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Arrested pneumatization of the sphenoid sinus mimicking intraosseous lesions of the skull base
Elnaz Jalali,Aditya Tadinada 대한영상치의학회 2015 Imaging Science in Dentistry Vol.45 No.1
Arrested pneumatization of the sphenoid sinus is a developmental variant that is not always well recognized and is often confused with other pathologies associated with the skull base. This report describes the case of a patient referred for cone-beam computed tomography (CBCT) imaging for dental implant therapy. CBCT demonstrated a well-defined incidental lesion in the left sphenoid sinus with soft tissue-like density and sclerotic borders with internal curvilinear opacifications. The differential diagnoses included intraosseous lipoma, arrested pneumatization of the sphenoid sinus, chondrosarcoma, chondroid chordoma, and ossifying fibroma. The radiographic diagnosis of arrested pneumatization was based on the location of the lesion, its well-defined nature, the presence of internal opacifications, and lack of expansion. Gray-scale CBCT imaging of the area demonstrated values similar to fatty tissue. This case highlighted the fact that benign developmental variants associated with the skull base share similar radiographic features with more serious pathological entities.
Mitochondrial DNA 4977-bp deletion in endometriosis
Elnaz Salahi,Zivar Salehi,Ziba Zahiri,Saeedeh Sadri,Niloofar Khoshdel Rad 한국유전학회 2013 Genes & Genomics Vol.35 No.5
Endometriosis is a multifactorial gynecological condition characterized by the presence of ectopic endometrial and stromal tissue outside the uterus. Free radicals and Oxidative stress have been proposed to be involved in the pathogenesis of the endometriosis. It has been shown that mitochondrial DNA (mtDNA) is particularly susceptible to oxidative damage and mutations due to the high rate of reactive oxygen species production and limited DNA repair capacity in mitochondria. While a number of deletions can occur, the most commonly studied in human is a 4977-bp deletion that removes all or parts of the genes for NADH dehydrogenase subunits 3, 4, 4L and 5, cytochrome C oxidase subunit III and ATP synthase subunits 6 and 8.’’ We evaluated whether mtDNA common deletion is related with the susceptibility to endometriosis in northern Iran. In this study 80 endometriosis cases and 100 controls were enrolled. Total DNA was extracted from endometrial tissue samples. The mitochondrial common deletion was determined by Gap- polymerase chain reaction (Gap-PCR). It was found that the mitochondrial common deletion was more likely to be present in patients with endometriosis. Assessing indicate that 60 % of patients and 8 % of controls show mtDNA 4977-bp deletion (Odds Ratio [OR] = 17.25, P\0.0001, confidence interval [CI] = 5.18–57.36). The mtDNA 4977 deletion may play a role in endometriosis. Further studies with larger numbers of patients are required for further evaluation and confirmation of our finding.
Elnaz Talebi,Mahmood Md Tahir,Farshad Zahmatkesh,Ahmad B.H. Kueh 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.19 No.3
Buckling Restrained Braces (BRB) have been widely used in the construction industry as they utilize the most desirable properties of both constituent materials, i.e., steel and concrete. They present excellent structural qualities such as high load bearing capacity, ductility, energy-absorption capability and good structural fire behaviour. The effects of size and type of filler material in the existed gap at the steel core-concrete interface as well as the element's cross sectional shape, on BRB's fire resistance capacity was investigated in this paper. A nonlinear sequentially-coupled thermal-stress three-dimensional model was presented and validated by experimental results. Variation of the samples was described by three groups containing, the steel cores with the same cross section areas and equal yield strength but different materials (metal and concrete) and sizes for the gap. Responses in terms of temperature distribution, critical temperature, heating elapsed time and contraction level of BRB element were examined. The study showed that the superior fire performance of BRB was obtained by altering the filler material in the gap from metal to concrete as well as by increasing the size of the gap. Also, cylindrical BRB performed better under fire conditions compared to the rectangular cross section.
Elnaz Khadivinia,Hakimeh Sharafi,Faranak Hadi,Hossein Shahbani Zahiri,Sima Modiri,Azadeh Tohidi,Amir Mousavi,Ali Hatef Salmanian,Kambiz Akbari Noghabi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
In this study, biosorption of cadmium (II) ions from aqueous solutions by a glyphosate degradingbacterium, Ochrobactrum sp. GDOS, was investigated in batch conditions. The isolate was able to utilize3 mM GP as the sole phosphorous source, favorable to bacterium growth and survival. The effect ofdifferent basic parameters such as initial pH, contact time, initial concentrations of cadmium ion andtemperature on cadmium uptake was evaluated. The adsorption process for Cd (II) is well fitted withLangmuir adsorption isotherm. Experimental data were also tested in terms of biosorption kinetics usingpseudo-first-order and pseudo-second-order kineticmodels. Maximummetal uptake qmax was obtainedas 83.33 mg g1. The sorption process of cadmium onto the Ochrobactrum sp. GDOS biomass followedsecond-order rate kinetic (R2 = 0.9986). A high desorption efficiency was obtained in pH 2. Reusability ofthe biomass was examined under successive biosorption–desorption cycle repeated thrice. Thecharacteristics of the possible interactions between biosorbent and metal ions were also evaluated byscanning electron microscope (SEM), Fourier transform infrared (FT-IR) and X-ray diffraction analysis.
Elnaz Asgharkhani,Anahita Fathi Azarbayjani,Shiva Irani,Mohsen Chiani,Zahra Saffari,Dariush Norouzian,Azim Akbarzadeh,Seyed Mohammad Atyabi 한국약제학회 2018 Journal of Pharmaceutical Investigation Vol.48 No.3
Artemisinin (ART)-loaded niosome and pegylated niosomes were prepared using two different techniques. Nanosized lipid vesicles were physically characterized for entrapment efficacy and stability. Particle sizes were determined and release kinetic of the optimized formulation was carried out by dialysis method. The efficacy of the developed formulation was tested on MCF7 cells and cytotoxicity was accomplished by MTT assay. Common observation was the effect of pegylation on the reduction of vesicle size due to its hydrophilic nature. Span 60 niosomes had slightly larger vesicle size than Span 20 niosomes. Over all the good stability was observed over 60 days. In vitro drug release studies indicate gradual release of niosome over 40 h. similar trend in drug release was observed for most formulation except for the multilammellar pegylated niosomes. Pegylation of niosomes causes increased stability and efficacy of ART. Cytotoxicity ( IC50) was evaluated at different time of incubation at 48 and 72 h for selected niosomal formulations. Pegylated ART niosomes show great advantages in term of interaction with MCF-7 cell membrane. Results suggest that pegylated niosomes may be an appropriate candidate for the clinical administration of ART.
Squamous cell carcinoma arising within a maxillary odontogenic keratocyst: A rare occurrence
Elnaz Jalali,Elie M. Ferneini,Kandasamy Rengasamy,Aditya Tadinada 대한영상치의학회 2017 Imaging Science in Dentistry Vol.47 No.2
Squamous cell carcinoma (SCC) arising within the lining of an odontogenic keratocyst (OKC) is a rare occurrence. Although potentially locally destructive, OKC is a benign odontogenic process that typically presents with clinical and radiographic features characteristic of a benign intraosseous neoplasm. We present the clinical and radiographic features of a maxillary mass that demonstrated SCC arising from the lining of an OKC. Although the initial clinical and radiographic presentation suggested an infection or malignant neoplasm, biopsies revealed an infiltrative welldifferentiated SCC contiguous with and arising from the focus of a pre-existing OKC. The patient subsequently underwent a type II hemi-maxillectomy with neoadjuvant chemoradiation. This report discusses the clinical and radiographic features associated with intraosseous malignancies, especially those arising from an otherwise benign odontogenic lesion. While the majority of OKCs are benign, the current report illustrates the potential for carcinomatous transformation within the lining of an OKC.
G-vector-valued Sequence Space Frames
Osgooei, Elnaz Department of Mathematics 2016 Kyungpook mathematical journal Vol.56 No.3
G-vector-valued sequence space frames and g-Banach frames for Banach spaces are introduced and studied in this paper. Also, the concepts of duality mapping and ${\beta}$-dual of a BK-space are used to define frame mapping and synthesis operator of these frames, respectively. Finally, some results regarding the existence of g-vector-valued sequence space frames and g-Banach frames are obtained. In particular, it is proved that if X is a separable Banach space and Y is a Banach space with a Schauder basis, then there exist a Y-valued sequence space $Y_v$ and a g-Banach frame for X with respect to Y and $Y_v$.
Squamous cell carcinoma arising within a maxillary odontogenic keratocyst: A rare occurrence
Jalali, Elnaz,Ferneini, Elie M.,Rengasamy, Kandasamy,Tadinada, Aditya Korean Academy of Oral and Maxillofacial Radiology 2017 Imaging Science in Dentistry Vol.47 No.2
Squamous cell carcinoma (SCC) arising within the lining of an odontogenic keratocyst (OKC) is a rare occurrence. Although potentially locally destructive, OKC is a benign odontogenic process that typically presents with clinical and radiographic features characteristic of a benign intraosseous neoplasm. We present the clinical and radiographic features of a maxillary mass that demonstrated SCC arising from the lining of an OKC. Although the initial clinical and radiographic presentation suggested an infection or malignant neoplasm, biopsies revealed an infiltrative well-differentiated SCC contiguous with and arising from the focus of a pre-existing OKC. The patient subsequently underwent a type II hemi-maxillectomy with neoadjuvant chemoradiation. This report discusses the clinical and radiographic features associated with intraosseous malignancies, especially those arising from an otherwise benign odontogenic lesion. While the majority of OKCs are benign, the current report illustrates the potential for carcinomatous transformation within the lining of an OKC.