Analytic method of calligonum mongolicum karyotypes

The invention discloses an analytic method of calligonum mongolicum karyotypes. Seed germination is carried out, in which seeds are pretreated by 98% concentrated sulfuric acid; a sand seedbed is adopted with a volume ratio of seed to sand of 1:10; culture dishes are subjected to high temperature sterilization at 121 DEG C for 30 min before use; a seed germination culture seedbed is prepared; a seed root tip chromosome test is carried out; seed root tip chromosome dissociation is carried out by using 1M hydrochloric acid in a constant temperature water-bath at 60 DEG C for 20-40 min; therefore, a simple and practicable technical method for calligonum mongolicum karyotypes is provided, which has great significance on realizing the technical effects of obtaining a seedbed and a culture condition that are easy to obtain root tip material in a laboratory, and obtaining a chromosome preparation that is clear, excellent in dissociation state, good in staining effect, and applicable to karyotype ...

Anti-lodging grid device for vegetable and flower breeding

An anti-lodging grid device for vegetable and flower breeding comprises a supporting rod combination, a warp rope and a weft rope. A plurality of supporting rod combinations are arranged and are connected through warp ropes and weft ropes; when the lodging-resistant grid device for vegetable and flower breeding is used, a plurality of supporting rod combinations are unfolded in two symmetrical rows, the supporting rod combinations are vertically inserted into vegetable and flower breeding fields through hammering, and lodging-resistant grids are naturally formed after warp ropes and weft ropes connected with the supporting rod combinations are unfolded; the lodging-resistant grid device for vegetable and flower breeding can be repeatedly recycled, and has the advantages of being low in use cost and avoiding environmental pollution; in addition, the anti-lodging grid device is beneficial to ventilation of vegetables and flowers, reduces diseases, and improves the yield and quality of vegetable ...

Azophilic ketone compound as well as preparation method and application thereof in preparation of drugs for treating neurodegenerative diseases

The invention discloses an azophilic ketone compound, a preparation method thereof and application of the azophilic ketone compound in preparation of neuroprotective drugs. According to the present invention, the nitrogen-containing ketone compound is separated from the fermentation product of the Penicillium sclerotiorum UJNMF0503 CGMCC No.40172, such that the nitrogen-containing ketone compound has nerve protection activity, and has good application prospects in the development of the nerve protection effect drugs.

Azidophilic ketone compound with effect of promoting peripheral nerve injury repair and preparation method of azidophilic ketone compound

The invention discloses an azophilic ketone compound, a preparation method thereof and application of the azophilic ketone compound in a composition, a medicine and a health-care product for promoting peripheral nerve injury repair. According to the present invention, the compound capable of promoting the peripheral nerve injury repair effect is separated from the fermentation product of the Penicillium sclerotiorum UJNMF0503 CGMCC No: 40172; and the compound has good application prospects in the development of the composition, the drug and the health-care product capable of promoting the peripheral nerve injury repair effect.

Photographic protector of electronic vertical position rabat

The utility model relates to the field of medical equipment, a photographic protector of electronic vertical position rabat is specifically provided. This photographic protector of electronic vertical position rabat includes base, lift post, protector and elevating gear, the lift post with the base is connected, the lift post is provided with the lift cogged rail, protector includes protective screen, sleeve pipe, the protective screen with bushing, the cover pipe box is located the lift post, elevating gear includes motor and lifting gear, the motor is fixed in the sleeve pipe, the motor includes the pivot, the pivot through set up in the through -hole in the lifting gear centre of a circle with lifting gear fixed connection, the pivot of motor can drive lifting gear rotates and makes lifting gear follows the lift cogged rail moves and remains throughout the meshing, thereby makes protector for the lift post goes up and down. Should move the photographic protector simple structure of vertical ...

USES AND HEAT-TREATING TECHNOLOGY FOR AL-N-B CAST HIGH-SPEED TOOL STEEL

Real wall temperature testing system for high-temperature heating surface tube of thermal power unit and manufacturing process

The invention discloses a real wall temperature testing system for a high-temperature heating surface tube of a thermal power unit and a manufacturing process. The real wall temperature testing system comprises a thermal couple, a heat collecting block, a protective casing, hoops and a heat-insulating material, wherein at least one thermocouple is provided, and is inserted into the protective casing; one end of the thermocouple is welded on a tube wall, and the other end of the thermocouple is fixed outside a boiler and is connected with a wiring box outside the boiler after being led out; the periphery of the heat collecting block is welded on the tube wall where a thermocouple welding portion is positioned; the heat collecting block is used for fixing the thermocouple and transferring heat rapidly; the heat-insulating material wraps the periphery of the heat collecting block and is fixed through the hoops. By directly welding the thermocouple on the tube wall of the boiler for directly ...

Magnetic nondestructive detector with high signal-to-noise ratio

A magnetic nondestructive detector with high signal-to-noise ratio relates to the technical field of magnetic nondestructive detectors. The probe of the invention is placed with a permanent magnet for establishing static magnetic field and magnetizing the strong magnetic oxide in the checked tube. A magnetic field sensitive component is installed for detecting the stray magnetic field established by the oxide and converting the stray magnetic field to output voltage signal. A magnetic field sensitive component for noise reduction is installed. The magnetic field sensitive component is a linear Hall component with same magnetic field sensitivity same with the magnetic field sensitive component for detection. Two magnetic field sensitive components are parallely installed with a same polarity. The magnetic field sensitive component for detection is positioned at the side of tube wall next to the checked tube in the operating state of probe. The magnetic field sensitive component for noise ...

Control coil of energy-saving alternating current contactor and application thereof

The invention relates to a control coil of an energy-saving alternating current contactor, which comprises coil input ends (A1A2), a normally closed contact (K1), a diode (D5), a pull-in coil, a bridge rectifier circuit and a holding coil, wherein a second control module and the holding coil are connected mutually and then connected in parallel at the two ends of the coil input ends (A1A2); and the normally closed contact (K1), a first control module and the pull-in coil are connected in series and then connected in parallel at the two ends of the coil input ends (A1A2). Compared with the prior art, the control coil of the energy-saving alternating current contactor has the following advantages that: the power consumption of the coils of the contactor is reduced remarkably when the coils are in a hold mode; a circuit power factor is improved greatly, the reactive power loss of power distribution and transmission is reduced and the quality of power networks is optimized; and the noise pollution ...

Process for preparing environment-friendly silicon rubber shed or awning cloth

The invention discloses a process for preparing environment-friendly silicon rubber shed or awning cloth. The process comprises the following steps of: matching silicon rubber serving as a base with a reinforcing filler, an inorganic flame-retardant filler, a mineral flame-retardant filler, a metallic compound, a heat-resistant additive and a rolling aid to prepare flame-retardant silicon rubber;compounding the flame-retardant silicon rubber with a single-layer or multi-layer reinforced fabric treated by a coupling agent; and vulcanizing to prepare the silicon rubber shed (awning) cloth witha sandwich structure. The combustion performance of the prepared silicon rubber shed (awning) cloth passes Britain BS 6853 Code of Practice for Fire Precautions in the Design and Construction of Passenger Carrying Trains, and the silicon rubber shed (awning) cloth passes the certification of TB/T 3193 Decorating Materials and Indoor Air Limit of Harmful Substance for Railway Locomotive and Vehicle, and ...

Greenhouse for preventing top film ponding

The utility model discloses a greenhouse capable of preventing a top film from accumulating water, which comprises a rear slope support column, a rear wall body, two side wall bodies, an upright post, a support framework and a plastic film, and a plurality of groups of rear slope support columns which are uniformly distributed at intervals are fixed at the upper part of the rear wall body and are inclined towards the indoor space; multiple layers of heat preservation felts cover the side faces, away from the indoor space, of the multiple sets of rear slope supporting columns; the top end of each rear slope supporting column is connected with one end of a supporting framework, the other end of the supporting framework is fixed to the ground, and the supporting framework is covered with a plastic film; the supporting framework comprises a horizontal section and an arc-shaped section, the end of the horizontal section is connected with the top end of the backward slope supporting column in ...

Control coil of energy-saving alternating current contactor and application thereof

The invention relates to a control coil of an energy-saving alternating current contactor, which comprises coil input ends (A1A2), a normally closed contact (K1), a diode (D5), a pull-in coil, a bridge rectifier circuit and a holding coil, wherein a diode (D5) and the holding coil are connected mutually and then connected in parallel at the two ends of the coil input ends (A1A2); and the normally closed contact (K1), a bridge rectifier and the pull-in coil are connected in series and then connected in parallel at the two ends of the coil input ends (A1A2). Compared with the prior art, the control coil of the energy-saving alternating current contactor has the following advantages that: the power consumption of the coils of the contactor is reduced remarkably when the coils are in a hold mode; a circuit power factor is improved greatly, the reactive power loss of power distribution and transmission is reduced and the quality of power networks is optimized; and the noise pollution is reduced ...

Anti-lodging supporting rod and rope tying device for vegetable and flower breeding

The invention discloses an anti-lodging supporting rod for vegetable and flower breeding and a rope tying device. The lodging-resistant supporting rod comprises a supporting rod body, a supporting disc and supporting legs. The supporting rods are fixedly arranged in the middle of the upper plate surface of the supporting plate; the supporting legs are uniformly distributed and fixedly arranged on the lower plate surface of the supporting plate; the rope knotting device comprises a rope knotting rod, a rope locking trigger, a rope locking connecting rod, a rope locking plate combination and a rope support combination. Wherein the rope locking trigger and the rope locking plate combination are connected with the rope knotting rod in a hinged mode, the rope locking trigger and the rope locking plate combination are connected through a rope locking connecting rod, the rope support combination is fixedly arranged on the rope knotting rod, a replaceable rope group is rotationally arranged on ...