155 results about "Adulterant" patented technology

A single reagent system and a method to detect and measure oxidizing adulterants in bodily fluid being screened for drugs of abuse are disclosed. The system comprising a strip containing 0.05 to 0.2 micromole/25 sq. mm. of a benzidine derivative and is used to detect sodium hypochlorite (bleach), chlorine, hydrogen peroxide, sodium bromide, sodium iodide, sodium nitrite, and pyridinium chlorochromate adulterants in urine, sweat, saliva, blood or other bodily fluids during screening for drugs of abuse.

The invention discloses an M-MnOx-CeO2 catalyst. The catalyst is prepared by adopting citric acid complexometry through the steps of taking MnOX and CeO2 as active ingredients and taking M as an adulterant; M is FeOx, CuO, CoOx or K2O; the molar ratio of Mn to Ce in the catalyst is (6 to 1) to (1 to 1); when M is FeOx, CuO or CoOx, the molar ratio of metal ions to Ce in M is (1 to 4) to (1 to 1),and when M is K2O, the doping content of K2O is 1wt%. The catalyst can be used for catalytic oxidation of gaseous formaldehyde in a normal temperature condition or used for thermal catalytic oxidationof CVOCs.

The invention relates to an infrared spectrum recognition method for adulterated milk. The method comprises the following steps that pure milk, urea-doped milk and glucose-doped milk are taken as objects of study respectively, an infrared spectrogram of a sample is collected by utilizing an ATR-FTIR (attenuated total reflection-fourier transform infrared spectroscopy) technique, and adulterants are recognized qualitatively and analyzed quantitatively through establishing SIMCA (Soft Independent Modeling Of Class Analogy) and PLS (Partial Least Squares) models. According to the invention, when the concentration of the adulterants of urea and glucose is 0.10-1.00%, the recognition rate of the adulterants of urea and glucose by the method is 100%. When the concentration of the adulterants is 0.01-0.10%, the recognition rate and the rejection rate of the pure milk and the milk doped with urea and glucose by a best model are both greater than 82%, and the effect is favorable. The relevance of a prediction value and an actual measured value of a model is favorable for the adulterants of urea and glucose; the established models have favorable prediction capability, and can be used for the quantitative analysis of multiple adulterants in milk.

The invention discloses a method for quickly identifying pseudo-ginseng. The method comprises steps as follows: 1) getting DNA (Deoxyribose Nucleic Acid) of a sample to be detected as a template, and amplifying the fragments containing the sequences shown as SEQ ID No.1 (Sequence Identification Number); and 2) sequencing the amplified products, analyzing the sequences as shown in SEQ ID No.1; if the bit 140 beginning from 5' end in the sequences as shown in SEQ ID No.1 is T or the bit 207 is T, identifying that the sample is pseudo-ginseng; and if the bit 140 and the bit 207 beginning from the 5' end in the sequence as shown in SEQ ID No.1 are not T, identifying that the sample is not pseudo-ginseng. With the adoption of the method disclosed by the invention, the raw pseudo-ginseng, the sibling species of the raw pseudo-ginseng, the crude medicine, the raw medicinal slices, the powder and the adulterant can be quickly and accurately identified.

The invention relates to a method for preparing a high-frequency ferromagnetic film material with component gradient under the room temperature condition. The invention adopts the proposal that in a vacuum thin film gradient sputtering device, a ferromagnetic material is adopted as a main material target and arranged below a sputtered base plate; simple substances, oxides, nitrides, borides, carbides or phosphides are taken as adulterants to be arranged at the position outwards deviated from the center of the base plate, during the sputtering, the components of the main material target form an even film on the base plate, and the components of an adulterant target form a film provided with the components of the adulterants and distributed in gradient form along a certain direction. The invention adopts the design that the main material target is rightly opposite and the adulterant target is eccentric, the graded distribution of the components of the adulterants is realized, and the purpose that the uniaxial anisotropy is obtained is attained. The saturation magnetization (Ms) of the prepared film material is 8 to 25 kG, the equivalent field (Hk) of the uniaxial anisotropy, etc. is 50 to 400 Oe or higher, and the self-resonant frequency is close to 3G Hz or higher.

The invention which discloses a preparation method of a nanometer strontium titanate catalyst belongs to the technical field of catalysts. The strontium titanate catalyst is obtained through adopting strontium carbonate and butyl titanate as raw materials and an aqueous solution of tartrate as a solvent, a dispersant and a stabilizing agent, preparing a tartrate solution of strontium carbonate, preparing a homogeneous sol, drying, and roasting. The preparation method has the advantages of environmental protection of the selected raw materials, simple process steps, less used equipment, short preparation period, safe production and low cost; and the strontium titanate catalyst prepared through adopting the method of the invention has the advantages of good crystallization degree, small particles, small particle size of 10.2nm, and high specific surface area of 25m<2>/g, and is a catalyst with large specific surface area and strong adsorption capability, so the photocatalytic activity is enhanced. The preparation method can be widely used to prepare the nanometer strontium titanate catalyst and its adulterants, and products prepared through adopting the method of the invention can be widely applied to fields of organic pollutant degradation, hydrogen production through photocatalytic decomposition of water, and the like.

The present invention relates to a method utilizing an EST-SSR marker for identification of traditional Chinese medicine serrate rabdosia herb varieties , the method comprises the following steps: (1) extracting genomic DNA of a sample to be tested; (2) using the DNA extracted by the step (1) as a template, and using a serrate rabdosia herb transcriptome sequence-based EST-SSR core primer group for PCR amplification; and (3) typing amplified products on the basis of sequencing; the EST-SSR core primer group comprises at least 10 pairs of primers of the 24 pairs of primers, each pair of the primers comprise an upstream primer and a downstream primer, and the nucleotide sequences are SEQ ID NO. 1-SEQ ID NO.48. The method can achieve effective and rapid identification of common serrate rabdosia herb medicine-based source varieties and adulterants, and is accurate and reliable in results, simple, easy, high in timeliness, and suitable for the serrate rabdosia herb medicinal material variety identification and variety protection in the market and the production.

The invention discloses a high-ultraviolet high-infrared reflective material and a preparation method thereof. In the invention, a zinc source, phosphoric acid and anhydrous sodium carbonate are used as raw materials to form a zinc sodium phosphate base material, and oxides of metal and rare-earth elements and one or more salts of metal and rear-earth elements are used as adulterants and mixed into the zinc sodium phosphate base material to prepare a high-ultraviolet high-infrared reflective zinc sodium phosphate material; and by taking barium sulfate as a 100 percent datum reflectivity, the ultraviolet reflectivity of the high-ultraviolet high-infrared reflective material is 90-105 percent, the reflectivity of infrared ray with wavelengths of 800-2,000nm is 110-120 percent, and the reflectivity of infrared ray with wavelengths of 2,000-2,500nm is 130-150 percent. The method not only has high infrared reflection, but also can be used for reflecting ultraviolet light harmful to the human body, and can achieve the effects of saving energy and benefiting to the human health.

The invention relates to a yellow inorganic pigment taking bismuth and vanadium as basic adulterants. The chemical formula of the inorganic pigment compound is BiaAbBcCdO4, wherein: A comprises one or more of Si, Ti, Ge, Zr, B, Al, Ga, In or TI; B comprises one or more of V, Nb or Ta; and C is either Mo or W. The yellow inorganic pigment with bismuth and vanadium adulterants has the advantage of better vividness and glossiness than yellow inorganic pigment without bismuth and vanadium adulterants. A bismuth-vanadium yellow inorganic pigment prepared by the technology disclosed in the invention has the advantages of high tinting strength (125>=relative tinting strength>=100), good heat resistance (320 DEG C>=heat resistance>=250 DEG C), high covering power, excellent weather fastness, environmental protection and nontoxic performance, thereby being widely applied to plastics, high-end car coatings or industrial paint.

The invention discloses BaO-TiO2 lead-free Y5U capacitor dielectric material and a preparation method for the same. The dielectric material comprises a main component, sintering aids and modified adulterants; the main component adopts Ba(1-X-Y)MgXCaYTiO3 solid solution, wherein X is equal to 0.001 to 0.1 mol and Y is equal to 0.001 to 0.2 mol; the sintering aids adopt one or the mixture of at least two of low-melting-point oxide, such as Bi2O3, B2O3, CuO, V2O5, ZnO, SiO2, Al2O3 and the like, and low-melting-point glass dust; and the modified adulterant comprises one of or the mixture of at least two of different metal oxide, such as MgO, Ta2O5, Nb2O5, MnO2, ZrO2, CaO, La2O3, Nd2O3, Y2O3, CeO2, WO3, Dy2O3 and the like, and does not contain Pb. Lead-free Y5U capacitor dielectric material can be prepared through reasonable compounding, optimized synthesis and ball milling, which can be sintered within the temperature range of 1,310 to 1,350 DEG C and has excellent dielectric property, wherein epsilon r is equal to 9,500 plus or minus 800, D.F is less than or equal to 2.0 percent, and BDV(AC) is more than or equal to 3.5 kv/mm.

The invention relates to a microporous film reinforced fluoric cross-linked doped ion-exchange film and a preparation method thereof, pertaining to the field of functional macromolecular composite materials. The ion-exchange film takes microposous film as reinforce, containing inorganic adulterant and uses fluoric ion-exchange resin to form a cross-linked film with a mesh structure. The ion-exchange film prepared by the method has the advantages of relatively high high-temperature electric conductivity and dimensional stability and as well as sound mechanical strength.

A method for preparing indium oxide nanometer crystal with controllable shape is provided, which is characterized in that methyl alcohol or ethanol solution in form of compound of indium is taken as precursor, alcoholysis is carried out in methyl alcohol or ethanol solution containing NaOH or KoH, then the alcoholized suspension is placed into a reaction vessel to carry out super alcohol thermal reaction. The indium concentration percentage by mass in the precursor is 0.5-10%, or the adulterant in the precursor is 0.1-10at%, the transitional metallic ions are prepared into non-doped or doped indium oxide nanometer crystal, which is in cubic or bar shape, the yield is up to 80%. The magnesium of the doped In2O3 can be adjusted by the doping volume, alcohol thermal time and temperature.

This invention belongs to the area of sensor technology; concretely it is an organic pressure transmitter and the application method. This sensor's sensitive material adopts the organic material, including the organic conjugate small member semi conducting material, the small molecular material adulterant and so on. This pressure transmitter is sensible, its volume is small, the weight is light, the cost is low, and especially suitable to make the curving pressure transmitter array. This invention may be used in robot's pressure sensation, the sense of touch as well as in the industry automatic control relates to pressure transmitter and the array, the application prospect is broad.

The invention relates to a method for identifying Chinese angelica and its adulterants by utilizing an ITS sequence. The method comprises the following steps: 1, extracting total DNA of the traditional Chinese medicine Chinese angelica and its adulterants; 2, carrying out a PCR amplification reaction by using primers represented by SEQ ID NO.1 and SEQ ID NO.2 respectively with the DNA extracted in step 1 as a template; 3, directly sequencing PCR products; and 4, splicing sequences, contrasting, establishing an NJ tree, and identifying the traditional Chinese medicine Chinese angelica and its adulterants. The ITS sequence is used to identify the traditional Chinese medicine Chinese angelica and its adulterants for the first time. The method has the advantages of simple operation, substantial result, and strong practicality, can realize the rapid and accurate discrimination of Chinese angelica and its adulterants, and is adapted to wide popularization application.

The invention provides a multielement-doped bismuth titanate group lead-free piezoceramic material and a preparation method thereof. Bi4Ti3-2xNbxTax-ySbyO12 ceramic is prepared by an isostatic pressing mode and a conventional solid phase sintering method, wherein x is more than 0 and is less than or equal to 0.1, and y is more than 0 and is less than or equal to 0.1. The preparation method comprises the steps of taking a Bi4Ti3O12 system as a base, taking Nb2O5, Ta2O5 and Sb2O3 as adulterants, and doping a bismuth titanate group lead-free piezoceramic material by multielements (Nb, Ta and Sb); and after mixed ball milling, drying, pre-synthesizing, briquetting, discharging plastic, sintering to power materials under the temperature of 1050-1150DEG C to prepare the compact and lead-free piezoceramic material. By combining the isostatic pressing mode with the conventional solid phase sintering method, the piezoelectric coefficient (d33) of the prepared bismuth titanate group lead-free piezoceramic material is as high as 35pC/N, and the curie temperature of the material is kept to be more than 630DEG C. Furthermore, the preparation technology is stable and reliable, meets the practical applicability requirement of the piezoceramic material, and can be used under special high-temperature environments such as aerospace, aviation, petrochemical industryies, and the like.

Main chemistry constitutes of the Additive is ZnO and Co2O3. Conducting oxides such as Bi2O3íóCo2O3, Nb2O5, Y2O3, La2O3 can be added to the additive. Using mode of mixing and grinding solids, the method dopes Bi, Co, Nb elements; and using method of sol, the method leads in adulterants of Y and La elements and tetrabutyl titanate. Advantages are: (1) the zinc oxide based conducting oxide can be as center of crystallization; increasing use ratio of active material and discharge capacity, and reducing and preventing generation of tree like crystal of zinc, and raising cycle life of electrode; (2) reducing internal resistance of electrode as well as preventing zinc from solved in electrolyte, and hydrogen from separating out.

The invention relates to a method for preparing magnesium boride superconducting material. The method for preparing the magnesium boride superconducting material is that magnesium powder and boron powder are respectively weighted according to 1:0.7-2.5 of molar ratio; adulterant which is one of citric acid and citrate is weighted according to 1:0.01-1 of mass ratio between the total mass of the magnesium powder and the boron powder and the mass of the adulterant is weighted; the magnesium powder, the boron powder and the adulterant are evenly mixed into mixing powder, then sintered under the protection of argon atmosphere at the temperature of 600-1200 DEG C and the product is obtained after the heat is preserved for 0.5-12 hours. The method has short preparation time, low reaction temperature, high efficiency and low cost and is especially suitable for industrial production; the critical current density of the magnesium boride superconducting material prepared by the method is increased remarkably and is especially very high in highfield, thereby being good for the application in highfield and having strong practicability.

A new rapid Fourier transform near infrared (FT-NIR) spectroscopic method is described to screen for the authenticity of extra virgin olive oils (EVOO) and to determine the kind and amount of an adulterant in EVOO. To screen EVOO, a partial least squares (PLS1) calibration model was developed to estimate a newly created FT-NIR Index based on the carbonyl overtone absorptions in the FT-NIR spectra of EVOO and other mixtures attributed to volatile (5200 cm⁻¹) and non-volatile (5180 cm″1) components. Spectra were also used to predict the fatty acid (FA) composition of EVOO or samples spiked with an adulterant using previously developed PLS1 calibration models and modified for this purpose. To identify the type and determine the quantity of an adulterant, gravimetric mixtures were prepared by spiking an EVOO with different concentrations of each adulterant. Based on FT-NIR spectra, four PLS1 calibration models were developed for four specific groups of adulterants each with a characteristic FA composition. These different PLS1 calibration models were used for prediction of type and amount of adulterant. A more comprehensive double or triple adulterant PLS1 calibration models were also developed and tested which provided means of analyzing commercial virgin olive oils which had been adulterated.

A preparation method for an MgB2 block mixed with organics belongs to the preparation filed of MgB2 superconducting material. The existing nanometer particles are mixed with MgB2 which has a high cost and is not beneficial to industrialization manufacture. The invention obtains the MgB2 block mixed with organics by adding boron metal powder with mixed powders into de-ionized water and stirring for one hour; drying the water and then fully mixing the MgB2 block mixed with organics with magnesium powder in a glove box; wherein, the mol ratio of the magnesium power to the boron metal powder is 1 to 1.1: 2; the powers of the adulterants account for 10 to 30 percent of the weight of precursor powder; then the precursor powder is pressed into a block with a pressure of 6 to 14MPa and kept for 5 minutes; finally, the temperature of the block is raised to the temperature between 600 to 900 DEG C at a temperature-raising speed of 6 DEG C/min under floating Argon gas and the temperature is persevered for one hour, and then furnace cooling is carried out to obtain the MgB2 block mixed with organics. The block of the invention has high critical current density and lower manufacture cost and is beneficial to industrialization manufacture.

The invention discloses a wear-resistant membrane structure, which comprises a middle layer, a gradual layer and a diamond like carbon layer, wherein the gradual layer is formed on the middle layer, and the diamond like carbon layer is formed on the gradual layer and the diamond like carbon layer comprises an adulterant. The adulterant is added into the diamond like carbon layer to reduce the internal stress and the frictional coefficient of the diamond like carbon layer. The invention also discloses a die using the membrane structure and a manufacturing method thereof. The atomic structures of the middle layer and the gradual layer are similar to those of a base plate and the diamond like carbon layer respectively, so the diamond like carbon layer is difficult to be peeled off from the base plate through the design of the middle layer and the gradual layer. Besides, the elements such as hydrogen, fluorine, nitrogen, silicon and the like are added into the diamond like carbon layer toreduce the internal stress and the frictional coefficient of the diamond like carbon layer.

The invention relates to the field of semiconductor materials, in particular to a method for preparing a metal film doped with ZnO. The method is characterized by comprising the following steps: a substrate is arranged in a magnetron sputtering room after being cleaned and a reaction room thereof is pumped to vacuum with high cleanliness; high-purity metal strips are taken as adulterants and high-purity Zn are taken as materials, and metal strips are fixed on a Zn target according to a plurality of proportions; pure Ar gas and pure oxygen are taken as sputtering gas and reaction gas to be input into the vacuum reaction sputtering room by the control of a flowmeter for sputtering growth; and annealing treatment is carried out in vacuum environment after growth. The invention has the following beneficial effects: the control of metal doping content is realized, and the effect of oxidation on the metal target during the reaction sputtering is effectively reduced by the pattern of radio frequency sputtering during the reaction, thus leading the sputtering to keep continuous and stable; and finally, by being combined with the corresponding vacuum annealing technology, the optical and electrical properties of the MZO film are optimized. The preparation method simplifies technical processes, reduces the whole development procedure, shortens the period and saves the cost.

The invention belongs to the field of molecular markers and discloses a PCR-RFLP method for rapidly identifying radix tetrastigme and various counterfeits and adulterants of the radix tetrastigme. The method comprises the following steps: 1, extracting the NDA of the medicinal material (namely the radix tetrastigme); 2, carrying out PCR amplification by forward and reverse primers of internal transcribed spacer ITS2 sequences of a pair of amplified ribosomal DNAs; 3, digesting the PCR product by restriction enzyme NCO I; 4, carrying out agarose gel electrophoresis analysis. After the enzyme digestion of amplified products of the DNA of the radix tetrastigme, two DNA fragments with sizes about 335 bp and 200 bp are generated, and the various counterfeits and adulterants are not identified by the NCO I enzyme. By utilizing the differences between the DNA sequences of radix tetrastigme and the counterfeits and adulterants of the radix tetrastigme, a quick, convenient and reliable PCR-RFLP identification method is established and used for identifying whether counterfeits and adulterants are mixed in the radix tetrastigme or not, so that the technical problem that the truth and false cannot be identified by sensory or physical and chemical analysis methods is solved, and the medication safety of the radix tetrastigme is ensured.