Severing, Carl

It has also been possible to determine the x-ray structures of classic zinc finger motifs from several proteins bound to specific DNA fragments. We will here describe one such structure containing three zinc fingers from a mouse protein, Zif 268, which is expressed at an early developmental stage of the mouse. Nikola Pavletich and Carl Pabo at the Johns Hopkins University School of Medicine, Baltimore, determined the x-ray structure to 2.1 A resolution of a recombinant polypeptide derived from Zif 268 bound to a 10-base... 

To convert N2 and H2 into ammonia at a reasonable scale, flow reactors are needed that can be operated at high pressures. Until then, high-pressure reactions were mainly carried out in batch processes. Carl Bosch at BASF developed the technology that enabled scaling up to several tons of ammonia per day at 300 bar. 

Carothers spent six years in Illinois warm and convivial atmosphere. For the first time, he was surrounded by passionately enthusiastic scientists, several of whom became staunch pillars of support in times of difficulty. Carl Speed Marvel, two years older than Carothers but already Adams right-hand man, took the new student under his wing. Marvel found... 

Adams hired Carothers to stay on as an instructor, the lowest rung on the academic ladder, for 1800 a year. Carothers class lectures were low-key and conversational, like his written articles, but his students worked overtime. When one climbed through a laboratory window on Thanksgiving Day, he found the rest of his classmates already there. Carothers, Carl Marvel, Jack Johnson, and several graduate students formed an informal seminar group to talk chemistry over bootleg beer. 

Finally, paradigms frequently have the look of a sensible refuge in a chaotic sea of competing ideas. Monophyly is portrayed in precisely this way even if several alternative refuges are lurking on the horizon. For example, Carl Woese s alternative, which he calls the genetic annealing model (Woese,... 

The 23 defendants in the I. G. Farben Trial (the 24th defendant having been "severed" because of bad health) listen to the sentence being pronounced by the Tribunal on Carl Krauch. 

Le Chatelier s principle also predicts that the yield of ammonia is greater at higher pressures. High-pressure plants are expensive to huild and maintain, however. In fact, the first industrial plant that manufactured ammonia had its reaction vessel blow up. A German chemical engineer, Carl Bosch, solved this problem by designing a double-walled steel vessel that could operate at several hundred times atmospheric pressure. Modern plants operate at pressures in the range of 20 200 kPa to 30 400 kPa. 

The use of rotary desiccant wheels for dehydration has been practiced for several decades. Carl Munters [13] created the first rotary adsorbers by impregnating corrugated paper with LiCl and then ran the rotor using direct heat exchange to regenerate the sorbent. More recently Munters, NTI and others have developed improved adsorbents for rotary dehydrators. 

Interest in the nature of interactions between shortchain organic surfactants and large molecular weight macromolecules and ions with hydroxyapatite extends to several fields. In the area of carles prevention and control, surfactant adsorption plays an important role in the Initial states of plaque formation (1-5) and in the adhesion of tooth restorative materials ( ). Interaction of hydroxyapatite with polypeptides in human urine is important in human biology as hydroxyapatite has been found as a major or minor component in a majority of kidney stones ( 7). Hydroxyapatite is used in column chromatography as a material for separating proteins (8-9). The flotation separation of apatite from... 

Cerium was the first rare-earth element discovered, and its discovery came in 1803 by Jons Jakob Berzelius in Vienna. Johann Gadohn (1760—1852) also studied some minerals that were different from others known at that time. Because they were different from the common earth elements but were all very similar to each other, he named them rare-earth elements. However, he was unable to separate or identify them. In the 1800s only two rare-earths were known. At that time, they were known as yttria and ceria. Carl Gustav Mosander (1797—1858) and several other scientists attempted to separate the impurities in these two elements. In 1839 Mosander treated cerium nitrate with dilute nitric acid, which yielded a new rare-earth oxide he called lanthanum. Mosander is credited with its discovery. This caused a change in the periodic table because the separation produced two new elements. Mosander s method for separating rare-earths from a common mineral or from each other led other chemists to use... 

A stone quarry near the town of Ytterby in Sweden produces a large number of rare-earth elements. Carl Gustaf Mosander (1797-1858) discovered several rare-earths, including the rare-earth mineral gadolinite in this quarry in 1843. He was able to separate gadolinite into three separate, but closely related, rare-earth minerals that he named yttria (which was colorless), erbia (yellow color), and terbia (rose-colored). From these minerals, Mosander identified two new rare-earth elements, terbium and erbium. The terbia that was found was really a compound of terbium terbium oxide (Tb O )... 

As World War II loomed with America pushed into the war by the Pearl Harbor attack, the need for an independent rubber supply was critical. The government instituted several nationwide efforts including the Manhattan and Synthetic Rubber Projects. Carl Speed Marvel was one of the chemists involved in the Synthetic Rubber Project. 

Carl Lowig was born at Kreuznach on March 17, 1803. In his youth he studied pharmacy, but his later study was confined entirely to chemistry. He continued his investigation of the compounds of bromine for several years, and in 1829 published a monograph on Bromine and Its Chemical Relations. ... 

Carl H. Brubaker, Jr. I agree with Dr. Yalman that this represents a very complete piece of work, and I think, the majority of the conclusions are fairly clear cut. There is not much that can be added aside from speculation. I would hope that a little later Prof. Wilmarth or others will speculate about the structures of this transition state species, or several species of the pentacyanocobaltate(II) that are supposed to be the transition state complex, or an intermediate. 

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