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Progressive Transformation (progressive + transformation)

Distribution by Scientific Domains

Humanities and Social Sciences	40%

Selected Abstracts

Transformation of haematite and Al-poor goethite to Al-rich goethite and associated yellowing in a ferralitic clay soil profile of the middle Amazon Basin (Manaus, Brazil)

EUROPEAN JOURNAL OF SOIL SCIENCE, Issue 5 2005
E. Fritsch
Summary The red and yellow colours of ferralitic soils in the tropics have for long intrigued pedologists. We have investigated the upward yellowing in a 10-m thick profile representative of the Ferralsols of the plateaux of the Manaus region of Brazil. We determined changes in the nature and crystal chemistry of their Fe oxides by optical and Mössbauer spectroscopy as well as Rietveld refinement of X-ray diffraction patterns. We attribute the upward yellowing of the soil to a progressive transformation of the Fe oxides at nearly invariant iron contents. Aluminium in contrast is strongly mobilized in the uppermost clay-depleted topsoil where there is preferential dissolution of kaolinite and crystallization of gibbsite. Haematite decreases from 35 to 10% of the Fe oxides from the bottom to the top of the profile and the particles become smaller (75,10 nm). Its Al for Fe-substitution remains almost unchanged (10,15 mol %). The average Al-substitution rate of goethite increases from 25 to 33 mol %, and its mean crystal diameter remains in the range 20,40 nm. The proportion of Al-rich goethite (33 mol %) increases at the expense of less Al-substituted Fe oxides (haematite and goethite). This conversion with restricted transfer of iron means that the amount of Al stored in Fe oxides gradually increases. Kaolinite, haematite and Al-poor goethite are thus witnesses of earlier stages of ferralitization of the soil. In contrast, Al-rich goethite and gibbsite initiate the alitization (or bauxitization) of the soil. They correspond to the last generation of soil minerals, which most likely reflects the present-day weathering conditions. The progressive replacement of kaolinite, haematite and Al-poor goethite by new generations of Al-rich goethite and gibbsite attests to greater activities of water and aluminium and smaller activity of aqueous silica in the topsoil than in the subsoil. We interpret this as a consequence of longer periods of wetting in the topsoil that could result from soil aging, more humid climate or both. [source]

Social Networks and the Elderly: Conceptual and Clinical Issues, and a Family Consultation

FAMILY PROCESS, Issue 3 2000
Carlos E. Sluzki M.D.
After a general introduction to the construct "social networks," this article discusses the progressive transformation of the personal social network,family, friends and acquaintances, work and leisure relationships, et cetera,as individuals reach an advanced age. This is followed by a summary and discussion of a clinical consultation, with an emphasis on the reciprocal influence between individual and social network. [source]

Follicular lymphoid hyperplasia of the oral cavity representing progressive transformation of germinal center,

APMIS, Issue 3 2005
Case report
Follicular lymphoid hyperplasia (FLH) of the oral cavity is a rare and poorly understood lymphoproliferative disorder. We present a case of FLH of the oral cavity presenting with progressive transformation of germinal center (PTGC). The patient was a 49-year-old Japanese woman presenting with a hard mass in the right cheek. The resected specimen contained numerous lymphoid follicles with active germinal centers and a portion of the lymphoid follicles exhibited PTGC. The PTGCs contained a few large lymphoid cells resembling lymphocytic and histiocytic Reed-Sternberg cells of nodular lymphocyte-predominant Hodgkin lymphoma. The PTGC was surrounded by groups of epithelioid cells. In situ hybridization studies demonstrated strong expression of Epstein-Barr virus (EBV)-encoded small RNA in scattered large lymphoid cells in the PTGC. Although the etiology of FLH of the oral cavity remains unclear, the present case suggests that a subset of FLH of the oral cavity appears to be an EBV-associated lymphoproliferative disorder. [source]

Transforming Possession: Josephine and the Work of Culture

ETHOS, Issue 2 2008
Bambi L. Chapin
After a 30-year career as a priestess during which she became renowned for deep possession trances, firewalking, and blood sacrifices, she no longer participates in these activities. The analysis of this case argues that problematic dissociation outside a ritual context can be used in and transformed by involvement in culturally available possession rituals to promote healing. This counters Melford Spiro and others who have viewed possession experiences as necessarily abnormal, psychotic, and symptomatic of mental disorder. It supports Gananath Obeyesekere's assertion that engagement with these symbolic systems can lead to "progressive transformations." Parallels between this priestess' lifestory and Western psychotherapy extend Obeyesekere's conception of "the work of culture" beyond the domain of meaning and symbol to include roles for embodied practice and interpersonal relationships. [spirit possession, Sri Lanka, dissociation, healing, mental health] [source]