each control rod influences some part of the reactor more than others; complex adjustments can be made to maintain similar reaction rates and temperatures in different parts of the core. typical shutdown time for modern reactors such as the european pressurized reactor or advanced candu reactor is 2 seconds for 90% reduction, limited by decay heat .
islamic art encompasses the visual arts produced in the islamic world. islamic art is difficult to characterize because it covers a wide range of lands, periods, and genres, including islamic architecture, islamic calligraphy, islamic miniature, islamic glass, islamic pottery, and textile arts such as carpets and embroidery. it comprises both religious and secular art forms.
tianjin tʰjɛ́n.tɕín , historically romanized as tientsin, is a municipality and a coastal metropolis in northern china on the shore of the bohai sea.it is one of the nine national central cities in mainland china, with a total population estimated at 15,621,200 in 2016. its built-up or metro area, made up of 12 central districts all but baodi, jizhou, jinghai and ninghe , was .
using an alcohol lamp, wöhler heated alternating layers of beryllium chloride and potassium in a wired-shut platinum crucible. the above reaction immediately took place and caused the crucible to become white hot. upon cooling and washing the resulting gray-black powder he saw that it was made of fine particles with a dark metallic luster.
the value of sales of formaldehyde and derivative products was over $145 billion in 2003, about 1.2% of the gross domestic product gdp of the united states and canada. including indirect employment, over 4 million people work in the formaldehyde industry across approximately 11,900 plants in the u.s. and canada. permanent dead link
indian art consists of a variety of art forms, including painting, sculpture, pottery, and textile arts such as woven silk.geographically, it spans the entire indian subcontinent, including what is now india, pakistan, bangladesh, sri lanka, nepal, bhutan and eastern afghanistan.a strong sense of design is characteristic of indian art and can be observed in its modern and traditional forms.
tea longjing green tea being infused in a gaiwan type hot or cold beverage country of origin china introduced first recorded in china in 59 bc, though probably originated earlier tea plant camellia sinensis from köhler's medicinal plants, 1897 tea plant tea is an aromatic beverage commonly prepared by pouring hot or boiling water over cured leaves of the camellia sinensis, an evergreen .
the pear /ˈpɛər/ tree and shrub are a species of genus pyrus /ˈpaɪrəs/, in the family rosaceae, bearing the pomaceous fruit of the same name. several species of pear are valued for their edible fruit and juices while others are cultivated as trees.
mold welsh: yr wyddgrug is a welsh town and community in flintshire, on the river alyn.it is the county town and administrative seat of flintshire county council, and was the county town of clwyd from 1974 to 1996. according to the 2011 uk census, it had a population of 10,058.
history of the united states the history of the united states from 1865 until 1918 covers the reconstruction era, the gilded age, and the progressive era, and includes the rise of industrialization and the resulting surge of immigration in the united states.this article focuses on political, economic, and diplomatic history. this period of rapid economic growth and soaring prosperity in the .
early investigators isolated oxalic acid from wood-sorrel oxalis . members of the spinach family and the brassicas cabbage, broccoli, brussels sprouts are high in oxalates, as are sorrel and umbellifers like parsley. rhubarb leaves contain about 0.5% oxalic acid, and jack-in-the-pulpit arisaema triphyllum .
approximately 71% of global tantalum supply in 2008 was newly mined, 20% was from recycling, and the remainder was from tin slag and inventory. tantalum minerals are mined in colombia, australia, brazil, china, ethiopia, and mozambique. tantalum is also produced in thailand and malaysia as a by-product.