517 research outputs found
The first study of the phylogenetic relationships of three rare species of Blenniids (Fishes: Blenniidae) from Makoran Coast based on the gene sequencing of Cytochrome Oxidase 1
In order to assess the phylogenetic relationships of three rare species belonging to tribe Parablenniini was carried out, along the Coast of Oman Sea. Based on the type of habitats the specimens of Blenniid were collected from three sampling sites in the intertidal zones by Scoop and hand net in low tide and in sub-tidal zones by scuba diving and hand from 3, 6, 9, and 12m depths in September to March 2013. Totally 30 fish samples collected and deposited to the lab for further investigation. Based on the available identification keys and morphometric characters three species of Parablennius cornutus, Parabelennius pilicorn, Scartella emarginata were identified. DNA was extracted from the basal tissue of the first dorsal fin, subsequently by using a specific fish primer 700 bp of Cytochrome Oxidase C subunit 1 (CO1)was amplified in polymerase chain reaction (PCR) and sequenced. After comparison of Iranian Blenniid species CO1 sequence with sequence of 25 species from GenBank, was concluded that Iranian species are paraphyletically in the clade Parablenniini and sub-clads of Scartella and Parablennius. Since the relationship of Parablennius with other blenniids is the subject of many studies to resolve the conflicts and ambiguities among them we selected these genera to investigate the sister group relationship among them as well as other genera and clads. This is the first time that morphologic and molecular study of the two genera Parablennius and Scartella have been carried out in Iran
Mechanical and Shielding Properties of Concrete Subject to Gamma-ray
In this research, concrete with different percentages of 0, 10, 25, 50, 75 and 100 of barite powder and 10% of graphite powder were investigated for the study of gamma protective properties. The transmitted fluxes of gamma-rays that were emitted from Cs-137 source were detected by a NaI(Tl) detector and analyzed by an MCA analyzer. Then, the samples were tested for compressive strength, tensile strength, ultrasonic pulse wave velocity and the linear attenuation coefficients. By comparing the obtained samples, it was observed that a sample containing 10% barite powder plus 10% graphite powder could be used as a protective material against gamma rays
Comparison of different nitrogen compounds in three different environments of the Gwatar shrimp farms complex in the Gwatar Gulf region (Baluchestan-Iran)
This study aimed to investigate the quality of effluent water of a large shrimp farming complex in Chabahar region in Sistan and Baluchestan province (Iran). Fifteen sampling stations were designated in three distinct areas of these farms; i.e. the water supply canal, the drainage canal and the receiving area of the farm effluents in Gwatar Gulf. Water samples were taken from June to December 2004 for measurement and monitoring of nitrate, nitrite and ammonia compounds. The results revealed that the shrimp farms effluents have a profound effect on the water quality and aquatic environment of the drainage canal and the Gwatar Gulf. The average concentration of nitrate, nitrite and ammonia remained considerably higher in the drainage canal and Gwatar Gulf compared to the supply canal throughout the study. The amount of these compounds increased considerably in the drainage canal during the final stages of culture period and in Gwatar Gulf at post monsoon. The results of one way analysis of variance (at P<0.01 level) showed that all physical and chemical factors except water temperature were significantly different between stations. Considering that more than 25% of the shrimp farms of this complex were active during this study the measured values of nitrate, nitrite and ammonia compounds in the effluents were at the optimum range recommended for the shrimp farms
Protective effect of25mg-porphyrin-fullerene nanoparticles on oxygen-glucose deprivation/reperfusion injury in PC12 cells
We investigated the effects of25Mg-Porphyrin-Fullerene nanoparticles, (25MgPMC16) smart ferroporphyrin nanoparticles, on PC12 cells exposed to oxygen-glucose deprivation/reperfusion. In order to explore its effect on cells under oxygen-glucose deprivation conditions, the cultures were pretreated with25MgPMC16 24 hours prior to oxygen-glucose deprivation/reperfusion. To initiate the oxygen-glucose deprivation/reperfusion, the cell culture medium was replaced with a glucose-free medium and the cells were transferred to a humidified incubation chamber in a mixture of 95 N2 and 5 CO2 at 37° C for 30, 60 and 120 min. Cell viability was assessed by MTT assay. Exposure of PC12 cells to 30, 60 and 120 min oxygen-glucose deprivation significantly decreased the cell viability. Pretreatment of the cultures with25MgPMC16 significantly increased cell viability in a concentration-dependent manner. Pretreatment, the cultures with MK-801 (10 µM), a non-competitive NMDA antagonist, has attenuated the cell death after 30 min oxygen-glucose deprivation. We concluded that25MgPMC16 could protect PC12 cells against oxygen-glucose deprivation/reperfusion-induced cell injury in a concentration-dependent manner. That could be due to the effect of25MgPMC16 on ATP synthesis and the antioxidant effects of its components. © 2016 Tehran University of Medical Sciences. All rights reserved
CRYSTALLIZATION KINETICS OF GLASS-CERAMICS BY DIFFERENTIAL THERMAL ANALYSIS
The crystallization behavior of fluorphlogopite, a glass-ceramic in the MgO–SiO2–Al2O3–K2O–B2O3–F system, was studied by substitution of Li2O for K2O in the glass composition. DTA, XRD and SEM were used for the study of crystallization behavior, formed phases and microstructure of the resulting glass-ceramics. Crystallization kinetics of the glass was investigated under non-isothermal conditions, using the formal theory of transformations for heterogeneous nucleation. The crystallization results were analyzed, and both the activation energy of crystallization process as well as the crystallization mechanism were characterized. Calculated kinetic parameters indicated that the appropriate crystallization mechanism was bulk crystallization for base glass and the sample with addition of Li2O. Non-isothermal DTA experiments showed that the crystallization activation energies of base glasses was in the range of 234-246 KJ/mol and in the samples with addition of Li2O was changed to the range of 317-322 KJ/mol
When is the super socle of C(X) prime?
[EN] Let SCF(X) denote the ideal of C(X) consisting of functions which are zero everywhere except on a countable number of points of X. It is generalization of the socle of C(X) denoted by CF(X). Using this concept we extend some of the basic results concerning CF(X) to SCF(X). In particular, we characterize the spaces X such that SCF(X) is a prime ideal in C(X) (note, CF(X) is never a prime ideal in C(X)). This may be considered as an advantage of SCF(X) over C(X). We are also interested in characterizing topological spaces X such that Cc(X) =R+SCF(X), where Cc(X) denotes the subring of C(X) consisting of functions with countable image.The authors would like to thank professor O. A. S. Karamzadeh for introducing the concept of super socle of C(X) and for his helpful suggestions. The authors are also indebted to the well-informed, meticulous referee for reading the article carefully and giving valuable and constructive comments.Ghasemzadeh, S.; Namdari, M. (2019). When is the super socle of C(X) prime?. Applied General Topology. 20(1):231-236. https://doi.org/10.4995/agt.2019.10731SWORD231236201F. Azarpanah, Algebraic properties of some compact spaces, Real Anal. Exchange 25 (2000), 317-328.F. Azarpanah, Essential ideals in C(X), Period. Math. Hungar. 31 (1995), 105-112. https://doi.org/10.1007/BF01876485F. Azarpanah, Intersection of essential ideals in C(X), Proc. Amer. Math. Soc. 125 (1997), 2149-2154. https://doi.org/10.1090/S0002-9939-97-04086-0F. Azarpanah and O. A. S. Karamzadeh, Algebric characterization of some disconnected spaces, Italian. J. Pure Appl. Math. 12 (2002), 155-168.F. Azarpanah, O. A. S. Karamzadeh and S. Rahmati, C(X) vs. C(X) modulo its socle, Coll. Math. 3 (2008), 315-336. https://doi.org/10.4064/cm111-2-9T. Dube, Contracting the socle in ring of continuous functions, Rend. Semin. Mat. Univ. Padova 123 (2010), 37-53. https://doi.org/10.4171/RSMUP/123-2R. Engelking, General Topology, Heldermann Verlag Berlin, 1989.A. A. Estaji and O. A. S. karamzadeh, On C(X) modulo its socle, Comm. Algebra 13 (2003),1561-1571. https://doi.org/10.1081/AGB-120018497M. Ghadermazi, O. A. S. Karamzadeh and M. Namdari, C(X) versus its functionally countable subalgebra, Bull. Iranian Math. Soc. 45 (2019), 173-187. https://doi.org/10.1007/s41980-018-0124-8M. Ghadermazi, O. A. S. Karamzadeh and M. Namdari, On the functionally countable subalgebra of C(X), Rend. Sem. Mat. Univ. Padova 129 (2013), 47-70. https://doi.org/10.4171/RSMUP/129-4S. Ghasemzadeh, O. A. S. Karamzadeh and M. Namdari, The super socle of the ring of continuous functions, Math. Slovaca 67 (2017), 1001-1010. https://doi.org/10.1515/ms-2017-0028L. Gillman and M. Jerison, Rings of continuous functions, Springer-Verlag, 1976.O. A. S. Karamzadeh, M. Motamedi and S. M. Shahrtash, On rings with a unique proper essential right ideal, Fund. Math. 183 (2004), 229-244. https://doi.org/10.4064/fm183-3-3O. A. S. Karamzadeh and M. Rostami, On the intrinsic topology and some related ideals of C(X), Proc. Amer. Math. Soc. 93 (1985), 179-184. https://doi.org/10.1090/s0002-9939-1985-0766552-9O. A. S. Karamzadeh, M. Namdari and S. Soltanpour, On the locally functionally countable subalgebra of C(X), Appl. Gen. Topol. 16, no. 2 (2015), 183-207. https://doi.org/10.4995/agt.2015.3445S. Mehran and M. Namdari, The λ-super socle of the ring of continuous functions, Categ. General Alg. Struct. Appl. 6 (2017), 37-50.M. Namdari and M. A. Siavoshi, A note on discrete c-embedded subspaces, Mathematica Slovaca, to appear. https://doi.org/10.1515/ms-2017-023
The cut-off point of dual energy X-ray and laser (DXL) of calcaneus osteoporosis diagnosis in postmenopausal women
Background: Dual X-Ray Absorptiometry (DXA) is a method which can extensively be used for bone mineral densitometry (BMD). Another more recent method is DXL, which associate with dual X ray absorptiometry, assisted by laser measure heel thickness. In this study the cut off points for DXL of calcaneus in the diagnosis of osteoporosis in different bone regions in postmenopausal women had been determined. Materials and Methods: In 268 postmenopausal women, BMD of the spinal and femoral regions was measured by DXA, and the value for the calcaneous was measured by DXL. The agreement of the two methods in the diagnosis of osteoporosis and optimal cut-off point for DXL in defining osteoporosis was obtained. What obtained was the agreement of the two methods in the diagnosis of osteoporosis, as well as the optimal cut-off point for DXL in defining osteoporosis. Results: DXA showed osteoporosis in 40.7 of cases with 35.2 in L2-L4, 16.2 in the femoral neck, and 11.7 for the femoral total region. The DXL found osteoporosis, considering -2.5 SD as a threshold, in 26.1 of cases. Agreement of the two methods in the diagnosis of osteoporosis (Kappa score) was 0.443 for the lumbar region, 0.464 for the neck, and, 0.421 for total femur regions (all P values were significant). Using Receiver Operating Characteristic (ROC ) curves, it was found that a T-score of -2.1, -2.6 and -2.4 as the optimal cut-off point of DXL in the diagnosis of osteoporosis in the lumbar spine, the neck and total region of femur, respectively. Conclusion: The results of this study sh owed a moderate agreement between the two methods in the diagnosis of osteoporosis. It seems that the DXL cannot be used as a substitute for the DXA method, but it can be used as a screening method to find (to diagnose) osteoporosis
Evaluation of sperm chromatin integrity using aniline blue and toluidine blue staining in infertile and normozoospermic men
Background: Male infertility is defined as a man lost his ability to fertilize a fertile female naturally. Diagnosis of male infertility cannot be made just according to basic semen analysis. It is necessity to have specific tests for evaluation of chromatin integrity. In this study, an attempt was made to evaluate the sperm chromatin quality in fertile men and infertile subgroup. Methods: Among 1386 couples, 342 men were categorized into normospermia and 1044 were infertile and they were referred to Yazd Research and Clinical Center for infertility treatment. Standard semen analysis and sperm nuclear maturity tests including aniline blue (AB) and toluidine blue (TB) staining were done. Data were analyzed by SPSS software. The p=0.05 was considered statistically significant. Results: The mean value of TB staining was significantly higher in infertile group compared to normospermic group (p=0.005). Mean of sperm normal morphology was lower in idiopathic infertile men in comparison with normozoospermic men (p= 0.001). The highest negative correlation was obtained between sperm count and AB staining. Progressive motility was negatively correlated with AB and TB staining in both groups but there was no significant difference between AB staining and progressive motility in men normospermia group. Conclusion: Sperm chromatin staining using AB and TB showed a negative association between sperm chromatin condensation with sperm count, normal morphology and progressive motility. It seems that the AB and TB test may be useful for the assessment of male fertility potential. © 2019 Avicenna Research Institute. All rights reserved
Shared psychotic manic syndrome in monozygotic twins: A case report
Objective: A rare phenomenon of Shared Psychosis Disorder occurring in the context of Bipolar I Disorder, in identical twins is reported. Case Presentation: Two identical twins with shared Psychotic Manic Syndrome were admitted and received antipsychotic and lithium as their treatment. Psychotic symptoms of primary case did not improve and her diagnosis changed into Schizophrenia. They had hypothyroidism at the same time. Conclusion: Completely shared manic syndrome along with the psychotic features shows a need for the criteria of shared syndromes to develop, including both psychotic and mood symptoms
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