oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 1 )

2017 ( 2 )

2016 ( 1 )

2015 ( 12 )

Custom range...

Search Results: 1 - 10 of 269 matches for " Davor Romi? "
All listed articles are free for downloading (OA Articles)
Page 1 /269
Display every page Item
Heavy Metals Accumulation in Topsoils from the Wine-growing Regions Part 2. Relationships between soil properties and extractable copper contents
Marija Romi,Davor Romi,Gabrijel Ondra?ek
Agriculturae Conspectus Scientificus (ACS) , 2004,
Abstract: The present study analyses the effects of high copper concentrations on its mobility in the soils from the wine-growing regions of the Northwestern Croatia. The aims of this study were to determine the copper distribution in vineyard soils by single extraction procedures, and to relate the total, mobile and mobilisable copper content to several chemical soil characteristics using multiple regression analysis. The total Cu concentrations were determined by an aqua regia procedure. Two other methods were used for evaluating soil available copper: DTPA extraction and calcium chloride extraction. The physical and chemical characteristics (texture, organic C, pH, CaCO3, total P, CEC) were determined as well. Both DTPA- and CaCl2-extractable copper were largely explained by the total copper contents, and they were also highly correlated to each other. It was found that the DTPA-extractable copper decreased with increasing cation exchange capacity, but concentrations of CaCl2-extractable copper mainly depend on pH.
Comparison of Transpiration Models in Tomato Soilless Culture
Gabrijel Ondra?ek,Davor Romi,Josip Boro?i?,Marija Romi
Agriculturae Conspectus Scientificus (ACS) , 2007,
Abstract: A two-year greenhouse study was performed to determine the possibility of estimating the transpiration rate in hydroponically grown tomato on the basis of climate parameters. Transpiration rate, determined by the water balance method on different substrates, was compared to the transpiration rate calculated using the Penman Monteith equation. Regression analysis of the comparison of two different approaches to water consumption determination confirmed that the transpiration rate of greenhouse grown tomato for the studied area can be estimated with high accuracy (R2 > 0.95).
Heavy Metals Accumulation in Topsoils from the Wine-growing Regions; Part 1. Factors which Control Retention
Marija Romi,Davor Romi,Dragutin Dolanjski,Ivo Stri?evi?
Agriculturae Conspectus Scientificus (ACS) , 2004,
Abstract: The problem of exposure of agricultural soils to different anthropogenic inputs of heavy metals has been investigated in soils from two wine-producing subregions in northwestern Croatia. The aim of this study was to explore :(i) the main soil properties and topsoil accumulation of heavy metals in vineyards under long-term cultivation, and (ii) the origin and the preferential feature of metal retention in vineyard topsoil using the multivariate statistical method. The investigated area was marked on regular square grid with 1-km spacing. Topsoil samples (0-10 cm) were collected from each sampling point and analyzed for soil chemical properties, particle size distribution and heavy metal concentrations after aqua region digestion. All soil data were incorporate into the GIS base. Summary statistics of the data set were first calculated to evaluate the distributions, and afterward processed by means of R-mode factor analysis, applying the varimax-raw rotational technique. Anthropogenic input of metals in soils of the studied wine-growing regions mostly originates from agrochemicals, since the direct influence of the urban environment or industry is almost negligible. Accumulation of copper and zinc in topsoil, determined in this research, is the most common effect of continuing fertilization and protection against diseases and pests in vineyards.
Strawberry Growth and Fruit Yield in a Saline Environment
Gabrijel Ondra?ek,Davor Romi,Marija Romi,Boris Duralija
Agriculturae Conspectus Scientificus (ACS) , 2006,
Abstract: Up to 20% of irrigated arable land in arid and semi-arid regions worldwide is salt-affected. The problem of salt-affected soils is also present in the Croatian Mediterranean coastal region where seawater intrudes through porous media into calcareous aquifers, mixes with freshwater and salinizes both ground and surface waters. Climatic conditions enable continuous growing of several crops throughout a year, but increasing demand for irrigation water forces the growers to utilize water of poor quality. In 2005, the effect of rising salinity levels (control, 4, 6, and 8 dS m-1) on strawberry vegetative growth and fruit yield was studied in a greenhouse experiment. Salinity treatments had a negative effect on total fresh fruit yield (29-59%), total number of fruits (24-45%), fruit size, as well as on the number of runners (23-86%) and the length of the longest runner (1.3-2.6 times). Furthermore, NaCl salinity stress accelerated leaf senescence and reduced the strawberry growing period by 12-22 days.
The Influence of Drip Fertigation on Water Use Effi ciency in Tomato Crop Production
Vjekoslav Tanaskovik,Ordan Cukaliev,Davor Romi,Gabrijel Ondra?ek
Agriculturae Conspectus Scientificus (ACS) , 2011,
Abstract: The primary objective of this study was to determine the best irrigation and fertigation practice for tomato crop (Lycopersicon esculentum Mill.) in order to achieve highest yield with maximum water use efficiency (WUE). The field experiments were conducted during the period of May to September in 2002, 2003 and 2004. Five experimental treatments tested in this study included the following: the first three treatments (T1, T2, and T3) included a combination of drip irrigation and fertigation, treatment four (T4) included drip irrigation, but with conventional application of fertilizer, and the fifth treatment, (T5), included furrow irrigation practice with conventional application of fertilizer. The results of this study show that the drip fertigation treatments (T1, T2, and T3) gave significantly higher tomato yields in comparison with treatments T4 and T5, almost 24% and 39%. During three years of research treatments under drip fertigation showed almost 28% more water use efficiency in comparison with the treatment with conventional application of fertilizer and drip irrigation and 87% more than the treatment with furrow irrigation and conventional application of fertilizer. So, it is clear that the drip fertigation led to an increased yield, indicating enhanced water use efficiency.
Limitations of the Democratic Capacity of the Constitutional System of Bosnia and Herzegovina  [PDF]
Davor Trlin
Beijing Law Review (BLR) , 2017, DOI: 10.4236/blr.2017.81006
Abstract: In this paper, author tries to emphasize the fundamental characteristics of the positive-legal status of political regime of Bosnia and Herzegovina. Bosnia and Herzegovina has applied the model of consociational democracy (all four elements: grand coalition, mutual veto, proportionality and segmental autonomy) which excludes effective participation of citizens in decision-making. The constitutional structure of Bosnia and Herzegovina is dominated by direct democracy. It is also based on the fight of political elites. The paper discusses perspectives of direct democracy in Bosnia and Herzegovina. This paper also focuses on the possibility of merging the civil and ethnic in the functioning of constitutional-political system of Bosnia and Herzegovina. An analysis of the democratic potential of the two most important state bodies for the implementation of any democracy—legislative representative body and the constitutional court will be made.
Information Reach and Range Impact on Interorganizational Systems Platforms  [PDF]
Ismail M. Romi
Intelligent Information Management (IIM) , 2014, DOI: 10.4236/iim.2014.61001
Abstract:

Organizations tend to use information systems (IS) applications that require data to be exchanged between different parties, while data exchange is restricted with information reach and range, which determines the organizations’ IT platform. To determine the best platform, a comparison between electronic data interchange (EDI) and web services was conducted depending on certain criteria, and then we match the results with the information reach and range. The main findings show that the web services platform can take place when the range of information access is required by anyone and anywhere regardless of IT base. EDI can take place when the range of information access doesn’t exceed the organizations’ boundaries. But when the range of information access exceeds the organizations’ boundaries, still between certain partners, web services or EDI can take place, and thus the organization can select them from those platforms depending on other criteria such as security, and cost.

Thymoma in Myasthenia Gravis: From Diagnosis to Treatment
Fredrik Romi
Autoimmune Diseases , 2011, DOI: 10.4061/2011/474512
Abstract: One half of cortical thymoma patients develop myasthenia gravis (MG), while 15% of MG patients have thymomas. MG is a neuromuscular junction disease caused in 85% of the cases by acetylcholine receptor (AChR) antibodies. Titin and ryanodine receptor (RyR) antibodies are found in 95% of thymoma MG and 50% of late-onset MG (MG onset ≥50 years), are associated with severe disease, and may predict thymoma MG outcome. Nonlimb symptom profile at MG onset with bulbar, ocular, neck, and respiratory symptoms should raise the suspicion about the presence of thymoma in MG. The presence of titin and RyR antibodies in an MG patient younger than 60 years strongly suggests a thymoma, while their absence at any age strongly excludes thymoma. Thymoma should be removed surgically. Prethymectomy plasmapheresis/iv-IgG should be considered before thymectomy. The pharmacological treatment does not differ from nonthymoma MG, except for tacrolimus which is an option in difficult thymoma and nonthymoma MG cases with RyR antibodies. 1. Thymoma in Myasthenia Gravis Thymomas in myasthenia gravis (MG) are neoplasms derived from thymic epithelial cells, and are usually of the cortical subtype (WHO type B) [1]. 50% of thymoma patients develop MG (hereafter referred to as thymoma MG in this paper) [2, 3]. Cortical thymomas usually have some morphological similarities with thymic cortex; they share the capacity to propagate the maturation of immature naive CD4 T cells and export mature naive T cells into the periphery. Thymomas lacking this ability do not induce MG [4]. Thymomas with histological similarities to medullary thymic tissue or thymomas lacking developing T cells are seldom associated with MG [4]. Other thymoma characteristics that can cause reduced self-tolerance include defective epithelial expression of the autoimmune regulator (AIRE) gene and/or of major histocompatibility complex class II molecules, absence of myoid cells, failure to generate FOXP3(+) regulatory T cells, and genetic polymorphisms affecting T-cell signalling [5]. Histologically, thymomas are epithelial neoplastic cells surrounded by maturing T cells. The epithelial cells are capable of expressing epitopes cross-reactive with skeletal muscle proteins, such as acetylcholine receptor (AChR), titin, and ryanodine receptor (RyR) [6, 7]. The muscle-like epitopes are presented to T cells together with costimulatory molecules [7]. Autoreactive T cells specific for AChR and titin are found both in thymomas and in thymoma MG patients’ sera [8]. Thymoma epithelial cells present AChR peptides to T-cell lines in
Arthropod borne diseases in Italy: from a neglected matter to an emerging health problem
Romi,Roberto;
Annali dell'Istituto Superiore di Sanità , 2010, DOI: 10.4415/ANN_10_04_12
Abstract: in medical entomology, "arthropod borne diseases", or "vector borne diseases" (vbd) are intended as a group of human and animal infections caused by different pathogen organisms (protozoa, helminthes, bacteria and viruses) transmitted by the bite of a bloodsucking insect or arachnid. it is commonly known that the infectious diseases transmitted by arthropods are mainly affecting tropical and subtropical countries, nevertheless some of them were or are still common also in the northern hemisphere, where they are usually maintained under control. vbd still represent some of the most important public health problems in the endemic areas but are becoming source of concern for developed countries too. since the last decades of the past century, a number of vbd has been spreading geographically, being recorded for the first time in areas outside their original range. this phenomenon is strictly related to the peculiar epidemiological characteristics of these diseases, that are considered the most susceptible to climatic, environmental and socioeconomic changes. this article is a short overview of the vbd endemic and emerging in italy. the possibility that some exotic vectors and/or pathogens could be introduced and become established in italy is also discussed.
On an extremal problem in two Siegel domains
Romi Shamoyan
Mathematics , 2012,
Abstract: We provide sharp new estimates for distance function in a Siegel domain of first and of second type
Page 1 /269
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.