876 research outputs found

    Flood Modeling on Koya Catchment Area Using Hyfran, Web Map Service, and HEC-RAS Software

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    In this research, The boundaries of the Koya catchment area have been delineated, and valley paths in the region were drawn by using the Water Modeling System (WMS) software, Analysis of the morphometric information indicated that the morphometric characteristics of watersheds contribute to the floods. The average surface runoff depth depends on the curve number values that are determined based on the types of soil cover and soil class according to Harmonized World Soil Database HWSD software that indicates the soil class in the study area are Group B silt loam,  The results obtained also show that the potential for surface runoff varies with land use and soil characteristics. Also, the value of the curve number (CN) was determined to be 71. The hydrological modeling was performed by the HEC-HMS program that simulates the process of rainfall to runoff using the SCS curve number model. A flood hydrograph was constructed at the catchment area outlet and the floodplain delineation was verified by the HEC-RAS software. The results indicated that the 100-year return period flood could Reach critical areas such as the urban area, agricultural area, residential areas. the results of this study indicate that there are suitable sites in the catchment areas for constructing small dams and ponds for water harvesting.&nbsp

    LOADING OF CLARITHROMYCIN AND PACLITAXEL ON SYNTHESIZED CdS/NiO NANOPARTICLES AS PROMISING NANOCARRIERS

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    Objective: In this study cadmium sulfide (CdS) and nickel oxide (NiO) nanoparticles were synthesized and applied as novel nanocarriers for antibacterial drug clarithromycin (CLA) and anticancer drug paclitaxel (PTX) to improve their physical properties and biological activities.Methods: Cadmium sulfide (CdS) and nickel oxide (NiO) nanoparticles were synthesized by chemical co-precipitation and thermochemical processing techniques respectively and loaded with clarithromycin (CLA) and paclitaxel (PTX) by simple new one-step reaction. Analytical measures including FTIR, PXRD, SEM, AFM, TGA, DSC and zeta potential where used for characterization. The in vitro release, antibacterial as well as anticancer activities were evaluated.Results: Analytical measures revealed that the loading involved physical complex formation rather than chemical modification with the high percent surface loading of the drugs on the nanoparticles. Solubility/dissolution study revealed higher significant* improvement in the solubility of CLA from NiO nanoparticles than that from CdS nanoparticles while the antibacterial activity of CLA was non-significantly improved. For PTX loaded on CdS and NiO nanoparticles showed non-significant change in its solubility, but remarkable significant* increase in its antitumor activity on MCF-7 cell line accompanied with significant* reduction in its cytotoxicity on normal mammary cell line (MCF-10A) indicating the selectivity and targeting of PTX-CdS/NiO nanocarriers with reduced side effects of the drug and the used metal nanocarriers.Conclusion: This work provided most selective and safe delivery system for PTX and best method for enhancement of CLA solubility.Keywords: Clarithromycin (CLA), Paclitaxel (PTX), Cadmium sulfide (CdS) nanoparticles, Nickel oxide (NiO) nanoparticlesÂ

    Naturally occurring mutations in the PA gene are key contributors to increased virulence of pandemic H1N1/09 influenza virus in mice

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    We examined the molecular basis of virulence of pandemic H1N1/09 influenza viruses by reverse genetics based on two H1N1/09 virus isolates (A/California/04/2009 [CA04] and A/swine/Shandong/731/2009 [SD731]) with contrasting pathogenicities in mice. We found that four amino acid mutations (P224S in the PA protein [PA-P224S], PB2-T588I, NA-V106I, and NS1-I123V) contributed to the lethal phenotype of SD731. In particular, the PA-P224S mutation when combined with PA-A70V in CA04 drastically reduced the virus's 50% mouse lethal dose (LD50), by almost 1,000-fold

    A Multimodality Hybrid Gamma-Optical Camera for Intraoperative Imaging

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    The development of low profile gamma-ray detectors has encouraged the production of small field of view (SFOV) hand-held imaging devices for use at the patient bedside and in operating theatres. Early development of these SFOV cameras was focussed on a single modality-gamma ray imaging. Recently, a hybrid system-gamma plus optical imaging-has been developed. This combination of optical and gamma cameras enables high spatial resolution multi-modal imaging, giving a superimposed scintigraphic and optical image. Hybrid imaging offers new possibilities for assisting clinicians and surgeons in localising the site of uptake in procedures such as sentinel node detection. The hybrid camera concept can be extended to a multimodal detector design which can offer stereoscopic images, depth estimation of gamma-emitting sources, and simultaneous gamma and fluorescence imaging. Recent improvements to the hybrid camera have been used to produce dual-modality images in both laboratory simulations and in the clinic. Hybrid imaging of a patient who underwent thyroid scintigraphy is reported. In addition, we present data which shows that the hybrid camera concept can be extended to estimate the position and depth of radionuclide distribution within an object and also report the first combined gamma and Near-Infrared (NIR) fluorescence images.Peer-reviewedPublisher Versio

    Imaging fetal anatomy.

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    Due to advancements in ultrasound techniques, the focus of antenatal ultrasound screening is moving towards the first trimester of pregnancy. The early first trimester however remains in part, a 'black box', due to the size of the developing embryo and the limitations of contemporary scanning techniques. Therefore there is a need for images of early anatomical developmental to improve our understanding of this area. By using new imaging techniques, we can not only obtain better images to further our knowledge of early embryonic development, but clear images of embryonic and fetal development can also be used in training for e.g. sonographers and fetal surgeons, or to educate parents expecting a child with a fetal anomaly. The aim of this review is to provide an overview of the past, present and future techniques used to capture images of the developing human embryo and fetus and provide the reader newest insights in upcoming and promising imaging techniques. The reader is taken from the earliest drawings of da Vinci, along the advancements in the fields of in utero ultrasound and MR imaging techniques towards high-resolution ex utero imaging using Micro-CT and ultra-high field MRI. Finally, a future perspective is given about the use of artificial intelligence in ultrasound and new potential imaging techniques such as synchrotron radiation-based CT to increase our knowledge regarding human development

    Shedding New Light on Kaon-Nucleon/Nuclei Interaction and Its Astrophysical Implications with the AMADEUS Experiment at DAFNE

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    The AMADEUS experiment deals with the investigation of the low-energy kaon-nuclei hadronic interaction at the DA{\Phi}NE collider at LNF-INFN, which is fundamental to respond longstanding questions in the non-perturbative QCD strangeness sector. The antikaon-nucleon potential is investigated searching for signals from possible bound kaonic clusters, which would open the possibility for the formation of cold dense baryonic matter. The confirmation of this scenario may imply a fundamental role of strangeness in astrophysics. AMADEUS step 0 consisted in the reanalysis of 2004/2005 KLOE dataset, exploiting K- absorptions in H, 4He, 9Be and 12C in the setup materials. In this paper, together with a review on the multi-nucleon K- absorption and the particle identification procedure, the first results on the {\Sigma}0-p channel will be presented including a statistical analysis on the possible accomodation of a deeply bound stateComment: 6 pages, 2 figure, 1 table, HADRON 2015 conferenc
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