Radical Copolymerization of Acrylic Acid and OEGMA475: Monomer Reactivity Ratios and Structural Parameters of the Copolymer

Hossein Abdollahi,Vahid Najafi,Farshid Ziaee,Kourosh Kabiri,Farhad Narimani 한국고분자학회 2014 Macromolecular Research Vol.22 No.12

Alternative copolymers of acrylic acid (AA) and oligo(ethylene glycol) methyl ether methacryate (475 g/mol (OEGMA475)) macromer, having various amounts of two monomers, were synthesized using aqueous solutionfree radical copolymerization at 50 °C with ammonium persulfate (APS) as an initiator. The structures of the copolymerswere confirmed by nuclear magnetic resonance (NMR) spectroscopy. In fact, samples with different molarratios of two monomers in deionized water were prepared and subsequently copolymerization reaction was performedto low conversion levels (below 10%). Monomer reactivity ratios of OEGMA475, AA pair were estimatedusing the Finemann-Ross (FR), inverted Finemann-Ross (IFR), Kelen-Tüdös (KT), extended Kelen-Tüdös (EKT),Mayo-Lewis (ML) and Yezrelieve-Brokhina-Roskin (YBR) graphical methods. The value ranged from 0.908 to0.963 for rOEGMA and from 0.208 to 0.243 for rAA depending on conversion percentage and calculation methods ofmonomer reactivity ratios. In all the cases, rOEGMA×rAA<1 and rOEGMA>rAA indicate that the resulting copolymer has atendency toward alternation with an azeotropic point in MOEGMA=0.905. Structural parameters of the copolymerswere obtained by calculating the dyad monomer sequence fractions and the mean sequence length. Keywords: oligo(ethylene glycol) methyl ether methacrylate, acrylic acid, monomer reactivity ratios, altern

Fabrication modeling of industrial CO2 ionic liquids absorber by artificial neural networks

Yadollah Abdollahi,Nor Asrina Sairi,Mohamed Khereddine Aroua,Hamid Reza Fard Masoumi,Hossein Jahangirian,Yatimah Alias 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.25 No.-

The fabrication of industrial CO2 blended solution absorber was modeled by artificial neutral network. First the generated model had been statistically evaluated and then its ability of prediction was confirmed by validation test. The validated model was used to predict the desirable density and relative importance of the fabrication’s effective variables. In conclusion, the importance included x[H2O], 36.18%, x[gua], 25.37%, x[MDEA], 25.34% and temperature, 13.11% which showed none of them is negligible as well as the density (g cm3) was validated by further experiment that showed the actual density, 1.101, was quite close to the predicted value, 1.017.

Gastrointestinal Cancer Incidence in East Azerbaijan, Iran: Update on 5 Year Incidence and Trends

Somi, Mohammad Hossein,Golzari, Mehrad,Farhang, Sara,Naghashi, Shahnaz,Abdollahi, Leila Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.9

Background: A cancer registry program has been established in East Azerbaijan and this has emphasized the importance of cancers of gastrointestinal tract in this region. The aim of the present pathology-based cancer registry report is to renew epidemiologic aspects of gastrointestinal tract cancers and estimate recent trends. Materials and Methods: A survey team reviewed and collected all records of cancer cases from all referral and valid pathology laboratories of East Azerbaijan province during September 2007-2011. Crude rates, age-specific rates of cancer incidence and annual percent change were calculated. Results: The total newly diagnosed cancer cases (n=6,889)comprised 4,341 males (63.0%) and 2,540 females (36.9%). Gastric cancer was the most common GI tract cancer with an ASR (per $10^5$) of 23.1 for males and 7.69 for females. The ASRs for esophageal and colorectal cancers were 9.69 and 11.2 in males and 7.35 and 8.93 in females. Trend analysis showed a significant decline for esophageal cancer and increasing incidence for colorectal cancer in females. Conclusions: The prevalence of gastric cancer is high in East Azerbaijan province of Iran. This pathology based cancer registry showed an ascending trend for colorectal cancer and decreasing trend for esophageal cancer in females during 2007-2011.

Chemical incorporation of epoxy-modified graphene oxide into epoxy/novolac matrix for the improvement of thermal characteristics

Ebrahimi Hamidreza,Roghani-Mamaqani Hossein,Salami-Kalajahi Mehdi,Shahi Sina,Abdollahi Amin 한국탄소학회 2020 Carbon Letters Vol.30 No.1

Chemical incorporation of epoxy-modifed graphitic layers in epoxy/novolac phenolic resin matrices was carried out through co-curing of epoxy and novolac resins using triphenylphosphine as catalyst. First, (3-glycidyloxypropyl) trimethoxysilane (GPTMS) was grafted on graphene oxide (GO) surface to obtain epoxidized GO layers. Then epoxy resin and GPTMS-mod�ifed GO were incorporated into thermosetting reaction using novolac resin in the presence of triphenylphosphine. Covalent attachment of GPTMS-modifed GO to the resin matrices resulted in a hybrid composite with high thermal characteristics. Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis (TGA), X-ray dif�fraction, and Raman spectroscopy were used for approving modifcation of GO with GPTMS. The images resulted from scanning and transmission electron microscopies exhibited GO layers with lots of creases turning to smooth layers with a few thin ripples after modifcation with GPTMS. TGA results showed that thermal characteristics of resins were improved by the addition of GPTMS-modifed GO. Char residue of the hybrid composites containing 0.5 and 1 wt% of GPTMS-modifed GO reached 28.1 and 34.3%, respectively. Also, their maximum thermal degradation temperature was also increased by the incorporation of GPTMS-modifed GO.

Indices/Indicators Developed to Evaluate the “Creating Supportive Environments” Mechanism of the Ottawa Charter for Health Promotion: A Setting-Based Review on Healthy Environment Indices/Indicators

Saadati Fatemeh,Nadrian Haidar,Ghassab-Abdollahi Nafiseh,Pashazadeh Fariba,Gilani Neda,Taghdisi Mohammad-Hossein 대한가정의학회 2023 Korean Journal of Family Medicine Vol.44 No.5

This study aimed to identify the indices/indicators used for evaluating the “creating supportive environments” mechanism of the Ottawa Charter for Health Promotion, with a focus on built environments, in different settings. A search for literature with no time limit constraint was performed across Medline (via PubMed), Scopus, and Embase databases. Search terms included “Ottawa Charter,” “health promotion,” “supportive environments,” “built environ-ments,” “index,” and “indicator.” we included the studies conducted on developing, identifying, and/or measuring health promotion indices/indicators associated with “built environments” in different settings. The review articles were excluded. Extracted data included the type of instrument used for measuring the index/indicator, the number of items, participants, settings, the purpose of indices/indicators, and a minimum of two associated examples of the indices domains/indicators. The key definitions and summarized information from studies are presented in tables. In total, 281 studies were included in the review, within which 36 indices/indicators associated with “built environ-ment” were identified. The majority of the studies (77%) were performed in developed countries. Based on their ap-plication in different settings, the indices/indicators were categorized into seven groups: (1) Healthy Cities (n=5), (2) Healthy Municipalities and Communities (n=18), (3) Healthy Markets (n=3), (4) Healthy Villages (n=1), (5) Healthy Workplaces (n=4), (6) Health-Promoting Schools (n=3), and (7) Healthy Hospitals (n=3). Health promotion special-ists, health policymakers, and social health researchers can use this collection of indices/indicators while designing/evaluating interventions to create supportive environments for health in various settings.

Expression Analysis of Two Cancer-testis Genes, FBXO39 and TDRD4, in Breast Cancer Tissues and Cell Lines

Seifi-Alan, Mahnaz,Shamsi, Roshanak,Ghafouri-Fard, Soudeh,Mirfakhraie, Reza,Zare-Abdollahi, Davood,Movafagh, Abolfazl,Modarressi, Mohammad Hossein,Kazemi, Golnesa,Geranpayeh, Lobat,Najafi-Ashtiani, Mi Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.11

Breast cancer accounts for one third of new cancer cases among women. The need for biomarkers for early detection is the stimulus to researchers to evaluate altered expression of genes in tumours. Cancer-testis (CT) genes are a group with limited expression in normal tissues except testis but up-regulation in a wide variety of cancers. We here evaluated expression of two CT genes named FBXO39 and TDRD4 in 32 invasive ductal carcinoma samples, 10 fibroadenomas and 6 normal breast tissue samples, in addition to two breast cancer cell lines, MCF-7 and MDA-MB-231, by the means of quantitative real time RT-PCR. FBXO39 showed significant up-regulation in invasive ductal carcinoma samples in comparison with normal samples. It also was expressed in both cell lines and after RHOXF1 gene knock down it was down-regulated in MCF-7 but up-regulated in the MDA-MB-231 cell line. TDRD4 was not expressed in the MCF-7 cell line and any of the tissue samples except testis. However, it was expressed in MDA-MB-231 and was up-regulated after RHOXF1 gene knock down. Our results show that FBXO39 but not TDRD4 can be used for cancer detection and if proved to be immunogenic, might be a putative candidate for breast cancer immunotherapy.