The invention provides a process for producing vitamin A or its carboxylic acid ester by treating inexpensive and readily available industrial starting materials with potassium hydroxide which is widely employed industrially and is inexpensive.

The invention provides a process for producing vitamin A or its carboxylic acid ester by treating inexpensive and readily available industrial starting materials with potassium hydroxide which is widely employed industrially and is inexpensive.

In a multiple computer system, a computer sends a program annexed with a code representative of the characteristic (e.g., the content and length of the program, the cooperation with other programs, the content of input and output data) of the program to the transmission line. Another computer checks the program based on the code representative of the program characteristic, and receives the progra...

A full-color holographic screen laminate is disclosed, having a well-defined exit pupil, off-axis viewing capabilities, high and uniform gain, and low backscatter, and in addition the capabilities of blocking the zero-order beam and allowing full-color viewing. The laminate in one preferred form includes several layers, including a plano-convex focusing lens (34), a directional diffraction optics ...

This invention describes absorbable and/soluble nonporous or porous polymeric films which have been reinforced with at least partially absorbable and/or soluble oriented structural elements like with oriented molecular chains, crystalline lamellae or filaments or fibers or with structures which have been constructed of fibers. The films of this invention are applied either to join tissues or their...

This invention relates to a channel for supplying water to a vertical-axis Kaplan water turbine, wherein the vertical side walls thereof are oriented in convergent manner in order that, at turbine level, they join an end face of rounded form, of which the radius of curvature is slightly greater than the radius of the guide blades located above the turbine and the sleeve of the turbine shaft and/or...

An improved semiconductor device, adapted to provide electrical current in response to light energy incident thereon, includes a first electrode, an active semiconductor body atop the first electrode, a second electrode atop the semiconductor body, and at least one defect region which is capable of providing a low resistance shunt path for the flow of electrical current between the electrodes of t...

The wind turbine (10) incorporates a wind vane (105) which mechanically controls a valve (100) that directs the output of a turbine driven hydraulic pump (75) to yaw the turbine out of the wind upon a loss of system power or load. The turbine yaws out of the wind at an angular rate that is roughly proportional to rotor speed so that excessive teeter amplitudes are not encountered. The mechanically...

The wind turbine (10) incorporates a wind vane (105) which mechanically controls a valve (100) that directs the output of a turbine driven hydraulic pump (75) to yaw the turbine out of the wind upon a loss of system power or load. The turbine yaws out of the wind at an angular rate that is roughly proportional to rotor speed so that excessive teeter amplitudes are not encountered. The mechanically...

The invention is directed to the production of ethanol by the fermentation of molasses in the presence of the yeasts S. cerevisiae and Schwanniomyces castellii (R69), which is capable of growing and producing amylase in a molasses-containing meduim. The amylase converts starch and higher sugars in the unfermentable component of the medium to a hexose sugar which is converted to ethanol by S. cerev...

A new method for deciding a woman's safe period during the menstrual cycle by showing that ovulation has occurred, particularly involving testing urine or salvia for progesterone or its metabolites. The method is used as a birth control utilising the safe period. A rapid test by chemical or immunological methods is particularly claimed. (Provisional Basic previously advised in week 9009)(0/0)

The camera comprises a body (1) a shutter release member, and a manually operable multiple exposure button (30). This re-cocks the shutter so that a further exposure can be made by pressing the shutter release button without operating the winder (9).

Synergically stabilized mixed form halogenated and/or interhalogenated forms of the free-base polyvinyl-pyridine resin for disinfecting water. The resins may be employed in a single pass column or bed system to provide instantaneous disinfection of bacterially contaminated water.