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| | Bioavailability Systems - Redefining the Curve |
 | | Bioavailability Systems LLC is an emerging biopharmaceutical company focused on developing applications for our potent cytochrome P450 3A inhibitors to enhance the therapeutic and pharmacoeconomic benefits of oral pharmaceuticals. |
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http://www.bioavailsys.com
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| | Nat' Academies Press, Bioavailability of Contaminants in Soils and Sediments: Processes, Tools, and Applications (2003) |
| | Bioavailability processes leading up to absorption (A–C) are also included in human health risk assessments, but are instead described as “fate and transport” processes. | | | Human Health Risk Assessment In human health risk assessment, “bioavailability” is specifically used in reference to absorption into systemic circulation—consistent with the toxicological use of the term. | | | In planning a bioavailability assessment, which typically will involve measurement of various physical-chemical properties and some kind of biological response, the objective should be to characterize only the most critical features of the system using appropriate tools. |
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http://www.nap.edu/books/0309086256/html/1.html
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| | Bioavailability of Inorganic Arsenic from Bog Ore-containing Soil in the Dog |
| | The results obtained from the present investigation on the bioavailability of inorganic arsenic from bog ore-containing soil in dogs stress the need to reconsider the present practice of risk assessment for arsenic in soil in residential areas. | | | The study described here was performed to determine the bioavailability of arsenic from bog ore-containing soil. | | | Environmental Health Perspectives (EHP) is a monthly journal of peer-reviewed research and news on the impact of the environment on human health. |
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http://ehp.niehs.nih.gov/members/1994/102-2/groen-full.html
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| | Scale-Up Effects on Dissolution and Bioavailability of Propranolol Hydrochloride and Metoprolol Tartrate Tablet ... |
| | These results suggest that the scale-up process does not significantly affect the bioavailability of highly soluble, highly permeable drugs and in vitro dissolution tests may be useful in predicting in vivo behavior. | | | This research examined the influence of scale-up on the in vitro dissolution and in vivo bioavailability of 2 highly soluble and permeable drugs, propranolol and metoprolol. | | | Previous work found that broad differences with in vitro dissolution that resulted from SUPAC-IR Level 2 changes had no effect on the dissolution or bioavailability of metoprolol or propranolol formulations. |
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http://www.aapspharmscitech.org/view.asp?art=pt010214&pdf=yes
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| | Bioavailability - Wikipedia, the free encyclopedia |
| | Bioavailability is a measurement of the rate and extent of therapeutically active drug that reaches the systemic circulation and is available at the site of action. | | | This means that there are factors at work which reduce the availability of the drug prior to it entering the systemic circulation. | | | In pharmacology, bioavailability is used to describe the fraction of an administered dose of medication that reaches the systemic circulation, one of the principal pharmacokinetic properties of drugs. |
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http://en.wikipedia.org/wiki/Bioavailability
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| | Bioavailability of Soilborne Lead in Adults, by Stable Isotope Dilution |
| | Environmental Health Perspectives (EHP) is a monthly journal of peer-reviewed research and news on the impact of the environment on human health. | | | The sensitivity of the stable isotope dilution technique as an analytical tool to study bioavailability is driven by the difference between the blood | | | Until now, however, there have been no controlled studies assessing the bioavailability of soilborne Pb in humans. |
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http://ehp.niehs.nih.gov/members/1998/Suppl-6/1589-1594maddaloni/maddaloni-full.html
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| | Science Panel Report on the Bioavailability of Lead in Red Dog Ore |
| | The bioavailability studies performed using the Red Dog Mine and Skagway ore concentrate were very similar. | | | The rat bioavailability study performed by the NTP confirmed these conclusions. | | | The lead bone concentration in animals fed 100 ppm lead acetate was 260 mg/kg. |
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http://www.dec.state.ak.us/spar/csp/docs/reddog/scipanreport_bioav_of_pb.htm
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| | Molecular Properties That Influence the Oral Bioavailability of Drug Candidates |
| | Oral bioavailability measurements in rats for over 1100 drug candidates studied at SmithKline Beecham Pharmaceuticals (now GlaxoSmithKline) have allowed us to analyze the relative importance of molecular properties considered to influence that drug property. | | | Thus, an important goal for drug research is to gain sufficient understanding of the molecular properties that limit oral bioavailability to facilitate the design of viable new drug candidates. | | | The negative impact of a high polar surface area on intestinal absorption is recognized. |
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http://pubs.acs.org/cgi-bin/jcen?jmcmar/45/i12/html/jm020017n.html
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| | Bioavailability of Nutrients and Other Active Components of Dietary Supplements (CBM 99-4) |
| | These goals were accomplished through consideration of generic issues concerning bioavailability and the application of general scientific principles for the study of bioavailability to case studies of several well-characterized substances. | | | The conference/workshop entitled, "Bioavailability of Nutrients and Other Bioactive Components of Dietary Supplements: Defining the Research Agenda" was held in Natcher Auditorium at The National Institutes Of Health, Bethesda, MD on January 5-January 6, 2000. | | | Chronic disease of adulthood is causing an ever-rising burden on the U.S. healthcare system. |
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http://www.nlm.nih.gov/archive/20040829/pubs/cbm/bioavailability.html
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| | Bioavailability Workshop |
| | The 2003 U.S. EPA Bioavailability Workshop was a 2-day meeting (4 half-day panel sessions) to provide the EPA with expert technical opinions specific to applications of bioavailability measurements for human health risk assessment. | | | The EPA expects to use information presented during this workshop in its efforts to establish the most scientifically-sound approach to utilizing bioavailability measurements at contaminated sites. | | | National experts participated through presentations and panel discussions. |
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http://conference.syrres.com
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| | Substantial improvement of oral bioavailability of TMC125 using new tablet formulations in healthy volunteers |
| | The novel formulations tested were all associated with significantly higher Cmax and AUC values compared with the reference formulation, while tmax was not affected. | | | -A substantial improvement in the oral bioavailability of TMC125 has been achieved by means of reformulation. | | | -We conducted a study (TMC125-C170) to determine the relative oral bioavailability of four of these new formulations, compared with the reference formulation TF035, in healthy subjects. |
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http://www.natap.org/2005/ias/ias_17.htm
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| | Welcome to Grand Meadows |
| | However, we are always open to change, and if in the future we see significant evidence of forms of chondroitin sulfate that show better bioavailability, we will be more than willing to re-evaluate our thoughts on this ingredient. | | | Another development that we saw in the category was the introduction of liquid joint supplements, like devil’s claw, boswellia, bromelain, yucca & msm, many of which claimed dramatic results in as little as five days — our sentiments about this approach are addressed above. | | | We are excited about introducing these products, but only when we are completely satisfied with their levels of bioavailability and efficacy. |
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http://www.grandmeadows.com/grandCorner.html
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| | BIO Comments on Bioavailability and Bioequivalence |
| | We are writing in response to the request by the Food and Drug Administration (FDA) for comments on certain provisions in Title XI of the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (MMA). | | | Bioequivalence, in turn, was also defined in terms of the "rate and extent of absorption" of a test and a reference drug. | | | Prior to the enactment of MMA, the term bioavailability was defined under FDCA to mean "the rate and extent to which the active ingredient or therapeutic ingredient is absorbed from a drug and becomes available at the site of drug action" (21 USC 355(j)(8)). |
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http://www.bio.org/reg/20040511BaBe.asp
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| | Cornell News: DDT bioavailability |
| | "We have devised an analytical procedure that actually determines the bioavailability of three major pollutants that are often present in unacceptably high concentrations in soil and aquatic sediments," Alexander said. | | | The study, reported as, "Chemical-Extraction Methods to Estimate the Bioavailability of DDT, DDE, and DDD in Soil," was conducted by Jixin Tang and Boakai K. Robertson, both research associates working in Alexander's lab. | | | Age can be an important factor in bioavailability, Alexander explains, because the compounds might be sequestered in the soil and are less likely to be absorbed by living organisms. |
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http://www.news.cornell.edu/releases/Nov99/bioavailability.hrs.html
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| | LiverSupport.com - Powerful liver protection starts with milk thistle |
| | Although silymarin is quite effective clinically, it is not very bioavailable (it is hard for the body to absorb). | | | The authors concluded that this complex may effectively improve hepatic function in patients with chronic active hepatitis.." | | | In contrast, binding one molecule of silymarin with two molecules of phosphatidylcholine in the Phytosome® process creates a highly bioavailable new form of silymarin. |
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http://www.liversupport.com
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| | Exercise training improves aortic endothelium-dependent vasorelaxation and determinants of nitric oxide bioavailability ... |
| | Exercise training improves aortic endothelium-dependent vasorelaxation and determinants of nitric oxide bioavailability in spontaneously hypertensive rats -- Graham and Rush 96 (6): 2088 -- Journal of Applied Physiology | | | The present study examined in vitro vasomotor function and expression | | | Articles by Graham, D. Articles by Rush, J. Exercise training improves aortic endothelium-dependent vasorelaxation and determinants of nitric oxide bioavailability in spontaneously hypertensive rats |
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http://www.jap.org/cgi/content/abstract/96/6/2088
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| | Phares |
| | Screening and Formulation Services to assist our clients with the development of poorly soluble actives. | | | Boost bioavailability and enhance solubilization to get the most out of hydrophobic and lipophilic compounds. |
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http://www.phares.biz
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| | Bioavailability and dissolution of CoQ10 |
| | Additional studies have been carried out in rats to determine tissue uptake. | | | A relative bioavailability study in dogs has confirmed these findings. | | | Several human studies have been subsequently carried out to compare the relative bioavailability of Q-Gel® with other currently available dosage forms (softgels, tablets and capsules), and the data obtained from these studies clearly demonstrate that Q-Gel® is vastly superior (several times higher relative bioavailability than all other dosage forms tested). |
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http://www.amazing-hgh.com/Q-gel-absorption.htm
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| | Decreased Arginine Bioavailability and Increased Serum Arginase Activity in Asthma -- Morris et al. 170 (2): 148 -- ... |
| | Department of Emergency Medicine and Pediatric Clinical Research Center, Children's Hospital and Research Center at Oakland, Oakland; Children's Hospital Oakland Research Institute, Oakland, CA; and Department of Molecular Genetics and Biochemistry, University of Pittsburgh School of Medicine, Pittsburgh, PA | | | Decreased Arginine Bioavailability and Increased Serum Arginase Activity in Asthma | | | Decreased Arginine Bioavailability and Increased Serum Arginase Activity in Asthma -- Morris et al. |
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http://www.ajrccm.org/cgi/content/abstract/170/2/148
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| | Waiver of In Vivo Bioavailability and Bioequivalence Studies for Immediate-Release Solid Oral Dosage Forms Based on a ... |
| | A Theoretical Basis For a Biopharmaceutics Drug Classification: The Correlation of In Vitro Drug Product Dissolution and In Vivo Bioavailability, | | | Regulations at 21 CFR part 320 address the requirements for bioavailability (BA) and BE data for approval of drug applications and supplemental applications. | | | This guidance provides recommendations for sponsors of investigational new drug applications (INDs), new drug applications (NDAs), abbreviated new drug applications (ANDAs), and supplements to these applications who wish to request a waiver of in vivo bioavailability (BA) and/or bioequivalence (BE) studies for immediate release (IR) solid oral dosage forms. |
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http://www.fda.gov/cder/guidance/3618fnl.htm
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| | Healthnotes - About Healthnotes Contributors |
| | We regularly update our knowledgebase by annually reviewing thousands of articles published in more than 600 peer reviewed medical journals to ensure consumers receive fully referenced, up-to-date health information based on the latest scientific and medical research. | | | This information covers the ways in which common prescription and over-the-counter drugs interact with herbs, vitamins, and foods, including potential nutrient depletions, interference with drug actions, reduction of drug side effects, and interference with drug absorption (bioavailability) when taking herbs, nutritional supplements, or food with certain medications. | | | Healthnotes drug-nutrient interaction content (known as Safetychecker or Using Medicines with Vitamins and Herbs) is written by a team of experts from the fields of medicine, pharmacy, naturopathy, and public health. |
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http://www.healthnotes.com/Company/contributors.cfm
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| | 2003 CFR Title 21, Volume 5 |
| | Correlation of bioavailability with an acute pharmacological effect or clinical evidence. | | | Analytical methods for an in vivo bioavailability or bioequivalence study. | | | Guidelines for the conduct of an in vivo bioavailability study. |
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http://www.access.gpo.gov/nara/cfr/waisidx_03/21cfr320_03.html
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| | Vitamin C, Linus Pauling Institute's Micronutrient Information Center |
| | The possibility that the bioavailability of L-ascorbic acid from natural sources might differ from that of synthetic ascorbic acid was investigated in at least two human studies and no clinically significant differences were observed. | | | Bioavailability refers to the degree to which a nutrient (or drug) becomes available to the target tissue after it has been administered. | | | The effect of bioflavonoids on the bioavailability of ascorbic acid has been examined in two published studies. |
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http://lpi.oregonstate.edu/infocenter/vitamins/vitaminC/vitCform.html
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| | FeZn Bioavailability |
| | Effect of protein source on the bioavailability of zinc in human subjects. | | | The balance between absorption facilitators and inhibitors, along with the existing iron/zinc status of the individual determines the bioavailability of iron and zinc from individual foods or from a meal (10-23). | | | During counseling, steps must be taken to determine whether the client is at risk for iron and/or zinc deficiency since the bioavailability of iron and zinc varies depending upon the dietary source. |
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http://www.andrews.edu/NUFS/FeZnbioavail.htm
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| | CU Food Science - Parker |
| | Our major goal in studying metabolism and bioavailability of vitamin E is to clarify the pathways of catabolism and elimination of the tocopherol vitamers that constitute the vitamin E family of compounds whose function is thought to involve radical trapping antioxidant activity. | | | We are also investigating the mechanism of preferential retention of the natural tereoisomeric form of a -tocopherol over other stereoisomers found in synthetic a -tocopherol, using differentially deuterated natural and synthetic a -tocopherol with GC-MS analysis. | | | This method may be used to investigate such parameters as cooking method, variety, and meal fat or fiber content on the bioavailability of provitamin A carotenoids from food sources or supplements. |
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http://www.foodscience.cornell.edu/faculty/parker.htm
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| | How Much Calcium is enough |
| | Bioavailability refers to how well the digestive system can absorb calcium. | | | You need to eat larger amounts of foods with low bioavailability to get the same level of calcium into your body. | | | This absorption depends on the overall level of calcium in a food and the specific type of food being eaten. |
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http://www.nichd.nih.gov/milk/whycal/howmuch_cal.cfm
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| | Calcium Forms, Bioavailability Subject of Industry Discussion |
| | Given the similarities of the various sources, as well as similar bioavailability levels, it is apparent that the end benefits for the consumer are the same, regardless of the origin of the calcium. | | | Further, studies have shown that solubility of calcium forms does not significantly affect absorption. | | | As the supplement passes through the body, studies have shown there is little difference in bioavailability between all major types of calcium. |
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http://www.naturalproductsinsider.com/articles/2c1ingredient.html
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| | EPA: Term : |
| | A measure of the physicochemical access that a toxicant has to the biological processes of an organism. | | | The less the bioavailability of a toxicant, the less its toxic effect on an organism. |
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http://oaspub.epa.gov/trs/trs_proc_qry.navigate_term?p_term_id=16299&p_term_cd=TERMDIS
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| | A Gut Issue—Measuring Iron Bioavailability |
| | Meanwhile, Glahn and his research team continue to apply, adapt, and refine their model. | | | Glahn believes it can eventually be used to measure bioavailability of other micronutrients, such as vitamin A, zinc, selenium, and iodine. | | | Glahn has applied for a U.S. patent on his model gut. |
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http://www.ars.usda.gov/is/AR/archive/aug99/iron0899.htm
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| | Nat'l Academies Press: Bioavailability of Contaminants in Soils and Sediments: Processes, Tools, and Applications |
| | Bioavailability refers to the extent to which humans and ecological receptors are exposed to contaminants in soil or sediment. | | | The current use of bioavailability in risk assessment and hazardous waste cleanup regulations is demystified, and acceptable tools and models for bioavailability assessment are discussed and ranked according to seven criteria. | | | Finally, the intimate link between bioavailability and bioremediation is explored. |
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http://www.nap.edu/catalog/10523.html
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| | Amazon.com: Bioavailability in Environmental Risk Assessment: Books |
| | Since bioavailability can alter health risk estimates by a factor of 10, 100 or more, its importance in risk assessment cannot be underestimated. | | | Presenting the basic principles that govern bioavailability and how it is measured, this very unique and timely book fills a void in the existing literature on toxicology and toxicokinetics. | | | CAPs: Health Persp, Marcel Dekker, Boca Raton, Experimental Exposure Bioavailability Compound Species, Total Environ (more) |
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http://www.amazon.com/exec/obidos/tg/detail/-/1566701864?v=glance
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