Agroecological producers shortening food chains during Covid-19: opportunities and challenges in Costa Rica.

The Covid-19 pandemic has compounded the global food insecurity crisis, disproportionately affecting the consumers, farmers, and food workers (UN in Policy brief: impacts of COVID-19 on food security and nutrition, 2020, https://www.un.org/sites/un2.

Emergency Presentation of Groin Hernia: Severity and Outcomes of Treatment in a Nigerian Tertiary Hospital.

Background And Objective: Complications arising from groin hernias carry significant risks that task the resources of the surgeon and patient and, whenever feasible, should be avoided. In the past, obstructed groin hernia was the most common cause of intestinal obstruction in many parts of tropical Africa, but the trend appears to be changing. The aim of this study was to determine the severity and operative outcomes of complicated groin hernias in our centre.

Scaling of stem diameter and height allometry in 14 neotropical palm species of different forest strata.

Tropical palms reach tree-like heights without a vascular cambium through sustained cell expansion and lignification of primary tissues, but only a fraction of palms have been explored in their allometric relationships. Here, our main question was to determine how palms depart from the traditional mechanical models developed for trees and how they approach the theoretical buckling limit. We analyzed the stem allometry of 1603 palms of 14 species from different strata at 10 sites in Costa Rica and Peru.