923 results about "Toxic chemical" patented technology

Self-organized, or self-assembled, nanowires of a first composition may be used as an etching mask for fabrication of nanowires of a second composition. The method for forming such nanowires comprises: (a) providing an etchable layer of the second composition and having a buried insulating layer beneath a major surface thereof; (b) growing self-assembled nanowires on the surface of the etchable layer; and (c) etching the etchable layer anisotropically down to the insulating layer, using the self-assembled nanowires as a mask. The self-assembled nanowires may be removed or left. In either event, nanowires of the second composition are formed. The method enables the formation of one-dimensional crystalline nanowires with widths and heights at the nanometer scale, and lengths at the micrometer scale, which are aligned along certain crystallographic directions with high crystal quality. Further, the method of the present invention avoids traditional lithography methods, minimizes environmental toxic chemicals usage, simplifies the manufacturing processes, and allows the formation of high-quality one-dimensional nanowires over large areas.

A battery powered portable human body carrying electronic human breath filtration device is an electronic nose mask and is the most ideal alternative to conventional filter paper type nose mask. It utilizes electronic ionization technique and electrostatic field to remove air borne particles, dust, pollens, contaminants, bacteria, viruses, toxic chemical, fume and tobacco smoke from human inhalation and exhalation breath. It interacts with human breathing action as the air flow driving system to move the inhalation and exhalation breaths through the electronic filter elements, in addition to a front louver cover and a rear louver cover's protection as pre-filters. The system requires very low running current and uses small batteries usually found in household electronics. This filtration system is light weight with negligible air flow resistance and is integrated into the nose mask which is connected to a pocket size control system via a connection cable.

This invention is comprised of a system, protocol, method and apparatus for the assessment of properties that may have been, or are being, subject to clandestine drug manufacturing and/or processing activities. The invention includes a comprehensive home test kit to be used in or upon a suspect premises to detect, identify, and delineate toxic chemical hazards that may have originated from an illegal drug making operation. The test kit is designed to be conveniently equipped with all-inclusive content consisting of an assortment of user-selected sampling equipment, media, containers, materials, documentation, instruction manual, as well as an audio-visual instructional media pack. This Kit is designed to enable a person of average intelligence to conduct the sampling activities and the Kit to a designated analytical laboratory for processing and reporting of results in order to determine the risk presented by a property and damages it may have sustained.

The invention discloses a porous complex gel-nanofiber oxygen permeation dressing and a preparation method thereof. The method comprises the following steps: obtaining a collagen nanofiber membrane by adopting a collagen solution by virtue of an electrostatic spinning method; performing chemical crosslinking on two natural and non-toxic macromolecule polysaccharides such as chitosan and alginic acid, and preparing complex gel; and preparing the porous sponge-nanofiber double-layer composite material in a freeze-drying mode, wherein the upper gel layer of the dressing is in a sponge state during drying and is in a gel state after moisture absorption. The biological wound dressing is prepared under the condition that any toxic chemical crosslinking agent is not added, the process is simple, and the safety is high. The prepared biological wound dressing disclosed by the invention has the characteristics of excellent oxygen permeation performance, water-absorbing quality, water permeability, moisture penetrability and high biocompatibility, a physiological wet environment of the wound surface can be maintained, wound healing and effective haemostasis are promoted, wound infection can be avoided, the recovery is accelerated, the wound surface can be effectively recovered, and the dressing is applied to multiple wound surfaces such as trauma, burns and ulceration.

This invention relates to a fully adjustable personal back rest and seat cooling and heating system specifically designed to provide several hours of high efficiency cooling or heating when used by a user as either a seat cushion and back or a mattress or sleeping surface. This combination personal back rest and seat cooling and heating system invention is capable of delivering several hours of high efficiency personal cooling or heating without the use of caustic or toxic chemicals with virtually no risk of injury associated with its use. This personal back rest and seat cooling and heating system invention is portable, battery powered, lightweight and durable in construction and specifically designed for use in harsh climatic conditions where access to refrigeration and heating are limited or unavailable.

The invention discloses a composite antibacterial anion air cleanser and a preparation method thereof. The air cleanser comprises the following raw materials by weight percent: 0.5-30 % of colorless and transparent anion crystal/powder, 0.5-2 % of photocatalyst powder, 1-10 % of a transparent nano silver solution, 1-15 % of food-grade ethanol, 0.1-5 % of natural plant essential oil and 20-50 % of deionized water. The air cleanser provided by the invention can rapidly decompose formaldehyde, benzene, ammonia and other harmful gases in spaces in a few minutes, with a cleansing rate of more than 98 %, and is rapidly and durably antibacterial and antivirus; furthermore, the air cleanser does not contain toxic chemical compositions, and is free of any side effects on the body and secondary pollution. According to the invention, the air cleanser decomposes odor molecules through anion and photocatalytic decomposition factors to remove odors, and can durably release a lot of negative oxygen ions, wherein the negative oxygen ions are known as "air vitamin" and are beneficial for human's physical and mental health, so that the air cleanser provided by the invention has relatively good health care function.

A shoe, especially a boot, which has a protective function against toxic chemical agents, especially chemical warfare agents, and a multilayer layered construction, which has an outer layer, which faces away from the foot when the shoe is worn, and an inner layer, especially an inner shoe lining, which is assigned to the outer layer and faces towards the foot when the shoe is worn, wherein, in addition, an adsorption layer based on an adsorbent material, especially activated carbon, which adsorbs toxic chemical agents, is arranged between the outer layer and the inner layer. In this way, efficient protection against toxic chemical agents, especially chemical warfare agents is achieved, and a high degree of wearing comfort is achieved at the same time.

A chemically functionalized cantilever system has a cantilever coated on one side thereof with a reagent or biological species which binds to an analyte. The system is of particular value when the analyte is a toxic chemical biological warfare agent or an explosive.

The invention relates to a MOF (metal organic framework)-modified materials and methods of making and methods of using same. The MOFs are covalently bound to the materials. Examples of suitable materials include fibers and thin films. The MOF-modified materials can be made by forming MOFs in situ such that they are covalently bound to the materials. The MOF-modified materials can be used in methods where gases and/or toxic chemicals are absorbed.

This invention describes a nucleic acid testing procedure in a form of portable device or a test kit for the purposes of clinical genetic testing, infectious disease diagnostics, biodefense, forensic analysis, paternity testing, pet and cattle breeding, food testing, etc. This testing does not include toxic chemicals and is simple enough to be used by an average individual without any special laboratory training. The procedure includes collecting the sample, potential isothermal amplification of the whole genomic DNA or a fragment of genomic DNA, denaturing double-stranded DNA into single-stranded form, hybridizing the denatured sample DNA to single-stranded allele-specific tester oligonucleotides complementary to the analyzed DNA sequence of interest, selective removal of single-stranded DNA from DNA hybrids, and finally detecting the label in double-stranded hybrids to determine the presence or absence of a particular sequence in the initial sample.

A protective glove having a protective function against toxic chemical agents, especially chemical warfare agents, and a multilayer construction including a breathable layer is disclosed. The glove has a support layer and a barrier layer, which is assigned to the support layer and which faces the hand when the glove is worn, prevents or at least retards the passage of toxic chemical agents, and contains an adsorption layer based on an adsorbent material, such as activated carbon, which adsorbs toxic chemical agents. The barrier layer has, in addition to the adsorption layer, a membrane, which is at least preferably impermeable to water and air, but permeable to water vapor, and which retards the passage of toxic chemical agents or is at least essentially impermeable to toxic chemical agents. The membrane is arranged between the support layer and the adsorption layer. The protective glove has a high degree of wearing comfort with good tactility properties and at the same time provides excellent protection against toxic chemical agents.

The present invention relates generally to chemical and biological decontamination solutions and methods of using them. The invention is useful for decontaminating a wide range of compounds and organisms. In particular, the systems, methods, solutions, and formulations of the invention can be used to remove and/or neutralize organophosphates and other toxic chemicals, bacteria, bacterial spores, fungi, molds and viruses.

A self-cleaning self-decontaminating coating capable of producing hydroxyl radicals, in the presence of UV radiation and moisture, in sufficient amounts to destroy organic contaiminants no the coating surface.

Briefly, this invention uses one or more pressure vessels having installed therein on its inside a balloon of flexible and non-expandable wall to smoothly and continuously deliver a chemical to any end user without contamination and gas dissolution. Since the balloon installed inside the pressure vessel isolates a high pressure gas from the chemicals, gas dissolution in the chemical and the resulted gas bubble problems are effectively eliminated. Further, contaminants in the high pressure gas which fills the balloon will not be transferred into the chemical and the extremely toxic chemical will not be transferred into the gas to be exhausted as a serious environmental issue. Unlike the vacuum/pressure system, the contamination by the ambient air leaking into the system is avoided because the disclosed delivery system is always with the pressure higher or equal to the ambient pressure.

The invention discloses a livestock feed additive composition and the preparation method and the application thereof. The livestock feed additive composition comprises following ingredients by weight percentages: 70 to 90 percent of medicated leaven, 70 to 90 percent of sweetflag, 35 to 45 percent of tangerine peel, 35 to 45 percent of dyers woad leaves, 35 to 45 percent of isatis root, 25 to 35 percent of white peony, 25 to 35 percent of divaricate saposhnikovia root, 25 to 35 percent of fennel, 25 to 35 percent of liquorice and 90 to 110 percent of lack tartary buckwheat. The invention adopts natural Chinese herbal medicine, can fully avoid damaging human bodies by added chemical synthetic drugs and toxic chemical substances, does not generate the cross drug resistance of the drugs shared by human beings and livestock, is favorable to the enhancement of the organism immunity of livestock and improves the metabolism capability of the livestock so as to achieve the aims of resisting diseases and promoting the growth of the livestock .

A method and system for disinfecting and disinfesting a commodity, such as a perishable agricultural commodity, by treatment with an environment of low oxygen/high ballast gas with cycled pressure changes that overwhelm and damage the respiratory system of the insect without damaging the host commodity. The system and method may also include the introduction of disinfectants, antiseptics and other toxic chemicals or the exposure to radio frequencies with intense electric fields that may increase the metabolic activity of the pest or decrease the fitness of the pest within the low oxygen environment. Treatments according to the methods can also increase the shelf life of agricultural commodities by eradicating or delaying the growth of bacteria, fungi, protozoa and other microbial pests.

The invention provides a microemulsified cutting fluid. The microemulsified cutting fluid comprises following ingredients, by weight, 3.00 to 21.00% of a pH value conditioning agent, 0.50 to 4.00% of an antirust agent, 0.50 to 2.00% of a bacteriostatic agent, 6.00 to 18.00% of an anionic surfactant, 1.00 to 5.00% of a nonionic surfactant, 1.00 to 4.00% of a corrosion inhibitor, 4.00 to 15.00% of a base oil, and 40 to 50% of water. The microemulsified cutting fluid possesses excellent rust resistance, lubricating properties, and especially excellent corrosion resistance on aluminium alloy, so that a problem that corrosion resistance of conventional microemulsified cutting fluid on different aluminium alloy processing is poor is solved. The microemulsified cutting fluid is suitable for processing of metal such as aluminium parts and steel parts. The microemulsified cutting fluid contains no toxic chemicals, such as nitrite and hydrozybenzene, which are harmful for human body or the environment, is friendly to the environment, and is high in efficiency.