Repozitoriul Instituțional al Universității de Stat din Moldova (RI USM)

Institutional Repository of Moldova State University (IR MSU)

Repozitoriul Instituțional al Universității de Stat din Moldova reprezintă arhiva digitală cu acces deschis a rezultatelor cercetărilor științifice și științifico-didactice efectuate în cadrul universității. Conținutul arhivei este multidisciplinar și include lucrări din domeniile științelor exacte și socio-umanistice.
The Institutional Repository of the State University of Moldova is an open access digital archive of the results of scientific and scientific-didactic research carried out within the university. The archive's content is multidisciplinary and includes works from the fields of exact sciences, social sciences and humanities.

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Recent Submissions

Assessment of physiological and biochemical recovery processes in four tree species following natural heat stress [Articol]
(University of Natural Resources and Life Sciences, 2025) Cuza, Petru; Zdioruk, Nina; Platovschii, Nicolai
The intensification of heat waves and extreme temperatures in recent years has negatively affected trees, reducing their growth processes and diminishing their capacity to withstand thermal stress. In this context, identifying the physiological and biochemical recovery processes in ecologically and economically valuable species is essential for sustainable forest management. This study investigated two forests dominated by Quercus petraea and by Q. robur located in the Plaiul Fagului Nature Reserve (Republic of Moldova). Detached leaves of F. sylvatica, Q. petraea, Q. robur and Fraxinus excelsior were collected and incubated under controlled conditions for ten days following natural exposure of the trees to thermal stress. The research assessed recovery processes based on functional parameters (photosynthetic pigment content, effective quantum yield of photosystem II), antioxidant activity (catalase and phenolic compounds), and leaf water retention capacity. F. sylvatica exhibited the highest tolerance to thermal stress, maintaining both photosynthetic function and leaf hydration. Q. petraea showed an intermediate response, characterized by elevated antioxidant activity. In contrast, F. excelsior recorded the lowest physiological and biochemical values, indicating increased vulnerability to thermal stress. Additionally, the physiological condition of Quercus robur trees revealed greater tolerance in individuals with green foliage compared to those with yellow-brown leaves. These findings suggest species-specific and condition-dependent differences in physiological adaptation mechanisms linked to foliar functional status.
Physicochemical Properties, Polyphenol and Mineral Composition of Different Triticale Varieties Cultivated in the Republic of Moldova [Articol]
(MDPI, 2025) Codină, Georgiana Gabriela; Ursachi, Florin; Dabija, Adriana; Paiu, Sergiu; Rumeus, Iurie; Leatamborg, Svetlana; Lupascu, Galina; Stroe, Silviu-Gabriel; Ghendov-Mosanu, Aliona
The quality characteristics of seven triticale grain varieties were determined by different physiochemical analyses. For this purpose, the content of protein, wet gluten, fat, ash, moisture, carbohydrates, test weight, and thousand-kernel mass; mineral elements Ca, Na, Zn, Fe, and Cu; and total phenolic content (TPC), total flavonoid content (TFC), free radical scavenging activity (DPPH assay), and phenolic profile (4-hydroxybenzoic acid, vanillic acid, caffeic acid, chlorogenic acid, p-coumaric acid, and rosmarinic acid) were analyzed. Also, Fourier transform infrared spectroscopy (FT-IR) was used to evaluate the quality parameters of triticale grains. According to the chemical data obtained, all triticale varieties may be used for breadmaking. A high variability was obtained among triticale varieties for mineral elements and antioxidant compounds. The highest values were recorded for Ca, followed by Fe, Na, Zn, and Cu. The TPC, TFC, DPPH, and phenolic compounds of the analyzed triticale samples increased with the increasing temperature used in the extraction method. Generally, the highest value for phenolic acid was obtained by p-coumaric acid followed by rosmarinic acid, caffeic acid, 4-hydroxybenzoic acid, vanillic acid, and chlorogenic acid. Principal component analysis of triticale cultivars related to their physicochemical data showed close association between some varieties such as Costel; Ingen 54, Ingen 35, Ingen 33, and Ingen 93, and Ingen 40; and Fanica varieties
Modificări morfologice nespecifice, provocate tuberculilor de cartofi de către paraziții secundari [Articol]
(Universitatea de Stat din Moldova, 2019) Melnic, Maria; Gliga, Olesea; Erhan, Dumitru; Rusu, Ștefan
În lucrare sunt indicate date privind unele modificări morfofiziologice provocate culturii cartofului (Solanum tuberosum L.) de către complexul de nematode saprofite asociate cu microorganisme. În procesul analizelor tuberculilor de cartofi de soi Agata, infestați de Ditylenchus destructor Thorne, 1945 în stadii avansate de ditilenhoză (3, 4), au fost observate modificări sub formă de umflături. Rezultatele analizelor de laborator ale tuberculilor infestați au demonstrat prezența nematodelor saprofite din ordinele Rhabditida și Aphelenchida în număr de circa 2000 de indivizi /gram de țesut, care sunt incluse în 2 grupe trofico-ecologice – bacterivore și fungivore. Conform calculelor, cele mai frecvent depistate sunt speciile din familiile Cephalobidae (63,2%), Neodiplogasteridae (17,6%) și Rhabditidae (12,8%), iar cele mai rar depistate sunt cele din familia Aphelenchidae (6,4%). Prezența nematodelor secundare, bacterivore și fungivore demonstrează că țesutul infestat formează un substrat nutritiv pentru aceste nematode.
The evaluation of the quality indices of phytomass from energy crops and agricultural residues [Articol]
(University of Agronomic Sciences and Veterinary Medicine of Bucharest, 2025) Ababii, Alexei; Țiței, Victor; Daraduda, Nicolae; Guțu, Ana; Gadibadi, Mihai
The objective of this research was to evaluate the quality indices of the solid dry phytomass from energy crops Miscanthus giganteus 'Titan', Silphium perfoliatum ‘Vital’, Sorghum bicolor, var. saccharatum 'SAȘM1' and agricultural residues – stems of Brassica napus oleifera and Pisum sativum collected in the experimental plot of the NBGI Chişinău. It has been found that elemental composition the collected dry phytomass was 41.36-50.00% carbon, 4.32-6.14% hydrogen, 0.221.37% nitrogen, 0.03-0.10% sulphur, 2.18-5.66% ash and gross calorific value varied from 18.2 to 19.6 MJ/kg phytomass. The solid dry phytomass contained 361-520 g/kg cellulose, 191-320 g/kg hemicellulose, 83-122 g/kg acid detergent fibre and the estimated theoretical ethanol yield averaged 410-592 L/t organic dry matter. The studied energy crops were characterized by optimal quality indices of phytomass and can serve as feedstock for the production of pellets and cellulosic bioethanol. The agricultural residues have higher content of ash, nitrogen, sulphur and lower concentration of structural carbohydrates and energy value, which make them suitable to be used as a part of a diverse mix with biomass from woody species
Sindromul metabolic ca reflectare a dissanogeniei interrelaţiilor psihosomatice [Articol]
(Universitatea de Stat din Moldova, 2019) Furdui, Vlada; Leorda, Ana; Guglea, Viorica; Televco, Anastasia; Beșetea, Tatiana
Sindromul metabolic reprezintă un efect advers al stilului de viață simpato-adrenal și stresogen al omului contemporan, care afectează 15-25% din populația globală. Modificările în sfera psihică la persoanele cu sindrom metabolic includ instabilitatea emoţională, tulburări cognitive, stări depresive, anxietate şi ipohondrie, iar manifestările somatice – obezitatea abdominală, precum și creșterea tensiunii arteriale, a conținutului glucozei și a unor indici ai colesterolului în sânge. Tulburările cognitive şi emoţionale, cauzate de rezistenţa la insulină, nu au legătură cu vârsta persoanei cu sindrom metabolic, dar depind de durata afecţiunii. Între severitatea manifestărilor somatice şi psihice ale sindromului metabolic şi nivelul neuromediatorilor excitatori există o corelaţie directă, iar cu nivelul neuromediatorilor inhibitori – o corelaţie inversă.