Antioxidant Evaluation and Stability of Guava (Psidium guajava Linn.) Dried Extract

Planta Medica ◽  
2006 ◽  
Vol 72 (11) ◽  
Author(s):  
S Ingkatawornwong ◽  
S Pinsuwan ◽  
A Itharat ◽  
S Sukying ◽  
J Puripattanavong
Keyword(s):  
Psidium Guajava ◽  
Antioxidant Evaluation ◽  
Dried Extract

scholarly journals COMPARISION OF ANTIOXIDANT ACTIVITY OF ACTINIDIA DELICIOSA AND PSIDIUM GUAJAVA USING FERRIC REDUCING ANTIOXIDANT POWER ASSAY METHOD

2020 ◽  
pp. 175-178
Author(s):  
CAROLINE JEBA R ◽  
INDHUJA D
Keyword(s):  
Antioxidant Activity ◽  
Room Temperature ◽  
Psidium Guajava ◽  
Actinidia Deliciosa ◽  
Assay Method ◽  
Frap Assay ◽  
Antioxidant Power ◽  
Hot Air ◽  
Ferric Reducing Antioxidant Power ◽  
Dried Extract

Objectives: Antioxidant activity was studied in naturally dried seed extract and hot air oven dried extract of Actinidia deliciosa and Psidium guajava using ferric reducing antioxidant power (FRAP) assay method. Methods: The dried powdered seed of A. deliciosa and P. guajava 10 g was dissolved in 100 ml of ethanol in four different conical flasks S1 (for naturaly dried seeds of A. deliciosa), S2 (for hot air oven-dried seeds of A. deliciosa), S3 (for naturally dried seeds of P. guajava), and S4 (for hot air oven-dried seeds of P. guajava). The extract was carried out in shaker at 120 rpm for 72 h at room temperature by mild shaking. The extract was taken out and centrifuged at 4000 rpm for 10 min, the supernatant was taken out. The supernatant was placed in a water bath at 95°C for the solvent to evaporate and stored at room temperature. Results: According to the FRAP results, P. guajava which was naturally dried and extracted has shown the highest antioxidant activity (sample 3) then followed by the samples S4, S1, and S2. The least activity is observed in the sample (S2). Conclusion: By comparing the antioxidant activity between the A. deliciosa and P. guajava with the help of FRAP assay results, P. guajava has the highest amount of vitamin C (responsible for antioxidant activity) when compared to that of the A. deliciosa.

In vitro antioxidant potential of spray-dried Psidium guajava L. leaves extracts

Planta Medica ◽  
2013 ◽  
Vol 79 (13) ◽  
Author(s):  
MR Fernandes ◽  
CR Souza ◽  
ML Martinez ◽  
WP Oliveira
Keyword(s):  
Psidium Guajava ◽  
Antioxidant Potential ◽  
Spray Dried

Anthelmintic potential of Psidium guajava in sheep

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
R Rostirolla Debiage ◽  
FM Ferreira Gonçalves ◽  
A Rodriges Pereira ◽  
RM Gonçalvez da Silva ◽  
E Yoshihara ◽  
...  
Keyword(s):  
Psidium Guajava

STUDI PERBANDINGAN EKSTRAK DAUN BAKAU (Rhizophora Mangle L) DAN EKSTRAK DAUN JAMBU BIJI (Psidium Guajava L) YANG DIGUNAKAN SEBAGAI BAHAN PENYAMAK ALAMI DALAM PERBUATAN TELUR PIDANG

2014 ◽  
Vol 3 (1) ◽  
pp. 61-70
Author(s):  
Adi Putra ◽  
Rifni Novitasari
Keyword(s):  
Rhizophora Mangle ◽  
Psidium Guajava

Penelitian tentang perbandingan ekstrak daun bakau (Rhizophora Mangle L) dan ekstrak daun jambu (Psidium Guajava L) yang digunakan sebagai bahan penyamak alami dalam pembuatan telur pindang telah dilakuakan selama Bulan Desember 2012 dengan tujuan untuk mengetahui perbandingan terbaik ekstrak daun bakau dan daun jambu biji yang digunakan sebagai bahan penyamak alami dalam pembuatan telur pindang.Penelitian ini dilakukan dengan menggunakan Rancang Acak Lengkap (RAL), dengan 4 perlakuan dan 3 x ulangan. Adapun perlakuan dalam penelitian ini adalah ; A0 (Ekstrak daun bakau 100%) ; A1 (Daun bakau 25% dan daun jambu biji 75%); A2 (Daun bakau 50% dan daun jambu biji 50%,); A3 (Daun bakau 75% dan daun jambu biji 25%)Berdasarkan hasil penelitian diketahui bahwa perlakuan A3 (Daun Bakau 75%: Daun Jambu Biji 25%) adalah perlakuan perbandingan terbaik dari hasil uji organoleptik dengan menggunakan uji hedonik dengan skor ; 3.65 untuk rasa, 3,70 untuk warna dan 3,85 untuk tekstur. dengan total mikroba pada hari ke-12 (3 x 106), kadar protein 30,24% dengan kadar air 74,58%

QUALITATIVE AND QUANTITATIVE PHYTOCHEMICAL SCREENING AND IN VITRO ANTIOXIDANT EVALUATION OF PERGULARIA DAEMIA

2018 ◽  
Vol 24 (2) ◽  
Author(s):  
GITA MISHRA ◽  
HEMESHWER KUMAR CHANDRA ◽  
NISHA SAHU ◽  
SATENDRA KUMAR NIRALA ◽  
MONIKA BHADAURIA
Keyword(s):  
Reducing Sugars ◽  
Antioxidant Properties ◽  
Phytochemical Analysis ◽  
Phytochemical Screening ◽  
Qualitative And Quantitative ◽  
The Family ◽  
Ethanolic Extracts ◽  
Antioxidant Evaluation ◽  
In Vitro Antioxidant Activity

Pergularia daemia belongs to the family Asclepiadaceae, known to have anticancer, anti-inflammatory activity. Aim of the present study was to evaluate qualitative and quantitative phytochemical and antioxidant properties of ethanolic extracts of leaf, stem and root parts of P. daemia . Preliminary phytochemical analysis and in vitro antioxidant properties were evaluated by standard methods. The qualitative phytochemical analysis of P. daemia showed presence of flavonoids, tannins, alkaloid, phytosterol, carbohydrate, phenol, saponin, glycosides, terpenoids, steroids proteins and reducing sugars. Quantitative analysis showed polyphenol, flavonoid, flavonone, flavone and flavonol in P. daemia leaves, stem and root in considerable quantity. The in vitro antioxidant activity of P. daemia clearly demonstrated that leaf, stem and root parts have prominent antioxidant properties and was effective in scavenging free radicals.

Guava (Psidium guajava L.) Fruit Coating with Gum – Arabic for Quality and Fruit Fly Control

1970 ◽  
pp. 01-04
Author(s):  
Esameldin B. M. Kabbashi, Ghada H. Abdelrahman and Nawal A. Abdlerahman
Keyword(s):  
Shelf Life ◽  
Gum Arabic ◽  
Fruit Fly ◽  
Psidium Guajava ◽  
Postharvest Quality ◽  
Guava Fruit ◽  
Fruit Shelf Life ◽  
Fly Control ◽  
And Control ◽  
Subtropical Fruit

Guava (Psidium guajava L.) is a lovely tropical and subtropical fruit that originates in Mexico, Central America, and then taken to other distant and near parts around the world. In Sudan this popular fruit is produced in orchards and household and is so profitable but yet attacked by a lot of fruit fly species of the Genera Ceratitis and Bactrocera and the result is a loss of more than 70%. This research aimed at evaluating the effect of Gum Arabic coating (GAC) in extending the shelf life of guava fruit and disinfesting it from these notorious pests. Guava fruits from Kadaro orchards, Khartoum North, were tested using seven concentrations of Gum Arabic solutions. The results reflect that 1: 4 (25%) and 1: 8 (12.5%) (GA: water) concentrations attained 56 and 40% disinfestation, respectively whereas the other lower concentrations effected corresponding results in a range from 20 – 08%. The reduction in maggots per test fruit reached upto 188% as compared to the control.  The highest concentrations (1: 4 & 1: 8) effected a sustainability of 52% in fruit firmness (FF) with an average of medium (3) FF compared to soft FF (4) in the control. The corresponding results in other lower concentrations (1: 16; 1: 32; 1: 64; 1: 72 & 1: 96) were 36, 24, 24, 20 and 16%, respectively. In addition to an average FF of 4 (soft) for all these concentrations and 5 (very soft) for all the corresponding controls. Nevertheless, the sustainability of fruit color (FC) effected by the test concentrations was 52, 44, 24, 22, 24, 20, and 24%, respectively. Regarding these results, the two highest test concentrations effected a sizeable disinfestation and control of fruit flies and a good extension of shelf life of guava in Khartoum State. These findings support using this treatment as an effective IPM tool to extend guava fruit shelf life and upgrading its postharvest quality.

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>

TOTAL POLYPHENOL CONTENT, FREE RADICAL SCAVENGING, ALPHA-GLUCOSIDASE INHIBITION CAPACITY, THE EFFICACY IN CONTROLLING BLOOD GLUCOSE OF DIABETIC RATS OF THE MIXTURE VOS EXTRACTED FROM THE LEAVES OF CLEISTOCALYX OPERCULATUS, PSIDIUM GUAJAVA AND NELUMBO NUCIFERA

2013 ◽  
pp. 50-55
Author(s):  
Tuyet Mai Truong ◽  
Thi Lam Nguyen ◽  
Lan Anh Pham ◽  
Hoang Kien Truong
Keyword(s):  
Body Weight ◽  
Blood Glucose ◽  
Radical Scavenging ◽  
Psidium Guajava ◽  
Free Radical Scavenging ◽  
Diabetic Mice ◽  
Cleistocalyx Operculatus ◽  
Prevention And Treatment ◽  
Treatment Of Diabetes ◽  
Alpha Glucosidase

Objective: Plant polyphenols have antioxidant capacity and alpha-glucosidase inhibition to supporting for prevention and treatment of diabetes. Materials and Method: Present study was conducted to determine the content of total polyphenols, free radical scavenging and alpha-glucosidase inhibition of the VOS mixture that extracted from leaves (Voi leaves - Cleistocalyx operculatus (V), Oi leaves - Psidium guajava (O), Sen leaves - Nelumbo nucifera (S)). Results: The efficacy of blood glucose controlling in diabetic mice was investigated. After 8 weeks of administration with 200 mg VOS/kg body weight and 400 mg VOS/kg body weight, VOS diabetic mice had significantly reduced blood glucose level as compared to control diabetic mice. VOS diabetic mice with 400 mg dosage are lower in blood glucose levels than that of the diabetic mice with 200 mg. Also, the significant reducing in HbA1c was observed in VOS diabetic mice as compared with control diabetic mice. Conclusion: VOS-product extracted from Cleistocalyx operculatus leaves, guava leaves, lotus leaves might be considered as a safe product and to be a potential product in the supporting of prevention and treatment of diabetes.

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