Phenols

curve to find the sample’s phenolic concentration in milligrams of gallic acid equivalent for every 100 milliliters of juice. Materials and Methods This experiment used the Gilson pipetman Neo, Genesys 20 spectrophotometer, Folin-Ciocalteu’s phenol reagent, saturated Na2CO3 solution as well as the requisite test tubes, volumetric flasks, analytical scale and graduated cylinder necessary to obtain accurate results. The first step required the preparation of the gallic acid stock solution.

Effects of grapefruit, mango and strawberry fruit juice as a natural antioxidants and lowering diabetics in rats Safaa Moustapha Abd El Fatah Faid12 ,FadlAlla, Eman Aly Sadeek21, Ebtihal Yaqoob Khojah3 1 Home Economics Dept. Faculty of specific Education, Ain Shams University, Egypt 2Department of Biochemistry & Nutrition Women 's College, Ain Shams University, Egypt. 3 Food science and nutrition Dept. Designs and home economic college, Taif University E-mail: dr_safaa2010@yahoo.com ABSTRACT

By Joseph Lister using antiseptics in surgery, the cleanliness of modern surgery is very sanitary and does not cause infection to patients and many of the infections led to amputations and death. Joseph Lister was born in 1827 in Newham and he died in 1912. (Lister’s carbolic spray, n.d. para. 1) Lister married his boss’s daughter Agnes. Lister and Agnes had no children. Agnes was always helpful in his experiments. (Lamont, 1992, para, 7) Lister was always interested in science, even as a child

64:4 (2013) 125–130 | www.jurnalteknologi.utm.my | eISSN 2180–3722 | ISSN 0127–9696 Jurnal Full paper Teknologi Phenol Removal from Water by Pulsed Power Discharge: A Review Hashem Ahmadia, Muhammad Abu Bakar Sidika,b*, Mehrdad Khamooshic, Zulkafle Buntata aInstitut Voltan dan Arus Tinggi (IVAT) and Faculty of Electrical Engineering, Universiti Tenologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia bDepartment of Electrical Engineering, Faculty of Engineering, Universitas Sriwijaya, 30662 Inderalaya

Antioxidative activity can be tested using total phenolic content (TPC), 2, 2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) tests. In TPC test, Folin–Ciocalteu reagent (mixture of phosphomolybdate and phosphotungstate) is used to determine the antioxidant potential of phenolic and polyphenolic from the sample. DPPH bonds with hydrogen atom from sample while hydrogen peroxide (H2O2) bonds with iron ion (Fe3+) to form iron (III) thiocyanate, Fe(SCN)3 in the FRAP test

Chapter Five Discussion Extraction is a process by which substances and active constituents are separated from the original matrix, extraction process depends on many physical and chemical characteristics. Extraction is divided into two types liquid phase extraction and solid phase extraction depending on the physical phase of extraction agent(Rezaee et al., 2006). In our study, we have adopted liquid phase extraction for several reasons. Firstly, simple, inexpensive, relatively precise and wide

BACKGROUND AND SIGNIFICANCE. Alexander Dianin was a Russian chemist who first compounded Bisphenol A, during the year 1891. Bisphenol A is commonly referred to as BPA. Dianin was carrying out studies on phenol compounds and synthesized BPA by condensing acetone with two equivalent parts of phenol. The “A” in BPA denotes acetone in its composition. (1) At first, the development of BPA was solely an academic exercise. Dianin was the chair of the Chemistry Department / Imperial Medial Academy in St

Red beets are one of the pivotal sources of dietary phenolic compounds, including phenolic acids and flavonoids (). These compounds are secondary metabolites which are essential for the plant growth and development, provides protection against pathogens and predators and are contributors of antioxidant, anti-microbial, anti-inflammatory, anti-allergenic, anti-thrombotic, anti-atherogenic, cardioprotective and, vasodilatory properties (Balasundram et al., 2006). The total phenolic (TPC) and flavonoid

Anti- diabetic and antioxidant effects of grapefruit, mango and strawberry juice in streptozotocin – induced diabetic rats Safaa Moustapha Abd El Fatah Faid1 , , Eman Aly Sadeek FadlAlla 2, Ebtihal Yaqoob Khojah3 1 Home Economics Dept. Faculty of specific Education, Ain Shams University, Egypt 2 Biochemistry & Nutrition Dept. Women 's College, Ain Shams University, Egypt. 3 Food science and nutrition Dept. Designs and home economic college, Taif University E-mail: dr_safaa2010@yahoo.com, dr_emansaddeek@yahoo

Finally, the detector voltages were optimized to obtain the best sensitivity for target compounds. Here, the S/N value was used to measure the effect of detector voltage on the sensitivity, because both the peak signal and noise signal increase with detector voltage. The effect of detector voltages (1.65, 1.70, and 1.75 kV) on several representative compounds is shown in Figure 5. With increasing voltage, the trends of S/N values for different compounds are different, but that of each class is basically