摘要:
The invention provides a cavity resonator for an electron spin resonance device in which modulation coils for generating a modulation magnetic field to be applied to a sample in the cavity resonator are arranged at an exterior of the cavity resonator. The cavity resonator comprises a body being rectangular-defined by predetermined length, width and height. The body has a pair of side walls being vertical to the modulation magnetic field. The side wall respectively have at least thin portions of a thickness being nearly equal to or less than a skin depth of a skin effect appearing at the side walls. The modulation coils are arranged on the thin portions so as to have the modulation magnetic field be transmitted through the thin portions into the interior of the cavity resonator. Alternatively, it is possible that inner walls of the body are overlaid with metallic foils having at least sufficiently smaller thickness than a skin depth of a skin effect appearing at the walls.
摘要:
The invention provides an electron spin resonance device in which a measuring sample is arranged in a cavity resonator in a polarization magnetic field for a receipt of a predetermined microwave power and a subsequent resonance signal detection from said sample. A microwave signal amplifier is arranged on a prestage of a microwave detection circuit for an addition of a part of an output from a microwave oscillator at an input terminal of said amplifier so as to accomplish a balanced cancellation of a microwave reflective power from said cavity resonator.
摘要:
In a fixed polarized magnetic field generated by permanent magnets 10, a cylindrical cavity resonator 12 and a coil 14 modulating the magnetic field are provided. A micro-wave f generated from a micro-wave oscillator 16 is supplied through an isolator 18 and a subsequent attenuator 20 and then a circulator 24 to the cavity resonator. The oscillation output of a modulating frequency oscillator 42 is supplied to the coil 14. A movable end plate 60 is moved by a driving feature 58 to vary the resonance frequency f.sub.0 for a detection thereof and a subsequent negative feed back to a micro-wave oscillator 16 through a circuit comprising a low frequency amplifier 48, a phase detector 50, a low frequency oscillator 54, a phase shifter 56 and a micro-wave oscillator power source 52 thereby the micro-wave frequency f is so swept as to be maintained to be equal to the resonance frequency f.sub.0.
摘要:
A solidified biomass consisting of semi-carbonized or pre-semi-carbonized solid matter is pressure-formed from raw biomass material while being heated under a substantially sealed-up condition to allow hemicellulose among the main components of the raw biomass material, i.e. lignin, cellulose and hemicellulose, to be thermally decomposed and to allow a low-temperature reaction to occur between the cellulose and lignin while maintaining their skeletons. The pre-semi-carbonized solid matter or semi-carbonized solid matter has a maximum compressive strength of 60-200 MPa and calorific value of 18-23 MJ/kg.
摘要:
An over-discharge protection circuit included in a charge circuit in a portable apparatus having a portable portion and a body, the portable portion and body being interconnected by two charging terminals of the body and two terminals of the portable portion when the portable portion is placed on the body, the over-discharge protection circuit comprising: a first resistor connected across a battery charger for detecting a discharge current when a power source of the battery charger is accidentally turned OFF during a charge of the battery; a switching circuit connected between a load and a battery for disconnecting the load and battery when the power source of the battery charger is accidentally turned OFF during a charge of the battery; a switch control circuit connected to the switching circuit through a third resistor for turning the switching circuit ON/OFF; a second resistor connected between the switching circuit and the switch control circuit for controlling a flow of a charge current to the switch control circuit; and a diode connected between the switch control circuit and the first resistor for allowing a flow of the discharge current to the first resistor when the power source of the battery charger is accidentally turned OFF during a charge of the battery.
摘要:
In a magnetic field generating device for an ESR system in which a pair of permanent magents are respectively attached to opposing surfaces of a pair of stationary yokes arranged in opposite and spaced apart relationship with each other and a continuously varying magnetic field is caused to generate in a space between the opposing permanent magnets, a plurality of movable yokes for continuously changing the distance between the stationary yokes are arranged to at least one of the pair of stationary yokes so that they are moved individually thereby enabling the magnetic resistance of a magnetic path formed by the permanent magnets, stationary yokes and movable yokes to vary continuously. The device of this invention can vary the magnetic field intensity continuously and finely at high accuracy and can be used at a reduced cost and size with improved operationability in ESR system.
摘要:
A reversal image development type electrophotographic printing system including a rotatable drum (1) coated with a light sensitive layer and an image developing roller (31) co-rotatable with the drum and using a printing medium composed of carriers and toner. To prevent superfluous toner during start-up, a predetermined bias voltage (-VB) differing to a normal bias voltage (+VB) is supplied to the image developing roller and the drum, and the image developing roller, a precharger (2), and power supplies (52, 53) for supplying the initial and normal bias voltages are energized in a predetermined start sequence. In addition, to prevent carrier extraction at a stop condition, the drum, the image developing roller, the precharger, and the power supply (53) are deenergized in a predetermined operation stop sequence.A printing medium including a resin toner comprising a mixed resin and magnetized powder and a charge control medium mixed with the resin toner may be used, and prevention of the surplus resin toner extraction in the start-up condition also may be achieved.
摘要:
A method of producing aldehydes in a hydroformylation system wherein an olefinic compound is reacted with hydrogen and carbon monoxide in a hydroformylation reaction in the presence of a catalyst is provided. The hydroformylation system includes a reactor and a downstream catalyst process path. The temperature in the reactor and downstream catalyst process path is less than approximately 100° C., and preferably less than approximately 85° C., and most preferably less than approximately 80° C., such that formation of high boiler components from the reaction are substantially minimized. Further, the method of the present invention reduces degradation or decomposition of the catalyst, and in particular the ligand compound.
摘要:
Disclosed herein is a process for preparing naphthalene or a derivative thereof, which comprises subjecting a benzene derivative having at least one substituted or non-substituted aliphatic hydrocarbon group and being capable of forming a naphthalene ring to cyclodehydrogenation in the presence of a zirconia catalyst containing chromium in an oxidized state.
摘要:
A method of separating 2,6-dimethylnaphthalene from a feed material containing a mixture of dimethylnaphthalene isomers comprises the steps of:adsorption separation using an adsorbent of a zeolite Y containing alkali metal or zinc and a desorbent of an organic solvent mainly composed of paraxylene and/or orthoxylene to obtain a solution consisting of the desorbent and the feed material containing 2,6-dimethylnaphthalene at a concentration of at least 60 wt % on the feed material other than desorbent; andcrystallization of the solution having a concentration of the desorbent at 30 to 90 wt % to obtain 2,6-dimehtylnaphthalene of high purity in a crystalline form.