GROWTH, DEVELOPMENT AND YELD OF MAIZE HYBRIDS IN VARIOUS CONFIGURATIONS AND DENSITIES OF SOWING UNDER EXTREME CLIMATIC CONDITIONS OF OBRAZTSOV CHIFLIK–ROUSSE I. ACCUMULATION OF BIOMASS

 Lubomir IVANOV, Siika PAVLOVA, Ivelina VENKOVA

Abstract. During the period 2007– 2009 a field experiment was conducted at the IASS “Obraztsov chiflik”– Rousse for determination of the accumulation of dry matter in three maize hybrids according to FAO: Clarica–300; Evelina–400 and PR35P12–500. The experiment was conducted in densities 4000, 5000, 6000 and 7000 plants per a da in two configurations of sowing–square and rectangular. The results showed that the tested hybrids accumulated various quantity biomasses depending on the climatic conditions, density and the configuration of the nutritive area. Under conditions of extreme soil and atmospheric drought, hybrid PR35P12 accumulated the highest quality of biomass in square configurations 50/50 cm and 44.7/44.7 cm and in the rectangular–70/35.7 cm and 70/28.6 cm, and hybrid Clarica–in the densities of 50/50 cm and 70/35.7 cm. Only hybrid Evelina accumulated more dry matter in the rectangular configurations of 70/35.7 cm and 70/28.6 cm.

Keywords: dry matter, density, square and rectangular configurations

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APPLICATION OF MODERN HERBICIDES FOR WEED CONTROL IN SPRING RAPE (Brassica napus)

Svetlana P. STOYANOVA

Abstract. A field trial with spring rape, JURA variety was conducted during the period 2007–2008 at the experimental fields of IASS “Obraztsov chiflik”–Rousse. The objective was determination of the efficiency of some herbicides applied alone and in combination in optimal doses. The herbicide napropamide, applied after sowing before emergence in dose of 157.5g/da a.s., decreased grass weed density 100% and the density of broad–leaved weeds by 89% and 84%, respectively. The herbicides fluazifop–p–butil and quisalofop–p–ethyl applied in doses of 22.5g/da a.s. and 7.5g/da a.s., were effective against the grass weeds as their density was decreased up to 98%, and against the broad-leaved weeds the percentage of efficiency was up to 83%. The herbicide napropamide applied in a system with herbicides fluazifop–p–butil or quisalofop-p-ethyl showed excellent herbicidal efficiency against the annual grass weeds (to 100%) and broad–leaved weeds (to 93%).

Keywords: spring rape, weeds, herbicides, efficiency, selectivity

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RISK ANALYSIS AND ADOPTION OF DECISIONS BY USING PALISADE SOFTWARE PACKAGE

Vasile CRISTIAN

Abstract: The rising volume of information conveyed and the speed of work are becoming increasingly necessary applications and devices to meet these requirements. Thus, in the actual society of knowledge, the impact of the new informational technologies was extended even in an important domain of human activity: the adoption of decisions. Consequently, the necessity of objecting at the selection process of the most favorable decision lead to the extension of the usage of information technology also in the conceptual phase. The decision tools suite (DTS) and the expert systems have the answer for the computer science workers at the needs of the deciders, used especially in the case of the decisions adopted in conditions of risk or uncertainty. The PALISADE package of programmers is a support system of decisions, which overlaps the processor tables, increasing the possibility of usage, especially for simulation problems, calculating the risk, building decision trees etc.

Keywords: computerization, simulation, palisade, risk, decision, analysis

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A FEW OBSERVATIONS REGARDING THE AGRICULTURAL POTENTIAL LEVEL OF THE TOWN JIMBOLIA COMPARED TO THE LEVEL OF TIMIS COUNTY IN THE YEAR 2009

Oana Maria MURG, Gyorgy BUDAHAZY, T. MATEOC, C. RUJESCU, A. GĂVRUŢA

Abstract. The scope of this work is to present the way of distribution of the main crops, livestock and farm’s equipment situated in town Jimbolia in Timis County (Romania). Values presented will be compared with their counterparts at the Timis County in order to analyze differences, indicating the possible features of local farms.

Keywords: agricultural potential, Jimbolia

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MICROWAVE EFFECTS ON HUMAN TISSUES

Oana MUNTEANU

Abstract. The present paper offers an overview of the various effects of microwave frequency electromagnetic fields on human tissues. Although the discussion covers a broad range of applications, special emphasis is set on fields generated by cellular telephony and domestic devices. The study shows that pathological consequences of low power level microwave radiation are very complex. Based on the results presented in a vast amount of literature, the paper attempts to answer the question whether or not microwave exposure involves risks for human health.

Keywords: microwaves, biological effects, cellular telephony, athermic level

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MODEL FOR A NETWORK INNOVATIVE RESEARCH AND TECHNOLOGY TRANSFER

Alin Daniel MUNTEANU

Abstract. It is well-known that in the present the competitive advantage of an economy it is not based only on products or services, natural resources or geographic particularities. The competitive advantage it is obtained today through innovation and the extensive utilization of knowledge. This paper focuses on innovation systems in Romania as the key challenge and mean for embracing growth based on knowledge-based economy. The network presents a significant potential for growth and development of new businesses or in progress. This project aimed primarily: focus on the platform of information in various fields, making available to all users of studies or reports. Transfer of innovation has an exceptional importance in successful market positioning of new technologies and strengthen the market position of a company. It also has the role of economic development in the context of global competition, leading to social progress.

Keywords: e-research, technology transfer, research web platform, internet research

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INTERNET INFORMATIONAL SYSTEMS IN AGROTOURISTICAL EXPLOITATIONS’ DEVELOPMENT

Alin Daniel MUNTEANU

Abstract: Telecommunications companies, entrepreneurs, and policymakers have regarded rural and poor markets with some combination of too-complex-to-serve and not-interesting enough (politically or economically) to be worthy of sustained attention. But times – and technologies – have changed, leaving what have been perceived as backwaters poised to become significant growth areas in the next decades.

Keywords: information communication technologies, rural area, Internet, informational systems

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DEUTERIUM DEPLETED WATER BEHAVIOR IN CHROMIUM (VI) INTOXICATED FEMALE RATS`

Lucia OLARIU, Mihaela PETCU, Stela CUNA, Camelia TULCAN, Corina GRAVILA,

Snejana PETROVICI, Mihaela PUP, Ileana BRUDIU

Abstract. The deuterium depleted water has a special influence on cells and tissues development. A decreasing of the deuterium concentration in tissues or bodies, significant slow down the proliferation of a lot of types of cancer. The aim of this work was to determine the antioxidant effect of deuterium depleted water (DDW) on rats with chromium induced oxidative damages (20 ppm Cr/ b.w. single dose as K2Cr2O7). Deuterium, malondialdehyde (MDA) and glutathione (GSH) blood levels were determined. After Cr(VI) intoxication, increased MDA and low GSH levels were registered. DDW administration could maintain both small deuterium and normal MDA and GSH levels. Low levels of deuterium in cells are favorable for good cell function. DDW performed an important Cr (VI) scavenger role in the rats`liver.

Key words: deuterium depleted water, malondialdehyde, glutathione, chromium, blood, rats

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NEW SURFACE FOR THE PREVENTION OF BIOFILMS AND BIOFOULING – A REVIEW

Fei YANG, Uta CHERUTI, Robert ARMON

Abstract. Since the early 80–s of the last century, biofilm study took off as a discipline on its own. The importance of biofilms in everyday life is beyond any doubt and beside its biotechnological advantages in large processes the hazardous effects are broad with serious financial effects in industry, health and environment. The main process of biofilm formation is its biofouling of almost all surfaces known to human kind (natural and synthetic). To prevent biofouling, new approaches were studied to inhibit surface colonization through development of new hybrid materials, use of biocides and antibiotics, understanding cell–cell communication (quorum sensing) as well physical measures. Hand to hand with advancement in materials chemistry, these new surfaces were developed with variable achievements due to the large diversity of biological systems. The present review describes some major directions in biofouling prevention through surface modifications.

Keywords: biofilm, biofouling, surface, colonization, prevention, materials chemistry, adhesion, adsorption

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PRODUCTIVITY OF ALFALFA GERM PLASMS. NEW DATA ABOUT ALFALFA ROOT LONGHORN BEETLE (Plagionotus floralis Pall.)

Evgeniya D. ZHEKOVA, Dimitriya S. PETKOVA

Abstract. During the first ten years of the new century a strong attack on alfalfa (Medicago sativa L.) was observed by the considered as economically insignificant alfalfa root longhorn beetle (Plagionotus floralis Pall.). The investigation was carried out in competitive variety experiment with 8 entries–7 new germplasms and the standard Prista 2 variety. The productivity of the alfalfa germplasms was determined during the period 2006–2009, including dry matter yield and yield of seeds. Number of green branches per plant; thickness of the root neck (mm), air–dry weight of the green mass (g) and number of moves and larvae of alfalfa root longhorn beetle were registered. There is a close correlation between dry matter yield, number of plants, diameter of root neck and number of moves and larvae of alfalfa root longhorn beetle. Number of larvae and moves of the pest could be more than one in one and the same root.

Keywords: Plagionotus floralis, larvae, moves, alfalfa productivity

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