Studia Universitatis Moldaviae. Stiinte reale si ale naturii

03-11

Authors: Ştefan MANIC

Data on ecological diversity of lignicolous macromycetes inventoried in the Republic of Moldova are mentioned in the paper. It has been determined that trophic links are closely related to the physical condition of the wood, which shows the specificity of the relationship mushroom-substrate. The 272 species of lignicolous macromycetes inventoried in various stages of wood decay were differentiated into three phases of wood decay. Wood macromycetes, namely Aphyllophorales, mainly participate in the first and second phase. In the third phase, wood decay is caused almost entirely by Agaricales.

17-21

Authors: Аркадий НИКОЛАЕВ, Светлана НИКОЛАЕВА, Ирина МАКСИМОВА

A method for colony account in Petri dishes by analyzing digital images of dishes and marking of recorded colonies by means of computer graphics editor Microsoft Paint and a registration of recorded colonies number in the new open Microsoft Office Excel window is proposed. Obtaining digital images allows documentation and archivation the data and to carry out account at any desired time. Possessing all device advantages for counting colonies in Petri dishes, the method allows to avoid any other special devices for this purpose and to account any kinds of microorganism colonies.

28-33

Authors: Maria TIMOŞCO, Natalia FLOREA, Radu COJOCARU, Aliona VELCIU , Victoria BOGDAN

Acceleration of the multiplication process of the bifidobacteria and lactobacilli reveals the significant role for human health. In results of investigation of the 3 strains and its 3 associations multiplications (initially respectively of I-VI groups, at 106,62 and 49,64; at 107,57 and 61,70; at 110,29 and 55,40; at 124,20 and 61,97; at 97,32 and 72,20; at 96,47 and 69,46%), was shown considerable adhesion to the intestinal mucous membrane (in the same groups respectively at 134,05 and 33,84; at 138,36 and 79,61; at 151,29 and 72,69; at 156,46 and 71,92; at 167,24 and 142,24; at 184,05 and 137,30%, comparing with a control group). Bifidobacteria and lactobacilli display the positive impact for human health conditions and diminish the multiplication rate of the facultative bacteria (conditional pathogens) of the digestive tract (Escherichia, Proteus and the family of Streptococcaceae).

37-41

Authors: Ludmila BEJENARU

In the current work we propose efficient methods of manoproteins extraction from yeast biomass. The method of application of cellular biomass autolysis for 24 hours combined with alcaline treating increases the manoproteins extraction with 23.3%, compared to the control sample. Physical and chemical attributes of the isolated manoproteins from yeast cell walls are described.

51-58

Authors: Aurelia CRIVOI, Saleh YAACOUBI

The purpose of this study is to systemize a neuro-physiological modification scopes that is related to regulate the obesity and food intake among diabetics type2. the plant cinnamon was examined in order to understand its influence upon beta pancreatic cells to secret insulin as well as to comprehend its effects upon leptin (which is secreted from adipose tissue) and on neuropeptide Y(a potent food intake) which participate in obesity.

63-66

Authors: Petru PAVALIUC

The article analyzes the data according to which mental health represents a dynamic, multi-level process or pheno¬me¬non, each level of which is characterized through various psychic and psychosomatic manifestations, regulation and adaptation mechanisms, and individual relationships with the surrounding world. However, mental health can be defined as an integral sanogenous feature of the subject which is in direct relationship with the external environment. Mental health manages the evolution of the mental processes and is determined by different social and individual criterion.

74-79

Authors: Iulian PARA

The use of all the beekeeping products for maintaining and protecting directed improvement of their health and their effects sanogenic tests on a large number of consumers and patients, allow to arrive at objective conclusions about the usefulness of broadening their mass production and use by a growing number large population.

87-93

Authors: Aurelia CRIVOI, Iurie BACALOV, Elena CHIRIŢA, Ana MĂRJINEANU

Iodine is an essential nutrient for the synthesis of thyroid hormones, which are critical for brain development. Much of our health problems are due to hormonal disorders. With age, these aspects are emphasized. There were obtained remarkable results by removing hormonal imbalances using individualized treatment plants and other natural products. These treatments, although sometimes it takes longer than medical treatments, are much cheaper and have no side effects.

99-103

Authors: Лидия КОЖОКАРЬ, Аурелия КРИВОЙ

Symptoms of varying degrees of thyroid failure were shown to all patients with hypothyroidism confirming the high concentration of TSH. High, medium and mild constant anxiety was identified to patients with primary and post-operative hypothyroidism; continuous medium and light anxiety to patients with congenital hypothyroidism. The clinical manifestations of anxiety having vegetative and psychic character as the symptoms associated with changes in the functional state of the nervous system are the most permanent hypothyroidism.

109-1116

Authors: Valentina BULIMAGA, Maria PISOVA, Liliana ZOSIM, Angela RUDAKOVA, Natalia CLIMOVA, Veaceslav REVA

Development and application of enzyme engineering technologies using enzymes for the hydrolysis of Phycocyanin and production of bioactive peptides opens up new prospects for their use as anticancer, antimicrobial, antioxidant, hypotensive agents. Diversification of the range of produced peptides can be performed by the enzymolysis and using of the proteolytic enzymes with diverse specificity for this purpose. The paper presents the UV spectra of summary tryptic phycocyanin hydrolysates and some methods of separation and analyzing of peptide fractions.

121-124

Authors: Елена ПЕЛЯХ, Виктор МЕЛНИК, Василий ЧОБАНУ, Ион УНГУРЯНУ

In course of our investigation of genus Mentha we have analyzed the essential oils of some widely growing population of Mentha piperita L. collected in different regions of Moldova. The essential oils showed the same chemical composition but oil compounds in various proportions.

132-137

Authors: Ho Anh TUAN, Ngo Xuan QUANG, Laurentia UNGUREANU, Dumitru BULAT

Analysis and identification of 57 specimens of genus Macropodus Lacépède collected from Gianh River in Quang Binh province in north center region Vietnam. We have classified three species: Macropodus erythropterus (Frey. & Her., 2002), Macropodus opercularis (Linneaeus, 1758), Macropodus spechti (Schreitmüller, 1936) was first discovered in the study area and north center region Vietnam.

148-159

Authors: Dumitru ERHAN, Elena GHERASIM

The paper presents data on trematodes infestation in amphibians from family Ranidae (Amphibia, Anura) in natural and anthropized ecosystems of Central Codri forest from the Republic of Moldova. The helminthological researches of amphibians were accomplished for the first time in the Republic of Moldova. As result the infestation of Ranidae family species (Rana ridibunda, R. lessonae, R. esculenta) with trematodes from families Gorgoderidae (Gorgodera varsoviensis Sinitzin, 1905), Diplodiscidae (Diplodiscus subclavatus Pallas, 1760), Plagiorchiidae (Opisthioglyphe ranae Frohlich, 1791, Haematoloechus variegatus Rudolphi, 1819), Cephalogonimidae (Cephalogonimus retusus Dujardin, 1845) and Lecithodendriidae (Pleurogenes claviger Rudolphi, 1819, Pleurogenoides medians,Olsson, 1876, Prosotocus confusus Looss, 1894, Candidotrema loossi, Africa, 1930) was established. In the paper there are presented the resuts regarding the infestation of complex Pelophylax esculenta by the trematode species from families Plagiorchiidae and Cephalogonimidae. For each species there were established: taxonomic status, including synonyms, the hosts, the location in organs, the geographic spreading, etiology and biologic cycle. There are also mentioned the amount of collected material, the morphologic description of the species, original figures and pictures, the level of infestation depending on age, sex and ecosystem.

164-172

Authors: Vera MATVEEVICI, Maria GONŢA, Larisa MOCANU, Viorica IAMBERTEV

Laboratory research has been conducted on model systems containing textile dyes as basic components, and as auxiliary compounds were used surfactants and polyalcohols. The concentration of the organic components of the studied systems is reduced as a result of using advanced physic-chemical methods. At first stage was performed electrofloatation process that takes place under the action of electrolytic gases, which was followed by oxidation with Fenton's reagent or titanium dioxide with UV irradiation (Λ=365 nm). Samples that have not been treatment to acceptable standards have been subjected to the subsequent adsorption process of compounds remaining onactive carbon. As a result of scientific research it was found that the degree of water purification by organic compounds depends on the time of electrofloatation and surfactant concentration. The mixture of active dyes and cationic surfactants in model solutions may be treated by a combination of electro¬floatation and adsorption methods on active carbon, and the solutions containing a mixture of direct and active dyes, anionic surfactants can be purified by combining electrofloatation, catalytic oxidation with hydrogen peroxide methods, and adsorption on active carbon. In the presence of polyalcohols (ethylene glycol) the effect of removing the mixture of dyes, surfactants and ethylene glycol decreases,therefore, solutions are not purified to the sanitary norms, even in case of combining electrofloatation, catalytic oxidation and adsorption on active carbon methods.

178-185

Authors: Vasile RUSU, Alexei MAFTULEAC, Oleg PETUHOV, Veaceslav KULCIŢKI, Marina GRINCO, Larisa POSTOLACHI, Maria RUSU

Larguta bentonite prior treatment with dilute acid (pH 2) further being pillared with aluminum oligomeric species, result in modification of the surface properties of the adsorbents - acidity, sorption-structural characteristics and thermal stability. The kinetics of the conversion of oleic acid to esterification with ethylic alcohol is influenced by the nature of the acid catalysts used. Pillared adsorbents obtained on the basis of bentonite Larguta (RM) possess real prospects for obtaining bio-fuel from vegetable oils.

193-209

Authors: Ion BULHAC, Anastasia ŞTEFÎRŢĂ, Eduard COROPCEANU

There were highlighted iron, cobalt, manganese μ3-oxo homo- and heteronuclear coordination compounds, dioximates and compositions consisting of macro-, microelements and vitamins with stimulation properties of crop plants growth and development, rising the germination energy of treated seeds, antioxidant properties, increasing plant resistance to drought and suboptimal temperatures, incrementing plant productivity and improvement of production quality. There were established the terms of use, including optimal concentration of coordination compounds in the cultivation processes of agricultural plants: corn, sugar beets, beetroot, cucumbers, tomatoes, beans, soy and other.

216-223

Authors: Oleg PALAMARCIUC, Tatiana PALAMARCIUC, Ion CORJA

The condensation of 5-bromosalicylaldehyde with Girard’s T reagent yields a new hydrazone [H2(5BrSalGT)]Cl. This tridentate ligand is soluble in water and react with iron ions with the formation of coordination compound [FeLCl2]. In water solutions [FeLCl2] interact with azide ion N3- allowing the formation of [FeL(N3)2]2 (1) and [Fe(L)2]N3.6H2O (2) compounds. The crystallographic studies of 1 and 2 show that in the coordination process the ligand is deprotonated and coordinate to the metal as monoanion. The cryomagnetic studies of 1 and 2 show a paramagnetic behaviour.

230-235

Authors: Victor COVALIOV, Irina SENICOVSCAIA , Vladimir NENNO, Valentin BOBEICA, Olga COVALIOVA

The influence of amaranths‘ seeds as the source of squalene on the dehydrogenase activity and efficiency of methane production were investigated in methanogenic bench-scale (5000 ml) bioreactors used to treat the mixture of distillery wastes and farmyard manure. The adding of amaranth seeds to the methanogenic bioreactor has an inhibitory effect on the dehydrogenase activity and stimulates the process of methanogenesis. Dehydrogenase activity decreased with the increase of doses of squalene and its trend had a close connection with doses (R2=0.77-0.78). The methane content in the total amount of gases is 65.3-71.3% in a bioreactor with the additive of amaranth seeds in a dose of 50 mg l-1, which is 22.1% higher than in the the control bioreactor without additives. The increase in squalene concentration higher than 0.0005% is not rational because its stimulating effect on the methanogenic process decreases. Anaerobic digestion of alcohol distillery industry wastes with manure is a complex nonlinear time-varying microbiological process. Dehydrogenase activity trends in the experiment are described by the power function for 5 hours observations and by the logarithmic function for 120 hours of observations. Trends of CH4 are described by the polynomial function in all periods of testing. Correlation coefficients are 0.37 and 0.70 for CH4 after 5 and 120 hours of the anaerobic digestion. Dehydrogenase activity is in the close negative connection with the amount of gases, including methane. Correlation analysis between dehydrogenase activity and the release of gases has revealed the moderate and strongly negative link during 24 hours after the start of the experiment.