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Search Results: 1 - 10 of 1470 matches for " JM Beitollahi "
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DMFT (Decayed, Missing, Filled, Teeth) Oral Health Index in Sweets and Cable Industry Workers
Z Tohidast akrad,JM Beitollahi,AA Khajetorab
Iranian Journal of Public Health , 2006,
Abstract: The most important factor in evaluating dental health is DMFT (Decayed, Missing, Filled, Teeth). This research was conducted to compare DMFT index in the workers of sweets and cable factories of Shahrood (Moghan), a small city near 300 km east of Tehran. All the 127 production line workers of cable factory and 124 workers of sweets factory who had the predetermined criteria were selected. A questionnaire was filled out and dental status was recorded for each one. After analyzing the data by SPSS soft ware the results were as follows: Mean and SD of DMFT in sweets factory: 12.59± 6.5; in cable factory: 9.7± 5.4; and Caries free in both factories was less than 1% which was neglectable. Mean and SD of DMFT in 35- 44 yr age group in sweet and cable factory was 11.6± 6.05, and 10.8± 6.5, respectively. With Anova two-way analysis in two groups and with P< 0/000, there was a significant correlation between type of work and DMFT which proved the hypothesis. Accordingly, consumption of sweets and neglecting oral hygiene can be considered of great importance in increasing DMFT in the workers of sweets factory compared to the cable factory.
An Overview on Nanotechnology Activities in Iran
S Sarkar,A Beitollahi
Iranian Journal of Public Health , 2009,
Abstract: "nDuring the last decade, nanotechnology has gained remarkable attention by international scientific and industrial societies. In this respect, various countries have launched their short and long-term programs to benefit from the huge market ex-pected by utilization and implementation of this technology in their industrial/technological infrastructures. Islamic republic of Iran, also by considering the undeniable impact of this technology on her nation's wealth and economy, initiated her na-tional nanotechnology development plan referred to as "Future Strategy" in 2005. The strategic plan outlines countries ma-jor action plans for ten-year period up to 2015 with the target to be amongst the top 15 countries active in this very impor-tant area. This paper, while reviewing briefly the objects, targets of the plan will also consider the status and achievements ob-tained by implementation of this strategic plan. Further, the impact of various developed infrastructures on the success of the program will be also discussed.
Voltammetricdeterminationofascorbicacidinthepresenceofacetaminophenandtryptophanusinganimprovedcarbonnanotubepasteelectrode
Hadi BEITOLLAHI,Somayeh MOHAMMADI
催化学报 , 2013, DOI: 10.1016/S1872-2067(12)60544-0
Abstract: ?Acarbonpasteelectrode(CPE)modifiedwithcarbonnanotubesand5-amino-3',4'-dimethyl-biphenyl-2-ol(5ADB)isprepared.UndertheoptimumpHof7.0,theoxidationofascorbicacid(AA)onthemodifiedCPEoccursatapotentialabout280mVlesspositivethanthatontheunmodifiedCPE.SomekineticandthermodynamicparametersforelectrocatalyticoxidationofAA,includingelectrontransfercoefficient(α=0.58)anddiffusioncoefficient(D=2.2×10-6cm2/s),arealsodetermined.AA,acetaminophen(AC),andtryptophan(TRP)weredetectedsimultaneouslyusingthemodifiedCPE.ThepeakpotentialsrecordedusingthemodifiedCPEinphosphate-bufferedsolutionatpH7.0were265,465,and780mVforAA,AC,andTRP,respectively.ThemodifiedCPEwassuccessfullyusedtodeterminetheconcentrationsofAA,AC,andTRPinrealsamples.
Effect of progressive muscle relaxation therapy on improving signs and symptoms of patients with myofacial pain dysfunction syndrome
Momen Beitollahi J.,Sahebjamie M.,Manavi A.,Farrokhnia T.
Journal of Dental Medicine , 2009,
Abstract: "nBackground and Aim: One of the most common causes of facial pain, is muscular pain. MPDS is one of the most important disorders of facial area that many of patients suffer from pain, tenderness of one or more masticatory muscles and limitation of movement. Psychological factors play an important role in MPDS. Anxiety and depression by increasing muscle tension, can cause myofacial pain syndrome; They can also accompany the syndrome as comorbidities or develop as sequelae of chronic pain and disability. Many approaches can be used to treat myofacial pain syndrome. The least invasive and least traumatic approach should be se.lected. Often, treatment for myofacial pain syndrome fails, because underlying problems go untreated. Progressive Muscle Relaxation (PMR) is mainly used for treating anxiety and depression. The aim of this study was to evaluate the effect of PMR in improving signs and symptoms of patients with MPDS. "nMaterials and Methods: In this before and after clinical trial study, 33 patients with MPDS that had anxiety and or mild depression(were assessed by Beck Inventory)were treated by PMR in a period of a month (3 visits)and were followed up until 2 months. Analysis was done using paired t-test/ wilcoxon-sign-rank test. "nResults: The results of this study showed that variants like intensity of pain, tenderness of masticatory muscles, maximum opening of mouth with and without pain, anxiety (p<0.001) and depression (p=0.001) improved significant 16 after treatment in comparison with before treatment. "nConclusion: In conclusion, PMR is effective in improving signs and symptoms in patients with MPDS. Therefore psychological status should be considered in treatment plan of these patients.
Electrocatalytic Determination of Ascorbic Acid at Chemically Modified Carbon Paste Electrode with 2, 7-bis (Ferrocenyl ethynyl) Fluoren-9-one
Jahan-Bakhsh Raoof, Reza Ojani, and Hadi Beitollahi
International Journal of Electrochemical Science , 2007,
Abstract: Cyclic voltammetry, differential pulse voltammetry and double potential step chronoamperometry were used to investigate the electrochemical behavior of ascorbic acid (AA) at a chemically modified electrode prepared by incorporating 2, 7-bis (ferrocenyl ethynyl) fluoren-9-one (2, 7-BFEFO) into carbon paste matrix. Under the optimized conditions (pH 7.00), the modified electrode showed high electrocatalytic activity toward AA oxidation; the overpotential for the oxidation of AA was decreased by more than 200 mV and the corresponding peak current increased significantly. In fact, the Fc/ Fc+ redox couple acts as a suitable mediator for indirect oxidation of AA. The diffusion coefficient (D = 8.65×10-6 cm2 s-1), and the kinetic parameters such as electron transfer coefficient, (α = 0.47) and the catalytic reaction rate constant, (k=8.55×103 M-1 s-1) were also determined using electrochemical approaches. The voltammetric response of the modified electrode was linear against the concentration of AA in the ranges of 5×10-5 M-2.65×10-3 M and 9×10-6 M-3.5×10-3 M with cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods, respectively. The detection limits (2δ) were determined as 1.8×10-5 M and 4.2×10-6 M by CV and DPV methods, respectively. This method was also used for determination of AA in some pharmaceutical preparations.
Evaluating the Most Common Etiologic Factors in Patients with Temporomandibular Disorders: A Case Control Study
J.M. Beitollahi,A. Mansourian,Y. Bozorgi,T. Farrokhnia
Journal of Applied Sciences , 2008,
Abstract: The aim of this study was to evaluate the prevalence of the most common etiologic factors of TMD in patients suffering from the disease. In a case-control study 56 patients referring to oral medicine and TMJ Department of Tehran University Dental School were recruited. Patients were divided into two groups based on signs and symptoms of TMD. The case group manifested at least three of the most frequent symptoms of TMD while the control group did not have any of the signs and symptoms of the disease. A questionnaire was filled for each patient evaluating anxiety and depression. The results of this study indicated that occlusal interferences was significantly more common in TMD group than the control group (p = 0.016). More studies are needed to evaluate and confirm the role of occlusal interferences in the etiology of TMD. Occlusal interferences should be in mind as a causative factor in the treatment of patients with TMD.
Prediction of annual genetic gain and improvement lag between populations
JM Elsen
Genetics Selection Evolution , 1993, DOI: 10.1186/1297-9686-25-1-75
Abstract:
Biotechnical measures for improvement of fertility in cattle
JM Sreenan
Genetics Selection Evolution , 1980, DOI: 10.1186/1297-9686-12-4-405c
Abstract:
Production de soie et caractéristiques des glandes séricigènes de 13 races de ver à soie (Bombyx mori)
JM Fayard
Genetics Selection Evolution , 1978, DOI: 10.1186/1297-9686-10-2-259
Abstract:
Effets de la consanguinité sur deux caractères quantitatifs chez le ver a soie
JM Legay
Genetics Selection Evolution , 1971, DOI: 10.1186/1297-9686-3-4-487
Abstract:
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