Browsing by Author "EFREMOVA, Nadejda"

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  • Agri-food wastes as an efficient substrate for the pigmented yeast cultuvation 
    CHISELIȚA, Natalia; CHISELIȚA, Oleg; EFREMOVA, Nadejda; TOFAN, Elena; ROZLOVAN, Ana; ȚÎBÎRNAC, Evelina (Technical University of Moldova, 2026)
    Agri-food wastes represent an increasingly acute global problem, with approximately one billion tons generated worldwide each year. In addition to the high costs associated with its management, it also creates serious ...
  • Antioxidant anthocyanin extract and obtaining process from waste yeast biomass from wine industry 
    CHISELIȚA, Oleg; CHISELIȚA, Natalia; TOFAN, Elena; BEȘLIU, Alina; EFREMOVA, Nadejda; SPRINCEAN, Ana; DANILIȘ, Marina (CORNELIUGROUP research-innovation Association, 2022)
    According to the invention, an anthocyanin extract is proposed, which is obtained by thawing the yeast biomass from winery waste, homogenizing the suspension and autolysis at +45˚C for 8 hours or autolysis at +45˚ C for 8 ...
  • Antioxidant extracts based on natural pigments 
    BEŞLIU, Alina; CHISELIȚA, Natalia; CHISELIȚA, Oleg; EFREMOVA, Nadejda; TOFAN, Elena; RUDIC, Valeriu (Universitatea "Dunărea de Jos" din Galaţi, 2023)
    The invention relates to microbial biotechnologies, specifically to obtaining of new antioxidant extracts based on pigments from Arthrospira platensis cyanobacteria biomass, a residue from the production of the BioR remedy. ...
  • Aplicarea principiilor designului UX/UI în asigurarea funcționalității site-lor web comerciale 
    EFREMOVA, Nadejda (Universitatea Tehnică a Moldovei, 2021)
    Tendințele actuale în comerțul online interacțuinează direct cu UX/UI design în procesul de dezvoltare site-lor. Web design rezolvă o multitudine de sarcini într-o largă varietate de domenii, contribuie la îmbunătățirea ...
  • Biochemical composition and antioxidant activity of different preparations from microbial waste of the beer industry 
    CHISELIȚA, Natalia; CHISELIȚA, Oleg; BEȘLIU, Alina; EFREMOVA, Nadejda; TOFAN, Elena; SPRINCEAN, Ana; DANILIȘ, Marina; ROTARI, Doina; ROTARU, Ana (2022)
    The purpose of this research was to evaluate the biochemical composition and antioxidant activity of different natural preparations obtained from the yeast biomass of beer industry waste. It was found that the preparations ...
  • Biologically active preparation based on yeast biomass from the waste of beer industry 
    CHISELIȚA, Natalia; CHISELIȚA, Oleg; BEȘLIU, Alina; EFREMOVA, Nadejda; TOFAN, Elena; LOZAN, Ana; DANILIȘ, Marina (Technical University "Gheorghe Asachi" of Iași, 2021)
    Invenția se referă la domeniul ecologiei și biotehnologiei microbiene, în special la producerea unui preparat natural biologic activ din biomasa levurilor din deșeurile in-dustriei de bere, care poate fi utilizat în sectorul ...
  • Biologically active preparation based on yeast biomass from the waste of beer industry 
    CHISELIȚA, Natalia; CHISELIȚA, Oleg; BEȘLIU, Alina; EFREMOVA, Nadejda; TOFAN, Elena; LOZAN, Ana; DANILIȘ, Marina (CORNELIUGROUP research-innovation Association, 2021)
    The invention relates to the field of ecology and microbial biotechnology, in particular to the production of a biologically active natural preparation from yeast biomass from the beer industry wastes which can be used in ...
  • Catalase activity of fungal strains from the genera Penicillium, Aspergillus, and Trichoderma 
    MOLDOVAN, Cristina; SÎRBU, Tamara; BÎRSA, Maxim; EFREMOVA, Nadejda (Technical University of Moldova, 2026)
    The catalase activity of fungi is particularly important, playing an essential role in protecting cells against oxidative stress by decomposing hydrogen peroxides. This enzyme contributes to maintaining cellular homeostasis ...
  • Drojdiile din genul Saccharomyces surse de perspectivă pentru obţinerea ergosterolului 
    MOLODOI, Elena; USATÎI, Agafia; EFREMOVA, Nadejda; CHIRIŢA, Elena; FULGA, Ludmila (Tehnica UTM, 2012)
    În lucrare sunt prezentate studiile morfologice, fiziologice,culturale ale tulpinilor de drojdie producenţi de ergosterol (provitamina D).
  • Effect of alternative nutrient media on biomass and antioxidant status of Saccharomyces cerevisiae strains 
    MAGAZ, Pavel; CHISELIȚA, Natalia; CHISELIȚA, Oleg; EFREMOVA, Nadejda; TOFAN, Elena; ROZLOVAN, Ana; ȚÎBÎRNAC, Evelina (Technical University of Moldova, 2026)
    Saccharomyces cerevisiae baker’s yeasts represent a promising platform for bakery biotechnology, particularly when cultivated using nutrient media derived from wastes such as fruit and vegetable peels. These low-cost ...
  • Evaluation of the biochemical composition and antioxidant activity of preparation based on pigments extracted from the remaining biomass of Arthrospira platensis 
    BEȘLIU, Alina; CHISELIȚA, Oleg; CHISELIȚA, Natalia; EFREMOVA, Nadejda; CHIRIAC, Tatiana (Page Press Publications, 2023)
    Biotechnological research is currently focused on obtaining preparations based on natural pigments due to their properties and positive impact on human and animal health. Thus, this study aimed to evaluate the biochemical ...
  • Evaluation of yeast strains for biostimulant potential applications 
    EFREMOVA, Nadejda; TOFAN, Elena; CHISELIȚA, Natalia; CHISELIȚA, Oleg; ȚÎBÎRNAC, Evelina; ROZLOVAN, Ana (Technical University of Moldova, 2026)
    The intensification of global agricultural production in response to a rapidly growing population has led to extensive reliance on synthetic fertilizers and pesticides, which, despite their short-term agronomic efficacy, ...
  • Extraction processes and biologically active preparations obtained from brewer’s yeast sediments for use in the animal husbandry 
    BESHLIU, Alina; CHISELIȚA, Natalia; CHISELIȚA, Oleg; EFREMOVA, Nadejda; TOFAN, Elena; SPRINCEAN, Ana; DANILIS, Marina; PIRLOG, Alisa; CARAPIREA, Anatol; DARIE, Grigore; CIBOTARU, Elena; MATVIENCO, Natalia (2022)
    The purpose of this research was to develop extraction processes and obtain biologically active preparations based on the sediments of brewer’s yeast for application in the livestock sector. Following the fractional ...
  • Influence of complex microbial preparation on productivity and clinical haematological status of rabbits kits 
    MACARI, Vasile; CHISELIȚA, Oleg; ROTARU, Ana; CHISELIȚA, Natalia; EFREMOVA, Nadejda; MAȚENCU, Dmitrii (University of Agronomic Sciences and Veterinary Medicine of Bucharest, 2024)
    The research aimed to study the influence of a bioactive compex microbial product, obtained from yeast biomass from beer and wine industry wastes and residual cyanobacterial biomass (spirulina) after production of medicinal ...
  • Influence of complex microbial preparation on productivity and clinical haematological status of rabbits kits 
    MACARI, Vasile; CHISELIȚA, Oleg; ROTARU, Ana; CHISELIȚA, Natalia; EFREMOVA, Nadejda; MAȚENCU, Dmitrii (Technical University "Gheorghe Asachi" of Iași, 2024)
    The invention relates to animal husbandry, in particular to a method of increasing the productive potential of rabbit kits. The technical result is conditioned by the use of the biologically active microbial preparation ...
  • Mediu de protecție pentru conservarea prin refrigerare a spermei de berbeci 
    ROTARI, Doina; DARIE, Grigore; MAȘNER, Oleg; IURCU, Iulian; DJENJERA, Irina; BEȘLIU, Alina; CHISELIȚA, Natalia; CHISELIȚA, Oleg; EFREMOVA, Nadejda; TOFAN, Elena (Technical University "Gheorghe Asachi" of Iași, 2021)
    Invenţia se referă la zootehnie, veterinărie, în special la mediile de protecţie a spermei de berbeci, poate fi aplicată pentru diluarea, conservarea prin refrigerare, păstrarea materialului seminal. Rezultatul tehnic ...
  • Mediu de protecție pentru conservarea prin refrigerare a spermei de berbeci 
    ROTARI, Doina; DARIE, Grigore; MAȘNER, Oleg; IURCU, Iulian; DJENJERA, Irina; BEȘLIU, Alina; CHISELIȚA, Natalia; CHISELIȚA, Oleg; EFREMOVA, Nadejda; TOFAN, Elena (Agenţia de Stat pentru Proprietatea Intelectuală a Republicii Moldova (AGEPI), 2021)
    Invenția se referă la creșterea animalelor, medicina veterinară, în special la mediul de protecție pentru conservarea materialului seminal de berbec prin refrigerare și poate fi aplicată pentru păstrarea genofondului de ...
  • Metoda de hrănire a iepurilor tineri 
    CHISELIŢĂ, Oleg; MACARI, Vasile; CHISELIŢĂ, Natalia; ROTARU, Ana; MAŢENCU, Dmitri; EFREMOVA, Nadejda (Universitatea Tehnica din Cluj-Napoca, 2025)
    Invenția se referă la creșterea animalelor, în special la metoda de hrănire a iepurilor tineri care prevede includerea preparatului microbian complex în cantitate de 0,3 kg sau 0,9 kg la 100 kg de furaj în rația zilnică ...
  • Metodă de obţinere a pigmenţilor naturali din biomasa cianobacteriană 
    BEŞLIU, Alina; CHISELIŢA, Natalia; CHISELIŢA, Oleg; EFREMOVA, Nadejda; TOFAN, Elena; RUDIC, Valeriu (Agenţia de Stat pentru Proprietatea Intelectuală a Republicii Moldova (AGEPI), 2023)
    Scopul acestei lucrări a fost elaborarea extractelor antioxidante noi pe bază de pigmenţi cu conţinut înalt de β-caroten, luteină, clorofi lă a, activităte antioxidantă și enzimatică din biomasa Arthrospira platensis, ...
  • New method for obtaining the proteoglycan preparation 
    EFREMOVA, Nadejda; CHISELIȚA, Natalia; BEȘLIU, Alina; CHISELIȚA, Oleg; TOFAN, Elena; RUDIC, Valeriu (Universitatea "Dunărea de Jos" din Galaţi, 2023)
    The invention relates to the elaboration of a new process for obtaining of proteoglycan preparation with high content of sulfated polysaccharides from the remaining biomass of Arthrospira platensis from the production of ...

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