Controlled drags

Wetting agents and longer workpiece withdrawal/drainage times are two techniques that significantly control drag-out. These and other techniques are discussed below. 

For curious minds The first time you use the PID controllers, drag the icon onto a new simulation window, select the icon and then Look under mask under the Edit pull-down menu. You will see how the controllers are put together. The simple PID controller is... 

Savins, J.G. "A Stress-Controlled Drag-Reduction Phenomenon," SPE paper 1724, 1966 SPE Symposium on Mechanics of Rheologically Complex Fluids, Houston, December 15 16. 

The application of PK and PD to controlled drag delivery has been promoted by, among others, Breimer and Danhof [3,49], and Hoffman [4]. 

A. Zaffaroni, Applications of Polymers in Rate-controlled Drag Delivery, Polym. Sci. Tech. 14, 293 (1981). 

Compounds that show low but intrinsic absorption can be optimized by various galenic techniques and procedures. However, those which possess no absorption ability at all cannot be optimized by such procedures. New strategies have been developed for novel drag delivery systems to control drag release, transport, and absorption across mucosal membranes. A special class of modifiers are amphiphilic... 

In dissolution-controlled drag release devices, drag release is controlled by controlling the dissolution rate of an employed polymer. As... 

A number of novel drag delivery systems have been identified as potential systems for controlling drag-release within the lung and include ... 

Liu C-S, Desai KGH, Meng X-H, Cheng X-G (2007) Sweet potato starch microparticles as controlled drag release carriers preaparation and in vitro drug release. Drying Technol 25 689-693... 

Knepp, V. M., Hinz, R. S., Szoka, F. C., and Guy, R. H. (1988), Controlled drag release from a novel liposomal delivery system. I. Investigation of transdermal potential, /. Controlled Release, 5,211-221. 

Several types of species can diffuse in and out of controlled drag delivery systems, including water, drag, water-soluble excipients (e.g., polymers, plasticizers, and/or fillers), acids, and bases from the environmental bulk fluid as well as polymer degradation products. Often, the polymeric material is chosen in such a way that drag diffusion through the macromolecular network is the rate-limiting step. In these cases, the systems... 

Langer R. Polymeric delivery systems for controlled drag release. Chem Eng Commun 1980 6 ... 

Siepmann J, Kranz H, Bodmeier R, et al. HPMC-matrices for controlled drag delivery a new model combining diffusion, swelling and dissolution mechanisms and predicting the release kinetics. Pharm Res 1999 16 1748-1756. 

Colombo P, Bettini R, Santi P, et al. Swellable matrices for controlled drag delivery gel-layer behaviour, mechanisms and optimal performance. Pharm Sci Technol Today 2000 3 198-204. 

Wright JC, Stevenson CL. Pumps/osmotic. In Mathiowitz E, ed. Encyclopedia of Controlled Drag Delivery, Vol 2. New York John Wiley, 1999. 

Chien YW. Implantable therapeutic systems. In Robinson JR, Lee VHL, eds. Controlled drag delivery. New York Marcel Dekker, 1987 481-522. 

Rotehn-Weinhold A, Dahn M, Gumy R. Formulation and technology aspects of controlled drag delivery in animals. Pharm Sci Technol Today 2000 3 222-231. 

Ferguson TH. Peptide and protein delivery for animal health applications. In Park K, ed. Controlled Drag Delivery. Washington, DC, U.S.A. American Chemical Society, 1997 289-308. 

Berkland C, Kipper MJ, Narasimhan B, et al. Microsphere size, precipitation kinetics and drag distribution control drag release from biodegradable polyanhydride microspheres. J Control Release 2004 94(1) 129-141. 

Siepmann J, Siepmann F, Florence AT. Local controlled drag delivery to (he brain mathematical modeling of the underlying mass transport mechanisms. Int J Pharm 2006 314 101-119. 

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