Facultatea de Biologie și Geoştiinţe / Faculty of Biology and Geosciences
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Item Cultivarea algei nostoc flagelliforme (berk et. curt) elenk. după metoda semicontinuă [Articol](CEP USM, 2014) Stratulat, Irina; Dobrojan, Sergiu; Şalaru, VictorThe semicontinuous method for cultivation the alga Nostoc flagelliforme leads to a higher quantity of biomass in a short period of time. The high algal productivity is obtained at elimination and substitution of 25% of the nutritive medium Z-8 (12,44 g/l) and elimination and substitution of 50% of medium Drew (5,78 g/l). The pH of the nutritive media for cultivation the alga Nostoc flagelliforme by semicontinuous method have increasing trends followed by decreasing and does not differ substantially depending on the concentrations of elimination and substitution of nutritive medium.Item Utilizarea algei Cylindrospermum licheniforme în procesul de epurare a apelor reziduale orăşeneşti [Articol](CEP USM, 2014) Popescu, Tudor; Şalaru, Vasile; Şalaru, Victor; Dobrojan, Sergiu; Ouddane, Boghdad; Nelea, Andruh; Rabodonorina, SuzanahLes eaux de sortie des stations de traitement des eaux (eaux de STEP) peuvent être utilisées pour cultiver l’algue Cylindrospermum licheniforme. On obtient une biomasse algale moins chère et on réduit considérablement le flux de matière inorganique dans l’eau. On peut obtenir plus de quantité de biomasse en cultivant l’algue Cylindrospermum licheniforme dans un milieu fait avec 100% d’eau de STEP (680,96104 mg/l) et la quantité de biomasse obtenue diminue en milieu constitué avec 50% d’eau de STEP (538,3942mg/l).Item Selectarea mediului optimal pentru cultivarea speciei Nostoc gelatinosum (Schousb.) Elenk. [Articol](CEP USM, 2014) Donţu, Natalia; Şalaru, Vasile; Şalaru, Victor; Stratulat, Irina; Trofim, Alina; Dobrojan, SergiuThe choice of culture medium for algae growing is an important milestone because it can affect the economic aspects of the production process. For cultivation of Nostoc gelatinosum algae the most optimal medium are Drew and Z8. The highest values of algal productivity may be obtained according the semicontinuous method. With the increase of algal productivity pH values change to basic direction.Item Effect of light on the process of biological nitrogen fixation in blue-green algae nostoc gelatinosum (Schousb) Elenk.and Cylindrospermum licheniforme (Bory) Kütz. (Cyanophyta) [Articol](CEP USM, 2014) Dobrojan, Sergiu; Stratulat, Irina; Şalaru, Victor; Dobrojan, GalinaLighting regime directly influences the process of biological nitrogen fixation carried out by algae Nostoc gelatinosum (Schousb) Elenk. and Cylindrospermum licheniforme (Bory) Kutz. The natural light contributes to the intensification of biological fixation of atmospheric nitrogen in these algae, and the dark regime leads to inhibition the biological nitrogen fixation. Biological nitrogen fixation by blue-green algae achieved by Cylindrospermum licheniforme and Nostoc gelatinosum is a reversible self-regulating process.Item The influence of light on morphological changes of blue-green algae nostoc gelatinosum (Schousb) elenkand cylindrospermum licheniforme (Bory) kütz. (Cyanophyta) [Articol](CEP USM, 2014) Dobrojan, Sergiu; Stratulat, Irina; Şalaru, Vasile; Trofim, Alina; Dobrojan, GalinaThe light influences the morphological aspects of algae Nostoc gelatinosum (Schousb) Elenk. and Cylindrospermum licheniforme (Bory) Kutz.. The dark regime generates the dimensional reducing of vegetative cells and heterocysts leading to the alteration of biomass, but spores do not suffer significant changes. Cultivating these algae to favorable conditions of natural and artificial light (continuous), results with launching the process of self-regulating dimensional of cells. The most beneficial sources of ilumination are natural and artificial light.Item Influenţa spirulinei platensis cultivată pe ape reziduale de la complexele de bovine asupra tiroidei în dereglările ioddeficitare [Articol](CEP USM, 2014) Bacalov, Iurie; Dobrojan, Sergiu; Crivoi, Aurelia; Bacalov, IrinaThis study reflects the current status of thyroid diseases in the Republic of Moldova, as well as research of plant preparations with biostimulating action when are in the body. Administration of amino acid extract of spirulina grown on wastewater from bovine complexes in concentration of 5% contributes to the normal functioning of the endocrine system and other organs, particularly have effective action on the functional status of the thyroid gland in insufficientiodinedisorders that are expressed by maintaining the normal limits of triiodothyronine and thyroxine in this pathology.Item INFLUENŢA SPIRULINEI PLATENSIS CRESCUTE PE APE REZIDUALE ASUPRA INDICILOR HEMATOLOGICI ÎN DIABETUL EXPERIMENTAL(CEP USM, 2010) Dobrojan, Sergiu; Bacalov, IurieIn present article are described investigation done on theme mentioned above. The alga administration as supplementare contribute to decreasing of glucose, increasing of erythrocytes, and maintaining of the same level of blood sedimenttation speed in comparison with control. In the case of administration in the present of diabetes were observed the decreasing of glucose level in blood, decreasing of blood sedimentation speed level and increasing of erythrocytes level and also of haemoglobin. In such way we can affirm that Spirulina biomass grown on waste waters from live-stock are influenced positively in both cases: in case of administration as supplement and also in case of diabetes.Item UTILIZAREA BIOMASEI DE SPIRULINA PLATENSIS (NORDST.) GEITL. CRESCUTĂ PE APELE REZIDUALE DE LA COMPLEXELE AVICOLE ÎN CALITATE DE SUPLIMENT NUTRITIV LA PUII BROILER(CEP USM, 2010) Dobrojan, SergiuThe given article presents information about the use of Spirulina platensis biomass (NORDST.) GEITL reared poultrycomplexes from waste waters as nutritional supplement in broilers Spirulina administration increases the waste water asa supplement in chicken broiler nutrition, contributes to increase sustainability, increases body weight by 10/15% of control,determines growth of internal organ weights 27-40%, favorites the state of the haematological indices of the blood.Item UTILIZAREA APELOR REZIDUALE DE LA COMPLEXELE ZOOTEHNICE LA CULTIVAREA INDUSTRIALĂ A ALGEI Spirulina platensis (NORDST.) GEITL.(CEP USM, 2009) Dobrojan, Sergiu; Şalaru, Victor; Şalaru, VasileThe results of effectuated experiments are demonstrating that the residual waters of animals growing farms can be used in the quality of nutritive medium in the aim of algae biomass obtaining with reduced prime cost in comparison with biomass grow on mineral mediums. From two types of residual waters used in the quality of nutritive medium for Spirulina cultivation the most favorable are that of cows farms in concentration up to 10% when alga’s biomass increases its value from the mineral medium.Item UTILIZAREA METODEI DE CULTIVARE SEMICONTINUĂ A ALGEI ANABAENOPSIS SP. PE MEDIUL NUTRITIV Z-8(CEP USM, 2013) Dobrojan, Galina; Stratulat, Irina; Dobrojan, SergiuCultivarea algei Anabaenopsis sp. pe mediul nutritiv Z-8 după metoda semicontinuă este mai eficientă, realizânduse mai rapid desfăşurarea fazei exponenţiale de creştere. Cea mai eficientă extragere şi substituire a mediului nutritiv s-a dovedit a fi cea de 50%, care contribuie la obţinerea a 9,3±0,850 g/l de biomasă algală la a 9-a zi. Cele mai înalte valori ale vitezei specifice de creştere a biomasei algei Anabaenopsis sp. se atestă în loturile cu extragerea şi substituirea a 50% din mediul nutritiv atingând 0,999±0,049 zile-1 , iar cele mai mici în loturile cu extragerea şi substituirea a 75%– 0,567±0,02 zile-1 . pH-ul mediului nutritiv optim este situat între 9,543 şi 10,646.