American Journal of Scientific Research and Essays

Analysis of Solvent Effect on Formation Constants and Speciation of Cobalt(II), Copper(II) and Lead(II) Complexes of L-Methionine and Uracil

Research article of American Journal of Scientific Research and Essays Analysis of Solvent Effect on Formation Constants and Speciation of Cobalt(II), Copper(II) and Lead(II) Complexes of L-Methionine and Uracil 1Ishola, K.T.*,  2Oladipo, M.A.,3Ajayeoba, T. A. and 1Odedokun, O.A. 1 Department of Chemistry, Federal College of Education,(Special), Oyo,Oyo state,Nigeria. 2 Department of Chemistry, Ladoke Akintola University of Technology,Ogbomoso, Oyo state,Nigeria 3Department of Chemistry, Obafemi Awolowo University, Ile-ife, Osun State, Nigeria. The analysis of coordination of chelating agents to metal ions in the formation of complexes under different experimental conditions provide information on the effects of the conditions on the extent of the coordination of the ligands to the metal ions for potential applications in bioinorganic and environmental Inorganic Chemistry. The effect of solvent on the coordination of L-methionine (primary ligand) and uracil (secondary ligand) to Co(II), Cu(II) and Pb(II) ions in the formation of binary and ternary complexes have been potentiometrically investigated in water and 40% (v/v) ethanol- water media at 27 °C and ionic strength of 0.02 mol dm–3was maintained by using NaNO3. The proton-ligand stability constants and formation constants of the binary and ternary systems were established under the experimental conditions. The formation constants of the ternary complexes were numerically compared with the corresponding binary complexes in terms of Δ log K and percentage relative stabilization (%RS). Speciation of the metal ions, binary and ternary complexes as a function of pH in the solutions was investigated by using HYSS program. The ligands were observed to form more stable ternary complexes than binary complexes. The proton-ligand stability constants the ligands and the formation constants of the metal complexes were found to be higher in 40% (v/v) ethanol-water than water. The distribution of the species revealed a decrease in the metal ion concentrations with increase in the concentrations of the binary and ...


Review article of American Journal of Scientific Research and Essays BURNOUT SYNDROME AMONG MEDICAL STUDENTS: AN INTEGRATIVE REVIEW Eduardo Tomilheiro de Farias¹*; Mateus Cotias Filizola2; Wirley Matias Alves Martins Duarte3; William Barros Agrelli Girão4; Lívia Lócio Rosado de Oliveira 5; Edmundo de Oliveira Gaudêncio6 1,2,4 Estudante do Curso de Medicina da Universidade Federal de Pernambuco – UFPE; 5 Estudante do Curso de Medicina da niversidade Pernambucana de Saúde 3 Estudante do Curso de Medicina da Universidade UFCG  6Professor Associado II da Universidade Federal de Campina Grande. Introduction: Burnout Syndrome is conceptualized as a result of chronic stress in the workplace, characterized as a psychological syndrome composed of emotional exhaustion, depersonalization and reduced personal fulfillment. The prevalence of this syndrome in medical students is quite expressive, and the more the student is exposed to the academic cycle, the greater the risk of developing an anxiety disorder, especially Burnout Syndrome. Objectives: To analyze in the literature the correlation between Anxiety Disorders, Burnout Syndrome and Medical Students. Methodology: The research took place in the CAPES, PubMed and VHL Regional Portal. The terms “burnout”, “anxiety disorders” and “medical students” were considered as descriptors. Articles published between 2014 and 2019 were included. Results: Of the 69 articles found, only six were included in the review. Evidence was found that there is an association relationship between medical study and student mental exhaustion. It was also relating the time of exposure to the course with a higher prevalence of mental disorders. Relaxation techniques have shown a decline in Burnout’s cognitive and emotional stress and anxiety. Conclusion: Burnout Syndrome is a reality among medical students. However, despite the importance of the theme, the literature on this correlation is incipient. There is a need for further investigations into strategies that aim to reduce the incidence, and consequently the prevalence of ...

Maintenance of Bullet Train Based on Mathematical Planning and Workshop Scheduling

Research article of American Journal of Scientific Research and Essays Maintenance of Bullet Train Based on Mathematical Planning and Workshop Scheduling Hairui Zhang1*, Zhong Zheng2, Yu Cao1 1College of Science, China Three Gorges University, Yichang, 443002, China. 2College of Electrical Engineering & New Energy, China Three Gorges University, Yichang, 443002, China. Nowadays, bullet train service stations often suffer from the phenomenon of low operating efficiency due to the unreasonable arrangement of bullet trains that stay in service stations for too long. In order to solve this problem, based on the information of bullet train arrival in two periods of a bullet train service station, this paper comprehensively considered the input source, queuing rules and overhaul intensity of the train service system, determined the objective function and multiple constraint conditions, and established the 0-1 programming model and Uncorrelated Parallel Machine Optimization Model. The model established in this paper can relieve the load pressure of bullet train service station to a great extent, improve the operation efficiency of the service station under the condition of ensuring the maintenance quality of bullet train, and provide theoretical basis for realizing the shortest maintenance time of bullet train service station. Keywords: 0-1 programming; Queuing theory; Nncorrelated parallel machine; Fruit fly optimization algorithm; Workshop scheduling ...


Research article of American Journal of Scientific Research and Essays ABUSIVE USE OF DRUGS CONTROLLED BY THE USERS OF FAMILY HEALTH STRATEGY THE USERS OF THE IPAUMIRIM FAMILY HEALTH STRATEGY - CEARÁ Carla Suzana Balbino da Silva Miranda¹*, Antonio Aury de Macêdo Torquato², Adaires Fontes Balbino³ ¹Mestranda na Universidade Estadual do Ceará (UECE) ²Estratégia Saúde da Família – Prefeitura Municipal de Ipaumirim – Ceará; ³Centro de Apoio Psicossocial – Prefeitura Municipal de Lavras – Ceará. Introduction Benzodiazepines (BZD) are drugs that act directly on the central nervous system, altering cognitive and psychomotor aspects. In Brazil, it is the third class of most prescribed drugs, being used by approximately 4% of the population. The restricted, rational and short-term use of benzodiazepines is not observed on a large scale by professionals who attend the Ipaumirim Family Health Strategy, due to the high number of people who just want the revenue renewal. General Objective: To develop an action plan to promote the reduction of drug abuse controlled by users of the Ipaumirim Family Health Strategy - CE. Methodology: This is an intervention project that consists of an action proposal to face a real problem. The interventions were performed at the Basic Health Unit of Ipaumirim - CE, from June 18 to August 16, 2018 with evaluation every three months, with 36 users. Identification was performed through medical records, interviews in routine consultations. Results: the lack of information from users was clear, resulting in changes in actions involving primary care to alternative treatments such as physical activity, food reeducation and psychotherapy, stimulating actions such as the booklet, an organizational basis, since it does not have the horus system. Conclusion: the study effectively allowed the development of a new health promotion strategy. Keywords: Use, Benzodiazepines, Abuse, Reduction ...

Prof. Dr. Mohammad Mehdi Rashidi
Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management, Systems, Tongji Clean Energy Institute of advanced studies- Tongji University.

Dr. Milena Palczewska
Vice Dean for student affairs, Military Faculty, War Studies University, al. gen. Antoniego Chruściela “Montera” 10300-910 Warszawa

Dr. Piyush Chaudhary
Assistant Professor, Deptt of Ras Shastra (Ayurvedic Pharmaceutics), Incharge, Gurukul Pharmacy, MSM Institute of Ayurveda, BPS Women University, Khanpur Kalan, Sonepat, Haryana

Dr. M. M. Awad
Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt

Dr.Eng. Ahmed Kadhim Hussein
College of Engineering, Department of Mechanical Engineering, Babylon University, Babylon City, HIILA , IRAQ

Dr. KATSURA Hidemitsu 
Guest Lecturer for ICEEE-2016, Coimbatore Institute of Technology (CIT) in COIMBATORE, TAMIL NADU 641014, INDIA

Dr. Sang-Bing Tsai
Prof., School of Business, Dalian University of Technology, Panjin, 124221, China; Prof., Zhongshan Institute, University of Electronic Science and Technology of China; Prof., TEDA College, Nankai University, China

Dr. Deepmala 
Visiting Scientist, SQC & OR Unit, Indian Statistical Institute

Dr. Begum Sertyesilisik
Assoc. Prof. at the Istanbul Technical University

Dr. Palani Elumalai
National Research Foundation Fellow of Korea, Department of Chemistry & Biology, University of Ulsan

Dr. Shittu Lukeman Adelaja Joseph

Prof. Dr. Naqib Ullah Khan
Department of Plant Breeding and Genetics, The University of Agriculture, Peshawar 25130, Khyber Pakhtunkhwa, PAKISTAN.

Dr. V. Ananthaswamy
Assistant Professor, The Madura College (Autonomous), Madurai – 625 011, Tamil Nadu, India.

Prof. Dr. M.Nageeb Rashed
Professor of Analytical and Environmental Chemistry, Faculty of Science, Aswan University, Egypt

Dr. Hossein Kazemian
Faculty& Director; Northern Analytical Lab Services (NALS), University of Northern British Columbia (UNBC), 3333 University Way, Prince George, BC, Canada, V2N 4Z9

Dr. Vishnu Narayan Mishra
Applied Mathematics and Humanities Department, Sardar Vallabhbhai National Institute of Technology.

Dr. Balaram Kundu
Associate Professor, Department of Mechanical Engineering, Jadavpur University, Kolkata – 700 032, INDIA

Dr. Sergio Nardini
Associate Professor, Dipartimento di Ingegneria Industriale e dell’Informazione, Seconda Università degli Studi di Napoli, via Roma 29, 81031 Aversa (CE)

Dr. Sanjay Mishra
Professor, Department of Biotechnology, School of Engineering & Technology, IFTM University

Dr. Lakshmi Narayan Mishra
Professor, Department of Mathematics, National Institute of Technology

Dept.of Mathematics, Assistant Professor In Mathematics, Govt. Degree & PG College

Dr. S. Krishna Murthy
Associate Professor, Department of Applied Mathematics,Defence Institute of Advanced Technology, Deemed University(DU), Girinagar, Pune

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1. Shuo Zhang. Experimental study on scouring of coarse sand and fine sand seabed caused by propeller washing in front of solid wharf.American Journal of Scientific Research and Essays, 2018 3:14. DOI:10.28933/ajsre-2018-12-1805 
2.Zhang Bo and Xie Xionggang. Numerical simulation and analysis of coupled Thermal-Hydrological-Mechanical in coalbed methane heating mining. American Journal of Scientific Research and Essays, 2018 3:13. DOI:10.28933/ajsre-2018-12-0808 

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