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234 results about "Poisonous effects" patented technology

Cell toxicity determination method in cigarette mainstream flue gas

The invention relates to a method for mensurating cytotoxicity of mainstream cigarette smoke. The method is characterized in comprising the following steps: firstly, a cultured cell is directly put to the mainstream cigarette smoke diluted by clean air and is exposed; secondly, the cell is subjected to neutral red staining; according to the situation that the cell is ingested with neutral red, a spectrophotometer of a readable porous culturing plate is utilized to mensurate an absorbance value; and the cell is compared with a contrastive sample exposed in the clean air, thereby judging the toxicity of the mainstream cigarette smoke. The method is based on a testing principle that the cultured cell is directly put to the mainstream cigarette smoke and is exposed; the level for ingesting the neutral red by the cell is in positive proportion to the number of viable cells; when the toxic effect of the mainstream cigarette smoke is larger, the survival cells exposed in the mainstream cigarette smoke is fewer, correspondingly the dye absorption amount is less and the absorbance value is lower. The method can quantitatively evaluate the cytotoxicity of a tested object, has the characteristics of simple operation, high sensitivity and reliable result, and creates a new method for mensurating the cytotoxicity of the mainstream cigarette smoke.
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC

Screening method of safety and efficacy of skin antioxidants through use of a plurality of normal human skin cells

The invention discloses a screening method of safety and efficacy of skin antioxidants through use of a plurality of normal human skin cells. The screening method includes the following steps: (1) separation, culture and identification of normal human primary cells; (2) toxicity test of substances for testing; (3) preparation of the substances for testing and concentration determination of the substances for testing; (4) determination of ultraviolet-light induced radiation dose; and (5) verification of antioxidant effects of the substances for testing. The normal human skin cells are prepared through standardized culture in vitro, so that the normal human skin cells has strong division propagation capability, high degree of standardization, less difference among batches, and the same activity and functions as that in vivo. Results which are obtained through use of the normal healthy human skin cells are more reliable than the results obtained through use of animal or human cell lines. Through use of the screening method, toxic effects and antioxidant efficacy of the substances for testing can be evaluated in two aspects including a qualitative aspect and a quantitative aspect. The method, through replacement of the living animal and human skin, can be directly used for toxicity and efficacy tests of antioxidant substances in products including chemicals, cosmetics, pharmaceuticals and the like.
Owner:GUANGZHOU HUADAI BIOLOGICAL TECH CO LTD

Health-care product capable of supplementing multiple trace elements and preparation method thereof

The invention provides a health-care product capable of supplementing multiple trace elements. The health-care product is prepared from the following raw materials in parts by weight: 30-40 parts of calcium lactate, 20-30 parts of zinc lactate, 20-30 parts of magnesium lactate, 10-20 parts of ferrous lactate, 1-10 parts of manganese gluconate, 1-5 parts of copper gluconate and 0.1-1 part of selenic acid lipopolysaccharide. The health-care product has the advantages that the multiple trace elements are scientifically mixed together, the raw materials are subjected to microwave baking, sterilized and ground into finely pulverized powder, the lactate series trace elements and the gluconic acid series trace elements which have high solubility, fast solution rate, high bioavailability and good mouth feel are adopted and have the effects of assisting human bodies in absorbing the trace elements, reducing the morbility of osteoporosis, preventing cardiovascular diseases, resisting tumors and enhancing the metabolism and immunity of the organism, and especially the selenium can form antioxidant enzymes in vivo and has the effects of protecting cell membranes from undergoing oxidative damage, maintaining the permeability of the cell membranes, reducing the toxic effect of poisonous substances and preventing cancers.
Owner:哈福科技(武汉)集团有限公司

Au@Au/Pt core-shell structure nano catalyst applied to alcohol fuel cells

The invention discloses an Au@Au / Pt core-shell structure nano catalyst applied to alcohol fuel cells. The nano catalyst is in a concave cube shape, and the size is 29+ / -4nm; the inside of the nano catalyst is a gold core, and the outside of the nano catalyst is a gold / platinum shell. The catalyst is prepared by the following method which comprises the steps: firstly, preparing gold nanoparticles;then depositing silver on the surfaces of the gold nanoparticles to form an Au@Ag core-shell structure nano cube; then utilizing an in-situ growth method to prepare the Au@Ag / Au core-shell structure nano cube; finally, adding chloroplatinic acid to displace silver out to obtain a product. According to the catalyst disclosed by the invention, a pure platinum shell is changed into a shell prepared from platinum and gold jointly, so that platinum loading capacity is further reduced, and cost is reduced; meanwhile, the catalyst has an unique core-shell structure, has richer atom distribution and larger surface area, further interacts with the gold core to achieve a Plasmon resonance effect and can effectively enhance catalytic activity and weaken a poisonous effect; to alcohol oxidization reaction under the alkali condition, the nano catalyst has the advantages of better stability and catalytic activity.
Owner:UNIV OF JINAN

Ocean ecologic toxicology research platform based on microfluidic chip

The invention relates to an ocean ecologic toxicology research platform based on a microfluidic chip. The invention provides a microfluidic chemotactic chip. The microfluidic chemotactic chip is formed by the following units: a chip cell culture unit, a chip composite pollution generation unit, a chip pollutant concentration gradient generation unit, a chip control unit and a chip detection system. By integrating various pollutant composite units, the pollutant concentration gradient generation unit, and the array cell culture, cell stress, marking and corresponding detection units on the chip, the multi-index, multi-parameter and multi-response-event analysis for the damage action process of the environmental pollution for the marine organisms can be realized, the toxicity effect of the pollutants can be determined, and a great amount of important toxicology information can be acquired in a single experiment. The ocean ecologic toxicology research platform is significant in functionalcharacteristics in integration and flux compared with the traditional ecologic toxicology toxicity experimental method, and is simple in operation and low in cost; and meanwhile, the platform also has certain universality and can be extensively used for other research fields of the marine environmental sciences.
Owner:DALIAN UNIV

Chinese medicine composition for treating liver-stomach disharmony

The invention relates to a Chinese medicine composition for treating liver-stomach disharmony. The Chinese medicine composition comprises the following raw materials in parts by weight: 5-20 parts of cortex moutan, 5-20 parts of fructus gardenia, 5-25 parts of radix bupleuri, 10-30 parts of angelica sinensis, 10-40 parts of radix paeoniae alba, 5-25 parts of radix curcumae, 5-20 parts of rhizoma cyperi, 5-20 parts of pericarpium citri reticulatae viride, 5-20 parts of fructus aurantii, 5-20 parts of fiveleaf akebia fruit, 5-25 parts of cuttlebone, 5-20 parts of bulbus fritillaria thunbergii, 10-30 parts of rhizoma corydalis, 10-40 parts of salviae miltiorrhizae, 10-30 parts of ligusticum wallichii, 5-20 parts of fructus toosendan, 5-25 parts of radix scutellariae, 10-40 parts of lily, 5-20 parts of radix platycodi, 5-20 parts of citrus chirocarpus, and 5-15 parts of liquorice. The Chinese medicine composition has the efficacies of soothing liver, harmonizing the stomach, invigorating the circulation of blood, regulating qi, removing stasis, relieving the pain, clearing away the heart fire and dispelling melancholy, is obvious in curative effect on treating the liver-stomach disharmony, and reliable in effect; the Chinese medicine composition is wide in medical herbs resources of components and simple and convenient to prepare, and has no toxic and side effects.
Owner:许高山

Mosquito-repelling itching-relieving and anti-inflammation floral water and preparation method thereof

The invention provides mosquito-repelling itching-relieving and anti-inflammation floral water and a preparation method thereof. The floral water is prepared from the following raw materials in partsby weight: 7 to 14 parts of radix angelicae dahuricae, 6 to 12 parts of flos lonicerae, 4 to 8 parts of herba menthae, 5 to 10 parts of folium perillae, 6 to 10 parts of clove, 3 to 7 parts of fructuscnidii, 8 to 16 parts of folium mori, 4 to 9 parts of fructus kochiae, 3 to 6 parts of radix glycyrrhizae, 6 to 15 parts of herba portulacae, 10 to 20 parts of herba taraxaci, 9 to 14 parts of radixpaeoniae alba, 10 to 18 parts of butanediol, 2 to 5 parts of trehalose and 30 to 50 parts of deionized water. The Chinese herbal extract is used as raw materials of the floral water to substitute slightly-toxic chemical substances, the floral water is nontoxic and free from side effect for the human body, the mosquito repelling time of the floral water can reach more than 9 hours, and the mosquitorepelling effect is good. Meanwhile, the floral water has significant effect for the inflammation and itches caused by bites of the mosquitoes, the itching relieving effect is fast, and by virtue ofthe synergistic effect of all components in the floral water, a better itching relieving and anti-inflammation effect can be realized.
Owner:SUZHOU INST OF TRADE & COMMERCE

Transverse wave couplant for power station boiler steel pipe inner wall oxide-film high frequency ultrasonic measurement, and preparation method thereof

The invention discloses a transverse wave couplant for power station boiler steel pipe inner wall oxide-film high frequency ultrasonic measurement, and a preparation method thereof. The transverse wave couplant is prepared by honey and a mixture of one or more than one carbohydrate. Compared with the prior art, the transverse wave couplant has the advantages of: (1) cheap and easily available raw material: most common carbohydrate in the market; (2) easy cleaning: compared with a common machine oil industrial couplant, the transverse wave couplant can be cleaned only by water flushing or paper towel wiping; (3) pure natural raw material which has no poisonous effects and possesses high safety; (4) neutrality: the transverse wave couplant is difficult to corrode an ultrasonic transducer and an object for measurement, and has a wider application scope; (5) viscosity greater than 300mpa: the transverse wave couplant is suitable for various supersonic reflectoscopes; and (6) sound detection effect: the transverse wave couplant is innovative at home, greatly accelerates domestic ultrasonic wave transverse wave detection development, and has high market values and bright application prospects.
Owner:XIANGTAN HONGYUAN ELECTRONICS SCI & TECH CO LTD
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