Papers by mohammad jafari
Effect of Ventilation on Occupational Exposure to Airborne Biological Contaminants in an Isolation Room
Tanaffos, 2015
Airborne pathogens play an important role in a hospital air quality. Respiratory infections are t... more Airborne pathogens play an important role in a hospital air quality. Respiratory infections are the most common occupational disease among the health care staff. The aim of this study was to determine the effect of ventilation system parameters and patient bed arrangements on concentration of airborne pathogens in indoor air of an isolation room. A single-bed room was considered in which a patient diagnosed with tuberculosis had been admitted. Five different ventilation types, each at four different capacities were installed in the room while two different locations for the patient's bed were assessed. A direct-impact sampling method (blood agar plate) was used in order to determine the intensity of the bio-aerosols in indoor air of the isolation room. The results showed that when the air was supplied through a circular vent located on the northern wall and the vented air was exhausted via a linear vent located on the southern wall, the average concentration of the bio-aerosols ...
Association of Sick Building Syndrome with Indoor Air Parameters
Tanaffos, 2015
Energy crisis in 1973 led to smaller residential and office buildings with lower air changes. Thi... more Energy crisis in 1973 led to smaller residential and office buildings with lower air changes. This resulted in development of Sick Building Syndrome (SBS). The objective of this study was to assess the association of SBS with individual factors and indoor air pollutants among employees in two office buildings of Petroleum Industry Health Organization in Tehran city. The association between personal and environmental factors and SBS symptoms was examined by a reliable and valid combined questionnaire. Environmental parameters were measured using calibrated instruments. The results suggested that SBS symptoms were more common in women than men. Malaise and headache were the most common symptoms in women and men. Throat dryness, cough, sputum, and wheezing were less prevalent among employees in both offices. Light-intensity was significantly associated with some symptoms such as skin dryness (P = 0.049), eye pain (P = 0.026), and malaise (P = 0.043). There were no significant differenc...
International journal of molecular and cellular medicine, 2015
Bladder cancer (BC) ranks the second most common genitourinary tract malignant tumor with high mo... more Bladder cancer (BC) ranks the second most common genitourinary tract malignant tumor with high mortality and 70% recurrence rate worldwide. MiRNAs expression has noticeable role in bladder tumorigenesis. The purpose of this study was to assess miR-200c, miR-30b and miR-141 in tissue samples of patients with BC and healthy adjacent tissue samples and their association with muscle invasion, grade and the size of the tumor. Transurethral resection tissue samples were collected from thirty- five newly diagnosed untreated patients with BC from 2013 to 2014. The control group consisted of adjacent normal urothelium. All samples, observed by two pathologists, were diagnosed transitional cell carcinomas (TCC) with the proportion of tumor cells greater than 80%. Total RNA including miRNAs was extracted from about 50 mg tissue samples by applying TRIzol reagent. 2((-ΔΔ CT)) method was used to calculate relative quantification of miRNA expression. Two of 35 patients were females and the other 3...
Urology journal, 2015
To evaluate the expression of microRNAs in tissue samples from patients with bladder cancer and t... more To evaluate the expression of microRNAs in tissue samples from patients with bladder cancer and to compare it with healthy adjacent tissue samples as controls. Thirty five tissue samples from patients with newly diagnosed untreated bladder transitional cell carcinoma and 35 adjacent normal urothelium were collected during 2013 to 2014. TRIzol reagent was used to isolate total RNA including microRNAs. RNA concentration and purity were determined using a nanodrop spectrophotometer. Also 1% agarose gel electrophoresis was used to assess integrity of RNA. Real-Time Quantitative Reverse Transcription PCR (qRT-PCR) method was performed using the PARSGENOME microRNA RT-PCR system. Data was analyzed by STATA 11. A couple of patients were female the remainder were male. Mean age of patients were 71.06 ± 11.43 years. The expression level of miR-30b, miR-141 and miR-200c in case group were significantly higher than that of control normal tissue samples. miR-141 had higher expression rat...
Objective: Finding the synergism effect of miconazole and sulfametoxazole on 4 species of candida... more Objective: Finding the synergism effect of miconazole and sulfametoxazole on 4 species of candida. Methodology: Interactions of miconazole in combination with sulfametoxazole were tested in buffered yeast-nitrogen base using checkerboard method. Plates were inoculated with 20µl cells suspensions of each yeast and incubated at 30°C for 24 hour. In this method, the MICs were described as the lowest antimicrobial concentration
Toxicological & Environmental Chemistry, 2010
Toxicological & Environmental Chemistry, 2009
International Journal of Andrology, 2009
Endoscopic Management of Unusual Metastasis of Renal Cell Carcinoma to the Sinonasal Area
ACTA MEDICA …, 2009
8 : ACTA MEDICA IRANICA SEPTEMBER-OCTOBER 2009; 4(5):419-421. ENDOSCOPIC MANAGEMENT OF UNUSUAL ME... more 8 : ACTA MEDICA IRANICA SEPTEMBER-OCTOBER 2009; 4(5):419-421. ENDOSCOPIC MANAGEMENT OF UNUSUAL METASTASIS OF RENAL CELL CARCINOMA TO THE SINONASAL AREA SHAYANINASAB M.*,JAFARI ...
Tanaffos, 2009
The term "crystalline silica" refers to crystallized form of SiO 2 and quartz, as the most abunda... more The term "crystalline silica" refers to crystallized form of SiO 2 and quartz, as the most abundant compound on earth crust, is capable of causing silicosis and lung cancer upon inhaling large doses in course of occupational exposure.
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Papers by mohammad jafari