hadis karimi

Investigating the impact of fly ash on concrete strength and durability in the challenging marine environment of the Persian Gulf is crucial due to sulfate attacks and salt effects. This study aims to enhance the lifespan of these structures by increasing strength and reducing permeability. The innovative approach involves microstructural assessment of fly ash’s influence on Calcium Hydroxide (CH) and C-S-H nanostructure formation in concrete. Around 120 concrete samples with varying fly ash content were exposed to the Persian Gulf for three months, undergoing compressive strength, permeability, and microstructural analysis. Results reveal fly ash addition decreases permeability and boosts concrete strength. Notably, concrete containing 10% fly ash exhibited a 15.4% strength increase and reduced permeability from 22.4 × 10-7 cm/h to 8.98 × 10-7 cm/h after 90 days. Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) analysis showcased CH reduction and enhanced C-S-H nanostructure, bolstering concrete durability. This study offers valuable insights for engineers constructing coastal Persian Gulf structures, indicating fly ash augmentation enhances microstructural properties, reduces permeability, and bolsters strength.

The proliferation of petrochemical industries and oil refineries in the western region of Hormozgan province has led to the placement of numerous concrete structures in close proximity to organic pollutants. This proximity has the potential to significantly influence the resistance parameters and durability of concrete. Therefore, the primary objective of this article is to investigate the short-term and long-term effects of exposure to organic pollutants from crude oil on the microstructural properties and strength of concrete. This research entailed the evaluation of approximately 360 concrete samples. These samples underwent a 12-month curing process in emulsions containing varying concentrations of crude oil (0.5%, 1%, 1.5%, 2.5%, 5%, 10%, 25%, 50%, and 100%). Compressive strength tests were conducted at intervals of 1, 3, 7, 28, 90, and 365 days, with concurrent analysis of changes in permeability coefficient. Microstructural examination was carried out using Scanning Electron Microscope (SEM) images, while structural analysis was performed using EDX. Additionally, X-ray Diffraction (XRD) tests were conducted to study the formation of hydration products in environments contaminated with crude oil and to analyze the crystalline structure of the materials. The results reveal that the resistance of concrete samples cured in crude oil emulsions depends on the concentration of the emulsion. Notably, the compressive strength of samples cured in 100% crude oil concentration emulsion decreased by approximately 41% after 365 days when compared to the control sample. Specifically, the compressive strength dropped from 41 MPa to 24 MPa, while the permeability coefficient increased from 3.2*10-7cm/h to 15.3*10-7cm/h.

Industrial activities, particularly in petrochemical and refinery sectors, have introduced a wide range of organic pollutants into the environment, leading to the pollution of aggregate materials with crude oil or petroleum products. This study investigates the influence of aggregate materials contaminated with crude oil and diesel on the cement hydration process and concrete properties. Around 90 concrete samples with polluted aggregates were evaluated over a 6-month period. Compressive strength tests and water absorption percentage tests were conducted at different ages. Microstructural analysis through SEM, structural analysis via EDX, and XRD analysis for hydration product characterization were performed. Results showed a significant reduction in compressive strength (47% and 31%) for samples contaminated with crude oil and diesel, respectively, compared to the control. Water absorption and permeability increased in polluted samples. SEM, and XRD, results indicated increased ettringite production, decreased nanostructure C-S-H, reduced strength and durability, and increased water absorption and permeability in the concrete. This study highlights the detrimental effects of organic contaminants on concrete properties, emphasizing the need for pollution management in aggregate materials for sustainable construction practices.

This study was planned and implemented with the aim of investigating the laboratory diagnostic markers of renal patients with COVID-19. In this analytical cross-sectional study, by referring to the Department of medical records and health information system (HIS) and reviewing the files of kidney patients with covid-19 admitted from March 20, 2020, to March 19, 2021, in Taleghani Educational Hospital as the center of covid-19 disease in Abadan city, the information of patients were received. In this research, 125 patients were studied, of which 77 were men (61.6%) and 48 (38.4%) were female. The results showed that among the laboratory and clinical markers, fasting blood sugar (FBS), potassium (K), blood urea nitrogen (BUN), creatinine, serum glutamic oxaloacetic transaminase (SGOT), Serum glutamate pyruvate transaminase (SGPT), erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), lactate dehydrogenase (LDH) and respiratory rate (RR) were higher than the normal range and oxygen saturation (SpO2) was lower than the normal range. Also, a significant relationship was found between SpO2 index and the outcome of the disease, blood type O, intubation, K, International normalized ratio (INR), prothrombin time (PT), mean corpuscular hemoglobin concentration (MCHC), sore throat, care in the intensive care unit (ICU) and respiratory rate. Results showed that FBS, renal markers, inflammatory markers and liver markers were higher than the standard range in renal patients with COVID-19, and between the reduction of SpO2 and some clinical and laboratory diagnostic markers was a significant relationship.

Patients with ovarian cancer are mostly diagnosed at advanced stages which leads to poor prognosis and high mortality rate. Deregulation of lncRNA HOXD-AS1 expression associates with cancer development and metastasis. However, the expression level of this lncRNA in ovarian cancer is not determined.50paired ovarian tumors and their adjusted normal tissues were included in the study. Total RNA was extracted by TRIzol® Reagent and reverse-transcribed to cDNA using PrimeScript II cDNA synthesis kit. The expression levels of HOXD-AS1 were quantified by qRT-PCR and compared. The Roc curve analysis was used to evaluate the capacity of HOXD-AS1 as a biomarker for ovarian cancer. We observed that lncRNA HOXD-AS1 was significantly upregulated in ovarian tumors compared to their adjusted normal tissues (p <0.003). Moreover, the ROC curve analysis revealed that the lncRNA HOXD-AS1 expression level could discriminate tumoral and non-tumoral tissues with 85% sensitivity and 88% specificity. The lncRNA HOXD-AS1 expression level might be considered as a potential biomarker for ovarian cancer development.

Life expectancy index is used in assessing changes in the health status of Kurdistan Province community, Iran, especially among the elderly, the difference in the health levels of women and men, and also the economic levels and the desired changes. This study aimed to evaluate the life expectancy in the age groups in Kurdistan Province using demographic information and mortality based on age and sex during the years 2006 and 2016.
In this study, life expectancy was used for calculating life table according to the World Health Organization (WHO). Death information was extracted based on age groups and using demographic data of the statistical centers; in addition, the raw mortality rate was extracted according to age groups and calculated using Chiang method in the stage of life expectancy by sex and location. To analyze the data, Stata 12 and Excel software packages were used for calculations.
Life expectancy at birth in Kurdistan Province in the whole population was equal to 74.56 and 78.31 years in 2006 and 2016, respectively, and this rate was higher among women compared to men.
Extensive factors including medical and health status, well-being, nutrition status and quality, etc., affect the life expectancy index in different societies, and promotion of each criterion increases the life expectancy. It is necessary to establish required fields for establishing these indicators at the provincial level by creating a complete and accurate record of mortality and illness.