Hidden oxidation

Some researchers have called this reaction hidden oxidation (35)... 

Figure 5.2. Hidden oxidation as a measure of future stability, based on anisidine value, oxidative dimers and high moleeular weight decomposition products (relatively high in n-3 polyunsaturated oils).

The formation and decomposition of oxidative polymers during soybean oil processing has been referred to as hidden oxidation because it caimot be measured by the conventional peroxide value determination. However, these... 

One energy source that first appeared to be highly attractive was nuclear power. The problem with nuclear power is that some costs were hidden in its initial development. Especially pernicious is the disposal of uranium oxide fuel after it has become depleted. It can be reprocessed, but at considerable expense, and the product plutonium can be used for weapons. In the United States the plan is to bui y... 

Redox reactions are more complicated than precipitation or proton transfer reactions because the electrons transferred in redox chemishy do not appear in the balanced chemical equation. Instead, they are hidden among the starting materials and products. However, we can keep track of electrons by writing two half-reactions that describe the oxidation and the reduction separately. A half-reaction is a balanced chemical equation that includes electrons and describes either the oxidation or reduction but not both. Thus, a half-reaction describes half of a redox reaction. Here are the half-reactions for the redox reaction of magnesium and hydronium ions ... 

Another major hidden problem for the ecosystem s systematic development is a possible local physical disaster, as mentioned earlier. Events such as meteorite strikes and massive volcanic eruptions could cause and have caused considerable disruption in what could be called steady progress, but the general trend on the surface towards oxidation has and will resume after such set-backs due to the very nature of life s reductive chemistry. We turn away from all these considerations of the difficulties we face in any attempt to predict the future to make the statement... 

Lanthanum - the atomic number is 57 and the chemical symbol is La. The name derives from the Greek lanthanein for to be hidden or to escape notice because it hid in cerium ore and was difficult to separate from that rare earth mineral. It was discovered by the Swedish surgeon and chemist Carl-Gustav Mosander in 1839. In 1842, Mosander separated his lanthanium sample into two oxides for one of these he retained the name lanthanum and for the other he gave the name didymium (or twin). 

This conclusion is also supported by the fact that, in contrast to ssDNA, the oxidation signal coming from dsDNA is poorly developed at both GC and GC(ox). This is probably attributable to the electroactive A and G residues in dsDNA being inaccessible to the surface, while most bases in denatured DNA can freely interact with the GC(ox) surface. On the other hand, the hydrogen-bonded bases in native DNA are hidden within the double heUx, a serious steric barrier to electron transfer between the purine and the GC(ox). 

In 1839 Mosander heated some cerium nitrate and treated tire partly decomposed salt with dilute nitric acid. In the extract he found a new earth, which he named lanthana, meaning hidden, meanwhile retaining the old name, ceria, for the oxide which is insoluble in dilute nitric acid (7, 28, 45). In the same year, Axel Erdmann, one of Sefstrom s students, discovered lanthana in a new Norwegian mineral, which he named mosan-drite in honor of Mosander. 

These ligands form extremely stable cation inclusion complexes, called cryptates, In which the cation Is completely surrounded by the ligand and hidden Inside the molecular cavity, and this leads to a considerable Increase of the interionic distance In the ion pairs. It has been shown that such ligands have a marked activating effect on anionic polymerizations (4,5,6). Moreover, the aggregates are destroyed and simple kinetic results have been obtained In the case of propylene sulfide (7,8,9). ethylene oxide (9,10,11) and cycloelloxanes (12) polymerizations. Though the... 

The stereospecific deuterium labeling and subsequent photo-oxidation of the olefin 5 and similar olefins 6 and 7 revealed the hidden regioselectivity of the... 

---