Activity similarity

Various sulfonium and carbosulfonium ions show remarkably enhanced reactivity upon superelectrophilic activation, similar to their oxygen analogs so do selenonium and telluronium ions. The alkylating ability of their trialkyl salts, for example, is greatly increased by protosolvation. 

Rifapentine (DL473) [61379-65-5] (40), C42H34N4O22, a pipera2inyl hydra2one of 3-formyl rifamycin SV, is similar to rifampicin. Rifapentine has activity similar to rifampicin, but its half-life is much longer (149,150). 

In 1974, a petition for affiimation of the GRAS status of miracle fmit was submitted by the Miralin Company, mainly based on the fact that miracle fmits have been consumed by humans since before 1958. In 1977, the petition was denied by the FDA. However, miraculin remains a research curiosity. Its stmcture was elucidated in 1989 (125). Another protein, curculin [151404-13-6] (126), has also been reported to exert a sweet-inducing activity similar to miraculin. 

R " = CH3) which has activity similar to that of clavulanic acid and inhibits many of the type I Cephases. The synthesis (156), microbiological activity (152,156—162), and stabiUty (152) of ta2obactam have been reported. 

Rhodacarborane catalysts have been immobilized by attachment to polystyrene beads with appreciable retention of catalytic activity (227). A 13-vertex /oj iJ-hydridorhodacarborane has also been synthesized and demonstrated to possess catalytic activity similar to that of the icosahedral species (228). Ak-oxidation of closo- >(2- P((Z [) 2 - i- > l[l-Bih(Z, results in a brilliant purple dimer. This compound contains two formal Rh " centers linked by a sigma bond and a pak of Rh—H—B bridge bonds. A number of similar dimer complexes have been characterized and the mechanism of dimer formation in these rhodacarborane clusters have been studied in detail (229). 

Within a series with a fixed hydrophilic head group, detergency increases with increasing carbon chain length, reaches a maximum, and then decreases. This behavior frequentiy reflects a balance between increased surface activity of the monomer and decreased monomer concentration with increased surface activity. Similar effects are seen in surfactants in biological systems. 

Is the proposed ABC Co. activity similar m nature to the facility s core activities ... 

Optimum comfort would be in the center of each zone. Moving away from the center, some people would be expected to have thermal sensations approaching - 0.5 and -i-0.5 at the cooler and warmer ET borders. The zones of Fig. 5.7b are for sedentary or slightly active ( M 1.2 met) people. If the activity level is higher than that, then the ET" line borders can be shifted about 1.4 K lower per met of increased activity. Similarly, if the clothing is different than the 0.9 and 0.5 do vales of Fig. 5.7a, the temperature boundaries can be decreased about 0.6 K for each 0.1 do increase in clothing insulation. Another, similar way to adjust the comfort zone for both different activity levels and do values is to shift the zone centered on the optimum temperature at... 

The Raman spectrum of aqueous mer-cury(I) nitrate has, in addition to lines characteristic of the N03 ion, a strong absorption at 171.7 cm which is not found in the spectra of other metal nitrates and is not active in the infrared it is therefore diagnostic of the Hg-Hg stretching vibration since homonuclear diatomic vibrations are Raman active not infrared active. Similar data have subsequently been produced for a number of other compounds in the solid state and in solution. 

Some hydroxamic acids of the isoxazole series also display a marked antituberculosis activity. The penicillin derivatives, acylated with isoxazole carboxylic acids possess an antibacterial activity similar to that of penicillin, against resistant species.Among other isoxazole derivatives possessing activity one should especially mention the sulfonamides of this series, and 4-hydroxyiminoisoxazol-5-... 

Curdlan possesses anti-tumour activity similar to that shown by fungal (1-D-glucans, a property which appears to be related to the ability to form triple helices. 

Deoxy-5-epi-5-fluorosisomicin (695) was prepared by mutasynthesis using 2,5-dideoxy-5-epi-5-fluorostreptamine (693). Compound 695 and 5-deoxy-5-fluorosisomicin (696) were respectively synthesized from protected derivatives 697 and its 5-epimer by treatment with DAST. These compounds (695 and 696) showed antibacterial activity similar to that of sisomi-... 

These observations are, indeed, consistent with an associative activation, generation of a seven-coordinated intermediate (easier in the case of Mo and W than for Cr because their larger sizes produce less steric hindrance) by attack taking place directly upon the metal atom, that is, with an A or a limiting 5 2 mechanism, accompanied by a reaction sequence involving dissociative activation similar to scheme (24) above, viz. 

This surface had an Auger spectrum similar to that of the surface produced during the reaction and exhibited a catalytic activity similar to that of the clean surface. This suggests that during the reaction the amount of nitrogen deposited on the surface is close to that present in the compound PeN and possibly that this is actually present at the surface during the reaction (6). 

MacDonnell et al. (15) first suggested competitive displacement for the stimulation of PE activity. An increase in activity was ascribed to competitive displacement of PE from an inactive complex followed by a decline in activity at higher concentrations due to competition for carboxylic acid binding sites between PE and cations. Competitive displacement of PE from pectic acid by cations was conclusively shown with Lineweaver-Burke plots (7). The effect was moderated by pH (7, 15). We have shown that other polyamines, including putrescine, a diamine, and spermine, a tetramine, "activate PE activity similarly to inorganic cations (13). 

On this medium, the protein extracts of the SCPP strain exhibited PG activity similar to the one obtained on 1% Pg medium (data not shown). Hence, it seems that at this concentration (1%) glucose does not inhibit the PG activity of the SCPP strain. 

There are other substrates for the E. coli Met(0)-peptide reductase, one of which is Met(0)-a-l-PI. The native protein is the major serum elastase inhibitor that functions by forming a binary complex with elastase which inhibits its activity. Met(0)-a-l-PI, on the other hand, which can be formed by treatment of the protein with JV-chlorosuccinimide, cannot form a complex with elastase and therefore is not able to inhibit elastase activity . Table 6 shows, however, that when Met(0)-a-l-PI is incubated in the presence of Met(0)-peptide reductase and dithiothreitol the protein regains its ability to form a complex with elastase and inhibit elastase activity . Similar to results found with Met(0)-L12 reduced thioredoxin could replace the dithiothreitol as reductant in the enzymatic reaction. 

It can be seen that though the aldehydic function is important for antiinflammatory activity as observed in compoimd 36, its conversion to the unsaturated cyanoesters 37 shows an increase in the activity. Similarly, the ethers 39 with the ortho aldehydic group upon conversion to benzofurans 6 show a sHght increase in activity. None of the compounds tested showed any analgesic activity. 

As an alternative approach towards the above requirement, Somorjai introduced the method of electron lithography [119] which represents an advanced HIGHTECH sample preparation technique. The method ensures uniform particle size and spacing e.g. Pt particles of 25 nm size could be placed with 50 nm separation. This array showed a uniform activity similar to those measured on single crystal in ethylene hydrogenation. The only difficulty with the method is that the particle size is so far not small enough. Comprehensive reviews have been lined up for the effect of dispersion and its role in heterogeneous catalysis [23,124,125]. 

Burger M, Burger JA, Hoch RC, Oades Z, Takamori H, Schraufstatter IU. Point mutation causing constitutive signaling of CXCR2 leads to transforming activity similar to Kaposi s sarcoma herpesvirus-G protein-coupled receptor. 1 Immunol 1999 163(4) 2017-2022. 

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