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( Alireza Naderi ),( Erick P. De Oliveira ),( Tim N. Ziegenfuss ),( Mark E. T. Willems ) 한국운동영양학회 2016 Physical Activity and Nutrition (Phys Act Nutr) Vol.20 No.4
[Purpose] The aim of the present narrative review was to consider the evidence on the timing, optimal dose and intake duration of the main dietary supplements in sports nutrition, i.e. β-alanine, nitrate, caffeine, creatine, sodium bicarbonate, carbohydrate and protein. [Methods] This review article focuses on timing, optimal dose and intake duration of main dietary supplements in sports nutrition. [Results] This paper reviewed the evidence to determine the optimal time, efficacy doses and intake duration for sports supplements verified by scientific evidence that report a performance enhancing effect in both situation of laboratory and training settings. [Conclusion] Consumption of the supplements are usually suggested into 5 specific times, such as pre-exercise (nitrate, caffeine, sodium bicarbonate, carbohydrate and protein), during exercise (carbohydrate), post-exercise (creatine, carbohydrate, protein), meal time (β-alanine, creatine, sodium bicarbonate, nitrate, carbohydrate and protein), and before sleep (protein). In addition, the recommended dosing protocol for the supplements nitrate and β-alanine are fixed amounts irrespective of body weight, while dosing protocol for sodium bicarbonate, caffeine and creatine supplements are related to corrected body weight (mg/kg bw). Also, intake duration is suggested for creatine and β-alanine, being effective in chronic daily time < 2 weeks while caffeine, sodium bicarbonate are effective in acute daily time (1-3 hours). Plus, ingestion of nitrate supplement is required in both chronic daily time < 28 days and acute daily time (2- 2.5 h) prior exercise.
Adsorption ability of oxidized multiwalled carbon nanotubes towards aqueous Ce(III) and Sm(III)
Fattaneh Naderi Behdani,Alireza Talebizadeh Rafsanjani,Meisam Torab-Mostaedi,Seyed Mohammad Amin Koochaki Mohammadpour 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.2
The aim of the present work was to investigate the adsorption of Ce(III) and Sm(III) onto multiwalled carbon nanotubes (MWCNTs) oxidized with concentrate nitric acid. The effects of solution pH, adsorbent dosage, and contact time were studied by batch technique. Langmuir, Freundlich and D-R isotherms were used to describe the adsorption behavior of Ce(III) and Sm(III) by oxidized MWCNTs, and the experimental results fitted Freundlich model well. The maximum uptake capacities (qm) calculated by applying the Langmuir equation for samarium and cerium ions were found to be 89.28 and 92.59 (mg/g), respectively. A comparison of the kinetic models and the overall experimental data was best fitted by the pseudo second-order kinetic model. The calculated thermodynamic parameters (ΔGo, ΔHo, and ΔSo) showed that the adsorption for Ce(III) and Sm(III) is feasible, spontaneous and exothermic at 30-60 oC. Moreover, more than 70% of Ce(III) and Sm(III) adsorbed onto Oxidized MWCNTs could be desorbed with HNO3.
Mehrdad Naderi,Alireza Arabpour,Tsung-I Lin,Ahad Jamalizadeh 한국통계학회 2017 Journal of the Korean Statistical Society Vol.46 No.3
This paper presents a new extension of nonlinear regression models constructed by assuming the normal mean–variance mixture of Birnbaum–Saunders distribution for the unobserved error terms. A computationally analytical EM-type algorithm is developed for computing maximum likelihood estimates. The observed information matrix is derived for obtaining the asymptotic standard errors of parameter estimates. The practical utility of the methodology is illustrated through both simulated and real data sets.
SEMI-ASYMPTOTIC NON-EXPANSIVE ACTIONS OF SEMI-TOPOLOGICAL SEMIGROUPS
Amini, Massoud,Medghalchi, Alireza,Naderi, Fouad Korean Mathematical Society 2016 대한수학회보 Vol.53 No.1
In this paper we extend Takahashi's fixed point theorem on discrete semigroups to general semi-topological semigroups. Next we define the semi-asymptotic non-expansive action of semi-topological semi-groups to give a partial affirmative answer to an open problem raised by A.T-M. Lau.
S. Rasul Eftekhari,S. Alireza Davari,Peyman Naderi,Cristian Garcia,Jose Rodriguez 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
Across the different variety of loss decreasing methods, the loss-model-based methods (LMM) show a fast response and a low torque pulsation. Despite all the mentioned advantages, the approach needs the precise loss model and the knowledge of the motor parameters. Furthermore, the application of the model-based method is direct torque, and flux control is more complicated because the magnetic coefficients of the motor should accurately identify. In this paper, To solve the LMM’s issues, a new model based approach has presented. The inaccuracy problem has fulfilled by dividing the homogenous parameters by each other. Via using this technique, the need for magnetic coefficient identification and the effect of inaccurate parameters have dwindled. Coupled with this, the requirement for computation of iron core loss coefficients have omitted by replacing of iron core loss resistance, which by this deed, in a manner, the estimation precision of iron core loss will enhance. At last, the proposed method had verified by simulation and the results are presented in table format, withal, the parameters of the simulated motor have identified by analyzing an induction motor (IM) in ANSYS Maxwell.
Nafiseh Tavakolpoor Saleh,Alireza Naderi Sohi,Elaheh Esmaeili,Somayeh Karami,Fatemeh Soleimanifar,Nikoo Nasoohi 한국생물공학회 2019 Biotechnology and Bioprocess Engineering Vol.24 No.6
Due to number of reasons such as ease of isolation and their broad differentiation capability, adult human mesenchymal stem cells (MSCs) are widely considered as of the most promising cells for regenerative medicine and tissue engineering. Nevertheless quick decrease in expression of transcription factors associated with stemness and self-renewal during ex vivo expansion of MSCs is an impediment against their therapeutic applications. Since the influence of extra cellular matrix (ECM) proteins on the fate of stem cells is well documented, the culture of MSCs on ECM-derived synthetic biomolecules is worth investigating. In the present study, a lamininderived peptide, YIGSR was covalently immobilized on the chitosan film surface using carbodiimide chemistry and confirmed by fluorometry. The results obtained from surface characterization by atomic force microscopy (AFM) and contact angle measurement, showed no significant difference in topological features and hydrophilicity after peptide immobilization. Employment of these surfaces for culture of human adipose-derived mesenchymal stem cells demonstrated that the immobilized YIGSR peptide has a favorable effect on adhesion and maintaining viability of the MSCs as well as on the expression of stemness markers (Nanog, Oct-4, and Sox-2) in these cells.
Almasi Ali,Reshadat Sohyla,Zangeneh Alireza,Khezeli Mehdi,Teimouri Raziyeh,Rahimi Naderi Samira,Saeidi Shahram 대한소아청소년과학회 2021 Clinical and Experimental Pediatrics (CEP) Vol.64 No.12
Background: Over the past few decades, various goals have been defined to reduce the mortality of children caused by acute lower respiratory infections (ALRIs) worldwide. However, few spatial studies to date have reported on ALRI deaths.Purpose: We aimed to assess the spatial modeling of mortality from ALRI in children under 5 years of age during 2000–2017 using a global data.Methods: The data on the mortality of children under 5 years old caused by ALRI were initially obtained from the official website of the World Health Organization. The income status of their home countries was also gathered from the Country Income Groups (World Bank Classification) website and divided into 5 categories. After that, in the ArcGIS 10.6 environment, a database was created and the statistical tests and related maps were extracted. The Global Moran’s I statistic, Getis-Ord Gi statistic, and geographically weighted regression were used for the analyses. In this study, higher z scores indicated the hot spots, while lower z scores indicated the cold spots.Results: In 2000–2017, child mortality showed a downward trend from 17.6 per 100,000 children to 8.1 and had a clustered pattern. Hot spots were concentrated in Asia in 2000 but shifted toward African countries by 2017. A cold spot that formed in Europe in 2007 showed an ascending trend by 2017. Based on the results of geographically weighted regression test, the regions identified as the hot spots of mortality from ALRI in children under 5 years old were among the middle-income countries (R<sup>2</sup>=0.01, adjusted R<sup>2</sup>=8.77).Conclusion: While the total number of child deaths in 2000– 2017 has decreased, the number of hot spots has increased among countries. This study also concluded that, during the study period, Central and Western Africa countries became the main new hot spots of deaths from ALRI.
( Sajjad Rezaei ),( Hamid Agha-alinejad ),( Mahdieh Molanouri Shamsi ),( Mahvash Jafari ),( Fabricio Azevedo Voltarelli ),( Alireza Naderi ),( Conrad Earnest ) 한국운동영양학회 2017 Physical Activity and Nutrition (Phys Act Nutr) Vol.21 No.1
[Purpose] We aimed to examine the effect of running speed on metabolic responses associated with maximal lactate steady state (MLSS) in rats during forced running wheel (FRW) exercise. [Methods] Forty male adult Wistar rats were divided into seven groups. The blood lactate threshold and peak running speed were determined for an incremental power test group. Five groups participated in constant power tests at intensities 10, 13, 14.5, 16, and 17.5 m/min to determine MLSS and a non-exercise group was chosen as the control. Animals were euthanized immediately after constant power tests and their corticosterone, non-esterified fatty acid (NEFA), blood glucose, and creatine kinase (CK) levels analyzed. The differences among groups were identified by one-way analysis of variance (p < 0.05). [Results] Blood lactate threshold corresponded a running intensity of 15 m/min, while MLSS was determined to be 16 m/min. Serum corticosterone concentrations were significantly higher in 14.5, 16, and 17.5 m/ min groups (298.8±62, 338.3±65, and 354±26 nM, respectively) as compared to that in the control group (210.6±16 nM). Concentrations of NEFA observed in groups 13, 14.5, 16, and 17.5 m/min (662.8±24, 702.35±69, 718.4±34, and 752.8±77 μM, respectively) were significantly higher than those in 10 m/min and control groups (511.1±53 and 412.1±56 μM, respectively). The serum CK concentration recorded for group 17.5 m/min (372.4±56 U/ L) was higher than those recorded for other groups. [Conclusion] The speed above 16 m/min on FRW resulted in increased physiological demands and muscle damage in untrained healthy Wistar rats.