Blinding permit

Permit system—a regulated system that requires a variety of permits for various applications. The most common applications are cold work, hot work, confined space entry, opening/blinding, permit to enter, and lock-out/tag-out. 

Opening/blinding permit—removing blinds, installing blinds, or opening vessels, lines, and equipment... 

Permit to enter—designed to protect employees from oxygen deficient atmospheres, hazardous conditions, power-driven equipment, and toxic and flammable materials Unplugging permit—barricades area, clears lines for unplugging, informs personnel, issues opening/blinding permit, issues unplugging permit... 

The types of permits used in the chemical processing industry include cold work permits, hot work permits, opening/blinding permits, permits to enter, unplugging permits, energy isolation procedures, and lock-out, tag-out procedures. 

Hazards associated with using natural gas Hazards associated with leaks Instrument failures Confined Space Entry permit Opening blinding permits... 

Use of window and blinds permits dayligi into the centre room and a degree of cont... 

Removable-Medium Filters Some drum filters provide for the filter medium to be removed and reapplied as the drum rotates. This feature permits the complete discharge of thin or sticky cake and provides the regenerative washing of the medium to reduce blinding. Higher filtration rates are possible because of the thinner cake and clean medium, but this is compromised by a less pure filtrate than normally produced by a nonremovable medium. 

Unit checkout Check that required mechanical work has been completed, tags and blinds pulled, and temporary piping disconnected. Plant supervision must certify completion of work. Cancel all entry and work permits. Utility system has been commissioned. Check blind list and inspect lines close bleed, drain and sample valves. 

Staff become bored performing repetitive tasks, whereas a reliable laboratory robot will perform procedures uniformly, eliminating human error. Automation permits the frequent use of replicates, standards and controls to verify precision, so the analyst and customer can have complete confidence in the results. Taylor et al. [14] have suggested that the number of blind duplicates sent to control laboratories by operating staff can be as high as 70% of total work load. Reliability and traceability are important benefits of... 

The four drugs were administered by psychiatrists blinded to treatment group assignment of patients. The 14-week study consisted of an 8-week dose escalation and fixed dose and a 6-week variable-dose period. The mean dose levels (mg/day) of the four compounds after the first 8 weeks were 452 for clozapine. 20.2 for olanzapine. 8.3 for risperidone and 19.6 for haloperidol. Patients on haloperidol received prophylactic anticholinergic medication to prevent extrapyramidal symptoms, and a few other drugs were permitted to treat agitation and insomnia. 

There have been five double-blind studies comparing the antidepressant efficacy of different SSRIs versus different TCAs in patients with HDRS scores of 25 or more (122, 123,124, 125 and 126). Three of these studies permitted inclusion of both inpatients and outpatients ( 122, 123 and 124), whereas the other two were solely done in outpatients (125, 126). Three were placebo-controlled (1.23, 125,126). In these three studies, the SSRI (i.e., fluvoxamine, paroxetine, or sertraline) was either superior to both the f CA and placebo or was comparable with the TCA and superior to placebo. In the other two studies, the SSRI was not different from the TCA and there was no placebo control. There have also been four studies and one metaanalysis of European clinical trials which found no difference in antidepressant efficacy between several different SSRIs and several different tertiary amine TCAs in patients hospitalized for major depression ( 127,128, 129,130 and 131). Finally, there have been two relatively small studies showing that fluoxetine and fluvoxamine both had antidepressant efficacy superior to placebo in patients with melancholia ( 132, 133). Another larger study failed to find a difference between paroxetine and amitriptyline in treating such patients ( 134). 

Hypersensitivity to ethambutol is rare. The most common serious adverse event is retrobulbar neuritis, resulting in loss of visual acuity and red-green color blindness. This dose-related adverse effect is more likely to occur at dosages of 25 mg/kg/d continued for several months. At 15 mg/kg/d or less, visual disturbances are very rare. Periodic visual acuity testing is desirable if the 25 mg/kg/d dosage is used. Ethambutol is relatively contraindicated in children too young to permit assessment of visual acuity and red-green color discrimination. 

In the latter half of 1972 the USAF, with industry, instituted studies of possible ways of further enhancing the smart bomb concept by the provision of blind attack facilities and extending the effective range to permit stand-off operations. Because smart bombs, EO or laser directed, are capable of only modified ballistic... 

Angiogenesis driven by myocardial hypoxia may permit collateral formation, relief of angina, and minimize tissue damage during myocardial infarction. On the other hand, hypoxic drive to retinal neovascularization can contribute to retinal hemorrhage and blindness. 

Squeeze bottles, oil cans, and pressurized glue guns permit precise and speedy adhesive application. By adjusting the pressure, the rate of adhesive flow can be matched to the production rate. These devices can apply the adhesive or sealant inside a blind hole or limited-access area. The tip of the applicator can be used to deliver multiple spots of adhesive. 

Note At this point, the spectrophotometric detector is probably saturated or blinded. If you have a refractometer you may continue with the remaining steps if time and the lab instructor permit. 

This differs from Eq. (6.44) by a constant. But in hindsight we recognize that the derivation of Eq. (6.44), following from Eq. (6.33), was blind to changes in the numbers of molecules, and thus permitted a spatially uniform constant to settle the question of net changes in molecule numbers. 

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