geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

A rapid computer aided method for the determination of urea in dairy products skim milk powder


, : A rapid computer aided method for the determination of urea in dairy products skim milk powder. Zeitschrift fuer Lebensmittel-Untersuchung und -Forschung 183(2): 101-104

The enzymatic determination of urea in spray-dried skim milk powders was transferred to a computer aided photometric analysing system. Sample preparation is optimal using ultrafiltration, but the direct use of a milk sample is also possible with this system. The precision including sample preparation as coefficient of variation was about 0.69%, the standard deviation of the assay was 0.115-0.135 at an average content of 5.4-5.5 mg urea per 100 ml skim milk. The method was tested on 147 spray-dried skim milk powders, which were of varying origin and collected at different times of the year (Jan.-Oct.). In this way a representative survey for the urea content of a great number of skim milk powders was possible. It was also shown, that the urea content is highly affected by season. It is very constant from February to May (0.25-0.26%), and rises from June to October up to nearly 0.32%.

US$29.90


Other references

J.P.Jones S.S.Woltz, 1969: Field control of Fusarium wilt (race 2) of Tomato by liming and stake disinfestation. Some of this information has been noticed . Both hydrated lime treatments (1000 and 2000 Ib/acre) reduced incidence of F. oxysporum f.sp. lycopersici in Manapal tomato and increased marketable yields by c. 120-130 bushels/acre. The pathogen was is...

Uvírová, L.; Knopová, V.; Santavý, J., 1985: Biopsy of chorionic villi in the 1st trimester of pregnancy and their culture in vitro. Ceskoslovenska Gynekologie 50(9): 633-639

Morgan, T.K.; Hanifin, J.; Mahmood, M.; Larson, B.; Baig-Lewis, S.; Long, T.; Lim, J.Y.; Berlin, M.; Weese, K., 2016: Atopic Dermatitis Is Associated With Cervical High Risk Human Papillomavirus Infection. High-risk human papillomavirus (hrHPV) infection is more likely to persist and cause cervical cancer in immunosuppressed women. Atopic dermatitis, which is known to affect cell-mediated immunity and skin barrier function, is associated with recalc...

Muramatsu, T.; Shimamura, M.; Furuichi, M.; Ishimoto, S.; Ohmori, K.; Shiono, M., 2012: Treatment strategies for chronic expanding hematomas of the thorax. To investigate retrospectively the treatment strategies for chronic expanding hematoma (CEH) of the thorax.We reviewed the medical records of six patients treated for CEH of the thorax at our institution between October 1996 and October 26. All of...

Miller, D.V.; Wang, H.; Wang, H.; Fealey, M.E.; Tazelaar, H.D., 2007: Beta-catenin mutations do not contribute to cardiac fibroma pathogenesis. Cardiac fibromas are the 2nd most common benign cardiac tumor occurring in children and bear a striking morphologic resemblance to soft tissue or desmoid fibromatosis. Since activating mutations in beta-catenin are common in desmoid fibromatosis a...

Vasilov, S.I.; Nikolaeva, N.I.; Degtiarev, A.F.; Kabatchenko, O.A., 1969: Fluorescence method for the determination of strophanthin K in the solution. Farmatsiia 18(3): 61-64

Potyrailo, R.A.; Conrad, R.C.; Ellington, A.D.; Hieftje, G.M., 1998: Adapting selected nucleic acid ligands (aptamers) to biosensors. A flexible biosensor has been developed that utilizes immobilized nucleic acid aptamers to specifically detect free nonlabeled non-nucleic acid targets such as proteins. In a model system, an anti-thrombin DNA aptamer was fluorescently labeled and...

Tian, Y-Sheng.; Chen, L.; Ren, Z-Wan.; Wang, X-Yi.; Liang, T-Ying.; Wang, L-Sheng., 2009: Observation on therapeutic effect of medicinal moxa stick moxibustion for treatment of tinea pedis. To observe therapeutic effect of using medicinal moxa stick moxibustion for treatment of tinea pedis. One hundred and forty-four cases were randomly divided into a medicinal moxa stick group (MMS), a moxa stick group (MS) and a Nitramisole cream g...

Herrmann, I.F., 1999: Surgical voice restoration following laryngectomy. Laryngo- Rhino- Otologie 78(6): Op57-Op68

Pelegrin, P., 2008: Targeting interleukin-1 signaling in chronic inflammation: focus on P2X(7) receptor and Pannexin-1. Innate immunity is the most ancient system to protect multicellular hosts from infections. In vertebrates it is regulated by an extensive and complex network of cytokines that orchestrate inflammation, a response of the body to invasion by infecti...