Efficiency of SparkJet

The thermal efficiency of a SparkJet is evaluated by measuring the impulse response of a pendulum subject to a single spark discharge. The SparkJet is attached to the end of a pendulum. A laser displacement sensor is used to measure the displacement of the pendulum upon discharge. The pendulum motion is a function of the fraction of the discharge energy that is channeled into the heating of the gas (i.e., increasing the translational-rotational temperature). A theoretical perfect gas model is used to estimate the portion of the energy from the heated gas that results in equivalent pendulum displacement as in the experiment. The earlier results from multiple runs for different capacitances of C = 3, 5, 10, 20, and 40(micro)F demonstrate that the thermal efficiency decreases with higher capacitive discharges.1 In the current paper, results from additional run cases have been included and confirm the previous result

Prenatal Diagnosis and Management of a Fetus with Double Aortic Arch: A Case Report and Literature Review

Double aortic arch is a congenital vascular abnormality in which the connected segments and their branches course between and compress the trachea and esophagus, often resulting in invariable airway compression and gastrointestinal presentations. A 2-month girl with a history of double aortic arch diagnosis in fetal echocardiography was admitted to our hospital with recurrent pneumonia. The double aortic arch was confirmed by computed tomography angiogram. After surgery, the patient was followed for one year of age and had no problem. Our study showed early diagnosis and treatment of a double aortic arch might prevent chronic, irreversible complications

Personal Protective Equipment for Protecting Healthcare Staff during COVID-19 Outbreak: A Narrative Review

Context: The World Health Organization (WHO) declared a pandemic state as the coronavirus spread across the world. Personal protective equipment (PPE) has become a critical subject during the COVID-19 outbreak. It is necessary to prevent coronavirus transmission to healthcare workers (HCWs) as providing care. They are at high risk of exposure to coronavirus. The aim of this study was to provide a brief review of some routes of transmission of COVID-19, what, when and why PPE is recommended base on the route of transmission. Evidence acquisition: In this review, articles were extracted from the Google Scholar, Scopus, Web of Science, and PubMed search engines. The main keywords for search were coronavirus, COVID-19, personal protective PPE, healthcare, transmission, contact, and protect. Results: Findings showed the COVID-19 transmission rate in the HCWs that wore PPE significantly decreased. All HCWs must use appropriate and adequate PPE in order to minimize the COVID-19 transmission. Conclusion: Although still uncertainty remains around COVID-19 transmission and it is early to have conclusion on its prevention, most of recommendations and guidance have emphasized to apply the PPE during COVID-19 outbreak among HCWs

Personal Protective Equipment for Protecting Healthcare Staff during COVID-19 Outbreak: A Narrative Review

Context: The World Health Organization (WHO) declared a pandemic state as the coronavirus spread across the world. Personal protective equipment (PPE) has become a critical subject during the COVID-19 outbreak. It is necessary to prevent coronavirus transmission to healthcare workers (HCWs) as providing care. They are at high risk of exposure to coronavirus. The aim of this study was to provide a brief review of some routes of transmission of COVID-19, what, when and why PPE is recommended base on the route of transmission. Evidence acquisition: In this review, articles were extracted from the Google Scholar, Scopus, Web of Science, and PubMed search engines. The main keywords for search were coronavirus, COVID-19, personal protective PPE, healthcare, transmission, contact, and protect.Results: Findings showed the COVID-19 transmission rate in the HCWs that wore PPE significantly decreased. All HCWs must use appropriate and adequate PPE in order to minimize the COVID-19 transmission. Conclusion: Although still uncertainty remains around COVID-19 transmission and it is early to have conclusion on its prevention, most of recommendations and guidance have emphasized to apply the PPE during COVID-19 outbreak among HCWs

Some effects of sex and culture on creativity, no effect of incubation

Results remain mixed regarding the effects of incubation tasks on divergent thinking, a type of creativity, generally assessed via the Unusual Uses Task (UUT). Using a within-subjects design, we compared 64 participants’ performance on the UUT, after four different incubation tasks: copy a simple painting, copy a complex painting, 0-back-task, and rest. We hypothesized that an arts-related activity during incubation (here: copy a painting) would boost subsequent creativity. Five different creativity scores were computed from the raw UUT data, and we provide a step-by-step guide for how to compute these: fluency, flexibility, originality, subjective creativity, and usefulness. Creativity was only modulated by sex; women outperformed men on creative fluency. No other variables, nor the incubations, modulated any of participants’ creativity scores. A within-group comparison showed that the unusual uses of our all-Iranian participants were more useful than unique, echoing previous work suggesting differences between Eastern and Western conceptions of creativity

Investigation of Qualitative Condition of Nekarud River and Tajan River by NSFWQI Index

Rivers are exposed to large amounts of impurities. The first step for keeping river water quality and purification of polluted parts is obtaining information on the qualitative changes of river water in dimensions of time and place and also, determination of major sources and various water pollutants. Analysis of measured parameters alone or in combination, give in complete information on water quality because of variety of parameters, samples and stations. WQI is a mathematical and statistical tool for conversion of quantitative values of large quantity of water quality data into single number which presents a simple and understandable tool for qualitative assessment. Samples were collected seasonally from stations at upstream, middle stream and downstream of two rivers in east of Mazandaran province (Nekarud River, Tajan River) in a 2 years interval of 2011-2012 years, and analyzed in laboratory of  Environmental Protection agency of Mazandaran according to standard methods. The values of NSFWQI (water quality index ofAmerica’s national health organization) were calculated for all stations and all of the stations were located on the level of unsuitable conditions. The condition of Tajan River was relatively better than Nekarud River due to lower residential villages and towns around the river

Phytoremediation of BTEX from indoor air by Hyrcanian plants

Background: Phytoremediation is one of the available and simple techniques for removing benzene, toluene, ethylbenzene, and xylene (BTEX) from indoor air. This study aimed to evaluate phytoremediation of low concentrations of BTEX by Hyrcanian plants including Ruscus hyrcanus and Danae racemosa. Methods: The test chamber was used to evaluate the removal of BTEX. Benzene, toluene, ethylbenzene, and xylene were injected into the chamber using Gastight syringes (Hamilton) to generate the concentration of 10 (benzene), 20 (toluene), 20 (ethylbenzene), and 50 (xylene) μL/L Results: Ruscus hyrcanus was able to remove BTEX (10, 20, 20, and 50 μL/L) from air after 3 days. D. racemosa could uptake BTEX (10, 20, 20, and 50 μL/L) from air after 4 days. Removal efficiency was calculated based on leaf area and volume of the chamber. R. hyrcanus showed the highest removal efficiency ranged from 8.5075 mg/m3/h.cm2 for benzene to 86.66 mg/m3/h.cm2 for xylene. The increase in BTEX phytoremediation was assessed after repeated exposures. A significant phytoremediation efficiency was obtained after the third injection of BTEX to the chamber. Afterwards, the effects of BTEX on anatomical and morphological structure of plants were studied. The results of Photomicrography showed that tissue structures of leaves and stems changed. Study of D. racemosa and R. hyrcanus stems showed that vascular bundles also changed. The development of crystal in vacuole of spongy parenchyma was the main anatomical change of R. hyrcanus and D. racemose compared to the control samples. Conclusion: It can be concluded that R. hyrcanus and D. racemosa can be used for phytoremediation of indoor air pollution. Keywords: Volatile organic compounds, Air pollution, Indoor, Plant leaves, Sick building syndrom

Investigation of Qualitative Condition of Nekarud River and Tajan River by NSFWQI Index

Rivers are exposed to large amounts of impurities. The first step for keeping river water quality and purification of polluted parts is obtaining information on the qualitative changes of river water in dimensions of time and place and also, determination of major sources and various water pollutants. Analysis of measured parameters alone or in combination, give in complete information on water quality because of variety of parameters, samples and stations. WQI is a mathematical and statistical tool for conversion of quantitative values of large quantity of water quality data into single number which presents a simple and understandable tool for qualitative assessment. Samples were collected seasonally from stations at upstream, middle stream and downstream of two rivers in east of Mazandaran province (Nekarud River, Tajan River) in a 2 years interval of 2011-2012 years, and analyzed in laboratory of  Environmental Protection agency of Mazandaran according to standard methods. The values of NSFWQI (water quality index ofAmerica’s national health organization) were calculated for all stations and all of the stations were located on the level of unsuitable conditions. The condition of Tajan River was relatively better than Nekarud River due to lower residential villages and towns around the river