Studia Universitatis Moldaviae. Stiinte reale si ale naturii

3-9

Authors: Aurelia CRIVOI, Iurie BACALOV, Elena CHIRIŢA, Ana ILIEŞ, Valentin AŞEVSCHI, Lidia COJOCARI, Iulian PARA, Irina BACALOV

In terms of contemporary civilization, man lives in a spacious sound, continually accompanied by a "cortege" noise and vibration of the most varied intensities and effects having more or less aggressive on the comfort and even on his health. Due to its harmful and its presence in all departments of life, noise pollution is a major problem in all countries where we are witnessing a phenomenon of increased noise levels.

15-20

Authors: Ina DIDILICĂ

In this paper there is analyzed the influence of zinc and selenium on male reproduction, as well as the factors that bring to their infertility. In order to overcome the infertility problems, more studies showed that namely the influence of the process of spermatogenesis via the essential factors, participants in spermo-production could regulate the biological properties' growth of sperm. The sperm formation involves a series of molecular and morphological changes in the male germ cells which are represented by the diploid stem cells, the spermatogonia, whose stock is maintained through mitosis, especially in the initial phases of spermatogenesis. Thus, the nutrition supplementation with the above-mentioned mineral elements improve the function and the reproductive system, as well as other vital systems of the organism.

28-31

Authors: Iulian PARA

Diabetes is a disease metabolic chronic what is due to the primary deficit absolute or relative insulin and is characterized by disturbing the predominant carbohydrate metabolism, reduced tolerance to carbohydrates, the presence of glucose in urine, along with impairment and other metabolisms: Lipid and protein.

43-48

Authors: Нина ФУЛГА, Ион ТОДЕРАШ, Дмитрий БУЛАТ, Денис БУЛАТ, Надежда РАЙЛЯН

In the context of middle Dniester the three-spined stickleback female spawn three portions of eggs. The ovulation of the fourth generation of eggs in the current breeding season does not occur due to the lack of conditions for the completion of trophic substances accumulation. Before sweeping the next generation oocytes the value of gonadosomatic index is significantly decreasing (P≥0.95), which indicates a decrease in the relative weight of the ovaries and in the number of yolk oocytes, forming the second and third generation of the eggs of the given breeding season. The value of absolute fecundity of females significantly increases with the length and weight of the fish's body (P≥0.95), while the value of the relative fertility significantly decreases with increasing of age of producers (P≥0.99).

56-60

Authors: Ala CHERDIVARĂ, Angela RUDAKOV, Andrei ŞUTOV

Among seed storage proteins, the peanut 7S globulin Ara h1 exhibits a highest allergenicity. Multiple antigen determinants (IgE epitopes) have been identified inside the Ara h1 amino acid sequence. The presence of potential IgE epitopes inside structurally equivalent homologous sequence regions of 7S globulins from other plants (mainly from soybeans) was shown. Probable existence of a cross-immunoreactivity between Ara h1 and the subunits of soybean 11S globulin Gly m G5 was demonstrated.

72-75

Authors: Alina BEŞLIU, Elena CHIRIŢA, Agafia USATÎI

The present work provides the results of the research of the influence of the inorganic nanoparticles TiO2 and Fe3O4 with the size of 30 nm, in different concentrations, on the growth process and biochemical composition of biomass stalk of the yeast Rhodotorula gracilis CNMN-Y-30. It has been found that nanoparticles at concentrations of 0.5 to 5.0 mg/L did not significantly alter the reproduction of the cells and the productivity of the yeast. The positive effect is manifested by favorable changes in carbohydrate and protein content, at the cultivation in the presence of the nanoparticles TiO2 and Fe3O4.

80-85

Authors: Elena SAŞCO

The following characters have been studied: the length of embryonic root and stem at early ontogenetic stage, the callus frequency of mature embryos, callus area and biomass of autumn common wheat parent genotypes Niconia, Odeschi 267 and reciprocal hybrids F1, F2, BC derived from reciprocal crossover of the genitors. It has been determined that maternal genitor Niconia was involved in the development of growth characters in optimum conditions (witness). On background with culture filtrate H. avenae the resistant genotype Odeschi 267 manifested as a maternal and also as paternal donor for the root and only maternal – for the stem. The hybrids of reciprocal combinations have demonstrated high specificity in phenotypic manifestation of callus frequency and callus area characters, between indexes being established negative correlations in witness and background choices with FC H. avenae. Genotype Niconia has been attested as an efficient genitor for the heredity of callus frequency, while for the callus area character – parent Odeschi 267. In phenotypic expression of callus genesis maternal effect manifested for characters at hybrids F1, F2, while the paternal form influenced the alternative proportion of additive factors in character expression at retro crossover hybrids. Through cluster analysis (dendrograms, k-means) of the growth index and callus genesis, it has ascertain similarities and repartition differences of reciprocal hybrids, the manifestation of genes that control characters – being influenced by FC H. avenae.

91-94

Authors: Irina STRATULAT, Victor ŞALARU, Sergiu DOBROJAN

In this study is presented the biochemical components of algal biomass Nostoc flagelliforme (Berk et Curt) Elenk. cultivated in laboratory conditions in Z-8 medium. The algal biomass has the following chemical content: Mn – 683,9 mg/kg, Zn – 131,5 mg/kg, Pb – <10 mg/kg, Fe – 1,09 g/kg, Na+ - 2,10 g/kg, K+ – 8,01 g/kg, Mg2+ – 5,40 g/kg, Ca2+ – 7,94 g/kg. The highest amount of amino acids are specific for: glutamic acid – 3,8012 mg/100 mg, aspartic acid – 2,7838 mg/100 mg, leucine – 2,4651 mg/100 mg, alanine – 2,3513 mg/100 mg. According to these results the blue-green alga Nostoc flagelliforme can be considered an important potential source of nutritional supplements.

103-107

Authors: Ludmila CUHARSCAIA

According to the Morld Conservation Union, invasive alien species are the second most significant threat to bio¬diversity, after habitat loss. In this article have been generalized and analyzed last data about specific composition of invasive flora from the Chisinau ecosystem, have been studied and analyzed some eco-biological characters of alien invazive plant species. Was assessed their negative and pozitiv impacts on the urban ecosystem, economy and human health.

122-127

Authors: Tatiana DUDNICENCO

In the results of these studies have been elaborated the ecotourism itinerary of „Rudi-Arionesti” landscape reserve, which are representative and accessible for ecotourists: „Rudi” monastery, „La trei cruci” Roman fortress, „Farfuria tur¬cului” medieval settlement, „Raposatilor” cave, „La santuri” Thracian origin fortress, „Valea Bradului”, „Izvorul Verde”. It have been described the main points for visitation within the selected route. It have been emphasized the ecological problems of „Rudi-Arionesti” landscape reservation which represents one of the basic destinations of ecotourism routes from Donduseni and Soroca districts and have been proposed solutions of its solving.

131-143

Authors: Anastasia PAHOLNIŢCAIA

The paper presents a review of the Schiff bases that contain hydrazinobenzothiazole, 4-aminotriazole and lysine and coordination compounds with these ligands described in the literature. 3d metal coordination compounds with these ligands have different composition, structure and properties. Both ligands and coordination compounds manifest antitumor, antibacterial, and antituberculous activities. Copper(II) coordination compounds with these ligands manifest better anti¬tumor activity than corresponding Schiff bases.

151-152

Authors: Viorica Gladchi

Când Omul ajunge la etapa realizărilor multiaspectuale, de regulă, în momentul atingerii unui jubileu, se opreşte puţin din alergătură, se uită la sine dintr-o parte, examinează toate reuşitele, biruinţele (în luptă cu insuccesele), îşi apreciază culmile atinse pe parcursul vieţii, face o com¬paraţie între „ce este” şi „ce ar fi fost dacă”, neapărat se luminează la faţă şi mulţumeşte Domnului pentru ziua de ieri, cea de azi, dar, mai ales, pentru cea de mâine. Acest Om poate fi asemuit cu Aurelian Gulea, academician, doctor habilitat, profesor universitar, şef al Departamentului Chimie la Facultatea de Chimie şi Tehnologie Chimică a USM.