Sökresultat

Filtyp

Din sökning på "*" gav 547951 sökträffar

Physicochemical metamorphosis of re-aerosolized urban PM2.5

The toxicity of particulate matter (PM) is dependent on particle physical and chemical properties and is commonly studied using in vivo and in vitro approaches. PM to be used for in vivo and in vitro studies is often collected on filters and then extracted from the filter surface using a solvent. During extraction and further PM sample handling, particle properties change, but this is often neglec

Spy Hunters in a High-Trust Society : A Study of Secrecy, Suspicion, and Cooperation in Swedish Counterintelligence in the 1980s

During the 1980s, Sweden faced a substantial intelligence threat from Soviet and Warsaw Pact attempts at collection and infiltration. Despite this, Swedish counterintelligence managed to launch several effective responses, including early detection of recruitment attempts and expulsion of a number of hostile intelligence officers operating under diplomatic cover. One part of this was the willing c

Forskare: Skapa inte mer polarisering mellan människa och natur, Moderaterna

Viljan att skydda växter och djur får ibland orimliga effekter. Det skriver flera företrädare för Moderaternas arbetsgrupp för en kommande miljöpolitik på DN debatt.Farlig polariseringDe tar bland annat upp viktiga frågor om ”människans plats i naturen”. Men konflikten mellan utveckling och miljö är en återkommande missuppfattning. Frågan om naturvården främst bör utgå från människans eller nature

Digitalized Social Services : Formation of "new" street-level relations and professional compensation

This paper investigates social workers' perceptions of their relationships with clients across three Swedish different municipalities. By selecting three municipalities at varying stages of digitalization, the study facilitates a comparison of social workers' accounts. The comparison highlights differences in the descriptions of the relationship between social workers and clients, shedding light oThis paper investigates social workers' perceptions of their relationships with clients across three Swedish different municipalities. By selecting three municipalities at varying stages of digitalization, the study highlights differences in the descriptions of the relationship between social workers and clients, shedding light on whether, and if so, how, digital tools influence this relationship.

The use of protective hearing devices and perceived noise disturbance and social climate in open office environments

Open office environments are architectural solutions that are believed to economize the use of office space and facilitate social interactions at work. However, research has shown that employees in open office environments may experience lower job satisfaction, stress reactions, and exhibit poorer performance. Exposure to noise in open office environments may prompt avoidance behaviours such as wo

Self-reported noise sensitivity and perceived enjoyment of working in an open office environment

Individuals may vary in their sensitivity to noise and this may affect how they relate to their surroundings. As part of an intervention project about the psychosocial effects of informational sound masking, we examined the occurrence of self-labeled noise sensitive individuals as well as the association between three indicators of noise sensitivity and one indicator for the perceived enjoyment of

Intervention : Democratising infrastructure

This intervention seeks to revivify democratic thinking in political geography, through foregrounding and pluralising its material and temporal dimensions. At the same time, it speaks to a renewed centrality and relevance of infrastructure and infrastructural projects in political discourse. The contributions included here demonstrate how an infrastructural lens can offer new insights into democra

Microplastics in Latin America Ecosystems : A Critical Review of the Current Stage and Research Needs

The ubiquity of microplastics ecosystems has gained global attention. In this context, Latin America, which is responsible for 8% of the world's consumption of plastic material and has a small recycling rate (4.5%), does not have enough data on microplastics contamination in its environmental matrices. This systematic review analyzed 196 studies from 16 territorials in Latin America and provided i

Microplastic abundance quantification via a computer-vision-based chemometrics-assisted approach

Microplastic (MP) contamination is a topic of growing global concern; these particles are ubiquitous in environmental ecosystems and have been found in aquatic, terrestrial, and atmospheric mediums. However, the protocols to quantify MPs in environmental samples have limitations and may lead to overestimation and/or underestimation of the plastic debris. Therefore, the aim of this research was to

Photodegradation of Emerging Contaminant 2-(tiocyanomethylthio) Benzothiazole (TCMTB) in Aqueous Solution : Kinetics and Transformation Products

Direct photolysis of the emerging contaminant 2-(thiocyanomethylthio) benzothiazole (TMCTB) was performed in aqueous solution at different concentrations with high-pressure mercury lamp (5.0, 8.0, 13.0, 16.0, 20.0, 23.0, 27.0, 35.0, 40.0, 45.0, and 50.0 mg L− 1) and with natural sunlight radiation (6.0, 30.0, and 60.0 mg L− 1). TCMTB underwent rapid degradation by direct photolysis with a high-pre

First evidence of microplastic contamination in the freshwater of Lake Guaíba, Porto Alegre, Brazil

The ubiquitous presence of microplastics in the aquatic environment has raised concern about their potential impacts on and risks to the biota. While the presence of microplastics in a marine environment has been well studied, the impact of microplastic contamination in freshwater bodies is understudied. In the present study, baseline data about contamination with microplastics in Lake Guaíba in s

How natural and anthropogenic factors should drive microplastic behavior and fate : The scenario of Brazilian urban freshwater

Brazil maintains its position at the top of the global ranking of plastic producers, yet recycling efforts have been incipient. Recent data reveals an annual production of approximately 14 million tons of plastic waste, not accounting for the surge in the usage of plastic masks and related materials due to the COVID-19 pandemic. However, what remains largely unreported is that over half of post-co

Processing of amazon catfish skins - Dourada (Brachyplathstoma sp.) and Piraíba (Brachyplatystoma sp.)

In this work, Piraíba and Dourada skin wastes were used for leather processing. They were initially stripped and characterized by their percentage composition. The results showed that pH, differential pH cipher [SLC13/ IUC 11/ BS 1309:9 - Determination of pH value and Difference Figure of an Aqueous Extract], chromium content and mechanical properties after chromium tanning were in accord with lea

Removal of endocrine disrupters in water under artificial light : the effect of organic matter

The current research investigates the removal of endocrine disruptor compounds (EDC) in the absence and presence of organic matter in aqueous solution and natural water. In addition, the interactions of different fractions of natural organic matter (NOM) and fulvic acid (FA) in 17α-estradiol (EE2), 17β-estradiol (E2), estrone (E1) estriol (E3) and bisphenol A (BPA) were assessed. The interaction e

Degradation of the microbicide 2-(thiocyanomethylthio) benzothiazole by direct photolysis

Microbicides in the leather industries are employed to avoid the biodeterioration of the hides by microorganisms. This problem may lead to harmful characteristics to the end product such as stains, roughness and decrease mechanical properties of leather. Therefore, microbicides like the 2-(thiocyanomethylthio) benzothiazole (TMCTB) are applied in distinct steps of the tanning process as alternativ

Adsorption of endocrine disrupting compounds from aqueous solution in poly(butyleneadipate-co-terephthalate) electrospun microfibers

Endocrine disrupting compounds (EDC) have the potential to seriously impact ecosystems and humans. To date, numerous techniques have been investigated for removing such contaminants from water, including biodegradation, photocatalysis, ozonation, and the Fenton process. However, these methods are expensive from the perspectives of equipment and operating costs. Herein, we investigated the use of e

Sorption of endocrine disrupting compounds onto polyamide microplastics under different environmental conditions : Behaviour and mechanism

Microplastics of polyamide are commonly found in aquatic environments and might act as vectors of different contaminants such as endocrine disrupting compounds (EDC). Therefore, sorption of 17α-ethynylestradiol (EE2), 17β-estradiol (E2), and estriol (E3) on polyamide microplastics was studied under different simulated environments. The results suggest that the sorption process was affected by the

Consortium of microalgae for tannery effluent treatment

Wastewater generated in tanneries have essential elements for microalgae growth, but it has also some toxic compounds that may hinder or restrain the growth of microalgae in this environment. This work tested microalgae consortium growth originating from a deactivated effluent treatment decanter of a complete tannery (beamhouse to finished leather) for the treatment of wastewater of a tannery proc

Expression of microRNA-379 reduces metastatic spread of prostate cancer

Introduction: Prostate cancer (PCa) is the most common type of cancer in males, and the metastatic form is a leading cause of death worldwide. There are currently no curative treatments for this subset of patients. To decrease the mortality of this disease, greater focus must be placed on developing therapeutics to reduce metastatic spread. We focus on dissemination to the bone since this is both