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These birds, which include African sunbirds and American hummingbirds, obtain all the energy they need from the sugar contained in nectar. When drinking sucrose-dominant nectar, sunbirds and hummingbirds have to digest the sucrose into glucose and fructose before they can absorb it into their bloodstreams. Promerops 319 16 March 2021 All the world's continents except Europe and Antarctica have bird species that rely almost exclusively on nectar as a food source. [Extracted from the article]

The article discusses several researches on advance fuel cell technology. Researcher Y. H. Percival Zhang and his team from Virginia Tech has used xylose successfully in hydrogen production. Doctor Michael Leung Kwok-hi and his team have developed a novel fuel cell for wastewater purification. A research team from Cornell Energy Materials Center has revealed the impact of ordered catalyst in boosting fuel cell output.