Winding thread

Emons A.M.C. 1994. Winding threads around plant cells a geometrical model for microfibril deposition. Plant Cell Environment 17 3-14. 

These are required to make threads, i.e. the final drawing, twisting and winding of cotton. Such motors must possess very smooth acceleration to eliminate breakage of threads. They are recommended to have a starting torque of 150-200% of T, and a pull-out torque of 200-275% of with a mean acceleration torque ol 150-175%. A normal acceleration time of 5-10 seconds is recommended. Faster acceleration may cause more breakages, while a slower acceleration may result in snarls and knots in the yarn as a result of insufficient tension. 

The windbaek seal elosely resembles the labyrinth but has an entirely different operational prineiple. A serew-thread deviee winds the oil, whieh is earried around the bore by the windage of the shaft, into an internal drain for return to the system as shown in Figure l3-23a. 

Windung, /. winding, etc. (see winden) con volution, turn spiral torsion (screw) thread. 

Since 1960, the inner core has been made from c/5-poly-butadiene by the compression moulding technique. This replaced the earlier material made from a suspension of barytes or bentonite clay in water and glycerine or the winding of rubber threads made from t /5-polyisoprene, either from latex or a dry rubber compound. A typical thread recipe is given Table 4. 

The requirements for a battery separator can best be understood in the context of how the separator is used. The conventional process (Fig. 1) for making spirally wound cells involves threading the separator (a) through a winding pin (b). 

Rubber in the form of fine threads produced by vulcanising a thin sheet of rubber compound, winding it on a drum and slitting it to the required size by revolving the drum against a number of sharp, wetted knives which revolve at high speed. Cyclised Rubber... 

The assembly for inhibition by thread-winding technique is shown in Figure 4.13 except that a propellant grain is used in place of a collapsible mandrel. 

The inhibition of composite propellants is somewhat easier than that of DB propellants. The binders used for composite propellants (with or without fillers) have been reported for inhibition of composite propellants. Such inhibition systems possess stronger bonds with composite propellants and prove to be more compatible coupled with better shelf-life of the inhibited propellants. However, epoxy or novolac epoxy resin with or without inert fillers is generally preferred for the inhibition of composite propellants due to a combination of properties possessed by them. The inhibition is usually done by casting technique and inhibition thickness is usually required on higher side in order to make the missions successful. In India, thread winding technique or inhibitor sleeve technique is preferred where 2.5-3.0mm inhibition thickness is sufficient as against 3.5-4.0 mm in case of inhibition by casting technique . 

The addition of ethanol precipitates the large molecules (DNA, RNA, and proteins) and leaves the small molecules in solution. DNA, being the largest fibrous molecule, forms thread-like precipitates that can be spooled off onto a rod. The protein and RNA form a gelatinous precipitate that cannot be picked up by winding them on a glass rod. Thus, the spooling separates DNA from RNA. 

Phyllotaxy.—Phyllotaxy is the study of leaf arrangement upon the stem or branch, and this may be either alternate, opposite, whorled, or verticillate, or fascicled. It is a general law in the arrangement of leaves and of all other plant appendages that they are spirally disposed, or on a line which winds around the axis like the thread of a screw. The spiral line is formed by the union of... 

Symptoms Found throughout North America, dodder grows as a tangle of orange or yellowish threads that winds around stems and other parts of host plants. The parasite draws nutrients from the host plants, weakening them. Dodder s rampant growth can rapidly smother plantings. 

To hold the filter medium in place and protect it from wear by the scraper it is wound with wire. Figure 16 shows at Z a threaded shaft which assists in wire winding. The threaded shaft is belted up to the drum shaft. Wiring starts from the side of the drum and after the wire from the reel has passed through a tension clip or brake and around a groove of the threaded shaft it is secured to the side of the drum. As the latter revolves the threaded slot keeps it properly spaced and the brake insures... 

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