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1 – 3 of 3Amin TermehYousefi, Samira Bagheri and Nahrizul Adib
Biotechnology is closely associated to microfluidics. During the last decade, designs of microfluidic devices such as geometries and scales have been modified and improved…
Abstract
Purpose
Biotechnology is closely associated to microfluidics. During the last decade, designs of microfluidic devices such as geometries and scales have been modified and improved according to the applications for better performance. Numerous sensor technologies existing in the industry has potential use for clinical applications. Fabrication techniques of microfluidics initially rooted from the electromechanical systems (EMS) technology.
Design/methodology/approach
In this review, we emphasized on the most available manufacture approaches to fabricate microchannels, their applications and the properties which make them unique components in biological studies.
Findings
Major fundamental and technological advances demonstrate the enhancing of capabilities and improving the reliability of biosensors based on microfluidic. Several researchers have been reported verity of methods to fabricate different devices based on EMS technology due to the electroconductivity properties and their small size of them. Therefore, controlled fabrication method of MEMS plays an important role to design and fabricate a highly selective detection of medical devices in a variety of biological fluids. Stable, tight and reliable monitoring devices for biological components still remains a massive challenge and several studies focused on MEMS to fabricate simple and easy monitoring devices.
Originality/value
This paper is not submitted or under review in any other journal.
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Keywords
Majid Balaei-Kahnamoei, Mohammad Al-Attar, Mahdiyeh Khazaneha, Mahboobeh Raeiszadeh, Samira Ghorbannia-Dellavar, Morteza Bagheri, Ebrahim Salimi-Sabour, Alireza Shahriary and Masoud Arabfard
Acute and chronic obstructive pulmonary disease (COPD) is a common and progressive lung disease that makes breathing difficult over time and can even lead to death. Despite this…
Abstract
Purpose
Acute and chronic obstructive pulmonary disease (COPD) is a common and progressive lung disease that makes breathing difficult over time and can even lead to death. Despite this, there is no definitive treatment for it yet. This study aims to evaluate the studies on single and combined herbal interventions affecting COPD.
Design/methodology/approach
In this study, all articles published in English up to 2020 were extracted from the Web of Science (WoS) database and collected using Boolean tools based on keywords, titles and abstracts. Finally, the data required for bibliographic analysis, such as the author(s), publication year, academic journal, institution, country of origin, institution, financial institution and keywords were extracted from the database.
Findings
A total of 573 articles were analyzed. The number of papers in the lung disease field showed an upward trend from 1984 to 2021, and there was a surge in paper publications in 2013. China, Korea and Brazil published the highest number of studies on COPD, and Chinese medical universities published the most papers. Three journals that received the highest scores in this study were the Journal of Ethnopharmacology, International Immunopharmacology and Plos One. In the cloud map, expression, activation and expression were the most frequently researched subjects. In the plus and author keywords, acute lung injury was the most commonly used word. Inflammation, expression of various genes, nitric oxide-dependent pathways, NFkappa B, TNFalpha and lipopolysaccharide-dependent pathways were the mechanisms underlying COPD. Scientometric analysis of COPD provides a vision for future research and policymaking.
Originality/value
This study aimed to evaluate the studies on single and combined herbal interventions affecting COPD.
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Keywords
Ourida Hellal, Malika Belhocine, Seddik Merakeb and Mohand Oussalem Mechiche
The study of structures subjected to seismic action is important in countries with high seismicity. However, observation of the damage caused to these structures shows that they…
Abstract
Purpose
The study of structures subjected to seismic action is important in countries with high seismicity. However, observation of the damage caused to these structures shows that they absorb much greater forces. The explanation lies largely in the energy dissipation mechanism. In particular, the structure’s overall behavior coefficient is “q”. The purpose of this study is to provide a method for evaluating the behavior factor and the comparison between two types of bracing of metal structures.
Design/methodology/approach
The aim is to provide a method for evaluating the overall behavior coefficient of structures braced with a centered bar system and an eccentric bar system and to carry out a comparative study between them. The work was carried out on three structures. The authors then estimated an average value for the “q” coefficient and a plastic hinge formation sequence was presented for each type.
Findings
As a result, the breaking of all structures is achieved by plasticization of the bars for centered bar bracing and by the formation of plastic hinges in the seismic eccentricity sections and then in the beams for eccentric bracing. The mean values of the behavior factors for centered and eccentric bar bracing are of the order of 3.5 and 2.5, respectively. The study showed that we are within the range recommended by Eurocode-8 in accordance with an average level of ductility.
Originality/value
The comparison between the types of bracing studied and the portal frame type shows that eccentric bar bracing is intermediate to the other two. This confirms the reliability of the study and is more dissipative than centered bar bracing.
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