Wait a second!
More handpicked essays just for you.
More handpicked essays just for you.
process modeling in system analysis and design
Don’t take our word for it - see why 10 million students trust us with their essay needs.
Recommended: process modeling in system analysis and design
A Model- Based Methodology for Spray Drying Process Development
Journal of Pharmaceutical Innovation September 2009 Volume 4 Issue 3
This paper describes a novel methodology based on fundamental engineering models as well as process characterization techniques to ensure that the spray drying process is efficient and requires minimal time and API. Spray drying methods use rapid drying kinetics to produce solid amorphous dispersions, excipients, and encapsulation. Spray drying dispersions are used to increase bioavailability of poorly soluble APIs. SDDs formulations include polymers that increase stability of the amorphous form so that the solubility of the drug can be increased. This novel methodology has the advantage of minimizing API usages during process development, reducing process development time and ensuring process robustness during technology transfer to clinical manufacturing. This method outlines specific steps based on flow rates, thermodynamics and drying kinetics to produce a more efficient process for spray drying. It is particularly efficient for process development and circumvents the iterative design of experiment (DOE) method for spray drying process development.
The typical spray drying process begins when a spray solution is delivered to an atomizer in a spray drying chamber at the same time as hot drying gas. Spray solutions consist of API and polymers dissolved in a solvent. This solution is atomized into droplets using a spray nozzle. There are an assortment of nozzles that can be used in this process including two-fluid, ultrasonic, rotary, and pressure nozzles. The advantage of using a pressure nozzle is that it allows for scalability and the tuning of droplet size. When droplets from the spray no...
... middle of paper ...
...ge of physicochemical properties of drugs such as HPMCAS, thus making the first screening step more efficient. This method should also incorporate experiments that correlate the theoretical parameters given by computer models with the parameter actually seen during the process.
Work Cited:
Dobry, D. E., Settell, D. M., Baumann, J. M., Ray, R. J., Graham, L. J., & Beyerinck, R. A. (2009). A Model-Based Methodology for Spray-Drying Process Development. Journal of Pharmaceutical Innovation, 4(3), 133-142.
Friesen, D. T., Shanker, R., Crew, M., Smithey, D. T., Curatolo, W. J., & Nightingale, J. A. (2008). Hydroxypropyl Methylcellulose Acetate Succinate-Based Spray-Dried Dispersions: An Overview. Molecular pharmaceutics, 5(6), 1003-1019.
Vehring, R. (2008). Pharmaceutical Particle Engineering via Spray Drying. Pharmaceutical Research, 25(5), 999-1022.
The analysis is therefore one of the most effective methods of ensuring that each drug being prescribed to patients is safe. It also ensures that all drug components are understood in terms of their structure and chemical behavior. This understanding is very important in the manufacture of drugs and other pharmaceutical products.
Drypers holds a competitive position in the market because they have product innovation. With the great features offered with their products, they hold a solid positon in the market. Although their products are premium quality, they’re sold at great prices that consumers love.
A self-sterilizing formula is one that either prevents microbial growth (bacteriostatic) or kills-microorganisms (bactericidal /microbicidal).a self –preserving formula may or may not contain antimicrobial preservatives. Relatively anhydrous products (e.g. talcum powder, corn starch, mineral oil, and stick deodorants) do not require preservatives because they do not have sufficient water content to supply microbial growth. However, manufactures may incorporate preservatives in to these products to prevent microbial growth that may occur due to addition of water by consumer during use or abuse. The physicochemical make-up of the product, including low water activity (aw), high or low pH, and multifunctional materials that have antimicrobial properties (e.g. alcohol, surfactants, quaternary ammonium companies) determines whether a formula is self-preserving. Aqueous products in multiuse containers generally require the addition of preservation if they do not prevent microbial growth. The type of packaging and consumer use habits determines the preservation requirements of a
Michael P. Broadribb, C. (2006). Institution of Chemical Engineers . Retrieved July 26, 2010, from IChemE: http://cms.icheme.org/mainwebsite/resources/document/lpb192pg003.pdf
Size and stability: Liquid formulation can be bulky, difficult to transport and store.1 During storage under the stated conditions, it’s necessary that oral solutions are not subject to precipitation, fast sedimentation, caking or formation of lump.2 They have poor stability compare to solid dosage form formulation due to hydrolysis.1 Therefore, it’s important to optimize the active ingredient stability in liquid formulation including those prepared from powder or granules.2
When looking at custom t-shirts, hoodies, tote bags, water bottles, etc. you may see different print methods that were used, such as silk screening or heat transfers. Both process have their advantages and disadvantages. A lot of the decision of which method to use will come down to the number of items being produced. For small batches, maybe fewer than ten, it may be cheaper to go with a heat transfer process, but with larger quantities, the times savings will counteract the setup cost and it will wind up costing less all together.
As we discussed above that pharmacokinetic and pharmacodynamics can be seen as two sides of the same coin in order to gain better understanding of their efficacy and safety profiles.” Generally it is possible to make fairly robust predictions of the pharmacokinetic profile in man using in vitro systems and preclinical pharmacokinetic studies. A previously published survey on the causes of failure in drug development indicated that inappropriate pharmacokinetics were a major cause such as; factors as low bioavailability due to high extraction or poor absorption characteristics, short elimination half-life leading to short duration of action and excessive variability due to genetic or environmental factors. This observation has led to an increased emphasis on pharmacokinetic input to the drug discovery process throughout the pharmaceutical industry. However, it is important to realise that this may only permit the rejection of compounds to b...
biopharmaceutical industry. Manuscript submitted for publication, Sloan School of Management and the Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts. Retrieved from dspace.mit.edu/bitstream/handle/1721.1/34827/61670866.pdf?sequence=1.
The global market of maleic anhydride was around 4 billion USD in 2012 [3], with US market volume being around 225 million USD [1], and expected to grow up to around 6 billion USD by 2018 with 6.4% compound annual growth rate whereas the market share for the United states forecasted to surge to 300 million USD by 2020. As mentioned above, the global market volume is much higher compared to the United States, with Asia being the biggest consumer, around 60%, [4] and consequently establishing a plant in the United States with global target market will be ineffective. This is due to the high capital investments required to set up the plant and all the processing costs associated with it will be relative to the target market, United States, and production of the product for exporting purposes will be ineffective as it can hardly compete the global market in consideration to the consumption scale of the product. Unsaturated polyester resins was the biggest
Analysis of Aspirin Tablets Aim --- To discover the percentage of acetylsalicylic acid in a sample of aspirin tablets. ----------------------------------------------------------------- In order to do this, the amount of moles that react with the sodium hydroxide must be known. This is achieved by using the method of back titration.
Živković, Snežana; Takić, Ljiljana; Živković, Nenad UNAPREĐENJE EKOLOŠKIH PERFORMANSI PRIMENOM STANDARDA ISO 14001 - STUDIJA SLUČAJ.. Chemical Industry & Chemical Engineering Quarterly. 2013, Vol. 19 Issue 4, p541-552. 12p. DOI: 10.2298/CICEQ120513088Z. ,
Enhanced Nutrient Delivery: Nano-encapsulating improves the solubility of antioxidants, vitamins, healthy omega oils and other neutraceuticals
Molecular pharmacology deals with the biochemical and biophysical characteristics of interactions between molecules of different substances and those of the cell. In other words, it is molecular biology applied to pharmacologic and toxicologic questions. The methods of molecular pharmacology include precise mathematical, physical, chemical and molecular biological techniques to understand how cells respond to hormones or pharmacologic agents, and how chemical structure correlates with biological activity of various
The basis of the discipline focused on understanding of the chemistry of food components such as proteins, carbohydrates, fats and water and reaction during processing than storage. Good understanding about processing and preservation method are needed which includes drying, pasteurization, canning and irradiation (Susan, 2012).
Freeze drying, otherwise known as lyophilization, is a form of drying that is done by freezing a wet substance and allowing the ice to directly sublime to vapor by exposing it to a low-pressure amount of water vapor. This method of drying takes place in a special type of vacuum desgned for this method. Freeze drying is used in many instances, often as a means to preserve material or decrease the weight of that material; thus allowing transportation of certain substances to become less difficult.