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Article
Kinetic Study on Vanadium Recovery From Oil Fired Power Stations
دراسة حركية التفاعلات لاسترداد الفناديوم من مخلفات حرق الوقود في محطات الطاقة الكهربائية

Authors: Jabber Shanshool جابر شنشول جمالي --- Khalid M. Mousa خالد مخلف موسى --- Rana K. Obaid رنا خالد عبيد
Journal: AL-NAHRAIN JOURNAL FOR ENGINEERING SCIENCES مجلة النهرين للعلوم الهندسية ISSN: 25219154 / eISSN 25219162 Year: 2009 Volume: 12 Issue: 2 Pages: 151-160
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

In this work it has been attempted to study the kinetic of vanadium recovery from fly ash by leaching with NaOH solution from previous work of Mosa (1999). The selected data were chosen at particle size of scale between 125 to 200 µm, temperature 343 to 373 K, reaction (leaching) time up to 8 hours and at about fixed NaOH solution molarity (3 to 4 M).The results show that vanadium recovery increased with time and temperature and mostly decreased with particle size.A second order polynomial mathematical correlation was employed to describe vanadium recovery response. The correlation coefficient of the obtained correlation was 0.9990 and variance of 0.9981 with confidence levels of 95 %.Kinetic study shows that the chemical reaction is the controlling step which has the highest resistance among other steps. A chemical reaction order was found equals to -3 with activation energy of 1080 J/ mole and frequency factor of about 2.6884.

اهتم هذا البحث بدراسة حركية استعادة الفناديوم من مخلفات حرق الوقود في محطات الطاقة الكهربائية بعملية الاستخلاص بواسطة هيدروكسيد الصوديوم من نتائج البحث السابق لموسى (1999). البيانات المحددة تم اختيارها عند حجم حبيبي يتراوح من 125 إلى 200 مايكرو متر ودرجة حرارة من 343-373 كلفن و وقت زمن الهظم من 1- 8 ساعات وتركيز مولاري ثابت تراوح من 3-4 مولاري . تشير النتائج إلى أن نسبة استعادة الفناديوم تزداد بزيادة درجة الحرارة وزمن الهضم ونقصان الحجم الحبيبي . استخدمت معادلة رياضية من الدرجة الثانية لوصف استجابة استعادة الفناديوم و وجد إن معامل الارتباط كان 0.9990 والتباين 0.9981 لمستوى ثقة 95 %.دراسة الحركية أظهرت إن الخطوة المسيطرة على العملية هي التفاعل الكيمياوى والتي تمتلك اكبر مقاومة من بين باقي الخطوات. كانت درجة حركية التفاعل هي -3 و طاقة تنشيط 1080 جول لكل مول وعامل تردد 2.6884.


Article
Identification And Diagnosis Of Cutaneous Leishmaninsis By Polymerase Chain Reaction Assay (Pcr) In Najaf Alashraf Province
تحدید وتشخیص اللشمانیا الجلدیة باستخدام تفاعل سلسلة انزیم البلمرة في محافظة النجف الأشرف

Authors: Haitham Mohammed Alawadi --- Ban Shakir Alshukur
Journal: kufa Journal for Nursing sciences مجلة الكوفة لعلوم التمريض ISSN: 22234055 Year: 2013 Volume: 3 Issue: 2 Pages: 1-6
Publisher: University of Kufa جامعة الكوفة

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Abstract

Objective: The present study aimed to determine the effectiveness of a polymerase chain reaction (PCR)technique for identification and differentiation of the cutaneous leishmaniasis parasite in clinical samplecollected from lesion exudates patients.Methodology: The (115) sample were examined by smear slid preparation culture on RPMI 1640 and NNNthen DNA isolation. The DNA of the promastigote were amplified by PCR including primers selected onrepetitive KDNA for identification of leishmania species.The data was analyzed by using frequency andpercentage.Results: The PCR result showed that two species of leishmania (L. major with 620 bp and L. tropica with 800bp) exist.Conclusion: It is concluded from the present study that the PCR technique has high specificity and sensitivityduring the differentiation between Cutaneous Leishmanial species in comparing with conventional methods.Recommendation: The PCR technique can be use it to diagnosis and differentiation between different type ofCutaneous Leishmaniasis.

في الكشف والتفریق بین أنواع طفیلیات PCR الھدف: تھدف الدراسة الحالیة إلى تحدید فعالیة استخدام تقنیة سلسلة تفاعل الإنزیم المتبلمراللشمانیا الجلدیة في العینات السریریة المأخوذة من المصابین بطفیلي اللشمانیا الجلدیة .المنھجیة: تم فحص العینات المأخوذة من ( 115 ) مریض مصابین بالآفة الجلدیة باستخدام المسحة الزجاجیة والزرع ألمختبري على الوسطوأستخدم الوسائل الاحصائیة من نسبة مئویة وتكرار . (RPMI والتكثیر على الوسط الزرعي( 1640 (NNN) ألزرعيفي الطور أمامي السوط من العینات المأخوذة من الأوساط الزرعیة بأستخدام بادئات خاصة للجین المشفر ال DNA النتائج: تم تضخیم اللطفیلي اللشمانیا . أظھرت الدراسة بأن ھناك نوعین لطفیلي اللشمانیا الجلدیة احدھما (Kinetoplast kDNA ) للبائنة الحركیة المسمى DNAووزنھا الجزیئي ( 800 ) زوجا قاعدیا في العینات المجمعة من (L. tropica) ووزنھا الجزیئي ( 620 ) زوجاً قاعدیا والأخرى (L. major)المصابین بھذا الطفیلي.ذا حساسیة وخصوصیة عالیة عند التفریق بین أنواع اللشمانیا الجلدیة عند PCR الاستنتاج: نستنتج من الدراسة الحالیة أن استخدام تقنیة المقارنتھا بالطرق التقلیدیة وقد بینت النتائج المستحصلة من ھذه التقنیة أن ھنالك نوعین من طفیلي اللشمانیا الجلدیة للمصابین تم التحري عنھا فيمحافظة النجف الاشرف .في التشخیص والتفریق بین انواع اللشمانیا الجلدیة .


Article
Oral lichenoid reactions: A clinico-pathological study

Authors: Sabah M SAKA --- Abbas F HUSSAIN
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2002 Volume: 2 Issue: 4 Pages: 198-200
Publisher: Mosul University جامعة الموصل

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Abstract

Eleven hypertensive and nine diabetic patients under treatment with appropriate therapy show oral mucosal lesions mimic lichen planus. The clinical and histological features of the lesions were studied. Stress was made on the type and distribution of the inflammatory infiltrate seen in the histologic section of the lesions. It was found that the infiltrates show features differ from the infiltrate demonstrated in conventional lichen planus.


Article
Six-months treatment with cabergoline in 10 acromegalic patients

Author: Dr. Arwaa Abed Abdul-Hussien MBChB, FICMS
Journal: KUFA MEDICAL JOURNAL مجلة الكوفة الطبية ISSN: 1993517X Year: 2009 Volume: 12 Issue: 2 Pages: 124-127
Publisher: University of Kufa جامعة الكوفة

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Abstract

Background: Cutaneous drug reactions are the most common adverse reactions attributed to drugs. Any skin disorder can be imitated, induced or aggravated by drugs. Aims:The present study was carried out to determine the age, sex incidence and clinical pattern of drug eruptions, to recognize offending drugs (self medication or prescribed), to evaluate mortality and morbidity associated with drugs, to educate the patients, and to avoid self-administration of drugs and re-administration of the offending drugs. Methods: The diagnosis of cutaneous drug reactions is mainly based on detailed history and correlation between drug intake and the onset of rash. Two hundred patients (109 males and 91 females) present with cutaneous drug reactions were studied.Results: Fixed drug eruption was seen in 57 patients; other cases were; urticaria and angioedema in 34, morbilliform rash in 33, pruritus in 25, Stevens Johnson (SJ) syndrome in three, purpura in six, exfoliative dermatitis in five, photosensitivity in six, Toxic Epidermal Necrolysis in one, acneiform eruption in eleven, and erythema multiforme in seven patients. The most frequently affected age group was 41-50 years, followed by the 21-30 and 31-40 years age groups. The youngest patient was one year old and the oldest was 80 years old. The period of development of lesions after the intake of drug(s) varies from 01-45 days. Cotrimoxazole was the offending drug in 28 (14%) of cases, followed by Ibuprofen in 22 (11%) of cases. Conclusions:Fixed drug eruption was the most common drug eruption seen. Cotrimoxazole was the most common cause of drug eruptions.


Article
Study in Kinetics of Saponification Reaction of Diethyl Adipate with Sodium Hydroxide Solution under Reactive Distillation

Authors: Raghad fareed kasim --- rouaa ali shokorr
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2016 Volume: 17 Issue: 1 Pages: 99-108
Publisher: Baghdad University جامعة بغداد

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Abstract

This research presents a new study in kinetics under reactive distillation by using consecutive two – step reaction : the saponification reaction of diethyl adipate with sodium hydroxide solution . The distillation process takes the role of withdrawing the intermediate product (sodium monoethyladipate SMA) which otherwise converts to the final product of low purity.The effect of three parameters were studied through a design of experiments applying 23 factorial design. These parameters were : the mole ratio of DA to NaOH solution (0.1 and 1) , NaOH solution concentration (3 N and 8 N) , and batch time (1.5 hr. and 3.5 hr.) . The conversion of DA to sodium monoethyladipate(SMA)(intermediate product) was the effect of these parameters which was detected .The results showed that increasing mole ratio of DA to NaOHsolution increases the conversionto a maximum value within the range of study.The effect of NaOH solution concentration decreases the conversion to a specified value within the range of study . The effect of batch time on conversion was decreasing the conversion to a specified value within the range of study . The maximum attainable conversion within the studied range of parameters was eighteen fold of thebase case.Reaction rate constant k and the order of reaction n of first reaction weredetrminedusing the differential method . The study attempted to determine n and k under the maximum conversion condition obtained in this system which corresponds to : feed mole ratio of diethyl adipateDA to NaOH solution of 0.3,NaOH solution concentration of3 Nandtime of1.5 hr.The study showed that the reaction order was 1.5and reaction rate constant was 0.8m3/kmol.s at a temperature of 100 ℃ .


Article
Synthesis of new metoclopramide derivatives and in vitro evaluation of their human cholinesterases protection against Chlorpyrifos

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Abstract

Objective: The purpose of this study was to synthesize three new derivatives ofmetoclopramide by diazotization and replacement reactions and then to quantify invitro their protection effects on blood cholinesterases using chlorpyrifos as a potentinhibitor.methods: The three new metoclopramide derivatives were synthesized viaSandmeyer reaction, the chemical structures of these derivatives were identified byphysico-chemical and spectroscopic (U.V. and FTIR) techniques.Results and conclusion: The results of in vitro evaluation of their humancholinesterases inhibition and protection against chlorpyrifos indicated that the (OH)functional group binds to cholinesterase (ChE) at the same organophosphorous (OP)binding site and shows some competition and protection ability but not to a significantdegree, while the (Cl and I) functional groups bind to the ChE at site differs from OPbinding site, as well as the (I) functional group has more selectivity for enzymemoiety and binds more strongly than the (Cl) group, so that shows more ChEinhibiting ability

الأهداف: إن الغرض من هذه الدراسة هو تصنيع ثلاث مشتقات جديدة من عقار الميتوكلوبرامايد باستخدام سلسلة من التفاعلات الاستعاضة الكيميائية ثم تقيم مدى قابليتهم على حماية خميرة الكولين استراز في دم الإنسان ضد المثبطات القوية باستخدام المثبط الفعال الكلوربايريفوس خارج جسم الكائن الحي.طرق العمل: تم تصنيع ثلاثة مشتقات جديدة من الميتوكلوبرامايد باستعمال تفاعل ساندماير كما تم التأكد من أشكالها الكيميائية بواسطة التعرف على الخواص الفيزيوكميائية وأطياف الأشعة تحت الحمراء وفوق البنفسجية.النتائج والاستنتاج: قد دلت نتائج الدراسة على أن مجموعة الهيدروكسيل الفعالة ترتبط بخميرة الكولين استيراز بنفس موقع ارتباط مركبات الفوسفات العضوية لذلك فقد أبدت بعض المنافسة وبالتالي بعض الحماية لهذه الخميرة ولكن ليس إلى الدرجة الهامة، بينما مجموعتي الكلورايد والايودايد الفعالتين ترتبطان بخميرة الكولين استيراز بموقع مختلف عن موقع ارتباط مركبات الفوسفات العضوية مع إن مجموعة الايودايد قد أبدت انتقائية أكبر تجاه الارتباط بالخميرة من مجموعة الكلورايد .


Article
Spectrophotometric Determination of Trimethoprim in Pure Form and Pharmaceutical Formulations with Metol and potassium hexacyanoferrate (ΙΙΙ)

Author: Ayad M.R. Raauf Ayad M.R. Raauf
Journal: Tikret Journal of Pharmaceutical Sciences مجلة تكريت للعلوم الصيدلانية ISSN: 18172716 Year: 2012 Volume: 8 Issue: 2 Pages: 217-228
Publisher: Tikrit University جامعة تكريت

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Abstract

A simple, sensitive and accurate spectrophotometric method of determination of trimethoprim (TMP) in pure form and pharmaceutical formulation. The method is based on the formation of (TMP) complex. The reaction between of the trimethoprim with the mixture of metol and potassium hexacyanoferrate (ΙΙΙ) was evaluated for the spectrophotometric determination of the trimethoprim. The maximum absorbance of the colored complex occurred at λ=540nm. Reaction conditions have been optimized to obtain (TMP) complex of high sensitivity and longer stability. Under optimum conditions the absorbance of the (TMP) complex where found to increase linearly with increase in concentration of the trimethoprim, which corroborated with correlation coefficient value. The concentration ranges are 10-100 µg mL-1 with detection limit 0.0286 µg mL-1 and relative standard deviation 0.74 % and relative error of prediction for drug were lower . The proposed method was successfully applied to determine of the selected trimethoprim in pure form and pharmaceutical formulations with good precision and accuracy compared to standard method as revealed by t- and F- values and the results obtained agree well with the labeled contents.


Article
Studying the Effect of Nano Additives and Coating on Some Properties of Cement Mortar Mixes
دراسة تأثير الطلاءات والمضافات النانوية على بعض الخواص لخلطات مونة الاسمنت

Authors: Sarmad.I.Ibrahim --- Alaa.A.Abdul Hameed --- Farhad. M. Othman
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 3 Part (A) Engineering Pages: 553-566
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The experimental work is divided in two parts, in the first part was prepared the mortar samples and mixing proportions cementsand (1:3)they were mixing these samples with nano scale ceramic powders (ZrO2 and TiO2) respectively the percentages by weight are taken from cement ratio (0.1, 1, 2.5, 5, and 10%) at particle size (50nm) and curing time (28day). The second part has included the preparation of mortar samples and then coated with a mixture of methanol alcohol, cement and ceramic nano-powders by cold spray technique by using compressed air at room temperature with pressure (8bar) and the spray distance (20Cm) and heating of the samples at (75C°), and then study mechanical thermal physical and structural properties for prepared samples. The results of mechanical and physical tests showed large and significant improvement for all mixed and coated samples with nanoparticles, and that the highest value of the mechanical and physical properties obtained from cement coated samples with (%5ZrO2), reaching the rate of increase in values of Vickers hardness by (%54), and wear resistance increased by (%66), while reaching the rate of decrease in values of total water absorption by (%79), The porosity has decreased at a rate of (%65), With regard to the dry density has increased at a rate of (%2.3). The higher values for the mixed samples reaching the rate of increase in values of Vickers hardness by (%38), and wear resistance increased by (%58), while reaching the rate of decrease in values of total water absorption by (%67), The porosity has decreased at a rate of (%51.68), With regard to the dry density has increased at a rate of (%1.9). The thermal conductivity test results have shown that there is a marked decrease in values conductivity for all mixed and coated samples with nanoparticles and that the minimum value of conductivity obtained from coated and mixed samples with (%5TiO2) as the value decreases conductivity for coated samples by (%64), while the lowest value for conductivity to the mixed samples by (%49). Results of Characterizations tests showed images of all of (SEM and AFM) Mortar reference sample that a high roughness as well as having to structure Ca(OH)2 a needle shaped structures with the presence of large pores, while after adding and coating by nanoparticles shows the disappearance of structures needle and produce a homogeneous structure of compounds (C-S-H) and the disappearance of the pores and gaps further decrease in surface roughness this explains the clear improvement in the properties.

ينقسم الجانب العملي الى جزئين، في الجزء الاول تم تحضير نماذج المونة وبنسبة خلط اسمنت/رمل (1:3) حيث تم خلط هذه النماذج مع مساحيق سيراميكية نانوية (ZrO2,TiO2) على التعاقب وبنسب وزنية مأخوذة من نسبة الاسمنت (10,5,2.5,1,0.1%) وبحجم حبيبي (50) نانومتر ووقت معالجة لمدة (28) يوم، اما الجزء الثاني فقد تضمن تحضير نماذج المونة ومن ثم طلاؤها بخليط من كحول الميثانول والاسمنت والمساحيق النانوية وبتقنية الرش البارد بأستخدام الهواء الجوي المضغوط بدرجة حرارة الغرفة عند ضغط (8) بار ومسافة رش بمقدار (20) سم، وتسخين اولي للقواعد لدرجة (75) درجة مئوية، ومن ثم دراسة الخصائص الميكانيكية والحرارية والفيزيائية والتركيبية للنماذج المحضرة.نتائج الفحوصات الميكانيكية والفيزيائية اظهرت تحسن كبير وملحوظ لجميع النماذج المخلوطة والمطلية مع الدقائق النانوية، وان القيمة الاعلى للخواص الميكانيكية والفيزيائية تم الحصول عليها من النماذج المطلية والمخلوطة مع (%5ZrO2)، حيث بلغت معدل الزيادة في قيم صلادة فيكرز بنسبة (%54)، ومقاومة البلى ازدادت بمعدل (%66)،بينما بلغ معدل النقصان بالامتصاص الكلي للماء بنسبة (%79)، اما المسامية فقد تناقصت بمعدل (%65)، وفيما يخص الكثافة فقد تزايدت بمعدل %2.3)). أما القيم الاعلى بالنسبة للنماذج المخلوطة ، حيث بلغت معدل الزيادة في قيم صلادة فيكرز المايكروية بنسبة (%38)، ومقاومة البلى ازدادت بمعدل (%58)، بينما بلغ معدل النقصان بالامتصاص الكلي للماء بنسبة (%67)، اما المسامية فقد تناقصت بمعدل (%52)، وفيما يخص الكثافة فقد تزايدت بمعدل %1.9)).أما نتائج فحص التوصيلية الحرارية فقد اظهرت ان هنالك نقصان ملحوظ في قيم التوصيلية ولجميع النماذج المخلوطة والمطلية مع الدقائق النانوية، وان القيمة الادنى للتوصيلية الحرارية تم الحصول عليها من النماذج المطلية والمخلوطة مع (%5 TiO2)، حيث بلغت قيمة النقصان بالتوصيلية للنماذج المطلية بنسبة (%64). اما بالنسبة للنماذج المخلوطة فقد بلغ مقدار النقصان (%49). نتائج الفحوصات التركيبية اظهرت صور كل من المجهر الالكتروني الماسح، ومجهر القوة الذرية لنموذج المونة المرجع انه ذا خشونة عالية وكذلك وجود لتركيب هيدروكسيد الكالسيوم Ca(OH)2 بشكل تراكيب ابرية الشكل مع وجود مسامات كبيرة، بينما اظهرت الصور بعد الاضافة والطلاء بالدقائق النانوية اختفاء التراكيب الابرية وانتاج تركيب متجانس من مركبات (C-S-H) واختفاء المسامات والفجوات علاوة على نقصان في خشونة السطح وهذا ما يفسر التحسن الواضح في الخواص.


Article
Investigation of Solid State Reaction in the Ternary Ti-Al-C, Cr-Al-C and V-Al-C Systems

Authors: A.A. Atiyah --- A. Al-Ghaban --- M.A.N. Al-Keshwan
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2017 Volume: 35 Issue: 7 Part (A) Engineering Pages: 764-771
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The main goal of this work is to understanding the requirements to realize the synthesis of MAX phases in bulk form at high temperature. The phase stability of three different MAX phase systems Ti-Al-C,Cr-Al-C and V-Al-C has been investigated along this line. High purity powders were used as raw materials. They were mixed and then compacted under the pressure of 20 MPa. The compacted mixture was heated in an Ar atmosphere at a temperature range of (1000-1400) °C for (2-4) h. Finally, the sample was cooled down to room temperature. X-ray diffraction indicates that systems show a direct formation of MAX phase under these conditions. The SEM and optical microscopy results were used to confirm the structural features of the ternary phases and the less segregation or agglomeration. The results of sintering temperatures versus final density were discussed in terms of physical properties evaluation and hardness for indicate the mechanical properties. Finally, the differential scanning calorimetric results over the range of 25 to 650 ºC show that the reactions in all systems related directly to the Al melting point. It is obvious that the reactions in all these systems started at ~600 ºC that may support this attitude. It is expected to contribute towards a better basic understanding of this fascinating class of solids. Furthermore, we try to evaluate the here-proposed novel low temperature synthesis for other Mn+1AXn systems. This may release a new synthesis route for the mass production of materials with rather unique properties.


Article
Evaluation of Awareness about Pharmacovigilance and Adverse Drug Reaction Monitoring among Medical Professionals Attending Central Leprosy Institute

Authors: Pugazhenthan Thangaraju --- Sajitha Venkatesan --- T. Tamilselvan --- Elavarasan Sivashanmugam --- et al.
Journal: Mustansiriya Medical Journal مجلة المستنصرية الطبية ISSN: 20701128 22274081 Year: 2018 Volume: 17 Issue: 2 Pages: 63-68
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Background: The introduction of pharmacovigilance (PV) program helps in very early detection of adverse drug reactions (ADRs) andidentification of risk factors and various measures to be taken once it happened. This study was aimed at investigating the knowledgeand attitude of doctors in a research institute about ADR reporting and suggesting possible ways of improving ADR reporting.Materials and Methods: This study was a cross‑sectional, questionnaire‑based survey conducted at a tertiary care leprosy hospital which is a research institute. The respondents were doctors and students visiting this institute. The study instrument was a self‑developed, prevalidated, semi‑structured questionnaire of 25 questions. Results: A total of 55 questionnaires were considered for analysis, giving a response rate of 100%. In all, 87.93% of the respondents were aware about pharmacovigilance, 68.96% were aware of ADR reporting system in India, 91.37% opined that only serious ADR with any medicine should be reported, and 4.3% believed that ADR should be reported only for newly marketed agents. Although 88.79% of the respondents observed an ADR, only 31.03% reported it; 60% were aware about the complete step to betaken after ADR. The general attitude of the respondents about ADR reporting was as follows: ADR reporting should be mandatory (60.34%),voluntary (29.31%), and need base (10.34%) and the preferred mode to report should be phone (34.48%), dropbox (22.41%), E‑mail (25.86%),and personal visit (8.6%). Nearly 77.58% of the respondents needed a complete feedback after the ADR reporting. Almost 51.72% of therespondents opted increasing awareness about PV through training/projects/continuing medical education, as the factor encouraging for ADR reporting, and 51.72% opted lack of knowledge about the process of reporting, as the factor discouraging ADR reporting. Conclusion: From the study, it was found that most of the doctors and students were unaware of the ADR reporting forms and their availability which should be sorted out in the institutional setting for better results.

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