The chemical era

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  • VALENTIN TURCHIN presents in The Phenomenon of Science an evolutionary scheme of the universe—one that begins on the level of individual atoms and molecules, continues through the origin of life and the development of plants and animals, reaches the level of man and self-consciousness, and develops further in the intellectual creations of man, particularly in scientific knowledge. He does not see this development as a purposeful or preordained one, since he accepts entirely the Darwinian law of trial and error.

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  • Hydrogen peroxide and catalyst solutions needed for Fenton's Reagent are usually added to the treatment area by pressure injection into one or more designated chemical oxidation injection wells, or gravity injection into one or more monitoring or other wells. In pressure injection, compressed air is used to sparge the ferrous iron catalyst and relatively large volumes of peroxide solution (e.g., hundreds to thousands of gallons) into the contaminated soil and groundwater over a short period of time (e.g., days).

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  • In the postgenomic era it is essential that protein sequences are annotated correctly in order to help in the assignment of their putative functions. Over 1300 proteins in current pro-tein sequence databases are predicted to contain a PAS domainbaseduponaminoacid sequence alignments.Oneof theproblemswith the current annotationof thePASdomain is that this domain exhibits limited similarity at the amino acid sequence level.

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  • Early Medieval Europe was a place of unrest; the medieval era was a time when not only nations but also lords of the manor fought for supremacy and battled to establish boundaries and kingdoms. Medieval history abounds with struggles between countries, between rival barons, and between neighbors. Large aspects of the medieval age are still in darkness to us today. Medieval life was uncertain, and families were often on the move: fleeing from conflict, or traveling to lend support to the warlord of their choice.

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  • Be sides pro vid ing food, the driv ing force be- hind in creased live stock pro duc tion, live stock have other valu able uses. Live stock re main the most im- por tant if not the sole form of non hu man power avail able to poor farm ers in much of the de vel op ing world. The poor, in par ticu lar, use fer til izer from live stock op era tions, es pe cially when ris ing pe tro- leum prices make chemi cal fer til iz ers un af ford able. Live stock also store value and pro vide in sur...

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  • A notable achievement by the U.S. Army as of early 2012 is that 90 percent of the legacy chemical weapons and other chemical warfare materiel (CWM) from the Second World War and cold war eras and then stockpiled by the United States have been safely destroyed. 1 Whatever cumulative risk had been posed by the existence of this CWM to communi-ties surrounding the six military sites where it was guarded and safely maintained since the mid-twentieth century is now zero.

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  • This building technique was adopted in the predigital era by architects such as Le Corbusier. The roof of the chapel at Ronchamp, for example­ likened to an airplane wing by the architect-is designed and built as a series of structural concrete ribs, tied together laterally by crossbeams. A paper model of the roof clearly shows the intentions for the internal construction.

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  • How to hone your analytical skills and obtain high-quality data in the era of GMP requirements With increased regulatory pressures on the pharmaceutical industry, there is a growing need for capable analysts who can ensure appropriate scientific practices in laboratories and manufacturing sites worldwide.

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  • Romans held Greek civilization in high regard and, like us, considered fifth-century-BC Greece to be the region’s golden age, a time characterized by refined artistic and cultural production, scholarship, and military strength. During his reign five hundred years later, Augustus sought to align his rule with this era and promote a rebirth of the golden age of Greece in Rome. Augustus’s interest in Greek art and culture strengthened Roman reverence for classical Greek art, philosophy, and intellectual life.

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  • Transportation of species to areas outside their native ranges has been a feature of human culture for millennia. During this time such activities have largely been viewed as beneficial or inconsequential. However, it has become increasingly clear that human-caused introductions of alien biota are an ecological disruption whose consequences rival those of better-known insults like chemical pollution, habitat loss, and climate change. Indeed, the irreversible nature of most alien-species introductions makes them less prone to correction than many other ecological problems.

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  • There are other bizarre and unkind ramifications. For example, the transport of POPs depends on temperature; in a process known as the "grasshopper effect", these chemicals jump around the globe, evaporating in warm places, riding the wind and particles of dust, settling to Earth in cool spots, and then vaporizing and moving on again. As the POPs move away from the equator they encounter cooler climates with less evaporation. The result is a general drift of these pollutants toward the Poles and mountain areas.

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  • For surface treatment processes of metals and plastics by electrolytic and chemical processes using solvents, the Integrated Pollution, Prevention and Control (IPPC) Directive 96/61/EC applies. Industrial production processes account for a considerable share of overall pollution in Europe (for emissions of greenhouse gases and acidifying substances, wastewater emissions and waste). The EU has established a set of common rules for permitting and controlling industrial installations in this IPPC Directive.

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  • We live in an era with unparalleled opportunities to practice disease prevention based on knowledge of the earth environment. Although globally distributed early warning systems can monitor physical hazards such as earthquakes and tsunamis, chemical hazards on the other hand—whether actual or potential and natural or anthropogenically induced—remain difficult to accurately identify in time and space. Such hazards often have lengthy asymptomatic latency periods before disability or disease becomes evident....

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