THIS is the fourth edition of a book which has been received with warm approval by English and Continental geometers. The first eight sections present no notable changes from the corresponding ...

Professor Xiao Xuezhang and Professor Chen Lixin's research team from Zhejiang University, in collaboration with related forces from Sun Yat-sen University, published their latest research findings ...

Element cycles are the biogeochemical pathways by which elements are transformed and moved through various states by geological and biological processes. Equal affinities of competing reactions at an ...

Cells are the smallest unit of life. Cells in multicellular plants and animals are arranged into tissues, organs and organ systems. Cells. Tissues. Organs. Organ systems. And the organism itself.