Interaction between flavonoid, quercetin and surfactant aggregates with different charges

2006 ◽  
Vol 302 (2) ◽  
pp. 625-632 ◽  
Author(s):  
Weiya Liu ◽  
Rong Guo
Keyword(s):  
Surfactant Aggregates ◽  
Flavonoid Quercetin

Pengaruh Pemberian Ekstrak Jambu Biji (Psidium Guajava) Terhadap Kadar Trigliserida Darah Tikus Putih (Rattus Norvegicus) Jantan Galur Wistar Yang Diinduksi Deksametason

2018 ◽  
Vol 16 (1) ◽  
pp. 81
Author(s):  
MARIA EVANE NAVY CAHAYA PUTRI ◽  
NITA PRANITASARI
Keyword(s):  
Plasma Level ◽  
Triglyceride Level ◽  
Rattus Norvegicus ◽  
Food Group ◽  
Psidium Guajava ◽  
Triglyceride Synthesis ◽  
Flavonoid Quercetin

<p><strong>Abstract</strong></p><p> </p><p>Dexamethasone induction may result in increased of both triglyceride synthesis and VLDL plasma level, which contribute to the increase in triglyceride level. Guava (<em>Psidium guajava)</em> consists flavonoid (quercetin) compounds that can inhibit triglyceride synthesis and decrease blood triglyceride level.</p><p><strong>Methode</strong></p><p>This research used 24 rats divided into 3 groups: group of rats fed with standard food, group of rats induced by 0.13 mg/kgBW dexamethasone for 14 days starting from day 8, and group of rats induced by 0.13 mg/kgBW dexamethasone for 14 days starting from day 8 and received 3 gr/kgBW guava extract for 21 days. On day 22, blood triglyceride level was measured with glycerol blanking method.</p><p><strong>Result</strong></p><p>The result of <em>Mann-Whitney U</em> showed that blood triglyceride level of group of rats induced by dexamethasone (=198.25±55.296 mg/dl) was significantly higher (p=0.001) than group of rats fed with standard food (=68.50±16.062 mg/dl). Blood triglyceride level of group of rats induced by dexamethasone and received guava extract (=98.75±26.778 mg/dl) did not significantly decreased (p=0.487) compared to group of rats induced by dexamethasone (=198.25±55.296 mg/dl).</p><p><strong>C</strong><strong>onclusion</strong></p><p>The conclusion of this research showed that dexamethasone significantly increased blood triglyceride level and guava extract tend to decrease blood triglyceride level because guava consists flavonoid (quercetin) compounds.</p><p><strong> </strong></p><p><strong>Keywords</strong>: <em>Psidium guajava, triglyceride</em>, <em>dexamethasone</em><em></em></p>

scholarly journals Determination of antioxidant activity and phenolic compounds for basic standardization of Turkish propolis

2021 ◽  
Vol 64 (1) ◽  
Author(s):  
Aslı Özkök ◽  
Merve Keskin ◽  
Aslı Elif Tanuğur Samancı ◽  
Elif Yorulmaz Önder ◽  
Çiğdem Takma
Keyword(s):  
Antioxidant Capacity ◽  
Caffeic Acid ◽  
Caffeic Acid Phenethyl Ester ◽  
Total Phenolic ◽  
Scaling Analysis ◽  
Flavonoid Content ◽  
Multidimensional Scaling Analysis ◽  
Flavonoid Quercetin ◽  
Phenolic And Flavonoid

AbstractThis study aimed to determine the standard amount of antioxidant content and compounds of the propolis for the standardization of propolis. For this purpose, the total flavonoids, total phenolic, CUPRAC antioxidant capacity content and the diversity of phenolic and flavonoid components of these propolis samples were found by HPLC determined at the 23 propolis samples which were collected different regions of Turkey. Beside that, the similarities and differences of these 23 provinces to each other according to their antioxidant capacities were investigated by multidimensional scaling analysis. The total flavonoid content in the propolis samples were determined between 21.28 and 152.56 mg CE/g. The total phenolic content in the propolis samples was found between 34.53 mg and 259.4 mg GAE/g. CUPRAC antioxidant capacity of the propolis samples and antioxidant range was found from 95.35 to 710.43 mg TE/g. Also, 4 flavonoid [Quercetin (min.1.12–max.4.14 mg/g), Galangin (min.0.72–max.40.79 mg/g), Apigenin (min.1.07–max.17.35 mg/g), Pinocembrin (min.1.32–max.39.92 mg/g] and 6 phenolic acid [Caffeic acid (min.1.20–max.7.6 mg/g), p-Coumaric acid (min.1.26–max.4.47 mg/g), trans-Ferulic acid (min.1.28–max.4.92 mg/g), Protocatechuic acid (1.78 mg/g), trans-Cinnamic acid (min.1.05–max.3.83 mg/g), Caffeic Acid Phenethyl Ester (CAPE) (min.1.41–max.30.15 mg/g)] components were detected as mg/g, in different ratios in propolis samples collected from different regions. The feature of this study, so far, is to have the maximum number of samples representing the Turkish propolis, and so is thought to help to national and international propolis standard workings.

scholarly journals Screening of Phenolic Compounds in Australian Grown Berries by LC-ESI-QTOF-MS/MS and Determination of Their Antioxidant Potential

Antioxidants ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 26
Author(s):  
Vigasini Subbiah ◽  
Biming Zhong ◽  
Malik A. Nawaz ◽  
Colin J. Barrow ◽  
Frank R. Dunshea ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Phenolic Acid ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Vaccinium Corymbosum ◽  
Rubus Idaeus ◽  
Antioxidant Potential ◽  
Fresh Frozen ◽  
Flavonoid Quercetin

Berries are grown worldwide with the most consumed berries being blackberries (Rubus spp.), blueberries (Vaccinium corymbosum), red raspberries (Rubus idaeus) and strawberries (Fragaria spp.). Berries are either consumed fresh, frozen, or processed into wines, juices, and jams. In recent times, researchers have focused their attention on berries due to their abundance in phenolic compounds. The current study aimed to evaluate the phenolic content and their antioxidant potential followed by characterization and quantification using LC-ESI-QTOF-MS/MS and HPLC-PDA. Blueberries were highest in TPC (2.93 ± 0.07 mg GAE/gf.w.) and TFC (70.31 ± 1.21 µg QE/gf.w.), whereas the blackberries had the highest content in TTC (11.32 ± 0.13 mg CE/gf.w.). Blueberries had the highest radical scavenging capacities for the DPPH (1.69 ± 0.09 mg AAE/gf.w.), FRAP (367.43 ± 3.09 µg AAE/gf.w.), TAC (1.47 ± 0.20 mg AAE/gf.w.) and ABTS was highest in strawberries (3.67 ± 0.14 mg AAE/gf.w.). LC-ESI-QTOF-MS/MS study identified a total of 65 compounds including 42 compounds in strawberries, 30 compounds in raspberries, 28 compounds in blueberries and 21 compounds in blackberries. The HPLC-PDA quantification observed phenolic acid (p-hydroxybenzoic) and flavonoid (quercetin-3-rhamnoside) higher in blueberries compared to other berries. Our study showed the presence of phenolic acids and provides information to be utilized as an ingredient in food, pharmaceutical and nutraceutical industries.

ChemInform Abstract: SPONTANEOUS POLYPEPTIDE FORMATION FROM AMINO ACYL ADENYLATES IN SURFACTANT AGGREGATES

1978 ◽  
Vol 9 (42) ◽  
Author(s):  
D. W. ARMSTRONG ◽  
R. SEGUIN ◽  
C. J. MCNEAL ◽  
R. D. MACFARLANE ◽  
J. H. FENDLER
Keyword(s):  
Surfactant Aggregates

Protective effects of the flavonoid quercetin in chronic nitric oxide deficient rats

2002 ◽  
Vol 20 (9) ◽  
pp. 1843-1854 ◽  
Author(s):  
Juan Duarte ◽  
Rosario Jiménez ◽  
Francisco O'Valle ◽  
Milagros Galisteo ◽  
Raquel Pérez-Palencia ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Protective Effects ◽  
Flavonoid Quercetin
Sign in / Sign up

Export Citation Format

Share Document