Manufacturers usually produce Foley catheters using silicone or coated natural latex.[citation needed] Coatings include PTFE, ... indwelling urinary catheters are most commonly used to assist people who cannot urinate. Indications for using a catheter ... Indwelling urinary catheters should not be used to monitor stable people who are able to urinate or for the convenience of the ... Indwelling catheters should be avoided when there are alternatives, and when patients and caregivers discuss alternatives to ...

Some people develop allergies or sensitivities to latex after long-term latex catheter use making it necessary to use silicone ... Catheters come in several basic designs: A Foley catheter (indwelling urinary catheter) is retained by means of a balloon at ... The catheter may be a permanent one (indwelling catheter), or an intermittent catheter removed after each catheterization. ... They are commonly made in silicone rubber or natural rubber. An intermittent catheter/Robinson catheter is a flexible catheter ...

Liquid silicone rubbers are supplied in barrels. Because of their low viscosity, these rubbers can be pumped through pipelines and tubes to the vulcanization equipment. The two components are pumped through a static mixer by a metering pump. One of the components contains the catalyst, typically platinum based. A coloring paste as well as other additives can also be added before the material enters the static mixer section. In the static mixer the components are well mixed and are transferred to the cooled metering section of the injection molding machine. The static mixer renders a very homogeneous material that results in products that are not only very consistent throughout the part, but also from part to part. This is in contrast to solid silicone rubber materials that are purchased pre-mixed and partially vulcanized. In contrast, hard silicone rubbers are processed by transfer molding and result in less material consistency and control, leading to ...

... is widely used as a temporary sealant and a lubricant for interconnecting ground glass joints, as is typically used in laboratory glassware. Although silicones are normally assumed to be chemically inert, several historically significant compounds have resulted from unintended reactions with silicones.[3][4] The first salts of crown ethers (OSi(CH3)2)n (n = 6, 7) were produced by reactions of organolithium and organopotassium compounds with silicone greases[5] or the serendipitous reaction of stannanetriol with silicone grease to afford a cage-like compound having three Sn-O-Si-O-Sn linkages in the molecule.[6]. Lubrication of an apparatus with silicone grease may result in the reaction mixture being contaminated with the grease. The impurity may be carried through purification by chromatography in undesirable amounts. In NMR spectroscopy, the methyl groups in polydimethylsiloxane display 1H and 13C chemical shifts ...

... s are primarily used as lubricants, thermic fluid oils or hydraulic fluids. They are excellent electrical insulators[2] and, unlike their carbon analogues, are non-flammable. Their temperature stability and good heat-transfer characteristics make them widely used in laboratories for heating baths ("oil baths") placed on top of hotplate stirrers, as well as in freeze-dryers as refrigerants. Silicone oil is also commonly used as the working fluid in dashpots, wet-type transformers, diffusion pumps and in oil-filled heaters. Aerospace use includes the external coolant loop and radiators of the International Space Station Zvezda module, which rejects heat in the vacuum of space.[3] The class of silicone oils known as cyclosiloxanes has many of the same properties as other non-cyclic siloxane liquids but also has a relatively high volatility, making it useful in a number of cosmetic products such as antiperspirant. Some silicone oils, such as simethicone, are ...

F. S. Kipping and Matt Saunders coined the word silicone in 1901 to describe polydiphenylsiloxane by analogy of its formula, Ph2SiO (Ph stands for phenyl, C6H5), with the formula of the ketone benzophenone, Ph2CO (his term was originally silicoketone). Kipping was well aware that polydiphenylsiloxane is polymeric whereas benzophenone is monomeric and noted that Ph2SiO and Ph2CO had very different chemistry.[2][3] The discovery of the structural differences between Kippings' molecules and the ketones means that silicone is no longer the correct term (though it remains in common usage) and that the term siloxanes is correct according to the nomenclature of modern chemistry.[4]. Silicone is sometimes mistakenly referred to as silicon. The chemical element silicon is a crystalline metalloid widely used in computers and other electronic equipment. Although silicones contain silicon atoms, they also include carbon, hydrogen, oxygen, and perhaps ...

Because silicones are heavily used in biomedical and cosmetic applications, their toxicology has been intensively examined. "The inertness of silicones toward warmblooded animals has been demonstrated in a number of tests." With an LD50 in rats of ,50 g/kg, they are virtually nontoxic.[12] Cyclomethicones are ubiquitous because they are widely used in biomedical and cosmetic applications and can be found at high levels in American cities and can be toxic to aquatic animals in concentrations often found in the environment.[13][14] The cyclomethicones D4 and D5 are bioaccumulative in some aquatic organisms, according to one report.[15] However, Norwegian researcher Nicholas Warner cautioned that findings about bioaccumulation have been largely based on laboratory studies, while field studies of bioaccumulation are still contradicting each other. "Even if the concentrations of siloxanes we have found in fish are high compared to concentrations of classical contaminants like ...

Because silicones are heavily used in biomedical and cosmetic applications, their toxicology has been intensively examined. "The inertness of silicones toward warmblooded animals has been demonstrated in a number of tests." With an LD50 in rats of ,50 g/kg, they are virtually nontoxic.[11] Cyclomethicones are ubiquitous because they are widely used in biomedical and cosmetic applications and can be found at high levels in American cities and can be toxic to aquatic animals in concentrations often found in the environment.[12][13] The cyclomethicones D4 and D5 are bioaccumulative in some aquatic organisms, according to one report.[14] However, Norwegian researcher Nicholas Warner cautioned that findings about bioaccumulation have been largely based on laboratory studies, while field studies of bioaccumulation are still contradicting each other. "Even if the concentrations of siloxanes we have found in fish are high compared to concentrations of classical contaminants like ...

... serves as a universal thickening agent and an anticaking agent (free-flow agent) in powders. Like silica gel, it serves as a desiccant. It is used in cosmetics for its light-diffusing properties. It is used as a light abrasive, in products like toothpaste. Other uses include filler in silicone elastomer and viscosity adjustment in paints, coatings, printing inks, adhesives and unsaturated polyester resins. It is also used in the production of cat litter box filler and as a core material in the production of vacuum insulated panels. ...

The best treatment is prevention in patients with a known predisposition. This includes preventing unnecessary trauma or surgery (including ear piercing, elective mole removal), whenever possible. Any skin problems in predisposed individuals (e.g., acne, infections) should be treated as early as possible to minimize areas of inflammation. Treatment of a keloid scar is age dependent. Radiotherapy, anti-metabolites and corticoids would not be recommended to be used in children, in order to avoid harmful side effects, like growth abnormalities.[9] In adults, corticosteriods combined with 5-FU and PDL in a triple therapy, enhance results and diminish side effects.[9] Further prophylactic and therapeutic strategies include pressure therapy, silicone gel sheeting, intra-lesional triamcinolone acetonide (TAC), cryosurgery, radiation, laser therapy, IFN, 5-FU and surgical excision as well as a multitude of extracts and topical agents.[10] Surgical excision is currently still the most common ...

... is a company based in Gangnam District, Seoul, South Korea. Clio Professional is a professional make up brand since 1993 with the philosophy of "Practical Professional" providing easy-use products but excellent performance. Peripera is a make up brand for young girls since 2005 with fun, pop, trendy images of "Instant Beauty" Goodal is a Korean natural skin care brand since 2011 using fermented ingredients and infused water. Healing bird is a botanical hair and body care brand with silicone free ingredients and various fragrance experiences of flower garden. Clio Cosmetics is a Korean cosmetic company founded in 1993 starting a professional make-up brand "Clio Professional". Over time, the company branched out into other make-up, skin care, hair and body care products. CLIO cosmetics launched Peripera in 2005, Goodal in 2011 and Healing bird in 2017.[better source needed] In 2012, Clio cosmetics opened the stand alone shop Club Clio selling all of its own brands (95 stores as of ...

... are available in many sizes, with individual beads measuring from 25 mm in diameter to 125 mm diameter or larger. Most users enjoy beads of approximately 45 mm, but most will become more adventurous with experience, and try larger sizes. Anal beads are commonly made of silicone, plastic, rubber, latex, glass or metal and end with a ring or similar handle designed for pulling. The purpose of this ring is to prevent the beads from becoming fully lodged in the rectum, and to ease removal. The beads may either be joined flexibly, requiring individual insertion, or by a semi-rigid thin shaft, allowing anal insertion in a single motion. Both arrangements are forms of the sexual art of "beading off". The many nerve endings of the sphincter provide arousal both during insertion and removal, and larger beads may create feelings of pressure while in the rectum. Some anal beads are enhanced with vibration technology to enhance pleasure. ...

The history of competitive swimwear has been dominated by concerns over public nudity in the first half of the 20th century and by efforts to reduce water drag in the second half. Those efforts initially lead swimmers to reduce the early sagging one-piece swimsuits down to briefs only. With the development of new materials that tightly fit the body and offered lower resistance to water than human skin, this trend was reversed to a complete body coverage from heels to neck and wrists. FINA banned full-body suits from competition effective from 1 January 2010, stating that it "wishes to recall the main and core principle is that swimming is a sport essentially based on the physical performance of the athlete". Goggles were used in the crossing of the English Channel back in 1911, but only in 1970 appeared at international competitions. With the advent of rubber technology, latex swimming caps became mass-produced in the 1920s, and more efficient silicone caps appeared in the ...

RNA interference is under study for possible use as a spray-on insecticide by multiple companies, including Monsanto, Syngenta, and Bayer. Such sprays do not modify the genome of the target plant. The RNA could be modified to maintain its effectiveness as target species evolve tolerance to the original. RNA is a relatively fragile molecule that generally degrades within days or weeks of application. Monsanto estimated costs to be on the order of $5/acre.[10]. RNAi has been used to target weeds that tolerate Monsanto's Roundup herbicide. RNAi mixed with a silicone surfactant that let the RNA molecules enter air-exchange holes in the plant's surface that disrupted the gene for tolerance, affecting it long enough to let the herbicide work. This strategy would allow the continued use of glyphosate-based herbicides, but would not per se assist a herbicide rotation strategy that relied on alternating Roundup with others.[10]. They can be made with enough precision to kill some insect species, ...

Výkal je v praktickom zmysle odpad pre daný organizmus, z ktorého je vylúčený. Pre iné organizmy, či už z oblasti rastlinnej alebo živočíšnej ríše, môže takýto odpad znamenať zdroj živín alebo energie. Kravský výkal vzhľadom na špecifickú konzistenciu a vysoký obsah vody je vo voľnej prírode okamžite atakovaný hmyzom, slúži ako zdroj živín a ako miesto pre nakladenie vajíčok hmyzu. Vyliahnuté larvy sa živia rozkladajúcim sa trusom, ktorý ich vďaka hnilobným procesom navyše udržuje v optimálnej teplote. Skarabeus je chrobák, ktorý vyhľadáva trus bylinožravcov. Samička nakladie larvy do guličky z trusu a následne ju zahrabe do zeme. Vyvíjajúca sa larva sa živí trusom. Podobným príkladom môže byť netopierí trus, ktorý v oblasti výskytu netopierej kolónie znamená nevyhnutné živiny pre šváby, chrobáky a iný hmyz.[2] Trus zvierat sa (okrem vyššie zmienených príkladov z prírody) často používa ľudmi ako hnojivo, či už ...