Lead exposure and its relationship with fecal cortisol levels in black howler monkeys (Alouatta pigra).

Efficiently detecting early environmental threats to wildlife is vital for conservation. Beyond obvious dangers like habitat loss or deforestation, our study focuses on one of the most hazardous toxic metals for wildlife: lead (Pb). Pb is a widespread, cumulative, and insidious environmental pollutant that can trigger a wide range of physiological, biochemical, and behavioral disorders.

Marketing strategies for waste recycling: a bibliometric analysis towards the circular economy.

Companies have adopted green marketing and marketing strategies to position themselves in consumer preferences and combat the problem of accelerated consumption of resources that has compromised the planet's regenerative capacity, where the circular economy emerges as a solution to move towards responsible production and consumption patterns. From waste recycling marketing strategies, a descriptive analysis of 120 documents from the SCOPUS database was carried out using bibliometric techniques to know the existing state of the art for the period 1977-2021. The results indicate that the annual scientific production increased in the last ten years by over 200% for 2019, highlighting the USA, China, UK, Germany, and India, and Mexico is in position 22.

Circular economy strategy and waste management: a bibliometric analysis in its contribution to sustainable development, toward a post-COVID-19 era.

A descriptive analysis of 416 documents was performed using bibliometric techniques, in order to gather existing knowledge in circular economy focusing on waste management (2007-2020). The results of this study indicate that annual scientific production increased 94% in the last 5 years, highlighting the countries of Italy, Spain, the UK, China, Brazil, and India. Between the most cited documents stand out those related to calorific value of municipal solid waste and waste to energy technologies for achieving circular economy systems.

New investigation in PVP-mediated synthesis of noble metallic nanomaterials.

As one of the most heavily used starting materials in metallic nanostructure syntheses, PVP has made a series of revolutionary successes. However, the true role of PVP still has not been fully understood. Herein, designed reactions and NMR analyses have been done to prove the redox reaction in PVP-mediated synthesis of metallic nanomaterials.