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Evaluarea compuşilor fenolici prin metode spectrometrice ecologice
Get PDFThe study aimed to analyse phenolic compounds from wine samples using “ecological” spectrometric methods (low consumption of chemical reagents) comparing a traditional UV-VIS spectrophotometer to a microplate reader spectrometer. Different experimental wine samples were obtained using active charcoal, gelatine and anionic resins. The used wines were produced from Fetească neagră grapes harvested at full maturity from Şuletea region, Vaslui County, with approx. 290 g/L concentration in fermenting substances.A total of 43 samples were analysed. The microplate reader was shown to be an extremely efficient and economic tool for analysing wines as the linearity of the used methods was shown to be comparative between devices. The time required for analysis is considerably reduced in this case and the versatility of the method allows better statistical evaluation of parameters within the limit of 10% of the relevant significance
Studiul germinaţiei seminţelor ca etapă tehnică în producerea legumelor de tip microgreens
No full textThe paper addresses research on the possibility of optimizing the production of "microgreens", by assessing the seed germination regimein radish (Raphanus sativus L. convar. sativus) depending on different temperatures: 15°C, 20°C and 25°C. The results show that there are no significant differences for this species for the three types of temperature studied
Biopesticidele -o nouă provocare pentru asigurarea calităţii alimentelor şi pentru o agricultură sustenabilă
No full textThe pesticides represent one of the most toxic compounds that affect the human health, these compounds having mutagenic and carcinogenic effects. One of the way by these compounds can get into the human body are the food. The use of biopesticides in the plants growth is part of the concept of "sustainable agriculture". Various biologically active compounds from plant sources have been shown to exhibit high efficacy, multiple mechanism ofaction, low toxicity to mammals, which has led to increased the interestin using them as biopesticides in a stabilized form and easy to handle.The aim of this paper is the studyof some vegetal extractswith potential repellent effect, from the spontaneous flora of Moldavia/Bucovinain combating the pests
Rural development approach in Romania's sustainable development strategy 2014-2020
No full textIn the paper we will analyze the evolution of the Romanian agriculture at national and especially regional level, in the
context of its alignment with the European Union standards, is very important because we are facing a certain
compatibility dilema between the new Community Agricultural Policy 2014-2020, (high technical performance, the
presence of important stocks of agricultural products, etc.) and the state of Romanian agriculture, which has other
objectives (profound restructuring and consolidation of farms, massive financial support for increasing technical and
economic returns, balancing agri-food balance, etc.). The present analysis aimed at highlighting the structural and
dynamic evolutions of the main indicators that characterize the agriculture of Romania during the period 2011-2016,
namely: macroeconomic indicators; production structures; cultivated areas and livestock; agricultural crop and animal
production; prices of agricultural products. In Romania, the first Sustainable Development Strategy was implemented
between 1997 and 1999 and was revised in 2008 (Sustainable Development Strategy 2013-2020-2030). In 2013, the
National Strategy for Regional Development 2014-2020 was developed, which includes several aspects of ensuring
sustainable development. In 2014, the Strategic Guidelines for Sustainable Development of the Carpathians (2014-
2020) were approved
Essential oil composition of Thymus Fedtschenkoi ronniger at different growing altitudes in Mazandaran, Iran
No full textThymus fedtschenkoi
Ronniger (Lamiaceae) is a permanent, that
grows in some mountain rangelands of Iran,
including Mazandaran province. The aerial
parts of Thymus fedtschenkoi were collected
during flowering stage in June 2012, from
mountain rangelands of Mazandaran
province, in north of Iran. Samples were
collected from five altitudes (1300 m,
1600 m, 2000 m, 2400 m and 3000 m) in
mountain region of Mazandaran province.
The goal of current research was to
assessment the effect of altitude on the
chemical composition and function of
essential oil in Thymus fedtschenkoi. The
essential oil were obtained by
hydrodistillation and analyzed by gas
chromatography (GC) and gas spectrometry
(GC-MS). Based on the results, the essential
oil content is between 0.92-1.31%, at
different altitudes. The highest content of
essential oil (1.31%%) was extracted in the
highest altitude (3000 m), while it was
opposite (0.92%) in the lowest altitude
(1300 m). The main essential oil compounds
of Thymus fedtschenkoi samples were
thymol (8.62%-36.86%), carvacrol
(6.787%-68.39%), γ-terpinene (1.473T-
6.461%), p-cymen (5.764%-16.204%) and
linalool (0.465%-6.457 6.8%). According to
the results, altitude has a positive effect on
the percentage of essential oils and essential
oil increases with increasing altitude. The
altitude has a negative effect on the
percentage of thymol and the content of
thymol decreased with increasing altitude.
The altitude has a positive effect on the
percentage of carvacrol and the content of
carvacrol increased with increasing altitude
Provisional technology of capitalization of liquid wine yeasts as fertilizers for grapevines
No full textThe paper describes a provisional technology of capitalization of liquid wine yeasts as fertilizers for grapevines. Every year in the country from 100 wine enterprises are accumulated about 16,000 tons of liquid wine yeasts. They are discharged into the environment (what is prohibited), causing damage to aquatic basins and soil. As a result of the scientific investigations, has been found that liquid wine yeasts must be included in the agricultural circuit by using them as a fertilizers
Considerations on some polytunnels soil characteristics that favor the non-parasitic disorder blossom-end rot on tomatoes
No full textBlossom-End Rot is a non-parasitic physiological disorder found in tomatoes, peppers, eggplants, and some melons. It
occurs due to a low level of calcium in soil and high fluctuation of available water .Thus, a calcium deficiency occurs
during fruit maturation, which lead to lesions. The affected area can cover up to half fruit. This disorder can also occur
when there is an excess of calcium in the soil. Most of the water is lost by evapotranspiration and the calcium
accumulates into the leaves. Fruits do not transpirate as much as leaves, so less calcium is stored in the fruit, resulting in
a calcium deficiency in fruit. Another favorable factor is over-fertilization with some nutrients. One of the objectives of
the paper is the soils characterization on which have been identified plants affected by Blossom-End Rot. It were
studied greenhouses and polytunnels soils from several locations (Barlad, Spataresti-Falticeni, Bacau) in North-Eastern
Romania. Following the investigations, it was found that the symptoms on tomatoes were not due to a parasite action. In
the areas where Blossom-End Rot was identified, soil profiles were developed and analyzed. In the laboratory were
determined some properties of soil samples taken. The analytical data obtained in the laboratory reveals that this
disorder occurs on soils with a coarse texture, sand and loamy sand soils, moderate acidic, with a very low acidification
buffering capacity, located in the marginal areas of the polytunnels. The correct identification and differentiation of
Blossom-End Rot from gray rot caused by the pathogen Botrytis cinerea, presents a particular practical importance in
order to establish prevention measures and cultural recommendation
Application of HACCP (hazard analysis critical control point) to cow telemea cheese production
No full textNowadays, Hazard Analysis of Critical Control Points (HACCP) has become a prerequisite for transactions involving food products. Application of HACCP system in the cheese making industry proved to be beneficial and profitable, influencing consumer confidence by producing safe cheese with consistent quality. Cow TELEMEA is a ripened cheese which due to its composition (moisture, salt level) and properties is susceptible to contamination. The aim of this study was to detail the flow diagram, to assess physical, chemical and biological hazards and to identify critical control points for cow TELEMEA cheese on processing line. The results have revealed that physical, chemical and biological hazards may occur during processing and four critical control points were found: raw milk reception, raw milk storage, milk pasteurization and cold storage of cheese
Un model matematic al creşterii bacteriilor utilizând comunităţile bacteriene din sol
No full textA bacterial growth model is presented starting from the Malthusian model of exponential growth. Considering the growth rate being a linear function, we can express it using the bacterial tolerance grade over different conditions. Resolving the obtained differential equation, we plot the growth of the bacterial population for the studied initial conditions. The numerical increase of soil bacterial population cultivated on common microbiological growth media (Potato dextrose agar –abbreviated PDA) is studied
Evaluarea preciziei şi acurateţii unei metode spectrofotometricede măsurare a concentraţiei compusului activ în forme farmaceutice
Get PDFA spectrophotometric method in visible range measuringthe active compoundcontent of pharmaceutical tablets was developed and proposed to be validated and applied. The analysis method was highly precise(presenting the relative standard deviation values within the accepted range of values, RSD ≤ 5%), and highly accurate(presenting the average recovery and average relative error value located within the accepted range of values, Xdm≤ 5)