Introduction/purpose: This paper presents the results of several different research studies. The inbred lines ZPPL 146 and ZPPL 159 and the maize hybrids ZP 633, ZP 735, and ZP 737 are primarily intended for human and livestock nutrition. Their selection took about four decades. Methods: Spectral bands were registered using the method of resonant Raman spectroscopy of the leaves of inbred maize lines. These spectral bands indicate the conformational characteristics of not only carotenoid molecules but also other compounds (phosphate, gluten, and amide III) in the leaf. Results: A systematic examination of the inbred lines ZPPL 146 and ZPPL 159 and their maize hybrids ZP 633, ZP 735, and ZP 737 was performed in this paper. It was stated that the new inbred lines of corn, i.e. ZPPL 146 and ZPPL 159, are rich in carotenoids and yellow pigments. These lines also have significant quantities of other valuable bioactive compounds and good physical characteristics. The lines have an upright position of the top leaves and belong to the group of maize lines with significant characteristics of the photosynthetic model. They are resistant to high temperatures and are drought tolerant. Conclusion: This paper presents the relevant properties, characteristics and parameters of the new studied inbred maize lines that can be used in selection processes in the future. High-yielding and high-quality maize hybrids, i.e. ZP 633, ZP 735, and ZP 737, have been created from the mentioned inbred maize lines. They are recognizable by their qualities. The hybrid ZP633 is especially noteworthy for human consumption (children and the elderly). Further, from the agronomic-veterinary point of view, it is confirmed that the hybrids ZP 735 and ZP 737 are the most suitable for livestock feeding with the programmed use of corn silage. The relevant agronomic, morphological and nutritional properties of the maize hybrids ZP 633, ZP 735, and ZP 737 are also presented in this paper. The results regarding the grain structure and yield height for grain and silage for the hybrids ZP 677 and ZP 684, produced in Serbia and the countries of Southeastern Europe, are also given.
The Rulebook on microbiological purity criteria prescribes the criteria of microbiologicalpurity and the frequency of control of equipment, devices, utensils, work surfaces, work clothes andworkers' hands in food production and marketing as well as in facilities and means of transport thatcome in contact with food in which there is a risk of occurrence and the spread of infectious diseases.Food facilities, means of transport, items, accessories and equipment that come in contact with foodmust be regularly cleaned and disinfected to avoid any risk of contamination, and food and staffmust be under regular supervision. Food handling staff must maintain a high level of personalhygiene and be trained in terms of food hygiene requirements. The aim of the study was to determinethe state of microbiological purity in food production and marketing in facilities and means oftransport that come into contact with food. As the test material we used swab samples from thesurfaces of equipment, devices, utensils, work surfaces, work clothes and workers' hands originatingfrom facilities for the production and marketing of food, restaurants and other catering facilitiesserving food, facilities in the field of education and social protection (facilities for accommodatingpersons) and means of transport that come into contact with food. A total of 3393 samples wereexamined in the course of self-control and official control during 2017. For microbiologicalexamination of swab samples, standard BAS ISO methods were used. The percent of swab samplesthat did not satisfy the Rulebook on the criteria of microbiological purity in 2017 was 5.20%. Inrelation to the total number of samples tested, 4.70% of the samples were unsatisfactory due to anincreased number of microorganisms, and 1.40% due to an increased number of enterobacteriaceae.Pathogenic microorganisms Salmonella spp. and Listeria monocytogenes are not detected in anyswab sample. The largest percent of unsatisfactory samples was in the category "hands of foodhandlers" and amounted to 7.30%
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