Iranian Samples Research Articles

Ultrasound-Assisted Extraction Followed by Solid-Phase Extraction Followed by Dispersive Liquid–Liquid Microextraction for the Sensitive Determination of Diazinon and Chlorpyrifos in Rice

Selectivity of solid-phase extraction (SPE) was combined with the concentration power of dispersive liquid–liquid microextraction (DLLME) to obtain a sensitive, low solvent consumption method for high-performance liquid chromatography determination of diazinon and chlorpyrifos in rice. In this method, rice samples were extracted by ultrasound-assisted extraction followed by SPE. Then, the SPE eluent was used as a disperser solvent in the next dispersive liquid-liquid microextraction step for further purification and enrichment of diazinon and chlorpyrifos. Under the optimal conditions, the linear range was from 5.0 to 250 μg kg−1 for diazinon and from 2.5 to 250 μg kg−1 for chlorpyrifos. Limits of detection of diazinon and chlorpyrifos were 1.5 and 0.7 μg kg−1, respectively. Limits of quantitation of diazinon and chlorpyrifos were 5.5 and 3.0 μg kg−1, respectively. The precisions and recoveries also were investigated by spiking 10 μg kg−1 concentration in rice. The recoveries obtained were over 90 % with relative standard deviation (RSD%) below 9.0 %. The new approach was utilized to successfully detect trace amounts of diazinon and chlorpyrifos in different Iranian rice samples.

Eco-Feminism in Contemporary Female Iranian Poetry

Today, nature, land and environment are of the important issues that everyone in his/her own position could have an important role in protecting them. Eco-feminism is a branch of feminism that communicates between ecology and feminism. Generally speaking, it can be said that Eco-feminists stesses on the three similar issues: women's relationships with nature, the relationship between domination over women and domination over nature, the role of women in solving ecological problems. One of their main arguments is that women mainly damage more from environmental pollution in comparison to men, as a result, the environment issue is mainly a gender-related issue. There is a consensus on the moral issues of environment protection, which is based on the wemen’s work and social posion, among eco-femenists. But their strategies for a change are different. One of these strategies is cultural strategy and can be related to literature and poetry. This paper explores the contemporary women's poetry from this point of view. Many of contemporary Iranian poetry samples show that they are closely linked with the nature. Respecting to the nature and environmental concerns and the preservation of nature has been reflected in their poetry and this voice can help changing the thought of society.

Cross‐national comparisons of attitudes towards suicide and suicidal persons in university students from 12 countries

This paper reports the results of a comparative investigation of attitudes to suicide and suicidal persons in 5,572 university students from 12 countries. Participants filled out two scales measuring attitudes towards suicide and suicidal persons, a measure of psychological distress together with the questions about suicidal behavior. Results showed that the highest suicide acceptance scores were observed in Austrian, UK, Japanese and Saudi Arabian samples and the lowest scores were noted in Tunisian, Turkish, Iranian and Palestinian samples. While the highest social acceptance scores for a suicidal friend were noted in Turkish, US, Italian and Tunisian samples, the lowest scores were seen in Japanese, Saudi Arabian, Palestinian and Jordanian samples. Compared to participants with a suicidal past, those who were never suicidal displayed more internal barriers against suicidal behavior. Men were more accepting of suicide than women but women were more willing to help an imagined suicidal peer. Participants with accepting attitudes towards suicide but rejecting attitudes towards suicidal persons reported more suicidal behavior and psychological distress, and were more often from high suicide rate countries and samples than their counterparts. They are considered to be caught in a fatal trap in which most predominant feelings of suicidality such as hopelessness or helplessness are likely to occur. We conclude that in some societies such as Japan and Saudi Arabia it might be difficult for suicidal individuals to activate and make use of social support systems.

Consanguinity Among Parents of Iranian Deaf Children

BackgroundIt seems that there is a relationship between consanguinity and profound hearing loss but there is little data about the association of consanguinity and hearing loss in Iran.ObjectivesThe aim of this study is to demonstrate the causes of profound bilateral sensorineural hearing loss among Iranian samples who are candidates for cochlear implantation.MethodsThis study was retrospective, analytical, and designed to collect information about profound hearing impaired cases referred to the Baqiyatallah Cochlear implantation center using enumeration. A total of 310 children with profound hearing impairments participated in this study. They were aged from 6 months to 4 years old. The study was done between January 2007 and April 2009. Chi-square tests were used to show whether there was any statistical difference between the incidence of marital consanguinity of their parents and the normal population.ResultsSixty-five percent of those 310 children had parents who had married with their relatives. Of the 203 (65%) parents that had consanguineous marriages, 132 were first cousins, which includes the children of two brothers (37 [11.8%] patrilateral parallel cousins), the children of two sisters (38 [12.2%] multi-lateral parallel cousins), or the children of a brother and a sister (57 [18.3%] cross cousins). Fifty-four (17.4%) of the parents were second cousins and 17 (5.2%) were beyond second cousins. Also, hearing loss etiology was obvious in 237 (76.3%) of the patients with profound hearing loss but was unknown in 73 (23.7%). Hereditary was identified as the most common cause in 33% of the cases.ConclusionsOur data demonstrated a 65% occurrence of consanguineous marriage among the parents of deaf children, which is statistically different from the percentage of consanguineous marriage among Iranian population (38%). This indicates an obvious relationship between severe hearing loss and consanguineous marriage.

Prediction of asphaltene precipitation from n-alkane diluted crude oil by using PC-SAFT equation of state

ABSTRACTThe precipitation tendency of heavy organics such as asphaltene has posed great challenges for petroleum industry, and thus study of asphaltene precipitation amount and formation conditions seems to be necessary. One of the most common approaches for prediction of asphaltene precipitation is using thermodynamic models. In this study a PC-SAFT equation of state (EOS) is used to predict asphaltene precipitation in two Iranian dead oil samples. Asphaltene content is obtained by filtration method of the oil samples diluted with specific concentrations of different normal alkanes. Also liquid-liquid equilibrium is used for characterization of oil sample into one heavy phase (asphaltene) and another light phase (saturates, aromatics, and resin). Calculations show that the developed model is highly sensitive to interaction parameter between oil fractions. Prediction results were improved due to using Chueh-Prausnitz equation. The results indicate good potential of PC-SAFT EOS in the prediction of asphaltene precipitation in crude oil samples diluted with different normal alkanes. The model error is <5% and the model precision is increased by reducing the number of normal alkane carbons.

Evaluating a subset of ancestry informative SNPs for discriminating among Southwest Asian and circum-Mediterranean populations

Many different published sets of single nucleotide polymorphisms (SNPs) and/or insertion-deletion polymorphisms (InDels) can serve as ancestry informative markers (AIMs) to distinguish among continental regions of the world. For a focus on Southwest Asian ancestry we chose to start with the Kidd Lab panel of 55 ancestry-informative SNPs (AISNPs) because it already provided good global reference data (FROG-kb: frog.med.yale.edu) in a set of 73 population samples distinguishing at least 8 biogeographic clusters of populations. This panel serves as a good first tier ancestry panel. We are now interested in identifying region-specific second tier panels for more refined distinction among populations within each of the global regions. We have begun studying the global region centered on Southwest Asia and the region encompassing the Mediterranean Sea. We have incorporated 10 populations from North Africa, Turkey and Iran and included 31 of the original 73 populations and eleven 1000 Genomes Phase3 populations for a total of 3129 individuals from 52 populations, all typed for the 55 AISNPs. We have then identified the subset of the 55 AISNPs that are most informative for this region of the world using Heatmap, Fst, and Informativeness analyses to eliminate those SNPs essentially redundant or providing no information among populations in this region, reducing the number of SNPs to 32. STRUCTURE and PCA analyses show the remaining 32 SNPs identify the North African cluster and appropriately include the Turkish and Iranian samples with the Southwest Asian cluster. These markers provide the basis for building an improved, optimized panel of AISNPs that provides additional information on differences among populations in this part of the world. The data have also allowed an examination of the accuracy of the ancestry inference based on 32 SNPs for the newly studied populations from this region. The likelihood ratio approach to ancestry inference embodied in FROG-kb provides highly significant population assignments within one order of magnitude for each individual in the Turkish, Iranian, and Tunisian populations.

Sensitivity analysis on sampling from affected wells by gas coning

ABSTRACTOnly representative samples could represent original reservoir conditions and have prevented overdesigning surface facilities and have been requirements of reservoir management programs. Representative samples cannot be collected in unsteady state situations. In some cases, samples must be collected in this state, so non-representative samples are obtained. Gas coning is one of the parameters that makes unsteady state flows. There is no standard method to determine accurate original compositions from non-representative samples. In this article, an attempt is made to introduce an accurate method for obtaining original in situ compositions from gas coning wells. Four Iranian oil reservoir samples obtained from the pressure volume temperature laboratory are used for evaluating methods of obtaining original fluids in unsteady state situations for the first time. For this purpose a synthetic model is formed by compositional simulation, and fluid properties of each reservoir are imported to it. Separator sampling is performed in the model. Methods of synthesizing original compositions (recombination and equilibrium contact mixing) are modeled by detailed equation of state characterization in the new scheme. Then collected samples are imported to them. Comparisons are made on obtained results of recombination and equilibrium contact mixing methods to find the most accurate method. It is concluded that equilibrium contact mixing, which was uncertain for companies, is definitely the most accurate method. Also, the authors conclude that after more than 2 years production performing an equilibrium contact mixing method is impossible in volatile oil models with gas coning but recombination with low accuracy can be used; however, equilibrium contact mixing has no limitation in black oil systems with gas coning and has minimum errors.

Determination of the major, minor, and trace element mass fractions in Iranian cement by INAA and WDXRF

The elemental composition of three different Iranian cement samples was determined by instrumental neutron activation analysis with the aim of quality control. The mass fractions for 4 major (Ca, Si, Fe, Al) and the 21 minor and trace elements (Mg, V, Mn, Na, As, La, Sb, Sm, U, Ba, Ce, Co, Cr, Eu, Hf, Sc, Sr, Th, Zn, S, K) were determined. X-ray fluorescence analysis was also used. The results obtained by both methods for Na, Mg, Fe, Ca, and Al are in good agreement. On the whole, the Iranian cement quality is quite acceptable according to national and international standards.

Purification and comparison of heat shock protein 90 (Hsp90) in Candida albicans isolates from Malaysian and Iranian patients and infected mice

The purposes of this study were to purify and compare the concentration ratios of heat shock protein 90 (Hsp90) in clinical isolates of Candida albicans (C.albicans) obtained from Malaysian and Iranian patients and infected mice. Hsp90 was extracted using glass beads and ultracentrifugation from yeast cells and purified by ion exchange chromatography (DEAE-cellulose) and followed by affinity chromatography (hydroxyapatite). Purity of Hsp90 was controlled by SDS-PAGE and its identification was realized by immunoblotting test. The graphs of ion exchange and affinity chromatography showed one peak in all C.albicans isolates obtained from both Malaysian and Iranian samples, infected mice and under high-thermal (42°C) and low-thermal (25°C) shock. In immunoblotting, the location of Hsp90 fragments was obtained around 47, 75 and 82kDa. The least average concentration ratios of Hsp90 were 0.350 and 0.240mg/g for Malaysian and Iranian isolates at 25°C, respectively, while the highest average concentration ratios of Hsp90 were 3.05 and 2.600mg/g for Malaysian and Iranian isolates at 42°C, respectively. There were differences in the ratio amount of Hsp90 between Malaysian isolates (1.01±0.07mg/g) and mice kidneys (1.23±0.28mg/g) as well as between Iranian isolates (0.70±0.19mg/g) and mice kidneys (1.00±0.28mg/g) (P<0.05). The results showed differences in all situations tested including Iranian and Malaysian isolates, samples treated with temperatures (25°C or 42°C) and before and after infecting the mice (37°C), indicating higher virulent nature of this yeast species in high temperature in human and animal models.

Comparative study of Graphic aspects of textiles in Indian Gurakani and Iranian Safavid eras

The extensive support for the textile production industry and art from kings of 2 simultaneous Safavids and Gurkani Dynasties in Iran and India helped its promotion. In these periods, valuable textiles which played a significant role in expressing the individuals’ social dignity were provided with valuable fibers, rare colors and particular designs. The main goal of this research is to comparatively analyze the Iranian textiles designs in Safavids and Indian ones in Gurkani dynasties during 9-11th centuries (AH) so that it can find the similarities and differences in term of designs and color of the textiles in these 2 countries and the level and reason for their effectiveness. This research focused on designed courtier textiles whose images and samples remained and are available. Investigation into the political-cultural relationship between these 2 dynasties, techniques, the materials and instruments used in textiles, itineraries and historical and research books and designs analysis on the basis of the available images and pictures were performed. The findings indicated that the level of effectiveness of technique and Iranian textile design were more than its vice versa state. The textiles colors were often similar, but the emphasis on some colors in Indian textiles seems particular. The effect of European on Indian designs is more than Iranian samples and the effect of religious and literature on Iranian artists and textile designs were more than those of Indian.

Death Anxiety, Reliability, Validity, and Factorial Structure of the Farsi Form of the Arabic Scale of Death Anxiety in Iranian Old-Aged Persons

The present study is aimed at examining the level of death anxiety and the sex-related differences among old-aged Iranian individuals sample to compare the old-aged persons with young college students and to explore the psychometric properties of the Arabic Scale of Death Anxiety (ASDA) factors in old-aged sample. A sample of 146 volunteer Iranian individuals took part in the study. The mean ages were 68.58 (SD = 7.10), men 68.81 (SD = 7.44) and women 68.28 (SD = 6.76), respectively. The mean score of the ASDA was 51.09 (SD = 20.19). Cronbach's alpha of the ASDA was found to be high (0.94); and Spearman-Brown coefficient was 0.92. Women had a significantly higher mean total score on the ASDA. Old-aged individuals had a significantly higher mean ASDA total score than younger college students (M age = 25.77). The factor analysis of the ASDA items yielded three factors accounting for 67.88% of the total variance labeled (F1) fear of dead people and tombs; (F2) fear of lethal disease and postmortem events; and (F3) death fear. These factors were highly replicable with previous factors extracted from a middle-aged Kuwaiti sample. On the basis of the present results, there are the following three general conclusions: death anxiety is not significantly correlated with age; the sex-related differences on death anxiety are striking in the Iranian samples; and the ASDA has a highly replicable factor structure among two Iranian and Arab countries.

İran`da Bazı Badem ve Seftali Türleri Üzerinde Karyosistematik Araştırma

Almond belongs to the genus Prunus from the family of Rosaceae with about 20 species in the forms of tree, spinous and spinousless shrub. One of the most important economically species is sweet almond. To determine the relationship between three wild and domestic species of almond ( Amygdalus communis, A. trichamygdalus woronow , A. lycioides spach) and peach (Prunus persica L), the karyosistematic studies were carried out using karyological methods. The root meristem cells were used in this study. For chromosome morphological studies, ten suitable metaphase plates were chosen in each sample and photographed. Also, the standard karyotype was prepared separately for the species as well as population and different chromosomes parameters including the complete length of the chromosomes, the long and short arms length, the arms relative length (AR), % TF (Total Form Percentage) and the chromosomes relative length were measured. There was a significant difference among all of the identified species. It was determined that all the species were diploid and their chromosome numbers were 2n=16. The mean chromosomes size in Iranian samples of this species was about 2.43± 0.03µ Also there was a significant difference among all of the homologous chromosomes due to the measured cytological characters. Similarity and difference among the species evaluated based on cytological parameters including the chromosomes length, the long arm and short arm length, the arms relative length and the chromosomes index. Statistical analysis showed that A. communis had the most similarity with A. lycioides and the species A. trichamygdalus and P. persica had the most similarity with each other. All studied species were cytologically classified into three groups.

Psychometri properties of the Cognitive Emotion Regulation Questionnaire in a sample of Iranian population

Psychometri properties of the Cognitive Emotion Regulation Questionnaire in a sample of Iranian population

The roles and effectiveness of design in new product development: A study of Irish manufacturers

Investments in design can make a significant contribution to successful new product development (NPD). However, there is insufficient evidence on the most appropriate or effective role that design could play. Previous case-based research has identified alternative roles for designers in NPD, but there is only tentative evidence over such roles’ contribution to NPD outcomes. Using data on a large sample (c. 1300) of Irish manufacturing plants we are able to examine the effectiveness of three different levels of involvement of designers in NPD and their impact on NPD novelty and success. Our analysis suggests that design is closely associated with enhanced performance regardless of the type of role it plays. However, the potential effects of involving design throughout the process appear to be much greater. The relationship between design and NPD outcomes is also strongly moderated by contextual factors; for example, its significance is only evident for organisations, which also engage in in-house R&D. Also, while both small and larger plants do gain from using design as functional specialism and in some stages of the NPD process, the additional benefits of a continuous involvement of design throughout the process are only evident in larger plants. Finally, while discourse and perceptions over design's role in NPD have certainly changed over time, suggesting a much more widespread and strategic use of design, our findings provide a more static picture, showing that design engagement with the NPD process has not changed significantly over the last two decades.

Direct and indirect effects of maltreatment typologies on suicidality in a representative Northern Irish sample: Psychopathology only partially mediates the relationship

There has been a rise in suicide rates among men who grew up during the 1970's in Northern Ireland (NI). Conflict exposures (CEs) have been linked with suicide ideation but not attempts. Civil conflict has also been linked with aggressive parenting which is associated with the development of aggressive drives, psychopathology and suicidality. This study investigated (1) cohort specific associations between latent classes (LCs) of maltreatment and (2) associations between LCs, CEs, psychopathology and suicidality. Data were from NI Study of Health and Stress (N = 1986). Maltreatment and suicidality were queried using validated measures. Psychiatric assessments were based on DSM-IV criteria. Logistic regression, latent class analysis, chi square tests and mediation analyses were conducted. Two at risk LCs were identified, entitled “family violence exposure” (FVE, 10.4%; Male, 55.4%) and “family violence and sexual abuse exposure” (FVSAE, 1.2%; Female, 90.5%). Both were more likely to have experienced CEs (FVE = 71%; FVSAE = 77.5%) than the low risk class. The FVE were more likely to be male; aged 35–49 and to suffer from a mental disorder. The FVSAE class all endorsed rape, were more likely to be separated and to suffer from a mental disorder. CEs uniquely predicted ideation but not enactment. Psychopathology partially mediated the relationship between LCs and suicidality. FVE and FVSAE directly increased the odds of enactment. These findings are original and highly pertinent and they should be used to inform any strategy for addressing the cohort specific and trauma related rise in suicide rates in NI.

Destructive leader behavior

This article provides insights into the important but relatively unexamined issue of destructive leadership in a non-Western country. Although tentative, the article also provides some guidance for expatriate managers in adapting their own behavior to avoid being categorized as “destructive” by non-Western subordinates. In the following pages, we report the findings of a study of destructive leader behaviors among convenience samples of Australian, American, and Iranian leaders. No differences were found between Australian and American leaders in regard to the nature and frequency of destructive behaviors. As a result, the Australian and American data were combined and compared to a sample of Iranian leaders. Destructive leader behavior was measured using the Destructive Leadership Questionnaire developed by Shaw et al. (2011). Although relatively small in magnitude, results consistently indicated that the worst, middle, and best leaders differed significantly from one another in both samples in terms of the level of destructive leader behavior exhibited. In general, the pattern was similar for both the Australian–American and Iranian samples, although small, consistent differences were observed across the two samples.

Determination and speciation of Se(IV), Se(VI), and selenomethionine in iranian walnut samples by spectrophotometry after cloud point extraction

A sensitive and selective micelle-mediated speciation and preconcentration method has been developed for trace amount of inorganic and organic selenium prior to UV-Vis spectrophotometry determination. The method is based on cloud point extraction of Se(IV) ions with polyethylene glycol tert-octylphenyl ether (Triton X-114) in presence of 2,3-diaminonaphthalene (DAN) as a chelating agent. Se(IV) ions react with DAN in a surfactant solution yielding a hydrophobic complex at pH 3. The phase separation was accelerated by a 20 min centrifugation at 3500 rpm. The calibration graph obtained from Se(IV)-DAN complexes was linear in the concentration range of 5.0–400.0 ng/mL and detection limit was 9 ng/mL. The relative standard deviation was 1.6% in the determination of 80 ng/mL Se(IV). The proposed method was successfully applied to the speciation and determination of selenium species-Se(IV), Se(VI), selenomethionine—in walnut samples with satisfactory results.

Development of robust model to estimate gas–oil interfacial tension using least square support vector machine: Experimental and modeling study

The measuring of physical properties in laboratory is very important issue in petroleum industry. Secondary and tertiary oil recovery, gas condensate recovery, especially by gas injection, near-critical fluids recovery and wettability alteration surface tensions are very important to measure. One objective of this study is to perform a precise measuring procedure employing the pendant drop technique. Iranian oil reservoir samples as denser phase and its immiscible injecting gas are used at reservoir condition. While experimental measurements are often expensive and time-consuming, models are commonly used. Moreover, this study presents the potential of the least squares support vector machines (LSSVM) modeling approach to predict the gas–oil interfacial tension. To develop the model, a total of 75 data generated from our experiments covering a wide temperature range of 100 through 200F and a wide pressure range of 14.7 through 5000psi are used. Genetic algorithm (GA) as population based stochastic search algorithm was used to gain the optimal LSSVM models parameters respectively. The results revealed that the GA-LSSVM are capable of capturing the complicated nonlinear relationship between the input and output variables. For the purpose of predicting gas–oil interfacial tension, the GA-LSSVM models yielded the mean absolute error (MAE) and coefficient of determination (R2) values of 1.6028 and 0.9988, respectively for the whole data set.

Effects of Native and Non-Native Resins on Asphaltene Deposition and the Change of Surface Topography at Different Pressures: An Experimental Investigation

Asphaltene deposition during oil production and transportation causes extensive damage to reservoirs and wellhead equipment. In this study, the effects of native and non-native resins as well as those of their mixtures on the asphaltene deposition process are investigated. A novel pressure, volume, and temperature (PVT) visual cell is used to check the effect of resin on asphaltene deposition at different pressures and reservoir temperatures. Two Iranian crude oil samples with different potentials of asphaltene deposition (low and high) were used in these tests. During depressurizing in the presence of native and non-native resins, the amount of asphaltene deposited was measured. To monitor any changes in surface topography, the atomic force microscopy (AFM) technique was used in this study. The results show that the amount of asphaltene deposited decreases as the amount of resin increases; however, less asphaltene is deposited when the resin mixture is used than when the native resin is used. At high rat...

Cross-cultural Measurement Equivalence of the KINDL Questionnaire for Quality of Life Assessment in Children and Adolescents.

This cross-cultural study aimed to assess whether Iranian and Serbian children, and also their parents, perceived the meaning of the items in the KINDL quality of life questionnaire consistently. The sample included 1086 Iranian and 756 Serbian children and adolescents, alongside 1061 and 618 of their parents, respectively. The ordinal logistic regression was used to assess differential item functioning (DIF) of the self and proxy-reports of the two versions of the KINDL, including Kid-KINDL and Kiddo-KINDL, across Iranian and Serbian samples. Statistically significant DIF was flagged for 14 out of 24 (58%) and 20 out of 24 (83%) items in the self-report of the Kid-KINDL and Kiddo-KINDL, respectively. Moreover, 20 out of 24 (83%) in the proxy reports of the both Kid-KINDL and Kiddo-KINDL, showed DIF across two samples. Accordingly, considerable caution is warranted when using the KINDL for cross-cultural comparisons.