NLC were idealized to overcome inherent disadvantages of SLN. Entrapping structure is a blend of solid and liquid, spatially incompatible, lipids that confers distinct characteristics of NLC when compared with other lipid NPs [80]. Indeed, since the matrix of the lipids composing the nanostructured lipid carriers is more amorphous than for SLN, association efficiency is higher and offers a slower release [81]. The nanodroplet of liquid lipid, containing most of the drug to entrap, becomes dispersed within the solid lipid, granting a slower migration of drug to the outer phase and, therefore, a higher entrapment that lasts longer.
It was suggested that using NLC to carry and delivery domperidone in the buccal cavity could lead to a permeability
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The ideal polymers for nanoparticle production must be biodegradable and biocompatible. Moreover, when NPs are produced as buccal delivery systems, the polymers must be mucoadhesive to increase residence time, enhancing the amount of drug that permeates the mucosa and reaches systemic circulation [86]. The mucoadhesion can be obtained either by the formation of electrostatic or hydrogen bonds. Since mucin presents a negative net charge, cationic polymers are preferable for production of mucoadhesive NPs. Moreover, due to hydrophilic nature of mucin, polymers that present a higher number of functional groups capable of establishing hydrogen bonds are preferable …show more content…
In order to develop and optimize polymeric NPs as buccal delivery systems, Pistone et al. chose chitosan, pectin and alginate as matrixpolymers and tripolyphosphate and zinc as negative and positive counterions, respectively [90]. The polymer:counterion proportion was thoroughly studied to achieve the most stable and suitable particles for buccal delivery. The stability was determined by assessing nanoparticle aggregation and disintegration in contact with simulated salivary fluid, along with the variation of polydispersity index, hydrodynamic diameter and zeta-potential. It was observed that alginate NPs presented good stability during 120 min in contact with artificial saliva since some parameters did not significantly vary throughout of the course of the assay. Even though the chelation of zinc ions would be expected due to the high content of phosphates in artificial saliva, so it was suggested that the presence of calcium in the dispersion media prevented the zinc chelation and maintained the structure of alginate NPs intact, as expected to occur in vivo [91]. The size of pectin NPs significantly decreased (with consequent variation of polydispersity index) after contact with artificial saliva, indicating either erosion and/or shrinking due to the formation of additional cross-linking with the ions present in the artificial saliva. The size
Yes, I would agree. However, various papers over the 60 years following Hall’s brutal death are littered with accounts of Dargin's version. Are they mischievous? Probably, but unfortunately, on the surface, they do appear to warrant a passing glance. Furthermore, and Sorry mate, but to imply that Dargin was a drunken aboriginal whose death was somehow self-inflicted dishonours an important member of the overall effort in ending Hall’s life. Dargin had been at the side of some of the most esteemed leaders of the NSW police and more than once displayed an amount of courage equal to and no more or no less than many other troopers who baulked often at confronting the bushrangers. Murdered, why not, there was much talk of retribution by acquaintances,
A series of studies was conducted by Kharitonov V ed al to evaluate the compatibility of liposome bupivacaine with diluents, implanted materials, and other drugs likely to be encountered in the surgical settings in which it is used. Liposome bupivacaine demonstrated compatibility with diluents as normal saline, lactated Ringer's solution and with implanted
Buccal Route- The purpose of Buccal Route is that it comes in different forms Examples: Tablets, Capsules, Lozenges, and Troches. It is placed between the cheek and gum which allows a slow release. Some advantages are that it is a good blood supply. Some disadvantages are that it has a nasty taste. You can not swallow this form of medication. It is inconvenient. You can only have small doses, and you have to hold the dose in the
Microspheres formulated using 0.1 M calcium chloride exhibited the highest drug loading at 14%, with 66.5% encapsulation efficiency. Less than 4% and 35% propranolol release occurred from hydrated and dried microspheres, respectively, in 2 hours in simulated gastric fluid (SGF). 90% of the drug load was released in increments of 5 hours and 7 hours from hydrated and dried microspheres, respectively, in simulated intestinal fluid (SIF). Prior incubation of hydrated microspheres in SGF extended the time of release in SIF to 10 hours. Restricted propranolol release in SGF and complete extraction in SIF demonstrate the potential of alginate gel microspheres for oral delivery of
The major disadvantages associated with buccal routes are low permeability of the buccal membrane, specifically when compared to the sublingual membrane and also a smaller surface area. The total surface area of the membranes of the oral cavity available for drug absorption is 170 cm2 of which ~50 cm2 represents non-keratinized tissues, including the buccal membrane. The continuous secretion of saliva (0.5–2 l/day) leads to subsequent dilution of the drug swallowing of saliva can also potentially lead to the loss of dissolved or suspended drug and, ultimately, the involuntary removal of the dosage form. These are some of the problems that are associated with buccal drug delivery. Moreover, the hazard of choking by involuntarily swallowing
Dental plaque, the stuff that is scraped off one’s teeth in a dental cleaning, is made up of a community of bacteria living together. The bacteria reproduce and produce other substances that combine to form a biofilm, or a layer of living bacteria, dead bacteria, and other components the bacteria produce over a surface, in this case dental plaque on teeth. The University of British Columbia’s Department of Oral Biological and Medical Sciences performed these experiments to determine if Peptide 1018 is
After thorough examination of the Vividata toothpaste research, what follows is the most relevant information about the subject.
DBN is designed for regulating and nourishing one's health through food. By detoxifying toxins in the body, regulating body functions and nourishing it, "DBN" will strengthen the body's immune system and leave you with a healthier body!
In injections, active ingredients are dissolved in a liquid and then injected. A drug is often injected into a vein (intravenous administration) if it is to have as fast an effect as possible, for instance in an emergency.
OTFC comes in a lozenge form with a handle. Lozenge is to be placed in mouth between the cheek and gum and the medicine is to be actively sucked from the unit. OTFC dissolves in saliva of the mouth. Some quantity of fentanyl (approx 25%) from total dose of OTFC is absorbed through the buccal mucosa and becomes systemically available avoiding first pass metabolism. The remaining quantity of fentanyl (approx. 75%) is swallowed with saliva and gets absorbed slowly in the stomach and intestine. From this 75% amount, about 25% escapes hepatic and intestinal first-pass metabolism and reaches systemic circulation. Oral bioavailability of 50% has been reported for OTFC in the literature. The most common opioid related side effects reported after increasing
The Egyptians are also credited with the development of the first toothpaste. In actuality, the first toothpaste actually pre-date the use of the toothbrush by approximately 1500 years. The widespread use of toothpaste, however, did not become popular until around 500 B.C. when it began to be used in China and India. The reasons for the ancient cultures using toothpastes were similar to the reasons why they are used today. In these ancient cultures, the primary use of toothpastes was to keep teeth and gums clean, and to freshen breath but the toothpastes used by these ancient cultures were much different than they are today. The Chinese and Indian culture toothpastes were essentially powders made from various different animal hooves that were combined with pumice which was used for its abrasive effect. Later the Greeks and Romans added crushed bones and oyster shells to their toothpastes in order to add even more abrasiveness. Each of the various cultures tried a variety of flavorings to their toothpastes in order to help with bad breath. Some of
Nanoparticles encapsulated photosensitizers offer several distinct advantages over free photosensitizing molecules, which include high drug loading, increased accumulation of the photosensitizer in the target cells, and inhibiting the target cell’s ability to pump out the photosensitizers [31]. Further, incorporation in the nanoparticles can protect photosensitizers from inactivation in biological environments [32]. In this study, the nanoparticles are formulated using anionic surfactant docusate sodium (aerosol OT, AOT) and a naturally occurring polysaccharide polymer sodium alginate. It has been reported that, besides improving the cellular uptake of encapsulated photosensitizers, AOT-alginate nanoparticles significantly enhanced ROS yield of photosensitizers [33]. The objective of the present study was to investigate the in vitro photodynamic efficacy of MB and TB-loaded AOT-alginate nanoparticles against both planktonic and biofilm phases of Pseudomonas aeruginosa, methicillin-resistant Staphylococcus aureus (MRSA), and their mixed culture. In addition, the in vitro photobactericidal efficacy of nanoparticles encapsulated dyes was compared with the respective free dyes. Our results demonstrate that the AOT-alginate nanoparticles did not improve the in vitro photodynamic efficacy of the encapsulated dyes under experimental conditions.
For the protocols employed throughout the study refer to the Winter 2017 Biology 1A03 Laboratory Manual, experiments two through eight (Tracey). Let it be noted that severely alterations were made to these procedures. During experiment four, the salivary samples were centrifuged for a total of sixty seconds rather than five as per the discretion of the teaching assistant (Tracey 2017). Moreover, the directions for experiment six required students to pipet ten microlitres of their buccal samples into a polymerase chain reaction (PCR) tube but did not account for the fact that the micropipette tips would not fit into the samples tubes (Tracey 2017). Thus, students poured small quantities of the culture into a microcentrifuge tube first and then measured out the ten microlitres from there. Finally, while the script for experiment
A chemical engineer Robert Langer, and his colleagues discovered that when there is mixing of hydrophobic polymers such as ethylene acetate and lactic glycolic acid under appropriate conditions, highly porous structures can be formed by which specific molecules can be released for hundred days. In recent years targeted drug delivery has become an issue of discovery in biomedical and chemical engineering departments.
Now days, people are more aware about global things, that’s why they take more interest to collect information’s and data of the globe. Every user understands the verbal language more clearly. Basic language is very important for the user to get Information. For example, basic language is Hindi in India of about 70% of people. As per human progress review analyze in the year 2012; in India of about 10.35 % are only the people who converse in English. Third largest internet users are in the India.