جستجوی مقالات مرتبط با کلیدواژه « oil » در نشریات گروه « پزشکی »

Among cosmetic surgeries, nose surgery is more anxiety-provoking than other surgeries. By causing mental stress, surgery leads to the disruption of vital signs. By releasing endorphins in the brain, aromatherapy leads to a feeling of well-being. This study was conducted to determine "the effect of lemon scent on patients' anxiety before rhinoplasty surgery in Ayatollah Kashani Hospital, Isfahan". This clinical trial was conducted on 30 candidates for rhinoplasty surgery at Kashani Hospital of Isfahan in 2011. Patients were divided into two intervention and control groups (15 people in each group) by random allocation method. The research tool was Spielberger's standard questionnaire, completed immediately before and 20 to 30 minutes after the intervention by two groups. Data were analyzed using SPSS 16 software, descriptive statistics and independent t, paired t and MANCOVA tests at a significance level of less than 0.05. Two groups were homogeneous in terms of demographic variables. The mean latent anxiety score in the intervention group before the intervention (10.06) was 42.26, and after the intervention (8.86) was 35.8, which difference was statistically significant (P = 0.002). The mean overt anxiety score in the intervention group before the intervention (8.66) was 42.60. After the intervention (5.81) was 31.86, this difference was statistically significant (p < 0.001). The results showed a statistically significant difference between the intervention and control groups in the mean of hidden (p = 0.029) and overt anxiety (p = 0.001). Using lemon scent as an effective, non-invasive and cost-effective non-medicinal intervention reduces the preoperative anxiety of rhinoplasty candidates, so it is possible to benefit from the scent of lemon to reduce patients' anxiety.

 Cervical ripening and achieving a favorable Bishop score are crucial for a successful delivery. When the cervix is not adequately ripe, exclusive labor induction might not succeed. Therefore, there is a need to identify safe concurrent interventions to improve the Bishop score.

 This study aimed to compare the effects of oral (capsule) and vaginal evening primrose oil, in conjunction with labor induction, on the Bishop score and various labor outcomes in pregnant women.

 This randomized, triple-blind clinical trial was conducted on 170 pregnant women admitted to terminate their pregnancies at Niknafs Maternity hospital in Rafsanjan, Iran, in 2020. The subjects were randomly allocated to 2 intervention groups: the oral evening primrose oil group (n = 57) and the vaginal evening primrose oil group (n = 56). A control group (n = 57) received oxytocin induction alone. Group assignment was performed using the minimization method. The first intervention group received two oral evening primrose 1 000 mg capsules; however, the second group received two 1 000 mg vaginal capsules, both in conjunction with labor induction using 10 units of oxytocin per 1 000 cc of Ringer’s serum. The data were collected using a checklist with three parts: The mother’s demographic characteristics, obstetric characteristics, and childbirth details. Descriptive statistics, including frequency, percentage, mean, median, and standard deviation (SD), were employed. Statistical analyses included one-way analysis of variance (ANOVA), independent t-tests (the Kruskal-Wallis test and Mann-Whitney test for non-parametric tests), and the chi-square test.

 Two hours after induction, the mean Bishop scores in the oral, vaginal, and control groups were 5.47 ± 1.67, 6.28 ± 1.91, and 4.09 ± 1.61, respectively (P < 0.001). Four hours after induction, the respective scores were 7.63 ± 1.59, 8.00 ± 1.20, and 5.18 ± 1.97 (P < 0.001). The vaginal group had significantly higher Bishop scores. Furthermore, the duration of the first and second phases of labor was significantly shorter in the vaginal group than in the oral and control groups (P < 0.001).

 Vaginal evening primrose oil was significantly more effective than oral capsules and induction with oxytocin alone in terms of the Bishop score and most labor outcomes.

The antioxidant activity of Bane (Pistacia atlantica) has been proved in different researches. This study evaluated the potential of Bane (Pistacia atlantica) essential oil (as a natural antioxidant) on the oxidative stability of sunflower oil. 

The essence of Bane was added to sunflower oil at concentrations of 200, 400,600,800, and 1,000 ppm. Tertiary Butyl Hydroquinone (TBHQ) was applied as synthetic antioxidant. All samples with the control were stored at 65 ̊C for 20 days. Gas Chromatography-Mass Spectrometry was used for the essence analysis. The 2,2-diphenyl-1-picrylhydrazyl radical scavenging assay, rancimat, p-anisidine value (P-AnVs), and peroxide value (PV) were determined to assess the efficacy of differecnt concentration of essence (200, 400,600,800, and 1,000 ppm). Data were analyzed by Statistical Analysis System (SAS) version 9 Software.

The essential oil yield was 0.1% v/w. The basic components of essence were monoterpene and sesquiterpene hydrocarbons. Synthetic antioxidant had the highest scavenging activity, followed by the mixture sample. PVs were in the range of 19.56-20.73 milliequivalents (meq)/kg for the treated samples after 20 days, while it was 38.74 on the 20th day for the control. For all treatments, PV was increased with increasing storage time. P-AnVs were 8.58-17.14 for stabilized samples and 18.02 for control sample on the 20th day of storage. In all stages, control sample had the highest P-AnV. For all samples, P-AnV increased as a subject of storage time.

P. atlantica (Bane) essential oil had a stabilizing effect on sunflower oil and can be used as a natural antioxidant to stabilize edible oil during storage.

Castor oil is used in some countries to induce labor, but results on its effectiveness and safety is controversial. This systematic review and meta‑analysis aimed to evaluate the effect of castor oil on labor induction and prevalence of vaginal delivery along with investigating its safety.

PubMed, Scopus, Web of Science, and Google Scholar were searched systematically up to September 2020. Observational studies and Randomized Clinical Trials (RCTs), which assessed the effect of castor oil on labor induction in English and Persian languages using different combinations of the related key terms and Medical Subject Headings (MeSH) terms were collected and analyzed independently by two authors. Random effect model was used for meta‑analysis. The studies were included in which the Relative Risk (RR) had been reported with 95% Confidence Intervals (CIs).

A total of 12 studies consisting 1653 pregnant women were included. The mean age of women who used castor oil was 24.72 years and in control group was 24.67 years. Results showed that labor induction was significantly higher in castor oil group than control group (RR: 3.27; 95% CI (1.96, 5.46)). Prevalence of vaginal delivery was 81% in the castor oil group and 69% in the control group.

It can be concluded that use of castor oil has positive effect on labor induction and increases the prevalence of vaginal delivery. None of the studies considered in this meta‑analysis reported any serious harmful effects for the use of castor oil. 

Gas condensate flares are a crucial factor in greenhouse gas emissions. The present study aimed to investigate the global warming potential resulting from gas condensate flares in the Ahvaz oil field, Ahvaz City, Iran, and its impact on climate indices from 2008 to 2018.

This is a descriptive cross-sectional study. The information on gas flares and climate data has been obtained from the National Iranian South Oil Company (NISOC) and meteorological stations in Khuzestan Province, Iran. The emission factor of greenhouse gases due to the burning of these flares was calculated after obtaining climatic information on gas flares in the study area. The climate indices of Ivanov, Emberger, and Barat were calculated for 11 years. Finally, the relationship between climate indices and Global Warming Potential (GWP) was determined using multiple regression.

The results showed that during the research period, an average of 626831.2.2 tons of carbon dioxide (equivalent) was produced due to gas flares in one month in the Ahvaz oil field. Carbon dioxide was responsible for 90% of the global warming effect of the flares. Based on the results of calculating climate indices, Ahvaz City in the studied years was classified in the category of “semi-arid” in Barat index, “dry desert” in Ivanov index, and “semi-arid desert” and “severe desert” in Emberger index.

The results of correlation analysis between GWP and climate indices show a significant negative correlation between the values of the Emberger index and the global warming potential caused by gas flares, indicating the impact of greenhouse gases on climate change in Ahvaz. These changes have intensified phenomena such as dust and severe floods.

The Oil content, fatty acid compositions of pistachio nut (Pistacia vera L.) samples corresponding to four different varieties (Achouri, Adjmi, Batouri and Mateur), all cultivated in Algeria were determined. The fatty acid profiles of four main commercial pistachio varieties, were determined by gas chromatography: palmitic (C16:0), palmitoleic (C16:1), Margaric (C17:0), Margarolic (C17:1), stearic (C18:0), oleic (C18:1), linoleic (C18:2), and linolenic (C18:3), Oleic acid has been found as the most common monounsaturated fatty acid. Linoleic acid has the highest percentage among polyunsaturated fatty acids. There have been significant differences among pistachio cultivars regarding unsaturated fatty acids. Based on the oleic to linoleic acid (O/L) ratio, a quality index was determined for these four varieties: Achouri (3.39)  Batouri(3.12)  Adjmi (2.89)  Mateur (2.88). PCA analysis showed the pistachio varieties division into three distinct groups: Adjmi and Mateur (rich in C18.2), Batouri (rich in C16.1, C18.3 and C18.1), Achouri (rich in C16.0, C18.1).

Tert-butyl mercaptan is one of the frequently used odorants derived from natural gases. It has been declared as a health hazard by the Occupational Safety and Health Administration (OSHA) in the USA. There is not much information available about the mercaptans long-term toxicity secondary to occupational exposure. This study was conducted to evaluate the oxidative stress caused by mercaptan odorant. 

The inhalation exposure of 80 maintenance workers in a gas industry was evaluated, using NIOSH 2542 and samples analyzed by gas chromatography mass spectroscopy. Also, the administrative staff were selected as the unexposed workers with matching age and work experience compared to the exposed subjects. The lipid peroxidation and ferric reducing plasma ability (FRAP), was evaluated as oxidative stress biomarkers. The acetylcholinesterase activity was also assessed for the neurological risks.

The tert-butyl mercaptan exposure was evaluated at average 0.01 ppm (0.005 to 0.15 ppm). There was oxidative stress in maintenance workers along with a significant increase in the lipid peroxidation, and a decrease in FRAP level (P=0.0001). The acetyl cholinesterase activity was decreased in over half of the exposed subjects, and correlated significantly with the tert-butyl mercaptan level (r=-0.4, P=0.026).

There was a correlation between the inhibition of acetyl cholinesterase activity and the induction of oxidative stress. Based on the findings, the chronic occupational exposure to tert-butyl mercaptan was identified as a health hazard. Therefore, specific health care strategies should be developed to minimize the toxic effect of this chemical.

Occupational stress is a psychological condition that occurs due to an imbalance between occupational needs and individual abilities. Resilience is an approach to cope with occupational stress. This study aimed to investigate the relationship between different dimensions of occupational stress and the level of resilience in the employees of an oil refinery.

This descriptive-analytical study was performed on 275 operational staff of an oil refinery in southern Iran in 2020. The study participants were selected using a simple random sampling method. Due to the Coronavirus Disease 2019 (COVID-19) pandemic, the tools used included three electronic questionnaires, demographic information, Osipow occupational stress questionnaire, and the Connor- Davidson Resilience Scale. The collected data were analyzed in SPSS v. 22 using descriptive tests, Pearson correlation test, one-way Analysis of Variance (ANOVA), and linear regression analysis.

The Pearson correlation test data indicated that different dimensions of occupational stress, including occupational scope, responsibility, and physical environment, also, the total score of occupational stress, have a significant negative correlation with the resilience score of individuals. The highest correlation concerned the physical environment dimension, with a coefficient of -0.189.

We can increase employees’ resilience by improving the working environment and raising people’s awareness of occupational responsibility; it can reduce occupational stress among employees.

Background & Aims of the Study:

 Given that modern society is a rapidly moving civilization, the production of automobiles resulted in a massive quantity of Used Automotive Oil Filters (UAOFs). So handling the waste stream secures value-added to the national assets and underpins the demands in other sectors. The steel request is highly rising with the population growth, and dismantling and recycling UAOFs produces enough scrap steel to be retrieved in similar applications. Experts of this sector have forgotten this resource. The present review sought the UAOF recycling technologies from the initial step of the project to the recent developments in this area. Also, plasma technology application was addressed as the new technology posed and noticed its modern procedure in the UAOF recycling operation based on the existing technologies.

In this review, the related articles were searched and studied using key relevant words. Also, we used valuable existing references in this regard. The industrial data employed in the present review refers to the project identification steps expressed and investigated by evaluator teams in the Environmental Impact Assessment (EIA) plan.

The collected results and concepts emphasized the redesign and reproduction of UAOF and employing frequently recycled scrap parts in the steel manufacturing operation.

The plasma technology enhances the adhesion, wettability, electro-conductivity, and many other characteristics of adsorbents within AOF and generates value-added products and nano-metal oxides from scrap metals of UAOF.

  Zoolbia and Bamieh, Iranian traditional sweets, are highly used in Ramadan by a large people. Unfavorable cooking conditions increase total polar compounds (TPC), acidity and peroxide values which have an important role in dangerous disease outbreaks. This study aimed to evaluate the amount of these three values in the oils after cooking these sweets in Behshahr city’s pastries in Ramadan.

  This cross-sectional study was conducted on all 11 pastries in Behshahr during a month. In total, 33 samples were taken at the beginning, middle and end of the weeks and at the end of daily cooking. The TPC value was measured by Testo 270 devices, while the acidity and peroxide values were measured according to titration standard methods and the results were analyzed with SPSS.

According to the results, in all cases, the acidity and TPC values were lower than the standard level of waste oils, but peroxide level was high.

Peroxide of sunflower oils for frying rises faster and more than other oils after cooking. According to the comparison of our findings with other studies, the oil samples had higher health status.

Crude oil is the most important exported product and a major pillar of national economic development. The majority of Iranchr('39')s crude oil exports are shipped from the Kharg oil terminal, which has required the establishment of massive oil facilities and related bureaucratic institutions on Kharg Island. Nonetheless, regardless of its economic benefits for the country, it is necessary to study the effects of this terminal on the life of island residents from different dimensions. Therefore, the present study aimed to assess the cultural and social consequences of bureaucratic activities of this company from the expertschr('39') perspective.

In this qualitative research, the needed data were collected through in-depth semi-structured interviews. The participants included knowledgeable people with the most accurate and useful information about the subject of the research. Their views were obtained, and the data were analyzed using the qualitative content analysis method.

The initial codes were extracted from the data, and after refining and classifying them, 24 concepts were identified which finally fell into five categories. Accordingly, the reduced spiritual health and disintegration of social cohesion among the native residents of Kharg were identified as the major cultural and social consequence of the facilities and oil terminal of Kharg Island.

As evidenced by the obtained results, it can be concluded that the merely economic and technological outlook on development and modernity is insufficient. Disregard for the cultural and social dimensions of modernity leaves adverse traces on peoplechr('39')s lives. Therefore, it is indispensable that these dimensions be taken into account in a comprehensive and balanced way to avoid the risks of such measures.