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Preparation and Analytical Properties of Amphoteric Chelating Resin
The chelating ion exchange resin AFM was synthesized by condensation of anthranilic acid with formaldehyde and m-cresol in DMF media at 100 o C ± 6 o C. The identification of resin structure was performed by elemental and FTIR analysis. The thermodynamic parameters such as activation energy (E a ), entropy (S*), enthalpy (H*) and free energy (G*) for thermal decomposition were calculated from thermal data. The morphology of AFM resin shows transition material between crystalline and amorphous phase. The rate of exchange was rapid. i.e. t 1/2 < 22 min for Pb(II) and pH dependence of exchange of metal ions on the resin has been determined for several metal ions [Ni(II), Cu(II), Zn(II), Cd(II) and Pb(II)]. Successive separations and recovery of some pair of metal ions [Pb(II)-Cd(II), Pb(II)-Zn(II) and Zn(II)-Cu(II)] have been performed by using distribution coefficient (K d ).
Traditions of facet theory, or a garden of forking paths?
2012
Abstract This socio-historical enquiry contrasts historical and contemporary facet theory. After examining vagaries in terminology for key concepts such as facet, facet analysis and facet theory, as used by different researchers and different schools of thought, the author concludes with a call for the creation of operational definitions and functional requirements to enhance, amplify or extend current practices.
Journal of Mediterranean Archaeology, 2002
Over the past 20 years, the classical farmstead has become an essential categorical term in the literature of Greek survey archaeology. This paper traces the development of the category ‘farmstead’ out of the conceptual paradigm of settlement archaeology. It is argued that the tendency to categorize classical-period artifact clusters as ‘farmsteads’, without understanding the role of cultural processes in forming the archaeological record, creates a false dichotomy between ‘site’ and ‘off-site’ scatter. This paper applies a model of cultural formation processes developed in household archaeology in the Americas to the formation of domestic artifact assemblages in classical Greece. It presents a variety of literary, epigraphic, and archaeological evidence from 5th- and 4th-century Athens to delineate the cultural formation processes operative in both town and country in that society. This paper argues that classical farmsteads and landscapes represent accumulated debris generated by repeated behaviors of habitation, discard, recycling, and abandonment. The typical ‘farmsteads’ recognized in intensive survey represent only a narrow range of the signatures of habitation for the classical period; low density scatters of pottery and tiles, in particular, represent a signature of habitation that archaeologists have rarely interpreted as evidence for habitation.
Tacit knowledge of caring and embodied selfhood
Sociology of Health & Illness, 2009
The tacit knowledge paradigm is gaining recognition as an important source of knowledge that informs clinical decision-making. It is, however, limited by an exclusive focus on knowledge acquired through clinical practice, and a consequent neglect of the primordial and socio-cultural significance of embodied selfhood, precisely what provides the foundational structure of tacit knowledge of caring and facilitates its manifestation. Drawing on findings from a qualitative study of 43 dementia care practitioners in Ontario, Canada that utilised researchbased drama and focus group methodology, we argue that embodied selfhood is fundamental to tacit knowledge of caring. Results are analysed drawing upon the theoretical precepts of embodied selfhood that are rooted in Merleau-Ponty's (1962) reconceptualisation of perception and ) notion of habitus . We conclude with a call for further exploration of the body as a site of the production of tacit knowledge. rooted in Merleau-Ponty's (1962) reconceptualisation of perception and Bourdieu's notion of habitus (1977, 1990) provide the theoretical framework for the articulation of the body as a site for the production of tacit knowledge of caring. Findings are drawn from a qualitative study of 43 Canadian dementia care practitioners. The findings suggest that social and cultural habits, movements, and other physical cues disclose significant information about the individuality of care recipients, which brings their personhood into focus for practitioners. In addition, practitioners use their own bodily dispositions to make meaningful connections with their care recipients in the course of providing dementia care. We conclude with a call for further exploration of the relationship between embodied selfhood and tacit knowledge in the context of caring.
Ophiolitic rocks (chromitites and serpentinized peridotites) were petrologically examined in detail for the first time from Rayat, in the Iraqi part of the Zagros thrust zone, an ophiolitic belt. Almost all the primary silicates have been altered out, but chromian spinel has survived from alteration and gives information about the primary petrological characteristics. The protolith of the serpentinite was clinopyroxene-free harzburgite with chromian spinel of intermediate Cr# (= Cr/[Cr + Al] atomic ratio) of 0.5 to 0.6. The harzburgite with that signature is the most common in the mantle section of the Tethyan ophiolites such as the Oman ophiolite, and is the most suitable host for chromitite genesis. Except for one sample, which has Cr# = 0.6 for spinel, the Cr# of spinel is high, around 0.7, in chromitite. The variation in Cr# of spinel in chromitite observed here has been also reported in the Oman ophiolite. The peridotite with chromitite pods exposed at Rayat was derived from an ophiolite similar in petrological character to the Oman ophiolite, one of the typical Tethyan ophiolites (fragments of Tethyan oceanic lithosphere). This result is consistent with the previous interpretation based on geological analysis.
It is unsatisfactory to find that in the literature on employee performance appraisal management, enough attention has not been paid to the important factors in the socio-cultural context of the society in which organizations concerned are sited. Employing both qualitative and quantitative research approaches, the study explored the influence of certain socio-cultural values on performance appraisal practices in selected institutions in Ghana. Thus, the paper assesses some of the often neglected sociocultural factors and how they serve to moderate employee performance appraisal management in work organisations. It specifically discusses the relational orientation of the African and how it influences performance appraisal practices in organisations. Our hope is to enhance the understanding of researchers and human resource management practitioners of the realities of performance appraisal management within specific sociocultural contexts. The results reveal that in spite of the existence of established formal systems of performance appraisal in the universities studied, most of the officials in charge of appraisal face the challenge of objectivity and fairness due to their relational orientation. Virtually all the factors that pose this challenge to the officials are socio-cultural in nature. The express desire to maintain a good relation with subordinates and colleagues makes officials compromise on fairness and objectivity in appraising their subordinates. According to the study results, some managers believe that it is prudent to overrate one’s cordial relation with colleagues and subordinates over a strict adherence to institutional provisions provided one does not break any serious rule.