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• Managing the relationship between natural spawning areas on unprotected floodplains and on protected man-made fishponds

  25-31

  Péter Varga

  Views:

  92

  The economic land management of unprotected floodplain areas is possible only if considered jointly with protected floodplain areas, for which facility fisheries provide a solution. One solution could be that a part of the natural fish increment of the spawning-grounds on unprotected floodplains be raised in protected side fishponds and then later sold. This kind of fishery utilization is also favourable from economic, conservationist and flood protection aspects.

• The composition of gluten proteins and their effect on the rheological properties of gluten

  124-129

  Csilla Uri

  Árpád Tóth

  Péter Sipos

  Mária Borbélyné Varga

  Zoltán Győri

  Views:

  194

  Wheat is the major cereal component of bread in the world and is grown worldwide. Of the cereals only the bread wheats – and less the triticale – includes storage proteins that play an important role in the performance of gluten. Proteins of gluten complex may be present in two classes:
  − low molecular weight (gliadin-) components, and
  − high molecular weight (glutenin-) components.
  Gliadins shown appreciable heterogenity and can be separated into 40-50 components with gel electrophoresis. The composition of gliadins is employable for the identification the wheat varieties and to investigate the varieties. In the decreasing electrophoretic mobility sequence may be distinguish α-, β-, γ- and ω-gliadins. A glutenin subunits may be include in two classes:
  − high molecular weight glutenin subunits (HMW-GS),
  − low molecular weight glutenin subunits (LMW-GS).
  Wheat varieties can be identified by glutenin and their quality selection is also possible. The gliadin’s polypeptides encoding genes are located on the short arm of chromosomes 1A, 1B and 1D, 6A, 6B and 6D. Genetic coding for HMW subunits is located on the long arms of chromosomes 1A, 1B and 1D, the LMW-GS are also located on chromosomes 1A, 1B and 1D (Glu-3 loci) near the gliadin-coding loci.
  Storage proteins affect the rheological properties of gluten by two factors:
  1. The quality and quantity of the protein components of the gluten complex,
  2. The interactions between the protein fractions.