Abstract: This invention relates to a process for producing a complex carbohydrate, which comprises: selecting, as enzyme sources, a culture broth of a microorganism capable of producing a sugar nucleotide from a nucleotide precursor and a sugar, or a treated product of the culture broth, and a culture broth of a microorganism or animal cell capable of producing a complex carbohydrate from a sugar nucleotide and a complex carbohydrate precursor, or a treated product of the culture broth; carrying out an enzyme reaction in an aqueous medium containing the enzyme sources, the nucleotide precursor, the sugar and the complex carbohydrate precursor to form and accumulate the complex carbohydrate in the aqueous medium; and recovering the complex carbohydrate from the aqueous medium, and a process for producing a sugar nucleotide, which comprises selecting, as an enzyme source, a culture broth of a microorganism capable of producing a sugar nucleotide from a nucleotide precursor and a sugar, or a treated product of the cultur

Abstract: A synthesis of phosphorus-doped diamond by a microwave plasma method using a volatile hydrocarbon and hydrogen mixed therewith, as a reaction gas, wherein phosphorus is used as a dopant, and hydrogen bonded to the phosphorus is dissociated so that the phosphorus is introduced into diamond as an impurity without being bonded to hydrogen.

Abstract: There is provided a method for reducing absorptivity of moisture of an insulation film made of SiOF and for achieving a highly reliable semiconductor device.In a method for manufacturing a semiconductor device utilizing a silicon oxide film including fluorine as a layer insulation film of a semiconductor integrated circuit, an inert gas 14 is introduced in addition to source gases 11-13 during the formation of the silicon oxide film including fluorine (FIG. 1).

Abstract: The present invention provides a process for producing riboflavin efficiently at a low cost, wherein riboflavin is formed and accumulated in a medium by culturing a microorganism carrying a recombinant DNA prepared by inserting into a vector DNA a DNA which is derived from a microorganism belonging to the genus Corynebacterium or Brevibacterium and which, upon introduction into a riboflavin-requiring microorganism, confers on the microorganism the ability to complement its riboflavin requirement.

Abstract: An audio signal recording apparatus is constructed to record a track number signal which allows the recording of an index number signal indicating a pause portion before a music piece also at the beginning of the recording operation. An audio signal to be recorded is delayed by a predetermined delay time period, to produce a delayed audio signal. Upon starting the recording operation, a muting operation is effected to the delayed audio signal and a resultant signal is recorded on the recording medium during the predetermined muting period after the start of the recording. During this period, a subcode information signal containing the index number signal indicating a number "0" is also recorded on the recording medium.

Abstract: An audio signal recording apparatus is constructed to record a track number signal which allows a sure detection of a head position of a music piece. An audio signal to be recorded is delayed for the recording by a first predetermined time period. A start time of each music piece is detected by a transition from a silent state to a sound bearing state of the audio signal, and a track number signal is incremented at a timing of a second predetermined time period, which is shorter than the first predetermined time period, after a detection of the start time of a music piece, and the track number signal having been incremented.

Abstract: Disclosed is a process for producing ascorbic acid-2-phosphate which comprises the steps of reaction, in aqueous medium, of ascorbic acid with a phosphate donor in the presence of cells, treated cells, a culture broth or a treated culture broth, of a microorganism belonging to the genus Escherichia and carrying a recombinant DNA comprising a gene isolated from a microorganism belonging to the species Pseudomonas azotocolligans and coding for ascorbic acid-phosphorylating enzyme until a recoverable amount of ascorbic acid-2-phosphate is accumulated in the aqueous medium, and recovery of ascorbic acid-2-phosphate therefrom.

Abstract: A process for the preparation of ascorbic acid-2-phosphate, which comprises reacting ascorbic acid or araboascorbic acid with a phosphate donor other than ATP in an aqueous medium in the presence of an effective amount of an enzyme derived and capable of preferentially catalyzing the enzymatic phosphorylation in the 2-position of ascorbic acid or araboascorbic acid by said phosphate donor, and recovering the resultant ascorbic acid-2-phosphate from the reaction solution.