Draining premature

Locate conduit to avoid moisture. Provide breathers and drains if necessary. The use of conduit seals within 18 inches of the detector is required to prevent the passage of moisture through the conduit and into the detector enclosure. If moisture is allowed to accumulate in the detector housing, premature detector failure can occur. 

Specifically note that Type 7 (explosion-proof) enclosures and their associated conduit systems are neither gas or liquid tight. Consequently, corrosive gases such as hydrogen sulfide and water from rain or internal condensation can accumulate with the enclosure. Premature failure of electrical devices and interconnections often results when preventive measures such as drains, air purges, and dual rated enclosures are not used to remove or exclude these corrosive elements. Type 7 enclosures are intended for indoor use. 

Fig. 26 Dry thickness of poly(acryl amide) as a function of the position on the silica substrate prepared by slow ( ) and fast ( ) removal of the polymerization solution by utilizing the method depicted in Fig. 24. The inset shows the dry poly(acryl amide) thickness as a function of the polymerization time. Note that both data sets collapse on a single curve at short polymerization times. Regardless of the drain speed, the brush thickness increases linearly at short polymerization times and levels off at longer polymerization times. The latter behavior is associated with premature termination of the growing polymers...

Use two sheets of heavy-gauge construction-grade tin-foil to which 2B-gauge lead wires have been glued. Place a heavily perforated plastic liner, such as a sink drain tray, between the two sheets. The trick here is to adjust the frequency and size of the holes in the plastic Interlayer so that one does not have a premature circuit, yet the circuit will complete after not too much pressure has been applied. Again, it is imperative that one test any device thoroughly and that an arming switch be used at setup. 

Leaves yellow plant dies early. Cause Dry rot. Other symptoms of this fungal disease include dry, brown or black, corky spots on corms and husk coverings. You may see black fungal growth spots on decayed leaf bases. Plants may turn yellow and die prematurely. Choose corms carefully to avoid infected specimens. Destroy infected plants. Do not replant in same area. Replant only in well-drained soil. 

Leaves with water-soaked spots rhizomes rotted and soft. Cause Bacterial soft rot. Soft rot attacks during wet seasons in poorly drained soil, entering through wounds in the rhizome made by premature leaf removal or cultivation or carried on the bodies of iris borers. Crowded plants in shady locations are more susceptible to this disease. Infected rhizomes are dry on the outside, but wet, smelly, and slimy inside. This rot may start in the leaves... 

Reduction of diesel exhaust emissions has, in some cases, led to engines producing more soot within the lubricant, exacerbated by extended oil drain intervals leading to more soot-related wear. Some low-emission engines have also experienced increased fuel dilution, causing premature ageing of the lubricant. These issues have presented the lubricant formulator with an array of problems that must be addressed. 

The ability to lock in strain is very important for applications wherein the device must hold its actuated state for an extended period of time. Conventional dielectric materials consume energy when actuated due to current leakage through the film, and can succumb to premature breakdown when held at high strain for an extended period of time. By locking in the actuated shape, BSEPs can hold their actuated shape without draining power and can maintain that shape indefinitely without failure. This combination of properties places BSEP materials at the forefront in terms of electroactive polymer materials for artificial muscle applications. 

If a pacemaker is close to its elective replacement point, programming from a low- to a high-output setting immediately increases current drain on the battery, causing the terminal voltage of the battery to fall. This is an effect of Ohm s law and is the result of high battery impedance in a partially depleted cell. This has been shown to cause premature activation of the ERI (11). 

FIGURE 5.5 A guide to the application of consolidant to an object If the application is carried out under vacuum, the container should be evacuated before the addition of the liquid consolidating material. A cova- should be placed over the container to prevent premature evaporation or reaction with atmospheric moisture. The object is lifted off the bottom of the container to reduce the pos-sibiUty of air pockets (a). A small amount of polymer in Uquid form is added to start the penetration process. This Uquid is drawn up into the porous material by capillary absorption (b). The object is soaked in consoUdant aUowing time for trapped air to dissolve and the diffusion of the various components in the Uquid to approach equdibrium. Any vacuum that has been applied is broken slowly and carefully to prevent sudden stresses being appUed to the object (c). Excess consolidant is allowed to drain out before the drying ot setting takes place. This reduces excess consoUdant and reduces the fomation of a surface skin with solvent-appUed polymers. 

Tests, inspections, and analyses conducted after the event led to the conclusion that the east SDV was substantially full of water at the time of the event, leaving insufficient room for the discharge water. Accordingly, upon scram actuation, the CRDs rapidly drove the control rods partially into the core but rod motion prematurely ceased when pressure quickly equalized on each side of the pistons. Following each scram actuation, the scram signal was reset by the operator, allowing more water to drain from the SDV and permitting the rods to insert... 

For the mainly oil-soluble Span 20 siufactant, however, the lifetimes are much less and films rupture prematurely, in line with predictions based on Bancroft s rule. At concentrations well above the CMC where the effective volume fraction of micelles is significant (>5 vol%), thin liquid films may drain in a stepwise fashion by stratification. This phenomenon, seen initially with foam films, was explained by the formation of periodic colloidal structures inside the film that results in layering of the micelles. At a step-transition, a layer of micelles leaves the film and the film thickness decreases by approximately the effective micellar diameter. It can also occur in emulsion films shown recently for hexadecane-aqueous sodium case-inate-hexadecane systems. The step-height seen of around 20 nm is very close to the measured diameter of the casein micelles of between 20 and 25 nm. The layering ultimately increases the lifetime of a film, but a critical film area exists below which step transitions are inhibited such thick films containing layers of micelles are even more stable. 

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