Search Results

1 - 10 of 12 items :

  • "correlation" x
  • Life Sciences, other x
  • Business and Economics x
Clear All
Farinograph Vs. Alveograph in Predictive Modelling of Wheat Flours Quality

correlation coefficients between rheological properties of the wheat bread doughs and baking performance of the corresponding wheat flours. Trends in food science & technology, 24(1), 13-18. Tronsmo K. M., Magnus E. M., Baardseth P., Schofield J. D., Aamodt A., FærgestadE. M., 2003. Comparison of small and large deformation rheological properties of wheat dough and gluten. Cereal Chemistry, 80(5), 587-595. Van BockstaeleF., De Leyn I., Eeckhout M., Dewettinck K., 2008. Rheological properties of wheat flour dough and the relationship with

Open access
Evaluation of Droughts and Fires in the Dobrogea Region, Using Modis Satellite Data

Abstract

Drought is one of the most significant extreme event facing the world, affecting the society and the environment. Located in SE Romania, Dobrogea Region is characterized by a temperate climate with strong continental influences, being affected by drought episodes which cause significant damages and economic costs over extensive agricultural areas. Risk reduction, continuous vegetation monitoring, and management implementation are facilitated by complementary use of vegetation indices and biophysical parameters derived from satellite products (gridded data) within-situ data (point data). The paper focuses on:i) evaluating the extent and intensity of drought in Dobrogea, Romania, based on Normalized Difference Drought Index (NDDI) and Fraction of Absorbed Photosynthetically Active Radiation (FAPAR); ii) fires analysis, based on the Thermal Anomalies/Fire locations product (MCD14DL); iii)the correlation between the fires with the NDDI; iv) and the correlation between fires with the Land Surface Temperature (LST) product. The vegetation indices, biophysical parameters and fires are computed from Moderate Resolution Imaging Spectroradiometer (MODIS) daily and eight days’ synthesis products, during 22th of March - 29th of August 2000-2015. The results highlight the areas most affected by drought (moderate, severe and extreme) and fires in the Dobrogea.

Open access
The Effect of Different Dietary Calcium Levels on Calcium Metabolism in Laying Hens

Abstract

The experiment was carried out on four groups of Hy-Line var. Brown hens (n = 350 each) fed on diets which provided 2.49, 3.07, 3.78 and, respectively, 4.15 g% calcium (Ca) during the laying period. Consequently, mean daily Ca intake was 2.74, 3.38, 4.16 and 4.60 g/cap., respectively. Ca metabolism was assayed at 20 weeks of age (start of the laying), 36 weeks of age (the peak of the laying) and 68 weeks (the end of the laying period). A significant part of the ingested Ca was not absorbed. The percentage of Ca exonerated by feces was higher at the start of the laying and lowers in the peak of laying and at the end of the laying period. The amount of Ca exonerated as unabsorbed Ca increases as the amount of ingested Ca increases inside of each age level. It was found also an increase of the Ca content of the egg shell according the Ca intake statistically significant (P<0.05) in 36- and 68-wk.-old hens, but not in 20-wk.-old hens. Blood plasma Ca showed significantly higher values in 3.38-, 4.16- and 4.60-g/day-Ca-intake groups when compared by 2.74-g/day-Ca-intake group (P < 0.05) but the level of increasing showed lowest values in hen groups with highest intake of Ca. The daily eggshell Ca export strongly correlates with the amount of daily Ca intake in 36-wk.-old hens and 68-wk.-old hens: r = +0.72 and +0.84, respectively, but no correlation was found in 20-wk.-old hens (r = -0.74, negative correlation). The results showed a limited physiologic capacity of the Ca absorption in hen, the Ca surplus being lost. Dietary Ca level should be closely correlated with the laying level of hens.

Open access
Enzyme Activity as an Indicator of Soil Quality in Sterile Waste Heap

Abstract

Recent research reports that enzymes accumulated in soil participate in the cycles of elements and contribute to soil fertility. The purpose of this paper is to determine the enzymatic activity and the humus content in the materials from waste heap in order to assess their fertility and to establish possible re-cultivation technologies. The investigations were carried out on materials from the Pesteana North waste heap. In order to achieve this, the activity of catalase, invertase, urease and phosphatase activity was determined in different plots of the heap during the summer and as a control the zonal soil was used. Enzymatic activities were colorimetric assay using appropriate substrates. The obtained results show a large variation in the values of the determined enzymatic activities. In all investigated plots, all enzymes are found to be lower than those determined for the zonal soil. A strong positive correlation is observed between enzymatic activities of catalase and invertase and the accumulation of humus which demonstrates that enzymatic activities has a useful tool for studying the evolution of heap materials to agricultural soils.

Open access
Behavior of Blackberry Varieties in the Central Area of the Republic of Moldova

Abstract

The aim was to evaluate the influence of the Arapaho, Thornfree and Triple Crown varieties in condition of the Republic of Moldova on main phenophases of the development of the blackberries plants, quantity of fruits, their average weight, productivity of the blackberry plantation and their economic productivity according to the biological particularities of the variety. The study subject of the experience was the Arapaho, Thornfree and Triple Crown blackberry varieties. The distance of plantation is 3.0 × 1.5 m. The experimental plot it was placed in the „Pomrubus” Ltd. founded in 2014 year. The research was conducted during years 2016-2017. During the research, it was studied the phenophases of the development of the blackberries plants, quantity of fruits and their average weight, productivity of the plantation and economic efficiency of the production of blackberries. During the analyzed period, it was established that the phenophases of the development of the blackberries plants, quantity of fruits, their average weight, productivity of the plantation and economic efficiency of the production was in direct correlation with the biological particulates of the studied varieties of the blackberry.

Open access
Impact of salt reduction on the number of microorganisms and a sensory analysis for Kranjska sausages during their shelf-life

Abstract

Salt is an important ingredient in the production of meat product. Any reduction of salt requires a special treatment. This study was conducted to evaluate the effect of salt reduction on the growth of microorganisms in Kranjska sausages during their shell-life and to carry out a sensory assessment. The 18 lots of sausages were prepared under salt-reduced (1.6%) and control (2.3%) salt concentrations, directly on the production line. A total of 85 sausages were analysed and the data were used for the comparisons of groups (ANOVA) and to detect the significant variables (polynomial models) influenced on the total number of microorganisms (TNMs). The significant differences were determined between the lots (representing the microbiological status of the stuffing), between the salt-reduced samples and control samples, and between the different humidity levels. The correlations and significant relationships were determined between the TNMs and the lots, the salt concentrations, and the relative humidity. The polynomial models were to general to be used for the prediction. For sensory analysis implemented on 40th day 18 sausages were assessed. The reduction of salt resulted in lower scores in the sensory evaluation. The less-salted sausages contained more microorganisms.

Open access
The Influence of Nitrogen Fertilization and Fungicides Treatments on Yield and Quality Obtained from Various Premium Wheat Varieties

Abstract

This study analyzes the results obtained during the agricultural year 2015-2016 on the PHD thesis research field and was carried out on a series of 6 wheat varieties (Triticum aestivum L.), of which 5 Premium wheat varieties and one Class A variety. The purpose of this research is to stimulate the expansion of Premium wheat varieties surfaces in Romania. Due to the superior quality of the grains (protein> 14.5%) their use in bakery, will reduce the use of synthesis enhancers. The location of the experimental field was carried out in Draganesti-Vlasca area, at SCDA Teleorman. The aim was to establish optimal technology to maximize the quantity and quality of the yield. Given the crop rotation after peas, the behavior of the wheat varieties was observed on different nitrogen doses. There were applied 3 fertilization fractions with nitrogen (N1-N3) and 3 treatments with fungicides (V1-V3). Determinations of the main foliar and spike diseases were made. The correlation between fertilizer and fungicide treatments showed the differences between yield potential and disease tolerance of the analyzed varieties.

Open access
Effect of Canopy Structure on Water Use of Wheat (Triticum Aestivum L.) During Post-Anthesis Stage

Abstract

Wheat, being the main crop in Mediterranean type environments, is grown during winter under rainfed conditions and its yield potential is mostly affected by the amount and distribution of rain. This study is conducted at experimental fields of Ege University, Department of Field Crops in Izmir-Bornova which is characterized as Mediterranean type climate conditions during 2011/2012 and 2012/2013 growing season. Totally 9 canopy structures were generated by different row and line distances. Plant height, total dry weight, tiller number, harvest index, spike number, grain number per spike, thousand grain weight and grain yield were determined after harvest time while digital leaf area index and soil moisture contents were monitoring during specific growth periods to evaluate changes in soil water status by different canopy closer. Increasing in sowing density by different row and in-line distance reduced tiller and spike number per plant. On the other hand, grain number per spike and thousand grain weights were significantly affected by in-line distance instead of row distance. Higher grain yield were obtained from 20x1 cm treatments. Canopy cover speed determined using with digital imaging was not remarkable correlated (r=0.06) with soil moisture content during post-anthesis stage of wheat when higher rain amount is recorded in 2012. However, there was a significant negative correlation (r=0.51) between canopy cover speed and soil water status during post-anthesis stage when the rain amount is limited in 2013. We may suggest that rapid canopy cover lead to negative effect on soil water status via higher transpiration if the rain is limited during post-anthesis stage of wheat.

Open access
Extreme Dry Years in the 21st Century at the Level of the Agricultural Areas of Muntenia, Romania

Abstract

The global climatic changes consisting of the increased in the average air temperature and changes in the rainfall regime have led in the last decades to the extension of the agricultural areas affected by the drought phenomenon, both worldwide and in Romania. During the last half century, the drought and the phenomena associated with it, namely aridization and desertification, are a major problem for mankind. The limiting factor affecting field crops on the largest surface is the drought, the extent and intensity of this type of risk causing annual reduction of agricultural production by at least 30-50%. Drought represents the natural phenomenon determined by the amounts of precipitations below the normal values. The absence of rainfall is due to the predominance of the anti-cyclonic type. The most frequent phenomena occur in the extra-Carpathian agricultural regions of southern and south-eastern Romania Muntenia is located in the drought-sensitive area, where the influx of continental anti-cyclones is higher. Although this phenomena is possible in all seasons and in all agricultural areas, it doesn’t occur simultaneously and doesn’t have the same intensity. In the 21st century, the agricultural years 2001-2002, 2002-2003, 2006-2007, 2011-2012 and 2014-2015 are included in the list of the most recent years in terms of rainfall quantities, the heat units recorded in the warm season, as well as the soil moisture reserve available to winter wheat and maize plants during maximum water consumption. The objective of this paper is to highlight the correlation between the pluviometric regime analyzed during periods of maximum consumption of water from winter wheat and maize crops, the phenomenon of "heat" and the soil moisture reserve. The analysis of these specific indices helped us characterize the mentioned agricultural years, in the context of analysing the phenomenon of pedological drought with an impact in agriculture in Muntenia Region. An important element in the development of agricultural management strategies is to improve scientific knowledge and capacities to better manage climate variability by examining climate data and risks and opportunities analysis. The decrease in production of winter wheat and maize wheat crops occurs in extreme dry agricultural years due to the shortening of the vegetation season as a result of the increase in air temperature and water stress during the period of accumulation of the dry matter in the grain (the filling phase grain) caused by the reduction of precipitation amounts. Drought periods are increasingly common in Romania and are a major problem for agriculture with high impact on the agricultural production.

Open access
Preliminary Study Regarding the Additional Effect of Adding Antioxidants on Bull Frozen Semen

., Dimitrijević V., Savić M., Jeremić, Vuković D., Čobanović N., Obradović S., Petrujkić B.T., 2017 - The correlation between selected computer assisted sperm analysis parameters and bull fertility. Veterinarski arhiv, 87(2):129-137. Erickson L., Kroet T., Anzar M., 2016 - Relationship between sperm apoptosis and bull fertility: in vivo and in vitro studies. Reproduction, fertility and development, 28(9):1369-1375 Hoflack G., Opsomer G., Rijsselaere T., Van Soom A., Maes D., de Kruif A., Duchateau L., 2007 - Comparison of computer-assisted sperm

Open access