Complexes impairment

The dynamics of the penta-2,4-dienylzinc systems have also been studied in detail. Bis(2,4-pentadienyl)zinc TMEDA (31) (TMEDA complexation impairs thermal stability) exists as a 4 1 mixture of interconverting (E)- and (Z)-isomers in the a-aUylic form ( / ) which can be seen separately by 100 MHz H-NMR at 38°C in CeDe. The corresponding penta-2,4-dienylzinc chloride-TMEDA (32) exists solely as the ( )-structure both in solution and in the solid state. In the crystal structure of (E)-32 the -coordination... 

Partial seizures, complex Impaired consciousness that is preceded, accompanied, or followed by psychologic symptoms... 

Benzodiazepines. Several BZs have anticonvulsant activity and ate used for the treatment of epilepsy producing their anticonvulsant actions via interactions with the GABA /BZ receptor complex to enhance inhibitory GABAergic transmission (1). The anticonvulsant actions of the BZs tend to tolerate upon chronic usage in six months, and BZs also lead to withdrawal symptomatology. Other side effects include sedation, ataxia, and cognitive impairment. 

Chromium. The history of the investigations estabHshing the essentiaHty of chromium has been reviewed (136). An effect of brewer s yeast in preventing or curing impaired glucose tolerance in rats was revealed, and the active factor was identified as a Cr(III) organic complex, glucose tolerance... 

The first example of an indolo[2,3-a]carbazole derivative reported with a reasonably estabhshed structure was the mono N-methylated system 9, prepared via dehydrogenation with palladium on charcoal of the octahydro derivative 10, available via reaction of the aminocarbazole 11 with 2-hydroxycyclohexanone in the presence of a trace amount of anihnium bromide (Scheme 1). An approach toward the parent compound 1 using the same method has also been attempted, although without success (56JCS4783). The utility of this route is impaired by the complexity of the starting material, which requires multistep preparation, and the harsh conditions of the final step. 

FVffl circulates in blood complexed to vWF. In the absence of vWF, or in case of impaired binding to vWF, FVIII is degraded. 

Amprenavir (APV, Agenerase) is the most recently approved HIV protease inhibitor. It is smaller and stereochemically less complex than the other drugs in this class. Adsorption of this compound was found to be impaired by high fat meals. Common side effects of Amprenavir are nausea, vomiting, diarrhea, rash and a tingling sensation around the mouth. 

About 4.5 million Americans have heart failure (HF). It is the most frequent cause of hospitalization for individuals older than 65 years. Some patients, with treatment, may lead nearly normal lives, whereas more than 50% of individuals with severe HF die each year. HF is a complex clinical syndrome that can result from any number of cardiac or metabolic disorders such as ischemic heart disease, hypertension, or hyperthyroidism. Any condition that impairs the ability of the ventricle to pump blood can lead to HF In HF, die heart... 

This complex consists of four subunits, all of which are encoded on nuclear DNA, synthesized on cytosolic ribosomes, and transported into mitochondria. The succinate dehydrogenase (SDH) component of the complex oxidizes succinate to fumarate with transfer of electrons via its prosthetic group, FAD, to ubiquinone. It is unique in that it participates both in the respiratory chain and in the tricarboxylic acid (TC A) cycle. Defects of complex II are rare and only about 10 cases have been reported to date. Clinical syndromes include myopathy, but the major presenting features are often encephalopathy, with seizures and psychomotor retardation. Succinate oxidation is severely impaired (Figure 11). 

Although it is possible to identify a group of particularly toxic components in venom, it should be noted that the venoms are complex mixtures of components, many of which are synergistic. Muscle damage is particularly severe if myotoxic activity is combined with hemorrhagic activity. In this case, muscle regeneration is impaired, because the regenerating tissue is rendered anoxic at a time of intense metabolic activity. 

---