Silicon Dioxide
Silicon
Hafnium
Dielectric Spectroscopy
A technique of measuring the dielectric properties of materials, which vary over a range of frequencies depending on the physical properties of the material. The technique involves measuring, over a range of frequencies, ELECTRICAL IMPEDANCE and phase shift of an electric field as it passes through the material.
Nanomedicine
The branch of medicine concerned with the application of NANOTECHNOLOGY to the prevention and treatment of disease. It involves the monitoring, repair, construction, and control of human biological systems at the molecular level, using engineered nanodevices and NANOSTRUCTURES. (From Freitas Jr., Nanomedicine, vol 1, 1999).
Nanoparticles
Carbon Dioxide
Carbon Compounds, Inorganic
Nitrogen Dioxide
Nitrogen oxide (NO2). A highly poisonous gas. Exposure produces inflammation of lungs that may only cause slight pain or pass unnoticed, but resulting edema several days later may cause death. (From Merck, 11th ed) It is a major atmospheric pollutant that is able to absorb UV light that does not reach the earth's surface.
Nanowires
Sulfur Dioxide
Semiconductors
Personal exposure to dust, endotoxin and crystalline silica in California agriculture. (1/2325)
AIMS: The aim of this study was to measure personal exposure to dust, endotoxin and crystalline silica during various agricultural operations in California over a period of one year. METHODS: Ten farms were randomly selected in Yolo and Solano counties and workers were invited to wear personal sampling equipment to measure inhalable and respirable dust levels during various operations. The samples were analysed for endotoxin using the Limulus Amebocyte Lysate assay and crystalline silica content using X-ray diffraction. In total 142 inhalable samples and 144 respirable samples were collected. RESULTS: The measurements showed considerable difference in exposure levels between various operations, in particular for the inhalable fraction of the dust and the endotoxin. Machine harvesting of tree crops (Geometric mean (GM) = 45.1 mg/m3) and vegetables (GM = 7.9 mg/m3), and cleaning of poultry houses (GM = 6.7 mg/m3) showed the highest inhalable dust levels. Cleaning of poultry houses also showed the highest inhalable endotoxin levels (GM = 1861 EU/m3). Respirable dust levels were generally low, except for machine harvesting of tree crops (GM = 2.8 mg/m3) and vegetables (GM = 0.9 mg/m3). Respirable endotoxin levels were also low. For the inhalable dust fraction, levels were reduced considerably when an enclosed cabin was present. The percentage of crystalline silica was overall higher in the respirable dust samples than the inhalable dust samples. CONCLUSIONS: Considerable differences exist in personal exposure levels to dust, endotoxin and crystalline silica during various agricultural operations in California agriculture with some operations showing very high levels. (+info)Purification and characterization of rat hippocampal CA3-dendritic spines associated with mossy fiber terminals. (2/2325)
We report a revised and improved isolation procedure for CA3-dendritic spines, most of them still in association with mossy fiber terminals resulting in a 7.5-fold enrichment over nuclei and a 29-fold enrichment over myelin. Additionally, red blood cells, medullated fibers, mitochondria and small synaptosomes were significantly depleted. We show by high resolution electron microscopy that this subcellular fraction contains numerous dendritic spines with a rich ultrastructure, e.g. an intact spine apparatus, membranous organelles, free and membrane-bound polyribosomes, endocytic structures and mitochondria. This improved experimental system will allow us to study aspects of post-synaptic functions at the biochemical and molecular level. (+info)Silica dust and lung cancer in the German stone, quarrying, and ceramics industries: results of a case-control study. (3/2325)
BACKGROUND: A work force based case-control study of lung cancer was performed in non-silicotic subjects exposed to crystalline silica to investigate the association between silica dust and lung cancer excluding the influence of silicosis. METHODS: Two hundred and forty seven patients with lung cancer and 795 control subjects were enrolled, all of whom had been employed in the German stone, quarrying, or ceramics industries. Smoking was used as a matching criterion. Exposure to silica was quantified by measurements, if available, or otherwise by industrial hygienists. Several indices (peak, average and cumulative exposure) were used to analyse the relationship between the level of exposure and risk of lung cancer as odds ratios (OR). RESULTS: The risk of lung cancer is associated with the year of and age at first exposure to silica, duration of exposure, and latency. All odds ratios were adjusted for these factors. Considering the peak exposure, the OR for workers exposed to high levels (>/=0.15 mg/m3 respirable silica dust which is the current occupational threshold value for Germany) compared with those exposed to low levels (<0.15 mg/m3) was 0.85 (95% CI 0.58 to 1. 25). For the time weighted average exposure the OR was 0.91 (95% CI 0.57 to 1.46). The OR for the cumulative exposure was 1.02 (95% CI 0. 67 to 1.55). No increase in risk was evident with increasing exposure. CONCLUSIONS: This study shows no association between exposure to crystalline silica and lung cancer. The exclusion of subjects with silicosis may have led to dilution with respect to the level of exposure and therefore reduced the power to detect a small risk. Alternatively, the risk of getting lung cancer may be restricted to subjects with silicosis and is not directly linked to silica dust. (+info)Biochemical evolution III: polymerization on organophilic silica-rich surfaces, crystal-chemical modeling, formation of first cells, and geological clues. (4/2325)
Catalysis at organophilic silica-rich surfaces of zeolites and feldspars might generate replicating biopolymers from simple chemicals supplied by meteorites, volcanic gases, and other geological sources. Crystal-chemical modeling yielded packings for amino acids neatly encapsulated in 10-ring channels of the molecular sieve silicalite-ZSM-5-(mutinaite). Calculation of binding and activation energies for catalytic assembly into polymers is progressing for a chemical composition with one catalytic Al-OH site per 25 neutral Si tetrahedral sites. Internal channel intersections and external terminations provide special stereochemical features suitable for complex organic species. Polymer migration along nano/micrometer channels of ancient weathered feldspars, plus exploitation of phosphorus and various transition metals in entrapped apatite and other microminerals, might have generated complexes of replicating catalytic biomolecules, leading to primitive cellular organisms. The first cell wall might have been an internal mineral surface, from which the cell developed a protective biological cap emerging into a nutrient-rich "soup." Ultimately, the biological cap might have expanded into a complete cell wall, allowing mobility and colonization of energy-rich challenging environments. Electron microscopy of honeycomb channels inside weathered feldspars of the Shap granite (northwest England) has revealed modern bacteria, perhaps indicative of Archean ones. All known early rocks were metamorphosed too highly during geologic time to permit simple survival of large-pore zeolites, honeycombed feldspar, and encapsulated species. Possible microscopic clues to the proposed mineral adsorbents/catalysts are discussed for planning of systematic study of black cherts from weakly metamorphosed Archaean sediments. (+info)Presence of Campylobacter and Salmonella in sand from bathing beaches. (5/2325)
The purpose of this study was to determine the presence of thermophilic Campylobacter spp. and Salmonella spp. in sand from non-EEC standard and EEC standard designated beaches in different locations in the UK and to assess if potentially pathogenic strains were present. Campylobacter spp. were detected in 82/182 (45%) of sand samples and Salmonella spp. in 10/182 (6%). Campylobacter spp. were isolated from 46/92 (50%) of samples from non-EEC standard beaches and 36/90 (40%) from EEC standard beaches. The prevalence of Campylobacter spp. was greater in wet sand from both types of beaches but, surprisingly, more than 30% of samples from dry sand also contained these organisms. The major pathogenic species C. jejuni and C. coli were more prevalent in sand from non-EEC standard beaches. In contrast, C. lari and urease positive thermophilic campylobacters, which are associated with seagulls and other migratory birds, were more prevalent in sand from EEC standard beaches. Campylobacter isolates were further characterized by biotyping and serotyping, which confirmed that strains known to be of types associated with human infections were frequently found in sand on bathing beaches. (+info)Immature germ cell separation using a modified discontinuous Percoll gradient technique in human semen. (6/2325)
The difficulty of identifying immature germ cells in unstained, fresh semen has led most laboratories to use the broad definition 'round cells' to indicate cells other than spermatozoa, thus grouping together both leukocytes and immature germ cells. This is also the case in research andrology, where very little attention has been given to immature germ cells in the semen apart from some rare exceptions, such as the attempts to study meiosis. Here we report on the use of a discontinuous Percoll gradient method modified to enable the best separation possible of immature germ cells from the other cells found in the ejaculate, in order to obtain a cellular suspension free of spermatozoa. Our technique (intra-assay variation in duplicates < 10%) demonstrated a high immature germ cell concentration in gradient fractions with 30% to 45% Percoll with a small contamination (1.5-6%) of leukocytes, confirmed by May-Grunwald-Giemsa staining, immunofluorescence and cytofluorimetry. The concentrations of immature germ cells ranged from zero in obstructive azoospermia to 2.0 x 10(6)/ml in oligozoospermia and genital tract infection. The purified immature germ cell suspensions obtained can be useful for diagnostic and research purposes. (+info)Comparative evaluation of two density gradient preparations for sperm separation for medically assisted conception. (7/2325)
To evaluate and optimize the sperm separation efficiency of a novel silane-coated silica bead (Puresperm), serial studies were carried out to compare the various sperm parameters between: (i) three-layer (90%-70%-40%) Puresperm and three-layer (90%-70%-40%) conventional polyvinylpyrrolidone (PVP)-coated silica bead (Percoll) gradients; (ii) three-layer (90%-70%-40%) and two-layer (90%-45%) Puresperm gradients and separately the same for Percoll; and (iii) large (3.0 ml) and small (0.75 ml) semen loading volumes on three-layer Puresperm gradients. Normozoospermic semen samples were treated and analysed in 12 replicates for each experiment. Manual evaluation of concentration, percentage motility, percentage vitality, percentage normal morphology; computer-assisted semen analysis evaluation of concentration, percentage motility, grade of motility, motion characteristics (curvilinear velocity, linearity, amplitude of lateral head velocity, beat cross frequency, percentage hyperactivation); and yields from the initial semen samples were compared. Percoll was found to be superior to Puresperm in concentration, percentage motility, percentage vitality and yields after three-layer density gradient centrifugation. There were no significant differences in sperm parameters between two- and three-layer Percoll gradients, but three-layer Puresperm gradients behaved significantly better than two-layer gradients. Large semen volume loads on three-layer Puresperm gradients resulted in greater sperm concentrations, percentage motility, percentage vitality and percentage normal morphology, but small semen volume loads produced greater yields of good-quality spermatozoa. In the light of Percoll being withdrawn from the shelf for the use of assisted reproduction because of the presence of PVP, three-layer Puresperm gradients with large semen loading volumes appear to be an attractive alternative for sperm separation in medically assisted conception. (+info)A post-stishovite SiO2 polymorph in the meteorite Shergotty: implications for impact events. (8/2325)
Transmission electron microscopy and electron diffraction show that the martian meteorite Shergotty, a shocked achondrite, contains a dense orthorhombic SiO2 phase similar to post-stishovite SiO2 with the alpha-PbO2 structure. If an SiO2 mineral exists in Earth's lower mantle, it would probably occur in a post-stishovite SiO2 structure. The presence of such a high-density polymorph in a shocked sample indicates that post-stishovite SiO2 structures may be used as indicators of extreme shock pressures. (+info)Silicon Dioxide, also known as Silica, is a crystalline compound of silicon and oxygen (SiO2) that occurs in various forms in nature, including quartz, sand, and diatomaceous earth, and is widely used in industry for its physical and chemical properties, such as heat resistance and insulation.
Silicon dioxide is not a medical term, but a chemical compound with the formula SiO2. It's commonly known as quartz or sand and is not something that would typically have a medical definition. However, in some cases, silicon dioxide can be used in pharmaceutical preparations as an excipient (an inactive substance that serves as a vehicle or medium for a drug) or as a food additive, often as an anti-caking agent.
In these contexts, it's important to note that silicon dioxide is considered generally recognized as safe (GRAS) by the U.S. Food and Drug Administration (FDA). However, exposure to very high levels of respirable silica dust, such as in certain industrial settings, can increase the risk of lung disease, including silicosis.
Silicon does not have a specific medical definition as it is not a biological or medical term, but in a general context, silicon is a non-biodegradable semiconductor material that is used in the production of various medical devices and implants, such as joint replacements and breast implants, due to its durability and stability.
I'm sorry for any confusion, but "Silicon" does not have a specific medical definition. Silicon is a chemical element with the symbol Si and atomic number 14. It is a metalloid, which means it has properties of both metals and nonmetals. In the human body, silicon is not considered an essential nutrient, although it is found in trace amounts in various tissues. Some research suggests that silicon might play a role in collagen synthesis and bone health, but more studies are needed to confirm these findings and establish recommended intake levels.
Hafnium is a chemical element (symbol Hf, atomic number 72) that is a lustrous, silvery, hard, ductile, and malleable transition metal, which naturally occurs in small quantities in zircon sand and is primarily used in the nuclear industry for its properties as a neutron absorber.
I'm sorry for any confusion, but Hafnium is not a medical term. It is a chemical element with the symbol Hf and atomic number 72. Hafnium is a lustrous, silvery, tetravalent transition metal that chemically resembles zirconium and is found in zirconium minerals.
It has no relevance to medical terminology or healthcare. If you have any questions related to medical definitions or health-related topics, I'd be happy to try to help with those instead!
Dielectric spectroscopy is a non-destructive analytical technique that measures the dielectric properties (permittivity and loss factor) of a material as a function of frequency, providing information about its molecular dynamics, relaxation behavior, and structural characteristics.
Dielectric spectroscopy is a type of material characterization technique that measures the dielectric properties of a material as a function of frequency. The dielectric property of a material refers to its ability to store electrical energy in the form of polarization when an external electric field is applied. In dielectric spectroscopy, the material's response to an alternating electric field is measured, and the resulting complex permittivity (which includes both real and imaginary components) is used to characterize the material's dielectric behavior.
The technique involves applying a small amplitude AC voltage to the material while measuring the current flow through it. The frequency of the applied voltage can be varied over a wide range, typically from millihertz to gigahertz. By analyzing the phase shift and amplitude of the resulting current, the complex permittivity of the material can be determined as a function of frequency.
Dielectric spectroscopy is widely used in materials science, physics, chemistry, and biology to study the structure, dynamics, and composition of various materials, including polymers, ceramics, glasses, colloids, and biological tissues. The technique can provide valuable information about the material's molecular mobility, relaxation processes, conductivity, and other dielectric properties, which can be used for quality control, process monitoring, and fundamental research.
Nanomedicine is a branch of medicine that utilizes nanoscale materials or devices, typically under 100 nanometers in size, for the prevention, diagnosis, and treatment of diseases and injuries to improve patient care.
Nanomedicine is a branch of medicine that utilizes nanotechnology, which deals with materials, devices, or systems at the nanometer scale (typically between 1-100 nm), to prevent and treat diseases. It involves the development of novel therapeutics, diagnostics, and medical devices that can interact with biological systems at the molecular level for improved detection, monitoring, and targeted treatment of various diseases and conditions.
Nanomedicine encompasses several areas, including:
1. Drug delivery: Nanocarriers such as liposomes, polymeric nanoparticles, dendrimers, and inorganic nanoparticles can be used to encapsulate drugs, enhancing their solubility, stability, and targeted delivery to specific cells or tissues, thereby reducing side effects.
2. Diagnostics: Nanoscale biosensors and imaging agents can provide early detection and monitoring of diseases with high sensitivity and specificity, enabling personalized medicine and improved patient outcomes.
3. Regenerative medicine: Nanomaterials can be used to create scaffolds and matrices for tissue engineering, promoting cell growth, differentiation, and vascularization in damaged or diseased tissues.
4. Gene therapy: Nanoparticles can be employed to deliver genetic material such as DNA, RNA, or gene-editing tools (e.g., CRISPR-Cas9) for the targeted correction of genetic disorders or cancer treatment.
5. Medical devices: Nanotechnology can improve the performance and functionality of medical devices by enhancing their biocompatibility, strength, and electrical conductivity, as well as incorporating sensing and drug delivery capabilities.
Overall, nanomedicine holds great promise for addressing unmet medical needs, improving diagnostic accuracy, and developing more effective therapies with reduced side effects. However, it also presents unique challenges related to safety, regulation, and scalability that must be addressed before widespread clinical adoption.
"Silicon compounds are chemical substances formed through the combination of silicon, a naturally occurring metalloid, with various other elements, which can include oxygen, chlorine, fluorine, and carbon, among others, resulting in a diverse range of materials with applications spanning from semiconductors to medical devices."
Silicon compounds refer to chemical substances that contain the element silicon (Si) combined with other elements. Silicon is a Group 14 semimetal in the periodic table, and it often forms compounds through covalent bonding. The most common silicon compound is silicon dioxide (SiO2), also known as silica, which is found in nature as quartz, sand, and other minerals.
Silicon can form compounds with many other elements, including hydrogen, oxygen, halogens, sulfur, nitrogen, and carbon. For example:
* Silanes (SiHn) are a series of silicon-hydrogen compounds where n ranges from 1 to 6.
* Silicones are synthetic polymers made up of alternating silicon and oxygen atoms with organic groups attached to the silicon atoms.
* Silicates are a class of minerals that contain silicon, oxygen, and one or more metal cations. They have a wide range of structures and uses, including as building materials, ceramics, and glass.
* Siloxanes are a group of compounds containing alternating silicon-oxygen bonds with organic groups attached to the silicon atoms.
Silicon compounds have various applications in industry, medicine, and daily life. For instance, silicones are used in medical devices such as breast implants, contact lenses, and catheters due to their biocompatibility and flexibility. Silicates are found in pharmaceuticals, cosmetics, and food additives. Silicon-based materials are also used in dental restorations, bone cement, and drug delivery systems.
Nanoparticles are tiny particles with at least one dimension size ranging from 1 to 100 nanometers, which exhibit unique physicochemical properties and are used in various biomedical applications including drug delivery, diagnostics, and therapeutics.
Nanoparticles are defined in the field of medicine as tiny particles that have at least one dimension between 1 to 100 nanometers (nm). They are increasingly being used in various medical applications such as drug delivery, diagnostics, and therapeutics. Due to their small size, nanoparticles can penetrate cells, tissues, and organs more efficiently than larger particles, making them ideal for targeted drug delivery and imaging.
Nanoparticles can be made from a variety of materials including metals, polymers, lipids, and dendrimers. The physical and chemical properties of nanoparticles, such as size, shape, charge, and surface chemistry, can greatly affect their behavior in biological systems and their potential medical applications.
It is important to note that the use of nanoparticles in medicine is still a relatively new field, and there are ongoing studies to better understand their safety and efficacy.
Carbon Dioxide (CO2): A colorless, odorless gas naturally occurring in the Earth's atmosphere, produced by organisms during respiration and by decomposition of organic materials; also a byproduct of fossil fuel combustion, contributing to the greenhouse effect and climate change.
Carbon dioxide (CO2) is a colorless, odorless gas that is naturally present in the Earth's atmosphere. It is a normal byproduct of cellular respiration in humans, animals, and plants, and is also produced through the combustion of fossil fuels such as coal, oil, and natural gas.
In medical terms, carbon dioxide is often used as a respiratory stimulant and to maintain the pH balance of blood. It is also used during certain medical procedures, such as laparoscopic surgery, to insufflate (inflate) the abdominal cavity and create a working space for the surgeon.
Elevated levels of carbon dioxide in the body can lead to respiratory acidosis, a condition characterized by an increased concentration of carbon dioxide in the blood and a decrease in pH. This can occur in conditions such as chronic obstructive pulmonary disease (COPD), asthma, or other lung diseases that impair breathing and gas exchange. Symptoms of respiratory acidosis may include shortness of breath, confusion, headache, and in severe cases, coma or death.
Inorganic carbon compounds are chemical combinations that do not contain hydrocarbon groups and include simple oxides, salts, and carbides of carbon, primarily formed with non-carbon elements such as oxygen, sulfur, or metal atoms.
Carbon inorganic compounds are chemical substances that contain carbon combined with one or more elements other than hydrogen. These compounds include oxides of carbon such as carbon monoxide (CO) and carbon dioxide (CO2), metal carbides like calcium carbide (CaC2) and silicon carbide (SiC), and carbonates like calcium carbonate (CaCO3) and sodium carbonate (Na2CO3).
Unlike organic compounds, which are based on carbon-hydrogen bonds, inorganic carbon compounds do not contain hydrocarbon structures. Instead, they feature carbon bonded to elements such as nitrogen, oxygen, sulfur, or halogens. Inorganic carbon compounds have diverse physical and chemical properties and play important roles in various industrial applications, as well as in biological systems.
Nitrogen Dioxide is an air pollutant with the chemical formula NO2, which is primarily produced from the burning of fossil fuels and can have harmful effects on human health, including respiratory issues and increased risk of asthma attacks.
Nitrogen dioxide (NO2) is a gaseous air pollutant and respiratory irritant. It is a reddish-brown toxic gas with a pungent, choking odor. NO2 is a major component of smog and is produced from the combustion of fossil fuels in vehicles, power plants, and industrial processes.
Exposure to nitrogen dioxide can cause respiratory symptoms such as coughing, wheezing, and difficulty breathing, especially in people with asthma or other respiratory conditions. Long-term exposure has been linked to the development of chronic lung diseases, including bronchitis and emphysema. NO2 also contributes to the formation of fine particulate matter (PM2.5), which can penetrate deep into the lungs and cause additional health problems.
Nanowires are elongated nanostructures with a diameter of 1-100 nanometers and an aspect ratio of at least 1,000, which exhibit unique electrical, mechanical, and optical properties, making them promising materials for various biomedical applications such as biosensors, drug delivery systems, and neural interfaces.
I'm sorry for any confusion, but "nanowires" is not a medical term. It is a term used in the field of materials science and nanotechnology. Nanowires are one-dimensional structures with a diameter of 1-100 nanometers (nm) and an aspect ratio (length/diameter) greater than 1000. They have unique electrical, mechanical, and optical properties that make them useful in various applications such as electronics, sensors, energy storage, and biomedical devices.
Sulfur Dioxide is a colorless gas with the chemical formula SO2, which at lower concentrations has a sharp and irritating smell, and is primarily produced as a byproduct during the combustion of fossil fuels or the smelting of mineral ores.
Sulfur dioxide (SO2) is not a medical term per se, but it's an important chemical compound with implications in human health and medicine. Here's a brief definition:
Sulfur dioxide (SO2) is a colorless gas with a sharp, pungent odor. It is primarily released into the atmosphere as a result of human activities such as the burning of fossil fuels (like coal and oil) and the smelting of metals. SO2 is also produced naturally during volcanic eruptions and some biological processes.
In medical terms, exposure to high levels of sulfur dioxide can have adverse health effects, particularly for people with respiratory conditions like asthma or chronic obstructive pulmonary disease (COPD). SO2 can irritate the eyes, nose, throat, and lungs, causing coughing, wheezing, shortness of breath, and a tight feeling in the chest. Prolonged exposure to elevated levels of SO2 may exacerbate existing respiratory issues and lead to decreased lung function.
Regulations are in place to limit sulfur dioxide emissions from industrial sources to protect public health and reduce air pollution.
Medically, semiconductors are not defined as they are primarily associated with the field of electronics and materials science, where they refer to materials, such as silicon or germanium, that have electrical conductivity between that of a conductor and an insulator, allowing for their use in various electronic devices including medical equipment.
I'm sorry for any confusion, but "semiconductors" is a term from the field of materials science and electronics rather than medicine. Semiconductors are materials, often silicon-based, that have properties between conductors and insulators. They are used in various electronic devices due to their unique property of controlling the flow of electrical current. If you have any medical questions, I'd be happy to help with those instead!
Organosilicon compounds are defined as synthetic or natural substances that contain at least one organic group (carbon and hydrogen) bonded to a silicon atom, which can be found in various applications, including pharmaceuticals, agrochemicals, and materials science.
Organosilicon compounds are a class of chemical compounds that contain at least one organic group (a group of atoms composed mainly of carbon and hydrogen) bonded to a silicon atom. The organic group can be an alkyl group, aryl group, or any other group that is derived from a hydrocarbon.
The term "organosilicon" is used to describe the covalent bond between carbon and silicon atoms, which is a type of bond known as a "sigma bond." This bond is formed by the overlap of atomic orbitals between the carbon and silicon atoms. The resulting organosilicon compound can have a wide range of physical and chemical properties, depending on the nature of the organic group and the number of such groups attached to the silicon atom.
Organosilicon compounds are widely used in various industries, including electronics, coatings, adhesives, and pharmaceuticals. They are also used as intermediates in the synthesis of other chemical compounds. Some common examples of organosilicon compounds include silicones, which are polymers that contain repeating units of siloxane (Si-O-Si) bonds, and organofunctional silanes, which are used as coupling agents to improve the adhesion of materials to surfaces.
Nanotechnology is a branch of engineering and science that involves manipulating matter on an atomic or molecular scale, typically between 1 to 100 nanometers, to create materials, devices, or systems with unique properties and functions.
Nanotechnology is not a medical term per se, but it is a field of study with potential applications in medicine. According to the National Nanotechnology Initiative, nanotechnology is defined as "the understanding and control of matter at the nanoscale, at dimensions between approximately 1 and 100 nanometers, where unique phenomena enable novel applications."
In the context of medicine, nanotechnology has the potential to revolutionize the way we diagnose, treat, and prevent diseases. Nanomedicine involves the use of nanoscale materials, devices, or systems for medical applications. These can include drug delivery systems that target specific cells or tissues, diagnostic tools that detect biomarkers at the molecular level, and tissue engineering strategies that promote regeneration and repair.
While nanotechnology holds great promise for medicine, it is still a relatively new field with many challenges to overcome, including issues related to safety, regulation, and scalability.
Silicon dioxide
... could be grown on a silicon semiconductor surface. Silicon oxide layers could protect silicon surfaces during ... HF is used to remove or pattern silicon dioxide in the semiconductor industry. Silicon dioxide acts as a Lux-Flood acid, being ... Silicon dioxide has been researched for agricultural applications as a potential insecticide. Silicon dioxide is mostly ... Colloidal silicon dioxide Dicalite DRI-DIE Insecticide 67 FLO-GARD Fossil flour Fumed silica Fumed silicon dioxide HI-SEL LO- ...
Aluminium phosphate
... silicon dioxide. Berlinite looks like quartz and has a structure that is similar to quartz with silicon replaced by Al and P. ... and this mirrors the behaviour of silicon dioxide. There are many types of aluminium phosphate molecular sieves, generically ...
Flat-panel display
The Silicon Engine. Computer History Museum. Retrieved 29 July 2019. Atalla, M.; Kahng, D. (1960). "Silicon-silicon dioxide ...
Diode memory
The devices have been dubbed "one diode-one resistor" (1D-1R). One implementation uses a silicon dioxide chip. As in most ... Orphaned articles from December 2013, All orphaned articles, Types of RAM, Silicon dioxide, Diodes). ... When electricity passes through a layer of silicon oxide, it strips away oxygen molecules and creates a channel of pure ... metallic-phase silicon less than five nanometers wide. The diodes eliminate the crosstalk inherent in crossbar structures by ...
Xianju National Park
Its silicon dioxide content is over 66%. The park has 101 major geological relics and 24 water views. In the geomorphic ...
List of semiconductor scale examples
p. 4. ISBN 0-471-33372-7. Atalla, Mohamed M.; Kahng, Dawon (June 1960). "Silicon-silicon dioxide field induced surface devices ... The i1103 was manufactured on a 6-mask silicon-gate P-MOS process with 8 μm minimum features. The resulting product had a 2,400 ... "IBM claims world's smallest silicon transistor - TheINQUIRER". Theinquirer.net. 2002-12-09. Archived from the original on May ... "Observation of electron velocity overshoot in sub-100-nm-channel MOSFET's in Silicon". IEEE Electron Device Letters. 6 (12): ...
MOSFET
Derick accidentally grew a layer of silicon dioxide over the silicon wafer. Further research showed that silicon dioxide could ... Silicon dioxide has traditionally been used as the gate insulator. Silicon dioxide however has a modest dielectric constant. ... Atalla, M.; Kahng, D. (1960). "Silicon-silicon dioxide field induced surface devices". IRE-AIEE Solid State Device Research ... traditionally of silicon dioxide and later of silicon oxynitride. Some companies use a high-κ dielectric and metal gate ...
Organic field-effect transistor
The Silicon Engine. Computer History Museum. Atalla, M.; Kahng, D. (1960). "Silicon-silicon dioxide field induced surface ... Thermally oxidized silicon is a traditional substrate for OFETs where the silicon dioxide serves as the gate insulator. The ... This pentacene oxidation technique is akin to the silicon oxidation used in the silicon electronics. Polycrystalline ... The performance of OFETs, which can compete with that of amorphous silicon (a-Si) TFTs with field-effect mobilities of 0.5-1 ...
Television set
Atalla, M.; Kahng, D. (1960). "Silicon-silicon dioxide field induced surface devices". IRE-AIEE Solid State Device Research ... "1960 - Metal Oxide Semiconductor (MOS) Transistor Demonstrated". The Silicon Engine. Computer History Museum. Retrieved 29 July ...
Sickle-gloss
Silicon dioxide, History of agriculture, Natufian culture). ...
Nano-FTIR
Zhang LM (2012-01-01). "Near-field spectroscopy of silicon dioxide thin films". Physical Review B. 85 (7): 075419. arXiv: ...
Silica fume
... polymorph of silicon dioxide, silica. It is an ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy ... Wikimedia Commons has media related to Silicon dioxide. Silica Fume Association (Articles with short description, Short ... Early research used an expensive additive called fumed silica, an amorphous form of silica made by combustion of silicon ... With the implementation of tougher environmental laws during the mid-1970s, silicon smelters began to collect the silica fume ...
Period (periodic table)
Silicon dioxide is the principal constituent of sand. As Carbon is to Biology, Silicon is to Geology. Phosphorus (P) is a ... Silicon (Si) is a metalloid. It is a semiconductor, making it the principal component in many integrated circuits. ...
Silica (disambiguation)
Silica or silicon dioxide is a chemical compound. Silica may also refer to: Silica gel, a desiccant Silica, Rožňava District, ...
List of mines in Japan
"Kaso Mine, Kanuma City, Tochigi, Japan". Kaso Mine (Manganese, Silicon Dioxide) - Imai, Genichiro, Tochigi. 1947. "Oukura mine ...
Simeticone
Simethicone is a mixture of dimethicone and silicon dioxide. The INN name is "simeticone", which was added to the INN ... Silicon, Silicon dioxide, Digestive system, Silicones). ...
Siloxane
Oxidation of organosilicon compounds, including siloxanes, gives silicon dioxide. This conversion is illustrated by the ... Polysiloxanes (silicones), upon combustion in an inert atmosphere, generally undergo pyrolysis to form silicon oxycarbide or ... "The inertness of silicones toward warmblooded animals has been demonstrated in a number of tests." With an LD50 in rats of >50 ... The main route to siloxane functional group is by hydrolysis of silicon chlorides: 2 R3Si−Cl + H2O → R3Si−O−SiR3 + 2 HCl The ...
Uturuncu
Silification is the replacement of rock by silicon dioxide. A diapir is a rock formation, which owing to having a lower density ... The summit fumaroles have temperatures of less than 80 °C (176 °F). Their gases contain large quantities of carbon dioxide, ... water and larger amounts of hydrogen sulfide than sulfur dioxide perhaps due to the latter being filtered out by a hydrothermal ...
Silicatein
... a silicon dioxide polymer. These inorganic structures provide support for the animals. Silica deposition begins intracellularly ... Silicateins are enzymes which catalyse the formation of biosilica from monomeric silicon compounds (such as silicic acid) ... and mechanistic catalysts for the polycondensation reactions of silicon-compounds. The Venus' flower basket siliceous sponge is ... https://doi.org/10.1073/pnas.95.11.6234 Bullis, Kevin (1 November 2006). "Silicon and Sun". MIT Technology Review. Retrieved 6 ...
Alvin Van Valkenburg
"Infrared studies on polymorphs of silicon dioxide and germanium dioxide". Journal of Research of the National Bureau of ...
Vapor etching
Commonly, hydrogen fluoride and xenon difluorides are used to etch silicon dioxide and silicon sacrificial layers respectively ... J. Holmes, P.J Snell (1966). "A vapour etching technique for the photolithography of silicon dioxide". Microelectronics and ... 2 XeF2 (abs) + Si (s) → 2 Xe (g) + 2 F (abs) + Si (s) The fluorine bonds with the surface silicon to form silicon tetra ... After the etchant has been mass transported to the silicon surface, the xenon difluoride is absorbed on the silicon surface. 2 ...
Silicalite
It is one of several forms (polymorphs) of silicon dioxide. It is a white solid. It consists of tetrahedral silicon centers and ... Unlike conventional polymorphs of titanium dioxide, the Ti centers in titanium silicalite have tetrahedral coordination ...
Gate dielectric
The earliest gate dielectric used in a field-effect transistor was silicon dioxide (SiO2). The silicon and silicon dioxide ... For silicon-substrate FETs, the gate dielectric is almost always silicon dioxide (called "gate oxide"), since thermal oxide has ... Silicon dioxide remains the standard gate dielectric in MOSFET technology. QBD (electronics) Kooi†, E.; Schmitz, A. (2005). " ...
The Disappearing Spoon
Silicon dioxide can be fatal and carbon dioxide is not. Moving forward in this chapter Kean starts to describe Germanium and ... Next, Kean describes silicon. In general, he states that they are cousins because silicon mimics carbon in the sense that it ... The big issue that silicon encounters is that silicon does not have the life-sustaining abilities like carbon to attach to ... Unfortunately for Germanium, silicon provided a much better use for electronics and was used when men were sent to the moon and ...
Local oxidation nanolithography
Subsequently, a pattern of silicon dioxide is defined by LON. The SMM molecules are predominantly deposited on the oxide ... first observed by Dagata and co-workers in 1990 who locally modified a hydrogen-terminated silicon surface into silicon dioxide ... LON also allows to fabricate Silicon Nanowires (SiNWs) in a top-down fashion starting from silicon on insulator (SOI) wafers. ... this technique is compatible with the standard silicon CMOS processing technology. Single crystalline silicon nanowires have ...
Brendel-Bormann oscillator model
"Effect of Nitridation of Silicon Dioxide on Its Infrared Spectrum". Journal of the Electrochemical Society. 131 (3): 637-640. ...
Extreme ultraviolet
... and breakdown in silicon dioxide films on silicon". Journal of Applied Physics. AIP Publishing. 73 (7): 3367-3384. doi:10.1063/ ... EUV radiation can be emitted in silicon dioxide or sapphire. EUV light can also be emitted by free electrons orbiting a ...
Glass
Carefully drawn flawless glass fibres can be produced with strength of up to 11.5 gigapascals (1,670,000 psi). Silicon dioxide ... silicon dioxide, or quartz), the primary constituent of sand. Soda-lime glass, containing around 70% silica, accounts for ... Some of these glasses (e.g. Germanium dioxide (GeO2, Germania), in many respects a structural analogue of silica, fluoride, ...
Carbon dioxide (data page)
"Carbon dioxide absorption spectroscopy with a mid-infrared silicon photonic waveguide". Optics Letters. 45 (1): 109. arXiv: ... "Carbon dioxide í™”í•™ê³µí•™ì†Œìž¬ì—°êµ¬ì •ë³´ì„¼í„°(CHERIC) , ì—°êµ¬ì •ë³´ , KDB , Pure Component Properties". www.cheric.org. Giauque, W. F.; Egan, C. J. ( ... MSDS for solid carbon dioxide is available from Pacific Dry Ice, inc. ‡Second column of table indicates solubility at each ... Because nitrogen and oxygen are symmetrical and carbon dioxide and water vapor are not, the air in an infrared ...
Slag
... is mainly a mixture of metal oxides and silicon dioxide. Broadly, it can be classified as ferrous (by-products of ... Slag is usually a mixture of metal oxides and silicon dioxide. However, slags can contain metal sulfides and elemental metals. ... In some smelting processes, such as ilmenite smelting to produce titanium dioxide, the slag can be the valuable product. During ... During the process of smelting iron, ferrous slag is created, but dominated by calcium and silicon compositions. Through this ...
Silicon dioxide - Wikipedia
Silicon dioxide could be grown on a silicon semiconductor surface. Silicon oxide layers could protect silicon surfaces during ... HF is used to remove or pattern silicon dioxide in the semiconductor industry. Silicon dioxide acts as a Lux-Flood acid, being ... Silicon dioxide has been researched for agricultural applications as a potential insecticide. Silicon dioxide is mostly ... Colloidal silicon dioxide Dicalite DRI-DIE Insecticide 67 FLO-GARD Fossil flour Fumed silica Fumed silicon dioxide HI-SEL LO- ...
Silicon dioxide Definition & Meaning | Dictionary.com
silicon dioxide. in a sentence. *. Were carbon, and our waste is carbon dioxide, and this thing is silicon, and its waste is ... As stated in the discussion of fluorine, it is formed when hydrofluoric acid acts upon silicon dioxide or a silicate. ... With his Sco drill he might have pierced that silicon dioxide armor till he reached the creatures gritty flesh. ... In this respect it differs from silicon dioxide, which will not combine directly with water. ...
Can you make silicon dioxide
The pure form of silicon has an atomic structure that makes it highly effective as a semiconductor. This means it has the ... Silicon dioxide is mostly obtained by mining, including sand mining and purification of quartz. Quartz is suitable for many ... conductive properties of metal and is an insulator so that silicon can conduct and block electricity. Th ... Silicon dioxide is widely used as an anticaking agent in flour-based baking mixes. Silicon dioxide, also known as synthetic ...
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Tripoli R-30 - Silicon Dioxide [SiO2] Pharmaceutical Grade Powder
INTERBAND OPTICAL TRANSITION STRENGTHS IN SILICON DIOXIDE, GERMANIUM DIOXIDE, STANNIC OXIDE AND TITANIUM DIOXIDE. - Nokia Bell...
Nanoparticle concerns prompt Prinova new silicon dioxide-free infant nutrition premixes
Ingredient manufacturer Prinova has developed a full range of silicon dioxide-free infant nutrition premixes, which it says are ... Nanoparticle concerns lead to Prinova silicon dioxide-free infant nutrition premixes. By Jim Cornall 04-Jun-2020. - Last ... Silicon dioxide nanoparticles are commonly used in infant nutrition premixes as anticaking agents for fat-soluble forms of ... The company said that other clinical studies, by Liu et al in 2017, and Fu et al in 2018, suggest silicon dioxide nanoparticles ...
Global Silicon Dioxide (SiO2) Market to Grow at a CAGR of ~7% during 2022-2031; Market to Expand on the Back of Natural...
Market to Expand on the Back of Natural Availability of Silicon Dioxide and Growing Adoption in Construction ... Global Silicon Dioxide (SiO2) Market to Grow at a CAGR of ~7% during 2022-2031; ... Global Silicon Dioxide (SiO2) Market: Regional Overview. The global silicon dioxide (SiO2) market is segmented into five major ... Global Silicon Dioxide (SiO2) Market Size:. The global silicon dioxide (SiO2) market catered an approximate revenue figure of ...
Reactive Ion Etch (RIE) of Silicon Dioxide (SiO2) with Tetrafluoromethane (CF4)
Silicon dioxide Cruise,industry,technology,materials,energy conser
What material is Silicon dioxide. Whats Silicon dioxide? You can find the silicon dioxide Crystal: The silicon atom can be ... high hydroxyl web content externally.Regarding Nano Silicon Dioxide Whats Silicon dioxide? You can find the silicon dioxide ... High Purity Silicon Dioxide SiO2 powder CAS 7631-86-9, 99.9%. Silicon dioxide is also called silica. Its an oxide of silicon ... What is silicon dioxide used for?. Silicon dioxide is the most abundant mineral in the earths crust. It is found on all ...
A combined quantum chemistry and computational fluid dynamics study of silicon dioxide and NOx production in exhaust gas from...
Ultrasensitive electrochemical biosensing platform based on spherical silicon dioxide/molybdenum selenide nanohybrids and...
Ultrasensitive electrochemical biosensing platform based on spherical silicon dioxide/molybdenum selenide nanohybrids and ... Silicon. 14 Si 28.085500000 Silicon See more Silicon products. Silicon (atomic symbol: Si, atomic number: 14) is a Block P, ... Silica (or silicon dioxide), as sand, is a principal ingredient of glass, one of the most inexpensive of materials with ... The silicon atom has a radius of 111 pm and a Van der Waals radius of 210 pm. Silicon was discovered and first isolated by Jöns ...
Unraveling the Mysteries of Silicon Dioxide: Safety and Everything You Should Know - SECEC.org
In this article, we will be unraveling the mysteries surrounding silicon dioxide, exploring its safety considerations, current ... IntroductionSilicon dioxide is a compound that has gained significant attention in recent years. As a versatile substance, it ... Industrial Uses of Silicon Dioxide. Industrial Uses of Silicon Dioxide:. Silicon dioxide, also known as silica, has a wide ... What is Silicon Dioxide?. Silicon dioxide, also known as silica, is a compound composed of silicon and oxygen. It is one of the ...
Silicon Dioxide SiO2 powder Robot,Robot Tech,Robot Industry,Environment,Low Ca
High Purity Silicon Dioxide SiO2 powder CAS 7631-86-9, 99.9%. Silicon dioxide is also called silica. Its an oxide of silicon ... Silicon dioxide is also called silica. Its an oxide of silicon and has the chemical composition SiO2. Silica, which includes ... Silicon Dioxide SiO2 powder_Robot,Robot Tech,Robot Industry,Environment,Low Ca ... silica found in quartz and quartz sand, is collectively called silica.Particle Sizes: 10-30nm Purity: 99.5-99.9% Silicon D ...
Metal oxide particles containing titanium oxide coated with silicon dioxide-tin(iv) oxide complex oxide - Patent EP-2724984-B1 ...
Silicon dioxide with liquid reagent | Lovibond
Silicon Dioxide Archives - SiMPore
Green synthesis of silicon dioxide nanoparticles and L arginine@silicon dioxide nano- composites using cellulose of Zizyphus...
Green synthesis of silicon dioxide nanoparticles and L arginine@silicon dioxide nano- composites using cellulose of Zizyphus ... The recent research focused on the green synthesis of silicon dioxide nanoparticles, SiO2@Cellulose of Zizyphus Spina-Christi ... KEY WORDS: Green synthesis, Cellulose of Zizyphus Spina-Christi, Silicon dioxide nanoparticles, COVID-19, Biological activity ... Green synthesis Cellulose of Zizyphus Spina-Christi Silicon dioxide nanoparticles COVID-19 Biological activity ...
Development of Hydrogen and Hydroxyl Contamination in Thin Silicon Dioxide Thermal Films.
It is shown that, during the oxidation period required to grow a 100-nm thick silicon dioxide film on a 100 silicon wafer in ... The most significant reactions occurring the water-silica-silicon system during wafer oxidation at temperatures in the range ... The use of polycrystalline silicon oxidation tubes is discussed with reference to the inherent water gettering action of ... thermally grown on silicon in dry oxygen atmospheres contained in resistance-heated fused silica or polycrystalline silicon ...
Density functional theory study on the fluorination reactions of silicon and silicon dioxide surfaces using different fluorine...
Silicon Dioxide | Colorado PROFILES
"Silicon Dioxide" by people in this website by year, and whether "Silicon Dioxide" was a major or minor topic of these ... "Silicon Dioxide" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH (Medical Subject ... Below are the most recent publications written about "Silicon Dioxide" by people in Profiles. ... Below are MeSH descriptors whose meaning is more general than "Silicon Dioxide". ...
Activated Silicon Dioxide Powder - Nanorh
Activated Silicon Dioxide Powder , Buy ultra-High-Purity Nanomaterials , Worldwide Shipping , Fast Delivery FedEx, DHL, TNT ... Silicon dioxide, also known as silica, silicic acid or any type of silicic acid, is a silicon oxide with the chemical formula ... Activated Silicon Dioxide Powder (SiO2). The main application of silica nanoparticles is as an additive for the production of ... The absorption of amorphous silicon dioxide, in high doses, leads to non-permanent inflammation in the short term, where all ...
What is Colloidal Silicon Dioxide?
Its a form of fine silicon, which is easily dispersed. It can be insoluble in water. Silicon is a naturally occurring element ... For what purpose is colloidal silicone dioxide used? Food usage. Colloidal silica can be found in foods. Because it acts as a ... What exactly is colloidal silica dioxide? A gaseous silica obtained by hydrolysis. ... Does silicon dioxide have any health benefits? It naturally occurs in the earth, and also in human bodies. Silicon dioxide is ...
Properties of Silicon Dioxide - Science Struck
In this article, we shall look into the physical and chemical properties of silicon dioxide, and learn a little about its ... Silicon dioxide or silica, as it is commonly known as, is an important constituent of sand. However, it is found in several ... The image above, shows the structure of silicon dioxide. Silicon dioxide is formed when silicon is exposed to the oxygen in the ... Uses of Silicon Dioxide. One of the most common uses is silicon dioxide in food, where it is used as an additive. Following are ...
Silicon dioxide - NCC - National Chemical Company
Copyright 2023 © The National Chemical Company Ltd. is registered in Ireland with company number 29597 with a registered office at NCC House, 42 Lower Leeson Street, Dublin 2. Natchemco UK Ltd. is registered in UK, with company number No.5452260 with a registered office at Suite1, The Studio, St Nicholas Close, Elstree, Herts WD6 3 EW, UK. In the UK, Natchemco UK is the registered business name of the National Chemical Company. All rights reserved ...
Nano Silicon Dioxide: Shaping Sustainable Crop Management - RapidUpdates
Silicon dioxide nanoparticles can form a defensive film on plant surfaces, effectively protecting against germs and pests. They ... Nano silicon dioxide can serve as conducting fillers, dielectric fillers, and semiconductors in electronic devices. Its small ... Silicon dioxide nanoparticles contribute to enhancing plant growth and improving photosynthesis efficiency. This is credited to ... In the biomedical sector, nano-silicon dioxide is notable for its non-hazardous nature. It can function as drug carriers, ...
Silicon/Silicon dioxide wafer: 4' Diameter, P-type
... silicon dioxide wafer Provides optimal visibility of graphene flakes Specifications: Diameter: 100 mm (4) Oxide Thickness: 285 ... Silicon/ silicon dioxide wafer. Provides optimal visibility of graphene flakes. Specifications:. * Diameter: 100 mm (4") ... Silicon/Silicon dioxide wafer: 4" Diameter, P-type. Graphene SupermarketSKU: W-P-300-1P ...
Nano Silicon Dioxide Nanoparticles: Nurturing Healthy Crops - MindfulMatters
Silicon dioxide nanoparticles can form a defensive film on plant surfaces, effectively shielding against germs and pests. They ... Nano silicon dioxide can serve as conducting fillers, dielectric fillers, and semiconductors in electronic devices. Its effects ... Silicon dioxide nanoparticles contribute to boosting plant growth and improving photosynthesis effectiveness. This is due to ... Nano-silicon dioxide nanoparticles contribute to reducing the need for chemical fertilizers and pesticides, thus reducing ...
New Era No. 12 Silica (Silicon Dioxide) 240 Tablets
Silicon Dioxide. Contains triturated (finely ground) tiny particles of cell salt in easy to take, dissolve on the tongue ... 12 Silica (Silicon Dioxide) 240 Tablets New Era single cell salt number 12 contains SILICA, ... New Era single cell salt number 12 contains SILICA, Silicon Dioxide. Contains triturated (finely ground) tiny particles of cell ...
Silicon Dioxide: The Shocking Truth About this Food Additive
What is silicon dioxide and why are we consuming it regularly? Is it harmful, is it toxic, can you avoid it and will it do harm ... Silicon dioxide. Wait, what? What is silicon dioxide, and why is it in your seasonings? Is silicon dioxide harmful, and should ... What is Silicon Dioxide Used For?. The most common use of silicon dioxide in your food is as an anti-clumping agent. Its added ... What is Silicon Dioxide?. In a word, silicon dioxide is quartz. Its the second most abundant naturally occurring substance on ...
The Fascinating World of Silicon Dioxide Nanoparticles Research - ThoughtfulTales
Silicon dioxide nanoparticles play a role in enhancing plant growth and improving photosynthesis efficiency. This is due to ... Silicon dioxide nanoparticles can create a resistant film on plant surfaces, effectively protecting against germs and pests. ... The Fascinating World of Silicon Dioxide Nanoparticles Research. Posted on August 10, 2023. by Ryder ... Nano silicon dioxide can serve as conductive fillers, dielectric fillers, and semiconductors in electronic devices. Its effects ...
SiO2Colloidal silicon dioxideNanoparticlesPowderInsoluble in waterAmorphous silicon dioxideChemicalWaferNanoOxygenQuartzCarbonGaseousEarth's crustCrystallineFood additivesSyntheticInsulatorParticlesPurityWidelyMoleculePolycrystalline siliconSiliconeDopantsCommonlyOxide of siliconMolecularHydroxylAerosilCrystalTablets2021NaturallyDurabilityPRODUCTSSupplementsTetrahedralIngredientPropertiesFine siliconAtomicResearch
SiO219
- Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO2, commonly found in nature as quartz. (wikipedia.org)
- Thus, SiO2 forms 3-dimensional network solids in which each silicon atom is covalently bonded in a tetrahedral manner to 4 oxygen atoms. (wikipedia.org)
- The dimeric silicon dioxide, (SiO2)2 has been obtained by reacting O2 with matrix isolated dimeric silicon monoxide, (Si2O2). (wikipedia.org)
- The global silicon dioxide (SiO2) market catered an approximate revenue figure of USD 8.35 billion in the year 2021 and is estimated to grow at a CAGR of ~7% over the forecast period, i.e., 2022 - 2031. (tmcnet.com)
- The growth of the market can be ascribed to the natural availability of silicon dioxide (SiO2), along with its remarkable properties such as anti-caking and high-temperature stability. (tmcnet.com)
- Furthermore, the rising demand for silicon dioxide (SiO2) in the construction industry and electronic industry are considered to positively influence the market growth. (tmcnet.com)
- Silicon dioxide (SiO2), also referred as silica, is a natural compound that consists of two materials procured from the earth's crust, i.e., silicon (Si) and oxygen (O2). (tmcnet.com)
- Silicon dioxide (SiO2) is a translucent, shapeless solid, with no fragrance. (tmcnet.com)
- Silicon dioxide (SiO2) is used in the construction of industry as a building material, microelectronics, fiber optics, and solar panels. (tmcnet.com)
- Hence, backed by the wide usage of silicon dioxide, and increasing production of it around the world, the global silicon dioxide (SiO2) market is estimated to be propelled significantly. (tmcnet.com)
- Owing to the rapid expansion of healthcare sector across the globe, the global silicon dioxide (SiO2) market is anticipated to experience a significant growth over the projection period. (tmcnet.com)
- Nano Silicon Dioxide Powder SiO2 Nanoparticles is white powder with great chemical stability. (iberocruceros.com)
- It's an oxide of silicon and has the chemical composition SiO2. (iberocruceros.com)
- An ultrasensitive sandwich-type electrochemical biosensor for DNA detection is developed based on spherical silicon dioxide/molybdenum selenide (SiO2@MoSe2) and graphene oxide-gold nanoparticles (GO-AuNPs) hybrids as carrier triggered Hybridization Chain Reaction (HCR) coupling with multi-signal amplification. (americanelements.com)
- Silicon dioxide, also known as silica, silicic acid or any type of silicic acid, is a silicon oxide with the chemical formula SiO2, which is most commonly found in nature such as quartz and in various living organisms. (nanorh.com)
- The primary constituent of SiO2 powder is elemental silicon, known for its exceptional chemical stability and resilience in the face of high temperatures, strong acids, potent alkalis, and other harsh environments. (spinupgames.com)
- precipitated silica,silicon dioxide,fumed silica，sio2 made in China Precipitated Silica/ Hydrated Silica/ SiO2 Precipitated silica is widely used in rubber, silicone rubber, cosmetics, paint, adhesive area. (silicafumesupplier.com)
- Foliar spray of silicon dioxide (SiO2 NPs), zinc oxide (ZnO NPs) and titanium dioxide (TiO2 NPs) nanoparticles were used for the management of Meloidogyne incognita, Alternaria dauci and Rhizoctonia solani disease complex of carrot . (bvsalud.org)
- Silica is another name for the chemical compound composed of silicon and oxygen with the chemical formula SiO2, or silicon dioxide. (cdc.gov)
Colloidal silicon dioxide2
- What is colloidal silicon dioxide?Colloidal silica is a gaseous silica prepared by hydrolysis of silica compounds. (iberocruceros.com)
- What is Colloidal Silicon Dioxide? (iberocruceros.com)
Nanoparticles12
- Ingredient manufacturer Prinova has developed a full range of silicon dioxide-free infant nutrition premixes, which it says are a response to growing concerns about the potential health impact of nanoparticles. (dairyreporter.com)
- Silicon dioxide nanoparticles are commonly used in infant nutrition premixes as anticaking agents for fat-soluble forms of vitamins. (dairyreporter.com)
- 2017) has indicated silicon dioxide nanoparticles could have numerous health consequences, with studies suggesting infants may be particularly susceptible. (dairyreporter.com)
- The company said that other clinical studies, by Liu et al in 2017, and Fu et al in 2018, suggest silicon dioxide nanoparticles could induce severe pathological consequences in the developing brain. (dairyreporter.com)
- In addition, the company offers vitamin E (50%), vitamin D3 (100) and vitamin K1 (5%) without silicon dioxide, ensuring they are entirely free from any nanoparticles. (dairyreporter.com)
- Studies have raised concerns about silicon dioxide nanoparticles' effect on health, with infants feared to be especially vulnerable. (dairyreporter.com)
- Prinova has published a white paper, 'A serious concern: Silicon dioxide nanoparticles in infant nutrition premixes' ​, to highlight the range of potential risks associated with their use. (dairyreporter.com)
- The recent research focused on the green synthesis of silicon dioxide nanoparticles, SiO 2 @Cellulose of Zizyphus Spina-Christi nanocomposites, and L-Arginine@SiO 2 @Cellulose of Zizyphus Spina-Christi nanocomposites using cellulose of Zizyphus Spina-Christi as a new green polymeric surfactant. (ajol.info)
- The primary element of silica nanoparticles is elemental silicon, renowned for its remarkable substance stability and durability in the presence of high temperatures, strong acids, potent alkalis, and other severe environments. (libriz.net)
- The audience will know about the characterization of nanoparticles that may present in silicon dioxide food additives. (worldnanotechnologyconference.com)
- Effects of silicon dioxide, zinc oxide and titanium dioxide nanoparticles on Meloidogyne incognita, Alternaria dauci and Rhizoctonia solani disease complex of carrot. (bvsalud.org)
- Without the necessity of ad-hoc assumptions used earlier, our simulations show that, due to adhesion with the oxide, the nanoparticles can grow in aspect ratio while in the molten state even after silicon dioxide solidifies. (lu.se)
Powder7
- As obtained by chemical processes silicon dioxide is an amorphous white powder. (dictionary.com)
- The sample you submitted is amorphous silicon dioxide in fine white powder form and contains approximately 6% bound water by weight. (faqs.org)
- In its pure form, silicon dioxide exists as a white, odorless, and tasteless powder. (secec.org)
- In supplements, silicon dioxide is often found as an inactive ingredient in the form of a fine powder or gel. (secec.org)
- The primary element of nano-silica powder is elemental silicon, known for its notable chemical stability and resilience against high temperatures, strong acids, potent alkalis, and other challenging environments. (redarmystudies.net)
- The main component of nano-silica powder is elemental silicon, famous for its remarkable substance stability and resilience in the face of high temperatures, strong acids, potent alkalis, and other severe environments. (edomyzbali.com)
- 2014 best quality silica fumed pure silicon dioxide : The silicon dioxide used in toothpaste is the powder without fixed model. (silicafumesupplier.com)
Insoluble in water1
- Silicon dioxide is insoluble in water and in all organic solvents. (sciencestruck.com)
Amorphous silicon dioxide1
- The absorption of amorphous silicon dioxide, in high doses, leads to non-permanent inflammation in the short term, where all effects are cured. (nanorh.com)
Chemical4
- We will also uncover the safety considerations associated with silicon dioxide, such as its natural occurrence, different forms, chemical reactions, and potential health effects. (secec.org)
- In this article, we shall look into the physical and chemical properties of silicon dioxide, and learn a little about its molecular structure. (sciencestruck.com)
- Here we shall learn about the molecular structure, physical properties, chemical properties, and uses of silicon dioxide. (sciencestruck.com)
- 2014 Best Quality Silica Fumed Pure Silicon Dioxide , Find Complete Details about 2014 Best Quality Silica Fumed Pure Silicon Dioxide,Pure Silicon Dioxide,Pure Silicon Dioxide,Pure Silicon Dioxide from Oxide Supplier or Manufacturer-Zhengzhou Sino Chemical Co., Ltd. (silicafumesupplier.com)
Wafer6
- The mechanisms leading to incorporation of these impurities in the film are discussed in terms of trace water and hydrocarbon contamination in the oxygen used, room ambient humidity permeation through the fused silica tube, the silicon wafer preparation prior to oxidation, and other environment factors. (dtic.mil)
- The most significant reactions occurring the water-silica-silicon system during wafer oxidation at temperatures in the range from 800 C to 1200 C are discussed. (dtic.mil)
- It is shown that, during the oxidation period required to grow a 100-nm thick silicon dioxide film on a 100 silicon wafer in nominally dry oxygen containing water contamination in the ppm range, the introduction of hydrogen and hydroxyl contamination into the oxide film can be explained in terms of the water-silica interaction. (dtic.mil)
- Silicon/Silicon dioxide wafer: 4" Dia. (graphene-supermarket.com)
- In 1955 Carl Frosch and L. Derick accidentally grew a layer of silicon dioxide over the silicon wafer. (wikipedia.org)
- Further research showed that silicon dioxide could prevent dopants from diffusing into the silicon wafer. (wikipedia.org)
Nano5
- It has the attributes of small bit dimension, several micropores, large certain surface, high hydroxyl web content externally.Regarding Nano Silicon Dioxide What's Silicon dioxide? (iberocruceros.com)
- Nano silicon dioxide can serve as conducting fillers, dielectric fillers, and semiconductors in electronic devices. (libriz.net)
- In the biomedical sector, nano-silicon dioxide is notable for its non-hazardous nature. (libriz.net)
- In this work, dynamic light scattering was used to measure particle size distribution, electron microscopy for imaging and single-particle inductively coupled mass spectrometry (sp-ICP-MS) to measure the concentration of nano-sized materials present in silicon dioxide additives. (worldnanotechnologyconference.com)
- These results allow the USFDA to gain a greater understanding of the nano-sized particle occurrence in commercial food-grade silicon dioxide intended for use as food additives. (worldnanotechnologyconference.com)
Oxygen17
- In the majority of silicon dioxides, the silicon atom shows tetrahedral coordination, with four oxygen atoms surrounding a central Si atom (see 3-D Unit Cell). (wikipedia.org)
- It has been produced by combining silicon monoxide (SiO) with oxygen in an argon matrix. (wikipedia.org)
- In dimeric silicon dioxide there are two oxygen atoms bridging between the silicon atoms with an Si-O-Si angle of 94° and bond length of 164.6 pm and the terminal Si-O bond length is 150.2 pm. (wikipedia.org)
- The oxygen atoms located at the vert Silicon dioxide is also called silica. (iberocruceros.com)
- Silicon makes up 25.7% of the earth's crust, by weight, and is the second most abundant element, exceeded only by oxygen. (americanelements.com)
- Silicon dioxide, also known as silica, is a compound composed of silicon and oxygen. (secec.org)
- Hydrogen and hydroxyl incorporation into thin silicon dioxide films thermally grown on silicon in dry oxygen atmospheres contained in resistance-heated fused silica or polycrystalline silicon tubes is analyzed. (dtic.mil)
- Silicon dioxide is formed when silicon is exposed to the oxygen in the atmosphere. (sciencestruck.com)
- If you look at the atomic model of silicon dioxide, you'll see that the four oxygen atoms (shown in blue) are located far apart from the silicon atom at the center (shown in green), with the molecule forming a tetrahedral structure (as shown by the thin black lines). (sciencestruck.com)
- The "bridge" formed by the oxygen atoms, between the silicon atoms of adjacent tetrahedrons, is responsible for some of the unique properties of silicon dioxide. (sciencestruck.com)
- You might be wondering why the molecular formula of silicon dioxide is SiO 2 when the structure shows four atoms of oxygen surrounding each silicon atom. (sciencestruck.com)
- The strong silicon-oxygen covalent bonds get broken at very high temperatures, close to 1700 o C. Also, silicon dioxide is very hard and rigid, and this is again due to the strong covalent bond between silicon and oxygen. (sciencestruck.com)
- Silicon Dioxide is a natural compound of silicon and oxygen found mostly in sand, Silica has three main crystalline varieties: quartz, tridymite, and cristobalite. (silicafumesupplier.com)
- We are counted among the most prestigious manufacturers, suppliers and traders of best quality Aerosil - 200 Fumed silica.Aerosil is pure silicon dioxide, made from vaporized silicon tetrachloride oxidized in high-temperature flame with hydrogen and oxygen. (silicafumesupplier.com)
- Aerosil is pure silicon dioxide, made from vaporized silicon tetrachloride oxidized in high-temperature flame with hydrogen and oxygen. (silicafumesupplier.com)
- c-Silica compounds have structures with repeating patterns of silicon and oxygen. (cdc.gov)
- All forms of silica are odorless solids composed of silicon and oxygen atoms. (cdc.gov)
Quartz9
- Silicon dioxide is mostly obtained by mining, including sand mining and purification of quartz. (mis-asia.com)
- Silica, which includes silica found in quartz and quartz sand, is collectively called silica.Particle Sizes: 10-30nm Purity: 99.5-99.9% Silicon D Silicon dioxide is the most abundant mineral in the earth's crust. (iberocruceros.com)
- In addition to quartz, there are many other crystalline forms of silicon dioxide found in nature, under different temperature and pressure conditions. (sciencestruck.com)
- In a word, silicon dioxide is quartz. (my-greek-food.com)
- It may sound strange to hear that silicon dioxide is quartz, yet it's found in plants. (my-greek-food.com)
- This paper describes an experimental investigation of the tensile properties of quartz-silicon dioxide particulate reinforced LM6 aluminium alloy composite. (upm.edu.my)
- In this experimental, quartz-silicon dioxide particulate reinforced LM6 composite were fabricated by carbon dioxide sand moulding process with variation of the particulate content on percentage of weight. (upm.edu.my)
- Silica, or more correctly silicon dioxide SiO 2, is one of the most abundant compounds on the surface of the Earth, being most obvious as quartz and common sand. (silicafumesupplier.com)
- The two silicon dioxide polymorphs, quartz and cristobalite, are known to have different toxicities. (nih.gov)
Carbon4
- The starkly different structures of the dioxides of carbon and silicon are a manifestation of the double bond rule. (wikipedia.org)
- We're carbon, and our waste is carbon dioxide, and this thing is silicon, and its waste is silicon dioxide -silica. (dictionary.com)
- Pure silicon is produced by heating silicon dioxide with carbon at temperatures approaching 2200°C. Silicon can get quite pure, and even different isotopes can get quite pure. (mis-asia.com)
- Hence, this study reports the results of molecular dynamics (MD) simulations carried out to explore the interaction behavior of several single-walled carbon nanotube (SWCNTs) of varying diameter on a silicon dioxide (SiO 2 ) surface. (edu.hk)
Gaseous1
- In gaseous state, the structure of silicon dioxide forms linear O=Si=O molecules. (sciencestruck.com)
Earth's crust2
- Silicon dioxide is the most abundant mineral in the earth's crust. (iberocruceros.com)
- It is the most abundant compound of silicon found on the earth's crust, and one of the most commonly found oxides. (sciencestruck.com)
Crystalline2
- Based on the crystal structural differences, silicon dioxide can be divided into two categories: crystalline and non-crystalline (amorphous). (wikipedia.org)
- Silicon dioxide is found in nature in mainly two forms: crystalline and amorphous. (sciencestruck.com)
Food additives3
- Furthermore, we will explore the common applications of silicon dioxide, including its use as food additives, its role in supplements and pharmaceuticals, as well as its industrial uses.Through this comprehensive exploration, we aim to provide you with a solid understanding of silicon dioxide, its safety considerations, and its various applications. (secec.org)
- Silicon dioxide is also used as a carrier for flavors and other food additives, enhancing their dispersibility and stability. (secec.org)
- Therefore, we conducted multi analytical techniques to characterize the particle size distribution of six commercially available silicon dioxide food additives. (worldnanotechnologyconference.com)
Synthetic3
- Silicon dioxide, also known as synthetic amorphous silica (SAS), is used by food manufacturers as an anticaking agent in spices or creamers to ensure fine-flowing powders or to absorb water. (mis-asia.com)
- Silicon dioxide, also known as synthetic amorphous silica (SAS), is widely used in food products as a thickener, anticaking agent, and carrier for fragrances and flavors. (mis-asia.com)
- Silicon Dioxide: Synthetic silica gel. (faqs.org)
Insulator2
- This means it has the conductive properties of metal and is an insulator so that silicon can conduct and block electricity. (mis-asia.com)
- Due to the absence of free electrons within the molecular structure, silicon dioxide is a very bad conductor of electricity, and acts as an insulator. (sciencestruck.com)
Particles1
- During production, there is a possibility of the occurrence of nanosized silicon dioxide particles, however, there are limited data concerning the particle size distributions of food-grade silicon dioxide. (worldnanotechnologyconference.com)
Purity1
- Ultra high purity silicon can be doped with boron , gallium , phosphorus, or arsenic to produce silicon for use in transistors, solar cells , rectifiers, and other solid-state devices which are used extensively in the electronics industry .The name Silicon originates from the Latin word silex which means flint or hard stone. (americanelements.com)
Widely3
- Silicon dioxide is widely used as an anticaking agent in flour-based baking mixes. (mis-asia.com)
- In addition to this, silicon dioxide is used widely in healthcare sector to make health supplements. (tmcnet.com)
- Due to its unique properties, silicon dioxide is widely used in a range of industries, including food and supplements, pharmaceuticals, and industrial manufacturing. (secec.org)
Molecule1
- The tetrahedral shape is responsible for the rigidity of the silicon dioxide molecule. (sciencestruck.com)
Polycrystalline silicon2
- The use of polycrystalline silicon oxidation tubes is discussed with reference to the inherent water gettering action of silicon at oxidation temperatures. (dtic.mil)
- The "metal" in the name MOSFET is sometimes a misnomer , because the gate material can be a layer of polysilicon (polycrystalline silicon). (wikipedia.org)
Silicone1
- For what purpose is colloidal silicone dioxide used? (lempotee.fr)
Dopants1
- Moreover, the nature of silicon towards protection against diffusion of dopants, i.e., a process used for controlling impurities into a material to change its electrical, optical or structural properties, is also expected to add in to the market growth in the coming years. (tmcnet.com)
Commonly2
- Silicon dioxide or silica, as it is commonly known as, is an important constituent of sand. (sciencestruck.com)
- The metal-oxide-semiconductor field-effect transistor ( MOSFET , MOS-FET , or MOS FET ) is a type of field-effect transistor (FET), most commonly fabricated by the controlled oxidation of silicon . (wikipedia.org)
Oxide of silicon1
- In order to get a better understanding of its many properties, it is important that we have a basic idea about the molecular structure of this oxide of silicon. (sciencestruck.com)
Molecular3
- Here are some facts about the molecular structure of silicon dioxide. (sciencestruck.com)
- TRDN-2 molecular sieve is a silicon aluminate crystal product with developed three-dimensional pore structure, as well as the pore diameter of the crystal is 0.9 nm. (actionext.com)
- TRDN-2 molecular screen is a silicon aluminate crystal material with established three-dimensional pore structure, and also the pore diameter of the crystal is 0.9 nm. (actionext.com)
Hydroxyl1
- Development of Hydrogen and Hydroxyl Contamination in Thin Silicon Dioxide Thermal Films. (dtic.mil)
Aerosil1
- Aerosil is the tradename for medical grade colloidal silicon. (lempotee.fr)
Crystal2
- You can find the silicon dioxide Crystal: The silicon atom can be located in the center of the regular trihedron. (iberocruceros.com)
- The metalloid is rarely found in pure crystal form and is usually produced from the iron-silicon alloy ferrosilicon. (americanelements.com)
Tablets1
- Pharmaceutical companies utilize silicon dioxide in the production of tablets and capsules. (secec.org)
20211
- It was noted that global silicon production amounted to an estimated total of approximately 8.7 million metric tons in 2021. (tmcnet.com)
Naturally2
- On the other hand, corn - which belongs to the Family Poaceae - is a rich and economic source of naturally occurring silicon dioxide minerals, with sizes ranging from micrometers to nanometers. (mis-asia.com)
- Silicon is a naturally occurring element on the periodic table. (lempotee.fr)
Durability1
- Additionally, silicon dioxide serves as a reinforcing filler in rubber and plastics, improving their strength and durability. (secec.org)
PRODUCTS3
- See more Silicon products. (americanelements.com)
- Silicon dioxide can also be used as a stabilizer and thickening agent in certain food products. (secec.org)
- In addition to preventing clumping, silicon dioxide also improves the flowability of powdered products. (secec.org)
Supplements6
- In this article, we will be unraveling the mysteries surrounding silicon dioxide, exploring its safety considerations, current research, common applications, and more.In the following sections, we will delve into the significance of silicon dioxide in food and supplements, the latest findings from research studies, and the establishment of safe limits for its usage. (secec.org)
- Silicon dioxide, also known as silica, is a compound that is frequently used in food and supplements for various reasons. (secec.org)
- One of the primary functions of silicon dioxide in food and supplements is to act as an anti-caking agent. (secec.org)
- Another benefit of silicon dioxide is its ability to extend the shelf life of food and supplements. (secec.org)
- Different types of silicon dioxide are added to food, medicines and supplements. (lempotee.fr)
- Silicon dioxide is an additive that's frequently used in seasonings, medicines, supplements and foods like cereals. (my-greek-food.com)
Tetrahedral1
- Due to the tetrahedral structure, the melting point of silicon dioxide is very high. (sciencestruck.com)
Ingredient1
- Silica (or silicon dioxide ), as sand, is a principal ingredient of glass, one of the most inexpensive of materials with excellent mechanical, optical, thermal, and electrical properties. (americanelements.com)
Properties2
- Overall, silicon dioxide plays a vital role in various applications due to its anti-caking, dispersing, stabilizing, and reinforcing properties. (secec.org)
- If these questions have aroused your curiosity, then continue reading for information on the many properties of silicon dioxide, and how these properties make it a useful compound in more ways than one. (sciencestruck.com)
Fine silicon2
- It is a kind of fine silicon that can be uniformly dispersed. (iberocruceros.com)
- It's a form of fine silicon, which is easily dispersed. (lempotee.fr)
Atomic2
- The pure form of silicon has an atomic structure that makes it highly effective as a semiconductor. (mis-asia.com)
- Silicon (atomic symbol: Si, atomic number: 14) is a Block P, Group 14, Period 3 element with an atomic weight of 28.085. (americanelements.com)
Research1
- So let's embark on this journey to shed light on the mysteries of silicon dioxide and equip ourselves with valuable knowledge for informed decision-making and future research endeavors. (secec.org)
