The Effect of Melanocyte Stimulating Hormone and Hydroxyapatite on Osteogenesis in Pulp Stem Cells of Human Teeth Transferred into Polyester Scaffolds

Marziyeh Aghazadeh,Mohammad Samiei,Vahideh Raeisdasteh Hokmabad,Effat Alizadeh,Neda Jabbari,Alexander Seifalian,Roya Salehi 한국섬유공학회 2018 Fibers and polymers Vol.19 No.11

Presently, tissue engineering is employed in the restoration and repair of tissue defects. Degradable scaffolds, stem cells and stimulating factors are employed in this method. In this study, the effect of melanocyte-stimulating hormone (MSH) and/or hydroxyapatite (HA) on proliferation, osteoblast differentiation, and mineralization of human dental pulp stem cells (hDPSCs) seeded on PLLA-PCL nanofibrous scaffolds was evaluated. For this aim, PLLA-PCL-HA nanofibrous scaffolds were fabricated using electrospinning method. FE-SEM images exhibited that all nanofibers had bead-free morphologies with average diameters ranging from 150-205 nm. Human DPSCs seeded into PLLA-PCL nanofibers were treated with MSH. Cell viability, proliferation, morphology, osteogenic potential, and the expression of tissue-specific genes were assessed by means of MTT assay, FE-SEM, alizarin red S staining, and RT-PCR analysis. hDPSCs exhibited improved adhesion and proliferation capacity on the PLLA-PCL-HA nanofibers treated with MSH compared to other groups (p<0.05). Additionally, PLLA-PCL-HA nanofibers treated with MSH exhibited significantly higher mineralization and alkaline phosphatase activity than other groups. RT-PCR results confirmed that PLLA-PCL-HA nanofibers enriched with MSH could significantly unregulated the gene expression of BMP2, osteocalcin, RUNX2 and DSPP that correlated to osteogenic differentiation (p<0.05). Based on results, incorporation of HA nanoparticles in PLLA-PCL nanofibers and addition of MSH in media exhibited synergistic effects on the adhesion, proliferation, and osteogenesis differentiation of hDPSCs, and therefore assumed to be a favorable scaffold for bone tissue engineering applications.

Calcium molybdate octahedral nanostructures, hierarchical self-assemblies controllable synthesis by coprecipitation method: Characterization and optical properties

Marziyeh Ghaed-Amini,Mehdi Bazarganipour,Masoud Salavati-Niasari 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1

Calcium molybdate nanostructures have been successfully prepared via coprecipitation approach byutilizing Ca(Sal)2 (Sal = salicylidene) and ammonium heptamolybdate ((NH4)6Mo7O24 4H2O) as startingmaterials in water as solvent. The products were characterized by Fourier transform infrared (FT-IR)spectra, X-ray diffraction (XRD), energy dispersive X-ray microanalysis (EDX), photoluminescence (PL)spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Theeffects of temperature, reaction time, solvent, surfactant, calcium source and pH were considered toobtain optimum condition. It was established that morphology, particle size and phase of the finalproducts could be extremely affected via these parameters. It revealed that utilizing of water as solventand NH3 as the base, provided octahedral and hierarchical self-assemblies nanostructures, respectively.

Design and Evaluation of Reform Plan for Local Academic Nursing Challenges Using Action Research

Marziyeh Asadizaker,Zhila Abed_Saeedi,Heidarali Abedi,Azadeh Saki 한국간호과학회 2016 Asian Nursing Research Vol.10 No.4

Purpose: This study identifies challenges to the first nurse training program for undergraduate nursing students at a nursing and midwifery school in Iran using a collaborative approach in order to improve the program. Methods: Action research was used as a research strategy with qualitative content analysis and quantitative evaluation. The participants were 148 individuals from nursing academic and clinical settings, including administrators, faculty members, students, and staff nurses. We obtained approval from the research deputy and ethics committee of Shahid Beheshti University of Medical Sciences in Tehran, Iran for this study. Results: Lack of coherence in the educational program and implementation of the program, inadequate communication between management inside and outside the organization, insufficient understanding of situations by students, and improper control of inhibitors and use of facilitators in teaching and in practice were among the major challenges in the first training process in the context of this study. After classification of problems, the educational decision-making authorities of the school developed an operational program with stakeholder cooperation to plan initial reforms, implementation of reforms, reflection about the actions, and evaluation. Comparison of student satisfaction with the collaborative learning process versus the traditional method showed that except for the atmosphere in the clinical learning environment (p > .05), the mean differences for all dimensions were statistically significant. Conclusions: The results confirm the overall success of the revised partnership program, but stressed the need for further modification of some details for its implementation in future rounds.

The Effect of Teaching English Language on Tourism Development

Marziyeh Khalilizadeh Ganjalikhani 세계문화관광학회 2011 Conference Proceedings Vol.12 No.-

Regarding tourism function in economy countries competition over attracting more tourists the effect of the industry on improving the social and cultural knowledge of people and its influence on urban development paying more attention to quality improving factors for attracting tourist seems to be of more importance now since these factors will lead to attracting more tourists. Establishing proper relation with tourists and providing the condition for good verbal communication are of factors that can be considered effective on improving the quality of services offered to tourists; moreover these factors will help the tourism attractions of an area to become more known and noticed. To achieve this English Language as the international language will have a significant role.

Fabrication and Characterization of Antibacterial Suture Yarns Containing PLA/Tetracycline Hydrochloride-PVA/Chitosan Nanofibers

Marziyeh Ranjbar-Mohammadi,Vida Sa’di,Meysam Moezzi,Reza Saghafi 한국섬유공학회 2022 Fibers and polymers Vol.23 No.6

Antibacterial suture yarns containing antibiotic drugs can play an important role in preventing the infection andholding tissues together to achieve wound closure. In this research, the possibility of production drug loaded nano yarns froma mixture of chitosan/polyvinyl alcohol (PVA/CS) (70:30) and poly(lactic acid) (PLA) was assessed by combiningdual‐electrospinning technique with aligned fibers collection. For this, CS/PVA solution was injected from one syringe andPLA from another one. The effect of weight ratio of PLA-PVA/CS (100:0, 80:20 and 60:40), collector speed (500, 800,1100 rpm) and voltage (10, 15 and 20 kV) on the diameter and morphology of fabricated nanofibers was assessed. Fabricatednanofibers with the length of 70 cm were twisted for manufacturing suture yarns. The results showed that fabrication ofstructure with the finest diameter was possible with the weight ratio of PLA-PVA/CS (60:40), the applied voltage of 15 kV,spinning distance of 17 cm and the rotational speed of about 1100 rpm. The diameter of produced nanofibers in this conditionwas about 290±42 nm. Then, tetracycline hydrochloride (T) loaded PLA-PVA/CS nanofibers (PLA/T-PVA/CS) wereproduced with optimum condition and the drug (5 wt. %) was loaded in PLA solution. FTIR analysis of drug loaded yarnexhibited the most important functional groups of chitosan, PVA, tetracycline hydrochloride and PLA in PLA-PVA/CSstructure. Contact angle data for PLA-PVA/CS and PLA/T-PVA/CS was about 89±3 ° and 30±2 °, respectively. The result ofthe antibacterial test indicated that the PLA/T-PVA/CS nanofibrous yarns were the most suitable sample with the prominentantibacterial activity against both gram-positive bacterium Staphylococcus aureus and gram-negative bacterium Escherichiacoli with inhibition zones of 17.5 and 20 mm, respectively. It seems that the fabricated nanofiber based yarns with suitablemorphological characteristics, hydrophilicity nature, and prevention of the surgical infections without affecting the cellviability can be an excellent structure for utilization as suture yarn.

Dynamic Optimization of Capital Stock: An Application of Maximum Principle

Marziyeh Esfandiari 대한산업공학회 2020 Industrial Engineeering & Management Systems Vol.19 No.3

Determining the optimized level of economic variables is very influential in compiling economic plans and policies. This study deals with the determination of the country’s optimized capital stock by the use of Pontryagin’s Maximum Principle in the time period 1972-2017. The product function is assumed as Cobb-Douglas, and the coefficients of product function are measured by Eviews software. After that, the achieved differential equation applying from Maximum Principle is solved by the use of numerical methods via MATLAB software. Then, under certain hypotheses about the rate of depreciation and the ratio of savings, the optimized capital stock is calculated and is compared to the real ones. Findings of the study approve that there are big gaps between the existing situation and the optimized capital stock in Iran. In order to decrease the gap, it is urgent to increase investment and take policies for provoking the private sectors.

Religion and the Women's Movement in Iran

Marziyeh BAKHSHIZADEH 이화여자대학교 아시아여성학센터 2012 이화여자대학교 아시아여성학센터 학술대회자료집 Vol.2012 No.7

Life table parameters of Glyphodes pyloalis Walker (Lep.: Pyralidae) on four varieties of mulberry Morus alba L. (Moraceae)

Marziyeh Oftadeh,Jalal Jalali Sendi,Roya Khosravi 한국응용곤충학회 2015 Journal of Asia-Pacific Entomology Vol.18 No.2

Lesser mulberry pyralid, Glyphodes pyloalis Walker, is a monophagous pest of mulberry and has recently been reported from northern Iran. The effect of four varieties of mulberry Morus alba L. (Ichinose, Shin Ichinose, Kenmochi and Mahalii) on the life table parameters and biological characteristics of G. pyloalis Walker, was studied at 24 ± 1 °C, relative humidity of 75 ± 5% and a photoperiod of 16: 8 (L: D) h. The developmental time of immature stages was longest on Kenmochi being 37.6 days. The intrinsic rate of increase (rm) was significantly affected by various mulberrys being the highest on Mahalii (0.160) and the lowest on Kenmochi (0.127). The highest and lowest finite rates of increase (λ) were observed on Mahalii 1.174 and Kenmochi 1.136, respectively. The highest amount of gross reproductive rate and the lowest mean generation time (T) was observed on Mahalii. The results obtained in this study indicated that Mahalii appeared to be the most susceptible host to G. pyloalis among the tested varieties.

Colocalization of generalized local homology modules

Marziyeh Hatamkhani 대한수학회 2022 대한수학회보 Vol.59 No.4

Let $R$ be a commutative Noetherian ring and $I$ an ideal of $R$. In this paper, we study colocalization of generalized local homology modules. We intend to establish a dual case of local-global principle for the finiteness of generalized local cohomology modules. Let $M$ be a finitely generated $R$-module and $N$ a representable $R$-module. We introduce the notions of the representation dimension $r^I (M, N)$ and artinianness dimension $a^I (M, N)$ of $M,N$ with respect to $I$ by $r^I (M, N)= \inf\{i\in \mathbb{N}_0 : H^I_i(M,N) \text{ is not representable}\}$ and $a^I (M, N)= \inf\{i\in \mathbb{N}_0 : H^I_i(M,N)\text{ is not artinian}\}$ and we show that $a^I (M, N)=r^I (M, N)$ $=\inf\{r^{IR_{\fp}}(M_{\fp},_{\fp}N) : \fp\in \Spec(R)\}\geq \inf\{a^{IR_{\fp}}(M_{\fp},_{\fp}N) : \fp\in \Spec(R)\}$. Also, in the case where $R$ is semi-local and $N$ a semi discrete linearly compact $R$-module such that $N/\bigcap_{t>0} I^tN$ is artinian we prove that $\inf\{i: H^I_i(M,N) \text{ is not minimax}\}\!=\!\inf\{r^{IR_{\fp}}(M_{\fp},_{\fp}N) : \fp\in \Spec(R)\setminus\Max(R)\}.$

Prevalence of burnout and related factors in nursing faculty members: a systematic review

Marziyeh Hosseini,Mitra Soltanian,Camellia Torabizadeh,Zahra Hadian Shirazi 한국보건의료인국가시험원 2022 보건의료교육평가 Vol.19 No.-

Purpose The current study aimed to identify the prevalence of burnout and related factors in nursing faculty members through a systematic review of the literature. Methods A comprehensive search of electronic databases, including Scopus, PubMed, Web of Science, Iranmedex, and Scientific Information Database was conducted via keywords extracted from Medical Subject Headings, including burnout and nursing faculty, for studies published from database inception to April 1, 2022. The quality of the included studies in this review was assessed using the appraisal tool for cross-sectional studies. Results A total of 2,551 nursing faculty members were enrolled in 11 studies. The mean score of burnout in nursing faculty members based on the Maslach Burnout Inventory (MBI) was 59.28 out of 132. The burnout score in this study was presented in 3 MBI subscales: emotional exhaustion, 21.24 (standard deviation [SD]=9.70) out of 54; depersonalization, 5.88 (SD=4.20) out of 30; and personal accomplishment, 32.16 (SD=6.45) out of 48. Several factors had significant relationships with burnout in nursing faculty members, including gender, level of education, hours of work, number of classroom, students taught, full-time work, job pressure, perceived stress, subjective well-being, marital status, job satisfaction, work setting satisfaction, workplace empowerment, collegial support, management style, fulfillment of self-expectation, communication style, humor, and academic position. Conclusion Overall, the mean burnout scores in nursing faculty members were moderate. Therefore, health policymakers and managers can reduce the likelihood of burnout in nursing faculty members by using psychosocial interventions and support.