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Rashidi T, Shakeri A. Effects of nano zinc oxide and nano chitosan on the taste masking paracetamol granules. Drug Dev Ind Pharm 2024:1-16. [PMID: 38718260 DOI: 10.1080/03639045.2024.2353096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Accepted: 05/03/2024] [Indexed: 05/22/2024]
Abstract
OBJECTIVE The purpose of this study is to investigate the taste masking of Paracetamol granules in the range of 250-850 µm, coated by two nanocomposites prepared from Eudragit® E100, nanozinc oxide, and nanochitosan, respectively, from 1 to 5% by the weight of the granules. METHODS In this study, Paracetamol granules were coated in several formulas with two different types of nanocomposites (polymeric and mineral) on two sizes of granules to reduce bitter taste and with the FBC method and pH-sensitive polymers (Eudragit® E100). RESULTS The effect of nanoparticles (Nano zinc oxide and Nanochitosan) on taste-masking Paracetamol was studied with dissolution-coated granules in vitro by simulating in the oral (pH 6.8) range. Based on the results of the studies, the rate of drug release was confirmed by the taste test, and the formulated granule with 5% nano-chitosan (F14) had the best bitter taste mask function of all samples. These results were also confirmed by scanning electron microscopy (SEM) analysis, which showed a smoother and more stable surface than the samples obtained from other formulations. CONCLUSION In the comparison of the release of two types of nanocomposites in the dissolution test, it was shown that the type B granules of Paracetamol's 5% nano-chitosan-coated granule (F14) were released 99% less than Paracetamol's 5% nano-ZnO-coated granule (F11). and Paracetamol's 1% nano-chitosan-coated granule (F12) was released 91% less than Paracetamol's 1% nano-ZnO-coated granule (F9). The results showed that nano-chitosan-coated granules have better coverage of bitter taste instead of nano-ZnO.
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Affiliation(s)
- Tina Rashidi
- School of Chemistry, Alborz Campus, University of Tehran, Tehran, Iran
| | - Alireza Shakeri
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
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Global burden of 288 causes of death and life expectancy decomposition in 204 countries and territories and 811 subnational locations, 1990-2021: a systematic analysis for the Global Burden of Disease Study 2021. Lancet 2024; 403:2100-2132. [PMID: 38582094 DOI: 10.1016/s0140-6736(24)00367-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 02/15/2024] [Accepted: 02/22/2024] [Indexed: 04/08/2024]
Abstract
BACKGROUND Regular, detailed reporting on population health by underlying cause of death is fundamental for public health decision making. Cause-specific estimates of mortality and the subsequent effects on life expectancy worldwide are valuable metrics to gauge progress in reducing mortality rates. These estimates are particularly important following large-scale mortality spikes, such as the COVID-19 pandemic. When systematically analysed, mortality rates and life expectancy allow comparisons of the consequences of causes of death globally and over time, providing a nuanced understanding of the effect of these causes on global populations. METHODS The Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2021 cause-of-death analysis estimated mortality and years of life lost (YLLs) from 288 causes of death by age-sex-location-year in 204 countries and territories and 811 subnational locations for each year from 1990 until 2021. The analysis used 56 604 data sources, including data from vital registration and verbal autopsy as well as surveys, censuses, surveillance systems, and cancer registries, among others. As with previous GBD rounds, cause-specific death rates for most causes were estimated using the Cause of Death Ensemble model-a modelling tool developed for GBD to assess the out-of-sample predictive validity of different statistical models and covariate permutations and combine those results to produce cause-specific mortality estimates-with alternative strategies adapted to model causes with insufficient data, substantial changes in reporting over the study period, or unusual epidemiology. YLLs were computed as the product of the number of deaths for each cause-age-sex-location-year and the standard life expectancy at each age. As part of the modelling process, uncertainty intervals (UIs) were generated using the 2·5th and 97·5th percentiles from a 1000-draw distribution for each metric. We decomposed life expectancy by cause of death, location, and year to show cause-specific effects on life expectancy from 1990 to 2021. We also used the coefficient of variation and the fraction of population affected by 90% of deaths to highlight concentrations of mortality. Findings are reported in counts and age-standardised rates. Methodological improvements for cause-of-death estimates in GBD 2021 include the expansion of under-5-years age group to include four new age groups, enhanced methods to account for stochastic variation of sparse data, and the inclusion of COVID-19 and other pandemic-related mortality-which includes excess mortality associated with the pandemic, excluding COVID-19, lower respiratory infections, measles, malaria, and pertussis. For this analysis, 199 new country-years of vital registration cause-of-death data, 5 country-years of surveillance data, 21 country-years of verbal autopsy data, and 94 country-years of other data types were added to those used in previous GBD rounds. FINDINGS The leading causes of age-standardised deaths globally were the same in 2019 as they were in 1990; in descending order, these were, ischaemic heart disease, stroke, chronic obstructive pulmonary disease, and lower respiratory infections. In 2021, however, COVID-19 replaced stroke as the second-leading age-standardised cause of death, with 94·0 deaths (95% UI 89·2-100·0) per 100 000 population. The COVID-19 pandemic shifted the rankings of the leading five causes, lowering stroke to the third-leading and chronic obstructive pulmonary disease to the fourth-leading position. In 2021, the highest age-standardised death rates from COVID-19 occurred in sub-Saharan Africa (271·0 deaths [250·1-290·7] per 100 000 population) and Latin America and the Caribbean (195·4 deaths [182·1-211·4] per 100 000 population). The lowest age-standardised death rates from COVID-19 were in the high-income super-region (48·1 deaths [47·4-48·8] per 100 000 population) and southeast Asia, east Asia, and Oceania (23·2 deaths [16·3-37·2] per 100 000 population). Globally, life expectancy steadily improved between 1990 and 2019 for 18 of the 22 investigated causes. Decomposition of global and regional life expectancy showed the positive effect that reductions in deaths from enteric infections, lower respiratory infections, stroke, and neonatal deaths, among others have contributed to improved survival over the study period. However, a net reduction of 1·6 years occurred in global life expectancy between 2019 and 2021, primarily due to increased death rates from COVID-19 and other pandemic-related mortality. Life expectancy was highly variable between super-regions over the study period, with southeast Asia, east Asia, and Oceania gaining 8·3 years (6·7-9·9) overall, while having the smallest reduction in life expectancy due to COVID-19 (0·4 years). The largest reduction in life expectancy due to COVID-19 occurred in Latin America and the Caribbean (3·6 years). Additionally, 53 of the 288 causes of death were highly concentrated in locations with less than 50% of the global population as of 2021, and these causes of death became progressively more concentrated since 1990, when only 44 causes showed this pattern. The concentration phenomenon is discussed heuristically with respect to enteric and lower respiratory infections, malaria, HIV/AIDS, neonatal disorders, tuberculosis, and measles. INTERPRETATION Long-standing gains in life expectancy and reductions in many of the leading causes of death have been disrupted by the COVID-19 pandemic, the adverse effects of which were spread unevenly among populations. Despite the pandemic, there has been continued progress in combatting several notable causes of death, leading to improved global life expectancy over the study period. Each of the seven GBD super-regions showed an overall improvement from 1990 and 2021, obscuring the negative effect in the years of the pandemic. Additionally, our findings regarding regional variation in causes of death driving increases in life expectancy hold clear policy utility. Analyses of shifting mortality trends reveal that several causes, once widespread globally, are now increasingly concentrated geographically. These changes in mortality concentration, alongside further investigation of changing risks, interventions, and relevant policy, present an important opportunity to deepen our understanding of mortality-reduction strategies. Examining patterns in mortality concentration might reveal areas where successful public health interventions have been implemented. Translating these successes to locations where certain causes of death remain entrenched can inform policies that work to improve life expectancy for people everywhere. FUNDING Bill & Melinda Gates Foundation.
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Yehualashet SS, Yesuf SA, Yezli S, Yiğit A, Yiğit V, Yigzaw ZA, Yismaw Y, Yon DK, Yonemoto N, Younis MZ, Yu C, Yu Y, Yusuf H, Zahid MH, Zakham F, Zaki L, Zaki N, Zaman BA, Zamora N, Zand R, Zandieh GGZ, Zar HJ, Zarrintan A, Zastrozhin MS, Zhang H, Zhang N, Zhang Y, Zhao H, Zhong C, Zhong P, Zhou J, Zhu Z, Ziafati M, Zielińska M, Zimsen SRM, Zoladl M, Zumla A, Zyoud SH, Vos T, Murray CJL. Global incidence, prevalence, years lived with disability (YLDs), disability-adjusted life-years (DALYs), and healthy life expectancy (HALE) for 371 diseases and injuries in 204 countries and territories and 811 subnational locations, 1990-2021: a systematic analysis for the Global Burden of Disease Study 2021. Lancet 2024; 403:2133-2161. [PMID: 38642570 PMCID: PMC11122111 DOI: 10.1016/s0140-6736(24)00757-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 03/07/2024] [Accepted: 04/12/2024] [Indexed: 04/22/2024]
Abstract
BACKGROUND Detailed, comprehensive, and timely reporting on population health by underlying causes of disability and premature death is crucial to understanding and responding to complex patterns of disease and injury burden over time and across age groups, sexes, and locations. The availability of disease burden estimates can promote evidence-based interventions that enable public health researchers, policy makers, and other professionals to implement strategies that can mitigate diseases. It can also facilitate more rigorous monitoring of progress towards national and international health targets, such as the Sustainable Development Goals. For three decades, the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) has filled that need. A global network of collaborators contributed to the production of GBD 2021 by providing, reviewing, and analysing all available data. GBD estimates are updated routinely with additional data and refined analytical methods. GBD 2021 presents, for the first time, estimates of health loss due to the COVID-19 pandemic. METHODS The GBD 2021 disease and injury burden analysis estimated years lived with disability (YLDs), years of life lost (YLLs), disability-adjusted life-years (DALYs), and healthy life expectancy (HALE) for 371 diseases and injuries using 100 983 data sources. Data were extracted from vital registration systems, verbal autopsies, censuses, household surveys, disease-specific registries, health service contact data, and other sources. YLDs were calculated by multiplying cause-age-sex-location-year-specific prevalence of sequelae by their respective disability weights, for each disease and injury. YLLs were calculated by multiplying cause-age-sex-location-year-specific deaths by the standard life expectancy at the age that death occurred. DALYs were calculated by summing YLDs and YLLs. HALE estimates were produced using YLDs per capita and age-specific mortality rates by location, age, sex, year, and cause. 95% uncertainty intervals (UIs) were generated for all final estimates as the 2·5th and 97·5th percentiles values of 500 draws. Uncertainty was propagated at each step of the estimation process. Counts and age-standardised rates were calculated globally, for seven super-regions, 21 regions, 204 countries and territories (including 21 countries with subnational locations), and 811 subnational locations, from 1990 to 2021. Here we report data for 2010 to 2021 to highlight trends in disease burden over the past decade and through the first 2 years of the COVID-19 pandemic. FINDINGS Global DALYs increased from 2·63 billion (95% UI 2·44-2·85) in 2010 to 2·88 billion (2·64-3·15) in 2021 for all causes combined. Much of this increase in the number of DALYs was due to population growth and ageing, as indicated by a decrease in global age-standardised all-cause DALY rates of 14·2% (95% UI 10·7-17·3) between 2010 and 2019. Notably, however, this decrease in rates reversed during the first 2 years of the COVID-19 pandemic, with increases in global age-standardised all-cause DALY rates since 2019 of 4·1% (1·8-6·3) in 2020 and 7·2% (4·7-10·0) in 2021. In 2021, COVID-19 was the leading cause of DALYs globally (212·0 million [198·0-234·5] DALYs), followed by ischaemic heart disease (188·3 million [176·7-198·3]), neonatal disorders (186·3 million [162·3-214·9]), and stroke (160·4 million [148·0-171·7]). However, notable health gains were seen among other leading communicable, maternal, neonatal, and nutritional (CMNN) diseases. Globally between 2010 and 2021, the age-standardised DALY rates for HIV/AIDS decreased by 47·8% (43·3-51·7) and for diarrhoeal diseases decreased by 47·0% (39·9-52·9). Non-communicable diseases contributed 1·73 billion (95% UI 1·54-1·94) DALYs in 2021, with a decrease in age-standardised DALY rates since 2010 of 6·4% (95% UI 3·5-9·5). Between 2010 and 2021, among the 25 leading Level 3 causes, age-standardised DALY rates increased most substantially for anxiety disorders (16·7% [14·0-19·8]), depressive disorders (16·4% [11·9-21·3]), and diabetes (14·0% [10·0-17·4]). Age-standardised DALY rates due to injuries decreased globally by 24·0% (20·7-27·2) between 2010 and 2021, although improvements were not uniform across locations, ages, and sexes. Globally, HALE at birth improved slightly, from 61·3 years (58·6-63·6) in 2010 to 62·2 years (59·4-64·7) in 2021. However, despite this overall increase, HALE decreased by 2·2% (1·6-2·9) between 2019 and 2021. INTERPRETATION Putting the COVID-19 pandemic in the context of a mutually exclusive and collectively exhaustive list of causes of health loss is crucial to understanding its impact and ensuring that health funding and policy address needs at both local and global levels through cost-effective and evidence-based interventions. A global epidemiological transition remains underway. Our findings suggest that prioritising non-communicable disease prevention and treatment policies, as well as strengthening health systems, continues to be crucially important. The progress on reducing the burden of CMNN diseases must not stall; although global trends are improving, the burden of CMNN diseases remains unacceptably high. Evidence-based interventions will help save the lives of young children and mothers and improve the overall health and economic conditions of societies across the world. Governments and multilateral organisations should prioritise pandemic preparedness planning alongside efforts to reduce the burden of diseases and injuries that will strain resources in the coming decades. FUNDING Bill & Melinda Gates Foundation.
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Abdulkader R, Sultana A, Sun J, Sunkersing D, Susanty S, Swain CK, Sykes BL, Szarpak L, Szeto MD, Szócska M, Tabaee Damavandi P, Tabatabaei Malazy O, Tabatabaeizadeh SA, Tabatabai S, Tabb KM, Tabish M, Taborda-Barata LM, Tabuchi T, Tadesse BT, Taheri A, Taheri Abkenar Y, Taheri Soodejani M, Taherkhani A, Taiba J, Tajbakhsh A, Talaat IM, Talukder A, Tamuzi JL, Tan KK, Tang H, Tang HK, Tat NY, Tat VY, Tavakoli Oliaee R, Tavangar SM, Taveira N, Tebeje TM, Tefera YM, Teimoori M, Temsah MH, Temsah RMH, Teramoto M, Tesfaye SH, Thangaraju P, Thankappan KR, Thapa R, Thapar R, Thomas N, Thrift AG, Thum CCC, Tian J, Tichopad A, Ticoalu JHV, Tiruye TY, Tohidast SA, Tonelli M, Touvier M, Tovani-Palone MR, Tram KH, Tran NM, Trico D, Trihandini I, Tromans SJ, Truong VT, Truyen TTTT, Tsermpini EE, Tumurkhuu M, Tung K, Tyrovolas S, Ubah CS, Udoakang AJ, Udoh A, Ulhaq I, Ullah S, Ullah S, Umair M, Umar TP, Umeokonkwo CD, Umesh A, Unim B, Unnikrishnan B, Upadhyay E, Urso D, Vacante M, Vahdani AM, Vaithinathan AG, Valadan Tahbaz S, Valizadeh R, Van den Eynde J, Varavikova E, Varga O, Varma SA, Vart P, Varthya SB, Vasankari TJ, Veerman LJ, Venketasubramanian N, Venugopal D, Verghese NA, Verma M, Verma P, Veroux M, Verras GI, Vervoort D, Vieira RJ, Villafañe JH, Villani L, Villanueva GI, Villeneuve PJ, Violante FS, Visontay R, Vlassov V, Vo B, Vollset SE, Volovat SR, Volovici V, Vongpradith A, Vos T, Vujcic IS, Vukovic R, Wado YD, Wafa HA, Waheed Y, Wamai RG, Wang C, Wang D, Wang F, Wang S, Wang S, Wang Y, Wang YP, Ward P, Watson S, Weaver MR, Weerakoon KG, Weiss DJ, Weldemariam AH, Wells KM, Wen YF, Werdecker A, Westerman R, Wickramasinghe DP, Wickramasinghe ND, Wijeratne T, Wilson S, Wojewodzic MW, Wool EE, Woolf AD, Wu D, Wulandari RD, Xiao H, Xu B, Xu X, Yadav L, Yaghoubi S, Yang L, Yano Y, Yao Y, Ye P, Yesera GE, Yesodharan R, Yesuf SA, Yiğit A, Yiğit V, Yip P, Yon DK, Yonemoto N, You Y, Younis MZ, Yu C, Zadey S, Zadnik V, Zafari N, Zahedi M, Zahid MN, Zahir M, Zakham F, Zaki N, Zakzuk J, Zamagni G, Zaman BA, Zaman SB, Zamora N, Zand R, Zandi M, Zandieh GGZ, Zanghì A, Zare I, Zastrozhin MS, Zeariya MGM, Zeng Y, Zhai C, Zhang C, Zhang H, Zhang H, Zhang Y, Zhang Z, Zhang Z, Zhao H, Zhao Y, Zhao Y, Zheng P, Zhong C, Zhou J, Zhu B, Zhu Z, Ziaeefar P, Zielińska M, Zou Z, Zumla A, Zweck E, Zyoud SH, Lim SS, Murray CJL. Global age-sex-specific mortality, life expectancy, and population estimates in 204 countries and territories and 811 subnational locations, 1950-2021, and the impact of the COVID-19 pandemic: a comprehensive demographic analysis for the Global Burden of Disease Study 2021. Lancet 2024; 403:1989-2056. [PMID: 38484753 DOI: 10.1016/s0140-6736(24)00476-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 12/08/2023] [Accepted: 03/06/2024] [Indexed: 04/13/2024]
Abstract
BACKGROUND Estimates of demographic metrics are crucial to assess levels and trends of population health outcomes. The profound impact of the COVID-19 pandemic on populations worldwide has underscored the need for timely estimates to understand this unprecedented event within the context of long-term population health trends. The Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2021 provides new demographic estimates for 204 countries and territories and 811 additional subnational locations from 1950 to 2021, with a particular emphasis on changes in mortality and life expectancy that occurred during the 2020-21 COVID-19 pandemic period. METHODS 22 223 data sources from vital registration, sample registration, surveys, censuses, and other sources were used to estimate mortality, with a subset of these sources used exclusively to estimate excess mortality due to the COVID-19 pandemic. 2026 data sources were used for population estimation. Additional sources were used to estimate migration; the effects of the HIV epidemic; and demographic discontinuities due to conflicts, famines, natural disasters, and pandemics, which are used as inputs for estimating mortality and population. Spatiotemporal Gaussian process regression (ST-GPR) was used to generate under-5 mortality rates, which synthesised 30 763 location-years of vital registration and sample registration data, 1365 surveys and censuses, and 80 other sources. ST-GPR was also used to estimate adult mortality (between ages 15 and 59 years) based on information from 31 642 location-years of vital registration and sample registration data, 355 surveys and censuses, and 24 other sources. Estimates of child and adult mortality rates were then used to generate life tables with a relational model life table system. For countries with large HIV epidemics, life tables were adjusted using independent estimates of HIV-specific mortality generated via an epidemiological analysis of HIV prevalence surveys, antenatal clinic serosurveillance, and other data sources. Excess mortality due to the COVID-19 pandemic in 2020 and 2021 was determined by subtracting observed all-cause mortality (adjusted for late registration and mortality anomalies) from the mortality expected in the absence of the pandemic. Expected mortality was calculated based on historical trends using an ensemble of models. In location-years where all-cause mortality data were unavailable, we estimated excess mortality rates using a regression model with covariates pertaining to the pandemic. Population size was computed using a Bayesian hierarchical cohort component model. Life expectancy was calculated using age-specific mortality rates and standard demographic methods. Uncertainty intervals (UIs) were calculated for every metric using the 25th and 975th ordered values from a 1000-draw posterior distribution. FINDINGS Global all-cause mortality followed two distinct patterns over the study period: age-standardised mortality rates declined between 1950 and 2019 (a 62·8% [95% UI 60·5-65·1] decline), and increased during the COVID-19 pandemic period (2020-21; 5·1% [0·9-9·6] increase). In contrast with the overall reverse in mortality trends during the pandemic period, child mortality continued to decline, with 4·66 million (3·98-5·50) global deaths in children younger than 5 years in 2021 compared with 5·21 million (4·50-6·01) in 2019. An estimated 131 million (126-137) people died globally from all causes in 2020 and 2021 combined, of which 15·9 million (14·7-17·2) were due to the COVID-19 pandemic (measured by excess mortality, which includes deaths directly due to SARS-CoV-2 infection and those indirectly due to other social, economic, or behavioural changes associated with the pandemic). Excess mortality rates exceeded 150 deaths per 100 000 population during at least one year of the pandemic in 80 countries and territories, whereas 20 nations had a negative excess mortality rate in 2020 or 2021, indicating that all-cause mortality in these countries was lower during the pandemic than expected based on historical trends. Between 1950 and 2021, global life expectancy at birth increased by 22·7 years (20·8-24·8), from 49·0 years (46·7-51·3) to 71·7 years (70·9-72·5). Global life expectancy at birth declined by 1·6 years (1·0-2·2) between 2019 and 2021, reversing historical trends. An increase in life expectancy was only observed in 32 (15·7%) of 204 countries and territories between 2019 and 2021. The global population reached 7·89 billion (7·67-8·13) people in 2021, by which time 56 of 204 countries and territories had peaked and subsequently populations have declined. The largest proportion of population growth between 2020 and 2021 was in sub-Saharan Africa (39·5% [28·4-52·7]) and south Asia (26·3% [9·0-44·7]). From 2000 to 2021, the ratio of the population aged 65 years and older to the population aged younger than 15 years increased in 188 (92·2%) of 204 nations. INTERPRETATION Global adult mortality rates markedly increased during the COVID-19 pandemic in 2020 and 2021, reversing past decreasing trends, while child mortality rates continued to decline, albeit more slowly than in earlier years. Although COVID-19 had a substantial impact on many demographic indicators during the first 2 years of the pandemic, overall global health progress over the 72 years evaluated has been profound, with considerable improvements in mortality and life expectancy. Additionally, we observed a deceleration of global population growth since 2017, despite steady or increasing growth in lower-income countries, combined with a continued global shift of population age structures towards older ages. These demographic changes will likely present future challenges to health systems, economies, and societies. The comprehensive demographic estimates reported here will enable researchers, policy makers, health practitioners, and other key stakeholders to better understand and address the profound changes that have occurred in the global health landscape following the first 2 years of the COVID-19 pandemic, and longer-term trends beyond the pandemic. FUNDING Bill & Melinda Gates Foundation.
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Shakeri A. Comment on: "Comparison of shoulder anterior capsular block and interscalene brachial plexus block for shoulder arthroscopy: a preliminary analysis". Minerva Anestesiol 2024:S0375-9393.24.18124-2. [PMID: 38656088 DOI: 10.23736/s0375-9393.24.18124-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Affiliation(s)
- Alireza Shakeri
- Department of Anesthesia, Shahid Beheshti University of Medical Sciences, Tehran, Iran -
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Mirkheshti A, Raji P, Komlakh K, Salimi S, Shakeri A. The efficacy of ultrasound-guided erector spinae plane block (ESPB) versus freehand ESPB in postoperative pain management after lumbar spinal fusion surgery: a randomized, non-inferiority trial. Eur Spine J 2024; 33:1081-1088. [PMID: 38170270 DOI: 10.1007/s00586-023-08101-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/22/2023] [Accepted: 12/09/2023] [Indexed: 01/05/2024]
Abstract
PURPOSE Spine surgeries have experienced exponential growth over the past 2 decades. These surgeries are often accompanied by long and severe perioperative pain, presenting a significant management challenge. This study aims to assess and compare the efficacy of two techniques for postoperative pain (POP) management in lumbar spine surgeries: ultrasound-guided erector spinae plane block (ESPB) and intraoperative freehand ESPB. METHODS In this prospective randomized non-inferiority trial (Registration Number: IRCT20221107056427N1), adult patients who were candidates for lumbar spinal fusion surgery were randomly divided into two groups: ultrasound-guided ESPB (n = 29) and freehand ESPB (n = 29). The primary outcomes were the total amount of morphine consumed during the first 24 h following the surgery and the numerical rating scale (NRS) pain score at various time points within the first 24 h following the surgery. The secondary outcome was the fentanyl used during surgery. RESULTS Participants in the intraoperative freehand approach had considerably higher total morphine consumption in the first postoperative 24 h. The trend of NRS changes in both the ultrasound-guided ESPB group and the freehand ESPB group during the first 24 h after surgery showed a significant decrease. Still, there was no significant difference between the two groups. However, the first analgesic demand time was significantly shorter in the intraoperative freehand ESPB group compared to the ultrasound-guided approach. CONCLUSION According to our results, the ultrasound-guided approach of ESPB is more effective in POP management and opioid sparing in lumbar spinal fusion surgeries compared to the freehand approach. However, the data from this study are not sufficient to draw robust conclusions, and further randomized controlled trials with larger sample sizes are required to validate our results.
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Affiliation(s)
- Alireza Mirkheshti
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Parisa Raji
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Khalil Komlakh
- Department of Neurosurgery, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sohrab Salimi
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Alireza Shakeri
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
- Department of Anesthesiology, Imam Hossein Hospital, Shahid Madani Street, Tehran, 1617763141, Iran.
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Shakeri A, Memary E. Erector spinae plane block as an anesthesia technique for an emergent thoracotomy; a case report. BMC Anesthesiol 2024; 24:57. [PMID: 38331721 PMCID: PMC10851452 DOI: 10.1186/s12871-024-02431-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 01/26/2024] [Indexed: 02/10/2024] Open
Abstract
BACKGROUND The erector spinae plane block (ESPB) is a novel regional block technique for pain management following thoracic surgeries. However, there are minimal cases in which the technique was used as the main anesthesia technique during surgery. CASE PRESENTATION Here, we report the successful use of ESBP for applying anesthesia in a case during an emergent thoracotomy for performing pericardiotomy and loculated tamponade evacuation. CONCLUSIONS Using ESPB with a higher concentration of local anesthetics, in this case, prepared appropriate anesthesia for performing an emergent thoracotomy while avoiding multiple needle insertions and the risk of further hemodynamic instability.
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Affiliation(s)
- Alireza Shakeri
- Anesthesiology Department, Imam Hosein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Elham Memary
- Anesthesiology Department, Imam Hosein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Mosaffa F, Ghasemi M, Habibi A, Minaei R, Bazgir N, Memary E, Shakeri A. Efficacy Comparison Between Interscalene Block with and Without Superficial Cervical Plexus Block for Anesthesia in Clavicle Surgery. Anesth Pain Med 2024; 14:e142051. [PMID: 38737591 PMCID: PMC11088847 DOI: 10.5812/aapm-142051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 12/27/2023] [Accepted: 12/29/2023] [Indexed: 05/14/2024] Open
Abstract
Background Clavicle fractures account for over one-third of shoulder injuries and up to 3.3% of all fractures in adults. While the majority of these fractures can be managed non-surgically, there are instances where surgical intervention is performed. Regional anesthesia (RA) can be a preferred alternative to general anesthesia (GA) to avoid complications and high costs in this surgery. Moreover, the identification of the most optimal approach for RA remains challenging. Objectives This study aimed to compare the efficacy of interscalene block (ISB) with and without superficial cervical plexus block (SCPB) as an anesthetic technique for clavicular fracture operation. Methods This double-blinded, non-inferiority clinical trial was conducted on 120 patients randomly divided into 2 groups: One receiving ISB and the other receiving ISB with SCPB. The primary outcome was defined as the conversion to GA. Various factors were recorded, including surgery duration, nerve block initiation, analgesics required in the postanesthesia care unit (PACU), and sedation during surgery. Pain was evaluated using the Visual Analog Scale (VAS) in PACU. SPSS version 26 was used for statistical analysis, performing descriptive analysis, Student's t-tests, and Mann-Whitney U tests to compare non-parametric variables between the 2 groups. Statistically significant results had a P value of less than 0.05. Results A total of 120 patients were randomly divided into 2 equal groups, each consisting of 50 males and 10 females. The mean age of intervention and case groups were 37.23 ± 13.30 and 38.43 ± 11.95 years, respectively. After performing statistical tests (Student's t-test and Mann-Whitney U test), there was no significant difference in the initiation time of nerve block, surgery initiation time, surgery duration, the amount of required sedation, VAS scores, and meperidine consumption (P > 0.05). None of the patients in both groups required conversion to GA. Conclusions The primary goal was achieved in all included cases, and no patients required conversion to GA. The efficacy of ISB is the same whether or not it is combined with a SCPB. Interscalene block is an alternative RA approach for clavicle fractures. Thus, ISB alone is as efficient as when used in combination with SCPB.
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Affiliation(s)
- Faramarz Mosaffa
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahshid Ghasemi
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Afsaneh Habibi
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Reza Minaei
- Akhtar Orthopedic Research Center, Shahid Beheshti Medical University, Tehran, Iran
| | - Narges Bazgir
- Hearing Disorders Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Elham Memary
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Alireza Shakeri
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Mirkheshti A, Hashemian M, Abtahi D, Shayegh S, Manafi-Rasi A, Sayadi S, Memary E, Karami N, Rostamian B, Shakeri A. Quadratus Lumborum Block versus Fascia Iliaca Compartment Block for Acetabular Fracture Surgery by Stoppa Method: A Double-Blind, Randomized, Noninferiority Trial. Pain Res Manag 2024; 2024:3720344. [PMID: 38223902 PMCID: PMC10787012 DOI: 10.1155/2024/3720344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 11/25/2023] [Accepted: 12/02/2023] [Indexed: 01/16/2024]
Abstract
Background Acetabular fracture surgeries are frequently accompanied by protracted and severe perioperative pain, and there is no consensus on optimal pain relief management. Aim This study aimed at comparing the analgesic efficacy of fascia iliaca compartment block (FICB) and quadratus lumborum block (QLB) in patients with acetabular fractures undergoing surgery using the Stoppa method. Methods In this double-blind, randomized, noninferiority clinical trial, adult patients undergoing spinal anesthesia for acetabular fracture surgery, in Imam Hossein Hospital, Tehran, Iran (IRCT20191114045435N1), were randomly divided into two groups: FICB (n = 22) and QLB (n = 24). The visual analog scale (VAS) was used to assess the pain intensity at different times for all participants. In addition, the dose of fentanyl required to induce the patient to sit for spinal anesthesia and the pain intensity were evaluated. Moreover, the duration of analgesia and the total amount of morphine consumed in the first 24 h following surgery were evaluated, analyzed, and compared between the two study groups. Results FICB and QLB demonstrated effective comparative postoperative analgesic profiles following acetabular fracture surgery; however, no significant differences in VAS values were observed between the two groups during the study. FICB experienced reduced cumulative fentanyl consumption during spinal anesthetic placement, whereas QLB had a significantly lower total morphine demand in the initial postoperative 24 h period. Conclusion The lateral QLB and FICB can be introduced as effective routes for analgesia in acetabular fracture surgery using the Stoppa method. Clinical Trial Registration. The study was prospectively registered in the clinical trials registry system, on 2021-02-17, with registration number: IRCT20191114045435N1.
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Affiliation(s)
- Alireza Mirkheshti
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Morteza Hashemian
- Department of Anesthesiology and Pain Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Dariush Abtahi
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sara Shayegh
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Alireza Manafi-Rasi
- Department of Orthopedic Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shahram Sayadi
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Elham Memary
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Nazli Karami
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Baharak Rostamian
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Alireza Shakeri
- Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Alam M, Shakeri A, Khorsand A, Nasseri K, Nasseri S. Assessing the impact of aprepitant and ondansetron on postoperative nausea and vomiting in orthognathic surgeries: a randomized controlled trial. BMC Anesthesiol 2023; 23:412. [PMID: 38093201 PMCID: PMC10717277 DOI: 10.1186/s12871-023-02371-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 12/05/2023] [Indexed: 12/17/2023] Open
Abstract
BACKGROUND Postoperative nausea and vomiting (PONV) is a common side effect associated with general anesthesia. Both ondansetron and aprepitant been effectively used to prevent PONV. However, there is a disagreement of opinions regarding the superiority of these two drugs. This study aims to compare the efficacy of aprepitant with ondansetron in preventing PONV following orthognathic surgeries. METHODS In this double-blinded clinical trial, 80 patients scheduled for orthognathic surgery at Imam Hossein Hospital, Tehran, Iran, were randomly assigned to two groups. A standardized anesthesia protocol was used for all patients. The first group received a placebo capsule administered one hour before the surgical procedure along with 4 mg (2 ml) of ondansetron intravenously after anesthesia induction. The second group was given 80 mg aprepitant capsules one hour before the surgery, followed by an injection of 2 ml intravenous distilled water after anesthesia induction. The occurrence and severity of PONV, the amount of rescue medication required, and the complete response of patients assessed within 24 h after the surgery. RESULTS There were no significant differences in demographic data between the two groups. Patients in the aprepitant group had a significantly lower incidence and severity of nausea (2.5% versus 27.5%), vomiting (5% versus 25%), and required fewer rescue medications (7.5% versus 62.5%) compared to the ondansetron group. Additionally, the aprepitant group showed a higher complete response rate (90% versus 67.5%) in the 0-2 and 12-24 postoperative hours. CONCLUSION According to the findings of this study, aprepitant has demonstrated a greater efficacy in preventing PONV following orthognathic surgery, when compared to ondansetron. TRIAL REGISTRATION Iranian Registry of Clinical Trials (IRCT code: IRCT20211205053279N3), date of registration: 16/12/2022.
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Affiliation(s)
- Mostafa Alam
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Alireza Shakeri
- Department of Anesthesiology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ardeshir Khorsand
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Karim Nasseri
- Department of Anesthesiology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Sadaf Nasseri
- Research Institute of Dental Sciences-Shahid Beheshti University of Medical Sciences, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
- Department of Oral and Maxillofacial Medicine, Health Service, Medical University of Kurdistan, Sanandaj, Iran.
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Shakeri A, Abtahi D, Shahmansouri M, Manafi-Rasi A. Prophylactic Fibrinogen Reduces Excessive Bleeding in Total Hip Arthroplasty Surgery: A Randomized Double-blinded Placebo-controlled Trial. Arch Bone Jt Surg 2023; 11:524-530. [PMID: 38736722 PMCID: PMC11088708 DOI: 10.22038/abjs.2023.69727.3274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 06/10/2023] [Indexed: 05/14/2024]
Abstract
Objectives Excessive blood loss is a critical complication of total hip arthroplasty. We intended to determine whether preoperative fibrinogen administration reduces perioperative bleeding and the need for blood transfusion in total hip arthroplasty surgery. Methods In 4 months, 178 patients who underwent total hip arthroplasty were randomly assigned equally to intervention and placebo-control groups in a double-blinded, parallel two-arm randomized controlled trial. Both intravenously, 30 min before the start of the surgery, the intervention group received two grams of fibrinogen concentrate dissolved in 100 ml of distilled water. In contrast, the control group received 100 ml of normal saline solution. The amount of postoperative blood loss served as the main result, and the requirement for blood transfusions served as the secondary outcome. Results In comparison to the placebo, administering fibrinogen concentrate considerably reduced the amount of blood loss (P=0.001) and the requirement for blood transfusions (P=0.004). Patients who got fibrinogen concentrate experienced no side effects. In addition, patients in the fibrinogen group had significantly lower hemoglobin and higher fibrinogen levels in the recovery room and received lesser blood transfusions (P<0.005) than the placebo group. Conclusion In total hip arthroplasty, fibrinogen concentrate lessens postoperative bleeding and the requirement for blood transfusions.
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Affiliation(s)
- Alireza Shakeri
- Department of anesthesiology, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Dariush Abtahi
- Department of anesthesiology, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Marjan Shahmansouri
- Department of anesthesiology, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Alireza Manafi-Rasi
- Department of Orthopedics, School of Medicine, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Salehi H, Shakeri A, Lammertink RG. Thermo-responsive graft copolymer PSf-g-PNIPM: Reducing the structure parameter via morphology control of forward osmosis membrane substrates. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Yassari M, Shakeri A. Nature based forward osmosis membranes: A novel approach for improved anti-fouling properties of thin film composite membranes. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Nematian T, Shakeri A, Salehi Z, Saboury AA, Dalai AK. The effect of 3D structure preparation method on lipase/3DMGO biocatalytic parameters and catalytic performance in transesterification of microalgae bio-oil. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.05.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Yassari M, Shakeri A, Salehi H. ZIF-67 templated thin-film composite forward osmosis membrane: Importance of incorporation method on morphology and performance. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.03.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Joafshan M, Shakeri A, Razavi SR, Salehi H. Gas responsive magnetic nanoparticle as novel draw agent for removal of Rhodamine B via forward osmosis: High water flux and easy regeneration. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.119998] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Yassari M, Shakeri A, Salehi H, Razavi SR. Enhancement in forward osmosis performance of thin-film nanocomposite membrane using tannic acid-functionalized graphene oxide. J Polym Res 2022. [DOI: 10.1007/s10965-022-02894-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Shakeri A, Babaheydari SMM, Salehi H, Razavi SR. Reduction of the Structure Parameter of Forward Osmosis Membranes by Using Sodium Bicarbonate as Pore-Forming Agent. Langmuir 2021; 37:7591-7599. [PMID: 34106713 DOI: 10.1021/acs.langmuir.1c01097] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The forward osmosis (FO) process suffers from unfavorable internal concentration polarization (ICP) of the solute within the support layer of thin-film composite forward osmosis (TFC-FO) membranes. To lower the ICP effect, a support layer with low tortuosity, high porosity, and interconnected pores is necessary. In the present investigation, sodium bicarbonate has been presented as a simple pore-forming agent to decline the ICP within a poly(ethersulfone) substrate. In particular, the porous poly(ethersulfone) support layer was fabricated by embedding sodium bicarbonate into the casting solution to form CO2 gas bubbles in the substrate during phase inversion in an acidic nonsolvent. Experimental results revealed that the separation performance of the TFC-FO membranes significantly improved. The most water-permeable membrane was prepared in the acidic nonsolvent (TFC-SB.3) and it demonstrated a water flux of 26.6 LMH and a reverse salt flux of 3.6 gMH in the FO test. In addition, the TFC-SB.3 membrane showed an 85% increase in water permeability (2.13 LMH/bar) with negligible change in salt rejection (94.3%). Such observations were based on the increase of substrate porosity and the improved connectivity of the finger-like channels through in situ CO2 gas bubbling that alleviate the ICP phenomena. Therefore, the current study presents a simple, scalable method to design a high-performance TFC-FO membrane.
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Affiliation(s)
- Alireza Shakeri
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6619, Tehran 25529, Iran
| | | | - Hasan Salehi
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6619, Tehran 25529, Iran
| | - Seyed Reza Razavi
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6619, Tehran 25529, Iran
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Kisomi AS, Alizadeh T, Shakeri A, Nouri A, Farsadrooh M, Najafi AsliPashaki S. Application of μ-TLC for speciation of inorganic arsenic by laser ablation inductively coupled plasma mass spectrometry. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105443] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Ranjbar Kalahrudi S, Shakeri A, Ghadimi A, Mahdavi H. Selective oxidation of benzene to phenol using functionalized membrane via Fenton-like process. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118230] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Mirkheshti A, Shakeri A, Memary E, Baniasadi M, Zaringhalam J, Tajbakhsh A, Mirzaei M, Lak E. Maternal sciatic nerve administered bupivacaine induces hippocampal cell apoptosis in offspring. BMC Anesthesiol 2020; 20:228. [PMID: 32894054 PMCID: PMC7487602 DOI: 10.1186/s12871-020-01143-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 09/01/2020] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Bupivacaine, an amid-type local anesthetic, is widely used for clinical patients especially in pregnant women. In addition to neurotoxicity effect of bupivacaine, it can cross the placenta, accumulates in this tissue and retained in fetal tissues. Nevertheless, whether bupivacaine can cause neurotoxicity in fetus remains unclear. Hence, this study was design to investigate the effects of maternal bupivacaine use on fetus hippocampal cell apoptosis and the possible related mechanism. METHODS On day 15 of pregnancy, sciatic nerve of pregnant wistar rat (180-200 g) were exposed by lateral incision of the right thigh and 0.2 ml of bupivacaine was injected. After their delivery, we randomly selected one male offspring of every mother. On day 30 after of their birth, the rat's hippocampi were isolated for molecular studies. Western blotting was used to examine the expression of cleaved caspase-3, caspase-8 and p-Akt in fetal hippocampus. RESULTS Our results showed that maternal bupivacaine use caused a significant increment of cleaved caspase-3 and caspase-8 expression in fetal hippocampus compared with the sham group. In addition, maternally administered bupivacaine could significantly decrease hippocampal P.Akt/T.Akt ratio which was concurrent with an increment of cleaved caspase-3 and caspase-8 expression. CONCLUSION Our data suggest that maternal bupivacaine use increases fetal hippocampal cell apoptosis markers such as caspase 8 and cleaved caspase 3, at least in part, via inhibiting the Akt activation.
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Affiliation(s)
- Alireza Mirkheshti
- Department of Anesthesiology, Shahid Beheshti University of Medical Sciences, Tehran, 1985717443, Iran
| | - Alireza Shakeri
- Department of Anesthesiology, Shahid Beheshti University of Medical Sciences, Tehran, 1985717443, Iran
| | - Elham Memary
- Department of Anesthesiology, Shahid Beheshti University of Medical Sciences, Tehran, 1985717443, Iran
| | - Mansoureh Baniasadi
- Department of Physiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Jalal Zaringhalam
- Department of Physiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Ardeshir Tajbakhsh
- Department of Anesthesiology, Shahid Beheshti University of Medical Sciences, Tehran, 1985717443, Iran
| | - Marzieh Mirzaei
- Department of Gynecology, Tehran Azad University, Tehran, Iran
| | - Elena Lak
- Department of Gastroenterology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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22
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Razavi SR, Shakeri A, Mirahmadi Babaheydari SM, Salehi H, G.H. Lammertink R. High-Performance thin film composite forward osmosis membrane on tannic Acid/Fe3+ coated microfiltration substrate. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2020.06.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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23
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Amani M, Shakeri A. Synthesis and Characterization of Water-Based Epoxy-Acrylate/Graphene Oxide Decorated with Fe3O4 Nanoparticles Coatings and Its Enhanced Anticorrosion Properties. POLYM-PLAST TECH MAT 2020. [DOI: 10.1080/25740881.2020.1773500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Mehdi Amani
- Department of Chemistry, Alborz Campus, University of Tehran, Tehran, Iran
| | - Alireza Shakeri
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
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Rabiee N, Bagherzadeh M, Kiani M, Ghadiri AM, Etessamifar F, Jaberizadeh AH, Shakeri A. Biosynthesis of Copper Oxide Nanoparticles with Potential Biomedical Applications. Int J Nanomedicine 2020; 15:3983-3999. [PMID: 32606660 PMCID: PMC7294052 DOI: 10.2147/ijn.s255398] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 05/28/2020] [Indexed: 12/28/2022] Open
Abstract
Introduction In recent years, the use of cost-effective, multifunctional, environmentally friendly and simple prepared nanomaterials/nanoparticles have been emerged considerably. In this manner, different synthesizing methods were reported and optimized, but there is still lack of a comprehensive method with multifunctional properties. Materials and Methods In this study, we aim to synthesis the copper oxide nanoparticles using Achillea millefolium leaf extracts for the first time. Catalytic activity was investigated by in situ azide alkyne cycloaddition click and also A3 coupling reaction, and optimized in terms of temperature, solvent, and time of the reaction. Furthermore, the photocatalytic activity of the synthesized nanoparticles was screened in terms of degradation methylene blue dye. Biological activity of the synthesized nanoparticles was evaluated in terms of antibacterial and anti-fungal assessments against Staphylococcus aureus, M. tuberculosis, E. coli, K. pneumoniae, P. mirabili, C. diphtheriae and S. pyogenes bacteria's and G. albicans, A. flavus, M. canis and G. glabrata fungus. In the next step, the biosynthesized CuO-NPs were screened by MTT and NTU assays. Results Based on our knowledge, this is a comprehensive study on the catalytic and biological activity of copper oxide nanoparticles synthesizing from Achillea millefolium, which presents great and significant results (in both catalytic and biological activities) based on a simple and green procedure. Conclusion Comprehensive biomedical and catalytic investigation of the biosynthesized CuO-NPs showed the mentioned method leads to synthesis of more eco-friendly nanoparticles. The in vitro studies showed promising and considerable results, and due to the great stability of these nanoparticles in a green media, effective biological activity considered as an advantageous.
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Affiliation(s)
- Navid Rabiee
- Department of Chemistry, Sharif University of Technology, Tehran 11155-3516, Iran
| | - Mojtaba Bagherzadeh
- Department of Chemistry, Sharif University of Technology, Tehran 11155-3516, Iran
| | - Mahsa Kiani
- Department of Chemistry, Sharif University of Technology, Tehran 11155-3516, Iran
| | | | - Fatemeh Etessamifar
- Department of Chemistry, Sharif University of Technology, Tehran 11155-3516, Iran
| | | | - Alireza Shakeri
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
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Kisomi AS, Alizadeh T, Shakeri A. μ-Thin-layer chromatography coupled with laser ablation-inductively coupled plasma-mass spectrometry using tin(II)-imprinted polymer nanoparticles as a stationary phase for speciation of tin. Mikrochim Acta 2020; 187:298. [PMID: 32347371 DOI: 10.1007/s00604-020-04260-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 04/03/2020] [Indexed: 12/29/2022]
Abstract
A unique and novel μ-thin-layer chromatography method based on Sn(II) ion-imprinted polymer (Sn-IIP) for speciation of tin ion species in water and plasma samples is introduced for the first time. For this purpose, N-allylthiourea (NATU) and ethylene glycol dimethacrylate (EGDMA) were copolymerized in the presence of Sn(II). The obtained polymer particles were identified using multiple techniques like BET, FT-IR, XRD, and FESEM. The effects of different variables such as pH of the solution, mobile phase composition, and IIP per CaSO4 mass ratio on the separation efficiency were also evaluated. After completion of the separation process on the plate, its surface was scanned by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Under the established optimal condition, the detection limit, relative standard deviation (RSD) of responses, and linear dynamic range (LDR) of the method were obtained as 0.3 μg L-1, 3.5%, and 0.8-900 μg L-1 for Sn(II) and 0.4 μg L-1, 4%, and 1-740 μg L-1 for Sn(IV) assay, respectively. The developed method was finally applied to the speciation of tin in various water and plasma samples. Graphical abstract Schematic representation of μ-thin-layer chromatography method based on tin(II) ion-imprinted polymer (Sn-IIP) for speciation of tin ion species in water and plasma samples and scanned separated casts by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS).
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Affiliation(s)
| | - Taher Alizadeh
- Department of Analytical Chemistry, Faculty of Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran.
| | - Alireza Shakeri
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6619, Tehran, Iran
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Abstract
Background:
Dittrichia graveolens (L.) is a strongly aromatic plant distributed in Mediterranean
regions. This research concerns the optimization of the Total Phenolic Content (TPC) and the Total
Tannin Content (TTC) of Dittrichia graveolens (L.) extracts using Response Surface Methodology for
Ultrasound Assisted Extraction (UAE) and Microwave Assisted Extraction (MAE). Central Composite
Design (CCD) was used to evaluate the effect of the solvent concentration and the extraction time, in
different methods on TTC and TPC. The antioxidant activities and antibacterial activities were
evaluated.
Methods:
The plant extracts were prepared using maceration, microwave and ultrasound assisted
extraction. TPC and TTC were measured using Folin-Ciocalteu method. The antioxidant activities
were studied using DPPH reagent and disc diffusion method was used to study the antibacterial
activities.
Results:
This study showed the optimum condition for UAE was 49.96% methanol concentration and
11.2 min sonication, while for MAE was 55.44% methanol concentration and 2.26 min microwave extraction.
It also indicated that MAE was the most effective method in comparison to UAE and maceration.
The antioxidant activities of MAE extract (IC50=7.7mg/mL) were more than UAE extract
(IC50=21.5mg/mL) and maceration (IC50=32.3mg/mL).
Conclusion:
As a conclusion, it was indicated that MAE was the most effective method. The higher
total phenolic content caused higher antioxidant activities as MAE extract had the highest antioxidant
activities. The antibacterial test showed the great potential of this plant as an antibacterial compound
resource against different bacteria.
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Affiliation(s)
- Mahsa Souri
- School of Chemistry, Collage of Science, University of Tehran, Tehran, Iran
| | - Alireza Shakeri
- School of Chemistry, Collage of Science, University of Tehran, Tehran, Iran
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Nematian T, Shakeri A, Salehi Z, Saboury AA. Lipase immobilized on functionalized superparamagnetic few-layer graphene oxide as an efficient nanobiocatalyst for biodiesel production from Chlorella vulgaris bio-oil. Biotechnol Biofuels 2020; 13:57. [PMID: 32206090 PMCID: PMC7082915 DOI: 10.1186/s13068-020-01688-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 02/25/2020] [Indexed: 05/05/2023]
Abstract
BACKGROUND Microalgae, due to its well-recognized advantages have gained renewed interest as potentially good feedstock for biodiesel. Production of fatty acid methyl esters (FAMEs) as a type of biodiesel was carried out from Chlorella vulgaris bio-oil. Biodiesel was produced in the presence of nano-biocatalysts composed of immobilized lipase on functionalized superparamagnetic few-layer graphene oxide via a transesterification reaction. A hybrid of few-layer graphene oxide and Fe3O4 (MGO) was prepared and characterized. The MGO was functionalized with 3-aminopropyl triethoxysilane (MGO-AP) as well as with a couple of AP and glutaraldehyde (MGO-AP-GA). The Rhizopus oryzae lipase (ROL) was immobilized on MGO and MGO-AP using electrostatic interactions as well as on MGO-AP-GA using covalent bonding. The supports, MGO, MGO-AP, and MGO-AP-GA, as well as nano-biocatalyst, ROL/MGO, ROL/MGO-AP, and ROL/MGO-AP-GA, were characterized using FESEM, VSM, FTIR, and XRD. The few-layer graphene oxide was characterized using AFM and the surface charge of supports was evaluated with the zeta potential technique. The nano-biocatalysts assay was performed with an evaluation of kinetic parameters, loading capacity, relative activity, time-course thermal stability, and storage stability. Biodiesel production was carried out in the presence of nano-biocatalysts and their reusability was evaluated in 5 cycles of transesterification reaction. RESULTS The AFM analysis confirmed the few-layer structure of graphene oxide and VSM also confirmed that all supports were superparamagnetic. The maximum loading of ROL (70.2%) was related to MGO-AP-GA. The highest biodiesel conversion of 71.19% achieved in the presence of ROL/MGO-AP-GA. Furthermore, this nano-biocatalyst could maintain 58.77% of its catalytic performance after 5 cycles of the transesterification reaction and was the best catalyst in the case of reusability. CONCLUSIONS In this study, the synthesized nano-biocatalyst based on bare and functionalized magnetic graphene oxide was applied and optimized in the process of converting microalgae bio-oil to biodiesel for the first time and compared with bare lipase immobilized on magnetic nanoparticles. Results showed that the loading capacity, kinetic parameters, thermal stability, and storage stability improved by the functionalization of MGO. The biocatalysts, which were prepared via covalent bonding immobilization of enzyme generally, showed better characteristics.
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Affiliation(s)
- Tahereh Nematian
- Department of Applied Chemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Alireza Shakeri
- Department of Applied Chemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Zeinab Salehi
- Department of Biotechnology Engineering, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
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Rastgar M, Shakeri A, Karkooti A, Asad A, Razavi R, Sadrzadeh M. Removal of trace organic contaminants by melamine-tuned highly cross-linked polyamide TFC membranes. Chemosphere 2020; 238:124691. [PMID: 31524626 DOI: 10.1016/j.chemosphere.2019.124691] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 08/22/2019] [Accepted: 08/26/2019] [Indexed: 06/10/2023]
Abstract
In recent years, forward osmosis (FO) has represented numerous potential applications in safe water production. In this study, we improved the performance of FO thin film composite (TFC) membranes for the removal of trace organic compounds (TOrCs) by tuning the chemistry of its top active layer. The TFC membranes were synthesized by interfacial polymerization (IP) reaction between amine-containing monomers, e.g., meta-phenylene diamine (MPD) or para-phenylenediamine (PPD), and an acid chloride monomer, e.g., trimesoyl chloride (TMC). Owing to three free amine functionals over main core, melamine was used in the amine monomers solution to increase cross-linking among polyamide chains. Chemical and morphological characterization of the prepared membranes confirmed that melamine was successfully incorporated into the chemical structure of the top PA layer. Two agricultural toxic materials (atrazine and diazinon) were used to investigate the capability of the newly fabricated membranes in the removal of TOrCs. The obtained results showed that melamine-improved FO membranes provided higher atrazine and diazinon rejections in two different FO membrane configurations, including active layer facing feed solution (ALF) and active layer facing draw solution (ALD). The highest rejections of both diazinon (99.4%) and atrazine (97.3%) were achieved when the melamine modified MPD-based membrane served in ALF mode with 2 M NaCl as a draw solution.
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Affiliation(s)
- Masoud Rastgar
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6619, Tehran, Iran; Department of Mechanical Engineering, 10-367, Donadeo Innovation Center for Engineering, Advanced Water Research Lab (AWRL), University of Alberta, Edmonton, AB, Canada
| | - Alireza Shakeri
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6619, Tehran, Iran.
| | - Amin Karkooti
- Department of Mechanical Engineering, 10-367, Donadeo Innovation Center for Engineering, Advanced Water Research Lab (AWRL), University of Alberta, Edmonton, AB, Canada
| | - Asad Asad
- Department of Mechanical Engineering, 10-367, Donadeo Innovation Center for Engineering, Advanced Water Research Lab (AWRL), University of Alberta, Edmonton, AB, Canada
| | - Reza Razavi
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6619, Tehran, Iran
| | - Mohtada Sadrzadeh
- Department of Mechanical Engineering, 10-367, Donadeo Innovation Center for Engineering, Advanced Water Research Lab (AWRL), University of Alberta, Edmonton, AB, Canada.
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Sabaghi M, Maghsoudlou Y, Kashiri M, Shakeri A. Evaluation of physicomechanical and release properties composite polymers containing catechin natural antioxidant. FSCT 2020. [DOI: 10.29252/fsct.16.96.91] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Hosseini H, Shakeri A, Rezaei M, Dashti Barmaki M, Rastegari Mehr M. Water chemistry and water quality pollution indices of heavy metals: a case study of Chahnimeh Water Reservoirs, Southeast of Iran. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s42108-019-00051-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Shakeri A, Salehi H, Razavi SR, Mirahmadi Babaheydari SM. Blue lemon@quaternary graphene oxide open frameworks: As a novel nanostructure for performance enhancement of thin film nanocomposite forward osmosis membrane. Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2019.06.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Shahabi S, Hamidi S, Ghasemi JB, Norouzi P, Shakeri A. Synthesis, experimental, quantum chemical and molecular dynamics study of carbon steel corrosion inhibition effect of two Schiff bases in HCl solution. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.04.137] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Zolghadr M, Shakeri A, Zohuriaan‐Mehr MJ, Salimi A. Self‐healing semi‐IPN materials from epoxy resin by solvent‐free furan–maleimide Diels–Alder polymerization. J Appl Polym Sci 2019. [DOI: 10.1002/app.48015] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Mohsen Zolghadr
- School of ChemistryUniversity of Tehran, Alborz Campus P.O. Box 14155‐6619 Tehran Iran
| | - Alireza Shakeri
- School of Chemistry, College of ScienceUniversity of Tehran P.O. Box 14155‐6619 Tehran Iran
| | - Mohammad Jalal Zohuriaan‐Mehr
- Biobased Monomers and Polymers Division (BIOBASED Division)Iran Polymer and Petrochemical Institute (IPPI) P.O. Box 14965‐115 Tehran Iran
| | - Ali Salimi
- Adhesive and Resin DepartmentIran Polymer and Petrochemical Institute (IPPI) P.O. Box 14965‐115 Tehran Iran
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Ebrahimi S, Shakeri A, Alizadeh T. Thermal Decomposition of Ammonium Perchlorate in the Presence of Cobalt Hydroxyl@Nano-Porous Polyaniline. J Inorg Organomet Polym Mater 2019. [DOI: 10.1007/s10904-019-01133-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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35
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Yadollahpour A, Rostami R, Kazemi R, Shakeri A. Prefrontal alpha Asymmetry index predicts response to repetitive transcranial magnetic stimulation. Brain Stimul 2019. [DOI: 10.1016/j.brs.2018.12.236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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36
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Shakeri A, Darbari S, Moravvej-Farshi MK. Designing a tunable acoustic resonator based on defect modes, stimulated by selectively biased PZT rods in a 2D phononic crystal. Ultrasonics 2019; 92:8-12. [PMID: 30216782 DOI: 10.1016/j.ultras.2018.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 09/01/2018] [Accepted: 09/04/2018] [Indexed: 06/08/2023]
Abstract
Reconfigurable phononic crystals (PnCs) and related devices are highly attractive because of their flexibility for different applications. We present the design procedure for a tunable acoustic resonator based on a 2D PnC, consisting of a periodic array of piezoelectric rods of radii 175 μm as inclusions arranged in air background. A single point defect devised by a rod of radius 161 μm, replacing one of the inclusions, plays the role of the acoustic resonator, leading to a defect frequency in the phononic band gap (fd ≈ 432 kHz). Applying a ∼1% strain to the defect rod, via an external voltage, tunes the defect resonant frequency within the phononic band gap. It is shown that the maximum tunability and the frequency shift depends on the defect size, and is achieved about Δfd = 440 Hz for the defect with the expense of descending quality factor. Considering the pattern of the localized pressure field, we introduce a multi-defect structure with five symmetric defect rods, corresponding to the maxima of field distribution. It is shown that maximum frequency shift of the dominant defect frequency is achieved about Δfd = 1.14 kHz for defect radius of 161 μm, when all five defect rods are strained. The proposed tunable filter based on multi-defect structure results in an enhancement of about 2.6 times in the maximum frequency shift, in comparison with the single defect structure, and introduces a promising approach for realizing tunable acoustic devices.
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Affiliation(s)
- A Shakeri
- Nano Plasmophotonic Research Group, Faculty of Electrical and Computer Engineering, Tarbiat Modares University, P.O. Box 14115-146, Tehran 1411713116, Iran
| | - S Darbari
- Nano Plasmophotonic Research Group, Faculty of Electrical and Computer Engineering, Tarbiat Modares University, P.O. Box 14115-146, Tehran 1411713116, Iran.
| | - M K Moravvej-Farshi
- Nano Plasmophotonic Research Group, Faculty of Electrical and Computer Engineering, Tarbiat Modares University, P.O. Box 14115-146, Tehran 1411713116, Iran
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Shakeri A, Salehi H, Ghorbani F, Amini M, Naslhajian H. Polyoxometalate based thin film nanocomposite forward osmosis membrane: Superhydrophilic, anti-fouling, and high water permeable. J Colloid Interface Sci 2019; 536:328-338. [DOI: 10.1016/j.jcis.2018.10.069] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 10/22/2018] [Accepted: 10/22/2018] [Indexed: 01/06/2023]
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38
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Salehi H, Shakeri A, Naslhajian H, Amini M. High-flux thin film nanocomposite forward osmosis membrane incorporated with blue lemon polyoxometalate based open-framework. J Polym Res 2019. [DOI: 10.1007/s10965-019-1713-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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39
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Keshavarzi S, Babaei A, Goudarzi A, Shakeri A. ZnO nanoparticles as chain elasticity reducer and structural elasticity enhancer: Correlating the degradating role and localization of ZnO with the morphological and mechanical properties of PLA/PP/ZnO nanocomposite. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4542] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sahar Keshavarzi
- Department of Polymer Engineering, Faculty of Engineering; Golestan University; PO Box 4913815759 Gorgan Iran
| | - Amir Babaei
- Department of Polymer Engineering, Faculty of Engineering; Golestan University; PO Box 4913815759 Gorgan Iran
| | - Alireza Goudarzi
- Department of Polymer Engineering, Faculty of Engineering; Golestan University; PO Box 4913815759 Gorgan Iran
| | - Alireza Shakeri
- Department of chemistry, Faculty of Chemistry; University of Tehran; Tehran Iran
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40
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Rastgar M, Shakeri A, Salehi H. Study of polyamide thin film characteristics impact on permeability/selectivity performance and fouling behavior of forward osmosis membrane. Environ Sci Pollut Res Int 2019; 26:1181-1191. [PMID: 28871353 DOI: 10.1007/s11356-017-0043-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Accepted: 08/25/2017] [Indexed: 06/07/2023]
Abstract
In recent years, forward osmosis (FO) has received considerable attention due to its huge potentials in water desalination. The thin film composite (TFC) membrane used in the FO desalination consists of a bottom support layer covered by an active layer on top. Polyamide (PA) is commonly employed as an active layer forming via interfacial polymerization between m-phenylenediamine (MPD) and trimesoyl chloride (TMC) monomers. In this study, the effects that the MPD and TMC concentrations could have on the performance and anti-fouling behavior of the obtained FO membrane have been investigated. Results showed that there is a trade-off relationship between the water flux and salt rejection, which by increasing MPD concentration, the water flux was reducedو while the salt rejection was enhanced. Also, by increasing the TMC concentration, an opposite trend was observed. Using 0.20 wt.% of TMC monomer, the highest water fluxes of 21.6 LMH and 29.3 LMH were achieved in two different membrane configurations. Furthermore, higher TMC concentration caused better anti-fouling property, when PA active layer of the membrane was in a high fouling potential environment.
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Affiliation(s)
- Masoud Rastgar
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6619, Tehran, Iran
| | - Alireza Shakeri
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6619, Tehran, Iran.
| | - Hasan Salehi
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6619, Tehran, Iran
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41
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Rastgar M, Bozorg A, Shakeri A, Sadrzadeh M. Substantially improved antifouling properties in electro-oxidative graphene laminate forward osmosis membrane. Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2018.11.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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42
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Souri M, Hoseinpour V, Ghaemi N, Shakeri A. Procedure optimization for green synthesis of manganese dioxide nanoparticles by Yucca gloriosa leaf extract. Int Nano Lett 2018. [DOI: 10.1007/s40089-018-0257-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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43
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Abbasi A, Shakeri A. Effect of the flame-retardant 3-hydroxyphenylphosphinyl-propanoic acid on the mechanical, thermal, and flammability properties of poly(ethylene terephthalate) nanofiber mats. HIGH PERFORM POLYM 2018. [DOI: 10.1177/0954008318805530] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The structure, thermal stability, and mechanical properties of electrospun nanofiber mats obtained from poly(ethylene terephthalate) (PET) solutions in trifluoroacetic acid/dichloromethane were evaluated. The electrospun PET nanofibers were characterized by means of attenuated total reflection Fourier transform infrared spectroscopy, scanning electron microscopy, differential scanning calorimetry, thermogravimetric analysis, limiting oxygen index, and tensile testing. PET-3-hydroxyphenylphosphinyl-propanoic acid (HPP) copolymer was used as the flame-retardant (FR) agent to improve the thermal stability and flammability of the nanofiber mats. HPP is a commercial FR for polyesters which was studied from the viewpoint of chemical reactivity and reaction mechanism. To enhance the tensile strength of the nanofiber mats, the nanofibers were collected on high-speed rotating drum. The results showed that the nanofibers were oriented, and their strength was enhanced by increasing the velocity of the collector. The average diameter of electrospun nanofibers was in the range of 110–240 nm, decreasing with the increasing drum speed. Also the mean pore size of the mats decreased significantly with increasing orientation of the nanofibers. The results showed that HPP improved the flame retardancy of PET.
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Affiliation(s)
- Atiyeh Abbasi
- Department of Chemistry, School of Sciences, Alborz Campus, University of Tehran, Tehran, Iran
| | - Alireza Shakeri
- Department of Chemistry, School of Sciences, University of Tehran, Tehran, Iran
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44
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Ebrahimi S, Shakeri A, Alizadeh T. Synthesis of Nano-Porous Polyaniline and Investigation its Catalytic Effect on the Thermal Decomposition of Ammonium Perchlorate. ChemistrySelect 2018. [DOI: 10.1002/slct.201802133] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sajjad Ebrahimi
- PhD candidate; School of Chemistry; College of Science; University of Tehran, Tehran; Iran
| | - Alireza Shakeri
- School of Chemistry; College of Science; University of Tehran, Tehran; Iran
| | - Taher Alizadeh
- School of Chemistry; College of Science; University of Tehran, Tehran; Iran
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45
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Ghanbari A, Tabarsa T, Ashori A, Shakeri A, Mashkour M. Thermoplastic starch foamed composites reinforced with cellulose nanofibers: Thermal and mechanical properties. Carbohydr Polym 2018; 197:305-311. [DOI: 10.1016/j.carbpol.2018.06.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 05/18/2018] [Accepted: 06/04/2018] [Indexed: 02/05/2023]
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46
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Kazemnejadi M, Nikookar M, Mohammadi M, Shakeri A, Esmaeilpour M. Melamine-Schiff base/manganese complex with denritic structure: An efficient catalyst for oxidation of alcohols and one-pot synthesis of nitriles. J Colloid Interface Sci 2018; 527:298-314. [DOI: 10.1016/j.jcis.2018.05.045] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Revised: 05/16/2018] [Accepted: 05/16/2018] [Indexed: 12/18/2022]
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Souri M, Hoseinpour V, Shakeri A, Ghaemi N. Optimisation of green synthesis of MnO nanoparticles via utilising response surface methodology. IET Nanobiotechnol 2018; 12:822-827. [PMID: 30104457 PMCID: PMC8676278 DOI: 10.1049/iet-nbt.2017.0145] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 02/19/2018] [Accepted: 03/04/2018] [Indexed: 07/30/2023] Open
Abstract
This study concerns the optimisation of green synthesis of manganese oxide nanoparticles (MnO NPs) with Dittrichia graveolens (L.) extract via response surface methodology (RSM). Central composite design was used to evaluate the effect of pH, time, and the extract to the metal ratio on the synthesised nanoparticles (NPs). Nine runs were designed to investigate the effect of each parameter while NPs were synthesised under different conditions. Considering the p-values (p-value < 0.05), it is indicated that the extract to the metal ratio was the most effective parameter. The synthesised NPs were characterised using UV-vis. Synthesis of the NPs by polyphenolic compounds of green reducing agent and their stabilisation by curcumin was confirmed by Fourier transform infrared spectra and the surface morphology of the spherical MnO NPs was studied by field-emission scanning electron microscopy and transmission electron microscope techniques. The present researchers claimed the optimal condition as follows: time = 56.7 min, pH = 7.2, and the extract to the metal ratio = 87.9 v/v. MnO NPs at optimum condition were then employed for degradation of industrial dyes and they showed high dye degradation activity against Rhodamine B and light green dye. The average size of the synthesised MnO NPs at optimal condition was claimed to be nearly 38 nm.
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Affiliation(s)
- Mahsa Souri
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Vahid Hoseinpour
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Alireza Shakeri
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran.
| | - Nasser Ghaemi
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
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48
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Naderizadeh S, Shakeri A, Mahdavi H, Nikfarjam N, Taheri Qazvini N. Hybrid Nanocomposite Films of Starch, Poly(vinyl alcohol) (PVA), Starch Nanocrystals (SNCs), and Montmorillonite (Na-MMT): Structure-Properties Relationship. STARCH-STARKE 2018. [DOI: 10.1002/star.201800027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sara Naderizadeh
- Polymer Division; School of Chemistry; College of Science; University of Tehran; PO Box 14155-6455 Tehran Iran
| | - Alireza Shakeri
- Polymer Division; School of Chemistry; College of Science; University of Tehran; PO Box 14155-6455 Tehran Iran
| | - Hossein Mahdavi
- Polymer Division; School of Chemistry; College of Science; University of Tehran; PO Box 14155-6455 Tehran Iran
| | - Nasser Nikfarjam
- Department of Chemistry; Institute for Advanced Studies in Basic Sciences (IASBS); 45137-66731 Zanjan Iran
| | - Nader Taheri Qazvini
- Polymer Division; School of Chemistry; College of Science; University of Tehran; PO Box 14155-6455 Tehran Iran
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49
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Kazemnejadi M, Shakeri A, Nikookar M, Shademani R, Mohammadi M. Selective and metal-free epoxidation of terminal alkenes by heterogeneous polydioxirane in mild conditions. R Soc Open Sci 2018; 5:171541. [PMID: 29892358 PMCID: PMC5990723 DOI: 10.1098/rsos.171541] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 03/21/2018] [Indexed: 06/08/2023]
Abstract
Polydioxirane (PDOX) was prepared by the treatment of polysalicylaldehyde with Oxone and was found as a selective, highly efficient and heterogeneous reagent for epoxidation of alkenes which can be successfully isolated. This work also introduced a simpler, safer and milder way for epoxidation of alkenes with dioxirane groups than before. PDOX can be simply recovered from the reaction mixture by plain filtration and reused for eight runs without significant reactivity loss.
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Affiliation(s)
- M. Kazemnejadi
- Department of Chemistry, College of Sciences, Golestan University, Gorgan, Iran
| | - A. Shakeri
- Faculty of Chemistry, University College of Science, University of Tehran, Tehran, Iran
| | - M. Nikookar
- Department of Chemistry, College of Sciences, Golestan University, Gorgan, Iran
| | - R. Shademani
- Department of Marine Technology, Amirkabir University of Technology, Tehran, Iran
| | - M. Mohammadi
- Department of Chemistry, College of Sciences, Golestan University, Gorgan, Iran
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50
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Shakeri A, Mazaheri K. Integrated Procedure, Using Differential Evolution Optimization of Rate Parameters, for Design of Small and Accurate Multistep Global Chemical Mechanisms. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00144] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alireza Shakeri
- Center of Excellence of Aerospace Systems, Sharif University of Technology, Azadi Avenue, Tehran, Iran
| | - Karim Mazaheri
- Center of Excellence of Aerospace Systems, Sharif University of Technology, Azadi Avenue, Tehran, Iran
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