Property decrease

Already in 1943 M. Schuler [2] described the comparison of the surface-active properties of sodium palmitate with several ether carboxylates based on a constant amount of C atoms. The results showed that with more O bridges the optimal surface activity and emulsifying properties can be achieved at lower temperature, with the detergent properties decreasing and solubility increasing. 

Using a within-subject, placebo-controlled design, Haney et al. (2003) recently reported that nefazodone, an antidepressant that also has some sedative properties, decreased reports of anxiety and muscle pain during closely mon-... 

On the other hand, their mechanical properties decrease as the temperature rises because of their thermoplasticity. 

The behaviour with pure or salt water at ambient temperature is generally good, without significant deterioration of the mechanical properties over several years. However, when the temperature rises the properties decrease, particularly above 60° C. 

Oxcarbazepine is chemically and pharmacologically closely related to carbamazepine, but it has much less capacity to induce drug-metabolizing enzymes. This property decreases the problems associated with drug interactions when oxcarbazepine is used in combination with other drugs. The clinical uses and adverse effect profile of oxcarbazepine appear to be similar to those of carbamazepine. 

Both properties decreased markedly, on the other hand, as the wave traversed the field in the negative-to-positive direction. Application of an axial magnetic field of 22000 gauss had similar but weaker effects. If the gas mixture had been pre-dried, such electrical influences became weaker i.e., the "spin was stabilized . It was inferred that positive ions are involved in the combustion reaction chains. The polar surface of the glass surface may reduce the energy required for ion formation. Eyring et al noted in this connection that unsolvated positive ions always react with low activation energies (Ref 15, pp 130-31)... 

Other drug effects that decrease DA activity also support this position. Thus, when DA synthesis is blocked by a-methyl- p-tyrosine (AMPT), the dose necessary for an antipsychotic effect is reduced (i.e., the dose-response curve is shifted to the left by the interaction between dopamine and AMPT). A drug such as reserpine that can deplete DA stores also has relatively mild antipsychotic properties. Also, aripiprazole, which has D 2 presynaptic agonist properties, decreases the production of DA, as well as blocking D2 postsynaptic receptors. 

Maji et al. [136] have examined the effect of 30B loading on the mechanical properties of hyperbranched polyurethane (PU) nanocomposites. The extent of clay loading was varied from 2 to 16 phr. The nanocomposite containing 8 wt% 30B clay shows a 100% increase in the tensile strength as compared to unmodi-fied-clay-filled samples. Above 8 wt% clay loading, the mechanical properties decrease. The efficiency and good dispersion of 30B in the hyperbranched PU40... 

Polyacetylene-modified sulfur is evaluated as a curative in a 50 50 blend of S-SBR/EPDM. In pure S-SBR, the mechanical properties decrease with the polyacetylene coating due to a reduced release rate of the sulfur out of its shell. The cure and mechanical properties of the S-SBR/EPDM blend are nearly doubled because of improved compatibility. 

Thiamphenicol is a synthetic chloramphenicol analogue with a molecular structure that appears to preserve tlie antibacterial properties, decrease markedly the metabolism by the liver, enhance kidney excretion, and eliminate tlie occurrence of aplastic anemia, although it is probably more liable to cause dose-dependent reversible depression of the bone marrow (15). These properties make it preferable in certain cases to chloramphenicol (36, 37). 

In the series NaOH, Mg(OH)2, Al(OH)3, Si(OH)4, PO(OH)3. . ., the basic properties decrease. The OH ion, attached to the Na+ ion in NaOH, is such a strong base that it reacts with the protons of any acid, i.e. any compound that can give off protons. In PO(OH)3 the basicity of the OH ions, under the influence of the P5+, is so far decreased that it will not attract protons from acids of normal acid strength. If, however, unusually strong acids were available, there would be the possibility that PO(OH)3 would still withdraw a proton from this acid and form an ion P(OH) J. 

The structure and mechanical properties of ASA and blends of ASA and poly(butylene terephthalate) (PBT) have been studied. 40/60 and 60/40 blends of ASA/PBT are composed of two phases, thus are dispersed, while a 50/50 blend shows a cocontinuous structure. With increasing processing temperature, the mechanical properties decrease, probably due to the degradation of PBT in the course of processing. The mechanical properties do not as much decrease for blends with a continuous structure (24). 

The influence of steric effects on the thermodynamic parameters of extraction has been discussed in numerous publications (see the review in Ref. 12 and references therein). For a small series of selected extractants, a decrease of log Kex as a function of the length of alkyl substituents has been discovered.6970 However, in other cases, this dependence passes through a maximum or is not regular at all.71 The point is that the increase in the volume and branching of the substituents leads to some changes of molecular properties decrease of solubility in the aqueous phase, increase of steric hindrance upon the complexation, decrease of the extractant s aggregation, etc.12 Some of these factors strengthen extraction, but others weaken it. 

For an initially ductile polymer, the rate of decay of failure properties decreases abruptly after the embrittlement point. 

Metallic and nonmetallic properties are related to the number of valence electrons and the radius of an atom. Within a period, as the metallic properties decrease from left to right, the nonmetallic properties increase. Within a group as the metallic properties increase, the nonmetallic properties decrease from top to bottom. If the above trends are considered, francium, Fr, would be expected to have most metallic properties. However, since Fr is a radioactive element, not all of its properties have been determined yet. 

Plasticizers can be either reactive or nonreactive. The nonreactive plasticizers are from the phthalate and ester groups. Typical plasticizers are DIOP, TCP, and Benzoflex 9-88. The level of plasticizer must be controlled because the physical properties decrease as the levels increase. 

The addition of plasticizer disrupts the hydrogen bonding in the system and, hence, the physical properties decrease. To overcome this, at low harnesses, some long-chained material can also be added. A simple system is shown in Figure 5.3, where some additional plasticizer such as DIOP is added to a 95 Shore A polyether prepolymer, which has been cured with Ethacure 300. 

The revolutionary zeolite cracking catalyst (synthetic Linde X and Y) was introduced commercially over 28 years ago, but considerable effort is still being expended on the improvement of its stability and catalytic properties. Decreasing the aluminum content of the zeolite framework and the replacing the rare-earth with the hydrogen form have greatly increased activity at the expense of stability. The thermal stability of the faujasites is fairly well understood, while the reasons for the increased catalytic activitity are still not fully known. 

Exposure to 10 rads gives slight increase in mechanical properties. Above this level cellulose is degraded and mechanical properties decrease rapidly. Low exposure used to temporarily inhibit growth of fungi. 

The negative ER effect—occurs when the rheological properties decrease with applied electric field ... 

Local -deficiency (LOC D) is the largest positive charge on any one carbon atom in the ring and this property decreases in a different order 1,3,5-triazine > pyrimidine > 1,2,4,5-tetrazine > pyridazine pyridine > pyrazine. This order is in closer agreement with a -deficiency scale ( A) based on 13C NMR chemical shifts <19820MR192, CHEC-111(9.02.2)97 >. 

If carbanions are to be titanated, alkoxy or amino ligands at titanium are most likely to ensure success. Sulfur or phosphorus ligands have not been tested. In rare cases electrontransfer instead of titanation sets in, forming Ti(III) species which are generally unsuitable for useful chemistry. This is most likely to occur if the carbanion is very electron rich, e.g., in case of dianions or extended anionic K-systems. We have noticed that this undesired property decreases in going from chloro to alkoxy and finally to amino ligands at titanium. For example, dianions derived from carboxylic acids reduce chlorotitanium triisopropoxide 3 to some extent, whereas quantitative double titanation occurs with chloro- or bromotitanium tris(diethylamide) 15 77>. Addition of amines to the reaction mixture has similar effects 77). 

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