bluuebunny/crossref_metadata_2025 huggingface dataset:
Patterns of Antihypertensive Treatment in Patients with Acute Severe Hypertension from a Nonneurologic Cause: Studying the Treatment of Acute Hypertension (STAT) Registry
Authors: Devlin John W , Dasta Joseph F , Kleinschmidt Kurt , Roberts Russel J. , Lapointe Marc , Varon Joseph , Anderson Frederick A. , Wyman Allison , Granger Christopher B. ,   On behalf of the Studying the Treatment of Acute Hypertension (STAT) Investigators
Published: October 2010

Study Objective. To assess antihypertensive treatment practices and outcomes for patients with acute severe hypertension requiring hospitalization.

Design. Subanalysis of a multicenter, observational, cross‐sectional study.

Data Source. The STAT registry (data from 25 hospitals).

Patients. A total of 1184 consecutive adults with acute severe hypertension (systolic blood pressure [SBP] ≥ 180 mm Hg, diastolic blood pressure ≥ 110 mm Hg), without a neurologic reason for admission, receiving two or more intermittent intravenous antihypertensive doses or a continuous intravenous infusion within 24 hours of hospitalization.

Measurements and Main Results. Patients started intravenous antihypertensive therapy 1.3 (median [interquartile range (IQR) 0.5–3.2]) hours after the qualifying SBP (median 204 [IQR 190–221] mm Hg). Labetalol (27%), metoprolol (21%), and nitroglycerin (20%) were the most frequent initial intravenous choices. For the 43% of patients administered two or more intravenous agents sequentially, the 24% receiving three or more, and the 8% receiving four or more, median SBPs at the time of the second, third, and fourth additions were 186 (IQR 168–211), 176 (IQR 152–196), and 164 (IQR 143–193) mm Hg, respectively. Most common continuous intravenous infusions were nitroglycerin (30%), nicardipine (13%), and labetalol (7%). After the first intravenous agent, an SBP decrease of 10–25% was achieved at 1 and 6 hours in 48% and 72%, respectively. Of the 6% without at least a 10% decrease in SBP during the entire hospitalization, labetalol (28%), hydralazine (21%), and metoprolol (17%) were the most frequent initial intravenous choices. Hypotension (SBP ≤ 90 mm Hg) occurred in 5% and was most common with intravenous nitroglycerin (39%). Oral antihypertensives were started within 1 and 6 hours after the first intravenous therapy in 13% and 34% of patients, respectively, with many patients (61%) receiving three or more oral agents during hospitalization.

Conclusion. Pharmacologic treatment of acute severe hypertension in patients with nonneurologic causes is heterogeneous and often not consistent with Joint National Committee recommendations. Patients received numerous intravenous agents, experienced variable decreases in SBP, often failed to receive timely oral therapy, and a clinically relevant proportion developed hypotension.
Trisodium Citrate: An Alternative to Unfractionated Heparin for Hemodialysis Catheter Dwells
Authors: Pierce Dwayne A. , Rocco Michael V.
Published: October 2010

The use of tunneled hemodialysis catheters, or permcaths, either for temporary dialysis access before arteriovenous fistula or arteriovenous graft maturation or for long‐term dialysis access, is associated with increased risk of catheter clotting and infection. Catheter locking solutions are routinely used to maintain patency in these catheters between dialysis sessions. Unfractionated heparin has traditionally been used for this purpose; however, trisodium citrate (also known as sodium citrate or citrate) has recently been shown to be an efficacious alternative to heparin as a locking solution. Citrate exerts both its anticoagulant and antimicrobial properties by chelating calcium to disrupt the normal coagulation pathway and by interfering with the formation of biofilm and the bacterial cell wall. Citrate is at least equivalent to heparin as an anticoagulant and antimicrobial agent for catheter locking, and in some clinical studies citrate was shown to be superior. Two different concentrations of sodium citrate were previously available; however, concerns of safety led to the removal of citrate 46.7% from the United States and Canadian markets in 2000, leaving only citrate 4% available for use as a catheter locking solution. The systemic hypocalcemic effects that were reported with citrate 46.7% have not been observed with citrate 4% in clinical trials, and the risk of systemic anticoagulation and bleeding was shown to be lower than that with unfractionated heparin. In addition, most comparative cost data indicate that citrate is a more cost‐effective alternative than heparin; however, costs can vary by institution. Despite inconclusive evidence of clinical superiority, citrate 4% appears to provide a safe and at least equivocal alternative to heparin as a catheter locking agent.
Diabetes Mellitus and Increased Risk of Cancer: Focus on Metformin and the Insulin Analogs
Authors: McFarland M. Shawn , Cripps Rebecca
Published: October 2010

Type 2 diabetes mellitus has been associated with an increased risk of hepatic, pancreatic, colon, endometrial, breast, and bladder cancer. Although a mechanism of action for the increased risk has been postulated, no definitive evidence has been completely elucidated in the medical literature. Results of recently released studies documented the use of specific antidiabetic drugs with increased rates of cancer. The insulin analog glargine was the focus of four observational studies published in 2009 that outlined an increase in the rates of cancer associated with its use. In contrast, the use of metformin has been shown to possibly decrease the rate of specific cancers when used in the treatment of type 2 diabetes. These data regarding cancer risk and antidiabetic drugs are contradictory and at this time are inconclusive. Until results of long‐term randomized prospective studies are available to elucidate a correlation with cancer and insulin, we must continue treating diabetes in order to avert the long‐term complications of the disease.
Designing the Efficient Information-Processing Organization
Authors: Jun Tackseung , Kim Jeong-Yoo
Published: October 2010

We model a hierarchy consisting of a fixed number of heterogeneous agents, each of which reports (possibly distorted) information to its direct superior who can detect and correct the misreport with some probability. Two problems are simultaneously considered: designing the efficient hierarchy structure and configuring the agents who are heterogeneous in their trustworthiness. We develop the Unimprovability Principle, which is an analogy of Bellman Principle. By applying the principle, we show that efficiency requires only the least reliable agent in any rank to have subordinates.
Investigation of methods for Fe, Mn and Zn solubility in the smonitzas of Serbia
Authors: Milivojevic Jelena , Jakovljevic Miodrag , Jelic Miodrag , Boskovic-Rakocevic Ljiljana
Published: October 2010

The methods for estimating Fe, Mn and Zn solubility in smonitzas over Serbia (ten localities) used as fields and meadows, were studied in this paper. The total contents of these elements were found to be nearly equal to their mean values in the world soils. Regarding their availability, investigated smonitzas were found to be well supplied with manganese and, for the majority of samples, with iron. But, deficiency of iron in the soil were found in 25% and zinc in 65% of analyzed samples, after a more sensitive DTPA method had been used. A certain number of positive or negative correlations between the total and the available contents of the elements studied and some basic properties of the smonitzas were obtained, which is in agreement with the behavior of these elements in the soil.
Mobile nickel content in calcareous black soils of Rajac
Authors: Djordjevic Aleksandar
Published: October 2010

A description of mobile Ni contents in various subtypes of calcareous black soils from the area of the mountain massif of Rajac, is given in the present paper. A hundred soil samples were analysed in all, originating from four subtypes of calcareous black soil (organogenic, organo-mineral, brownized and loessivized black soils). The extraction of mobile Ni was carried out with 1.0 N HCl and its content was determined by atomic absorption spectrophotometry. The obtained results indicate that mobile Ni content in the investigated soils varies within a wide range, from 5.0 to 251.3 mg/kg that it is very seldom (only in 3% of the investigated samples) within the range from 5 to 7 mg/kg, that in over 90% of the 100 investigated samples it is higher than 10 mg/kg, and in almost 3/5 of the samples it is higher than 20 mg/kg. Calcareous black soils of Rajac massif have much higher mobile Ni content than previously investigated black soils from calcareous massif of Rtanj, which is, by all means, only partly due to their more severe dealkalization and acidification. In addition, here is undoubtedly apparent the influence of the geological substrate, i.e. of serpentine rocks that border the calcareous massif of Rajac.
Effect of potassium fertilization on its available and fixed content in vineyard soil
Authors: Licina V. , Markovic N.
Published: October 2010

The experiment was conducted on brown forest soil in the vineyard with Sauvignon blanc variety on Kober 5BB rootstock. During a thre- year experiment (1994-1996), potassium fertilizer was added in a dose of 0 kg K2O/ha, 50 kg K2O/ha, 100 kg K2O/ha, 150 K2O/ha respectively. After the determination of soil potassium content (1870-1920 mg K2O/100 g), its available form was monitored by using two different extraction methods (AL method and 1N ammonium-acetate extraction). The amount of extracted available K was not significant between the used methods, while the effect of fertilization was visible only at 150 kg/ha potassium rate during the first year in soil layers (30-60 cm, 60-90 cm). Also, another examined soil K fraction (fixed K+) was not affected by K fertilizer application.
The influence of various factors on milk clotting time
Authors: Jovanovic Snezana , Macej Ognjen , Djurdjevic-Denin Jelena
Published: October 2010

The influence of pH (6.5 and 5.8), amount of added CaCl2 (0, 200 and 400 mg/l)), coagulation temperature (30?C and 35?C) and heat treatment of milk (65?C/30 min and 87?C/10 min) on the rate of rennet induced milk coagulation (s) were investigated. The time (s) from rennet addition to onset of gelation (as indicated by the first visible floccules) was measured. The milk samples heat-treated at 87?C/10 min, with 400 mg/l added CaCl2, which were coagulated at 35?C and pH 5.8, coagulated 23.28-fold faster than the same samples without added CaCl2, which were coagulated at 30?C and pH 6.5. The results of investigations related to the influence of particular coagulation factors on the coagulation rate of heat-treated milk showed that at pH 6.5 the most pronounced influence was demonstrated by the amount of Ca2+ and temperature of coagulation. At pH 5.8, different amounts of Ca2 and used temperatures of coagulation did not influence coagulation rate regardless of the used heat treatment of milk. The influence of used heat treatment of milk was particularly pronounced during coagulation of samples without added CaCl2 that coagulated at 30?C and pH 6.5. The used heat treatment of milk practically did not influence the milk coagulation rate at pH 5.8. The greatest influence on milk coagulation rate was showed by pH. This influence was the most marked in coagulation of samples in which the coaggregates were formed, regardless of the amount of added Ca2+ and used coagulation temperatures.
The influence of GDL concentration on milk pH change during acid coagulation
Authors: Fetahagic Safet , Macej Ognjen , Denin-Djurdjevic Jelena , Jovanovic Snezana
Published: October 2010

Skim milk powder was reconstituted to obtain milk A (with 8.01% TS). Milk A was standardized with 3% of skim milk powder and 3% of demineralized whey powder (DWP), respectively, to obtain milk B (with 11.15% TS) and milk C (with 11.10% TS). Milk samples were heat treated at 85?C/10 min, 90?C/10 min and 95?C/10 min, respectively. Untreated milk was used as control. Acidification was carried out at 25?C, 35?C and 45?C during 240 min with GDL (glucono-d-lactone), namely with the amount of 0.5%, 0.75%, 1.0%, 1.25% 1.5%, 1.75%, 2.0% and 3.0% of GDL, respectively. The results showed that all investigated factors, explicitly GDL concentration, acidification temperature and applied heat treatment of milk as well as added DWP influence the change of pH during acidification. Milk samples standardized with DWP had smaller buffer capacity and faster change of pH than samples standardized with skim milk powder. Only at acidification temperature of 25?C, added DWP did not influence the change of milk buffer capacity regardless of the change of casein:whey protein ratio. Under this acidification condition, both milk samples standardized with skim milk powder and DWP had similar final pH values.
Determining the lower limits of irrigation capacity use
Authors: Gogic Petar
Published: October 2010

The objective of the study was to determine the limits of economic justification for irrigation system capacity use. The first step was focused on determining the lower limit of capacity use by comparing the economic effects of irrigation with the costs of the irrigation system use. In addition, while determining these limits the need was stressed to consider the economic effects of irrigation by optimizing the production structure and the modes for limit determination under irrigation and non-irrigation conditions. Eventually, the empirically verified possibility stating that this limit may be determined by comparing the water processing prices with its cost price is given. The limit was found to be the point at which these two prices equalize.
A chaotic growth model of agricultural population
Authors: Jablanovic Vesna , Lakic Nada
Published: October 2010

Using the autoregression models, the paper considers movement of agricultural population. Irregular movement of agricultural population can be analyzed within the formal framework of the chaotic growth model. The basic aims of this paper are: firstly, to set up a chaotic growth model of agricultural population; and secondly, to analyze the stability of agricultural population movement according to the presented logistic growth model in the world and eight group of countries in the period 1967-1997.
The influence of basic meteorological elements and seeding density on yield and quality of fenugreek seed (Trigonella foenum graecum L)
Authors: Glamoclija Dj. , Maletic Radojka , Jevdjovic Radosav
Published: October 2010

Results of two-year investigations (2000 and 2001) on the influence of seeding method and basic meteorological elements (precipitation and temperature) on yield and quality of fenugreek seed (Trigonella foenum graecum L) are presented in this paper. Considerably higher yield of fenugreek seed in all variations was obtained in the second study year which was probably caused by more favorable precipitation during vegetation period. Average temperature during vegetation period was similar in both study years, therefore it could not have influenced significantly the differences in yield and quality of seed. The highest seed yield was achieved in both study years in case of seeding method with 50 cm distance between seeding rows and 10 cm distance between plants in a row. Reduction of the distance below 50 cm caused more significant decrease of seed yield compared to the condition when the distance was increased. Similar results were obtained by Rajcic and Jockovic (1990) in soybean, Lugic et al. (1996) in red clover and Slowinsky et al. (1996) in alfalfa production to be used as seed raised on vegetation areas of different surfaces. The conclusion was that raising plants in higher density caused considerable decrease of seed yield. Fenugreek seed produced in the year 2000 had lower absolute mass, but better germination energy, as well as total germination, compared to the second study year despite better conditions of natural moisterizing. Concerning variations of distance between seed rows in both study years fenugreek seed obtained from 50 x 10 cm variation had best quality traits.
Fluorine content in soils of Northern Pomoravlje
Authors: Jakovljevic Miodrag , Blagojevic Srdjan , Antic-Mladenovic Svetlana
Published: October 2010

Soil sampling was carried out in the Velika Morava river valley, covering the area from Velika Plana to the mouth of Morava to the Danube. The composite soil samples, representing alluvial soils (22 samples), cambisols (14) and smonitzas (4), were taken from plough layers, based on a regular square grid with intervals set at 5x5 km, covering total area of 100,000 ha. The total and available fluorine contents were determined in the soils samples. The highest average amount of total fluorine was found for alluvial soils (391 mg kg-1), then for smonitzas (348 mg kg-1) and the lowest one for cambisols (285 mg kg-1). These amounts are within normal fluorine content for soils (150-400 mg kg-1), although the maximum found levels were even about 500 mg kg-1. The available fluorine content was very low (< 1 mg kg-1), being mostly less than 0.2 % from its total amount, so it could be concluded that there was no danger from fluorine accumulation in the plants. Statistically significant correlation coefficient between total and available fluorine contents was not obtained. The total and available fluorine contents have mostly been in the correlation (with positive sign) with soil pH and the content of mechanical fraction silt+clay. Significant correlation coefficients between total fluorine content and the content of some heavy metals (Cr, Ni, Co, Cu, As) were also found, which indicated their mutual geochemical origin.
The determination of potential ammonification in soil by arginine method
Authors: Kresovic Mirjana , Licina V.
Published: October 2010

In this paper investigations were carried out on two soil types (vertisol and brown forest soil) with different doses of applied N-fertilizer: diameter, N60 N90; N120 and N250. The potential ammonification in soil was obtained by arginine method. The following properties of soil were determined: pH value organic C, available NH4-N and mobile-Al. The pH value in vertisol was 3.75-4.07; mobile-Al was 0.67-4.90 mg/100g; % organic C 1.38-1.46 and the content of available nitrogen was 4.4-11.2 ppm. The amount of released NH4-N by arginine ammonification in this soil type was very low [(-0.12)-0.27mg/g-1h-1]. Correlation coefficients between released NH4-N from arginine and soil pH were (-0.96*), mobile Al - (-0.99**), applied fertilizer doses - (-0.95*). In brown forest soil the amount of released NH4-N by arginine ammonification was greater than in vertisol, ranging from 3.16 to 7.11mg/g-1h-1. Correlation coefficients between soil properties and released NH4-N from arginine were not statistically significant.
Biological and serological characterization of viruses of summer squash crops in Yugoslavia
Authors: Dukic Natasa , Krstic Branka , Vico Ivana , Katis N.I. , Papavassiliou Chryssa , Berenji Janos
Published: October 2010

A survey on summer squash open field crops was carried out during 2000 and 2001 in order to identify the major viruses infecting these crops in different localities. Plants showed different types of symptoms: mild mosaic, chlorotic spotting, distinctive mosaic, blistering of leaf lamina leaf yellowing, deformation of leaf lamina, knobbed fruits and stunting of plants. The symptoms were very variable but showed the viral nature of the investigated summer squash diseases. The collected samples were tested by bioassay and by two serological methods ELISA and EBIA using cucumber mosaic cucumovirus (CMV), zucchini yellow mosaic potyvirus (ZYMV), watermelon mosaic potyvirus 2 (WMV-2), zucchini yellow flack potyvirus (ZYFV) watermelon mosaic potyvirus 1 (WMV-1), squash mosaic comovirus (SqMV) and cucurbit aphid-borne yellows polerovirus (CABYV) polyclonal antisera. In all tested samples single or mixed infection with ZYMV, CMV and WMV-2 was detected. The most prevalent virus infecting summer squash was ZYMV. This is the first report of ZYMV, the most destructive virus infecting cucurbits, in Yugoslavia. It was also proven that the identified viruses are transmissible by Aphis gossypii in a non-persistent manner, but possible role of seed in virus transmission was not confirmed.
Quality of potatoes grown in various regions of Serbia as influenced by heavy metal and pesticide residues concentrations
Authors: Rajkovic Milos , Peric Lidija , Kovacevic Divna
Published: October 2010

It is possible to decompose starch into monosaccharides by the method of acid starch hydrolysis. By applying appropriate chemical procedure, a main solution is obtained, from which aliquots are taken after filtration to determine of the present glucose according to Luff-Shoorlu method. The analysed potatoes of cv. Desiree, grown on various sites in Serbia, have starch content that corresponds to available literature data. The highest starch content is found in potatoes from Ivanjica and Novi Pazar, i.e. from the areas where climate factors, air temperature, and land relief are favourable for potato growing. Lower starch contents are found in potatoes grown in flat areas with warmer climate and drier periods. Those are sites in PKB-Belgrade, Smederevo, Dobanovci and Mrcajevci areas, where the values obtained by experimental procedure are very similar. The lowest starch content is found in potatoes from Belegis and Guca sites, where starch content is lower than normal from literature values, which may be explained by some special causes (climate, location, irrigation). On the basis of heavy metal contents in potato samples, it may be concluded that potatoes originating from sites famous for potato production are contaminated with Cd the content of which exceeds concentrations permitted by regulations. The presence of Cd in potato samples may also be explained by the application of phosphate fertilizers in higher (or recommended) rates. However, the soil itself should also be investigated, especially concerning the content of Cd and pH value. Thus, the influence of the soil itself should be established compared to fertilizer application in the current season. Presence of Cd in potatoes, on the other hand, is highly unfavourable because it prevents its utilization in nutrition, but also as a raw material for further processing of products based on potatoes: chips, etc. Also, Cd presence in foods is strictly controlled by EU, which prevents possible export of products based on potatoes containing Cd. Analyses of lindane and bensultap (Bancol) pesticides indicate that they are not within critical values, nor in such quantities to affect human health, so, from this aspect, the analysed potato samples from all sites are absolutely suitable for consumation.
Cholesterol content in meat of some Cyprinidae
Authors: Zivkovic Dragic , Peric V. , Barac Miroljub , Perunovic Marija
Published: October 2010

The aim of this paper was to examine cholesterol content in meat of five Cyprinidae species: white bream (Bllica bjoerkna L), carp bream (Abramis brama L), baltic vimba (Vimba vimba carinata Pallas), zope (Abramis balerus L) and crucian carp (Carassius carassius gibelio Bloch) from the river Danube. Cholesterol content was examined in the function of season factor and individual weight. Cholesterol concentration in meat of white bream carp bream, baltic vimba, zope and crucian carp is on average level below 20 mg/100 g of meat, which makes meat of these fish species nutritively very valuable. Cholesterol content is variable during the season. Its concentration in meat and in lipids is lowest during spring, during summer it increases and during autumn decreases, except in meat of white bream. Body weight has influence on cholesterol content when its concentration is expressed as % of cholesterol in lipids. Its content in lipids decreases with increasing of individual weight, except in meat of carp bream.
The influence of dry matter, applied heat treatment and storage period on the viscosity of stirred yogurt
Authors: Denin-Djurdjevic Jelena , Macej Ognjen , Jovanovic Snezana
Published: October 2010

Skim milk powder reconstituted to 8.44% TS, 9.65% TS and 10.84% TS respectively was used for investigation. Untreated milk and milk heat treated at 85?C/20 min and 90?C/10 min, respectively, were used for the investigation. Milk was inoculated with 2.5% of yogurt culture (containing Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus in the ratio 1:1) at 43?C. Samples were incubated until pH 4.6 was reached. Samples were immediately cooled to 4?C and held at that temperature during 14 days. Acid casein gel was stirred after 1, 7 and 14 days of storage. Measurements were done at 30 rpm during 2 min, at 20?C. According to the investigation, it could be concluded that both applied heat treatment and dry matter content influence viscosity of stirred yogurt. Viscosity increases when dry matter content increases. The smallest viscosity had yogurt produced from untreated milk with 8.44% TS, while samples produced from milk with 10.84% TS had the highest viscosity. Applied heat treatments had significant influence on viscosity of yogurt gained by stirring of acid casein gels after 7 and 14 days of storage. Stirred yogurt produced from milk heat treated at 90?C/10 min had a higher viscosity than samples produced from milk heat treated at 85?C/20 min. Storage period influenced average viscosity of stirred yogurt. Samples of stirred yogurt produced from milk with 8.44% TS showed a decrease of average viscosity during storage regardless of the applied heat treatment of milk. The highest average viscosity had samples produced from milk with 10.84% TS.
The influence of applied heat treatments on whey protein denaturation
Authors: Fetahagic Safet , Macej Ognjen , Denin-Djurdjevic Jelena , Jovanovic Snezana
Published: October 2010

Reconstituted skim milk with 8.01% DM was standardized with 3% skim milk powder and with 3% demineralized whey powder (DWP), respectively. Gained milk samples are named as 8%, 11% and 8%+3%DWP. All samples were heat treated at 85?C/10 min, 90?C/10 min and 95?C/10 min, respectively. Untreated milk was used as control. Milk samples were coagulated by glucono-d-lactone (GDL) at the temperature of 45?C until pH 4.60 was reached. Milk nitrogen matter content decreased during heat treatments, but linear relationship between applied heat treatments and nitrogen matter decreasing was not found. Nitrogen matter content of sera gained from both untreated and heat treated milk increased with the increase of milk dry matter content and with the addition of DWP. The higher temperature of applied heat treatment, the smaller sera nitrogen matter content. Nitrogen matter content in sera obtained from untreated milk were 64.90 mg%, 96.80 mg% and 117.3 mg% for milk 8%, 11% and 8%+3.0% DWP, respectively. Sera samples obtained from milk 8% heat treated at 85?C/10 min, 90?C/10 min and 95?C/10 min had 38.70 mg% 38.30 mg% and 37.20 mg% of nitrogen matter, respectively. Sera samples obtained from milk 11% heat treated at 85?C/10 min, 90?C/10 min and 95?C/10 min had 55.90 mg%, 52.80 mg% and 51.30 mg% of nitrogen matter, respectively. Sera samples obtained from milk 8% heat treated at 85?C/10 min, 90?C/10 min and 95?C/10 min had 69.50 mg%, 66.20 mg% and 66.00 mg% of nitrogen matter respectively. Distribution of nitrogen matter from untreated milk to milk sera were 12.01%, 11.14% and 17.69% for milk 8%, 11% and 8%+3.0% DWP respectively. Distribution of nitrogen matter from milk 8% heat treated at 85?C/10 min, 90?C/10 min and 95?C/10 min to sera samples were 6.99%, 6.72% and 6.59%, respectively. Distribution of nitrogen matter from milk 11% heat treated at 85?C/10 min, 90?C/10 min and 95?C/10 min to sera samples, were 6.02%, 5.32% and 5.21%, respectively. Distribution of nitrogen matter from milk 8%+3%DWP heat treated at 85?C/10 min, 90?C/10 min and 95?C/10 min to sera samples were 9.64%, 8.66% and 8.67%, respectively. Whey protein denaturation increased with increasing of the temperature of the applied heat treatment. Denaturation was the most significant for milk sample 11%.
Modelling of the operative control of plant cultivation
Authors: Szabo L.I. , Somogyi Sandor
Published: October 2010

In most farms the developments of the information systems or their elements are going on the basis of the demands of the accountancy and different reports to tax office and government. The demands of the operative managers are not taken into consideration on a suitable level. The recording of essential data on production, the making and feedback of essential reports the influence of operative decisions are insufficient because they rely on the knowledge, experience and memory of operative managers.
Effect of genotype on sugar beet yield and quality
Authors: Nenadic N. , Nedic Milan , Zivanovic Ljubisa , Kolaric Ljubisa , Gujanicic T.
Published: October 2010

The effect of a considerable number of both domestic and foreign sugar beet genotypes on root yield and quality was investigated. The data demonstrated the most favorable results of some genotypes for root yield and sugar content. Trials were conducted on rhizomania infested soil, thus tolerant genotypes were used. Susceptible cultivars represented the control. In the trial root yield was high and sugar content low. On average, in the genotypes tested, root yield varied from 73.98 to 93.30 t/ha and sugar content from 11.90 to 13.36%, depending on weather conditions. Root yield of the genotypes investigated varied from 30.61 to 112.64 t/ha and sugar content from 10.60 to 14.20%. The Swedish cultivar Dorotea (tolerant to both rhizomania and cercospora) was the most yielding. The least yielding (susceptible to both rhizomania and cercospora) was the domestic cultivar Dana.
Determining fertilizer quantities required for wheat
Authors: Kresovic Mirjana , Licina V.
Published: October 2010

In this experiment we used brown forest soil that has been used in long-term experiments, for 30 years, with increasing doses of introduced nitrogen fertilizer in variants. In order to determine the quantities of nitrogen fertilizer required for wheat, a calculation model has been applied. This calculation requires not only a reliable method for determining soil nitrogen availability (both the total and easily hydrolyzed nitrogen method were used), but also a reliable method for determining the coefficient of nitrogen utilization from soil as well as data on the coefficient of nitrogen utilization from fertilizer (Nani) for the added quantities of nitrogen fertilizer.
Some properties of Kirkham’s method for drain spacing determination in marshy - gley soil
Authors: Djurovic Nevenka , Stricevic Ruzica
Published: October 2010

The aim of this work is to present some peculiarity of Kirkham?s method applied in drain spacing determination in steady state water flow in eugley soil type. The analysis was based on data obtained by measuring water discharge from drains and water table depth. Measurements was carried out on drainage field with drain spacing of 10 m, 20 m and 30 m, representing drainage treatments I, II and III, respectively. The estimation of drain spacing is moved to lower value in all treatments. The results of analysis show meaningful limitation of method, especially in the treatments with wider drain spacing as well as in the cases of deeper ground water.
Some properties of Dagan’s method for drain spacing determination in marshy - gley soil
Authors: Djurovic Nevenka , Stricevic Ruzica
Published: October 2010

Dagan?s method as well as Kirkham?s one belong to the group of methods for drain spacing determination in steady state water flow conditions. Both methods are based on the assumption that drainage spacing (L) is linear function of water table depth and drainage discharge (h/q). The only difference can be distinguished in the values of coefficients. To dry out eugley type of soil, drain spacing is better determined by Dagan?s method in all treatments, as compared with Kirkham?s one. Advantage of this method is especially marked on the drainage system with narrower drain spacing.
Change of anthocyanins content during raspberry extraction
Authors: Vukosavljevic Predrag , Bukvic Branka , Jankovic Miodrag , Masovic Snezana
Published: October 2010

Change in anthocyanins content under different conditions of extraction enzymatic maceration and heat treatment of two raspberry cultivars (Villamette and Meeker) was determined. Experiments were carried out on a laboratory hydraulic extractor. During extraction commercial operating conditions were emulated using a "Bucher" extractor (pressure 180-200 bar 1-3 pulp shakings). A pectin preparation Klerzyme?120, manufactured by DSM France, was used for maceration and depectinization, because it is specific for "sour fruits" with pH below 3.2. At a single-stage maceration, it was applied in the amount of 200-400 g/t, for 1-2 hours at 50oC. In a two-stage maceration and depectinization, the enzyme was added as follows: in the first stage 100-200 g/t for 0.5 - 1 hour at 20oC and in the second stage 4-8 g/hl for 1-2 hours at 200C. Thermal breaks of raspberry pulp were performed at raised temperatures for 2 and 5 min in order to examine the effects of raised temperatures on anthocyanins extraction. The application of heat-enzymatic treatments of the pulp prior to extraction proved to be suitable in both raspberry cultivars. Apart from well-known degrading effects of heat on anthocyanins, the juice obtained by extraction, after enzymatic maceration, has higher anthocyanins content by 30% than the juice obtained without enzymatic maceration. Juice pasteurization, in each stage of processing, produced markedly negative effect on anthocyanins content therefore their content decreases considerably. The forms of anthocyanins that are lost most are those uncolored. In batches subjected to a two -stage enzymatic maceration, despite initial high anthocyanins content, the content of total anthocyanins is reduced after the second pasteurization to the approximate value as that in batches subjected to a single-stage enzymatic maceration.
Fungal parasitism of the cysts and eggs of the Globodera rostochiensis
Authors: Trifonova Zlatka , Karadjova Jordanka
Published: October 2010

A survey of Globodera rostochiensis infested field in Velingrad region (South-West Bulgaria) revealed the spread of a black egg disease in the old cysts. The fungus mycelium infected the embryos within the egg shell. The highest egg parasitization by fungi was observed during June (22.2%). The fungus destroyed the new progeny in September. Four species of nematophagous fungi were isolated from cysts and eggs: Botryotrichum piluliferum Sacc. And March, Scolecobasidium constrictum Abbott, Gliocladium roseum and Phoma fineti Brun.
Evaluation of agricultural land prior to and following the drainage
Authors: Gogic Petar
Published: October 2010

The study demonstrates the methodological approach to the determination of the upper limit of land value and analyzes the influence of the mode of determination of the economic effect of land use and the level of ground waters on its amount. A model was developed based on the business results of an agricultural enterprise involved in a field crop/livestock production over the past few years, which had planned to erect a drainage system in order to manage the excess of water on the available land area. In addition, a methodological approach to the determination of the land output value, i.e. the upper limit of its value was used as well. The need was stressed to start from the maximal economic effect obtained by optimizing production when determining the level. The mode of its determination under the conditions prior to and following land drainage was given as well.
The effect of vegetation area size on grass seed yield
Authors: Vuckovic Savo , Simic Aleksandar , Cupina Branko , Stojanovic Ivana , Stanisavljevic R.
Published: October 2010

This paper surveys sowing norms (row spacing and seed rate) in both our country and the world, as well as the optimal seed rates in grass seed production. It gives a short overview of row spacings and seed rates applied in our and some other countries. Earlier, grass cultivated for the purpose of seed production was grown on small vegetation area. According to some researches, high seed yields can be achieved by cultivating grass on large vegetation area. Based on the results obtained, it can be concluded that the highest cocksfoot, timothy, meadow fescue, tall fescue seed yield was achieved with plants grown in 50 cm spaced rows employing lower seed rates (8 and 4 kg/ha of seeds). The highest Italian ryegrass and perennial ryegrass seed yield was achieved with plants grown in 20 cm spaced rows employing 20 kg/ha of seeds.
Effect of buckwheat seed storage duration on its quality
Authors: Jevdjovic Radosav , Maletic Radojka
Published: October 2010

The effect of buckwheat seed storage duration on major indices of the quality was analyzed. Seed collected in 1996 and stored for 30 days (analyzed in 1996), seed stored for one year (analyzed in 1997), seed stored for two years (analyzed in 1998), seed stored for three years (analyzed in 1999) seed stored for four years (analyzed in 2000), seed stored for five years (analyzed in 2001) and seed stored for six years (analyzed in 2002) were investigated. The results of investigation have shown that seed stored up to two years had preserved its good production traits. Seed stored longer than two years have shown poor quality traits, and seed stored over three years could not be used - its production traits (germination energy and total germination) confirmed that such seed could not be used for planting. Seed stored over five years, regardless of storage conditions, had no qualitative traits, and therefore no value. It was also observed that longer storage duration induced decrease of seed mass. In regard to fractions, it was observed that smaller fractions lost their quality more quickly than medium fractions.
Changes in soil acidity depending on amelioration measures
Authors: Boskovic-Rakocevic Ljiljana , Jakovljevic Miodrag , Ubavic Momcilo , Milivojevic Jelena
Published: October 2010

The long-term use of high mineral fertilizer rates, aimed at intensifying the plant production, causes the process of soil acidification, resulting in the decrease of the yield of grown plants, due to increased contents of aluminium and manganese and decreased contents of organic matter and basic cations in the soil. In order to eliminate or reduce these harmful effects trials were set up and different materials for the neutralization of acidity and the excess of mobile aluminium were used: bentonite, zeolite, crude phosphates, MgO and CaO. The trial was set up on the pseudogley type of soil with an extremely acid reaction (pH/MKCl about 3.55) and a high content of mobile aluminium (over 37 mg/100 g soil). The obtained results show that the best effect on the decrease of all forms of soil acidity was exerted by the use of the amelioration measure CaO+MgO, with a ratio of 5:1. The application of crude phosphates and zeolite produced the weakest effect. Furthermore, the amelioration measure mentioned reduced mobile aluminium to 1.87 mg/100 g soil, and as regards three more variants (bentonite+CaO and both CaO rates) the content of aluminium was within the limits of successful tolerance for maize (about 10 mg/100 g soil).
Application of Kraijenhoff Van de Leur - Maasland’s method in drainage
Authors: Djurovic Nevenka , Stricevic Ruzica
Published: October 2010

The aim of this work is to show some properties of the application of Kraijenhoff Van de Leur-Maasland?s method for drain spacing determination in unsteady state of flow. The analysis of the method is based on data obtained from drainage field with 10 m of drain spacing which dries out eugley soil. The results of analysis show the range of method applicability as well as certain limitations in the case of non-modelled dynamics of ground water recharges.
Influence of Min-a-zel Plus on biochemical, microbiological and mycotoxicological parameters of lucerne silage
Authors: Djordjevic Nenad , Adamovic Milan , Grubic Goran , Koljajic Viliman , Bocarov-Stancic Aleksandra
Published: October 2010

Lucerne of the 5th cut in the budding phase was ensiled in the experiment as fresh and wilted (DM= 220 and 360 g/kg), with two degrees of compression (520 and 380 g/dm3) and with added Min-a-zel plus as 2 g/kg green mass. The experiment was performed as the statistical model 2K. Min-a-zel plus used as 2 g/kg green mass had no influence on biochemical, microbiological and mycotoxicological parameters of lucerne silage. Compared to the beginning material, silages had more diverse microflora and more mycotoxins. All silages had high pH values and fermentation of the acetic acid type. Some improvement was achieved with wilting of the ensiling material. The least quality (V class) was obtained with fresh lucerne, which was less compressed, while others were ranked as IV quality class. The obtained results fortify the need for further investigations in developing correct doses of Min-a-zel plus to be used in ensiling of lucerne and other materials.
Sensory properties of smoked pork loin as determined by applied additives
Authors: Zivkovic Dragic , Perunovic Marija , Popov-Raljic Jovanka , Bulatovic Aleksandar , Ivanovic Mirjana
Published: October 2010

Authors examined the effects of SUPRO 595 and GRINSTED? Carrageenan CC 250 addition on selected sensory properties of smoked pork loin. Sensory evaluation of products included an estimate of cut appearance, texture odor, taste and color. Using photoelectric tristimulus colorimeter (the MOM Color - D) determination of color characteristics in pork loin samples was carried out. The values for psychometric lightness (L*), psychometric hue redness (a*) and psychometric chrome - yellowness (b*) were expressed based on the CIELAB system. Tenderness and firmness of samples were instrumentally measured on an "INSTRON" - 4301, under the given working conditions. The variants of smoked pork loins with soy isolate were better evaluated compared to the variants with carrageenan. The results of instrumental determination of color characteristics of the products showed that between the variants with soy isolate and the variants with carrageen there existed insignificant deviation in the values of psychometric lightness (L*), in the presence of redness (a*) and in the presence of yellowness (a*). Instrumentally measured tenderness and firmness showed that the samples with carrageen were characterized by somewhat greater tenderness and firmness compared to the samples with soy isolate.
Influence of different ventilation systems on inhalable and respirable dust particles concentrations distribution in weaning and finishing fattening pig houses
Authors: Topisirovic Goran
Published: October 2010

The application of different mechanical extraction ventilation systems in reducing and controlling dust concentrations in weaned and finishing pig houses was analyzed and discussed in this work. Dust concentrations and airflow velocities have been measured at 20 measuring points, smoothly positioned over the house cross section, in the net consisting of 4 horizontal and 5 vertical rows. The lowest horizontal row was positioned at the pigs breathing zone (40 cm above the floor), and the highest (fourth) horizontal row was positioned at the workers breathing zone (160 cm). Control values were measured in houses with closed doors and windows and all the fans switched off. These values were compared with three experimental sets of values achieved with: floor, roof and both ventilation systems. Dust concentrations were measured by konimeter (Konimeter 10, Karl Zeiss Jena), airflow velocity in ventilation ducts with a turbine anemometer and the airflow velocity at measuring points with hot wire anemometer. In the finishing house significant decrement of inhalable (F = 44.35, P << 0.01) and respirable (F = 43.82, P << 0.01) dust concentration was achieved in the third experimental treatment. In the weaned piglets house, significant decrement of inhalable (F = 49.43, P << 0.01) and respirable (F = 42.69, P << 0.01) dust concentration was achieved with floor ventilation.
Business results change under effects of farm size and degree of production specialization
Authors: Bastajic Ljubomir
Published: October 2010

The study was conducted with the objective of analyzing the economic effects provoked by the change in farm size, depending on the degree of production specialization (questionnaires encompassing 30 farms of different size were used) using comparative analysis, regression analysis, correlation analysis and production function analysis. Research comprised essential parameters of business conditions on the farms and results of their business. The farms analyzed were classified according to the size of used cultivable land and degree of production specialization. In both farm groups, with different degrees of production specialization, the indices of business results were found to rise with size increase and were noticed to be the most favorable in the case of over 10 ha-farms. Comparing farms of identical size but of different degree of specialization, the following may be concluded: more favorable business results were achieved on farms with higher degree of specialization.
Ranking of Vojvodina municipalities according to multidimensional denominator of livestock production commodities
Authors: Lakic Nada , Stevanovic Simo
Published: October 2010

Marketability of livestock production was analyzed based on the marketability of both pork, beef, sheep and poultry and eggs and cow's milk. The sequential order of the Vojvodina municipalities according to the observed denominators is not identical. But, Spearman's coefficient of correlation points to a statistically very high degree of accordance between the rank-list of marketability of pork and the rank-lists of marketability of beef, poultry and milk as well as the rank-list of poultry and sequential classification of sheep meat and eggs, beef and milk. There was a statistically high correlation between the rank list of marketability of sheep meat and pork, beef and milk as well as poultry and milk. Based on the value of Kendal coefficient of ranking, it can be concluded that there exists very high degree of accordance of all the rank lists being observed simultaneously. For determination of sequential classification according to the achieved marketability of all the analyzed livestock production commodities in the sense of synthetic denominator, Ivanovic distance was used in the present work.
Influence of partial root drying on morpho-anatomical and physiological characteristics of tomato fruits: Lycopersicon esculentum l
Authors: Srdic M.
Published: October 2010

Partial root drying (PRD) is a new irrigation and plant growing technique which improves water use efficiency without significant yield reduction. The aim of the presented thesis was to investigate the effect of this technique on the growth of vegetative and generative tomato organs, and especially fruits, its influence on the activity of enzyme cell wall peroxidase morpho-anatomical characteristics of flower and fruit pedicels, influence on fruits yield and quality and ions distribution in tomato organs. Tomato line L-4 (Lycopersicon esculentum L) was grown in commercial compost with the root system divided equally between two plastic pots. During the vegetative and generative phases of development, one half of the root system of PRD was maintained in a dry state, while the other half was optimally watered. After 10 days an inversion was made in such a way that previously wet side was exposed to drought and dried side was watered. Obtained results showed that as a consequence of PRD treatment the growth of whole plants was reduced with fruit size and yield of PRD plants being similar to control, as well as morpho-anatomical characteristics of pedicels, ions and lycopen contents although sugar content was higher in PRD than in control plants. These results suggest that with PRD technique we can halve the demand for irrigation water and increase the nutritional value of the tomato fruit.