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Search Results: 1 - 10 of 1815 matches for " Maryam Aghaloo "
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Three dimensional socket preservation: a technique for soft tissue augmentation along with socket grafting
Gholam Ali Gholami, Maryam Aghaloo, Farzin Ghanavati, Reza Amid, Mahdi Kadkhodazadeh
Annals of Surgical Innovation and Research , 2012, DOI: 10.1186/1750-1164-6-3
Abstract: We reviewed this technique through a case report and discuss it’s benefit in compare to other socket preservation procedures.The main advantages of RPC graft would be summarized as follows: stable primary closure during bone remodeling, saving or crating sufficient vestibular depth, making adequate keratinized gingiva on the buccal surface, and being esthetically pleasant.
Histologic and Histomorphometric Evaluation of Bone Substitutes in Experimental Defects
Golam Ali Gholami,Maryam Tehranchi,Mahdi Kadkhodazadeh,Anahita Ashoori Moghadam,Farzin Ghanavati,Mohammad Reza Talebi Ardakani,Maryam Aghaloo,Fatemeh Mashhadiabbas
Research Journal of Biological Sciences , 2012, DOI: 10.3923/rjbsci.2010.465.469
Abstract: Successful aesthetic and functional outcomes of any prosthetic reconstruction require an adequate and favorable ridge contour for proper pontic design and implant placement. Often the ridge needs to be reconstructed with bone substitutes. The aim of this study was to compare the quality and quantity of newly formed bone resulting from 3 different types of commercial bone substitutes (Bio-Oss , Bio-Gen , PTG ). About 6 round intrabony defects were made with a trephine bur on each of ten tibias. Each defect in each tibia (except one defect in each tibia which served as control) was randomly filled with a bone substitute with or without a resorbable collagen barrier membrane. The animals were euthanized after three months and the proximal part of the tibias containing the defects were prepared for histologic and histomorphometric evaluation. The mean percentage of new bone in the three groups with grafted material was higher than those without grafted material. The mean percentage of new bone and remaining soft tissue in the PTG group was similar to the Bio-Oss + collagen membrane group but the bone quality was better in the PTG group. Application of PTG does not interfere with the initial healing of the surgical wound.
Effects of periodontal treatment phase I on birth term and birth weight
Sadatmansouri S,Sedighpoor N,Aghaloo M
Journal of the Indian Society of Pedodontics and Preventive Dentistry , 2006,
Abstract: Considering the high prevalence of preterm birth (PTB) and low birth weight (LBW) and their complications as well as the role played by periodontal disease in their incidence and the lack of any report of periodontal therapy on these problems in Iran, the goal of the present research was to determine the effects of periodontal treatment on PLBW incidence among women with moderate or advanced periodontitis who were referred to Javaheri hospital (2004-2005). This clinical trial research was conducted on 30 pregnant women age ranging from 18-35 years old, with moderate or advanced periodontitis. Fifteen subjects randomly underwent the first phase of periodontal treatment including scaling, root planning and the use of 0.2% chlorhexidine mouth rinse for one week. None of these steps were taken for the controls. After necessary follow ups, the effect of periodontal treatment on birth term and birth weight were analyzed statistically. This research was conducted on 30 subjects, 15 controls and 15 cases in study group. In the control group, the observed rate of PLBW was 26.7% whereas among periodontally treated group, phase I, PLBW infant was not observed ( P < 0.05). Infants birth weight were (3059.3-389.7) gms in study group and (3371-394.2) gms in the control group and respectively ( P < 0.05). Periodontal therapy, phase I, results in a reduction in PLBW incidence rate. Therefore, the application of such a simple method among periodontally diseased pregnant women is recommended.
The Effects of Collective Leadership on Student Achievement and Teacher Instruction  [PDF]
Maryam Awadh
Open Journal of Leadership (OJL) , 2018, DOI: 10.4236/ojl.2018.74015
Abstract: In the past, the leadership position primarily involved how leaders handled their role. The notion of collective leadership is significant for constructing the educational community and sustaining inclusive collective participation. This paper shows the framework of the leadership, and comprehensively addresses the ways in which leaders have a direct impact on classroom instruction and student learning outcomes. The study outlines how leadership abilities are linked to student achievement and illustrates how principals and instructional leaders are the central figures of this leadership. The study found the ways in which leaders indirectly influence student achievement through their impact on teacher motivation and work conditions, and whether teachers’ knowledge and skills have an effect on student achievement in the educational system. The influences of collective leadership on classroom instruction were examined, including ways in which changes in instruction could influence both teachers and students.
Application of quartz crystal nanobalance in conjunction with a net analyte signal based method for simultaneous determination of leucine, isoleucine and valine  [PDF]
Maryam Shojaei, Abdolreza Mirmohseni, Maryam Farbodi
Journal of Biomedical Science and Engineering (JBiSE) , 2009, DOI: 10.4236/jbise.2009.27077
Abstract: The aim of the present investigation was to develop a biosensor for the detection of amino acids, Leucine, Isoleucine and Valine based on a quartz crystal nanobalance. leucine (Leu), isoleucine (Ile), and valine (Val) were selectively determined by quartz crystal nanobalance (QCN) sensor in conjunction with net analyte signal (NAS)-based method called HLA/GO. An orthogonal design was applied for the formation of calibration and prediction sets including Leu, Ile and Val compounds. The selection of the optimal time range involved the calculation of the net analyte sig-nal regression plot in any considered time window for each test sample. The searching of a region with maximum linearity of NAS regression plot (minimum error indicator) and minimum of PRESS value was carried out by applying a moving window strategy. On the base of obtained results, the differences on the adsorption profiles in the time range between 1 and 300 s were used to determine mixtures of compounds by HLA/GO method. The results showed that the method was successfully applied for the determina-tion of Leu, Ile and Val.
Effect of Surface Roughness and Materials Composition  [PDF]
Maryam Gharechahi, Horieh Moosavi, Maryam Forghani
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2012, DOI: 10.4236/jbnb.2012.324056
Abstract: In the mouth, biofilm formation occurs on all soft and hard surfaces. Microbial colonization on such surfaces is always preceded by the formation of a pellicle. The physicochemical surface properties of a pellicle are largely dependent on the physical and chemical nature of the underlying surface. Thus, the surface structure and composition of the underlying surface will influence on the initial bacterial adhesion. The aim of this review is to evaluate the influence of the surface roughness and the restorative material composition on the adhesion process of oral bacteria. Both in vitro and in vivo studies underline the importance of both variables in dental plaque formation. Rough surfaces will promote plaque formation and maturation. Candida species are found on acrylic dentures, but dentures coating and soaking of dentures in disinfectant solutions may be an effective method to prevent biofilm formation. Biofilms on gold and amalgam are thick, but with low viability. Glass-ionomer cement collects a thin biofilm with a low viability. Biofilms on composites cause surface deterioration, which enhances biofilm formation. Biofilms on ceramics are thin and highly viable.
The embryonic blood–CSF barrier has molecular elements for specific glucose transport and for the general transport of molecules via transcellular routes  [PDF]
Maryam Parvas, David Bueno
Advances in Bioscience and Biotechnology (ABB) , 2010, DOI: 10.4236/abb.2010.14041
Abstract: In vertebrates, early brain development takes place at the expanded anterior end of the neural tube, which is filled with embryonic cerebrospinal fluid (E-CSF). We have recently identified a transient blood–CSF barrier that forms between embryonic days E3 and E4 in chick embryos and that is responsible for the transport of proteins and control of E-CSF homeostasis, including osmolarity. Here we examined the presence of glucose transporter GLUT-1 as well the presence of caveolae-structural protein Caveolin1 (CAV-1) in the embryonic blood-CSF barrier which may be involved in the transport of glucose and of proteins, water and ions respectively across the neuroectoderm. In this paper we demonstrate the presence of GLUT-1 and CAV-1 in endothelial cells of blood vessels as well as in adjacent neuroectodermal cells, located in the embryonic blood–CSF barrier. In blood vessels, these proteins were detected as early as E4 in chick embryos and E12.7 in rat embryos, i.e. the point at which the embryonic blood–CSF barrier acquires this function. In the neuroectoderm of the embryonic blood-CSF barrier, GLUT-1 was also detected at E4 and E12.7 respectively, and CAV-1 was detected shortly thereafter in both experimental models. These experiments contribute to delineating the extent to which the blood–CSF embryonic barrier controls E-CSF composition and homeostasis during early stages of brain development in avians and mammals. Our results suggest the regulation of glucose transport to the E-CSF by means of GLUT-1 and also suggest a mechanism by which proteins are transported via transcellular routes across the neuroectoderm, thus reinforcing the crucial role of E-CSF in brain development.
Training Based Channel Estimation in MIMO-OFDM Systems  [PDF]
Maryam Imani, Hamidreza Bakhshi
Communications and Network (CN) , 2012, DOI: 10.4236/cn.2012.41008
Abstract: OFDM combined with the MIMO technique has become a core and attractive technology in future wireless communication systems and can be used to both improve capacity and quality of mobile wireless systems. Accurate and efficient channel estimation plays a key role in MIMO-OFDM communication systems, which is typically realized by using pilot or training sequences by virtue of low complexity and considerable performance. In this paper, we discuss some methods for channel estimation based training symbols in MIMO-OFDM systems. The results confirm the superiority of the represented methods over the existing ones in terms of bandwidth efficiency and estimation error.
The Tight Bound for the Number of Pilots in Channel Estimation for OFDM Systems  [PDF]
Maryam Imani, Hamidreza Bakhshi
Communications and Network (CN) , 2012, DOI: 10.4236/cn.2012.42019
Abstract: Coherent detection in OFDM systems requires accurate channel state information (CSI) at the receiver. Channel estimation based on pilot-symbol-assisted transmissions provides a reliable way to obtain CSI. Use of pilot symbols for channel estimation, introduces overhead and it is desirable to keep the number of pilot symbols as minimum as possible. This paper introduces a new tight bound for the number of pilots in channel estimation using adaptive scheme in OFDM systems. We calculate the minimum number of necessary pilots using two approaches. The first approach for the number of pilots is obtained based on Doppler frequency shift estimation and the second approach is acquired based on channel length estimation using second order statistics of received signal. Finally we obtain the tight bound for the number of pilots using attained values.
Sumac (Rhus coriaria L.): Scolicidal Activity on Hydatid Cyst Protoscolices  [PDF]
Mohammad Moazeni, Maryam Mohseni
Surgical Science (SS) , 2012, DOI: 10.4236/ss.2012.39089
Abstract: Background: Few anthelmintics are available for the treatment of hydatid disease caused by the parasite Echinococcus granulosus. The appearance of resistance to synthetic anthelmintics and the adverse side effects of chemical drugs, stimulated the research of alternatives, such as medicinal plants. In the present study, the scolicidal effect of methanolic extract of sumac (Rhus coriaria) was investigated. Methods: Protoscolices were aseptically collected from sheep livers containing hydatid cysts. Three concentrations of sumac extract (10, 30 and 50 mg/mL) were used for 10, 20 and 30 min. Viability of protoscolices was confirmed by 0.1% eosin staining. Results: While the rate of dead protoscolices was 16.93% in the ontrol group, when protoscolices were exposed to sumac extract at the concentration of 10 mg/mL , the rate of dead protoscolices increased to 94.13%, 97.67% and 100% after 10, 20 and 30 minutes, respectively. The mortality rate of protoscolices increased to 98.89%, and 100% when they were exposed to 30 mg/mL concentration of sumac extract for 10 and 20 minutes respectively. One hundred percent mortality rate was observed at concentration of 50 mg/mL after 10 min of exposure. Conclusions: This in vitro study showed that methanolic extract of R.coriaria may be considered as an effective natural scolicidal agent.
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