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A Control Chart for Monitoring the Process Mean Using Successive Sampling Over Two Occasions
Azam, M.,Arshad, A.,Aslam, M.,Jun, C. H. Springer Science + Business Media 2017 Arabian journal for science and engineering: AJSE Vol.42 No.7
<P>This article proposes a new control chart to monitor the process mean based on the sample statistics from two successive occasions. First occasion units are independently drawn to obtain information of the study variable, and the second occasion units are drawn collectively with a retained portion of first occasion as matched units, while the other portion is the collection of the fresh units from the remaining unselected units at first occasion. The in-control and out-of-control average run lengths (ARLs) are derived for performance assessment under mean shifts. The performance of the proposed control chart is compared with traditional Shewhart control chart and a EWMA chart in terms of ARLs, which exhibits better performance when process is shifted from the target mean.</P>
Role of interleukin-6 (IL-6) in predicting gestational diabetes mellitus
( Azam Amirian ),( Mahin Balouchi Mahani ),( Fatemeh Abdi ) 대한산부인과학회 2020 Obstetrics & Gynecology Science Vol.63 No.4
Gestational diabetes mellitus (GDM) is the most common pregnancy-associated metabolic disorder that is steadily increasing worldwide. Early diagnosis of pregnant women susceptible to GDM is the first step for deploying effective preventive treatment to reduce maternal, fetal, and neonatal complications. The diagnostic process of GDM is still controversial and interleukin-6 (IL-6) is one of the most recent markers used for the diagnosis of GDM. In this study, we aimed to systematically review the role of IL-6 in the diagnosis of GDM. In this systematic review, Google Scholar, Scopus, PubMed, ISI Web of Science, ProQuest, and MEDLINE databases were searched using the following keywords: GDM, screening, and IL-6, with the time interval 2009-2020. The quality of articles was assessed using the Strengthening the Reporting of Observational Studies in Epidemiology checklist. Twenty-four articles with desired quality that met the inclusion criteria were selected and reviewed further. Sixteen studies showed a statistically significant association, while 8 studies did not report any relationship between IL-6 levels and GDM. Based on the results of these studies, assessing the serum IL-6 levels can be investigated a newly established diagnostic biomarker for GDM. Therefore, through early diagnosis of susceptible women, effective measures can be implemented to reduce its complications.
( Azam Rahimpour ),( Behrouz Vaziri ),( Reza Moazzami ),( Leila Nematollahi ),( Farzaneh Barkhordari ),( Leila Kokabee ),( Ahmad Adeli ),( Fereidoun Mahboudi ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.8
Cell line development is the most critical and also the most time-consuming step in the production of recombinant therapeutic proteins. In this regard, a variety of vector and cell engineering strategies have been developed for generating high-producing mammalian cells; however, the cell line engineering approach seems to show various results on different recombinant protein producer cells. In order to improve the secretory capacity of a recombinant tissue plasminogen activator (t-PA)-producing Chinese hamster ovary (CHO) cell line, we developed cell line engineering approaches based on the ceramide transfer protein (CERT) and X-box binding protein 1 (XBP1) genes. For this purpose, CERT S132A, a mutant form of CERT that is resistant to phosphorylation, and XBP1s were overexpressed in a recombinant t-PA-producing CHO cell line. Overexpression of CERT S132A increased the specific productivity of t-PA-producing CHO cells up to 35%. In contrast, the heterologous expression of XBP1s did not affect the t-PA expression rate. Our results suggest that CERTS132A- based secretion engineering could be an effective strategy for enhancing recombinant t- PA production in CHO cells.
Azam Chahardoli,Farshad Qalekhani,Yalda Shokoohinia,Ali Fattahi 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.111 No.-
Titanium dioxide nanoparticles (TiO2NPs) were produced using a crud flavonoid luteolin (LT) by the greenprocess. Physicochemical characterizations of LT mediated synthesis of TiO2NPs (LT-TiO2NPs) were analyzedby different techniques. The biocompatibility of LT-TiO2NPs was evaluated by assessing their cytotoxicity,inhibition of protein denaturation, hemolysis effects, and membrane stabilization activity. Thesynthesized LT-TiO2NPs exhibited mostly rod-shaped morphology, rutile crystalline structure with lengthabout 33.3–135 nm and width in 16.6–58 nm. Under LT-TiO2NPs treatments, the cell viability of cancercells was decreased in a dose-dependent manner. According to the results, the IC50 values of LT-TiO2NPswere between 12.5–25 lg/mL for A375 and MCF-7 cancer cells, and its value was below 50 lg/mL for skinfibroblast. These NPs also induced intracellular reactive oxygen species (ROS) generation and causedmitochondrial disruption in cancer cells, leading to the induction of intrinsic apoptosis. These biosynthesizedNPs did not show denaturation of bovine serum albumin (BSA) protein and hemolytic or heatinducedhemolytic effects, which confirmed their membrane stabilization activity without damagingred blood cells (RBCs) membrane integrity. Therefore, this research provides valuable results in the caseof green synthesis of LT-TiO2NPs and their specific properties, biocompatibility, and their potential to beused in biomedical fields.
Removal of azo dye from aqueous solution using an anionic polymeric urethane absorbent (APUA)
Azam Pirkarami,Mohammad Ebrahim Olya,Farhood Najafi 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
This paper is a report on an original research which investigated the effect of a number of experimentalparameters on the removal of Food Red 17 (FR17) from an aqueous solution using anionic polymericurethane absorbent (APUA) as an adsorbent. The optimum value of adsorbent dose was found to be35 mg L 1. Further, maximum dye removal took place at pH 3 and 45 8C. The fourth parameter, stirringthe solution during the treatment, also resulted in significant removal improvement. The amount of FR17adsorbed on APUA surface was quantified using the Langmuir equation. UV irradiation was also found tohave a positive effect on the removal process. The efficiency of the treatment was verified using FT-IRspectrometry results for APUA, FR17, and APUA-FR17. Finally, the adsorbent was subjected to SEMcharacterization.
Impact of Exchange Rate Volatility on Trade Balance in Malaysia
AZAM, Abdul Hafizh Mohd,ZAINUDDIN, Muhamad Rias K.V.,ABEDIN, Nur Fadhlina Zainal,RUSLI, Nurhanani Aflizan Mohamad Korea Distribution Science Association 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.10
This paper examined the impact of real exchange rate volatility on trade balance in Malaysia by using quarterly data from year 2000 until 2019. Generalized Autoregressive Heteroscedasticity (GARCH) model was used to extract the volatility component of real exchange rate before examining its impact on trade balance. Furthermore, Autoregressive Distributed Lag (ARDL) model was used to investigate the long-run relationship and short-run dynamic between trade balance, money supply, national income and volatility of exchange rate. Empirical results show the existence of co-movement between variables under study in the long-run. However, the results also suggest that volatility of real exchange rate does not significantly affect trade balance neither in the long-run nor short-run. The risk which is associated in the movement of exchange rate do not influence trader's behaviour toward Malaysia exports and imports. Thus, it should be note that any depreciation or appreciation in Malaysian Ringgit do not have an impact towards trade balance either it is being further improved or deteriorates. Hence, exchange rate volatility may not be too concern for policymakers. This may be partially due to manage floating exchange rate regime that has been adopted by Malaysia eventually eliminated the element of risk in the currency market.
Azam, Ashraful,Kim, Jungmo,Park, Junyong,Novak, Travis G.,Tiwari, Anand P.,Song, Sung Ho,Kim, Bumsoo,Jeon, Seokwoo American Chemical Society 2018 NANO LETTERS Vol.18 No.9
<P>Two-dimensional (2D) transitional metal oxides (TMOs) are an attractive class of materials due to the combined advantages of high active surface area, enhanced electrochemical properties, and stability. Among the 2D TMOs, 2D tungsten oxide (WO<SUB>3</SUB>) nanosheets possess great potential in electrochemical applications, particularly in electrochromic (EC) devices. However, feasible production of 2D WO<SUB>3</SUB> nanosheets is challenging due to the innate 3D crystallographic structure of WO<SUB>3</SUB>. Here we report a novel solution-phase synthesis of 2D WO<SUB>3</SUB> nanosheets through simple oxidation from 2D tungsten disulfide (WS<SUB>2</SUB>) nanosheets exfoliated from bulk WS<SUB>2</SUB> powder. The complete conversion from WS<SUB>2</SUB> into WO<SUB>3</SUB> was confirmed through crystallographic and elemental analyses, followed by validation of the 2D WO<SUB>3</SUB> nanosheets applied in the EC device. The EC device showed color modulation of 62.57% at 700 nm wavelength, which is 3.43 times higher than the value of the conventional device using bulk WO<SUB>3</SUB> powder, while also showing enhancement of ∼46.62% and ∼62.71% in switching response-time (coloration and bleaching). The mechanism of enhancement was rationalized through comparative analysis based on the thickness of the WO<SUB>3</SUB> components. In the future, 2D WO<SUB>3</SUB> nanosheets could also be used for other promising applications such as sensors, catalysis, thermoelectric, and energy conversion.</P> [FIG OMISSION]</BR>