Browsing by Author "Efremova, Nadejda"

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    THE APPLICATION OF SOME COORDINATION COMPOUNDS IN REGULATION OF THE CONTENT OF ANTIOXIDANTS IN SPIRULINA PLATENSIS
    (CEP USM, 2023-02-13) Bulimaga, Valentina; Efremova, Nadejda; Zosim, Liliana; Batir, Ludmila; Elenciuc, Daniela
    This paper reports on the study of possibility of utilization of some coordination compounds of V(IV) and Co(III) as regulators of the content of bioactive substances with antioxidant properties: superoxiddismutase (SOD), phycobiliproteins, carotenoids and lipids in the biomass of cyanobacteria Spirulina platensis.
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    THE EFFECTS OF SOME COMPOUNDS OF Mn(II) AND Zn(II) ON THE MULTIPLICATION OF WINE YEAST AND BIOSYNTHESIS OF CARBOHYDRATES IN THE BIOMASS
    (University of Oradea Publishing House, 2010) Usatîi, Agafia; Chiselita, Oleg; Rudic, Valeriu; Chiselita, Natalia; Molodoi, Elena; Efremova, Nadejda; Gulea, Aurelian; Turta, Constantin; Lozan, Vasile
    The aim of investigation was to establish the influence of sulphates, acetates and coordination compounds of Mn(II) and Zn(II) as stimulators of the multiplication and growth of wine yeasts strain Saccharomyces cerevisiae CNMN-Y-20 and inducers of carbohydrate biosynthesis in biomass with the following elaboration of new procedures for directed carbohydrate biosynthesis. The study has been revealed that compounds MnSO 4 •4H 2 O, [Mn 2 Ac(2PyTCH)-1,5-Bis(piridin)tiocarbohidrazid- dimanganese-acetate] and ZnLP-2 in optimal concentrations can be recommended as effective regulators of the yeast Saccharomyces cerevisiae CNMN-Y-20 multiplications, as well as compounds [Mn(Gly) 2 ]Cl 2, (CH 3 COO) 2 Zn and ZnLP-2 in established concentrations - of the carbohydrates biosynthesis in the biomass of studied wine yeast strain. Stimulatory properties of studied compounds of Mn 2+ and Zn 2+ on carbohydrate biosynthesis in biomass of Saccharomyces cerevisiae CNMN-Y-20 can be explained both by the action of metal and by the nature of the ligand. The obtained biomass of wine yeast strain with high content of carbohydrates can be utilized for the obtaining of new bioproducts with the following application in the field of medicine and cosmetology.
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    MODIFICAREA COMPONENŢEI CALITATIVE A PROTEINELOR LA CIANOBACTERIA SPIRULINA PLATENSIS CULTIVATĂ ÎN PREZENŢA UNOR COMPUŞI COORDINATIVI AI CR(III)
    (CEP USM, 2008) Rudic, Valeriu; Bulimaga, Valentina; Ciumac, Daniela; Zosim, Liliana; Chiriac, Tatiana; Efremova, Nadejda
    SDS-electrophoresis of polypeptide chains of total protein fraction obtained from Spirulina cultivated in the presence of Cr(III) coordination compounds have been carried out. New bands with apparent molecular mass 60, 4 kDa and 66, 7 kDa have been detected in the presence of Cr(III) coordination compounds.
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    PROCEDEE DE OBŢINERE ŞI PURIFICARE A NOILOR PREPARATE ANTIOXIDANTE DE ORIGINE PROTEICĂ DIN BIOMASA CIANOBACTERIEI SPIRULINA PLATENSIS
    (2009) Efremova, Nadejda; Reva, Veaceslav; Bulimaga, Valentina; Gulea, Aurelian; Chiriac, Tatiana; Rudic, Valeriu
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    VALORIZATION OF WINE YEAST SEDIMENTS AS A SOURCE OF LIPID PREPARATIONS
    (CEP USM, 2022-09-29) Tofan, Elena; Chiselița, Natalia; Chiselița, Oleg; Beșliu, Alina; Efremova, Nadejda