Browsing by Author "Coropceanu, Eduard"

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    COORDINATION COMPOUNDS AND CHEMICAL COMPOSITIONS WITH ANTIOXIDANT PROPERTIES
    (2023) Bulhac, Ion; Ștefîrță, Anastasia; Brînză, Lilia; Coropceanu, Eduard; Voloșciuc, Leonid; Cocu, Maria
    In the paper are presented the main results that argue the antioxidant effect of BACC and some chemical compositions on plants. The anti-stress action of the new preparations - Conimid, Difecoden, Fludisec, Polyel, Galmet and Thiogalmet, is provided by increasing the antioxidant protection capacity due to the decrease of the content of malondialdehyde, intensification of the activity of antioxidant enzymes, increase in the content of non-enzymatic antioxidants with low molecular mass. The possibilities of optimizing the resistance of plants to oxidative stress, caused by drought, and stabilization of plant productivity are promising. The biological performance of plants pre-treated with BACC and antioxidant preparations are more fully realized under both optimal moisture and moderate drought conditions.
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    THE INFLUENCE OF SOME Ca(II) AND BA(II) WITH Co(II) COMPOUNDS ON THE PRODUCTIVITY OF THE CYANOBACTERIA SPIRULINA PLATENSIS
    (2023) Nedbaliuc, Boris; Coropceanu, Eduard; Ciobanu, Eugeniu; Grigorcea, Sofia; Ureche, Dumitru; BrÎınză, Lilia
    The article includes experimental results related to the productivity of the Spirulina platensis (Nordst.) Geitl - CALU - 835 strain, which was cultivated for 8 days on modified nutrient media supplemented with two coordination compound containing Ca and Ba. A greater amount of biomass was recorded when growing spirulina on the Zarrouk culture medium supplemented with these coordination compound in a concentration of 5 mg/L, accumulating a fresh biomass of about 13,3 g/L and 12,8 g/L, respectively, or about 14,5% and 9,9% higher than that accumulated by the witness.
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    Promovarea instruirii prin cercetare în curriculum la chimie în baza conceptului STEAM
    (CEP USM, 2023) Cazacioc, Nadejda; Rotari, Veronica; Coropceanu, Eduard
    Studiul include analiza Curriculum-ului modernizat în 2019 la Chimie. Sunt anlizate elementele cercetării în curriculum și ponderea lor în raport cu numărul total de ore per clasă și ciclu de studii. Totodată, este cercetat rolul profesorului în corelarea obiectivelor evaluării care au rolul de a forma la elevi competențe proprii și de a-i orienta spre succes, ceea ce denotă calitatea procesului instructiv-educativ. Acesta depinde de nivelul formării profesionale și mijloacele de predare care le-ar trezi interes pentru studii conștiente elevilor și totodată să-i pregătească pentru viață.