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Antifouling nanocomposite polymer coatings for marine applications:A review on experiments,mechanisms,and theoretical studies

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Journal of Materials Science & Technology 2022年第23期118卷 73-113页

作者： Sepideh Pourhashem abdolvahab seif Farhad Saba Elham Garmroudi Nezhad Xiaohong Ji Ziyang Zhou Xiaofan Zhai Majid Mirzaee Jizhou Duan Alimorad Rashidi Baorong Hou Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China Open studio for marine Corrosion and Protection Pilot National Laboratory for Marine Science and TechnologyQingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Nanotechnology Research Center Research Institute of Petroleum Industry(RIPI)West Entrance Blvd.Olympic VillageTehranIran Department of Materials Science and Engineering Engineering FacultyFerdowsi University of MashhadMashhadIran University of Chinese Academy of Sciences Beijing 100039China Non-Metallic Materials Research Group Niroo Research InstituteTehran 14665517Iran

Marine fouling is a worldwide challenge with huge damages on industrial structures,side effects on economics of industries,and environmental and safety-related *** approaches have been used for combating fouling in the marine ***,nanocomposite polymer coatings are a novel generation of antifouling coatings with merits of toxin-free chemical composition and ease of large-scale *** such as nano-metals,nano-metal oxides,metal-organic frameworks,carbon-based nanostructures,MXene,and nanoclays have antibacterial and antifouling properties in the polymer ***,these nanomaterials can improve the corrosion resistance,mechanical strength,weathering stability,and thermal resistance of the polymer ***,in this review paper,the antifouling nanocomposite coatings are introduced and antifouling mechanisms are *** review explicitly indicates that the antifouling efficiency of the nanocomposite coatings depends on the properties of the polymer matrix,the inherent properties of the nanomaterials,the weight percent and the dispersion method of the nanomaterials within the coating matrix,and the chemicals used for modifying the surface of the nanomaterials;meanwhile,the hybrids of different nanomaterials and appropriate chemical agents could be used to improve the antifouling behavior of the prepared ***,the theoretical studies are introduced to pave the way of researchers working on theantifouling coatings,and the importance of the theoretical studies and computational modeling along with the experimental research is notified to develop antifouling coatings with high efficiency.

关键词： Antifouling nanocomposite coatings Nano-metal oxides Carbon-based nanomaterials MXene and nanoclays Theoretical studies

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Intrinsic luminescence centers in γ- and θ-alumina nanoparticles

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Chinese Physics B 2017年第3期26卷 373-383页

作者： abdolvahab Amirsalari Saber Farjami Shayesteh Reza Taheri Ghahrizjani Nanostructures Labratory Department of Physics University of Guilan Department of Physics Optics and Laser Group Shahreza Branch Islamic Azad University

In this study, we investigate the photoluminescence （PL） properties of γ and θ-alumina nanoparticles synthesized by the chemical wet method followed by annealing. The obtained experimental results indicate the presence of some favorable near ultraviolet （NUV）-orange luminescent centers for usage in various luminescence applications, such as oxygen vacancies （F, F＋, F2＋, and F2 centers）, OH related defects, cation interstitial centers, and some new luminescence bands attributed to trapped-hole centers or donor-acceptor centers. The energy states of each defect are discussed in detail. The defects mentioned could alter the electronic structure by producing some energy states in the band gap that result in the optical absorption in the middle ultraviolet （MUV） region. Spectra show that photoionazation of F and F2 centers plays a crucial role in providing either free electrons for the conduction band, or the photoconversions of aggregated oxygen va- cancies into each other, or mobile electrons for electrons-holes recombination process by the Shockley-Read-Hall （SRH） mechanism.

关键词： photoluminescence center defect oxygen vacancy emission

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Antimicrobial susceptibility of Helicobacter pylori strains isolated from patients in Shiraz, Southern Iran

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World Journal of Gastroenterology 2010年第45期16卷 5746-5751页

作者： Shohreh Farshad abdolvahab Alborzi Aziz Japoni Reza Ranjbar Kazem Hosseini Asl Parisa Badiee Maneli Amin Shahidi Marziyeh Hosseini Professor Alborzi Clinical Microbiology Research Centre Shiraz University of Medical SciencesShiraz 71937-11351Iran Molecular Biology Research Center Baqiyatallah University of Medical SciencesTehran 19945-581Iran Gastroenterohepatology Research Center Shiraz University of Medical SciencesNemazee HospitalShiraz 71345-1414Iran

AIM: To improve our understanding of Iranian regional variation in Helicobacter pylori (H. pylori ) antibiotic resistance rates to find the best antibiotic therapy for eradication of H. pylori ***: A total of 266 patients undergoing endoscopy in Shiraz, Southern Iran, were included in this study. H. pylori strains were isolated from antral biopsies by culture and confirmed by the rapid urease-test and gram staining. Antibiotic susceptibility of H. pylori isolates was determined by ***: A total of 121 H. pylori strains were isolated, 50 from male and 71 from female patients. Data showed that 44% (n = 53), 20% (n = 24), 5% (n = 6), and 3% (n = 4) of all strains were resistant to the antibiotics metronidazole, amoxicillin, clarithromycin, and tetracycline, respectively. When the antibiotics were considered together we found 11 sensitivity patterns for the strains. Resistance to metronidazole was significantly higher in female than in male patients (P 256 mg/L) which was found in 71% of the isolates is considerable. In the case of amoxicillin, an increased resistance rate of 20% is worrying. Resistance to clarithromycin and tetracycline is also emerging among the H. pylori strains in our region.

关键词： Gastric disorders Helicobacter pylori Iran Sensitivity Treatment

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Organisms causing spontaneous bacterial peritonitis in children with liver disease and ascites in Southern Iran

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World Journal of Gastroenterology 2006年第36期12卷 5890-5892页

作者： Mahmood Haghighat Seyed Mohsen Dehghani abdolvahab Alborzi Mohammad Hadi Imanieh Bahman Pourabbas Mehdi Kalani Department of Pediatric Gastroenterology Shiraz University of Medical Science Shiraz Iran Department of Professor Alborzi Clinical Microbiology Research Center Shiraz University of Medical Science Shiraz Iran

AIM： To determine the causative agents of spontaneous bacterial peritonitis （SBP） in children with liver disease and ascites in our center. METHODS： During a 2.5 year period, from September 2003 to March 2006, 12 patients with 13 episodes of SBP were studied. In all cases at the time of admission serum albumin and glucose, urinalysis and urine culture was performed. Analysis [white blood cell （WBC） count with differential, albumin, glucose], gram stain, culture by BACTEC method and antibiogram was done on ascitic fluids. Abdominal paracentesis was repeated after 48 h of antibiotic therapy for bacteriologic assay. The patients were followed for at least three months in a gastroenterology clinic. RESULTS： There were 7 girls （58%） and 5 boys （42%） with a median age of 5.2 years （range, 6 mo to 16 years）. All cases had positive ascitic fluid culture. Gram stain was positive in 5 （38.5%） of them. The isolated organisms were S. pneumoniae in 5 （38.5%）, E. coli in 2 （15.3%）, S. viridans in 2 （15.3%）, and K. pneumoniae, H. influenza, Enterococci, and nontypable Streptococcus each in one （7.7%）. All of them except Enterococci were sensitive to ciprofloxacin and ceftriaxone. All ascitic fluid cultures were negative after 48 h of antibiotic therapy. CONCLUSION： S. pneumoniae is the most common cause of SBP in the pediatric age group and we recommend a third generation cephalosporine （e.g., Ceftriaxlone or Cefotaxime） for empirical therapy in children with SBP.

关键词： Spontaneous bacterial peritonitis Children Cirrhosis Causes Empirical therapy

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Interleukin-12 as a Genetic Adjuvant Enhances Hepatitis C Virus NS3 DNA Vaccine Immunogenicity

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Virologica Sinica 2013年第3期28卷 167-173页

作者： Malihe Naderi Atefeh Saeedi abdolvahab Moradi Mishar Kleshadi Mohammad Reza Zolfaghari Ali Gorji Amir Ghaemi Department of Microbiology Qom branch Islamic Azad University Department of Microbiology Lahijan Branch Islamic Azad University Golestan Research Center of Gastroenterology and Hepatology-GRCGH Department of Microbiology Golestan University of Medical Sciences Shefa Neuroscience Research Centre Institut für Physiologie I Westflische Wilhelms-Universitt Münster Klinik und Poliklinik für Neurochirurgie Westf lische Wilhelms-Universitt Münster

Hepatitis C virus (HCV) chronic infection is a worldwide health problem, and numerous efforts have been invested to develop novel vaccines. An efficient vaccine requires broad immune response induction against viral proteins. To achieve this goal, we constructed a DNA vaccine expressing nonstructural 3 (NS3) gene (pcDNA3.1-HCV-NS3) and assessed the immune response in C57BL/6 mice. In this study, the NS3 gene was amplified with a nested-reverse transcriptase-polymerase chain reaction (RT-PCR) method using sera of HCV-infected patients with genotype 1a. The resulting NS3 gene was subcloned into a pcDNA3.1 eukaryotic expression vector, and gene expression was detected by western blot. The resultant DNA vaccine was co-administered with interleukin-12 (IL-12) as an adjuvant to female C57BL/6 mice. After the final immunizations, lymphocyte proliferation, cytotoxicity, and cytokine levels were assessed to measure immune responses. Our data suggest that co-administration of HCV NS3 DNA vaccine with IL-12 induces production of significant levels of both IL-4 and interferon (IFN)-γ (p<0.05). Cytotoxicity and lymphocyte proliferation responses of vaccinated mice were significantly increased compared to control (p<0.05). Collectively, our results demonstrated that co-administration of HCV NS3 and IL-12 displayed strong immunogenicity in a murine model.

关键词： Hepatitis C virus (HCV) NS3 Interleukin-12 DNA vaccine

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Investigation of Asphaltene Deposition and Precipitation in Production Tubing

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International Journal of Clean Coal and Energy 2017年第1期6卷 14-29页

作者： abdolvahab Rastgoo Riyaz Kharrat Petroleum University of Technology Ahwaz Iran

Asphaltenes are complex molecular entities, which together with resins, aromatic hydrocarbons and saturates forms the crude oil. Asphaltenes and resins are in the thermodynamic equilibrium at static reservoir condition. However, asphaltene can precipitate due to changes in thermodynamic condition. Asphaltene deposition in production tubings has been an outstanding problem with wide economic impact on the oil industry. Meanwhile, the use of real-time tools to monitor depositions along the well is of great difficulty. In this work, the asphaltene precipitation region in a single phase flow wellbore is predicted for an oil well of the Iranian oil field. Then, asphaltene deposition thickness along the well is predicted for three time intervals. The simulation results indicated that asphaltene thickness exceeded more than 50% of tubing radius;therefore, a reduction in flow rate, an increase in pressure drop and tubing blockage are expected. Moreover, it is shown the deposits thickness along the wellbore has approximately a skew normal distribution shape, which could be the result of increases in velocity and excess pressure drop.

关键词： Asphaltene Precipitation Asphaltene Deposition Wellbore Production Decline

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The Association between Waterpipe Smoking and Metabolic Syndrome: A Cross-Sectional Study of the Bushehr Elderly Health Program

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Biomedical and Environmental Sciences 2021年第11期34卷 910-915页

作者： Danesh Soltani Ramin Heshmat Ali Vasheghani-Farahani Noushin Fahimfar Farzad Masoudkabir Haleh Ashraf abdolvahab Baradaran Iraj Nabipour Bagher Larijani Afshin Ostovar Gita Shafiee Cardiac Primary Prevention Research Center(CPPRC) Tehran Heart CenterTehran University of Medical SciencesTehranIran Chronic Diseases Research Center Endocrinology and Metabolism Population Sciences InstituteTehran University of Medical SciencesTehranIran Osteoporosis Research Center Endocrinology and Metabolism Clinical Sciences InstituteTehran University of Medical SciencesTehranIran Research Development Center Sina HospitalTehran University of Medical SciencesTehran Iran The Persian Gulf Marine Biotechnology Research Center The Persian Gulf Biomedical Sciences Research InstituteBushehr University of Medical SciencesBushehrIran Endocrinology and Metabolism Research Center Endocrinology and Metabolism Clinical Sciences InstituteTehran University of Medical SciencesTehranIran

Waterpipe(WP),a less common method of tobacco smoking than cigarette smoking(CS),has become increasingly popular over the last *** to popular belief,WP smoking is far from harmless and has multiple health risks simila... 详细信息

关键词： Metabolic exceeding smoking

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Study of Hepatitis B Virus Genotypes and Mutation in 1762 &1764 Nucleotides of X Gene in Chronic HBV Patients from Golestan Province—Iran

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Health 2016年第13期8卷 1397-1401页

作者： Sareh Zhand Ghassem Rostamian Alijan Tabarraei abdolvahab Moradi Department of Microbiology School of Medicine Golestan University of Medical Sciences Gorgan Iran Department of Medicine School of Medicine Iran University of Medical Sciences Tehran Iran

Introduction: More than 350 million people are chronic carriers of HBV and many of them develop progressive diseases, including cirrhosis and hepatocellular carcinoma. Many of those infected develop persistent disease and a proportion goes on to develop liver failure and cancer. Researchers showed that double mutations of the x gene at position 1762 and 1764, have been found in chronic hepatitis B. These mutations were proposed to be associated with fulminant hepatitis B increasing risk of hepatocellular carcinoma. This project aimed to investigate mutation in the x gene region of HBV infected patients in Golestan province, Iran. Method: 100 patients were entered in this study. Hepatitis B viral DNA was extracted from plasma and PCR was performed using specific primers. Direct sequencing and alignment of x gene were applied using reference sequence from Gene Bank database (Okamoto, 1988;Accession number AB033559). Results: Among the chronic HBV patients 51% were male. The results showed that 49% of patients had A1762T, G1764A mutations changing AGG to stop codon TGA. 27% and 24% of cases were showed mutation only in A1762T and G1764A positions respectively. Conclusion: This study was shown presence of X gene mutation in HBV infected people in Golestan province, Iran. The rate of mutation in two positions 1762 and 1764 of HBV genotype D X gene was higher than the average rate of the world (34%).

关键词： HBV X Gene Mutation Genotype Iran

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