Search results for "Timo"

COMMUNICATION. OBSERVATIONS ON THE 121-Sb MÖSSBAUER PARAMETERS OF ANTIMONY (III) COMPOUNDS FEATURING A PYRAMIDAL SbS3SKELETAL UNIT

1991

Abstract A linear correlation between the chemical isomer shift and the quadrupole coupling constant for a number of antimony tris-thiolates has been evidenced. This behaviour can be rationalized on considering a modulation of the s/p character of the lone pair of electrons from the influence of secondary bonds.

Antimony-121 Mössbauer spectra of organoantimony derivatives containing Sb-Sb bonds

1994

121-Sb Mossbauer data are reported for a number of organoantimony rings and catena-stibanes. These compounds are representative of RSb(Sb)2 and R2SbSb type of coordination, and spectral parameters are compared and discussed in relation to RSbCl2 and R2SbCl systems. Although the trend in isomer shift is similar, the present compounds show slightly less negative isomer shift values together with a remarkable reduction of the quadrupolar coupling constant. A rationalization of the quadrupolar interaction in the above series of compounds appears feasible by using point charge model calculations whose results, in terms of bonding, indicate a large contribution of p-electron density along Sb-Sb b…

Opportunities, Risks, and Failures of the Retail System After COVID-19

2022

Covid-19 has had an impact on world food systems and has in some ways in the short term resulted in changing consumer habits. The research analyzed how the food distribution system reacted to the impact of Covid-19. The research highlights that the food distribution system has been able to react to the impact of Covid-19 by leading to security in the aprovigioment of purchasing

Testimonio y visualidad. De la visión del ciego a las imágenes del vacío

2017

¿Cuál es la relación entre testimonio y visualidad? ¿De qué forma se ha dado testimonio visual de la violencia de Estado? ¿De qué modo las imágenes pueden capturar o representar la experiencia del derrumbe, de la desestructuración y del vacío que caracteriza a la vivencia histórica de la represión militar? Este trabajo trata de abordar esas preguntas a partir de dos ejemplos concretos de diferente naturaleza, pero que permiten plantear algunas cuestiones mayores sobre la relación entre testimonio y visualidad. Se trata de ejemplos lejanos en el tiempo, pero vinculados por su rechazo a pensar la testimonialidad visual desde el paradigma de la referencialidad. La vastísima obra pictórica de G…

Growing old with antiretroviral therapy or elderly people in antiretroviral therapy: two different profiles of comorbidity?

2022

Abstract Background In persons living with HIV (PLWH), the burden of non-communicable chronic diseases increased over time, because of aging associated with chronic inflammation, systemic immune activation, and long-term exposure to the combination antiretroviral therapy (ART). Methods To explore the association of chronological age, age at first ART, and exposure to ART with non-communicable chronic diseases, we performed a cross-sectional analysis to evaluate the prevalence of comorbidities in patients enrolled in the SCOLTA Project, stratified by groups of chronological age (50–59 and 60–69 years) and by years of antiretroviral treatment (ART, ≤ 3 or > 3 years). Results In 1394 subjec…

Crystal chemistry and redox behaviour of antimony strontium calcium perovskites

2000

The compound Sr2Sb1.4Ca0.6O6 and their reduced forms Sr2Sb1.4Ca0.6O5.17 and Sr2Sb1.4Ca0.6O4.84 have been prepared and characterized by powder X-ray diffraction, electron diffraction, iodometric analyses and thermogravimetric analysis. The three phases with different oxygen stoichiometries are structurally related to the perovskite and show symmetry distortions from the ideal cubic structure (with cell parameter ap). The crystal structure of Sr2Sb1.4Ca0.6O6 may be refined by the Rietveld method from powder X-ray diffraction data using the space group P21/n, and the cell parameters a=5.776(2), b=5.7837(2), c=8.1718(3) A, β=90.039(3)° with the same structural model than for previously studied …

J. Vidal-Beneyto: Intelectual y compromiso ético

2010

Multisensory discourse resources : decolonizing ethnographic research practices

2020

Researchers have attempted to address the intersection of multisensory and multimodal discourse practices from an interactional perspective. This study argues for the value of experiential, non-interactional multisensory discourse resources and proposes a conceptual framework of multisensory discourse resources to bridge visual and family language ideology ethnography. A year-long ethnographic case study of three Nepalese families (immigrant and transmigrant), consisting of 150 h of observational data triangulated with qualitative interviews, posed two questions: (1) How do transnational families, in the homescape, use multisensory discourse resources to provide cultural, national, religiou…

Cheese as a food souvenir in Sicily

2022

Souvenirs are elements of territorial communication, and they are examples of the marketing strategy of destinations. Souvenirs are objects that allow us to remember moments we have experienced and places we have visited. Drawing on the close relationships between places and souvenirs, this paper analyses cheese as a food souvenir in the island of Sicily. The method is based on a qualitative design which includes visits and interviews with local sellers in the food markets and food shops in Palermo, with the objective to reveal how cheese is protected and promoted as a symbol of Sicilian culture and heritage from a marketing perspective. Results of the paper show that cheeses made in Sicily…

Understanding the consumption of plant-based meat alternatives and the role of health-related aspects. A study of the Italian market

2023

One possible solution to address some of the current health and environmental challenges we are facing is to choose plant-based meat alternatives (PBMAs). However, from the literature, the role of PBMA products in the consumer’s diet and whether they are a substitute for red meat consumption or if they only represent an enrichment function is not clear. Moreover, little is known about how health-related aspects affect consumer choices. This study tries to understand the role of PBMAs in consumption habits and the effects of health-related aspects in PBMA consumption. The results show that PBMA consumption occurs in substitution to red meat, and it is associated mainly with healthy and susta…