Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Competition with

This product, given the abbreviation FOD (fuel-oil domestique) in France, still held a considerable market share there of 17 Mt in 1993. However, since 1973 when its consumption reached 37 Mt, FOD has seen its demand shrink gradually owing to development of nuclear energy and electric heating. FOD also faces strong competition with natural gas. Nevertheless, its presence in the French, European and worldwide petroleum balance will still be strong beyond tbe year 2000. [Pg.233]

The objective of any exploration venture is to find new volumes of hydrocarbons at a low cost and in a short period of time. Exploration budgets are in direct competition with acquisition opportunities. If a company spends more money finding oil than it would have had to spend buying the equivalent amount in the market place there is little Incentive to continue exploration. Conversely, a company which manages to find new reserves at low cost has a significant competitive edge since it can afford more exploration, find and develop reservoirs more profitably, and can target and develop smaller prospects. [Pg.15]

With reference to obtained results the high-teeh manual ultrasonic inspection performed by ISONIC system becames competitable with radiography, providing highest sensitivity, low inspection cost, obvious and objective documentation. [Pg.773]

Chemical reactions can be studied at the single-molecule level by measuring the fluorescence lifetime of an excited state that can undergo reaction in competition with fluorescence. Reactions involving electron transfer (section C3.2) are among the most accessible via such teclmiques, and are particularly attractive candidates for study as a means of testing relationships between charge-transfer optical spectra and electron-transfer rates. If the physical parameters that detennine the reaction probability, such as overlap between the donor and acceptor orbitals. [Pg.2497]

Very small synthetic diamonds have been made industrially by subjecting graphite to pressures in the range 5.5-b.9 GN m , at temperatures between 1500 and 2700 K. The diamonds produced are very small but competitive with natural diamonds for use in industrial cutting and grinding wheels. [Pg.164]

In addition to the catalytic allylation of carbon nucleophiles, several other catalytic transformations of allylic compounds are known as illustrated. Sometimes these reactions are competitive with each other, and the chemo-selectivity depends on reactants and reaction conditions. [Pg.291]

Another preparative method for the enone 554 is the reaction of the enol acetate 553 with allyl methyl carbonate using a bimetallic catalyst of Pd and Tin methoxide[354,358]. The enone formation is competitive with the allylation reaction (see Section 2.4.1). MeCN as a solvent and a low Pd to ligand ratio favor enone formation. Two regioisomeric steroidal dienones, 558 and 559, are prepared regioselectively from the respective dienol acetates 556 and 557 formed from the steroidal a, /3-unsaturated ketone 555. Enone formation from both silyl enol ethers and enol acetates proceeds via 7r-allylpalladium enolates as common intermediates. [Pg.364]

Sulfuric acid is normally used instead of hydrochloric acid in the diazotization step so as to minimize the competition with water for capture of the cationic intermediate Hydrogen sulfate anion (HS04 ) is less nucleophilic than chloride... [Pg.947]

A newly proposed method is to be tested for its singleoperator characteristics. To be competitive with the standard method, the new method must have a relative standard deviation of less than 10%, with a bias of less than 10%. To test the method, an analyst performs ten replicate analyses on a standard sample known to contain 1.30 ppm of the analyte. The results for the ten trials are... [Pg.703]

Filling up the 4/ orbital is a feature of the lanthanides. The 4/ and 5d orbitals are of similar energy so that occasionally, as in La, Ce and Gd, one electron goes into 5d rather than 4f. Similarly, in the actinides, Ac to No, the 5/ subshell is filled in competition with 6d. [Pg.201]

Cost. It is necessary to produce the feedstock from which the monomer is generated, viz, the dimer, at a cost which can be supported by the commercial appHcation, and yet allow it to be economically competitive with all other alternative ways to achieve the same end result. This factor often, but not always, seriously limits the amount of effort that can be put iato dimer synthesis and purification. [Pg.429]

Cost estimates of producing ethanol from com have many uncertainties (11). Most estimates fall into the range of 0.26 to 0.40 per Hter ( 1 to 1.50/gal), after taking credits for protein by-products, although some estimates are lower. These estimates do not make ethanol competitive with oil until... [Pg.423]

The price differential at which coal becomes competitive with gas depends on plant size and the cost of capital, but based on estimates by the International Energy Agency (21) the required price ratio for gas to coal in North America falls into the range of 3.1 to 3.7 on an equivalent energy basis ( /MJ). Current prices give a gas/coal cost ratio nearer 1.5 to 2.0. As a result, all projected new methanol capacity is based on natural gas or heavy oil except for the proposed coal-based plant in China. [Pg.165]

Because oil and gas ate not renewable resources, at some point in time alternative feedstocks will become attractive however, this point appears to be fat in the future. Of the alternatives, only biomass is a renewable resource (see Fuels frombiomass). The only chemical produced from biomass in commercial quantities at the present time is ethanol by fermentation. The cost of ethanol from biomass is not yet competitive with synthetically produced ethanol from ethylene. Ethanol (qv) can be converted into a number of petrochemical derivatives and could become a significant source. [Pg.176]

Viable glass fibers for optical communication are made from glass of an extremely high purity as well as a precise refractive index stmcture. The first fibers produced for this purpose in the 1960s attempted to improve on the quahty of traditional optical glasses, which at that time exhibited losses on the order of 1000 dB/km. To achieve optical transmission over sufficient distance to be competitive with existing systems, the optical losses had to be reduced to below 20 dB/km. It was realized that impurities such as transition-metal ion contamination in this glass must be reduced to unprecedented levels (see Fig. [Pg.252]

Heat and oil resistance coupled with its low swell have led automotive apphcations into laminated tubing and hoses (11) with this material. This resistance to the effects of ASTM No. 3 oil at service temperatures of 200°C makes it competitive with fluorocarbons and with the tetrafluoroethylene—propylene copolymer. Fluorosihcones are used to make exhaust gas recirculation (EGR) diaphragms for some passenger cars. [Pg.401]

Economic coaditioas ia the United States have not favored the production of EPC and EPI having desirable functional and nutritional characteristics at prices competitive with those of conventional protein sources. [Pg.471]

In general, nonconventional protein foods must be competitive with conventional plant and animal protein sources on the bases of cost delivered to the consumer, nutritional value to humans or animals, functional value in foods, sensory quality, and social and cultural acceptability. Also, requirements of regulatory agencies in different countries for freedom from toxins or toxic residues in single-cell protein products, toxic glycosides in leaf protein products, pathogenic microorganisms, heavy metals and toxins in fish protein concentrates, or inhibitory or toxic peptide components in synthetic peptides must be met before new nonconventional food or feed protein products can be marketed. [Pg.472]

There is an inherent economic penalty associated with producing Hquids from either natural gas or soHd coal feedstock. Synthetic Hquid fuels technologies are generally not economically competitive with cmde oil processing in the absence of extraneous influences such as price supports or regulations. [Pg.78]

Direct conversion of natural gas to Hquids has been actively researched. Process economics are highly variable and it is unclear whether direct natural gas conversion technologies are competitive with the estabUshed indirect processes. Some emerging technologies in this area are presented herein. [Pg.86]


See other pages where Competition with is mentioned: [Pg.147]    [Pg.117]    [Pg.1235]    [Pg.2110]    [Pg.394]    [Pg.394]    [Pg.157]    [Pg.249]    [Pg.185]    [Pg.198]    [Pg.363]    [Pg.388]    [Pg.139]    [Pg.7]    [Pg.80]    [Pg.244]    [Pg.69]    [Pg.431]    [Pg.434]    [Pg.165]    [Pg.486]    [Pg.27]    [Pg.37]    [Pg.37]    [Pg.42]    [Pg.43]    [Pg.47]    [Pg.96]    [Pg.176]   
See also in sourсe #XX -- [ Pg.98 ]




SEARCH



Alkylation competition with hydride transfer

Alternative fuels competition with gasoline

Arsenic competition with other anions

Bridge methods in non-competitive enzyme immunoassays with antigens immobilized on the solid phase

Calcium competition with

Competition with Duplexes

Competition with Other Anions

Competition with Solvent

Competition with fluorescence

Competition with folding

Competition with incentive programs

Competitive RIA of Apidra (Insulinanalogue) with Double Antibody Precipitation

Competitive RIA of Free Anti-Insulin Antibodies with PEG Precipitation (Semi-Quantitative Assay)

Competitive with FPP

Competitive with Ras peptid

Deuterium isotope effects competition studied with

Dimerization competition with electron transfer

Electron transfer reactions competition with coalescence

Elimination competition with

Elimination competition with substitution

Elimination reactions competition with nucleophilic

Elimination reactions competition with substitution

Elution of a Narrow Band with Competitive Langmuir Isotherms

Elution of a Wide Band With Competitive Langmuir Isotherms

Fluorescent reporter, competition with

Free radical reactions, competition with

Hydrophobic groups competition with

Magnesium competition with calcium

Menten with Competitive Inhibitor

Metal enolates competition with C-alkylation

Metal—ligand bonds competition with protons

Monoclonal antibodies with competitive immunoassays

Natural product inhibitors competitive with

Non-competitive assays with antibodies immobilized on the solid phase

Non-competitive assays with complement immobilized on the solid phase

Nucleation competition with crystal growth

Nucleophilic substitution reactions competition with elimination

Phosphates competition with vanadates

Propagation in Competition with Condensation

Proton removal nucleophilic substitution, competition with

Substitution, competition with

© 2024 chempedia.info