Dynamical Systems on Hilbert C*-Modules

We investigate the generalized derivations and show that every generalized derivation on a simple Hilbert $C^*$-module either is closable or has a dense range. We also describe dynamical systems on a full Hilbert $C^*$-module ${\mathcal M}$ over a $C^*$-algebra ${\mathcal A}$ as a one-parameter group of unitaries on ${\mathcal M}$ and prove that if $\alpha: \R\to U({\mathcal M})$ is a dynamical system, where $U({\mathcal M})$ denotes the set of all unitary operator on ${\mathcal M}$, then we can correspond a $C^*$-dynamical system $\alpha^{'}$ on ${\mathcal A}$ such that if $\delta$ and $d$ are the infinitesimal generators of $\alpha$ and $\alpha^{'}$ respectively, then $\delta$ is a $d$-derivation.Comment: 7 pages, minor changes, to appear in Bull. Iranian Math. So

Dietary glycemic index and glycemic load in relation to mortality from cardiovascular disease: a review of epidemiologic evidence

زمینه و هدف: در طول دهه‌های گذشته، همواره بیماری‌های قلبی عروقی به عنوان اولین عامل مرگ و میر در سراسر دنیا شناخته شده است. تغییرات نامناسب در الگوی رژیم غذایی، از جمله افزایش مصرف کربوهیدرات‌های تصفیه شده با نمایه گلیسمیک (GI: Glycemic index) و بار گلیسمیک (GL: Glycemic Load) بالا، از مهمترین عوامل خطرزای محیطی در افزایش بیماری‌های قلبی عروقی است. این مطالعه با هدف مروری بر مطالعات پیشین، جهت بررسی ارتباط بین GI و GL رژیم غذایی و مرگ و میر ناشی از انواع بیماری‌های قلبی عروقی انجام شده است. روش بررسی: در این مطالعه مروری با جستجو در PubMed با کلید واژه‌های Glycemic index ، Cardiovascular disease (CVD) و mortality صورت گرفت. تا کنون مطالعات محدودی در این زمینه انجام شده که روش‌ها و نتایج حاصل از این مطالعات در این مقاله مورد بررسی قرار گرفته است. تمام مطالعات انجام شده، از نوع بررسی‌های آینده‌نگر بوده که بر روی انسان انجام شده است. یافته‌ها: نتایج مطالعات حاکی از آن است که ارتباط بین GI و GL رژیم غذایی و مرگ و میر بیماری‌های قلبی عروقی، معنی دار نبوده و تنها در زنان میانسال و مسن ژاپنی، ارتباط مثبت و معنی داری بین GI و GL رژیم غذایی و مرگ و میر ناشی از سکته اسکیمیک (خطر نسبی: 45/2 و فاصله اطمینان 95: 01/1 تا 92/5) مشاهده شده است. نتیجه‌گیری: نتیجه‌گیری بر اساس شواهد و یافته‌های موجود کار دشواری است و تعیین چگونگی ارتباط بین نمایه‌گلیسمیک و بارگلیسمیک رژیم غذایی و مرگ و میر ناشی از انواع بیماریهای قلبی و عروقی، نیازمند مطالعه و تحقیقات بیشتر، در این زمینه است

Unitarily invariant norm inequalities for operators

We present several operator and norm inequalities for Hilbert space operators. In particular, we prove that if $A_{1},A_{2},...,A_{n}\in {\mathbb B}({\mathscr H})$, then $$|||A_{1}A_{2}^{*}+A_{2}A_{3}^{*}+...+A_{n}A_{1}^{*}|||\leq|||\sum_{i=1}^{n}A_{i}A_{i}^{*}|||,$$ for all unitarily invariant norms. We also show that if $A_{1},A_{2},A_{3},A_{4}$ are projections in ${\mathbb B}({\mathscr H})$, then &&|||(\sum_{i=1}^{4}(-1)^{i+1}A_{i})\oplus0\oplus0\oplus0|||&\leq&|||(A_{1}+|A_{3}A_{1}|)\oplus (A_{2}+|A_{4}A_{2}|)\oplus(A_{3}+|A_{1}A_{3}|)\oplus(A_{4}+|A_{2}A_{4}|)||| for any unitarily invariant norm.Comment: 10 pages, Accepted pape

The effect of drought stress and exogenous abscisic acid on growth, protein content and antioxidative enzyme activity in saffron (Crocus sativus L.)

This study was carried out to investigate the effect of drought and abscisic acid (ABA) on growth, protein content and antioxidative enzyme activity in leaves, roots and corms of Crocus sativus L. A comparative study of sample and control showed that leaf relative water content (RWC), length and number of leaves decreased due to drought and ABA when compared to control. Drought and ABA were effective in increasing root length in comparison to control. Though drought and ABA improved the protein content in corms, leaves and roots, maximum protein content was detected in corms. Drought and ABA increased superoxide dismutase (SOD) and peroxidase (POX) activitiy in roots, leaves and corms when compared to that of the control. The highest SOD activity was observed in the roots, followed by leaves and corms, respectively. Furthermore, highest POX activity was observed in roots.Key words: Drought, ABA-treatment, Crocus sativus, peroxidase, superoxide dismutase

Evaluation of medical science staff awareness of factors causing high blood pressure and its complications in Yasouj year 2017

Introduction: Blood pressure is the force per unit area of the blood vessel wall is entered and measured in millimeters of mercury systolic and diastolic pressure, and is therefore expressed. Various risk factors that can be a precursor to hypertension, such as poor nutrition and highcalorie foods and salty, high blood pressure, family history, gender, age, BMI is increasing. Early symptoms include high blood pressure, dizziness, redness of the face, and headache, which, if not treated promptly, can damage the kidneys, eyes, or lead to stroke and stroke and ultimately cause death. The most important factors affecting high blood pressure are age, genetic background and food. In this study, we studied the factors affecting high blood pressure and its complications among staff members of Yasouj University of Medical Sciences

The Solid Phase Extraction of Some Metal Ions Using Palladium Nanoparticles Attached to Silica Gel Chemically Bonded by Silica-Bonded N-Propylmorpholine as New Sorbent prior to Their Determination by Flame Atomic Absorption Spectroscopy

In this research at first palladium nanoparticle attached to a new chemically bonded silica gel has been synthesized and has been characterized with different techniques such as X-ray diffraction (XRD), fourier transform infrared (FT-IR), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). Then, this new sorbent (chemically modified silica gel with N-propylmorpholine (PNP-SBNPM)) was efficiently used for preconcentration of some metal ions in various food samples. The influence of effective variables including mass of sorbent, flow rate, pH of sample solutions and condition of eluent such as volume, type and concentration on the recoveries of understudy metal ions were investigated. Following the optimization of variables, the interfering effects of some foreign ions on the preconcentration and determination of the investigated metal ions described. At optimum values of variables, all investigated metal ions were efficiently recovered with efficiency more than 95%, relative standard deviation (RSD) between 2.4 and 2.8, and detection limit in the range of 1.4–2.7 ng mL−1. The present method is simple and rapidly applicable for the determination of the understudied metal ions (ng mL−1) in different natural food samples

Prevalence of vitamin d deficiency in people aged 18 old referred to Yasuj lab in winter of 2017

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