Index plate

Transformants showing fluorescence yields either lower or greater than the control were identified, isolated from the index plates and tested for photoautotrophic growth in HS media (agar plates as well as liquid media) under low illumination conditions. 

Figure 1 shows a fluorescence video image of an index plate containing 24 Chlamydomonas reinhardtii DNA insertional transformants. All colonies, except one, displayed Chi fluorescence yields similar to that of the control (greenish color). The exception was a colony in position g-3 , which showed a substantially lower yield of Chi fluorescence (blue-violet color). From 6,500 transformants that were screened with this fluorescence video imaging technology, 129 transformant colonies displayed Chi fluorescence yield properties similar to that of the colony in position g-3 . The lower yield of Chi fluorescence from such colonies may be a consequence of a truncated Chi antenna size for the photosystems in these transformants. These colonies were selected for further study. 

A special sampling technique often applied for infrared studies of biological systems is attenuated total reflection spectroscopy or ATR spectroscopy. With this technique, the infrared beam is guided through a transparent medium of high refractive index (plate, often crystalline material) in such a way that several total reflections take place at the surfaces. Ideally, if the surfaces are clean, the infrared beam is not attenuated. However, if an infrared absorber is deposited onto the surface, the infrared... 

An index plate containing a number of circles of different-spaced holes is attached to the front of the head. The spring-loaded pin attached to the crank locates in the required hole circle. The head spindle has a central hole... 

Since the gear ratio is 40 1, 40 turns of the crank will turn the spindle (and the workpiece attached to it) through one complete revolution. Alternatively, one turn of the crank will cause the spindle to rotate 1/40 of a revolution or 9°. The purpose of the index plate is to further subdivide one revolution of the crank. The index plate contains a number of circles of holes, each containing a different number. The crank can be adjusted for radius so that the spring-loaded pin will fit in any circle of holes. Two sector arms on the index plate can be adjusted to reveal the number of holes required (Fig. 11.16). The number of subdivisions which can be achieved depends on the number of holes in each index plate supplied by the manufacturer. 

For example, a manufacturer may supply three index plates containing circles with the following number of holes ... 

A workpiece is required to have (a) 14 divisions and (b) a n umber of slots 23° apart. Calculate the dividing head settings if the supplied index plate has 21.23.27.29.31 and 33 holes. Answer, (a) 2 turns and 18 holes in a 21-hole circle and (b) 2 turns and 15 holes in a 27-hole circle.)... 

For the injection moulding of the plastic parts, hot runners allow a waste free production. The plastic is injection moulded as in a conventional process. When sufficient solidification is reached, the mould opens, and an index plate (this is a rotating platen which takes the plastic parts from the first cavity and puts them into the liquid rubber cavity by rotating them through 180 degrees), robot, etc., extracts the plastic moulding and transfers it into the silicone cavity. 

A description of mold functions. In addition to the usual components such as slider, hot runner needles, etc., special movements (like those of the index plate) of special molds should also be explained. 

The molding cycle could be considered as consecutive injection processes, so it is necessary to use as many injection units as materials to be injected Once the first material has been molded, it is necessary to have available space in the cavity for the next polymer this is done by different techniques such as Rotatory Table, Indexing plate, Stackmold, Slide-cam technique and Transfer Molding However, the process conditions involved are the same as in a convention injection process. 

---