Weight distinction from mass

When deriving material balance equations the rate of each component transformation in the reactor obeys the law of mass action. However, as distinct from the reactions with participation of exclusively low molecular weight substances, the... 

During tag decoding, secondary amines are released from individually selected beads by acid hydrolysis. Because of the ability to rapidly determine molecular weight, electrospray LC/MS provides a reliable means of identification through tag recognition. The selected amines would form ammonium ions having distinctive molecular masses. Based on those amines present, the reaction history... 

Atomic weights, as distinct from equivalent weights, were first obtained in the early 1800s by John Dalton, who indirectly inferred them from measurements on the masses of the relevant elements combined together. But there were complications in this apparently simple method that forced Dalton to make assumptions about the chemical formulas of the compounds in question. The key to this question is the valence, or combining power, of an element. For example, a univalent atom combines with hydrogen atoms in a ratio of 1 1 divalent atoms, such as oxygen, combine in a ratio of 2 1 and so on. 

The polymerisation reactions are statistically driven processes. Therefore, unlike some natural polymers such as DNA, synthetic polymers always show, due to the reaction mechanisms involved in the production processes, a certain distribution of molar mass and not a distinct molecular weight. The molar mass of S5mthetic polymers can range from some thousand g/mol up to some million g/mol. As an example. Figure 1.4 shows the normalised molar mass distribution (MMD) curves of two different polyethylene samples. 

The lipid body fraction in the fungus had lipid profiles which were distinct from those in the crude membrane fraction (Table 2). TTie lipid body fraction contained around 10-fold higher amount of lipids per unit mass of protein, in which TG and diacylglycerol (DG) were major components. Assuming mean molecular weight of TG, DG, and phospholipids as 885, 621, and 770 respectively, weight percentage of TG, DG, phospholipids, and protein in the lipid body fraction was calculated from Table 2 as 72,... 

Dienes and polyenes show a pronounced molecular ion in the mass spectra and hence the molecular weight of polyenes can be determined by positive ion mass spectra. The easy removal of a 7r-electron from a diene is usually the reason for the distinct M +. The mass spectral investigation of conjugated polyenes is somewhat similar to that of aromatic structures, due to the high stability of the rearranged ions formed after the... 

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