degree of hydration
51Properties of concrete — Concrete has relatively high compressive strength, but significantly lower tensile strength, and as such is usually reinforced with materials that are strong in tension (often steel). The elasticity of concrete is relatively constant at low… …
52Human nutrition — For aspects of nutrition science not specific to humans, see Nutrition. Human nutrition is the provision to humans to obtain the materials necessary to support life. In general, humans can survive for two to eight weeks without food, depending on …
53Soil — For other uses, see Soil (disambiguation). A represents soil; B represents laterite, a regolith; C represents saprolite, a less weathered regolith; the bottommost layer represents bedrock …
54Frog — For other uses, see Frog (disambiguation). Frogs Temporal range: Triassic–present …
55Pu-erh tea — Pu erh, Pu er tea, Puer tea or Bolay tea is a type of tea made from a large leaf variety of the tea plant Camellia sinensis and named after Pu er county near Simao, Yunnan, China. Pu erh tea can be purchased as either raw/green (sheng) or… …
56Overweight — This article is about the medical term. For the stock market term, see overweight (stock market). Overweight Classification and external resources …
57skin disease — ▪ pathology Introduction any of the diseases or disorders that affect the human skin. They have a wide range of causes. General features Although most diseases affecting the skin originate in the layers of the skin, such abnormalities are… …
58Climate change, industry and society — See also: Avoiding dangerous climate change and Effects of climate change on humans This article is about climate change, industry and society. Contents 1 Vulnerability 1.1 General effects 1.2 Human settlement …
59Collagen — Tropocollagen triple helix Collagen /ˈkɒlədʒɨn/ is a group of naturally occurring proteins found in animals, especially in the flesh and connective tissues of mammals.[1] It is the main component of connectiv …
60Hemoglobin — Hemoglobin, human, adult (heterotetramer, (αβ)2) Structure of human hemoglobin. The protein s α and β subunits are in red and blue, and the iron containing heme groups in green. Fro …
