Photonuclear reactions with Zinc: A case for clinical linacs

The use of bremsstrahlung photons produced by a linac to induce photonuclear reactions is wide spread. However, using a clinical linac to produce the photons is a new concept. We aimed to induce photonuclear reactions on zinc isotopes and measure the subsequent transition energies and half-lives. For this purpose, a bremsstrahlung photon beam of 18 MeV endpoint energy produced by the Philips SLI-25 linac has been used. The subsequent decay has been measured with a well-shielded single HPGe detector. The results obtained for transition energies are in good agreement with the literature data and in many cases surpass these in accuracy. For the half-lives, we are in agreement with the literature data, but do not achieve their precision. The obtained accuracy for the transition energies show what is achievable in an experiment such as ours. We demonstrate the usefulness and benefits of employing clinical linacs for nuclear physics experiments

Gamma rays induced enhancement in the phytonutrient capacities of tomato (Solanum Lycopersicum L.)

One of the most important problems for the field-grown Ayaş tomato (Solanum lycopersicum Ayas population), which is preferred for consumption in Central Anatolia because of its aromatic taste, is that the shelf life is short because of insufficient fruit firmness. Therefore, a study was initiated to develop high-quality lines and variety candidates through mutation breeding in the current Ayaş population. In this study, the effective mutation dose (EMD50) was found to be 150 Gy for seeds using a Cobalt-60 gamma ray source. The main mutant population was generated by applying EMD50. During the study, mutant lines selected by following the classical mutation breeding stages were evaluated in terms of yield and quality traits (antioxidant content, total soluble solid amount, fruit firmness, Brix, etc.) starting from the M4 stage. One of our aims was to determine and improve the phytonutrient content of field-grown tomatoes. The fruits of selected lines at the M4 stage were extracted by liquid-liquid partition and accelerated solvent extraction techniques and analyzed by High Performance Liquid Chromatography (HPLC) in this study. It was found that 28 of the 29 mutant lines were significantly different from the control and mutant lines. Mutant lines 9-22, 8-90, 8-135, and 8-127 were determined to be the most promising for commercialization

Superdeformed and Triaxial States in Ca 42

Shape parameters of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in ^{42}Ca were determined from E2 matrix elements measured in the first low-energy Coulomb excitation experiment performed with AGATA. The picture of two coexisting structures is well reproduced by new state-of-the-art large-scale shell model and beyond-mean-field calculations. Experimental evidence for superdeformation of the band built on 0_{2}^{+} has been obtained and the role of triaxiality in the A∼40 mass region is discussed. Furthermore, the potential of Coulomb excitation as a tool to study superdeformation has been demonstrated for the first time

Quadrupole collectivity in Ca 42 from low-energy Coulomb excitation with AGATA

A Coulomb-excitation experiment to study electromagnetic properties of Ca42 was performed using a 170-MeV calcium beam from the TANDEM XPU facility at INFN Laboratori Nazionali di Legnaro. γ rays from excited states in Ca42 were measured with the AGATA spectrometer. The magnitudes and relative signs of ten E2 matrix elements coupling six low-lying states in Ca42, including the diagonal E2 matrix elements of 21+ and 22+ states, were determined using the least-squares code gosia. The obtained set of reduced E2 matrix elements was analyzed using the quadrupole sum rule method and yielded overall quadrupole deformation for 01,2+ and 21,2+ states, as well as triaxiality for 01,2+ states, establishing the coexistence of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in Ca42. The experimental results were compared with the state-of-the-art large-scale shell-model and beyond-mean-field calculations, which reproduce well the general picture of shape coexistence in Ca42

AB-27 Ülkeleri İçin Gelir Yakınsamasının Mekânsal Ekonometrik Analiz İle Tahmini

Çalışmada 2007-2013 dönemleri arası AB-27 ülkeleri için gelir yakınsamasının mekansal ekonometrik modeller yardımıyla tahmin edilmesi amaçlanmaktadır. Kesit veri analizinde mekan etkisi bulunamamıştır. Panel veri analizinde mekansal ilişki bulunmuştur ve sonuçlar bu ülkeler için yakınsamanın varlığına işaret etmektedir

Lactobacilli-containing vaginal probiotics to cure or prevent bacterial or fungal vaginal dysbiosis: a systematic review and recommendations for future trial designs.

BACKGROUND:Vaginal probiotics claiming to cure and/or prevent bacterial and/or fungal vaginal dysbiosis are available on the market but did, until recently, not have to be approved as drugs for human use. OBJECTIVES:We evaluated the impact of vaginal probiotics on bacterial vaginosis (BV) and vulvovaginal candidiasis (VVC) cure and/or recurrence, as well as vaginal microbiota (VMB) composition and vaginal detection of probiotic strains. SEARCH STRATEGY:We performed a systematic literature search in MEDLINE and Embase up to 15 January 2019. SELECTION CRITERIA:There were no restrictions in probiotic strains/formulations, study populations, and designs. BV had to be diagnosed by Nugent or Ison-Hay Gram stain scoring, VVC by culture, wet mount, or PCR, and VMB composition/detection by molecular techniques. DATA COLLECTION AND ANALYSIS:The authors independently extracted data. MAIN RESULTS:All 22 vaginal probiotics evaluated in the 34 eligible studies contained Lactobacillus strains, and some contained additional active ingredients. The probiotics hold promise for BV cure and prevention, but much less so for VVC cure and prevention. No major safety concerns were reported in any of the studies. Vaginal detection of probiotic strains never lasted long beyond the dosing period, suggesting that they did not colonise the vagina. However, findings are not definitive because heterogeneity was high and the quality of most studies suboptimal. CONCLUSIONS:Availability of vaginal probiotics for vaginal health indications will likely decline in 2020 because of regulatory changes. We urge the field to invest in clinical evidence-based product development, and to conduct future trials more rigorously. This article is protected by copyright. All rights reserved

Zeeman transitions in spherical quantum dot

32nd International Physics Congress of Turkish-Physical-Society (TPS) -- SEP 06-09, 2016 -- Bodrum, TURKEYWOS: 000435205100022In this study, the effects of external magnetic field on the energy states of a spherical quantum dot With infinite potential harrier have been investigated by using Quantum Genetic Algorithm (QGA) and Hartree-Fock Roothaan (HFR) method. Linear Zeeman states and Zeeman transition energies are calculated as a function of dot radius and magnetic field strength. We also carry out the effect of external magnetic field on the ground state binding energy. The results show that the impurity energy states, binding energy and Zeeman transition energies are strongly affected by magnetic field strength and dot radius.Turkish Phys SocResearch Fund of the Aksaray University [2016-048]This work has been supported by Research Fund of the Aksaray University. Project Number: 2016-048

Measurement of radioactivity levels and assessment of radioactivity hazards of soil samples in Karaman, Turkey

WOS:000347733700024PubMed:24587487In this study, the levels of the natural and artificial radioactivity in soil samples collected from surrounding of Karaman in Turkey were measured. Activity concentrations of the concerned radionuclides were determined by gamma-ray spectrometry using a high-purity germanium detector with a relative efficiency of 40% at 1.332 MeV. The results obtained for the U-238 series (Ra-226, Pb-214 and Bi-214), Th-232 series (Ac-228), K-40 and fission product Cs-137 are discussed. To evaluate the radiological hazard of radioactivity in samples, the radium equivalent activity (Ra-eq), the absorbed dose rate (D), the annual effective dose and the external (H-ex) and internal hazard index (H-in) were calculated and presented in comparison with the data collected from different areas in the world and Turkey.Akdeniz University Scientific Research Projects Coordination UnitAkdeniz University; Karamanoglu Mehmetbey University Scientific Research ProjectKaramanoglu Mehmetbey University [23-M-13]This work is supported by Akdeniz University Scientific Research Projects Coordination Unit and Karamanoglu Mehmetbey University Scientific Research Project 23-M-13