UTICAJ HRANIVA I TERMINA SADNJE NA PROIZVODNE OSOBINE JAGODE (Fragaria ananassa Duch.)

The paper presents the results of the influence of terms of planting and fertilizers on the production characteristics of strawberries. Planting dates are the beginning of July and the beginning of October. The feeding programs included the use of Rosasol fertilizers (Orange Rosasol formulation 15-30-20, Blue Rosasol formulation 20-20-20 and Yellow Rosasol formulation 17-09-29) and the use of Soluveg fertilizers (Green 10-40-10 + 4MgO and Parma 16-6-27 + 3MgO + ME). The results showed that the earlier planting date influenced earlier fruiting, but also better production results (higher yield, larger fruits). In terms of fertilizers, better results have been achieved with Rosasol.Publishe

Community SARS-CoV-2 seroprevalence before and after the second wave of SARS-CoV-2 infection in Harare, Zimbabwe.

BACKGROUND: By the end of July 2021 Zimbabwe, has reported over 100,000 SARS-CoV-2 infections. The true number of SARS-CoV-2 infections is likely to be much higher. We conducted a seroprevalence survey to estimate the prevalence of past SARS-CoV-2 in three high-density communities in Harare, Zimbabwe before and after the second wave of SARS-CoV-2. METHODS: Between November 2020 and April 2021 we conducted a cross-sectional study of randomly selected households in three high-density communities (Budiriro, Highfield and Mbare) in Harare. Consenting participants answered a questionnaire and a dried blood spot sample was taken. Samples were tested for anti-SARS-CoV-2 nucleocapsid antibodies using the Roche e801 platform. FINDINGS: A total of 2340 individuals participated in the study. SARS-CoV-2 antibody results were available for 70·1% (620/885) and 73·1% (1530/2093) of eligible participants in 2020 and 2021. The median age was 22 (IQR 10-37) years and 978 (45·5%) were men. SARS-CoV-2 seroprevalence was 19·0% (95% CI 15·1-23·5%) in 2020 and 53·0% (95% CI 49·6-56·4) in 2021. The prevalence ratio was 2·47 (95% CI 1·94-3·15) comparing 2020 with 2021 after adjusting for age, sex, and community. Almost half of all participants who tested positive reported no symptoms in the preceding six months. INTERPRETATION: Following the second wave, one in two people had been infected with SARS-CoV-2 suggesting high levels of community transmission. Our results suggest that 184,800 (172,900-196,700) SARS-CoV-2 infections occurred in these three communities alone, greatly exceeding the reported number of cases for the whole city. Further seroprevalence surveys are needed to understand transmission during the current third wave despite high prevalence of past infections. FUNDING: GCRF, Government of Canada, Wellcome Trust, Bavarian State Ministry of Sciences, Research, and the Arts

New Records of the Savi's Pipistrelle Hypsugo savii (Bonaparte, 1837) (Chiroptera, Mammalia) from Serbia: An Evidence for the Expansion of its Geographical Range

This paper presents the currently known records (84) of Hypsugo savii from Serbia. They were collected from 22 localities and 55 exact sites. Only three of these records were previously published. The first records were from 1981 from two localities in Eastern Serbia. Since then, new sites have been gradually recorded throughout Serbia, particularly in the last four years. According to the records, there is a noticeable expansion of the species' range, from mountainous karstic areas to valleys and plains, with human settlements being particularly favoured habitats. After the first appearance in 1994 in human settlements, a constant increase of population was recorded from these habitats. Furthermore, there was growing evidence of reproduction in settlements and lowland habitats. A significant part of summer records was from certain areas of Vojvodina Province, i.e. southern part of the Pannonian Plain, recorded often above vast arable fields. The expansion of the range and the increase of population numbers had been recorded in neighbouring countries; thus, the described situation in Serbia is a contribution to better understanding of the present distribution, bionomics and ecology of this species.Ministry of Education, Science and Technological Development of Serbia {[}173003

New Records of the Savi's Pipistrelle Hypsugo savii (Bonaparte, 1837) (Chiroptera, Mammalia) from Serbia: An Evidence for the Expansion of its Geographical Range

This paper presents the currently known records (84) of Hypsugo savii from Serbia. They were collected from 22 localities and 55 exact sites. Only three of these records were previously published. The first records were from 1981 from two localities in Eastern Serbia. Since then, new sites have been gradually recorded throughout Serbia, particularly in the last four years. According to the records, there is a noticeable expansion of the species' range, from mountainous karstic areas to valleys and plains, with human settlements being particularly favoured habitats. After the first appearance in 1994 in human settlements, a constant increase of population was recorded from these habitats. Furthermore, there was growing evidence of reproduction in settlements and lowland habitats. A significant part of summer records was from certain areas of Vojvodina Province, i.e. southern part of the Pannonian Plain, recorded often above vast arable fields. The expansion of the range and the increase of population numbers had been recorded in neighbouring countries; thus, the described situation in Serbia is a contribution to better understanding of the present distribution, bionomics and ecology of this species.Ministry of Education, Science and Technological Development of Serbia {[}173003

Cranial variation of the greater horseshoe bat Rhinolophus ferrumequinum (Chiroptera: Rhinolophidae) from the central Balkans

Cranial size and shape variation of the greater horseshoe bat Rhinolophus ferrumequinum from territories in Serbia and Montenegro was examined using geometric morphometric methods. Statistically significant size and shape differences among specimens from distinct geographic regions (the Carpatho-Balkanides, the Internal and External Dinarides) were observed. Bats from the Carpatho-Balkanides have the smallest crania, while those from the External Dinarides have the largest ones. Compared to specimens from the Carpatho-Balkanides, bats from the other two regions have crania wider in the temporal and elongated in the facial region, while the basicranial region is smaller. Our analysis of sexual size dimorphism revealed no statistically significant differences between males and females. Even though significant sexual shape dimorphism was observed, cranial shape differences among bats from different geographic regions exceeded those between sexes. We also found that size and shape vary with climatic factors. Allometry has statistically significant effect on cranial shape variation and somehow contributes to covariation between cranial shape and environmental variables. Although the examined bats were from a relatively small territory, we have provided new insights into important issues like geographic variation, sexual dimorphism and allometry in this species. (C) 2014 Elsevier GmbH. All rights reserved.Ministry of Education, Science and Technological Development of Serbia {[}173003

Comprehensive studies of structural, electronic and magnetic properties of Zn0.95Co0.05O\mathrm{Zn_{0.95}Co_{0.05}O} nanopowders

X-ray absorption (XANES, EXAFS, XMCD) and photoelectron (XPS) spectroscopic techniques were employed to study local structural, electronic and magnetic properties of Zn$_{0.95}$Co$_{0.05}$O nanopowders. The substitutional Co$^{2+}$ ions are incorporated in ZnO lattice at regular Zn sites and the sample is characterized by high structural order. There was no sign of ferromagnetic ordering of Co magnetic moments and the sample is in paramagnetic state at all temperatures down to 5 K. The possible connection of the structural defects with the absence of ferromagnetism is discussed on the basis of theoretical calculations of the O K-edge absorption spectra

How the Duration Period of Erythropoietin Treatment Influences the Oxidative Status of Hemodialysis Patients

Background: End-stage renal disease is a state of enhanced oxidative stress (OS) and hemodialysis (HD) and renal anemia further augment this disbalance. Anemia correction with erythropoietin (EPO) may improve oxidative status. However, there is no evidence of time dependent effects of EPO therapy on redox status of HD patients.Objective: The aim of this study was to evaluate whether the duration of EPO treatment may affect OS parameters in uremic patients.Patients and methods: 104 HD patients and 29 healthy volunteers were included. Patients were divided into 3 groups according to the duration of EPO treatment. Forth group consisted of HD patients without EPO treatment. Plasma and erythrocyte malondialdehyde (MDA, MDArbc), reactive carbonyl groups (RCG), plasma sulfhydryl (-SH) groups and total antioxidative capacity (TAC) levels were evaluated.Results: HD patients both with and without EPO treatment, showed a significant increase in all oxidative parameters without significance between EPO treated and -untreated group. The decrease in MDA and MDArbc levels coincided with the duration of EPO treatment. A negative correlation was observed between the duration of EPO treatment and serum MDA (r=&#727;0.309, p=0.003). Increasing periods of EPO treatment were associated with decrease in RCG, without significance between EPO groups. Increase in TAC accompanied increasing durations of EPO treatment, with EPO treatment for more than 24 months causing the most striking changes (p&#60;0.05). There were no significant differences in &#727;SH levels between EPO subgroups.Conclusion: Our results suggest that long term administration of EPO attenuated the lipid peroxidation process and restored the levels of antioxidants.</p

Agro-morphological characterisation and evaluation of a Serbian vineyard peach [Prunus persica (L.) Batsch] germplasm collection

Seventy-five vineyard peach [Priam persica (LJ Batsch] accessions, obtained by seed propagation and originating from different regions of Serbia, were characterized using a set of 39 agro-morphological traits. The evaluation was carried out over a 3-year period in a vineyard peach collection situated at the Radmilovac Experimental Station, owned by the Faculty of Agriculture, Belgrade University. To investigate diversity, descriptive statistics and multivariate analyses were used. Most studied traits showed high variability. The variability of descriptive traits was highly pronounced for fruit ground and flesh colour; regarding metric traits, the highest variation was recorded for trunk circumference, petal width, flower density, fruit set, fruit weight, sweetness index, fruit taste and fruit flavour. According to PCA, traits with high discriminating power were those related to flower type, colour and size, fruit size and presence of over colour, tree height, ripening time and fruit taste. The cluster analysis grouped accessions into three main clusters and a few sub-clusters. Agronomically important traits allowed a clear separation between the clusters, while morphological traits had almost no impact on this. This study provided information that is important for assessing the biodiversity of vineyard peach accessions, to develop guidelines useful for the description, classification and conservation of valuable local germplasm. Moreover, the phenotypic variability in the vineyard peach collection was found to be very high, suggesting there is extensive genetic diversity available for peach cultivar and rootstock breeding programs