Preparation and Characterization of Mixed Ligands Metal Complexes Derived from Acetylacetonyl P-Imino Acetophenone and 5-Nitroso8-Hydroxyquinoline With Fe (II), Co (II), Ni (II) and Cu (II) Ions

The Schiff base ligand (HL) has been prepared by the reaction of Paminoacetophenone with acetylacetone. This ligand reacted with 5-nitroso8- hydroxyquinoline (HQ) and salts of first transition series (M) where M= (Fe(II), Co(II), Ni(II) and Cu(II) ions ) to get mononuclear metal (II) complexes of the type [MLQ(H2O)2] have also been synthesized. The formation of the Schiff base ligand and its complexes have been envisaged from FTIR, UV-VIS, magnetic susceptibility, conductivity and atomic absorption technique studies. These studies confirm an octahedral environment around the metal ion in all our complexes

Synthesis and Characterization of Zinc Oxide and Cerium Dioxide Nanoparticles with Possible Application for Nitrite Ions Removal in Waters

Nitrite ion, a characteristic pollutant, can be removed from water by reverse osmosis, distillation, or ion exchange resin. In this study, we removed it by using ZnO and CeO2 nanoparticles. First, zinc hydroxide and cerium hydroxide were prepared by the hydrothermal method and heated at 90°C to dry. Second, they were annealed at 400°C to produce nanoparticles of ZnO and CeO2, respectively. The obtained samples were characterized by X-ray diffraction to ascertain their structure and chemical composition. The surface morphology analysis of the nanoparticles was performed using scanning electron microscopy. Atomic force microscopy was employed to characterize the imaging surface and ascertain the surface roughness. The functional groups present at the surface of the nanoparticles were investigated using the Fourier transform infrared spectroscopy method. The optical properties of these particles were investigated using the UV-visible spectroscopy. Further, the produced nanoparticles were used to adsorb NO2- ions from aqueous solutions. The results showed that the nanoparticles which were heated at 90°C (hydroxide forms) presented a higher activity for nitrite ions removal than those that were heated at 400°C (oxide forms). This may be related to nitrite ions preferential adsorption to hydroxide forms rather than to oxide forms; in both cases (90°C and 400°C), zinc oxide nanoparticles presented higher nitrite removal activity

Synthesis and Antibacterial Activity of Rutile-TiO2 ‎Nano Powder Prepared by Hydrothermal Process ‎

حضر اوكسيد التيتانيوم النانوي نوع روتايل (r-TiO2) بتقنية الحراره المائيه في الأوتكليف، حصل التفاعل بين رباعي كلوريد التيتانيوم ومزيج متكون من ماء لاايوني وايثانول بنسبة (37:) على التوالي. جفف الناتج ولدن عند 400 °م.  التركيب وطوبوغرافية السطح لاوكسيد التيتانيوم تم تشخيصها بواسطة قياسات حيود الاشعة السينية (XRD) ، المجهر الألكتروني الماسح (SEM), مجهر القوة الذرية (AFM) ومطيافية الأشعة تحت الحمراء (FT-IR) والأشعة فوق البنفسجية/المرئية (UV/Visible). تم دراسة تاثير الاوكسيد المخصر على نوعين من البكتريا الغرامية السالبة (Escherichia coli) والموجبة (Staphylococcus aurous ). بينت الدراسة ان اوكسيد التيتانيوم النانوي نوع الروتايل (r-TiO2) له فعالية مضادة للبكتريا ويمكن استخدامه كمضاد بكتيري لمختلف الاغراضRutile titanium dioxide (r-TiO2) Nano powder has been synthesized by hydrothermal method in autoclave. The reaction took place between titanium tetrachloride (TiCI4) and mixture solution consisted of deionized water and ethanol, in the ratio (3:7) respectively. The product has been dried and annealed at 400°C. The structure, morphology and the particle size of the Nano powder were investigated by X-ray Diffraction, Scanning Electron Microscopy (SEM), Atomic Force Microscope (AFM), FT-IR and UV/visible spectroscopy measurements. The effect of r-TiO2 on gram-negative bacteria Escherichia coli (E. coli) and gram-positive bacteria Staphylococcus aurous (S. aureus) has been studied. This study showed that rutile TiO2 Nano powder has efficient antibacterial activity, and can use as an antibacterial agent for different purpose

Synthesis and Catalase Mimic Activity of MnO2 Nano Powder Prepared by Hydrothermal Process

حضرثنائي اوكسيد المنغنيز النانوي بطريقة الضغط الحراري (الاوتوكليف). وتم تلدين ثنائي اوكسيد المنغنيز عند درجات حرارية مختلفة (250،400،550 و700م˚). اخذت القياسات للمساحيق النانوية ولمتغيرات متعددة ومن ثم شخصت البنية التركيبية وطوغرافية الاسطح بوساطة فحص حيود الاشعة السينيه ((XRD, مجهر القوه الذريه ((AFM و المجهر الاكتروني الماسح ((SEM. درست فعالية ثنائي اوكسيد المنغنيز كعامل مقلد لانزيم الكتليز (الفعالية التحفيزية) ضد بيروكسيد الهيدروجين وباستخدام طريقة جديدة ووجد ان التلدين بدرجة حرارة 400˚م هي الافضل.Manganese dioxide (MnO2) nanopowder has been synthesized by hydrothermal method. MnO2 was annealed at different temperatures (250, 400, 550, 700˚C). The crystal structure and surface morphology of these nanostructures were characterized by X-ray diffraction (XRD), Atomic Force Microscope (AFM) and Scanning Electron Microscopy (SEM). The catalase mimic activity (catalytic activity) of MnO2 against hydrogen peroxide (H2O2) was studied by using the new method and found that 400˚C is the best annealing temperature

Synthesis of Metal Complexes Derived from Salicylidene p-Aminoacetophenone

The Schiff base ligand (HL) has been prepared by the reaction of paminoacetophenone with salicylaldehyde. This ligand was used to prepare complexes of the type [ML2(H2O)2], (where M 2+ = Mn, Fe, Co, Ni and Cu). The resulting product was found to be solid which have been characterized using FTIR and UV-VIS spectroscopy. Elemental analyses have been performed using atomic absorption technique; the magnetic susceptibility and the conductivity have also been measured

Effect of Crosslinking Agent (Zinc Chloride) on the Swelling Ratio and Water Retention Capacity of Polyacrylate and Polyvinyl Alcohol

In this study, using potassium polyacrylate (KPA), polyvinylalcohol (PVA), and zinc chloride as cross-linking agents, successfully synthesized novel superabsorbent polymers. Different weight ratios of KPA and PVA were used to prepare the polymers using polymerization solution. So, polymers with different weight ratios made from PVA and KPA. Superabsorbent polymers (SAPs) were produced using a simple approach at ambient temperature. By comparing absorption peaks, Fourier transform infrared spectroscopy (FTIR) and UV analysis were utilized to investigate the molecular interactions. The morphology of superabsorbent polymers was investigated by scanning electron microscopy (SEM). According to FT-IR, UV, and SEM results, the superabsorbent polymers (Zn-KPA and Zn-PVA) were prepared successfully. A comparison of Zn-KPA and Zn-PVA SAPs was conducted. The effects of cross-linking on water absorption were investigated. The Zn-PVA superabsorbent polymer has a maximum swelling capacity of 407%, while the swelling ratio of the Zn-KPA was 304%. Thus, these prepared superabsorbent polymers could be used for agricultural applications such as water storage. With increasing zinc chloride content and time, superabsorbent polymers’ swelling capacity has considerably improved

تعليم مهارة الكلام في االمدرسة الثانوية في إندونيسيا ونيجيريا

تهدف هذه المدرسة إلى وصف عن أساليب التدريس في المدارس الثانوية في إندونيسيا ونيجيريا. الطريقة المستخدمة في هذه الدراسة هي البحث النوعي الوصفي الميداني. ومجتمع البحث: المدير, ومدرسي اللغة العربية في االمدرسة الثانوية وطلاب المدارس في إندونيسيا ونيجيريا. كانت طرق جمع البيانات المستخدمة هي: الملاحظة, والمقابلات, والوثائق, مع التحليل الفني لبيانات التثليث. تشير نتائج الدراسة إلى أن تعلم مهارة التحدث للمدرسة الثانوية في إندونيسيا يستخدم طريقة السمعية الشفاهية. تبدأ عملية التعلم مع ذكر وقراءة المفردات من قبل المدرس, ثم يشارك الطلاب في النطق ثلاث مرات. يتم تقييم التعلم من خلال تقديم الأسئلة للطلاب حول المفردات التى تم منحها ثم يقوم الطلاب بالإجابة اللفظية. كما يطلب من الطلاب وضع جمل من المفردات التي يعطيها المعلم شفاهيا. إن استخدام هذه الطريقة تشجع إلى نجاح البيئة العربية حيث يتكلم الطلاب اللغة العربية يوميا. وتؤدي إلى وجود تعلم تفاعلي وتواصلي وممتع حتى لا يشعر الطلاب بالملل. وأما تعليم مهارة الكلام في االمدرسة الثانوية بنيجيريا يعتمد اعتمادا كليا على تعويد التلاميذ عل الكلام باللغة العربية وتنمية خبراتهم الكلامية بأشكال متنوعة من الحوار والمناظرة أو المسابقة وغيرها. ويحدث ذلك تحت هيمنة المدرس الذي يلاحظ في كلامهم مواضع النقص والإخفاق, فيقوم بالتصحيح مشفوعا بالبيان والتوضيح والتوجيه المقنع. من بعض وجوه الاتفاق في كثير من الأنظمة التدريسية والمشاكل التي تواجه التلاميذ في تعليم مهارة الكلام مع اهتداء المدرس إلى كيفية تبديد شمل هذه المشكلات مع سعيه الحثيث لإيجاد الحلول الناجع

Preparation and Characterization of Indium Oxide Nanoparticles by Sol-Gel Method and its NO2 Gas Sensing Properties

In this work, In2O3 nanoparticles were prepared by sol-gel method and deposited on quartz substrate by dip coating technique and annealed in air at different temperatures of (450, ,550 and 650) ̊ C at constant time (60 min). X-ray analysis has confirmed the formation of polycrystalline cubic phase that increases in crystaline size with increasing annealing temperature. The optical properties of In2O3 nanostructure thin film were studied. The transmittance was measured in the wavelength range from(300nm to 1100 nm) for all the films.The sensitivity toward NO2 gas has been measured,where In2O3 annealed at different temperatures

Expression of Steroid Receptor RNA Activator 1 (SRA1) in the Adipose Tissue Is Associated with TLRs and IRFs in Diabesity

Steroid receptor RNA activator gene (SRA1) emerges as a player in pathophysiological responses of adipose tissue (AT) in metabolic disorders such as obesity and type 2 diabetes (T2D). We previously showed association of the AT SRA1 expression with inflammatory cytokines/chemokines involved in metabolic derangement. However, the relationship between altered adipose expression of SRA1 and the innate immune Toll-like receptors (TLRs) as players in nutrient sensing and metabolic inflammation as well as their downstream signaling partners, including interferon regulatory factors (IRFs), remains elusive. Herein, we investigated the association of AT SRA1 expression with TLRs, IRFs, and other TLR-downstream signaling mediators in a cohort of 108 individuals, classified based on their body mass index (BMI) as persons with normal-weight (N = 12), overweight (N = 32), and obesity (N = 64), including 55 with and 53 without T2D. The gene expression of SRA1, TLRs-2,3,4,7,8,9,10 and their downstream signaling mediators including IRFs-3,4,5, myeloid differentiation factor 88 (MyD88), interleukin-1 receptor-associated kinase 1 (IRAK1), and nuclear factor-κB (NF-κB) were determined using qRT-PCR and SRA1 protein expression was determined by immunohistochemistry. AT SRA1 transcripts’ expression was significantly correlated with TLRs-3,4,7, MyD88, NF-κB, and IRF5 expression in individuals with T2D, while it associated with TLR9 and TRAF6 expression in all individuals, with/without T2D. SRA1 expression associated with TLR2, IRAK1, and IRF3 expression only in individuals with obesity, regardless of diabetes status. Furthermore, TLR3/TLR7/IRAK1 and TLR3/TLR9 were identified as independent predictors of AT SRA1 expression in individuals with obesity and T2D, respectively. Overall, our data demonstrate a direct association between the AT SRA1 expression and the TLRs together with their downstream signaling partners and IRFs in individuals with obesity and/or T2D

Correlation of Total Cholesterol and Glucose in Serum of Iraqi Patients with Atherosclerosis and Diabetes Mellitus Type 2

Cholesterol is a fatty substance (lipid) classified as a waxy steroid of fat. It is absorbed by the intestine into blood stream and is packaged inside a protein coat a chylomicron. Blood glucose is a simple monosaccharide absorbed directly into the blood stream during digestion. The level of blood glucose normally represents a balance between the inflow of glucose into blood and it is uptake by the tissue. Atherosclerosis is a general term for a number of different medical conditions that affect the heart, this is occurs when the blood supply to a part of heart is interrupted, must commonly due to plaque, is build up in the coronary arteries consist of lipid cholesterol and calcium. It causes a damage of potential disease of heart muscle due to thickening and hardening of arteries. Diabetes mellitus is a disorder in which the level of blood glucose is persistently elevated above the normal range due to decrease secretion of insulin. The main objective of this study is to determine the concentrations of total cholesterol and glucose into blood serum of Iraq patients with atherosclerosis and diabetes mellitus type 2. This study included 60 specimens of patients with atherosclerosis and 60 patients with type 2 diabetes mellitus; their age range was 45-65 years. These patients were then matched by age and sex to 30 healthy individuals. Results revealed that there was highly significantly increased in the mean value of total cholesterol and glucose concentrations in patients of atherosclerosis (p<0.001) and diabetes mellitus (p<0.001) as compared with healthy individuals