Water-Food-Energy Nexus in the Nile River Basin

This is the final version of the poster. Available from the Dresden Nexus Conference via the link in this recordThe Nile - a transboundary river • 11 riparian countries and home for about 250 million people • Rapid population, economic and urbanization growth are projected • Basin-wide planned development can result in regional cooperation or trigger conflicts • The nexus approach is relevant for addressing broader interdependency and managing interlinked resources in a holistic manne

Proizvodnja i kvalitet mleka i mesa goveda i ovaca u uslovima održive proizvodnje

Basic principles that inform organic livestock production are reviewed in this paper, with special emphasis on milk and meat production in cattle and sheep. Research findings to date are presented on the impact of various management practices, both organic and conventional, as they effect product yield and quality. The importance of incorporating autochnochous breeds into organic milk and meat production systems is particularly emphasized. Additionally, a global overview of organic milk and meat production is given, along with an assessment of opportunities for implementing organic production systems in Serbia.U radu su prikazani osnovni principi organske proizvodnje u stočarstvu. Posebna pažnja posvećena je proizvodnji mleka i mesa goveda i ovaca. Prikazani su dosadašnji rezultati ispitivanja uticaja različitih uslova gajenja u organskoj i konvencionalnoj proizvodnji na prinos i kvalitet proizvoda. Istaknut je značaj korišćenja autohnonih rasa u organskoj proizvodnji mleka i mesa. Dat je prikaz organske proizvodnje mleka i mesa u svetu, kao i mogućnosti organizovanja organske proizvodnje u našoj zemlji

Predicting phase transition pressure in solids: a semiclassical possibility

This is a short review of the physical ideas,algorithm for calculations and some results of a semiclassical theory of the behaviour of materials under high pressure,proposed by P.Savic and R.Kasanin.The theory has found applications from DAC experiments to studies of planetary interior structure.Comment: PDF file,no figure

Učinak kratkotalasnog zračenja na sočivo oka u pacova

The paper deals with the results of a study performed in three groups of rats exposed to microwave <radiation. Eighteen rats were irradiated locally (the right eye), 16 were totally irradiated and 22 served as controls. The activities of enzymes aldolase, lactate dehydrogenase (LDH) and sorbital dehydrogenase (SDH) in rats\u27 lenses were examined. In exposed rats the aldolase and LDH activities were found to be lower and that of SDH higher than in control animals.Autori opisuju rezultate istraživanja učinaka mikrotalasnog zračenja na sočivo oka pacova. Dvije grupe od po 10 ženskih pacova zračili su kratkotalasnim zrakama od 12,2 cm, 2 450 MHz, i to jednu grupu samo desno oko (maksimalna snaga 24 W), a drugu celo telo (maksimalna snaga 200 W). Treća je grupa služila kao kontrola. Životinje su bile eksponirane 15 minuta dnevno, pet puta nedeljno tokom 12 nedelja (prva grupa), odnosno 8 nedelja (druga grupa). Tokom eksperimenta sve su životinje oftalmološki pregledavane i merena im je temperatura tela i oka. Nakon završetka eksperimenta oči su enukleirane, sočivo odvojeno i homogenizirano te je u homogenatu merena aktivnost aldolaze, laktat dehidrogenaze i sorbitol dehidrogenaze. Nisu utvrđene oftalmološke promene na oku. U ozračenih pacova utvrđeno je sniženje aktivnosti aldolaze i sorbitol dehidrogenaze, a aktivnost laktat dehidrogenaze bila je povišena, posebno izrazito u lokalno zračenih pacova

Magnetic field dependence of the oxygen isotope effect on the magnetic penetration depth in hole-doped cuprate superconductors

The magnetic field dependence of the oxygen-isotope (^{16}O/^{18}O) effect (OIE) on the in-plane magnetic field penetration depth \lambda_{ab} was studied in the hole-doped high-temperature cuprate superconductors YBa_2Cu_4O_8, Y_0.8Pr_0.2Ba_2Cu_3O_7-\delta, and Y_0.7Pr_0.3Ba_2Cu_3O_7-\delta. It was found that \lambda_ab for the ^{16}O substituted samples increases stronger with increasing magnetic field than for the ^{18}O ones. The OIE on \lambda_ab decreases by more than a factor of two with increasing magnetic field from \mu_0H=0.2 T to \mu_0H=0.6 T. This effect can be explained by the isotope dependence of the in-plane charge carrier mass m^\ast_{ab}.Comment: 4 pages, two figure

Photoacoustic properties of single crystal PbTe(Ni)

Single crystals of PbTe(Ni) were investigated by the photoacoustic method. They were produced using the Bridgeman method. These crystals have a sodium chloride cubic lattice and could be cleaved paralel to the plane orientation (200). They were of the n-type. Phase and amplitude photoacoustic spectra were measured using a transmision detection configuration set-up. Photoacoustic (PA) spectra (single and normalized) were numerically analyzed using the Rosencwaig-Gersho model. Thermal diffusivity and some electron-transport parameters were determined. These results were compared with existing results for pure single crystal PbTe. Thermal difusivity of PbTe(Ni) is a bit higher than the thermal difusivity of pure PbTe. This is the consequence of a decreasing concentration of the majority free carriers in the doped alloy

PEG-ylated parenteral Nanoemulsions as prospective Carriers for enhanced Brain Delivery with Diazepam as a Model Drug - Physicochemical Characterisation

Parenteral nanoemulsions are regarded as biocompatible drug delivery systems for lypophilic drugs. When it comes to delivering actives to the brain as a target site, prolonged circulation time is desirable. The objective of this study was to conduct physicochemical characterization of PEGylated nanoemulsions as prospective carriers for enhanced brain delivery, using diazepam as a model active substance for brain targeting. Nanoemulsions were prepared by high pressure homogenization method and characterized regarding droplet size, zeta potential, pH, conductivity, viscosity and in vitro release profile. PEG2000-DSPE and PEG5000-DPPE were used for PEGylation. All the formulations were autoclaved and stored at room temperature. After 2 months there were no significant changes in physicochemical parameters in autoclaved formulations which rendered them as good potential templates to incorporate drugs for brain targeted delivery

Muon-Spin-Rotation Measurements of the Penetration Depth in the Infinite-Layer Electron-Doped Cuprate Superconductor Sr0.9La0.1CuO2

Muon spin rotation (mSR) measurements of the in-plane penetration depth lambda_ab have been performed in the electron-doped infinite layer high-Tc superconductor (HTS) Sr0.9La0.1CuO2. Absence of the magnetic rare-earth ions in this compound allowed to measure for the first time the absolute value of lambda_ab(0) in electron-doped HTS using mSR. We found lambda_ab(0)=116(2) nm. The zero-temperature depolarization rate sigma(0)?1/lambda_ab(0)^2=4.6(1) MHz is more than four times higher than expected from the Uemura line. Therefore this electron-doped HTS does not follow the Uemura relation found for hole-doped HTS.Comment: to be published in Physical Review Letter