TY - GEN. T1 - Structural properties and photoinduced electron processes in polymer films of poly(3-hexylthiophene-2, 5-diyl) on the surface of silver island films. AU - Zeinidenov, A. K.. AU - Ibrayev, N. Kh. AU - Afanasyev, D. A.. PY - 2016/11/28. Y1 - 2016/11/28. N2 - Influence of surface plasmon resonance of silver island films on photoinduced electronic processes in polymer films of poly(3-hexylthiophene-2,5-diyl) (P3HT) was studied in this work. Fabrication of P3HT on the surface of the plasmon silver island films increases intensity of the absorption and fluorescence of the polymer film about 4 times. The increase in absorption and fluorescence intensity of P3HT is associated with an increase of the rate of absorption transitions in the polymer films through the influence of the local electromagnetic field near the surface of the silver island films. A formation of disordered polymer structures occurs on the surface of the silver island films. This is determined from the ...
The effects of silver nanoparticle on the physical properties of syndiotactic polypropylene (sPP) were investigated in terms of rheological responses and crystallization behavior under shear. Silver nanoparticle played as the nucleating agent of sPP by increasing crystallization temperature (Tc) and heat of crystallization (ΔHc). The introduction of silver nanoparticles more than 1 wt% brought about the rise of dynamic viscosity when compared to pure sPP. sPP with 5 wt% silver nanoparticle exhibited the higher tan δ and lower relaxation time than the others in the low frequency range. However, the effects of silver nanoparticle on the rheological properties became less noticeable when the loading level was higher than 5 wt%.
TY - GEN. T1 - Effect of silver concentration towards formation of agpt nanofern films as sers substrates. AU - Norhayati, Abu Bakar. AU - Nur, Adliha Abdullah. AU - Akrajas, Ali Umar. AU - Mat Salleh, Muhamad. AU - Joseph, George Shapter. PY - 2019/1/1. Y1 - 2019/1/1. N2 - This paper reports the preparation of silver-platinum (AgPt) nanoferns on ITO surface using liquid phase deposition technique with various concentrations of silver nitrate in synthesis solution. The different morphologies of AgPt thin films were grown on the surface using 0.1 mM to 0.8 mM of silver concentration. This silver effect on the growth of AgPt on the surface was studied using FESEM and UV-Vis characterization. It was found that the optimum silver concentration in synthesis solution supplied the appropriate Ag+ ion to grow the nanoferns structure on the surface. AgPt films were then carried out to sense 1.0 M of creatinine concentration to learn their performance as surface-enhanced Raman scattering (SERS) substrate. ...
The myth that colloidal silver can turn your skin a bluish color is absolutely only a myth when taken as prescribed by a doctor. The media created a campaign to frighten viewers from using products containing colloidal silver. The man, Paul Karason, described as the "Blue Man" was attempting to create colloidal silver at home. What he actually created was not truly Colloidal Silver but a high concentrated ionic silver solution. He mixed salt into the solution and used electrolysis, which created a high concentration of silver chloride. Since he believed that he had made a colloidal silver solution he rubbed it on his skin. The solution caused his skin to turn a bluish color. The use of silver solutions began in the late 1800s. It was used as a topical antiseptic. Although, Colloidal Silver is not readily used today among health professionals, there are many states that still require hospitals to use Silver Nitrate to prevent eye infections in newborns. Colloidal Silver must be taken as ...
Article Silver nanoparticle toxicity to Daphnia magna is a function of dissolved silver concentration. The most persistent question regarding the toxicity of silver nanoparticles (AgNPs) is whether this toxicity is due to the nanoparticles themselves...
Silver nanoparticles have been shown to inhibit viruses. However, very little is known about the mechanism of antiviral activity. This study tested the hypothesis that 25-nm silver nanoparticles inhibited Vaccinia virus replication by preventing viral entry. Plaque reduction, confocal microscopy, and beta-galactosidase reporter gene assays were used to examine viral attachment and entry in the presence and absence of silver nanoparticles. To explore the mechanism of inhibition, viral entry experiments were conducted with silver nanoparticles and small interfering RNAs designed to silence the gene coding for p21-activated kinase 1, a key mediator of macropinocytosis. The silver nanoparticles caused a 4- to 5-log reduction in viral titer at concentrations that were not toxic to cells. Virus was capable of adsorbing to cells but could not enter cells in the presence of silver nanoparticles. Virus particles that had adsorbed to cells in the presence of silver nanoparticles were found to be infectious upon
TY - JOUR. T1 - Effects of silver nanoparticles on the interactions of neuron- and glia-like cells. T2 - Toxicity, uptake mechanisms, and lysosomal tracking. AU - Hsiao, I. Lun. AU - Hsieh, Yi Kong. AU - Chuang, Chun Yu. AU - Wang, Chu Fang. AU - Huang, Yuh Jeen. PY - 2017/6/1. Y1 - 2017/6/1. N2 - Silver nanoparticles (AgNPs) are commonly used nanomaterials in consumer products. Previous studies focused on its effects on neurons; however, little is known about their effects and uptake mechanisms on glial cells under normal or activated states. Here, ALT astrocyte-like, BV-2 microglia and differentiated N2a neuroblastoma cells were directly or indirectly exposed to 10 nm AgNPs using mono- and co-culture system. A lipopolysaccharide (LPS) was pretreated to activate glial cells before AgNP treatment for mimicking NP exposure under brain inflammation. From mono-culture, ALT took up the most AgNPs and had the lowest cell viability within three cells. Moreover, AgNPs induced H2O2 and NO from ...
Steve Barwick is a noted natural health journalist with hundreds of published articles to his credit over the past 30 years. He is also the author, co-author or editor of five books on natural health and survivalist topics, and is currently working on five additional books. For the past 13 years he has been an enthusiastic advocate of the responsible use of colloidal silver. He is also a strong proponent of taking personal responsibility for ones own health and well-being, particularly through proper nutrition and natural health. Barwick is also known as the resident colloidal silver advocate at www.TheSilverEdge.com. And he is the featured guest star of the newly released Colloidal Silver Secrets video, now available inexpensively in DVD format at www.ColloidalSilverSecretsVideo.com. His 547-page book, The Ultimate Colloidal Silver Manual, is the worlds bestselling book on colloidal silver and its usage. Learn more at www.UltimateColloidalSilverManual.com. You can also follow Steve on the ...
Silver nanoparticles have been found many interesting applications, such as absorption amplifiers in dye-sensitized solar cells. However, silver nanoparticles are easily oxidized. In order to protect silver nanoparticles, atomic layers of TiO2were deposited onto silver nanoparticles coated to a glass slide. Then the glass slide was exposed to corrosive I-/I3- solutions, and the degree of silver etching was measured via scanning electron microscopy (SEM) and ultraviolet-visible spectroscopy (UVS). It was found that 3 nm (30 cycles) of Al2O3 with 9 nm of (90 cycles) TiO2 could completely protect silver nanoparticles from oxidization ...
Many studies addressing the toxicity of silver nanomaterials have found that smaller sized silver nanoparticles are usually more toxic to organisms and in cell culture than particles of larger sizes yet it is not entirely clear why. We investigated the size dependent toxicity of silver nanoparticles by measuring the response of embryonic zebrafish (Danio rerio) following exposure to a library of thirteen distinct silver nanoparticle size distributions with mean diameters between 8.9 nm and 112.6 nm. Data analysis using dose‐response modeling revealed that silver nanoparticles (AgNP) induced embryo toxicity that is dependent on the total surface area and not on the mass or particle number in solution. Included in this study is a comparison between embryo toxicity induced by silver nitrate (AgNO₃) and AgNPs for cardiovascular endpoints, as well as an investigation into the influence of the chorion on AgNP toxicity. This study demonstrates the importance of using alternative dose metrics in ...
Although colloidal silver has been used for medicinal purposes for many centuries, in recent years it has come back into circulation. The traditionally claimed benefits of colloidal silver can now be tested by modern science. Recently the UCLA School of medicine conducted medical tests on colloidal silver.. The laboratory tests conducted by Larry C. Ford, the M.D of the Department of Obstetrics and Gynecology from UCLA School of Medicine brought to light the ability of colloidal silver to kill viral, fungal and bacterial organisms.. The individual conducted extensive laboratory tests based on the standard anti-microbial test for disinfectants. The results showed colloidal silver to have anti-bacterial properties for 105 organisms per ml of streptococcus pyogenes, Neisseria, Gardnerella Vaginalis, Gonorrhea and various other enteric pathogens.. Thus it was discovered that colloidal silver can actually kill over 650 bacteria, fungi, parasites, molds and fungi that have the potential to sprout ...
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Heres just one example of the real-life testimonials and first-person accounts youll find in Steve Barwicks Real-Life Colloidal Silver Success Stories:. Wards Off Germs and Viruses, Heals Chronic Sinus Infections, Keeps Pets Healthy and Disease-Free, and Much More!. "I use colloidal silver every day. I used to purchase quality colloidal silver at $21 for 4 ounces. At this cost, I wasnt able to experiment with it the way I wanted to. Now I make my own colloidal silver for pennies per quart, and those days are gone because Im able to use it as much and how I want. Here are just a few ways I use colloidal silver!. * Everyday, I take 1-2 tbsp. to ward off any germs or viruses I may come in contact with. I will take more (2-4 ounces at a time, 2-3 times a day) if I feel like something is trying to take hold.. * I have chronic sinus congestion & used to have chronic sinus infections. Now they are few and far between since I started putting colloidal silver into my NeilMed Sinus Rinse Neti Pot, ...
Steve Barwick is a noted natural health journalist with hundreds of published articles to his credit over the past 30 years. He is also the author, co-author or editor of five books on natural health and survivalist topics, and is currently working on five additional books. For the past 13 years he has been an enthusiastic advocate of the responsible use of colloidal silver. He is also a strong proponent of taking personal responsibility for ones own health and well-being, particularly through proper nutrition and natural health. Barwick is also known as the resident colloidal silver advocate at www.TheSilverEdge.com. And he is the featured guest star of the newly released Colloidal Silver Secrets video, now available inexpensively in DVD format at www.ColloidalSilverSecretsVideo.com. His 547-page book, The Ultimate Colloidal Silver Manual, is the worlds bestselling book on colloidal silver and its usage. Learn more at www.UltimateColloidalSilverManual.com. You can also follow Steve on the ...
now has released Curad Silver Bandages for the home use instead of a Band-aid. Curad claims "that silver reduced bacterial growth like Staph. aureaus, E. coli, E. hirae and Pseudomonas aeruginosa".. Samsung Electronics has introduced a refrigerator and new laundry washing machine that uses silver ions to sanitize the laundry and eliminate 99% of odor causing bacteria (sold at Lowes and Best Buy). Plank, a Boston company, has launched a new soap for Yoga users that lists silver as the main active ingredient. The company has a toothpaste and shampoo in R&D that is imbued with silver.. Asia has become the largest consumer of products that uses the nano-silver as a antimicrobial ingredient. Colloidal silver is known to kill virus, is it possible they are guarding against bird flu?. While some agencies strive to prevent you from buying colloidal silver online, the EPA is clear that we NOW have silver in our drinking supply and has, for health purposes established a daily reference dose for silver in ...
Synthesized thiolate boronic acid was found to complex with both a polysaccharide (dextran) and a monosaccharide (glucose) with similar affinities but displayed more affinity with dextran than with glucose when capped as a ligand on silver nanoparticle. Coupling on multiple sites of dextran, the silver particles were aggregated. The aggregated particles displayed a decrease of absorbance at 397 nm and an increase at 640 nm. Luminescence intensity displayed an upward deviation increase with the concentration of dextran. The luminescence spectral change was ascribed to surface-enhanced fluorescence by the enhanced field from the aggregated metallic particles.
The Perkin Elmbver Model 303, equipped with the DCR-1, digital concentration readout, was evaluated as to its ability to provide an index of silver concentration in water solutions, without concentrating in any manner. The procedures, principal settings, and adjustments which must be observed are described. This instrument can detect the difference between concentrations of 10-15 and 10-12 gm/ml. However, as the concentration of silver decreases the experimental error increases to a point at which the error becomes greater than the differences in readout due to differences in silver concentration.
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A novel electrode modified with silver nanoparticles was fabricated. It is found that the reducibility of silver nanoparticles is higher than for bulk silver by comparing a silver nanoparticles modified electrode with a silver micro-disk electrode. When SCN- was added, a new oxidation peak occurred and the anodic peak current of silver nanoparticles decreased. The new anodic peak current is proportional to the thiocyanate concentration in the range of 5.0×10-7~4.0×10-4 mol/L in pH 6.0 NaH2PO4-Na2HPO4 buffer solutions (PBS). The detection limit (S/N=3) is 4×10-8 mol/L. This method has been applied to the determination of saliva (smoker and non-smoker).
A novel electrode modified with silver nanoparticles was fabricated. It is found that the reducibility of silver nanoparticles is higher than for bulk silver by comparing a silver nanoparticles modified electrode with a silver micro-disk electrode. When SCN- was added, a new oxidation peak occurred and the anodic peak current of silver nanoparticles decreased. The new anodic peak current is proportional to the thiocyanate concentration in the range of 5.0×10-7~4.0×10-4 mol/L in pH 6.0 NaH2PO4-Na2HPO4 buffer solutions (PBS). The detection limit (S/N=3) is 4×10-8 mol/L. This method has been applied to the determination of saliva (smoker and non-smoker).
Most colloidal silver items only contain 10% charged silver, but greater brands such as Sovereign Silver includes 98% positively charged silver. Does colloidal silver function? There are a lot of conflicting opinions out there, so its critical to have an understanding of how colloidal silver works. Pseudomonas aeruginosa is a typical bacterium that can lead to illnesses in humans. Research have discovered that up to 12% of silver has been discovered in Pseudomonas aeruginosa. In other words, silver can enter bacterial DNA, and it does so without destroying the hydrogen bonds and it prevents the DNA from unwinding.. Silver attaches to oxygen molecules, and reacts with the sulfhydral (H) groups that surround viruses and bacteria. This is thought to aid block cellular respiration, a life-preserving cellular procedure. Cellular respiration is a series of metabolic processes and reactions in cells which convert energy from nutrients into adenosine triphosphate prior to releasing waste merchandise. ...
... (NHS-Activated Silver Nanoparticles). One-Step mini kit for covalent conjugation of proteins and other amine containing ligands to 20nm silver nanoparticles. Contains enough reagents for conjugation of 3 x 40ug of protein.
... (NHS-Activated Silver Nanoparticles). One-Step MIDI scale-up kit for covalent conjugation of proteins and other amine containing ligands to 20nm silver nanoparticles. Contains enough reagents for conjugation of 400ug of protein.
Synthesis of nanoparticles from various biological systems has been reported, but among all such systems, biosynthesis of nanoparticles from plants is considered the most suitable method. The use of plant material not only makes the process eco-friendly, but also the abundance makes it more economical. The aim of this study was to biologically synthesize silver nanoparticle using Piliostigma thonningii aqueous leaf extract and applied in the purification of laboratory stimulated waste with optimization using the different conditions of silver nanoparticle production such as time, temperature, pH, concentration of silver nitrate and volume of the aqueous extract. The biosynthesized silver nanoparticles were characterized by UV-visible spectrophotometry, nanosizer, energy dispersive x-ray... analysis (EDX), transmission electron microscopy (TEM) and Fourier transform infrared (FTIR) spectroscopy. The time intervals for the reaction with aqueous silver nitrate solution shows an increase in the ...
Article Silver nanoparticle toxicity effect on growth and cellular viability of the aquatic plant Lemna gibba. The toxicity effect of silver nanoparticles (AgNPs) on growth and cellular viability was investigated on the aquatic plant Lemna gibba expo...
A silver halide (or silver salt) is one of the chemical compounds that can form between the element silver and one of the halogens. In particular, bromine, chlorine, iodine and fluorine may each combine with silver to produce silver bromide (AgBr), silver chloride (AgCl), silver iodide (AgI), and three forms of silver fluoride, respectively. As a group, they are often referred to as the silver halides, and are often given the pseudo-chemical notation AgX. Although most silver halides involve silver atoms with oxidation states of +1 (Ag+), silver halides in which the silver atoms have oxidation states of +2 (Ag2+) are known, of which silver(II) fluoride is the only known stable one. Silver halides are light-sensitive chemicals, and are commonly used in photographic film and paper. Silver halides are used in photographic film and photographic paper, including graphic art film and paper, where silver halide crystals in gelatin are coated on to a film base, glass or paper substrate. The gelatin is a ...
Why Bio-Active Silver Hydrosol Over Any Other Form of Silver?. Colloidal Silver has been used for over 115 years in countless applications, and encompasses a wide variety of silver products. Many products contain (claimed or unclaimed) salts, proteins, compounds or stabilizers - all of which affect silvers safety (elimination from the body) and efficacy. Bio-Active Silver Hydrosol represents the ultimate refinement of the colloidal silver category. It contains 98% positively charged silver in pharmaceutical-grade purified water. Nothing else. Our unique silver species, with a verified and unmatched particle size, remains in its most active state for use within the body. Why reach for just any colloidal silver product? Bio-Active Silver Hydrosol offers the safest and most effective concentration. This is why Sovereign Silver is the #1 selling silver brand on the market. Sovereign Silver is manufactured in a GMP Certified Facility. The Path To Safe and Effective Use of Silver. ...
Others may well have heard about it but have no thought what the term basically signifies and how it works. As it turns out, silver colloids are especially useful mixtures which are widely made use of in laboratories all around the planet. The term colloidal silver was coined in the course of the 1990s to describe a mixture containing silver nanoparticles whose silver content totals more than 50% of the mixture. Even so, exactly where lots of businesses have come unstuck is in labelling their items as colloidal silver, devoid of undergoing the detailed and usually pricey laboratory course of action to decide the exact levels of silver in their items. Several companies have advertised silver colloids, when the actual product on the shelves may well be practically nothing of the sort.. So, how can you inform if a item is a correct colloid or not? There are a handful of telltale indicators which show when the silver content of a remedy is significantly less than half. If the colour of a solution is ...
Hello Saregamapa, Silver does indeed possess antibacterial properties. It is used today as coatings on bandages, urinary catheters, heart stents and more, to help prevent surface bacterial growth. Silver nitrate drops were used in newborn?s eyes to prevent infection. Taking colloidal silver by mouth is another matter however, and a questionable practice. There is no legitimate or scientific research proving that taking colloidal silver supplements is beneficial. The US and Australian governments warn against falling for such scams. ?Throughout history, people have exploited the germicidal properties of silver. The Greeks and Romans stored water and other drinks in silver vessels that were believed to keep the liquids fresh. During the plagues in Europe, wealthy families ate from silver plates and used silver utensils, in the hope that silver might protect them from the disease that was claiming their neighbors lives. Pioneers traveling across the U.S. placed silver and copper coins in their ...
The photoinduced growth reaction of silver nanoparticles was accelerated by reduced graphene oxide (RGO) produced from graphene oxide (GO) during the light irradiation process in aqueous solution. X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy demonstrated that RGO was generated in the photoinduced process. The acceleration effect of RGO was investigated through monitoring the extinction spectra of silver nanoparticles during the synthesis process. Moreover, transmission electron microscopy (TEM) was employed to characterize the evolution of morphologies of silver nanoparticles at different irradiation times to demonstrate the effect of RGO. The results indicate that RGO accelerates the photoinduced synthesis of silver nanoparticles. It is proposed that the acceleration effect of RGO on the photoinduced reaction is attributed to the particular property of high electronic conductivity ...
Indian researchers have employed a single-step environmental friendly approach to synthesize silver nanoparticles. According to their report the biomolecules found in plants induce the reduction of Ag+ ions from silver nitrate to silver nanoparticles (AgNPs). The process of reduction is extra cellular and fast leading to the development of easy biosynthesis of silver nanoparticles. Plants during glycolysis produce a large amount of H+ ions along with NAD which acts as a strong redoxing agent which is responsible for the formation of AgNPs. Water-soluble antioxidative agents like ascorbic acids are further responsible for the reduction of AgNPs. These AgNPs produced show good antimicrobial activity against common pathogens ...
Indian researchers have employed a single-step environmental friendly approach to synthesize silver nanoparticles. According to their report the biomolecules found in plants induce the reduction of Ag+ ions from silver nitrate to silver nanoparticles (AgNPs). The process of reduction is extra cellular and fast leading to the development of easy biosynthesis of silver nanoparticles. Plants during glycolysis produce a large amount of H+ ions along with NAD which acts as a strong redoxing agent which is responsible for the formation of AgNPs. Water-soluble antioxidative agents like ascorbic acids are further responsible for the reduction of AgNPs. These AgNPs produced show good antimicrobial activity against common pathogens ...
An efficient bio-catalyzed synthesis of silver nanoparticles from aqueous silver nitrate solution was carried out utilizing the fresh Buchanania axillaris leaves aqueous-n-butanolic extract. The high-density yield silver nanoparticles were characterized by UV-Vis (Ultraviolet-visible), Fourier-transform infra-red (FT-IR), X-ray diffraction (XRD), energy dispersive-absorption X-rays (EDX), size and zeta potential analyses. The spherical morphology was confirmed by the scanning electron microscopy (SEM) of the purified products sample. The UV-Vis absorption λ max was observed at 419 nm while the IR absorption bands showed up at 3435, 2923, 2852, 1629, 1384, 1056, and 616 cm−1 for the capped nanosilver product. The particle sizes ranged approximately between 17-80 nm. The XRD and EDX spectroscopies confirmed the silvers elemental composition. The biosynthesized silver nanoparticles showed significant cytotoxicity at a minimum dose of 10 μg ml−1, and an IC50 value of 31.2 μg ml−1 was ...
It is demonstrated that photoluminescence of DCJTB can be enhanced by surface plasmons occurred in silver nanoparticle arrays on glass substrates fabricated by using nanosphere lithography (NSL) combined with reactive ion etching (RIE). By changing the size of the seed polystyrene nanosphere with fixed thickness of SiO2 film as a buffer layer between silver nanoparticles and fluorescent dye, we systematically studied the interaction between surface plasmons in Ag nanostructures and fluorescent dye by measuring the photoluminescence and time-resolved photoluminescence (TRPL) of the samples. As compared with pure DCJTB, it is observed that PL enhancement as high as 9.4 times and life time shortening from 0.966 ns shortened to 0.63 ns can be achieved with polystyrene nanosphere 430nm in diameter. The physical origin due to plasmonic excitation has been clarified from 3D finite element simulations, as well as the assistance of UV-visible reflectance spectrum.. © 2013 Optical Society of ...
Emergency Alert: Stop EPA From Further Regulating Colloidal Silver as a Pesticide We have only until January 20th to submit comments to the EPA against the proposal by radical environmental groups that want the EPA to immediately begin regulating nanosilver (read: colloidal silver) as a pesticide -- an action that would completely take colloidal silver off the market at some point in time. Apparently, radical environmental groups and fake consumer advocate groups have joined hands to accellerate the ongoing campaign to have the EPA regulate all ...
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Silver nitride is an explosive chemical compound with symbol Ag3N. It is a black, metallic-looking solid which is formed when silver oxide or silver nitrate is dissolved in concentrated solutions of ammonia, causing formation of the diammine silver complex which subsequently breaks down to Ag3N. The standard free energy of the compound is about +315 kJ/mol, making it an endothermic compound which decomposes explosively to metallic silver and nitrogen gas. Silver nitride was formerly referred to as fulminating silver, but this can cause confusion with silver fulminate or silver azide, other compounds which have also been referred to by this name. The fulminate and azide compounds do not form from ammoniacal solutions of Ag2O. Fulminating silver was first prepared in 1788 by the French chemist Claude Louis Berthollet. Silver nitride is poorly soluble in water, but decomposes in mineral acids; decomposition is explosive in concentrated acids. It also slowly decomposes in air at room temperature and ...
Acute and chronic aquatic toxicity data are available for a range of different freshwater and marine species. For silver and silver compounds, the acute ecotoxicity reference value (ERV) is 0.22 µg Ag/L and the chronic ERV is 0.1 µg Ag/L. In line with the risk assessment/classification approach adopted for other metals and inorganic metal compounds (ECHA 2013), ecotoxicity data are reported in terms of the concentration of dissolved silver ions from soluble inorganic silver species. Predominantly, these are studies that used silver nitrate (AgNO3) as the source of dissolved silver ions. Silver nitrate is considered to be the form of silver with the greatest toxicity as it dissociates rapidly and completely in aqueous solution. Where data for silver nitrate was not available, data derived from other inorganic salts (e.g. silver chloride) were used, but only after the exposure conditions were determined to be acceptable (e.g. testing was conducted within the limits of solubility and the Ag+ ion ...
TY - JOUR. T1 - Persistence of silver nanoparticles in the rat lung. T2 - Influence of dose, size, and chemical composition. AU - Anderson, Donald S.. AU - Silva, Rona M.. AU - Lee, Danielle. AU - Edwards, Patricia C.. AU - Sharmah, Arjun. AU - Guo, Ting. AU - Pinkerton, Kent E. AU - Van Winkle, Laura S.. PY - 2015/8/1. Y1 - 2015/8/1. N2 - Increasing silver nanoparticle (AgNP) use in sprays, consumer products, and medical devices has raised concerns about potential health effects. While previous studies have investigated AgNPs, most were limited to a single particle size or surface coating. In this study, we investigated the effect of size, surface coating, and dose on the persistence of silver in the lung following exposure to AgNP. Adult male rats were intratracheally instilled with four different AgNPs: 20 or 110nm in size and coated with either citrate or polyvinylpyrrolidone (PVP) at 0.5 or 1.0mg/kg doses. Silver retention was assessed in the lung at 1, 7, and 21d post exposure. ICP-MS ...
TY - JOUR. T1 - A comparative study of morphology, reactivity and stability of synthesized silver nanoparticles using Bacillus subtilis and Catharanthus roseus (L.) G. Don. AU - Kannan, N.. AU - Mukunthan, K. S.. AU - Balaji, S.. PY - 2011/9/1. Y1 - 2011/9/1. N2 - Large number of papers has been published recently on the eleventh group metallic elements such as Ag, Au and Cu. Our study was focused on biosynthesis of silver nanoparticles, their morphology, reactivity and stability. We were interested to check these properties in two different samples, S1 and S2, respectively. The biosynthesis of silver nanoparticles was achieved by reacting the samples with 1. mM concentration of silver nitrate, one involves bacteria (S1) and the other involves the plant extract (S2). Spectrophotometric analysis revealed that the particles exhibited two peaks, one at 440. nm (for S1) and the other at 390. nm (for S2). It is well known that longer wavelength corresponds to increase in particle size. Since, S1 has ...
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0058] Several adsorption studies have shown the adsorbent dosage to influence the adsorbate removal efficiencies, because it determines the adsorption capacity of adsorbents based on the number of adsorption sites available (Etim, U. J., Umoren S. A., Eduok U. M. (2012). Coconut coir dust as a low cost adsorbent for the removal of cationic dye from aqueous solution, Journal of Saudi Chemical Society--incorporated herein by reference in its entirety). FIG. 5 shows that with the exception of silver nanoparticles doped carbon fly ash, there was no significant variation in the percentage removal of MTBE for all other fly ash based adsorbent materials tested, with change in dosage. Silver oxide impregnated fly ash showed an increase in adsorption with increase in dosage of adsorbent material until a peak dosage was reached, beyond which a slight decrease in adsorption was observed with increase in adsorbent material. A peak reduction of 24% was noted at 50 mg of adsorbent and further increase in ...
In experiments mimicking a natural environment, Duke University researchers have demonstrated that the silver nanoparticles used in many consumer products can have an adverse effect on plants and microorganisms.. Fifty days after scientists applied a single low dose of silver nanoparticles, the experimental environments produced about a third less biomass in some plants and microbes.. These preliminary findings are important, the researchers said, because little is known about the environmental effects of silver nanoparticles, which are found in textiles, clothing, childrens toys and pacifiers, disinfectants and toothpaste.. "No one really knows what the effects of these particles are in the environment," said Benjamin Colman, a post-doctoral fellow in Dukes biology department and a member of the Center for the Environmental Implications of Nanotechnology (CEINT).. "Were trying to come up with the data that can be used to help regulators determine the risks to the environment from silver ...
5) Silver Halide Market (in North America, Europe and Asia) expected to grow at CAGR of XXXX % over the forecast period.. Do Inquiry Before Purchasing Report Here:https://market.biz/report/global-silver-halide-market-2016-asl/45410/#inquiry. At an initial stage, the Silver Halide market report covers the Silver Halide basic information including Silver Halide definitions, Silver Halide market classifications, a wide range of applications and Silver Halide industry chain framework. The Silver Halide Report also covers industry development plans and policies, Silver Halide product specification, Silver Halide manufacturing process and price structures. Then the report focuses on a deep study of global factors influencing the Silver Halide market like market revenue, product cost, Silver Halide market volume, utilization ratio along with Silver Halide market demand and supply analysis.. At a later stage, the report presents, Silver Halide market SWOT Analysis, feasibility study related to Silver ...
Ive been suffering from an ear ache for about 6 months. Ive been to doctors and have been given a different diagnosis by nearly every one. Ive been told it is a hormonal imbalance, TMJ, deep infection, collapsed tubes, sinusitis, etc etc etc. The bottom line is that no one really can get to the bottom of what is bothering my poor ears!. In my frustration, Ive turned to searching for natural remedies. Ive had suggestions ranging from Vitamin C to grapefruit seed extract to sticking a clove a garlic in my ear. But the one suggestion that keeps popping up is Colloidal Silver.. The benefits and risks of taking colloidal silver are difficult to pin down. One side says that it is a miraculous curing agent that has been used for decades. Others say it is a dangerous substance that can cause all manner of problems to your body.. So what is the truth? Ive embarked on a quest to find the answer.. Recommended Reading. Colloidal Silver is a compound that consists of silver particles suspended in ...