Knowledge about Gastric Carcinoma in North of Iran, A High Prevalent Region for Gastric Carcinoma: A Population-Based Telephone Survey

Mansour-Ghanaei, Fariborz,Joukar, Farahnaz,Soati, Fatemeh,Mansour-Ghanaei, Alireza,Naserani, Sara Bakhshizadeh Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.7

Background & Objectives: The most northern and northwestern regions of Iran are at a high risk for gastric cancer. The aim of this study was to assess the general population's awareness about risk factors, symptoms and signs, preventive methods and management of gastric carcinoma in a high prevalence city in the North of Iran. Methods: A cross-sectional population-based telephone survey which was conducted on 3,457 residents of Rasht, the capital city of Guilan Province, to assess their awareness regarding gastric carcinoma. The questionnaires contained demographic data and statements on respondents' knowledge about risk factors, symptoms and signs, prevention and management of gastric cancer which were filled by general practitioners after asking the subjects. Data were analyzed in SPSS14. P<0.05 was considered significant. Results: The mean knowledge score of the respondents was $5.05{\pm}1.37$ regarding risk factors of gastric carcinoma, $4.39{\pm}1.99$ regarding symptoms and signs, $6.0{\pm}1.22$ regarding preventive strategies, and $1.6{\pm}1.16$ regarding management. Totally the mean knowledge level of the respondents toward gastric carcinoma would be $17.1{\pm}3.97$ from the maximum grade of 29. The age group of 45-55 y/o, bachelor degree and higher, physicians and nurses, those who had cancer history in friends or had the history of gastrointestinal diseases showed significantly higher knowledge scores (P=0.001). Conclusion: There is a general lack of awareness of cancer risk factors, symptoms and signs, methods of prevention, and importance of early diagnosis and treatment. Educational programs should be developed to promote adherence to recommended screening guidelines.

Outcome of Intestinal Metaplasia in Gastric Biopsy of Patients with Dyspepsia in Guilan Province, North Iran

Mansour-Ghanaei, Fariborz,Joukar, Farahnaz,Soati, Fatemeh,Mansour-Ghanaei, Alireza,Atrkar-Roushan, Zahra Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.6

Background: It is generally accepted that gastric carcinomas are preceded by a sequential multistage process that includes chronic gastritis, gastric atrophy, usually with intestinal metaplasia (IM), and dysplasia. This series of changes in gastric carcinogenesis is often initiated by Helicobacter pylori (H pylori) infection. The aim of the present study was determination of gastric histopathologic changes in IM patients after at least one year in Guilan province, Iran. Materials and Methods: This case-series study was conducted in Guilan Gastrointestinal and Liver Disease Research Center (GLDRC) during 2010 to 2011. Gastric biopsy was performed for all 71 known cases of IM and precanceric lesions including gastric atrophy, IM, dysplasia and H pylori infection were determined after at least one year. Results: Of the total of 71 patients with established IM who were enrolled, 50 had complete-type IM and 21 had incomplete-type IM. Fifty two people had H pylori infection. H pylori eradication was achieved in 39 patients (75%). Secondary pathology findings of patients with IM were complete metaplasia (39.4%), incomplete metaplasia (32.4%), dysplasia (23.9%) and other precanceric lesions (4.2%). Dysplasia (20%vs 33%) occurred in patients who had complete and incomplete IM at baseline respectively (p>0.05). Age, gender, family history of gastric cancer(GC); smoking habits and NSAIDs use were not associated with gastric premalignant lesions in initial and secondary pathologies (p>0.05). The difference became statistically significant between H pylori infection in patients with more than 3 years diagnostic intervals (p<0.05). Statistical difference between eradicators and non-eradicators was not significant. Conclusions: We found that incomplete IM increased the risk of subsequent dysplasia in this study.

Knowledge about Colorectal Cancer in Northern Iran: a Population-Based Telephone Survey

Mansour-Ghanaei, Alireza,Joukar, Farahnaz,Mansour-Ghanaei, Fariborz,Rasoulian, Javid,Naghipour, Mohammad Reza,Fani, Arezoo,Kazemnejad, Ehsan Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.17

Background: Colorectal cancer (CRC) is one of the most common malignancies of the gastrointestinal tract. The aim of this study was to assess the general knowledge of CRC in individuals living in Rasht, Iran, using a population-based cross-sectional telephone survey. Materials and Methods: A total of 1557 participants between 18 and 80 years of age were interviewed using random sampling from the telephone directory. Knowledge of risk factors, symptoms, diagnosis, and prevention of CRC was assessed using a validated questionnaire. Results: The mean knowledge level of the 1,557 respondents (average age 46 y) was $13.5{\pm}4.29$ (maximum possible score = 26), and 46.4% (722/1,557) of the subjects achieved grades lower than the mean score. The mean scores for knowledge of symptoms and risk factors were $3.97{\pm}1.83$ (range: 0-7) and $5.17{\pm}1.65$ (range: 0-9), respectively. Older age, higher education, and employment were significantly associated with better scores for recognition of risk factors and warning symptoms. The majority of subjects correctly identified weight loss (70.2%; 1,093/1,557) and rectal bleeding (63.3%; 986/1,557) as symptoms of CRC, and that smoking (85.9%; 1,337/1,557) and a low-fiber diet (73.4%; 1,143/1,557) were risk factors. Approximately half of the subjects noted increasing age, genetic background and fried food as other risk factors. A considerable number (54.8%; 853/1,557) identified colonoscopy as a screening method for detecting CRC in asymptomatic patients. However, a third of the subjects in the target group for screening (${\geq}50y$) were not interested in undergoing screening, primarily due to a lack of symptoms. Conclusions: Our results suggest that the knowledge of CRC is poor among the public, and therefore greater attempts should be made to increase awareness. Public education emphasizing the risk factors and symptoms of CRC, as well as the importance of regular screening regardless of the presence of symptoms, may help to reduce CRC morbidity and mortality.

Application of impulse damper in control of a chaotic friction-induced vibration

Mansour Ataei,Ali Asghar Atai,Sajjad Mirjavadi,Mohammad Sahebnasagh,Mansour Nikkhah-Bahrami 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.2

Friction-induced vibration is an important phenomenon with adverse effects on many dynamic systems involving friction. In this study,a very simple and well-known one-dimensional friction-induced dynamic system is considered in which the novel PZT stack impulse damper is incorporated into the system. It has been shown that by appropriately tuning the damping parameters, the chaotic behavior is removed quickly and efficiently. It has also been demonstrated that the system is sensitive to parameter change, and minimal modification of these parameters can revert the chaotic or periodic motion.

Should all patients with hypertension be worried about developing severe coronavirus disease 2019 (COVID-19)?

Bahardoust Mansour,Goharrizi Mohammad Ali Sheikh Beig,Bahardoust Mansour,Alvanegh Akbar Ghorbani,Ataee Mohammad Reza,Bagheri Mehdi,Navidiyan Ensiyeh Shabani,Zijoud Seyed Reza Hosseini,Heiat Mohammad 대한고혈압학회 2021 Clinical Hypertension Vol.27 No.2

Background: Hypertension, the most common comorbidity among coronavirus disease 2019 (COVID-19) patients, is accompanied by worse clinical outcomes, but there is lack of evidence about prognostic factors among COVID19 patients with hypertension. We have come up with some prognostic factors to predict the severity of COVID-19 among hypertensive patients. In addition, epidemiologic, clinical and laboratory differences among COVID-19 patients with and without underlying hypertension were evaluated. Methods: Medical profiles of 598 COVID-19 cases were analyzed. Patients were divided into two comparative groups according to their positive or negative history of hypertension. Then, epidemiologic, clinical, laboratory and radiological features and also clinical outcomes were compared. Results: 176 (29.4%) patients had underlying hypertension. Diabetes was significantly higher in hypertensive group [72 (40.9%) vs 76 (18%)] (P-value: 0.001). Cardiovascular and renal disorders were significantly higher in hypertensive patients. (P-value: 0.001 and 0.013 respectively). In COVID-19 patients with hypertension, severe/critical types were significantly higher. [42(23.8%) vs. 41(9.7%)], (P-value: 0.012). In the logistic regression model, Body mass index > 25 (ORAdj: 1.8, 95% CI: 1.2 to 2.42; P-value: 0.027), age over 60 (ORAdj: 1.26, 95% CI: 1.08 to 1.42; P-value: 0.021), increased hospitalization period (ORAdj: 2.1, 95% CI: 1.24 to 2.97; P-value: 0.013), type 2 diabetes (ORAdj: 2.22, 95% CI: 1.15 to 3.31; P-value: 0.001) and chronic kidney disease (ORAdj: 1.83, 95% CI: 1.19 to 2.21; P-value: 0.013) were related with progression of COVID-19. Conclusion: Hypertensive patients with Age > 60-year-old, BMI > 25 Kg/m2 , CVD, diabetes and chronic kidney disease are associated with poor outcomes in those with COVID-19 infection.

Synthesis of Borosilicate Zeotypes by Steam-assisted Conversion Method

Mansour, R.,Lafjah, M.,Djafri, F.,Bengueddach, A. Korean Chemical Society 2007 대한화학회지 Vol.51 No.2

펜타실 구조와 유사한 제올라이트형 결정성 보로실리케이드를 수증기 쪼임법으로 제조하였다. 실제 여러 종류의 서로 다른 붕소화합물 원료를 사용하여 만든 다양한 조성의 Na2O.SiO2.B2O3.TBA2O 겔을 건조시켜 얻은 무정형 분말을 수열합성 분위기에서 수증기를 쪼임으로써 펜타실 구조를 갖는 보로실리케이트 제올라이트를 합성하였다. 이때 MFI와 MEL 구조가 90:10의 비율을 혼합되어 있는 새로운 중간구조 물질이 얻어 졌다. 본 연구로부터, 젖어 있는 반응성 고체상 물질이 수증기와 높은 pH 분위기에서 결정화가 이루어짐을 확인하였다. X-선 회절법으로 분석한 결과 생성물은 우수한 결정성을 가질뿐만 아니라 독특한 촉매적 성질을 보일것으로 예상되는 구조를 갖는다. 또한 반전중심을 갖는 MFI 구조의 펜타실 층이 규칙적으로 쌓이는 모양을 보이지만 이는 MEL 구조의 거울상 층으로 이루어진 결함에 의해 방해된다. 생성물은 77 K 질소흡착법에 의하면 미세기공 부피가 0.160 cc/g 로서 순수한 MFI 구조 물질이 갖는 0.119 cc/g 보다 더 크며, 비교적 넓은 비표면적(~600 m2/g)을 보인다. 적외선 스펙트럼에서는 900.75 cm-1에서 흡수띠를 보이는데, 이는 붕소가 결정성 실리케이트의 사면체 구조내에 위치함을 뜻한다. Intermediate pentasil borosilicate zeolite-like materials have been crystallized by a novel method named steam-assisted conversion, which involves vapor-phase transport of water. Indeed, amorphous powders obtained by drying Na2O.SiO2.B2O3.TBA2O gels of various compositions using different boron sources are transformed into crystalline borosilicate zeolite belonging to pentasil family structure by contact with vapors of water under hydrothermal conditions. Using a variant of this method, a new material which has an intermediate structure of MFI/MEL in the ratio 90:10 was crystallized. The results show that steam and sufficiently high pH in the reacting hydrous solid are necessary for the crystallization to proceed. Characterization of the products shows some specific structural aspects which may have its unique catalytic properties. X-ray diffraction patterns of these microporous crystalline borosilicates are subjected to investigation, then, it is shown that the product structure has good crystallinity and is interpreted in terms of regular stacking of pentasil layers correlated by inversion centers (MFI structure) but interrupted by faults consisting of mirror-related layers (MEL structure). The products are also characterized by nitrogen adsorption at 77 K that shows higher microporous volume (0.160 cc/g) than that of pure MFI phase (0.119 cc/g). The obtained materials revealed high surface area (~600 m2/g). The infrared spectrum reveals the presence of an absorption band at 900.75 cm-1 indicating the incorporation of boron in tetrahedral sites in the silicate matrix of the crystalline phase.

Performance of polymer concrete incorporating waste marble and alfa fibers

Mansour, Rokbi,El Abidine, Rahmouni Z.,Brahim, Baali Techno-Press 2017 Advances in concrete construction Vol.5 No.4

In this study a polymer concrete, made up of natural aggregates and an orthophthalic polyester binder, reinforced with natural Alfa fibers has been studied. The results of flexural testing of unreinforced polymer concrete with different rates of charges (marble) showed that the concrete with 20% of marble is stronger and more rigid compared to other grades. Hence, a rate of 20% of marble powder is selected as the optimal value in the development of polymer concrete reinforced Alfa fibers. The fracture results of reinforced polymer concrete with 1 and 2 wt% of chopped untreated or treated Alfa fibers showed that treated Alfa (5% NaOH) fiber reinforced polymer concrete has higher fracture properties than other composites. We believe that this type of concrete provides a very promising alternative for the building industry seeking to achieve the objectives of sustainable development.

Thermal buckling analysis of annular FGM plate having variable thickness under thermal load of arbitrary distribution by finite element method

Mansour Mohieddin Ghomshei,Vahid Abbasi 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.4

In this paper, a finite element formulation is developed for analyzing the axisymmetric thermal buckling of FGM annular plates of variable thickness subjected to thermal loads generally distributed nonuniformly along the plate radial coordinate. The FGM assumed to be isotropic with material properties graded in the thickness direction according to a simple power-law in terms of the plate thickness coordinate, and has symmetry with respect to the plate midplane. At first, the pre-buckling plane elasticity problem is developed and solved using the finite element method, to determine the distribution of the pre-buckling in-plane forces in terms of the temperature rise distribution. Subsequently, based on Kierchhoff plate theory and using the principle of minimum total potential energy, the weak form of the differential equation governing the plate thermal stability is derived, then by employing the finite element method, the stability equations are solved numerically to evaluate the thermal buckling load factor. Convergence and validation of the presented finite element model are investigated by comparing the numerical results with those available in the literature. Parametric studies are carried out to cover the effects of parameters including thickness-to-radius ratio, taper parameter and boundary conditions on the thermal buckling load factor of the plates.

Ultimate Strength of Ships Under Combined Vortical and Horizontal Moments

Mansour, A.E.,Lin, Y.H.,Paik, J.K. The Society of Naval Architects of Korea 1998 Journal of ship and ocean technology Vol.2 No.1

In this paper ALPS/ISUM will be used to analyze the ultimate strength of four ships under vertical moment. Two of the ships are commercial vessels and the other two are cruisers. A procedure is also developed to determine the ultimate strength of the four vessels under combined vertical and horizontal moments. A simple analytical expression for an interaction relation under combined moments is proposed based on the results obtained for the four ships and the earlier work.

Effects of seed sources and shade on vigor of Brant's oak seedling

Mansour Taghvaei 한국생태학회 2010 Journal of Ecology and Environment Vol.33 No.4

The use of local seed provenance is often recommended in forest restoration. Early vigor is a combination of the performance of seed germination and emergence after planting. The ability of young Brant's oak plants to grow and develop after emergence and its dependence on local habitat conditions was investigated in this study. The effects of seed source and shade on early growing seedlings of Brant's oak (Quercus brantii L.) were determined in field measurements. Seeds of Quercus brantii L. were collected from 4 forest areas (seed sources) in southern Zagros (Provinces of Kohkilouyeh-Bouyer Ahmad and Fars) at altitudes of 850, 1,100, 1,500, 2,100 m a.s.l., and planted in a nursery constructed in southwestern Iran. According to a split-plot design consisting of four blocks, each containing two main treatment plots (no shading, partial shading), each main plot was sub-divided into four sub-plots (for elevations of 850, 1,100, 1,500 and 2,100 m). Results showed that shade treatments had significant effects on emergence percentage and rate, shoot length,shoot dry weight (SDW), root dry weight (RDW), leaf area (LA), and chlorophyll content. Ecological factors also had an effect on seed performance. Altitude of seed source had a very significant effect on root length, LA, SDW, and RDW. The seeds collected from 850 m a.s.l. elevation showed the highest performance, especially in leaf area, root length, shoot dry weight, and root dry weight. Our results showed that the altitude of 850 m a.s.l. was the best for collecting Brant's oak seeds.