연구에서의 성별과 젠더 형평성: SAGER(Sex and Gender Equity in Research) 지침의 근거 및 이용방법

Shirin Heidari,Thomas F. Babor,Paola De Castro,Sera Tort,Mirjam Curno5 Ewha Womans University School of Medicine 2024 EMJ (Ewha medical journal) Vol.47 No.1

Effect of GLUMA desensitizer on the retention of full metal crowns cemented with Rely X U200 self-adhesive cement.

Shirin Lawaf,Ezatallah Jalalian,Roshanak Roshan,Arash Azizi 대한치과보철학회 2016 The Journal of Advanced Prosthodontics Vol.8 No.5

PURPOSE. Considering the importance of retention in the success and long-term clinical service of fixed partial dentures (FPDs) as well as the existing controversy regarding the effect of GLUMA desensitizer on the retention of full metal crowns cemented with RelyX U200 self-adhesive cement, this study aimed to assess the effect of GLUMA desensitizer on the retention of full metal crowns cemented using RelyX U200. MATERIALS AND METHODS. In this experimental study, 20 sound human premolars were prepared; a 0.5 mm chamfer finish line was prepared above the cementoenamel junction. The teeth were randomly assigned to two groups: a desensitizer group (n = 10, treated with GLUMA desensitizer) and a control (n = 10, no surface treatment). Full metal crowns were fabricated of base metal alloy and had a ring. All crowns were cemented with RelyX U200 and subjected to retention test by using a universal testing machine. The data were analyzed using SPSS version 20 and independent t-test. RESULTS. The mean tensile bond strength was significantly higher in the GLUMA desensitizer group (230.63 ± 63.8 N) compared to the control group (164.45 ± 39.3 N) (P≤.012). CONCLUSION. GLUMA desensitizer increases the tensile bond strength of RelyX U200 self-adhesive cement to dentin.

Morphological and genetic variation of thirty Iranian Dendranthema (Dendranthema grandiflfl orum) cultivars using multivariate analysis

Shirin Taghipour,Abdollah Ehtesham Nia,Hamed Khodayari,Hasan Mumivand,Mohammad Reza Shafiei 한국원예학회 2021 Horticulture, Environment, and Biotechnology Vol.62 No.3

Analysis of genetic diversity in dendranthema is necessary to improve this important ornamental species. In this study, 30Dendranthema grandifl ora cultivars were assessed based on 21 phenotypic traits and 13 ISSR loci based on a completelyrandomized block design with three replications in Iran. Phenotypic traits such as plant height, lateral branch number, leafnumber, leaf area, and fl ower number had high (i.e., > 45%) phenotypic and genotypic coeffi cients of variation, indicatingthe potential of these traits for improving through targeted selection in breeding programs. All of the ISSR markers werepolymorphic, and 86 alleles were identifi ed across the cultivars. The average polymorphic information content was 0.35with a Shannon’s information index of 0.29, indicating high levels of genetic variation in the tested cultivars. The clusteranalysis based on Jaccard similarity indices (J) grouped 30 genotypes into 10 major clusters. The closest relation wasobserved between the ‘Oran’ and ‘Taban3′ cultivars (with 91% similarity), while ‘Fariborz’ and ‘Farahnaz’ cultivars werefar apart from others (with 38% similarity). All cultivars were clearly diff erentiated by their ISSR fi ngerprints. T(GA)9 and(AGC)5GA markers had the highest molecular indices, which could be used for future breeding programs of dendranthema. Eleven cultivars were classifi ed separately into four groups (A–D), and the remaining 19 cultivars were placed in the otherfour groups (E–H). The fi ndings of this study will aid in parental selection studies for hybridization programs of dendranthemain future.

An unusual cause for trismus caused by mandibular coronoid osteoma : a case report

Shirin Vashishth,Kanika Garg,Venkatraman Sreenivasan 대한구강악안면방사선학회 2013 Imaging Science in Dentistry Vol.43 No.1

Osteoma is a dense bony proliferation of otherwise normal membranous bone. This tumor is essentially restricted to the craniofacial skeleton and is rarely diagnosed in other bones. The mandible and the paranasal sinuses are the most common sites, while the involvement of the coronoid process has been reported in only 6 cases so far. This report demonstrated a case of osteoma occurring at the mandibular coronoid process in a 26-year-old female patient. The patient was managed with surgical resection of the osteoma followed by physiotherapy.

Gram Scale and Room Temperature Functionalization of Boron Nitride Nanosheets for Water Treatment

Shirin Daneshnia,MOHSEN ADELI,Yaghoub Mansourpanah 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.8

Two-dimensional hexagonal boron nitride is a fascinating nanomaterial with a broad range of potential applications. However, further development of this nanomaterial is hampered because of its poor functionality and low processability. One of the efficient strategies for improving the processability of two-dimensional hexagonal boron nitride is the covalent functionalization of this nanomaterial. In this study, we report on a straightforward approach for functionalization of two-dimensional hexagonal boron nitride by lithium cyclopentadienyl and its application for water treatment. Cyclopentadienyl-functionalized boron nitride was characterized by different spectroscopy and microscopy methods as well as thermal and BET analysis. The synthesized nanomaterial was able to efficiently remove methylene blue from water in a short time. Adsorption capacity of this nanomaterial was as high as 476.3 mg/g, which was superior to the non-functionalized boron nitride. Our results showed that cyclopentadienyl-functionalized boron nitride is a promising candidate for the removal of cationic pollutants from water.

Comparison of the bond strength of ceramics to Co-Cr alloys made by casting and selective laser melting

Shirin Lawaf,Shahbaz Nasermostofi,Mahtasadat Afradeh,Arash Azizi 대한치과보철학회 2017 The Journal of Advanced Prosthodontics Vol.9 No.1

PURPOSE. Considering the importance of metal-ceramic bond, the present study aimed to compare the bond strength of ceramics to cobalt-chrome (Co-Cr) alloys made by casting and selective laser melting (SLM). MATERIALS AND METHODS. In this in-vitro experimental study, two sample groups were prepared, with one group comprising of 10 Co-Cr metal frameworks fabricated by SLM method and the other of 10 Co-Cr metal frameworks fabricated by lost wax cast method with the dimensions of 0.5 × 3 × 25 mm (following ISO standard 9693). Porcelain with the thickness of 1.1 mm was applied on a 3 × 8-mm central rectangular area of each sample. Afterwards, bond strengths of the samples were assessed with a Universal Testing Machine. Statistical analysis was performed with Kolmogorov-Smirnov test and T-test. RESULTS. Bond strength in the conventionally cast group equaled 74.94 ± 16.06 MPa, while in SLM group, it equaled 69.02 ± 5.77 MPa. The difference was not statistically significant (P ≤ .05). CONCLUSION. The results indicated that the bond strengths between ceramic and Co-Cr alloys made by casting and SLM methods were not statistically different.

Antibiotic Susceptibility Evaluation of Group A Streptococcus Isolated from Children with Pharyngitis: A Study from Iran

Shirin Sayyahfar,Alireza Fahimzad,Amir Naddaf,Sara Tavassoli 대한감염학회 2015 Infection and Chemotherapy Vol.47 No.4

Background: The aim of this study was to evaluate the antibiotic susceptibility of Group A streptococcus (GAS) to antibiotics usually used in Iran for treatment of GAS pharyngitis in children. Materials and Methods: From 2011 to 2013, children 3-15 years of age with acute tonsillopharyngitis who attended Mofid Children’s Hospital clinics and emergency ward and did not meet the exclusion criteria were enrolled in a prospective study in a sequential manner. The isolates strains from throat culture were identified as GAS by colony morphology, gram staining, beta hemolysis on blood agar, sensitivity to bacitracin, a positive pyrrolidonyl aminopeptidase (PYR) test result, and the presence of Lancefield A antigen determined by agglutination test. Antimicrobial susceptibility was identified by both disk diffusion and broth dilution methods. Results: From 200 children enrolled in this study, 59 (30%) cases were culture positive for GAS. All isolates were sensitive to penicillin G. The prevalence of erythromycin, azithromycin, and clarithromycin resistance by broth dilution method was 33.9%, 57.6%, and 33.9%, respectively. Surprisingly, 8.4% of GAS strains were resistant to rifampin. In this study, 13.5% and 32.2% of the strains were resistant to clindamycin and ofloxacin, respectively. Conclusion: The high rate of resistance of GAS to some antibiotics in this study should warn physicians, especially in Iran, to use antibiotics restrictedly and logically to prevent the rising of resistance rates in future. It also seems that continuous local surveillance is necessary to achieve the best therapeutic option for GAS treatment.

ENERGENT: An Energy-Efficient UAV-Assisted Fog-IoT Framework for Disaster Management

Shirin Abkenar, Forough,Iranmanesh, Saeid,Bouguettaya, Athman,Raad, Raad,Jamalipour, Abbas 한국통신학회 2022 Journal of communications and networks Vol.24 No.6

In this paper, we propose ENergy-efficient disastERmanaGmENT (ENERGENT) as a novel framework for disastermanagement in the unmanned aerial vehicle (UAV)-assisted Fog-Internet of things (IoT) networks. ENERGENT optimizes theenergy consumption of the terminal nodes (TNs), as well asthe UAVs, using three proposed algorithms. The first algorithmoptimally adjusts the 3D placement of the UAVs such that thesenodes consume the minimum energy to reach the desired clusterof the TNs. Besides, the transmit power and the transmissionrate of the TNs are set in a way that their energy consumptionis minimized and the outage probability requirements are metin the network. In the second algorithm, we propose an optimaltask offloading scheme where tasks are offloaded to the UAVsin order to meet the network delay constraints. Finally, thethird algorithm takes advantage of wireless power transfer totransfer energy to the TNs when their remaining energy degradesa predefined threshold. This scheme guarantees a minimumthroughput for all TNs within a cluster by which the totalnetwork throughput is maximized. Simulation results revealthat ENERGENT outperforms the existing methods in terms ofoptimized network energy consumption, delay, and throughput.

Expression Levels of Vascular Endothelial Growth Factors A and C in Patients with Peptic Ulcers and Gastric Cancer

Shirin Taghizadeh,Mojtaba Sankian,Abolghasem Ajami,Mohsen Tehrani,Nasim Hafezi,Rajeeh Mohammadian,Touraj Farazmandfar,Vahid Hosseini,Ali Abbasi,Maryam Ajami 대한위암학회 2014 Journal of gastric cancer Vol.14 No.3

Purpose: Vascular endothelial growth factor (VEGF) is one of the most important growth factors for metastatic tumors. To clarify the roleof VEGF-A and C in patients with peptic ulcer disease (PUD) or gastric cancer (GC), we evaluated the expression levels of these two molecules. We also analyzed the effect of Helicobacter pylori infection on VEGF-A and C expression levels. Materials and Methods: Patients with dyspepsia who needed diagnostic endoscopy were selected and divided into three groups: nonulcerdyspepsia (NUD), PUD, and GC, according to their endoscopic and histopathological results. Fifty-two patients with NUD, 50 withPUD, and 38 with GC were enrolled in this study. H. pylori infection was diagnosed by the rapid urease test. After RNA extraction andsynthesis of cDNA, the expression levels of VEGF-A and C were determined by quantitative reverse transcriptase polymerase chain reaction. Results: The VEGF-C expression level in the PUD and GC groups was significantly higher than that in the NUD group. Moreover, theVEGF-A expression level in the PUD and GC groups was higher than in the NUD group, although the differences were not statisticallysignificant. Significant positive correlations were also observed between the expression levels of these two molecules in the PUD and GCgroups. In addition, the expression levels of these two molecules were higher in H. pylori positive patients with PUD or GC than in H. pylori negative patients of the same groups; however, these differences did not reach statistical significance. Conclusions: Up-regulation of VEGF-C expression during gastric mucosal inflammation may play a role in the development of peptic ulcersor GC.

Commercial tree products modeling case study in Gorazbon district, Kheyroud Forest, Iran

Shirin Varkouhi,Manoochehr Namiranian,Meghdad Joorgholami 한국산림과학회 2017 Forest Science And Technology Vol.13 No.2

Reliable yield predictions are essential for sustainable forest management, with the quality of forest management plans hinging on the reliability of growth and yield predictions. Due to lack of both efficient harvest plans and product models in Hyrcanian forests, these requirements have implications for model design, implementation, and use. This study aims to estimate the percentage of different industrial products for oriental beech (Fagus orientalis Lipsky) and hornbeam (Carpinus betulus L.) at the Kheyroud Forest Research Station located in the Caspian forests of northern Iran. For this purpose at first enhancement in accuracy of district’s tariff tables were done by new clues from a new inventory. In order to determine the relation between product percentages and diameter at breast height (DBH), a set of models extracted to help forest managers predict when, where, and how much timber of hornbeam and oriental beech in each diameter class can be harvested. The results showed logs to be the most important output, reaching a peak at 100 and 115 cm diameter classes in both species, versus Bolt grade 1 & 2 reaching a minimum in these diameter classes behave conversely due to decay and harrow stems. The result of validation showed high accuracy of models in predicting commercial tree species products. In general the model is considered suitable for implementation in integrated forest sector modeling.