1,901 research outputs found

    Therapeutic potential of essential oil of Melaleuca quinquenervia (Myrtaceae) in a rat model of ethanol-induced peptic ulcer

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    Purpose: To evaluate the effects of M. quinquenervia extract on ethanol-induced peptic ulcer in rats. Methods: The following three groups of (n = 6) Sprague Dawley rats were included in this study: vehicle (C), ethanol-administered (E) and ethanol + M. quinquenervia-treated (MQ). MQ group rats received 100 ÎŒg/mL M. quinquenervia essential oil just before 96 % ethanol induction (1 ml/kg). One hour after ulcer induction, the animals were euthanized, and gastric and duodenal tissues were removed. Tissue samples were analysed for myeloperoxidase (MPO) activity, malondialdehyde (MDA), glutathione (GSH), myeloperoxidase (MPO) activity, malondialdehyde (MDA) and glutathione (GSH) levels, and histopathological examinations were performed by light microscopy. Results: Gastric and duodenal GSH levels that decreased in the ethanol-administered ulcer groups (p < 0.001), rose following MQ treatment (p < 0.5). Moreover, elevated MPO and MDA levels (p < 0.5) in gastric tissues decreased after MQ-treatment. Similarly, the MQ-treated group showed recovery and control-like morphology compared to the ethanol group in both gastric and duodenal tissues when examined by microscopy. Conclusion: The results indicate that M. quinquenervia extract has a positive impact on gastric injury in rats due to its antioxidant activity. Thus, the plant has a potential for the clinical management of gastric ulcer

    Anti-tyrosinase, anti-elastase, and antioxidant activities of some symmetric bisthiocarbohydrazone compounds

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    Symmetric bisthiocarbohydrazone compounds (1, 2, 3) were obtained by the condensation of thiocarbohydrazide with carbonyl compounds such as isatin (a heterocyclic ketone) and two hydroxyl aldehydes (2-hydroxybenzaldehyde, 2-hydroxy-1-naphthaldehyde) respectively, according to the previously reported methods. These synthesized compounds were evaluated in terms of their anti-tyrosinase, anti-elastase and antioxidant potentials in vitro. All of the tested compounds exhibited anti-tyrosinase and anti-elastase activities. It was observed that the inhibition increased with the increase of bisthiocarbohydrazone concentrations. Compound 1 showed the highest anti-tyrosinase activity. The anti-tyrosinase activity is decreasing in the following order; 2<3<1. Compound 1 showed also the highest anti-elastase activity. The anti-elastase activity is decreasing as 3<2<1. As a result, the most effective compound in terms of anti-tyrosinase and anti-elastase activities is bisthiocarbohydrazone derived from isatin. Compounds 2 and 3 with the hydroxyl substitution showed antioxidant activity close to Trolox. These compounds were found to have significant reducing effects and to be effective scavengers of DPPH

    Patterns of multiple primaries in fortyfour cancer patients: a single-center clinical experience

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    Introduction. Multiple primaries are defined as the existence of more than one synchronous or metachronous cancer type in the same individual. Due to a longer follow-up time after a primary cancer diagnosis, the likelihood of detection of a second primary is also increased. We report on patterns of multiple primaries in a cohort of cancer patients from a single institution.  Material and methods. We identified 44 patients with multiple primaries that were diagnosed, treated, and followed up between March 2011 and January 2022 from our prospectively maintained database at the Hatay Education and Research Hospital Cancer Unit.  Results. The median follow-up time was 60 months (range; 3–103). The median time between the diagnosis of the first primary and the second primary was 29 months (range; 0–94). The median OS was 76 months (95% Cl 26.6–125.4) from the first diagnosis and 27 months (95% Cl 0.65–53.4) from the diagnosis of the second primary for the entire cohort. The first diagnosed tumor was localized in the gastrointestinal system in 43.2% of patients and 65.9% of all tumors were adenocarcinoma. The first diagnosed cancer was at an early stage (Stages I and II) in 63.6% of patients. At the staging evaluation of the second primary, 54.5% of patients were found to be in the early stage (Stages I and II) and 45.5% were found to be in the late stage (Stages III and IV).  Conclusions. Our study is important as this is the largest cohort study about practical implications of managing multiple primaries. The risk of second and further primaries should be kept in mind in the active follow-up Introduction and surveillance of cancer patients

    Design, Performance, and Calibration of the CMS Hadron-Outer Calorimeter

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    The CMS hadron calorimeter is a sampling calorimeter with brass absorber and plastic scintillator tiles with wavelength shifting fibres for carrying the light to the readout device. The barrel hadron calorimeter is complemented with an outer calorimeter to ensure high energy shower containment in the calorimeter. Fabrication, testing and calibration of the outer hadron calorimeter are carried out keeping in mind its importance in the energy measurement of jets in view of linearity and resolution. It will provide a net improvement in missing \et measurements at LHC energies. The outer hadron calorimeter will also be used for the muon trigger in coincidence with other muon chambers in CMS

    Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

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    Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð„with constraintsð ð ð„ „ ðandðŽð„ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis

    Differential cross section measurements for the production of a W boson in association with jets in proton–proton collisions at √s = 7 TeV