Browsing by Author "Rudi, Ludmila"

Now showing 1 - 7 of 7

Activitatea antioxidantă a preparatului etanolic în baza biomasei de Porphyridium cruentum [Articol]
(CEP USM, 2014) Sadovnic, Daniela; Cepoi, Liliana; Rudi, Ludmila; Valuţa, Ana; Chiriac, Tatiana; Codreanu, Svetlana; Miscu, Vera; Cojocari, Angela
There wasstudied the impact ofantioxidant complex from microalga Porphyridium cruentum biomass on the antioxidant activityof vegetable oilsand their oxidation process. The antioxidant complex was obtained by extracting in 96% ethylalcohol. Antioxidant assay using the radical1,1-diphenyl-2-picryl-hydrazil (DPPH) revealed an increase of the antioxidant activity of oils supplemented with microalgal antioxidant complex. There was determineda decrease (up to 40% for olive oil) in fatty acid oxidation for vegetable oils with microalgal antioxidant extract.
Biotechnological valorization of Arthrospira plantensis for heavy metal and rare earth element recovery from multimetallic effluents [Articol]
(Editura USM, 2025) Cepoi, Liliana; Chiriac, Tatiana; Rudi, Ludmila; Zinicovscaia, Inga
This study aimed to evaluate the bioaccumulation capacity of the cyanobacterium Arthrospira platensis for heavy metals and rare earth elements (REEs) from mono- and polymetallic effluents. Experimental systems were enriched with metals such as Ni, Cu, Zn, Cr, Fe, Sr, Mo, and REEs (Dy, La, Tb, Nd, Sm, Yb) at various concentrations. Metal accumulation in biomass was quantified using neutron activation analysis analysis. Biomass productivity was assessed spectrophotometrically based on a calibration curve, while oxidative stress was evaluated via malondialdehyde (MDA) content using the TBARS assay. Results demonstrated high accumulation capacities, with notable values for Cu (2870 mg/kg), Zn (up to 22500 mg/kg), Ni (1310 mg/kg), and La (>90% recovery). Biomass growth and MDA levels varied depending on the metal combination and concentration, indicating stress responses. A. platensis showed consistent resilience and was effective as a biosorbent, especially under moderate oxidative stress. The findings highlight its applicability in the bioremediation of wastewater containing diverse metal contaminants and its potential use as a matrix for biofortified supplements.
CAPACITATEA ANTIOXIDANTĂ A FRACȚIILOR DE PEPTIDE OBȚINUTE DIN FICOCIANINĂ LA HIDROLIZA ENZIMATICĂ
(CEP USM, 2016) Bulimaga, Valentina; Rudakova, Angela; Rudi, Ludmila; Pisova, Maria; Zosim, Liliana; Climova, Natalia
EUROPIUM BIOACCUMULATION BY ARTROSPIRA PLATENSIS AND ITS EFFECT ON BIOMASS
(CEP USM, 2022-09-29) Iușin, Nichita; Zinicovscaia, Inga; Cepoi, Liliana; Chiriac, Tatiana; Rudi, Ludmila
Extracts derived from spirulina cultivated on media with Cu and CuO nanoparticles as active agents for triticale seed priming
(CEP USM, 2024) Cepoi, Liliana; Rudi, Ludmila; Chiriac, Tatiana; Zosim, Liliana; Iațco, Iulia; Rudic, Valeriu
This study investigates the effects of seed priming in triticale using extracts from Arthrospira platensis cultivated with copper nanoparticles (CuNP) and copper oxide nanoparticles (CuONP). Results demonstrate significant increases in chlorophyll, carotenoid, and phenolic content, alongside enhanced antioxidant activity in the leaves. Notably, the treatment with nanoparticle-enriched extracts reduced malondialdehyde (MDA) levels, indicating a protective effect against oxidative stress. The findings suggest that spirulina-based extracts, even with the addition of nanoparticles, can enhance crop health, offering a sustainable approach to agriculture.
Influence of ZnS nanoparticles on productivity of red algae Porphyridium cruentum [Articol]
(Полиграфист, 2014-11-14) Goglidze, Tatiana; Dementiev, Igor; Guțul, Tatiana; Dvornicov, Dmitrii; Mironic, Tatiana; Rudi, Ludmila; Cepoi, Liliana
Наночастицы ZnS были синтезированы с использованием коллоидных методов, Для получения водного коллоидного раствора, поверхность частиц была модифицирована тиоглицеролом. Наличие тиоглицерола на поверхности наночастиц было подтверждено с помощью инфра- красной спектроскопии. Водный раствор наночастиц ZnS был протестирован на красных водорослях Porphyridium cruentum, которые были использованы в качестве биологического объекта.
Noi premixuri furajere în baza biomasei de spirulină cu selen [Articol]
(CEP USM, 2014) Rudic, Valeriu; Djur, Svetlana; Cepoi, Liliana; Chiriac, Tatiana; Rudi, Ludmila; Codreanu, Svetlana; Ghelbet, Viorica
There have been proposed the recipesfor preparing two feed premixes with organic selenium according to the sourceofinorganicseleniumused: “Spirulina with organic selenium 1 and 2” and “protein feed premix with organic selenium 1 and2”. The proposedpremixescomprise amulticomponent synergisticcombination in case of the first technological recipe and Spirulina extract containing freea mino acids, oligopeptides and selenium-containing proteinsin case of the second recipe exhibiting significant anti-oxidantactivity andimmunomodulatory effect.