Effect of co-contaminants on the dechlorination of polychlorinated biphenylsPaper submitted to the Journal of Environmental Engineering and Science.

2010 ◽  
Vol 37 (4) ◽  
pp. 667-674
Author(s):  
Macoura Kone ◽  
Yanjun Chang ◽  
Gopal Achari ◽  
Cooper H. Langford

A promising photolysis based technology to dechlorinate polychlorinated biphenyls (PCBs), extracted from soils, in alkaline isopropanol (IPA) as reaction medium has been proposed. To be marketable the impact of co-contaminants extracted along with the PCBs, on the photodechlorination process needs investigation. In this paper the effectiveness of the photodeclorination process on PCBs extracted from samples of a representative soil containing co-contaminants is reported. The photodechlorination of PCBs extracted from weathered soils showed promising results of more than 76% dechlorination within the first hour of UV irradiation. Nearly complete dechlorination (96%) was achieved after 2 h of UV irradiation. To provide quantitative controlled appraisal of the effect of co-contaminants and explanation of the effects, dechlorination of neat Aroclor 1254 in the presence of the common co-contaminant, transformer oil, was evaluated. Further, the effect of transformer oil on some of the individual PCB congeners in the Aroclor mixture was also studied. The difference in the maximum percentage dechlorination of PCBs with and without transformer oil is 15%.

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Helen Kathryn Cyrus

Purpose Overview of coaching for recovery. The paper aims to show an overview of work that was carried out over 11 years with groups of mental health and physical staff. As the facilitator who had run this course for the duration in Nottingham, this was an excellent opportunity to be at the forefront of a brand new project. Design/methodology/approach The introduction of the skills are taught over two consecutive days followed by a further day a month later. The idea of coaching is to be enabled to find the answers in themselves by the use of powerful questions and using the technique of the grow model, combined with practice enables the brain to come up with its own answers. Using rapport and enabling effective communication to deliver the outcome. Findings Evidence from staff/clients and the purpose of the paper shows that when you step back it allows the individual patients/staff to allow the brain to process to create to come up with their solutions, which then helps them to buy into the process and creates ownership. Research limitations/implications The evidence suggests that the approach that was there prior to the course was very much a clinical approach to working with clients and treating the person, administering medication and not focussing on the inner person or personal recovery. The staff review has shown that in the clinical context change is happening from the inside out. Practical implications “Helps change culture”; “change of work practice”; “it changed staff focus – not so prescriptive”; “powerful questions let clients come to their own conclusions”; “coaching gives the ability to find half full. Helps to offer reassurance and to find one spark of hope”. Social implications This has shown that the approach is now person-centred/holistic. This has been the “difference that has made the difference”. When this paper looks at the issues from a different angle in this case a coaching approach, applying technique, knowledge and powerful questions the results have changed. The same clients, same staff and same problems but with the use of a different approach, there is the evidence of a different outcome, which speaks for itself. The coaching method is more facilitative, therefore it illicit’s a different response, and therefore, result. Originality/value The results/evidence starts with the individual attending and their commitment to the process over the two-day course. Then going away for the four weeks/six for managers and a commitment again to practice. Returning to share the impact if any with the group. This, in turn, helps to inspire and gain motivation from the feedback to go back to work invigorated to keep going.


2019 ◽  
Vol 128 ◽  
pp. 02005
Author(s):  
Natalia Lewandowska ◽  
Michal Cialkowski

The research concerns the development of geometric variants of patches sewn into the common carotid artery during surgery of the atherosclerotic plaques removal. Based on analytical methods, thegeometry of the patch described by the polynomial function has been developed. The simulations of blood flow in the arteries with the sewn patch were performed. The study included the influence of the patient’s diameter and the width of the chosen patch on blood flow disorders. The result of the research is the algorithm of selecting the geometry of the arterial patch to the individual geometrical featuresof the patient’s artery. The studies result will comprise the development of software, which, upon introduction of input data related to arterial geometry, patch length and patient’s blood parameters (affecting the fluid density and viscosity), shall generate an accurate contour of the patch of width causing no flow disorders.


2005 ◽  
Vol 83 (9) ◽  
pp. 1365-1371 ◽  
Author(s):  
Ik-Hwan Um ◽  
Ji-Youn Lee ◽  
Sun-Young Bae ◽  
Erwin Buncel

We report on a nucleophilic study of esters R-C(=X)-Y-Ar in which the electrophilic center has been modified by replacing O by S in the leaving group or carbonyl center: 4-nitrophenyl acetate (1), S-4-nitrophenyl thioacetate (2), 4-nitrophenyl benzoate (3), and O-4-nitrophenyl thionobenzoate (4). The studies include O– and S– nucleophiles as well as α nucleophiles in H2O at 25.0 ± 0.1 °C. The sulfur nucleophile (4-chlorothiophenoxide, 4-ClPhS–) exhibits significant enhanced reactivity for the reactions with thiol and thione esters 2 and 4 compared with their oxygen analogues 1 and 3. On the contrary, the common nucleophile OH– is much less reactive towards 2 and 4 compared with 1 and 3. The effect of changing both the electrophilic center and the nucleofugic center on the reactivity of the other oxygen nucleophiles is not so significant: 4-chlorophenoxide (4-ClPhO–) is four to six times more reactive in the reactions with thiol and thione esters 2 and 4 compared with their oxygen analogues 1 and 3. The α effects exhibited by butan-2,3-dione monoximate (Ox–) and HOO– are strongly dependent on the nature of the electrophilic center of the substrates, indicating that the difference in the ground-state solvation energy cannot be fully responsible for the α effect. Our results clearly emphasize the strong dependence of the α effect on the substrate structure, notably, the nature of the electrophilic center. The impact of change in the nucleofuge (1→2) and the electrophilic center (3→4) on reactivity indicates that α nucleophiles will need to be “purpose built” for decontamination and nucleophilic degradation of specific biocides.Key words: α effect, nucleophilicity, nucleofuge effect, electrophilicity, polarizability.


Author(s):  
Gabriela Trnková ◽  
Z. Malá

The article deals with the analysis of inequality in the distribution of the economic result in businesses engaging in field production in the Czech Republic, by way of the assessment of the impact of subsidies on the said inequality and by defining the effect of the size of the business on the economic result as well as inequality. The methodical tool is the quantification of the Gini coefficient and its elasticity. The data basis consists of panel data of 140 agricultural businesses focusing on field production for the period of the years 2005–2010.The main results of the submitted article substantiate a high inequality in the distribution of the economic result for the accounting period among field production businesses. The said inequality is not generally caused by the differing size of the analyzed businesses, and the associated volume of subsidies obtained, but is affected by other factors, such as the management quality, the investment activity of the business, or exceptional events. Subsidies do contribute to the more equal distribution of the economic result, but their impact is very small. Out of the individual categories of subsidies, the ones with the main redistribution effect are direct payments, as a result of the high proportion of total subsidies that they comprise.


Author(s):  
M. Dergach

The article reveals the peculiarities of playback theater as a psychodramatic technique, analyzes the current practice of using playback theater in the system of socialization and re-socialization. The author found that socialization, as a necessary process for interaction with the outside world, is manifested in the assimilation and appropriation of social experience for the purpose of productive functioning in it and to construct an image of the common and own world (as a part of the common), which allows a person to live a life while preserving individuality. and creatively influence the world. Within this provision, playback theater should be regarded as a technology of the paratheater system of dramatherapy, which is relevant at any stage of the socialization of the individual or as a means in the mechanisms of socialization. Playback theater contributes to the development of tolerance for social differences, the acceptance of another with all its features, values. Thanks to him, we learn to listen to understand others, because in the performance the main thing is the story of the viewer, the realization of which is impossible in reality without careful perception. The author has found that playback theater as a paratheater system of drama is a rather interesting and important means of socialization and re-socialization of the personality, it can be used in any group of people to solve problems of a wide range. The article describes in detail the content of the playback theater application, namely: social integration of individual subgroups into society; social and psychological adaptation of personality; social-psychological and therapeutic support for people who are in emotional and psychological state; creation of a more favorable social and psychological climate for the team; social and psychological support in complex events; development of personal qualities of children in educational institutions; social and psychological support of people in recreational activities; playback theater as a means of creating space for social networking. Prospects for further research on the topic of the article are to study the attitude of the audience to the performances of the playback theater, the search for the means of expression of the actors, the impact of playback on the children's audience.


2020 ◽  
Vol 498 (3) ◽  
pp. 3744-3757
Author(s):  
Rossana Ruggeri ◽  
Chris Blake

ABSTRACT Baryon acoustic oscillations (BAOs) represent one of the cleanest probes of dark energy, allowing for tests of the cosmological model through the measurement of distance and expansion rate from a 3D galaxy distribution. The signal appears at large scales in the correlation function where linear theory applies, allowing for the construction of accurate models. However, due to the lower number of modes available at these scales, sample variance has a significant impact on the signal, and may sharpen or widen the underlying peak. Therefore, equivalent mock realizations of a galaxy survey present different errors in the position of the peak when uncertainties are estimated from the posterior probability distribution corresponding to the individual mocks. Hence, the posterior width, often quoted as the error in BAO survey measurements, is subject to sample noise. A different definition of the error is provided by the asymptotic variance of the maximum likelihood estimator, which involves the average over multiple realizations, and is not subject to sample noise. In this work, we reanalyse the main galaxy survey data available for BAO measurements and quantify the impact of the noise component on the error quoted for BAO measurements. We quantify the difference between three definitions of the error: the confidence region computed from a single posterior, the average of the variances of many realizations, and the Fisher matrix prediction assuming a Gaussian likelihood. We also explore the impact of a ‘detectability prior’ based on the significance of the BAO detection.


2020 ◽  
Author(s):  
Juan Gómez ◽  
Elías Cuesta-Llavona ◽  
Guillermo M. Albaiceta ◽  
Marta García-Clemente ◽  
Carlos López-Larrea ◽  
...  

AbstractA polymorphism in the LZTFL1 gene located in the chemokine-receptor gene cluster (chromosome 3p) has been associated with the risk of developing COVID-19. The chemokine receptor-5 (CCR5) maps to this region, and the common 32 bp deletion variant (Δ32) has been associated with the extent of inflammatory disease and the outcome in several viral diseases. Several studies have also suggested that the pharmacological targeting of CCR5 could reduce the impact of SARS-CoV-2 infection and the severity of COVID-19. We sought to investigate whether this polymorphism was associated with the risk of moderate-severe COVID-19.We genotyped 294 patients who required hospitalization due to COVID-19 (85 were severe cases) and 460 controls. We found a significantly lower frequency of CCR5-Δ32 among the COVID-19 patients (0.10 vs 0.18 in controls; p=0.002, OR=0.48, 95%CI=0.29-0.76). The difference was mainly due to the reduced frequency of CCR5-Δ32 carriers in the severe, significantly lower than in the non-severe patients (p=0.036). Of note, we did not find deletion-homozygotes among the patients compared to 1% among controls. We also confirmed the association between a LZTFL1 variant and COVID-19. Our study points to CCR5 as a promising target for treatment of COVID-19, but requires validation in additional large cohorts. In confirmed by others, the genetic analysis of CCR5-variants (such as Δ32) might help to identify patients with a higher susceptibility to severe COVID-19.


2019 ◽  
Vol 9 (6) ◽  
pp. 1052-1077
Author(s):  
Stefan Machura ◽  
Sunita Matharu ◽  
Faye Mepham ◽  
Sarah Leanne Smith ◽  
Jonathan Aston

Driving under alcohol or while under the influence of a medication that impedes the ability to control a car are punishable offenses. The study asks if the perceived legitimacy of law, the perceived dangers of driving, including detection by the police, and the individual inclination to engage in risky and imprudent behaviour influence the likelihood of committing those offenses. At a British university, 337 students took part in a questionnaire study. The results show that students are less inclined to drive under alcohol than under medication. Both are variously influenced by practical circumstances like the frequency of driving, of drinking and the actual taking of such medication, even pressures to drive regardless. Driving under medication is also related to legitimacy of law. The difference may come from the absence of a public narrative for driving under medication: some students fall back to their attitude to the law. Conducir bajo los efectos del alcohol o de algún medicamento que obstaculice la capacidad de conducir un automóvil son delitos punibles. Este estudio se pregunta si la legitimidad percibida de la ley, los peligros percibidos de conducir (incluida la detección por parte de la policía) y la inclinación a mantener conductas arriesgadas e imprudentes influyen en la probabilidad de cometer dichos delitos. En una universidad británica, 337 estudiantes respondieron en un cuestionario. Los resultados muestran que los estudiantes son menos propensos a conducir bajo los efectos del alcohol que de medicamentos. Ambos casos están influidos por circunstancias prácticas, como la frecuencia de la conducción, de beber y de tomar dicho medicamento, incluso presiones para conducir en cualquier caso. Conducir bajo los efectos de medicamentos está relacionado con la legitimidad de la ley. La diferencia puede radicar en la ausencia de una narrativa pública sobre conducir bajo los efectos de medicamentos: algunos estudiantes se amparan en su actitud hacia la ley.


1931 ◽  
Vol 14 (4) ◽  
pp. 447-461 ◽  
Author(s):  
John W. Gowen

This paper presents a study of the influence of chromosome balance on duration of life in Drosophila. The balanced type of cells are shown to favor a longer life than are the unbalanced type. Under the identical conditions of the experiment, the type females live an average of 33.1±.6 days; the type males 28.9±.8 days; the triploid females 33.1±.8 days and the sex-intergrade females 15.0±.3 days. The unbalance of the chromosomes and therefore of the genes contained within them is evidently a fundamental factor in the probable life span of the individual. The magnitude of the effect is fully on a par with that found for other factors, i.e., different Mendelian genes for constitutional vigor, etc. It has been possible to show by a study of the various sex classifications within the sex-intergrade class that the presence or absence of ovarian or testicular tissue as such is not the primary cause of the difference in the life duration in the type males and females but that the cause is to be found deeper, sex determination and duration of life accompanying each other and resulting from the common cause, chromosome constitution. The survival curve of the sex-intergrade groups present a limiting curve of duration of life, a constant death rate for each day of age. The curves have different rates of degeneration. To account for this fact it is necessary to assume that for these particular organisms a different organ in the two groups has assumed major significance to life due to the gene complex which causes their differentiation. Recurrent chance environmental and hereditary agents acting on organs generate the type of probability curve observed. Triploid flies are made up of cells which are one-third larger than the cells of the type flies. It is not without significance to note that such individuals show no greater or less duration of life than do the ordinary flies when both groups have their chromosomes in balance.


2007 ◽  
Vol 3 (2) ◽  
pp. 85
Author(s):  
Dian Indri Purnamasari

Ihe problans concerning to the ethics in auditing profession is closely related to ihe values of the individuals involving in the profession. The study aims at finding empirical eyidences whiher *eie * the differau in tlrc specific vahrcs of the female and male students of accounting. Lhe results of the analysis of independent sample t-test indicate that there is the difference in specific values between the female and nale sAdq* of accumting. In other words, the gender gives impact tothe difiaance in the specific values of the male students of accounting. hrths ualysis hdicates ttut in fact the difference in the specific values is cansed by tlre presenge of the impact of gender on the aesthetic values, while fudividual, social and theoretical values between the fe- ,nale md male studqrts of accounting are the same or do not have any inryt ot the individual, social anitheoretical values.Keyryods : Yalues, Gender, Stadenrts of Accounting, Auditing.


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