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the present study assesses the relationship between the dimensions of perceived corporate social responsibility (PcsR) and consumer perceptions about a brand. the approach taken herein for PcsR is based on the sustain-centric paradigm. Under this model, PcsR comprises three dimensions: economic, social, and environmental. accordingly, a system of 11 hypotheses embedded in a conceptual framework is proposed and empirically tested. Measurements for the constructs in the hypotheses are assessed using a structured questionnaire with 521 respondents. the participants evaluated the brands of two major companies in Mexico. Path structural equation modeling is used to test the hypotheses. the results show that, of the three dimensions of PcsR, only economic and social dimensions affect variables related to brand perceptions. the proposed model suggests an explanatory power over attitude toward a brand through firm credibility, brand identification, and perceived functional value. the results imply that consumers disregard firm environmental responsibility when evaluating brands despite growing social efforts attempting to encourage environmental consciousness.

Using the present method, DNA concentration quantification appears to be simple, but with certain deficiencies due to inter-sample variability and low specificity. This is because total DNA concentration is measured without distinguishing as to whether it is tumour-related. We suggest that there is a correlation between DNA concentration and prognosis which enables an analysis of the natural history of the disease.

One of the biggest challenges for organizations, cities and countries is waste management. Currently, 1.3 million tons of solid wastes are generated in the cities and by 2025 it is estimated that this volume will increase up to 2.2 billion tons. Considering this, it is clear that strategies for the reduction of waste generation are needed. In order to achieve this arduous and critic task changes in education, culture and public policy are required and one of the strategies that emerge as one of the most effective is the "zero waste" programs. This paper shows the foundation of a zero waste program based on previous and successful experiences in institutions of higher education. It presents the characterization and quantification of waste, as well as the valorization of it and potential environmental and economic benefits of the implementation of this kind of programs in higher education institutions. Results show that reduction and valorization of waste generation is possible in academic sectors while other outcomes emerge, such as the generation of human capital for the implementation of this kind of programs in different sectors of society and, in that way, contribute in the transition towards sustainable development.