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Reporting effect

Another type of NR crosstalk, which has only recently been recognized, is the so-called nongenomic actions of several receptors that induce very rapid cellular effects. Effectively, evidence has accumulated over several decades that steroid receptors may have a role that does not require their transcriptional activation, such as modifying the activity of enzymes and ion channels. While the effects of steroids that are mediated by the modulation of gene expression do occur with a time lag of hours, steroids can induce an increase in several second messengers such as inositol triphosphate, cAMP, Ca2+, and the activation of MARK and PI3 kinase within seconds or minutes. Many mechanistic details of these nongenomic phenomena remain poorly understood. Notably, controversy still exists as to the identity of the receptors that initiate the non-genomic steroid actions. However, it now appears that at least some of the reported effects can be attributed to the same steroid receptors that are known as NRs. [Pg.898]

The reported effect of konjac GaM on the glass transition of high-sugar/polysaccharide mixtures [242] can be utilized in sugar, hard-boiled and frozen confectionery products and might replace gelatin, which is refused by some consumers due to diet and health problems. [Pg.32]

Developmental toxicity is shown by the disubstituted methyl-, butyl-, and octyltins, but not by the corresponding monosubstituted compounds. The major reported effect is teratogenicity, with effects on fetuses shown at doses close to maternally toxic ones in most cases. NOAELs for dimethyltin, dibutyltin, and dioctyltin are 10 (10), 2.5 (1.0), and 45 (30) mg/kg body weight per day for teratogenicity (maternal toxicity NOAELs in parentheses). [Pg.5]

This chapter reviews the reported effects of different types of energy on chemical processing. Many of them are already known for a long time, but were, until recently, mostly used in nonreactive systems such as separation or drying. The focus here is on the (assumed) mechanism, reported effects, and known industrial applications of reactive chemical systems. [Pg.289]

In pharmacology, two adamantane derivatives. Amantadine (1-adamanta-neamine hydrochloride) and Rimantadine (a-methyl-1-adamantane methyla-mine hydrochloride) (see Fig. 24), have been well known because of their antiviral activity [129]. The main application of these drugs is prophylaxis (treatment to prevent the onset of a particular disease) and treatment of influenza-A viral infections. They are also used in the treatment of parkinsonism and inhibition of hepatitis-C virus. Memantine (1-amino-3,5-dimethyladaman-tane) (see Fig. 24) has been reported effective in slowing the progression of Alzheimer s disease [130]. [Pg.235]

Studies of workers and volunteers in experiments have provided most of the data on health effects of inhaled trichloroethylene in humans. Most of the information on reported effects in humans following oral exposure... [Pg.178]

Lutein has some structural similarities to P-carotene, reported to enhance the development of lung cancer when given in supplement form to heavy smokers. The available data indicate that lutein in food would not be expected to have this effect. The committee was unable to assess whether lutein in the form of supplements would produce the reported effect in heavy smokers. [Pg.573]

A significant volume of literature relates to our work. Concerning choice of support, Montassier et al. have examined silica-supported catalysts with Pt, Co, Rh Ru and Ir catalysts.However, these systems are not stable to hydrothermal conditions. Carbon offers a stable support option. However, the prior art with respect to carbon-supported catalysts has generally focused on Ru and Pt as metals.Additionally, unsupported catalysts have also been reported effective including Raney metals (metal sponges).Although the bulk of the literature is based on mono-metallic systems, Maris et al. recently reported on bimetallic carbon-supported catalysts with Pt/Ru and Au/Ru. In contrast, our work focuses primarily on the development of a class of rhenium-based carbon supported catalysts that have demonstrated performance equal to or better than much of the prior art. A proposed reaction mechartism is shown in Figure 34.2 °l... [Pg.304]

Exposure Levels in Humans. This information is necessary for assessing the need to conduct health studies on these populations. No occupational studies were located regarding exposure levels of diisopropyl methylphosphonate in humans. Workers conducting wildlife toxicity studies at the RMA reported effects that could be associated with exposure to diisopropyl methylphosphonate however, the workers were also exposed to a number of other toxic chemicals. One study that attempted to determine... [Pg.128]

One study has reported effects on neurobehavioral function in lead-exposed workers at mean PbB levels of 50 pg/dL (Williamson and Teo 1986). Neurobehavioral function was measured using tests that are based on information processing theory in 59 lead workers and 59 controls matched for age, type of job, time on the job, education level, smoking history, and alcohol consumption. Statistically significant decreases in the lead-exposed workers were seen for critical flicker fusion reaction, simple reaction time, tracking speeds, hand steadiness tests, and sensory store memory. Sensory store memory speed showed a low but statistically significant correlation with PbB concentrations. Measurements of neurobehavioral function seemed well chosen, and repeated measures with associated appropriate statistics were used. [Pg.86]

In contrast to the animal studies for prenatal exposure, animal studies for postnatal exposure report effects at blood lead levels similar to those associated with effects in humans. [Pg.301]

Kiser, AK and Dagnelie, G, 2008. Reported effects of non-traditional treatments and complementary and alternative medicine by retinitis pigmentosa patients. Clin Exp Optom 91, 166-176. [Pg.345]

An important parameter that has to be considered during desulfurization as well as for subsequent biocatalyst separation and recycle is the impact of the oil phase on the biocatalyst activity and half-life. Additionally, the effect of the biocatalyst on forma-tion/breakage of the oil-water emulsions is also important. The latter will be discussed in Section 2.3.3. It becomes important for lower boiling feedstocks such as gasoline, which offers the most toxic solvent environment for the biodesulfurization catalyst. The effect of solvents on biocatalysts has been investigated in very few reports. A study by the Monot group reported effect of two solvents on several Rhodococcus strains [254], The strains contacted with the solvents and their desulfurization activity, growth, and... [Pg.126]

The effect of oil/water ratio has been studied extensively for various catalysts. Patel et al. [258] reported effect of oil/water ratio on rate of desulfurization by IGTS8. They used freeze-dried cells reconstituted with water to do the studies. They found that a minimum of 1.25 mL of water per gram of freeze-dried cells is necessary to enable biodesulfurization. At a W/O ratio of 1 9, about 82% of the maximum desulfurization activity was achieved. The rate of desulfurization was reported to be similar between the W/O ratio of 1 1 and 4 1, but decreased upon increasing oil content further. The effect of the ratio was also studied by Shan et al. using diesel oil as the oil phase and P. delafieldii R-8 as the biocatalyst [259], The water content was varied to obtain a W/O ratio between 0 1 and 20 1, using a fixed amount of biocatalyst and oil. The authors found that the desulfurization rate increased up to a W/O ratio of 2 1, after which it remained constant. [Pg.127]

SP Crop Application rates Reported effects Recovery... [Pg.159]

The influence of water on the rate of CO hydrogenation over y-Al203-supported cobalt catalysts has been the subject of several studies. Table 2 gives an overview of the reported effects. As can be seen the observed effects range from negative to positive, for a range of catalyst compositions and supports used. There are also examples of this effect in the patent literature, e.g. Eri et al,44 who addressed the effect of water on an a-Al203 supported cobalt catalysts. When the inlet water partial pressure was 4.6 bar, the CO conversion increased from 24 to 30%. Thus, a positive impact of water was recorded. [Pg.19]


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See also in sourсe #XX -- [ Pg.19 , Pg.43 , Pg.59 , Pg.60 , Pg.63 , Pg.149 ]




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