Do Natural Enzymes really ERADICATE infestations?
Biocatalyst" redirects here. For the use of natural catalysts in organic chemistry, see Biocatalysis.
Human glyoxalase I. Two zinc ions that are needed for the enzyme to catalyze its reaction are shown as purple spheres, and an enzyme inhibitor called S-hexylglutathione is shown as a space-filling model, filling the two active sites.
Enzymes are proteins that catalyze (i.e., increase or decrease the rates of) chemical reactions.In enzymatic reactions, the molecules at the beginning of the process are called substrates, and they are converted into different molecules, called the products. Almost all processes in a biological cell need enzymes to occur at significant rates. Since enzymes are selective for their substrates and speed up only a few reactions from among many possibilities, the set of enzymes made in a cell determines which metabolic pathways occur in that cell.
Like all catalysts, enzymes work by lowering the activation energy (Ea‡) for a reaction, thus dramatically increasing the rate of the reaction. As a result, products are formed faster and reactions reach their equilibrium state more rapidly. Most enzyme reaction rates are millions of times faster than those of comparable un-catalyzed reactions. As with all catalysts, enzymes are not consumed by the reactions they catalyze, nor do they alter the equilibrium of these reactions. However, enzymes do differ from most other catalysts by being much more specific. Enzymes are known to catalyze about 4,000 biochemical reactions A few RNA molecules called ribozymes also catalyze reactions, with an important example being some parts of the ribosome. Synthetic molecules called artificial enzymes also display enzyme-like catalysis.
Enzyme activity can be affected by other molecules. Inhibitors are molecules that decrease enzyme activity; activators are molecules that increase activity. Many drugs and poisons are enzyme inhibitors. Activity is also affected by temperature, chemical environment (e.g., pH), and the concentration of substrate. Some enzymes are used commercially, for example, in the synthesis of antibiotics. In addition, some household products use enzymes to speed up biochemical reactions (e.g., enzymes in biological washing powders break down protein or fat stains on clothes; enzymes in meat tenderizers break down proteins into smaller molecules, making the meat easier to chew).
A pyrethroid is a synthetic chemical compound similar to the natural chemical pyrethrins produced by the flowers of pyrethrums (Chrysanthemum cinerariaefolium and C. coccineum). Pyrethroids now constitute a major proportion of the synthetic insecticide market and are common in commercial products such as household insecticides. In the concentrations used in such products, they may also have insect repellent properties and are generally harmless to human beings in low doses but can harm sensitive individuals. They are usually broken apart by sunlight and the atmosphere in one or two days, and do not significantly affect groundwater quality.
Pyrethroids are toxic to fish and other aquatic organisms. At extremely small levels, such as 2 parts per trillion, pyrethroids are lethal to mayflies, gadflies, and invertebrates that constitute the base of many aquatic and terrestrial food webs.
Pyrethroids have been found at acutely toxic levels in sediments and waterways in California; the chemical is able to pass through secondary treatment systems at municipal wastewater treatment facilities causing the chemical to be commonly found in the final effluent, usually at levels lethal to invertebrates.
Pyrethroids have become extremely popular for insecticide. The exoskeletons of insects are somewhat porous so pyrethroids are absorbed through contact with a treated surface or with liquid. Most invertebrates succumb due to lack of sufficient enzymes required to break down pyrethroids which rapidly accumulate to toxic levels. Pyrethroids are considered safe because most vertebrates have sufficient enzymes required for rapid breakdown. Toxicity for vertebrates, including humans, occur at extremely high concentrations, but repeated exposure may increase health risks at lower concentration. Anaphylaxis has been reported after pyrethrum exposure, but allergic reaction to pyrethroids has not been documented. Increased sensitivity occurs following repeated exposure to cyanide, which is found in pyrethroids like beta-cyfluthrin (Multiple Chemical Sensitivity Awareness, J. Edward Hill, MD, President & Executive Committee Member, AMA).
The MSDS for pyrethroid products is made available as part of the federal right to know for toxic substances listed with the United States Environmental Protection Agency. License is required for purchase and application of restricted use pesticide in accordance with a product label that indicates restrictions, which is not applicable to retail products used by most consumers. The Clean Air Act (EPA, 42 U.S.C. 7401–7671) establishes mandatory reporting for the discharge of hazardous substances into the environment. Medical conditions like hypersensitivity can increase risk of experiencing angioedema, paresthesia, bronchitis, sinusitis, conjunctivitis, or other symptoms as described on the product MSDS during or after accidental exposure. A poison control center and licensed health care professional should be contacted to discuss the product if symptoms occur following exposure.
Human glyoxalase I. Two zinc ions that are needed for the enzyme to catalyze its reaction are shown as purple spheres, and an enzyme inhibitor called S-hexylglutathione is shown as a space-filling model, filling the two active sites.
Enzymes are proteins that catalyze (i.e., increase or decrease the rates of) chemical reactions.In enzymatic reactions, the molecules at the beginning of the process are called substrates, and they are converted into different molecules, called the products. Almost all processes in a biological cell need enzymes to occur at significant rates. Since enzymes are selective for their substrates and speed up only a few reactions from among many possibilities, the set of enzymes made in a cell determines which metabolic pathways occur in that cell.
Like all catalysts, enzymes work by lowering the activation energy (Ea‡) for a reaction, thus dramatically increasing the rate of the reaction. As a result, products are formed faster and reactions reach their equilibrium state more rapidly. Most enzyme reaction rates are millions of times faster than those of comparable un-catalyzed reactions. As with all catalysts, enzymes are not consumed by the reactions they catalyze, nor do they alter the equilibrium of these reactions. However, enzymes do differ from most other catalysts by being much more specific. Enzymes are known to catalyze about 4,000 biochemical reactions A few RNA molecules called ribozymes also catalyze reactions, with an important example being some parts of the ribosome. Synthetic molecules called artificial enzymes also display enzyme-like catalysis.
Enzyme activity can be affected by other molecules. Inhibitors are molecules that decrease enzyme activity; activators are molecules that increase activity. Many drugs and poisons are enzyme inhibitors. Activity is also affected by temperature, chemical environment (e.g., pH), and the concentration of substrate. Some enzymes are used commercially, for example, in the synthesis of antibiotics. In addition, some household products use enzymes to speed up biochemical reactions (e.g., enzymes in biological washing powders break down protein or fat stains on clothes; enzymes in meat tenderizers break down proteins into smaller molecules, making the meat easier to chew).
Enzyme-based products
Certain protease enzymes can have insecticidal effects. This process works through using naturally occurring enzymes similar to those within the insects themselves. These protease enzymes cause the insect to hatch and molt prematurely, destroying the creature's exoskeleton. These enzymes are similar to those found in meat tenderizers and digestive aids. The benefits of this type of treatment is that the lice do not develop resistance and these products are less toxic.A pyrethroid is a synthetic chemical compound similar to the natural chemical pyrethrins produced by the flowers of pyrethrums (Chrysanthemum cinerariaefolium and C. coccineum). Pyrethroids now constitute a major proportion of the synthetic insecticide market and are common in commercial products such as household insecticides. In the concentrations used in such products, they may also have insect repellent properties and are generally harmless to human beings in low doses but can harm sensitive individuals. They are usually broken apart by sunlight and the atmosphere in one or two days, and do not significantly affect groundwater quality.
Pyrethroids are toxic to fish and other aquatic organisms. At extremely small levels, such as 2 parts per trillion, pyrethroids are lethal to mayflies, gadflies, and invertebrates that constitute the base of many aquatic and terrestrial food webs.
Pyrethroids have been found at acutely toxic levels in sediments and waterways in California; the chemical is able to pass through secondary treatment systems at municipal wastewater treatment facilities causing the chemical to be commonly found in the final effluent, usually at levels lethal to invertebrates.
Environmental effects
A study by Donald P. Weston and Michael J. Lydy have shown pyrethroids in Californian waterways at levels 10 times the lethal dose for aquatic invertebrates such as Hyalella azteca. Their study found that residential water run-off had much more pyrethroid contamination than agricultural run-off. The study also found that pyrethroids are not removed during secondary waste treatment at municipal water treatment plants, often finding pyrethroids in the final effluent.Safety and effectiveness
The perception of a safe and effective range of products has caused the demand for pyrethroid products to increase rapidly.Pyrethroids have become extremely popular for insecticide. The exoskeletons of insects are somewhat porous so pyrethroids are absorbed through contact with a treated surface or with liquid. Most invertebrates succumb due to lack of sufficient enzymes required to break down pyrethroids which rapidly accumulate to toxic levels. Pyrethroids are considered safe because most vertebrates have sufficient enzymes required for rapid breakdown. Toxicity for vertebrates, including humans, occur at extremely high concentrations, but repeated exposure may increase health risks at lower concentration. Anaphylaxis has been reported after pyrethrum exposure, but allergic reaction to pyrethroids has not been documented. Increased sensitivity occurs following repeated exposure to cyanide, which is found in pyrethroids like beta-cyfluthrin (Multiple Chemical Sensitivity Awareness, J. Edward Hill, MD, President & Executive Committee Member, AMA).
The MSDS for pyrethroid products is made available as part of the federal right to know for toxic substances listed with the United States Environmental Protection Agency. License is required for purchase and application of restricted use pesticide in accordance with a product label that indicates restrictions, which is not applicable to retail products used by most consumers. The Clean Air Act (EPA, 42 U.S.C. 7401–7671) establishes mandatory reporting for the discharge of hazardous substances into the environment. Medical conditions like hypersensitivity can increase risk of experiencing angioedema, paresthesia, bronchitis, sinusitis, conjunctivitis, or other symptoms as described on the product MSDS during or after accidental exposure. A poison control center and licensed health care professional should be contacted to discuss the product if symptoms occur following exposure.
