Abstract: The present invention provides several methods for biological production of para-hydroxycinnamic acid (PHCA). The invention is also directed to the discovery of new fungi and bacteria that possess the ability to convert cinnamate to PHCA. The invention relates to developing of a new biocatalyst for conversion of glucose to PHCA by incorporation of the wild type PAL from the yeast Rhodotorula glutinis into E. coli underlining the ability of the wildtype PAL to convert tyrosine to PHCA. The invention is also directed to developing a new biocatalyst for conversion of glucose to PHCA by incorporation of the wildtype PAL from the yeast Rhodotorula glutinis plus the plant cytochrome P-450 and the cytochrome P-450 reductase into E. coli. In yet another embodiment, the present invention provides for the developing of a new biocatalyst through mutagenesis of the wild type yeast PAL which possesses enhanced tyrosine ammonia-lyase (TAL) activity.

Abstract: A computer typing learning device includes a cover and a seat, and a key board combined electrically with with a screen disposed between the cover 1 and the seat. An electronic circuit board is provided under a base plate of the key board for arranging various circuits thereon for various functions to display typed letters on a exercise letter row of the screen to be compared with a reference letter row and a warning mark row to show which typed letter is wrong. The keyboard is structured as all the same as that for common computers. A solar cell module is also provided inside the cover, connected with a battery deposited in a battery chamber in the cover, and a power convert switch is fixed on the cover for selecting a power source AC or DC for the device.

Abstract: Teaching apparatus is disclosed having a keyboard for selecting a character to be inscribed, an inscription panel for supporting writing material, and control apparatus for displaying the selected character under the inscription panel; each character is developed bit by bit along a writing stroke or strokes, and the rate of sequencing of the bits is regulated so as to be conveniently followed by the user in executing the inscription strokes. A supply roll of inscription material is provided at the right of the inscription panel so that a sequence of upright characters may be inscribed by drawing a previously inscribed character to the left and drawing a fresh area of writing material over the inscription panel.

Abstract: A golfer's stance for correctly addressing a golf ball using different clubs is taught by using a mat having a ball line on it with markings showing the different locations at which the ball should be put. The mat has on it either a single detachable strip or different sets of detachable or permanent strips. The or each strip indicates optimum stance lines with which the golfer's feet should be aligned when using a club of weight or number associated with the strip being used at any one time.

Abstract: A toy, as for instance a simulated toy computer, has a housing with a window formed in the housing. Behind the window is an indicia strip or carrier which has indicia located on its surface. Positioned in front of the indicia strip is a lenticular screen. The lenticular screen is connected to a mechanism which mechanically moves the lenticular screen with respect to the indicia. Movement of the lenticular screen in front of the indicia gives the appearance that the indicia, in fact, is moving. Actuator keys are provided on the housing for advancing the indicia strip and for activating the movement of the lenticular screen.

Abstract: A teaching toy has a housing with a viewing screen located in the housing. Positioned behind the viewing screen is an indicia carrier located on rollers. A plurality of indicia is located on the surface of the indicia carrier. By rolling the indicia carrier on the rollers, different portions of the indicia located on the indicia carrier are viewable through the viewing screen. Associated with the indicia carrier and located in front of it between it and the screen are a series of cover members which can temporarily cover a part of the indicia which is exposed through the screen. Operator actuators are connected to the cover members so as to allow the cover members to sequentially move from a position wherein they cover the indicia to a position where they no longer cover the indicia. By sequentially utilizing the actuator members, a child utilizing the toy partially uncovers the indicia, allowing the child to guess what the total indicia will be.

Abstract: A teaching and entertainment device includes a desk-top console which supports a keyboard, an LCD display matrix, and a plug-in cartridge recepticle. A quartet of LCD drivers each control a quadrant of the display under the control of a first microprocessor. A plug-in cartridge is insertable into the console and contains a second microprocessor. Apparatus are provided for establishing a master/servant relationship of the second microprocessor over the first whenever the plug-in cartridge is present.