Oral non Squamous Cell Malignant Tumors in an Iranian Population: a 43 year Evaluation

Mohtasham, Nooshin,Saghravanian, Nasrollah,Goli, Maryam,Kadeh, Hamideh Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.18

Background: The prevalence of non-squamous cell malignant tumors of the oral cavity has not been evaluated in Iran extensively. The aim of this study was to evaluate epidemiological aspects of the oral malignancies with non-squamous cell origin during a 43-year period in the Faculty of Dentistry, Mashhad University of Medical Sciences, Iran. Materials and Methods: In this retrospective study, the records of all patients referred to dental school of Mashhad university of medical sciences in northeast of Iran, during the period 1971-2013 were evaluated. All confirmed samples of oral non squamous cell malignant tumors were included in this study. Demographic information including age, gender and location of the lesions were extracted from patient's records. Data were analyzed using SPSS statistical soft ware, Chi-square and Fisher's exact tests. Results: Among 11,126 patients, 188 (1.68%) non squamous cell malignant tumors were found, with mean age of 39.9 years ranging from 2 to 92 years. The most common tumors were mucoepidermoid carcinoma (33 cases) and lymphoma (32 cases). Non squamous cell malignant tumors occurred almost equally in men (94 cases) and women (93 cases). Most (134 cases) of them were located peripherally with high frequency in salivary glands (89 cases) and 52 cases were centrally with high frequency in the mandible (38 cases). Conclusions: More findings in this survey were similar to those reported from other studies with differences in some cases; it may be due to variation in the sample size, geographic and racial differences in tumors.

Analysis of Genotype-by-Environment Interaction for Grain Yield of Rainfed Durum Wheat Genotypes in Warm Winter Areas of Iran

Reza Mohammadi,Mohtasham Mohammadi,Rahmatollah Karimizadeh,Ahmed Amri 한국작물학회 2010 Journal of crop science and biotechnology Vol.13 No.4

This study was performed for pattern analysis of genotype-by-environment (GE) interaction on 20 durum wheat genotypes grown in 15 testing environments during 2004 - 06 in Iran. Combined analysis of variance showed significant genotypes (G), environments (E), and GE interactions (P < 0.01), with environmental main effects being the predominant source of variation, followed by GE interaction. The results showed various patterns of genotype responses to different environment groups and assisted in structuring the durum wheat testing locations with identification of two major-environment groups with high genotype discrimination ability. The locations (Gachsaran and Ilam) corresponding to warm and semi-arid aresa were similar in genotype discrimination and showed no association with the other testing locations (Gonbad, Moghan, and Khoramabad) representing the Mediterranean area, indicating they differ in rankings of genotypes. The top-yielding genotypes, G13, G14 and G9, were highly adapted to warm and semi-arid environments,but those corresponding to the Mediterranean area had a high ability to discriminate the genotypes G16, G11, and Saimareh. The stability and adaptability of specific genotypes were assessed by plotting their nominal grain yields at specific environments in an ordination biplot, which aided in the identification of environment groups. Appropriate check genotypes for all environments or for specific environments were also identified. Pattern analysis allowed a sensible and useful summarization of GE interaction data set and helped to facilitate selecting superior genotypes for target-growing sites.

Blast Fragility of Steel Moment-Resisting Buildings for Different Seismic Design Levels

Hamed Dadkhah,Mohtasham Mohebbi 한국강구조학회 2021 International Journal of Steel Structures Vol.21 No.6

The main aim of this study is to evaluate how much the seismic design level can aff ect the fragility of steel moment-resisting buildings against external explosion hazard. To this end, the blast fragility is developed for steel moment-resisting buildings designed for various seismic intensities. Three steel moment-resisting buildings with diff erent heights of 4, 8 and 12 stories are designed for two seismic hazard levels (10% and 2% exceedance probabilities in 50 years). A sensitivity analysis has been fi rst performed to show high importance of probabilistic-based assessment. Fragility curve has been then developed under explosion hazard. The results show that buildings are safe against explosion hazard with the charge weight less than 4000 kg whereas low-rise buildings are strongly vulnerable against the higher charge weight. Blast performance of high-rise buildings is more reliable than that of low-rise buildings. It can be found from the results that increasing the seismic design level of low-rise buildings can lead to safer building against explosion hazard whereas in high-rise buildings, this cannot be eff ective to make building safer against explosion hazard.

Analysis of Genotype-by-Environment Interaction for Grain Yield of Rainfed Durum Wheat Genotypes in Warm Winter Areas of Iran

Mohammadi, Reza,Mohammadi, Mohtasham,Karimizadeh, Rahmatollah,Amri, Ahmed 한국작물학회 2010 Journal of crop science and biotechnology Vol.13 No.4

This study was performed for pattern analysis of genotype-by-environment (GE) interaction on 20 durum wheat genotypes grown in 15 testing environments during 2004 - 06 in Iran. Combined analysis of variance showed significant genotypes (G), environments (E), and GE interactions (P < 0.01), with environmental main effects being the predominant source of variation, followed by GE interaction. The results showed various patterns of genotype responses to different environment groups and assisted in structuring the durum wheat testing locations with identification of two major-environment groups with high genotype discrimination ability. The locations (Gachsaran and Ilam) corresponding to warm and semi-arid aresa were similar in genotype discrimination and showed no association with the other testing locations (Gonbad, Moghan, and Khoramabad) representing the Mediterranean area, indicating they differ in rankings of genotypes. The top-yielding genotypes, G13, Gl4 and G9, were highly adapted to warm and semi-arid environments, but those corresponding to the Mediterranean area had a high ability to discriminate the genotypes G16, G11, and Saimareh. The stability and adaptability of specific genotypes were assessed by plotting their nominal grain yields at specific environments in an ordination biplot, which aided in the identification of environment groups. Appropriate check genotypes for all environments or for specific environments were also identified. Pattern analysis allowed a sensible and useful summarization of GE interaction data set and helped to facilitate selecting superior genotypes for target-growing sites.

A systematic review of barriers and motivators to physical activity in elderly adults in Iran and worldwide

Soudabeh Yarmohammadi,Hossein Mozafar Saadati,Mohtasham Ghaffari,Ali Ramezankhani 한국역학회 2019 Epidemiology and Health Vol.41 No.-

OBJECTIVES: This study was conducted to identify and characterize the barriers and motivations to physical activity (PA) for elderly adults in Iran and other countries. METHODS: We searched 6 databases (PubMed, Embase, Scopus, Web of Science, Magiran, and the Scientific Information Database) from 2000 to the November 2017, using “aged 60 and over,” “physical activity” or “exercise,” and “motivator” and “barrier” as keywords. Two reviewers independently performed the search, screening, and quality assessment of the studies. RESULTS: In total, 34 papers were finally included in the study. The most important barriers, based on the frequency of factors, included physical problems, having no companions, and physical barriers to walking. The motivators included improving one’s physical condition, being social, and suitability of the physical environment. CONCLUSIONS: Important motivators and barriers to PA were more closely related to intrapersonal factors than to the interpersonal and environmental domains. The barriers and motivators to PA in the elderly were not markedly different between Iran and other countries. Therefore, a general strategy could be designed to improve PA in the elderly.

Template-oriented synthesis of hydroxyapatite nanoplates for 3D bone printing

Doustkhah, Esmail,Najafi Zare, Reza,Yamauchi, Yusuke,Taheri-Kafrani, Asghar,Mohtasham, Hamed,Esmat, Mohamed,Ide, Yusuke,Fukata, Naoki,Rostamnia, Sadegh,Sadeghi, Morteza H.,Assadi, M. Hussein N. Royal Society of Chemistry 2019 Journal of Materials Chemistry B Vol. No.

<P>The design of hydroxyapatite (HA) nanoarchitecture is critical for fabricating artificial bone tissues as it dictates the biochemical and the mechanical properties of the final product. Herein, we incorporated a simple hard-template approach to synthesise single crystal nanoplates of HA. We used the 2D graphitic nitride (g-C3N4) material to prepare an HA sol-gel under hydrothermal conditions. A new HA nanostructure was then formed during the calcination and removal of g-C3N4 at a higher temperature, which finally led to the production of nanoplates (thickness of ∼100 nm) while in lateral dimension the average size was in the micrometre scale. We characterised the synthesised HA nanoplates with XRD, TEM, and HRTEM. The theoretically predicted nanostructure construction based on Wulff's method is in full agreement with the experimental observations. We then prepared different weight ratios of HA and polylactic acid (PLA) composites for artificial 3D bone fabrication. The strong interaction between PLA and HA's (110) facet, which was the second most prevalent, resulted in the composite's mechanical robustness. After mechanical testing, an optimum ratio was selected for biological studies and 3D printing. Biological experiments demonstrated that the synthesised composite had excellent viability <I>in vitro</I>.</P>

Measuring Catastrophic Costs in Families Facing Traumatic Brain Injury in Iran

Elham Gheysvandi,Seyedeh Zahra Mohammadi,Mahdiyeh Najafpour Amirkiyasar,Enayatollah Homaie Rad,Leila Kouchakinejad-Eramsadati,Zahra Mohtasham-Amiri 대한신경손상학회 2023 Korean Journal of Neurotrauma Vol.19 No.1

Traumatic brain injury (TBI) is preventable and expensive. The medical costs of TBI can be too high for some households and might lead to poverty, malnutrition, and loss of assets, which are called catastrophic expenditures. In this study, we investigated the incidence of catastrophic costs associated with TBI caused by road accidents in a province in northern Iran.