Sami Publishing CompanyJournal of Chemical Reviews2676-68683120210101An Overview of the Paper Recycling Process in Iran11911805410.22034/jcr.2021.118054ENMohammad AbdollahbeigiMaster of Chemical Engineering, Chairman of the Board, Environment Engineer & Manufacturer of Packaging Cartons, Fars, IranJournal Article20200809Abstract In the present article, the process of paper recycling and bleaching of this process has been studied. Due to the spatial and temporal dispersion and the need to find appropriate mechanisms, especially in metropolitan areas, the collection of waste paper and cardboard is economically and environmentally inevitable. In industrialized countries, the process of collecting waste paper is organized in such a way that the waste paper is prevented from entering the waste cycle from the very beginning. But in third world countries, despite sufficient technical knowledge, for various reasons, including the lack of regulatory organizations, lack of sense of responsibility of professionals in the field of recycling, public ignorance, the process is economically, health and biologically the environment does not work well and it is necessary to pay attention to the correct collection of waste paper. Due to the presence of valuable materials in the composition of municipal solid waste, which is sometimes referred to as dirty gold, unfortunately, the municipality costs a lot of money to collect them (75 to 80%) and often this waste, which They can be recovered and buried in the ground by applying correct and technical planning based on accurate and reliable information. The results of this study showed that the most important factors affecting paper recycling are: economic factors, the most important of which are inflation, environmental factors, consumption patterns, raw materials, technology, Products. Also, the best way to collect waste paper for recycling is to separate it from the source.Sami Publishing CompanyJournal of Chemical Reviews2676-68683120210101Quorum sensing inhibitors: Current progress of the natural antimicrobials203911827410.22034/jcr.2021.118274ENMohammad AsifaDepartment of Pharmaceutical chemistry, Himalayan Institute of Pharmacy Research, Dehradun, (Uttarakhand), 248001, India0000-0002-9352-3462Journal Article20190311The misuses of antimicrobials in infectious diseases have led to the progress of extensive resistance in the infectious organisms. The unsuccessful of accessible antimicrobials to control infections makes it essential to discover alternatives to currently existing drugs. Their connection to infectious diseases and their natural ability increase antimicrobial resistance in microbes, has led to a platforms for research focused on new techniques to control them. In this affords we study, the pathogenicity in many bacteria is regulated by Quorum sensing (QS). The inhibition of QS system may causes the reduction of virulence and protect against bacterial infections. These bacteria rely on chemical communication (or QS) to coordinate activities necessary for their survival in groups by some course of action. Their dependence on QS has made those signaling systems within bacteria an attractive target for the design of new anti-infective agents. Compounds that can interrupt these processes are known as QS inhibitors. The QS is the key regulator of virulence in various bacteria. Various plants extracts and their chemical constituents were showed their effects on bacterial virulence factors by inhibiting of QS genes and QS-controlled factors and effects on bacterial growth. The anti-QS approach has promise in the fight against infections pathogens, thereby making the bacteria more susceptible to traditional antimicrobials. The QSIs may provide the newest weapon against infections involving drug-resistant bacterial strains. These QSIs come from a variety of sources and have a wide array of structures.Sami Publishing CompanyJournal of Chemical Reviews2676-68683120210101Voltage Stability of Wind Turbines Equipped with DFIG Based on PID-Based Control Method404911880610.22034/jcr.2021.118806ENEbadollah Amouzad MahdirajiDepartment of Engineering, Sari Branch, Islamic Azad University, Sari, IranAmir Yousefi TaloukiDepartment of Engineering, Sari Branch, Islamic Azad University, Sari, IranJournal Article20200330With the new structural changes of power system that has emerged in recent years, which makes manufacturing units transmit more and more electrical power from the transmission lines, it is expected that a wider voltage collapse in the power systems happens. In this paper, a new PID-based control method was used that provides a PCC-voltage feedback control to increase reactive power from wind-turbine equipped with a doubly-fed induction generator (DFIG) at high voltage drop. The proposed method is an improved control scheme for voltage collapse, by which a part of the wind energy that causes a network failure is temporarily stored in the rotor energy and the remained energy is kept until DC voltage and rotor current are in the hazardous parts. The purpose of the rotor side controller is to independently determine the stator active and reactive power, which the control of the reactive power using the rotor side converter can cause the stator voltage to remain constant in the desired range. The accuracy and performance of the proposed method were confirmed by simulating a typical power system, in the MATLAB/SIMULINK environment.Sami Publishing CompanyJournal of Chemical Reviews2676-68683120210101Investigation of Hydrate Formation Kinetics and Mechanism of Effect of Inhibitors on it, a Review506511886910.22034/jcr.2021.118869ENAlireza BozorgianDepartment of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, IranJournal Article20200801Abstract: Gaseous hydrates are ice-like compounds of water and gas that are usually formed at high pressures and low temperatures in such a way that in each of their constituent units a gas molecule is enclosed in a cage of water molecules. Gas hydrate was introduced by Hamrasmith in 1934 as one of the problems of the gas industry in transmission pipelines because by reducing the internal cross section of the pipe, it increases the pressure drop and sometimes may lead to complete blockage of the pipe. Hydrate formation can also lead to the destruction of tools in the process, including valves and sensors, or accumulate in storage tanks, increasing labor costs for cleaning. In industry, one of the thermal, mechanical, thermodynamic and kinetic methods is usually used to prevent the formation or elimination of hydrate. Thermal methods try to keep the gas away from the formation of hydrates by insulating the pipe, using rotating water or hot oil, or by electrically heating the pipe. The use of pigs is a mechanical method to remove clogged tubes due to hydrate formation. It is also possible to change the gas mixture by adding a third material to the fuzzy diagram and eliminate the possibility of hydrate formation at the temperature and operating pressure of the system. Kinetic methods help to improve the working conditions of the gas transmission system by increasing the latency or by reducing the growth rate or adhesion of hydrate crystals.Sami Publishing CompanyJournal of Chemical Reviews2676-68683120210101An Overview of Gas Overflow in Gaseous Hydrates668211887010.22034/jcr.2021.118870ENMasood Bagheri SadrDepartment of Chemical Engineering,Alireza BozorgianDepartment of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, IranJournal Article20200801Basically, the design of the gas extraction supplementary string is specific to wells in which the pressure column of the fluid produced is close to or higher than the reservoir pressure. If the reservoir pressure cannot overcome the column of fluid produced or this pressure difference leads to production with low flow, the brain tube must be used. In this way, by pumping gas through this string and lightening the column and producing from the circular space, they solve the problem. In this way, after pumping, the gas comes out of the side of the suction valve and lightens the fluid column. It should be noted, however, that reducing the diameter of the production cavity created by driving such filaments increases the velocity of the fluid and gives the fluid less opportunity to lose its soluble gas. It is obvious that the use of several lateral positions of the overflow valve in the field of overflow with gas has made it possible to inject gas from several points. In the continuous flow of ascent with base gas and the general rule, the energy resulting from the expansion of gas is from a high pressure to a low pressure that can be used to develop and increase the flow of fluid in the well. The use of this energy is generally continuous, which is in the form of continuous injection of gas into the fluid inside the well.Sami Publishing CompanyJournal of Chemical Reviews2676-68683120210101The Effect of Air Pollution on Myocardial Infarction839611921510.22034/jcr.2021.119215ENYosra RazianiCollege of Medicine, Department of Nursing, Komar University of Science and Technology- Sulaimaniyah-Kurdistan Region, IraqSheno RazianiMaster of Psychology, Department of Literature and Humanities, Graduate of Malayer University, Malayer, IranJournal Article20200508Myocardial infarction is a common phenomenon among people and kills many people every year. However, for many people, the question is whether the origin of this disease was nutrition or many factors played a role in it. It is necessary. The phenomenon of myocardial infarction should be studied with its marginal factors, so with this in mind, it is necessary to conduct research in this field to investigate the factors involved in the development of myocardial infarction. Therefore, the present study is important because It can evaluate the role of air pollution in myocardial infarction. Myocardial infarction (in the medical term of MRI) or myocardial infarction. Permanent and irreversible cell death and death in a part of the heart muscle (myocardium) that occurs due to loss of blood flow and the occurrence of a severe ischemia in that part of the heart. This cessation of blood circulation can occur suddenly without any previous symptoms or after a number of angina attacks (chest pain). The main cause of stroke is the closure of the arteries that supply the heart. To remove obstruction other than medication, open balloons and open-heart surgery replacement of blocked arteries) are used. Myocardial infarction is a pervasive complication that causes thousands of deaths each year. Factors contributing to diabetes include high blood pressure, high blood cholesterol, excessive smoking and alcohol use, physical inactivity, stress, family history, and age.Sami Publishing CompanyJournal of Chemical Reviews2676-68683120210101Misfolded structures | A brief insight into protein aggregation criteria, which may lead to Proteopathy diseases.9710811943310.22034/jcr.2020.256367.1092ENSirvan AbbasbeigiMaster of cellular and molecular science/biochemistry field of study, Islamic Azad University (IAU), Science and Research Branch, Sanandaj, Iran.Journal Article20200708Diseases resulting from protein accumulations can be described mainly by improper folding and aggregation of endogenous proteins in affected tissues such as the brain or the heart. During misfolding and aggregation, the affected protein often loses its normal function, becomes more resistant to degradation, and often acquires toxic functions that can cause organ damage. Proteins generally require specific three-dimensional conformations in order to be soluble and function correctly in the body. Under stress conditions, normally soluble proteins can undergo structural changes and self-assembly, leading to their aggregation into insoluble deposits, referred to as amyloids. Amyloids from different proteins share several structural properties: they all have a fibrillar morphology and cross-β structure, whereby intermolecular main-chain hydrogen bonding acts as one primary stabilizing interaction. In conclusion, protein aggregation is the process by which misfolded proteins adopt a conformation that causes its polymerization into aggregates and organized fibrils. Many neurodegenerative diseases (amyloidoses) are associated with protein aggregation, though smaller oligomeric forms of the misfolded (amyloidogenic) proteins have been implicated as the causative agent. This study investigates those factors involved in disease and abnormalities arising from protein aggregation one by one. Also, it can be reviewed as a comprehensive glance for the process of protein aggregation whether from a structural or clinical point of view.