Studies on Heteroptera (Hemiptera) order in agrocenosis of winter vetch (Vicia villosa Roth.) in Pleven region

I. NIKOLOVA, N. GEORGIEVA

Abstract: During 2007-2010period was studied the quantitative and qualitative composition of species of Heteroptera order in winter vetch agrocenosis in Pleven region, as and the population dynamics of economically the most important species of them in order to proper determine the timing and means of control. Fauna of Heteroptera in winter vetch stands was represented by 8 families, 18 genera and 19 species.As dominant pests from family Pentatomidae outlinedPiezodorus lituratus (28.0% of total number),from family MiridaeLygus rugulipennis (24.6%), Adelphocoris lineolatus (10.3%) and from family CoreidaeCeraleptus gracilicornis (9.1%). Useful insects werethe speciesfrom family Nabidae – genus Nabis (5.7%) and from family AnthocoridaeOrius niger (11.1%). The participation ofHeteroptera order inwinter vetch agrocenosis was greatest at the stage of pod formation in the second and third decade of June and in the beginningof July. At this period, in case of need, it should be carried out chemical control. It should be planed 15-20 days before appearance of the imago. The population dynamics of useful species from genus Nabis and Orius niger followedor correspondedwith that of harmful bugs that underlined their important role as bio-agents.

Key word:Viciavillosa, Heteroptera order

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UTILIZATION OF OSTRICH OIL IN FOODS

Amany M. M. BASUNY, M. Arafat SHAKER & L. Nasef SHEREEN

Abstract: Ostrich (Struthio camelus) was used as a new source of animal fats. Some physical and chemical properties for the ostrich oil compared with other fats (beef, bafflo, cattle, sheep and chicken), fatty acid composition and unsaponifiable matter were determined. Ostrich oil was fractionated to liquid and solid fractions and determined some characteistics of two fractions. Blendig sunflower oil with olein fraction showed that oxidative stability, which was evaluated by the Rancimat method at 100°C was obtained from ostrich oil by dry fractionatoin. The results indicated that blending sunflower oil with olein fraction on effective method to prepare more stable vegetable oils. Ostrich olein was mixed separately with sunflower oil at (8:2, 7:3 and 5:5, v/v). The frying process was conducted at 180°C±5°C for 20 hr, 5hr per day. Some physicochemical properties of non–fried and fried oil mixtures were measured at various heating periods. The results demonstrate that mixing ostrich olein with sunflower oil increased the stability and hence improved the quality of sunflower oil during frying process. Ostrich stearin was used to replace fat in cake manufacture at ratios (0.00, 25.00, 50.00 and 75.00%). Sensory evaluations of cakes were determined. Data revealed that replacements of fat with ostrich stearin improved sensory characteristics of baked cake. 

Key words: ratite family, ostrich oil, fractionation, blending, frying process, bakery products.

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EFFECTS OF THE MARL ON THE PERFORMANCE OF CHICKEN FEEDING STARTING DIET CONTAINING ACID OIL

Ouachem DERRADJI, Soltane MAHMOUD, Hadjar AMEL, Bakroune FATEN, Kalkil TOUFIK, Bensalem ADEL, Smaili ABDELMADJID, Haddad SMAIL, Abdessemed FATIHA

Abstract: Following the prohibition of the animal products use in animal food and the rise in the prices of the basic raw materials, various products were offered like alternative to the poultry food industry. Among these products, various acid oils have been tested to substitute partially the corn in poultry feed. However, the digestive constraints restrained their use. Clay is an excellent natural substance that could be used to improve digestibility of lipids and growth performances (Ouachem et al., 2009). For this purpose, the incorporation of 5 % soybean acid oil with and without 3 % of Marl was tested on broiler chicken. In this trial, the growth performance between 1 and 10 days, a digestive assessment between d9 – 12 and the state litter quality were studied. Comparatively to the control diet, the use of acid oil tended to reduce the growth performances and the digestive effectiveness. While the addition of 3% of marl for the diet containing acid oil, showed a significant increase of the weight gain (+13.5 %; p = 0.001) and improvement of the feed conversion ratio (-10.3 %; p = 0.02), and on the other hand, a significant increase of the proteins utilisation (+ 18 %; p = 0.001) and fatty matter (+5.1 %; p = 0.02). The results showed also that clay contribute significantly to improve the litter quality by the highest rate of dry matter (+ 33.7 %; p = 0.03). Under our experimental conditions, it is suggested that acid oil may be included with 3 % of marl in the diet of chicken. 

Key words: marl; acid oil; litter state; digestive assessment; growth performance; chicken

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EDUCATION IN SOLAR ENERGY AT THE “POLITEHNICA” UNIVERSITY OF TIMIŞOARA

Ioan LUMINOSU, Aldo DE SABATA, Coleta DE SABATA

Abstract. Following recent economic trends in the field of solar energy and an increasing need for specialists, a Master Degree has been introduced at the “Politehnica” University of Timişoara last year. The Curriculum is applications oriented and covers both PV and thermal aspects. In this paper, we present some topics that are intended for laboratory classes: thermal circuits in a Solar House, which can also be used for demonstration.

Keywords: solar energy, education, curriculum, collectors, thermal circuits.

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OPTIMIZATION OF WORK PERFORMANCE WITH LINUX OPERATING SYSTEM

Vasile CRISTIAN

Abstract. In this article there will be made a presentation as detailed as possible of the most important characteristics of Ext2 files, which are some of the most used file systems of LINUX operating system. Also here there will be analyzed the main settings from Ext2 file system, and the base attributes that characterize this type of files. Also there will be presented the base structure of Ext2 file system, on fields and blocks, for a correct understanding of the work type and administration approach by LINUX operating system. All these characteristics have the purpose of presenting a few aspects concerning the work approach with Ext2 files and some optimization work methods with LINUX operating system.

Keywords: files, folders, setting, attributes, fields, optimization, connections

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THE POLLUTION OF THE SOILS, THE UNDERGROUND AND SURFACE WATERS, FROM HUNGARIAN–ROMANIAN CROSS–BORDER AREA

János NEMCSÓK, H. EDITARE, J.ZSANETT, A. BĂNEŞ, M. HORABLAGA, C. BOSTAN

Abstract. The aim of the pollution reduction project is to facilitate exchange and evaluation of interventions on environment and health exposure reduction measures on a regional level, and promote implementation of successful initiatives in Hungarian–Romanian cross–border area. One of the problems addressed by the present project is the pollution caused by the improper management of domestic and agricultural waste in the neighbouring communities of the border area. The area is evaluated by the parteners as being of community importance and will be proposed to be included the exchange of useful practices in two key areas in environmental health policy: (1) the reduction of transport–related health hazards (air pollution and noise) and (2) the improvement of the indoor environment by reducing indoor exposure to environmental health hazards.

Keywords: environmental factors, health policy, good practice; pollution reduction.

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QUALITY CONTROL OF USED WATERS IN TECHNOLOGICAL PROCESSES OF OBTAINING ICE–CREAM PRODUCTS

Monica FIRCZAK, Delia Maria PERJU, Mirabela PANFILOIU,

Sorina STANCA, Persida OLAR

Abstract. Drinking water is an essential element in the assurance of public health and the quality of life. Today the sources of drinking water as rivers, lakes and underground waters are in danger of being polluted by different contaminants. Water’s quality can be defined as a conventional assemble of physical, chemical biological and bacteriological characteristics, expressed as a value which allows the evaluation of the sample and the appreciation of its category. In the European legislation, as well as in our national legislation permitted levels for contaminants in drinking water Maximum are described. The concentration level domain varies from a zero in case of microorganisms such as Coloformii faecali to very small values–like ng/L for other contaminants–all these limits are established concerning the potential danger for human health or the modification of the quality organoleptic characteristics of the water.

Keywords: water, quality, control, ice–cream

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QUALITY CONTROL OF ICE–CREAM PRODUCTS USING THE HACCP METHOD

Mirabela PANFILOIU, Monica FIRCZAK, Delia Maria PERJU, Gheorghita SIMION

Abstract. Ice cream is a product obtained from controlled raw materials, processed through pasteurization, homogenization, maturation, cooling, freezing, through keeping the air in composition, with or without glazer, and sell in different casseroles or waffle. For every product of ice cream a technical description is made. On this sheet one can find all the ingredients used, the physical–chemical and microbiological characteristics of the final product, the quality control rules applied and the particular analytical methods used for every product. The purpose of this paper is to describe the critical points in which hazard can intervene in the production process, the evaluation and the measures applied to prevent and control these critical points. This method is applied to all the technological processes for obtaining the ice cream based on milk and fruits.

Keywords: HACCP control, ice–cream

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GEOMETRICAL METHOD AND DEVICE USED TO DRAW THE RESONANCE GRAPHICS FOR A RLC SERIES CIRCUIT IN ALTERNATIVE CURRENT

Ioan LUMINOSU, Nicolina POP, Viorel CHIRITOIU

Abstract. The paper form and develop the student’s skills and abilities to measure indices of the alternating current (AC) in permanent regime. It develops experimental data-processing capacity by calculating reactance, impedance, AC power and plotting the resonance curve. It develops the ability to use units of measurement of electrical quantities as: impedance, reactance, active and reactive power. It develops the capacity of observation by highlighting side effects occurring in achieving RLC series resonance circuit voltage in (AC). Students determine the resonance phenomenon of RLC series AC circuit is characterized by:

equal absolute values of tension on reactive circuit elements;

maximum intensity of current through the circuit;

equality of inductive reactance and capacitive reactance;

circuit impedance is equal to its ohmic resistance;

active power equals apparent power;

circuit terminal voltage is equal with ohmic voltage. Questions are meant to end pre-enhance knowledge formed by performing the work.

Keywords: resistance, impedance, capacitor, reactance, Ohm’s law, phasor diagrams.

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ESSENTIAL OIL COMPOSITION AND ANTIMICROBIAL ACTIVITY OF ARTEMISIA HERBA-ALBA ASSO GROWN IN MOROCCO

B. IMELOUANE, A. El BACHIRI, M. ANKIT, K. KHEDID, J.P. WATHELET, H. AMHAMDI

Abstract: Volatile components of Artemisia herba-alba Asso essential oil obtained by hydrodistillation growing in eastern Morocco (Taforalt) were investigated by GC/FID and GC-MS. The major components were found to be camphor (43.07%), camphene (7.2%), 1,8-cineole (7.08%), filifolone (7.04%), borneol (4.88%), and bornyl acetate (3,79%).The essential oil has been tested for antimicrobial activity against Gram-negative and Gram-positive bacteria. Inhibition of growth was tested by the agar diffusion method. The minimal Inhibitory Concentration (MIC) was determined by the method of microtitration assay.

Keywords: essential oil, Artemisia herba-alba, antimicrobial activity, Morocco.

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