A Comparison of Various Modifications of the Kjeldahl Method with the Dumas Method of Determining Nitrogen in Coal, with Notes on Errors in the Dumas Method Due to Nitrogen Evolved from the Copper Oxide

A Modification of the Dumas Method, and

A Modification of the Dumas Method, and the Application of the Kjeldahl Method to the Determination of Nitrogen in Nitronaphthalenes.

✍ Brinton, Paul H. M. P. ;Schertz, F. M. ;Crockett, W. G. ;Merkel, P. P. 📂 Article 📅 1921 🏛 American Chemical Society ⚖ 631 KB

Determination of nitrogen in water: comp

Determination of nitrogen in water: comparison of a continuous-flow method with on-line UV digestion with the original Kjeldahl method

✍ Hennie Kroon 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 507 KB

An automated continuous-flow method with on-line UV digestion for the determination of total nitrogen in waste water and surface water is described. The method is based on the digestion of nitrogen by potassium peroxodisulphate catalysed by UV radiation and detected as nitrite (reaction with sulfani

Testing for bias between the Kjeldahl an

Testing for bias between the Kjeldahl and Dumas methods for the determination of nitrogen in meat mixtures, by using data from a designed interlaboratory experiment

✍ Michael Thompson; Linda Owen; Kate Wilkinson; Roger Wood; Andrew Damant 📂 Article 📅 2004 🏛 Elsevier Science 🌐 English ⚖ 169 KB

Bio-Assays for Oxidative Stress Status |

Bio-Assays for Oxidative Stress Status || IN VIVO TOTAL ANTIOXIDANT CAPACITY: COMPARISON OF DIFFERENT ANALYTICAL METHODS11Mention of a trade name, proprietary product, or specific equipment does not constitute a guarantee by the U.S. Department of Agriculture and does not imply its approval to the exclusion of other products that may be suitable.Address correspondence to: R. L. Prior, Ph.D., USDA, ARS, HNRCA, 711 Washington St., Boston, MA 02111, USA; Tel: (617) 556–3311; Fax: (617) 556-3222; E-Mail: [email protected]. Ronald Prior is a Nutritionist and Laboratory Chief of the Phytochemical Laboratory at the Jean Mayer USDA Human Nutrition Research Center on Aging (HNRCA) at Tufts University, Boston, MA. Dr. Prior received his B.S. degree with honors from the University of Nebraska and he received his Ph.D. in Nutrition and Biochemistry from Cornell University in 1972. Dr. Prior has worked with the USDA for more than 20 years.During the past 12 years at the HNRCA, he has been Scientific Program Officer and has directed research activities dealing with the role of flavonoid and other phenolic food components on antioxidant status, their metabolism, and relationships to diseases of aging.Guohua Cao, M.D., Ph.D., is currently a Scientist II at HNRCA. Dr. Cao studied medicine in Nantong Medical College in 1979 and at Nanjing Medical University in 1984. He obtained his Ph.D. in nutritional biochemistry from Beijing Medical University in 1990. Dr. Cao came to the United States in 1991 and worked at NIH where he was instrumental in developing the ORAC method.

✍ PRIOR, RONALD L. 📂 Article 📅 2001 🏛 Elsevier 🌐 English ⚖ 986 KB

This work contains over thirty chapters by leading researchers in the field of oxidative biology, originally presented as articles in an extended Forum in the highly-cited journal, *Free Radical Biology & Medicine*. The papers in this Forum (or Symposium-in-print) spanned seven issues of the journal