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Wilhelm His Sr. (9 July 1831 – 1 May 1904) was a Swiss anatomist and professor who invented the microtome.By treating animal tissue with acids and salts to harden it and then slicing it very thinly with the microtome, scientists were able to further study the organization and function of tissues and cells under a microscope.
Precision-cut kidney slices refer to thin sections of the kidney tissue that are prepared using a microtome to study kidney functions, drug metabolism or disease processes. Researchers use these slices to study the impact of substances on renal function. [13] [14] This includes drug metabolism [15] [16] and the effects of toxic substances. [17]
Microtonality is the use in music of microtones — intervals smaller than a semitone, also called "microintervals".It may also be extended to include any music using intervals not found in the customary Western tuning of twelve equal intervals per octave.
Unlike much western music, Arabic music includes quarter tones halfway between notes, often through the use of stringed instruments (like the oud) or the human voice. Further distinguishing characteristics of Middle Eastern and North African music include very complex rhythmic structures, generally tense vocal tone, and a monophonic texture .
Textiles are made from both animal fibres, including wool and silk, [24] [25] and plant fibres, including cotton and flax. [22] Dyestuffs too are made both from animals, including carmine [26] [27] from the bodies of insects, from plants including indigo [28] and madder, [29] and from lichens. [30]
Microbial food cultures are live bacteria, yeasts or moulds used in food production. Microbial food cultures carry out the fermentation process in foodstuffs. Used by humans since the Neolithic period (around 10 000 years BC) [1] fermentation helps to preserve perishable foods and to improve their nutritional and organoleptic qualities (in this case, taste, sight, smell, touch).
ASTt groups were the first human occupants of Arctic Canada and Greenland. This was a terrestrial entity that had a highly distinctive toolkit based on microblade technology . Typically tool types include scrapers , burins and side and end blades used in composite arrows or spears made of other materials, such as bone or antler .
Human food is food which is fit for human consumption, and which humans willingly eat. Food is a basic necessity of life, and humans typically seek food out as an instinctual response to hunger ; however, not all things that are edible constitute as human food.