Plants of two wheat cultivars (Triticum aestivum L., cultivars Mec and Chiarano), differing in sensitivity towards sulfur dioxide, were fumigated with 96 nL L-1 of SO2 for four months. Thylakoid membranes were subjected to two-dimensional electrophoresis in order to detect possible changes in the protein patterns. We found the greatest alterations following treatment in the polypeptide profiles of the most sensitive cultivar, Mec, even if some significant changes were also detected in the plants of the cultivar Chiarano.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.11501601213
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Two-dimensional electrophoretic patterns of acute-phase human serum proteins in the course of bacterial and viral diseases (1996)
    Weinheim : Wiley-Blackwell
    Electrophoresis 17 (1996), S. 612-616 
    Details
    ISSN: 0173-0835
    Keywords: Two-dimensional electrophoresis ; Serum proteins ; Acute phase ; Infectious diseases ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Acute-phase serum proteins were analyzed by two-dimensional electrophoresis with isoelectric focusing in 3-10 immobilized pH gradients. Most spots were identified by reference to the plasma map in the SWISS-2DPAGE database. Serum amyloid A protein spots were identified by immunoblotting with specific antiserum and by matching determined with predicted values of electrophoretic parameters. Changes in the concentrations of α1-antitrypsin, leucinerich glycoprotein, haptoglobin, serum retinol-binding protein and transthyretin were quantitated by densitometry of silver-stained gels. Electrophoretic patterns from 18 patients with bacterial diseases and 16 patients with viral diseases were compared. The incidence of serum amyloid A protein spots was 18/18 in bacterial diseases and 6/16 in viral diseases. As for the other reactants studied, variations were simultaneous in bacterial disease and tended to be staggered in viral diseases.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.1150170333
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Two-dimensional gel electrophoresis of Caenorhabditis elegans homogenates and identification of protein spots by microsequencing (1997)
    Weinheim : Wiley-Blackwell
    Electrophoresis 18 (1997), S. 557-562 
    Details
    ISSN: 0173-0835
    Keywords: Caenorhabditis elegans ; Two-dimensional polyacrylamide gel electrophoresis ; Microsequencing ; Protein maps ; Immobilized pH gradient ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Employing isoelectric focusing on immobilized pH gradients followed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) we have obtained a map of C. elegans proteins, from a mixed culture containing all developmental stages, presenting over 2000 spots within the window of isoelectric points (pI) 3.5-9 and a molecular mass of 10-200 kDa. Edman microsequencing yielded successful results in 12 out of 24 analyzed spots. All but one of the N-terminal sequences retrieved C. elegans sequences in cosmid and/or expressed sequence tag clones. Structurally related protein sequences found in data banks included enzymes in energy metabolism (cytochrome oxydase, ATP synthase, enolase), a fatty acid-binding protein, a translationally controlled tumor protein, an unknown C. elegans protein, an acidic ribosomal protein, a titin-like protein, a G-protein β chain, cyclophilin, and cathepsin D. Experimental determination of N-termini allowed us to define sites of signal cleavage providing further information on the physiological role of the newly found C. elegans proteins. This report demonstrates the possibility of two-dimensional gel electrophoresis and Edman microsequencing in the elucidation of C. elegans proteome.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.1150180337
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Charge heterogeneity of macrophage migration inhibitory factor (MIF) in human liver and breast tissue (1998)
    Weinheim : Wiley-Blackwell
    Electrophoresis 19 (1998), S. 2010-2013 
    Details
    ISSN: 0173-0835
    Keywords: Breast biopsy ; Two-dimensional polyacrylamide gel electrophoresis ; Macrophage migration inhibitory factor ; Liver biopsy ; Breast cell line ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Macrophage migration inhibitory factor (MIF) is an ubiquitous protein playing various immunological and hormonal roles. Theoretical electrophoretic coordinates calculated from protein sequence in the SWISS-PROT database (AC P14174) are 12 kDa and pI 8.24. Using two-dimensional (2-D) immunoblotting, we have detected isoelectric forms at ca. 11.9 kDa, with pI values of 7.8 and 6.98 in human liver tissue, breast tissue and a cell line and in preparations of human MIF expressed in E. coli. This evidence suggests that MIF charge heterogeneity originates from a post-translational modification not requiring euka-ryote-specific enzymes. We have also detected in human liver a minor immunoreactive spot at pI 6.23, which coincides with the MIF spot in the liver map in SWISS-2DPAGE. The pI 6.23 isoform also conceivably derives from post-translational modification, as MIF is known to be encoded in the human genome by a single copy gene.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.1150191120
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Mapping of Chlamydia trachomatis proteins by Immobiline-polyacrylamide two-dimensional electrophoresis: Spot identification by N-terminal sequencing and immunoblotting (1996)
    Weinheim : Wiley-Blackwell
    Electrophoresis 17 (1996), S. 185-190 
    Details
    ISSN: 0173-0835
    Keywords: Chlamydia ; Two-dimensional polyacrylamide gel electrophoresis ; Protein maps ; Immobilized pH gradient ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Proteins from purified elementary bodies of Chlamydia trachomatis were separated by two-dimensional gel electrophoresis on nonlinear wide-range immobilized pH gradients in the first dimension and polyacrylamide gradient gels in the second dimension. The maps obtained with this system are highly reproducible and resolve ca. 600 spots. By using immunoblot analysis with specific antibodies and/or N-terminal amino acid sequencing, we established the positions of a number of described chlamydial proteins, such as the major outer membrane protein (MOMP) the 60 kDa cystein-rich outer membrane protein (OMP2), the DnaK-like, GroEL-like, and macrophage infectivity potentiator (MIP)-like proteins, the plasmid-encoded pgp3 protein, two ribosomal proteins (S1 and L7/L12), and the protein-elongation factor EF-Tu. Other proteins, for which gene assignment was not possible, have been identified by three parameters (Mr, pI and N-terminal sequence). This work provides a preliminary basis for a future and progressive compilation of a genome-linked database of chlamydial proteins.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.1150170130
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Two-dimensional electrophoresis of human serum proteins modified by ampicillin during therapeutic treatment (1995)
    Weinheim : Wiley-Blackwell
    Electrophoresis 16 (1995), S. 1190-1192 
    Details
    ISSN: 0173-0835
    Keywords: Two-dimensional polyacrylamide gel electrophoresis ; Immunoblotting ; Serum proteins ; Ampicillin ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Two-dimensional electrophoretograms of serum proteins from ampicillintreated patients were analyzed by immunoblotting with an antiserum specific for penicilloyl groups. As expected, human serum albumin (HSA) was the main ampicilloylated serum component. Transferrin main form II was found to be the second most important component as regards immunoblotting intensity. Immunoreactive spots were present on the acidic side of the transferrin isoelectric series, suggesting a modification mechanism similar to that observed in HSA, i.e., acylation of basic amino acid residues. Several additional ampicilloylated spots were detected but could not be assigned. Their electrophoretic parameters were determined using internal standards. This is the first description of serum proteins other than HSA being modified by ampicillin in the course of routine therapeutic treatment.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.11501601198
    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...