Search results for "AA"

Space, scale and accents : constructing migrant identity in Beijing

2007

A Non-world : Chinese Perceptions of the Western International Order

2019

As the West struggles, China, economically and politically stable, has increased its criticism toward the Western-led international order. According to Chinese arguments, the ongoing decade has demonstrated that the Western liberal international order is no more capable of solving the troubles of the globalizing world. It is as if the Western political imagination has run out of steam and it is now the responsibility of China to take the lead in stabilizing the world. On the side of the official statements, Chinese theorists of world politics are envisioning a new alternative world order, which would be based on a historical, sinocentric system that was in place in East Asia for thousands o…

Tianxia, Kiina ja hegemonisen vakauden teoria

2020

Kiinassa on 2000-luvulla rakennettu kiinalaista maailmanpolitiikan teoriaa, joka ammentaa lännen sijaan Kiinan omasta historiasta ja älyllisestä traditiosta. Yksi eniten huomiota herättäneistä teoreettisista aloitteista on niin kutsuttu tianxia-teoria, jonka mukaan nykyinen kansallisvaltioihin pohjautuva kansainvälinen järjestelmä tulisi korvata Kiinan historiasta löytyvän tianxia-mallin mukaisella keskuskjohdetulla maailmanvaltiolla. Artikkeli vertaa tianxia-teoriaa hegemonisen vakauden teorian erilaisiin variantteihin ja esittää, että lähemmin tarkasteltuna tianxia-teorian ajatukset ovat varsin samankaltaisia jo vakiintuneiden teorioiden ajatusten kanssa. Tianxia theory is one of the most…

Organizational dissent and workplace freedom of speech : a qualitative study of young professional intra-urban migrant workers in Shanghai

2014

Chinese economy reform triggered the largest domestic labor migration in human history. These 150 million migrant workers are treated as second-rate citizens in urban cities because of the discriminatory household registration system: Hukou. Previous studies have predominantly focused on blue-collar migrants while the professional workers, the potential permanent city dwellers, received little attention. This study attempts to fill this gap by exploring the perception of workplace freedom and preference of dissent strategy among professional migrant workers in Shanghai. Eight young and well-educated migrants participated in this study through semi-structured online interviews. This study no…

Fuel Cell Performances of Bio-Membranes Made of Chitosan-Polyelectrolyte Thin Films and Nanowires into Anodic Alumina Membranes

2012

Chitosan (CS) / Phosphotungstic acid (PTA) polyelectrolytes in the shape of thin films and nanowires supported by Anodic Alumina Membranes (AAM) have been fabricated through solution cast and filtration techniques, respectively. Their ability to function in a H2/O2 fuel cell under mild conditions (room temperature, low humidity and low Pt loading) is proved for the first time. The fabricated membrane electrode assemblies produce power peaks of ~20 mW cm-2 for both films and nanowires. The CS/PTA films (20-40 μm thick) are able to produce a quite constant power density of ~10 mW cm-2 recorded for at least 7 h. The gradual decrease of the power output with time observed for CS/PTA nanowires i…

Iron as a source of color in river waters.

2015

Organic chromophores of total organic carbon (TOC) and those of iron (Fe) contribute to the color of water, but the relative contributions of colored organic carbon (COC%) and Fe (Fe%) are poorly known. In this study, we unraveled Fe% and COC% in 6128 unfiltered water samples collected from 94 Finnish river sites of contrasting catchment properties. According to regression analysis focusing on TOC alone, on average 84% of the mean TOC consisted of COC, while 16% was non-colored or below the color-detection limit. COC and Fe were much more important sources of color than phytoplankton (chlorophyll a as a proxy) or non-algal particles (suspended solids as a proxy). When COC and Fe were consid…

Effects of elevated production of autochthonous dissolved organic matter on the freely dissolved concentration of cadmium

2018

Eutrophication enhances the production of autochthonous dissolved organic matter (DOM), which is a major driving factor behind the impairment of many aquatic ecosystems. In a mesocosm study, we investigated the effects of the abundance and composition of DOM on the potential bioavailability of cadmium (Cd) caused by eutrophication, using three-dimensional excitation-emission matrix fluorescence spectroscopy integrated with tangential flow ultrafiltration technology. The complexing capacity of DOM-Cd and the sorption distribution coefficient between DOM and the bulk solution was calculated based on a 1 : 1 complexation model. The fluorescent DOM was decomposed into three components (one prot…

p53-Mediated downregulation of H ferritin promoter transcriptional efficiency via NF-Y.

2008

The tumor suppressor protein p53 triggers many of the cellular responses to DNA damage by regulating the transcription of a series of downstream target genes. p53 acts on the promoter of the target genes by interacting with the trimeric transcription factor NF-Y. H ferritin promoter activity is tightly dependent on a multiprotein complex called Bbf; on this complex NF-Y plays a major role. The aim of this work was to study the modulation of H ferritin expression levels by p53. CAT reporter assays indicate that: (i) p53 overexpression strongly downregulates the transcriptional efficiency driven by an H ferritin promoter construct containing only the NF-Y recognition sequence and that the phe…

Preparation of Pd coated anodic alumina membranes for gas separation media

2007

Different procedures of Pd electroless deposition onto anodic alumina membranes were investigated to form a dense metal layer covering pores. The main difficulty was related to the amorphous nature of anodic alumina membranes, determining low chemical stability in solutions at pH > 9, where Pd plating works more efficiently. As a consequence, it was necessary to find the operative conditions allowing Pd deposition without damaging the membrane: to reduce alumina dissolution, the plating bath was buffered at pH 8.5 by addition of either NaHCO 3 or Na 2 B 4 O 7 ·H 2 O. Acceptable conversion of Pd was found after a deposition time of 3 min. Single and multiple deposition steps (each lasting 3 …

Determination of alternative and conventional chelating agents as copper(II) complexes by capillary zone electrophoresis—The first use of didecyldime…

2006

Abstract A capillary zone electrophoresis (CZE) method for analyzing 11 chelating agents [β-alaninediacetic acid (β-ADA), trans-1,2-diaminocyclohexane- N , N , N ′, N ′-tetraacetic acid (CDTA), diethylenetriaminepentaacetic acid (DTPA), ethylenediaminetetraacetic acid (EDTA), N -(2-hydroxyethyl)ethylenediamine- N , N ′, N ′-triacetic acid (HEDTA), N -(2-hydroxyethyl)iminodiacetic acid (HEIDA), iminodiacetic acid (IDA), methylglycinediacetic acid (MGDA), nitrilotriacetic acid (NTA), 1,3-diaminopropane- N , N , N ′, N ′-tetraacetic acid (PDTA) and triethylenetetraaminehexaacetic acid (TTHA)] as negatively charged copper(II) complexes has been established. Both conventional and alternative che…