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  • Researches on the quick method of sugar productivity evaluation
    26-29
    Views:
    63

    In a sugar factory it is necessary to be able to calculate very quickly the sugar productivity possible to obtain by processing the beet
    having a certain technological quality. That is the reason why, in the following lines, it is presented a very quick method used by the Institute of
    Alimentary Chemistry, the laboratory for sugar research and engineering, for such kind of quick calculations, but with a high theoretical and
    practical precision.

  • Examination of the usability of the MALDI-TOF method in sunflower genetic identity analyses
    33-38
    Views:
    147

    Economically, one of our most important crop is the sunflower. Regarding its production it is essential to use top quality seeds. As the conditions of seed certification and the certification parameters are regulated by laws and ordinances, it is highly important to farmers and seed producers to detect seeds of low quality or dubious origins.
    Nowadays, the examination of the cultivar homogenity of sunflower is based on a reference method of the International Seed Testing Association Rules International (ISTA), Chapter 8. This standard reference method uses ultrathin poliakrilamid isoelectric focusing gel electrophoresis (IEF-UTL, or simply IEF). With this work we have set out to compare the results of MALDI-TOF to the test results – used as reference results – achieved by this reference method. The aim is to develop a new, quick, cheap and reliable method. In this article I summarized the results of some of the experiments that will provide basis for my further work.
    During our previous experiments we have concluded that out of four extracting agents we can get the most protein markers using NaCl acid buffer, 1 propanol buffer.

  • The study of headspace sampling for the measurement of Volatile Organic Compounds byGC-MS
    35-38
    Views:
    100

    Headspace sampling was studied for GC-MS measurements. A quick, direct method was developed for the measurement of petrol, gasoline and volatile organic solvent contamination of soil. According to our results this method is suitable for quick qualitative analysis of VOC contamination of soil, and helps to make decisions about further measurements. We concluded that an accurate quantitative measurement is not possible.

  • Large Scale Measurement of the Total Antioxidant Capacity of Different hungaricum Fruit and Vegetable Samples with Photochem Chemiluminometric Device
    300-304
    Views:
    77

    In our present study, we performed a quick test of the antioxidant capacity of domestic fruit and vegetable cultivars with a PHOTOCHEM® instrument (Analytik Jena AG, Germany). The instrument is special because it can measure both the total lipid-soluble antioxidant capacity (ACL method) and the total water-soluble antioxidant capacity. Another advantage of the system is its quick measurement. With similar instruments, such measurement can take several hours, while PHOTOCHEM® can perform it within a few minutes.
    In our model studies, we examined the changes in the antioxidant capacity of sour cherry, green pepper, carrot, pumpkin, red beet and Brassica sp. cultivars. We aimed to determine how suitable the instrument is for quick, routine measurements in the case of the different horticultural products and which species have high antioxidant capacity values.
    On the basis of our examinations, we can state that the PHOTOCHEM® system is suitable for routine, semi-automated measurements of the total antioxidant capacity at several vegetables and fruits. Besides this, the system can be used for testing the quality of food products, for monitoring storability in post-harvest technologies, and for special breeding programmes and for physiological and biotechnological studies.