Nanoparticle Essays

The nanotechnology potentially makes the human to rendering to recent and increasing hazards due to some individual properties such as its very small size and high ratio of area to mass. Nanotechnology is the competent invention of materials and systems in nanometer length scale, and exploits the rising properties and phenomenon which have been developed in nano scale. The word “nano” means 10-9, so a nanometer is one-billionth of a meter. One description of nanoscience is the study of atoms, molecules

What is laser therapy and how it is used in the treatment of cancer? The laser therapy uses high intensity light to treat cancer and other diseases. Lasers can be used to reduce or destroy tumors or growths precancerous . Lasers are generally used to treat skin cancers (those that are on the surface of the body or in the lining of organs internally) as skin cancer basal cell and some cancers in stages or stages very early in the disease, as cancers of cervix , penis, vaginal , vulva and small-cell

Tumor treatment by hyperthermia has limitations, however, that the most of nanoparticles do not have high specific absorption rate. At least 10% of tumor weight should be absorbed in order to be effective to heat-ablate tumors through hyperthermia. Treatment of malignant tumors at any site in the body is expected to be possible if agents that convert RF energy into heat can be delivered to the malignant cells. However, RF ablation suffers from the disadvantage that it is an invasive method that often

Synthesis nanoparticles mediated by plant extract is faster, easier and cheaper compared to it mediated by microorganism 19,20,26,27. Various studies have been synthesized magnetite nanoparticles by using an extract of plants resulting magnetite nanoparticles in a variety of shapes and sizes 19,27–30. M. pruriens seed extract has been reported to be used in the biosynthesis of silver and gold nanoparticles which took place rapidly at room temperature and produced stable nanoparticles in the solution

Notably, the particular the size of the nanoparticle is directly correlated to its particle surface area (Ho, Meng et al.,2011). With the reduction in the size of nano zinc oxide, there is an increase in the surface area and this directly impacts the nanotoxicological behavior of the nanoparticle. iv. Concentration-dependent toxicity Various experimental studies have established the concentration-response relationships of zinc oxide nanoparticles. ZnO Nanoparticles pose limited risk to consumers when

negative charge because of to the adsorbed citrate ions; The absorption peak was observed at about 420nm which is the typical characteristic absorption peak for Ag nanoparticles. UV absorption peak of chitosan-Ag nanoparticles was observed by other researchers in the range 410–450

1.1. Herbalism is a traditional medicinal or folk medicine preparation based on the use of plants and plant extracts. Herbalism is also named as botanical medicine, medical herbalism, herbal medicine, herbology, herblore and phytotherapy. The scope of herbal medicine is sometimes extended to comprises fungal and bee products, as well as minerals, shells and certain animal parts. Pharmacology is study of medicines that obtained from natural sources. The plants are the lushest source for drugs traditional

SITE SPECIFIC DRUG DELIVERY Site specific delivery systems are unique forms of delivery systems whereby the drug or medicine is specifically or selectively delivered to a particular site in the body where it is going to exert it's action and it is not delivered to other non-target organs and cells. The main aim of site specific delivery of drugs is to develop drug concentration that is sufficient to produce therapeutic effect at the site of the disease with minimal effect to the rest of the organs

Fe3O4 nanoparticles were synthesized according to our previously reported method by chemical co-precipitation of Fe2+ and Fe3+ ions with a molar ratio of 1:2 [19]. Briefly, 2.4 g of FeCl3.6H2O and 0.8 g of FeCl2.4H2O were dissolved in 30 mL of deionized water under

and reliable method for melamine detection. Out of many detection methods available, use of silver nanoparticles (AgNPs) in detection is a simple and cost effective method. In this paper, the AgNPs are synthesized by three methods: borohydride reduction method, citrate capped nanoparticles and PVP capped nanoparticles and characterized for their shape and structure. It is observed that the nanoparticles synthesized

aspects which have to be taken into account before characterising the nanoparticles are the flatness, spherical nature and the aspect ratio i.e the ratio of the length and the breadth of the particle. Based on the shape of the nanoparticles, they have been given different names like nanospheres, nanoreefs, nanotubules, nanoboxes etc (Choy et al, 2004; Agam et al, 2007; Kralj, 2015;). Based on the aspect ratio, the nanoparticles are classified as high aspect ratio NP(HARN) and low aspect ratio NP(LARN)

Bacteriology[21]. Also, this bacterial isolate was further identified by 16S rRNA sequencing. The culture was maintained on a nutrient agar plate/slants at 4°C and as glycerol stocks 40% at −70°C. Preparation of bacterial supernatant for synthesis of nanoparticles A loopful of the culture was inoculated into 250 ml sterile nutrient broth and incubated at 37°C for 24 hours. The

developing what appears to be the ‘silver lining’ in the issue of tooth decay. Schwass’s envisioned a better approach to treating tooth decay, Meledandri’s expertise in the chemistry of nanoparticles bring that vision to life, giving way to a more promising future for teeth fillings. The pair proposes the concept of nanoparticles of silver (Ag) in miniscule concentrations display properties of more effective anti-bacterial effects relative to the current process of treating tooth decay. Schwass expresses

The Mycophenolate mofetil containing nanoparticle was constantly agitated during the dissolution test, collisions among MNP could first disintegrate the structure of the polymer layer. The subsequent fluidic shear devastated the particulate surfaces and caused the release of a drug. As indicated

Water is the most important component found on the surface of the earth because it is source of life for living creatures. However, water pollution has become a global concern. Water pollution can have several forms from diverse sources. It is expected that there will be a lack of clean water in next few decades due to pollution. Nile river water in Egypt is the focus of attention of many studies due to many reasons. The first reason is because it is water used by over 13 million inhabitants in Cairo

majority of cell membranes have a negative charge, so nanoparticles with a positive charge will have less troubles entering a cell to deliver the chemotherapeutics but it will increase the possibility that they will bind to other cells. Instead scientists usually cover nanoparticles with polyethylene glycol (PEG). PEG is a neutrally charged molecule that reduces cell binding as well as phagocytic uptake and therefore increase the chances of the nanoparticles to reach their specific target. I believe a policy

scalability. Sol-gel process, though, has a few drawbacks such as the need of costly precursor resources and little homogeneity of the finishing product. We report, herein, a cost effective sol-gel method for the gram-scale synthesis of hydroxyapatite nanoparticles using inexpensive starting materials of less toxicity. 5.1.2

After 4 hours, the culture medium was removed and cells were treated with 200 μL of nanoparticles containing an amount of 5 μg of siRNA-TNF-  plus 200 μL of incomplete AMEM medium added without FBS and PS. Cells treated with 200 μL of free siRNA were used as a negative control. After 3 hours of incubation at 37 °C, the medium was removed and

Synthesis of nanoparticles 1mM aqueous, and ethanol solution of silver nitrate was prepared for synthesis for silver nanoparticles. 1ml of plant crude extracts was added upon the various concentrations of silver nitrate solution such as 1mM, 3mM and 5mM and abrupt color changes indicates silver synthesis. 4.8 Oxalic acid preparation: The 100 mg of oxalic acid was weighed and dissolved in 100 ml of double distilled water for chemical silver synthesis. 4.8.1 Oxalic acid silver synthesis: 1mM of ethanol

TiO2 nanoparticles were purchased from Sigma-Aldrich (Taufkirchen, Germany). A 5.0 mM stock solution of acetaminophen was prepared by dissolving an appropriate amount of the powder in a small