Experiences and meanings of trans men about breastfeeding in light of the Theory of Social Representations.

Objective: To analyze the experiences and meanings attributed by trans men to the breastfeeding process in light of the Theory of Social Representations.

Method: A qualitative, descriptive and exploratory study, carried out nationwide, with an intentional sample of five trans men who experienced breastfeeding and aged 18 or over. A semi-structured interview script was applied as a data collection instrument, using the Google Meet® platform, from September to October 2021.

Black transmasculine bodies in aesthetic intersections: an interview with Leonardo Peçanha.

This opinion article consists of an interview with Leonardo Peçanha, a Black trans man, a human rights and trans people rights activist and a researcher in Collective Health. In this interview, he reflects intersectionally on the place of beauty, body changes, and physical activity in the gender transition process of trans and transmasculine men. He discusses the (im)possibilities of trans people in high-performance sports and tells us about the Mister Trans Brazil beauty pageant contest.

The stingless bee Trigona spinipes (Hymenoptera: Apidae) is at risk from a range of insecticides via direct ingestion and trophallactic exchanges.

Background: The stingless bee, Trigona spinipes, is an important pollinator of numerous native and cultivated plants. Trigona spinipes populations can be negatively impacted by insecticides commonly used for pest control in crops. However, this species has been neglected in toxicological studies.

Lethal and sublethal effects of insecticides used in the management of Plutella xylostella (Lepidoptera: Plutellidae) on the predator Cycloneda sanguinea L. (Coleoptera: Coccinellidae).

Background: The application of synthetic insecticides is the main strategy used to reduce the damage caused by the diamondback moth Plutella xylostella in commercial Brassica crops. However, incorrect insecticide use can cause biological and ecological disturbances in agroecosystems. Cycloneda sanguinea is a generalist voracious predator and is distributed widely in cultivated and noncultivated ecosystems.

Zinc oxide pieces obtained by pressing and slip casting: physical, structural and photocatalytic properties.

Photocatalysis is a promising alternative for the decontamination of effluents. In this paper, immobilized ZnO-based photocatalysts were obtained by pressing and by slip casting. The cylindrical pieces were heat-treated at 800°C.