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Nosrat, Ali,Peimani, Ali,Asgary, Saeed The Korean Academy of Conservative Dentistry 2013 Restorative Dentistry & Endodontics Vol.38 No.4
Objectives: The purpose of the study was to evaluate human dental pulp response to pulpotomy with calcium hydroxide (CH), mineral trioxide aggregate (MTA), and calcium enriched mixture (CEM) cement. Materials and Methods: A total of nine erupted third molars were randomly assigned to each pulpotomy group. The same clinician performed full pulpotomies and coronal restorations. The patients were followed clinically for six months; the teeth were then extracted and prepared for histological assessments. The samples were blindly assessed by an independent observer for pulp vitality, pulp inflammation, and calcified bridge formation. Results: All patients were free of clinical signs/symptoms of pulpal/periradicular diseases during the follow up period. In CH group, one tooth had necrotic radicular pulp; other two teeth in this group had vital uninflamed pulps with complete dentinal bridge formation. In CEM cement and MTA groups all teeth had vital uninflamed radicular pulps. A complete dentinal bridge was formed beneath CEM cement and MTA in all roots. Odontoblast-like cells were present beneath CEM cement and MTA in all samples. Conclusions: This study revealed that CEM cement and MTA were reliable endodontic biomaterials in full pulpotomy treatment. In contrast, the human dental pulp response to CH might be unpredictable.
Synthesis of Unsymmetrical Trisannelated Benzenes
Mahmoodi, Nosrat O.,Fatemeh, Mostaghni 대한화학회 2002 대한화학회지 Vol.46 No.1
2,3,4,5,6,7,8,9,10,11-데카하이드로-1H-사이클로펜타[l]페난트렌(1c)과 1,2,3,4,5,6,7,8,9,10-데카하이드로사이클로헥사[e]-as-인다센(1d) 같이 비대칭적으로 삼고리화된 벤젠을 합성하였다. 합성의 접근방법으로 사이클로펜탄온과 사이클로헥산온의 존재하에 무수 를 촉매로 사용하여 미리 형성된 바이사이클로헥실리덴-2-온 (3), 바이사이클로헥실-1''-엔-2-온 (4) 과 바이사이클로펜틸리덴-2-온(5) 같은 엔온들의 효율적인 축합반응을 사용하였다. Synthesis of unsymmetrical trisannelated benzenes such as 2,3,4,5,6,7,8,9,10,11-decahydro-1H-cyclopenta[l]phenanthrene (1c) and 1,2,3,4,5,6,7,8,9,10-decahydrobenz[e]-as-indacene (1d) is described. The synthetic approach involves efficient condensation of pre-formed enones such as bicyclohexyliden-2-one (3), bicyclohexyl-1-en-2-one (4) and bicyclopentyliden-2-one (5) in the presence of cyclopentanone and cyclohexanone using anhydrous as a catalyst.
Ali Nosrat,Prashant Verma,Saeed Asgary 대한치과보존학회 2018 Restorative Dentistry & Endodontics Vol.43 No.2
Iatrogenic perforations negatively impact the outcome of endodontic treatments. Studies on prognostic factors showed that perforations in the coronal third of the root with periodontal pocket formation have an unfavorable prognosis. A 36-year-old female was referred for endodontic evaluation of tooth #13 with a history of an iatrogenic perforation, happened 3 years ago. There was a sinus tract associated with perforation, 10 mm probing on the mesial and mesio-palatal, bleeding on probing, radiolucent lesion adjacent to the perforation and complete resorption of the interdental bone between teeth #13 and #12. After the treatment options were discussed, she chose to save the tooth. The tooth was accessed under rubber dam isolation, the perforation site was cleaned and disinfected using 0.5% sodium hypochlorite and sealed with calcium-enriched mixture cement. Eighteen months after treatment the tooth was functional and asymptomatic. The probing depths were normal without bleeding on probing. Radiographically, the interdental crestal bone formed between teeth #13 and #12. Despite all negative prognostic factors in this case (i.e., perforations in the coronal third, pocket formation, and radiolucent lesion), healing was unexpectedly achieved via non-surgical repair of the perforation. Further research on biological aspects of healing in the periodontium following iatrogenic perforations are recommended.
Ali Nosrat,Ali Peimani,Saeed Asgary 대한치과보존학회 2013 Restorative Dentistry & Endodontics Vol.38 No.4
Objectives: The purpose of the study was to evaluate human dental pulp response topulpotomy with calcium hydroxide (CH), mineral trioxide aggregate (MTA), and calciumenriched mixture (CEM) cement. Materials and Methods: A total of nine erupted thirdmolars were randomly assigned to each pulpotomy group. The same clinician performedfull pulpotomies and coronal restorations. The patients were followed clinically forsix months; the teeth were then extracted and prepared for histological assessments. The samples were blindly assessed by an independent observer for pulp vitality, pulpinflammation, and calcified bridge formation. Results: All patients were free of clinicalsigns/symptoms of pulpal/periradicular diseases during the follow up period. In CHgroup, one tooth had necrotic radicular pulp; other two teeth in this group had vitaluninflamed pulps with complete dentinal bridge formation. In CEM cement and MTAgroups all teeth had vital uninflamed radicular pulps. A complete dentinal bridgewas formed beneath CEM cement and MTA in all roots. Odontoblast-like cells werepresent beneath CEM cement and MTA in all samples. Conclusions: This study revealedthat CEM cement and MTA were reliable endodontic biomaterials in full pulpotomytreatment. In contrast, the human dental pulp response to CH might be unpredictable.
M. Heydari Nosrat Abadi,H. Hassanpour Darvishi,A.R. Zamani Nouri 사단법인 한국계산역학회 2019 Computers and Concrete, An International Journal Vol.24 No.5
In this paper, dynamic stress, strain and deflection analysis of concrete pipes conveying nanoparticles-water under the seismic load are studied. The pipe is buried in the soil which is modeled by spring and damper elements. The Navier-Stokes equation is used for obtaining the force induced by the fluid and the mixture rule is utilized for considering the effect of nanoparticles. Based on refined two variables shear deformation theory of shells, the pipe is simulated and the equations of motion are derived based on energy method. The Galerkin and Newmark methods are utilized for calculating the dynamic stress, strain and deflection of the concrete pipe. The influences of internal fluid, nanoparticles volume percent, soil medium and damping of it as well as length to diameter ratio of the pipe are shown on the dynamic stress, strain and displacement of the pipe. The results show that with enhancing the nanoparticles volume percent, the dynamic stress, strain and deflection decrease.
Advances in nanomicelles for sustained drug delivery
Najmeh Amirmahani,Nosrat O. Mahmoodi,Mohsen Mohammadi Galangash,Atefeh Ghavidast 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.55 No.-
The efficient direct access of therapeutic molecules to the target tissues is still a major obstacle in developing useful therapeutic interventions. Over the past decades, polymeric micelles are interesting nanocarries for drug delivery systems due to small size (10–100 nm), low toxicity, capacity to solubilize lipophilic drugs in core and high drug loading. Here, the design of various nanomicelles such as amphiphilic dendrimer, boronate ester linked, X-shaped four-armed gemini-like, amphiphilic based vitamin E, styrene-maleic acid, diselenide linkages, oleic acid and natural polymeric inulin and vitamin E, siRNA and natural water soluble polysaccharides nanomicelles described and their efficacy discussed.
Mohsen Oftadeh,Nosrat Madadi Mahani 한국약제학회 2013 Journal of Pharmaceutical Investigation Vol.43 No.4
Theoretical investigation of the interaction between thiadiazolylthioacetamide derivatives (TTAs) and linear-dendrimer have been performed by the ONIOM2(B3LYP/6-31G: UFF) method. The results showed that there are weak interactions containing hydrogen bonds and Vander Waals interactions, and clearly indicated that these complexes have relatively low stability; therefore, the PCA–PEG–PCA copolymer is a suitable drug delivery molecule for anti-HIV drugs. The interaction energies and NBO analysis of the anti-HIV drugs (TTAs derivatives)-polymer–tyrosine system indicated these nanocarriers can be utilised to improve the biological and anti-HIV activity of TTAs.
Duality of Photonic Crystal Radiative Structures and Antenna Arrays
Mahdieh Bozorgi,Nosrat Granpayeh 한국광학회 2010 Current Optics and Photonics Vol.14 No.4
In this paper, behaviors of photonic crystal (PC) radiative structures and antenna arrays have been compared for two types of uniform and binomial excitations. Appropriate duality has been shown between them. These results can be generalized to other types of excitation and arrangement of photonic crystal radiative arrays such as linear, planar and circular arrays of three dimensional (3D) photonic crystal termination resonators. Using these results in designing photonic circuits has some advantages for shaping a particular radiative beam at the photonic crystal exit, for instance reducing the divergence angle of the main lobe in order to enhance the directivity, for better coupling, or for splitting the emitted beam, for dividing the output beam to the next devices in photonic integrated circuits (PIC). For analysis and simulation of the photonic crystal structures, the finite difference time domain (FDTD) method has been employed.