scholarly journals PERSENTASE TOTAL AKTIVITAS ANTIOKSIDAN DARK CHOCOLATE DAN MILK CHOCOLATE SECARA SPEKTROFOTOMETRI

2017 ◽  
Vol 2 (1) ◽  
pp. 70
Author(s):  
Lany Nurhayati ◽  
Supriyono Eko Wardoyo ◽  
Rika Rosita
Keyword(s):  
Free Radical ◽  
Vitamin E ◽  
Vitamin C ◽  
Total Activity ◽  
Premature Aging ◽  
Dark Chocolate ◽  
Chocolate Milk ◽  
Milk Chocolate ◽  
Stable Free Radical ◽  
Antioxidant Compound

Percentage Total  Activities of Antioxidant of Dark Chocolate and Milk Chocolate Using Spectrofotometric          Chocolate is loaded with various properties, one of them as an antioxidant because it contains katetin, polyphenols, flavonoids that can prevent premature aging. The content of antioxidants in chocolate was varied, dark chocolate (DC) of at least 70 %, while milk chocolate (MC) is was lower. The compound of 1,1-diphenyl-2-picrylhydrazyl (DPPH) was a stable free radical compounds that would neutralize each other if treated with antioxidant compound. Percentage of total activity was calculated by the reaction between DPPH compounds and chocolate spectrophotometrically at λ 520nm. The results showed that the DC brand A was 59.19 % , 17 : brand B 16 % and brand C 8.80 % , while the MC was 11, 07 % brand A, brand B 7, 00 %  and brands C 5.84 %. Comparison of DC percentages was higher than MC because the DC contains catechins, riboflavon, vitamin E and vitamin C or minerals Mg and Cu that reacted with DPPH, so that DC could be used as one source of antioxidants.Keywords : antioxidants, dark chocolate, milk chocolate, DPPH . ABSTRAK          Cokelat sarat dengan berbagai macam khasiat,  salah satunya sebagai antioksidan karena mengadung katetin, polifenol, flavonoid yang dapat mencegah penuaan dini. Kandungan antioksidan dalam coklat bervariasi Dark chocolate (DC) minimal 70% sedangkan Milk chocolate (MC) lebih rendah. Senyawa 1,1-diphenyl-2-picrylhydrazyl (DPPH) merupakan senyawa radikal bebas stabil yang akan saling menetralkan jika direaksikan dengan senyawaan antioksidan. Persentase total aktifitas dihitung melalui reaksi antara senyawa DPPH dengan cokelat secara spektrofotometri pada λ 520nm. Hasil penelitian menunjukkan bahwa DC merk A sebesar 59.19%, merk B 17.16%, dan merk C 8.80%, sedangkan MC merk A sebesar 11.07%, merk B 7.00%, dan merk C 5.84%. Perbandingan persentase DC lebih tinggi dibanding MC karena DC mengandung katekin, riboflavon, vitamin E, dan vitamin C, serta mineral Mg dan Cu yang berekasi dengan DPPH, sehingga DC dapat dijadikan sebagai salah satu sumber antioksidan.Kata kunci : antioksidan, dark chocolate, milk chocolate, DPPH.

scholarly journals Pengaruh Pemberian Antioksidan Vitamin C Dan E Terhadap Konsentrasi Spermatozoa Mencit (Mus Musculus) Yang Dipapar Asap Rokok

2017 ◽  
Vol 5 (1) ◽  
pp. 26
Author(s):  
Ervina Wati Harahap ◽  
Normalina Sandora ◽  
Winarto Winarto
Keyword(s):  
Reactive Oxygen Species ◽  
Free Radical ◽  
Vitamin E ◽  
Vitamin C ◽  
Male Infertility ◽  
Research Design ◽  
Mus Musculus ◽  
Sperm Count ◽  
Control Group ◽  
Oxygen Species

Free radical that are released in cigarette smoke, believed to play an important role in male infertility. The free radicalproduces Reactive Oxygen Species (ROS) that is found increased in male smokers. ROS is one of the free radicalscomponent can be neutralized by vitamin C and E as an antioxidant. This study using those agents to the fifteen minuteshalf piece cigarette to expose mice and count their sperm as the fertilility parameter. The research design used was posttest-only control group with twenty mice were divided into five groups. A group of no smoke exposed was categorizedas a baseline control, the exposed groups were consisted of one group without antioxidant, one group with vitamin Ctreatment, a group of vitamin E treatment and at last the combination of vitamin C and E. All groups were treatedfor fourteen days. The results were analyzed using oneway ANOVA with p<0.05. It is obviously proven that thecombination of vitamin C and vitamin E treatment on the usual dose gave the highest sperm count compared to othergroups.

scholarly journals IN VITRO ANTIOXIDANT AND FREE RADICAL SCAVENGING POTENTIAL OF METHANOLIC EXTRACTS OF UVARIA CHAMAE LEAVES AND ROOTS

2019 ◽  
Vol 11 (1) ◽  
pp. 67
Author(s):  
Nwokolo Lorreta Nwakaego ◽  
Onyekwelu Kenechukwu Chibuike ◽  
Ene Martin Chukwugekwu ◽  
Adilieje Chioma Marylyn ◽  
Ezechukwu Ifunanya Ngozi ◽  
...  
Keyword(s):  
Free Radical ◽  
Vitamin E ◽  
Vitamin A ◽  
Vitamin C ◽  
Leaf Extract ◽  
Superoxide Radical ◽  
Radical Scavenging ◽  
Root Extract ◽  
Leaves And Roots

Objective: This study investigated the in vitro antioxidant and free radical potentials of methanol extracts of Uvaria chamae leaves and roots.Methods: Fresh Uvaria chamae leaves and roots were air dried, pulverized and extracted using methanol. Phytochemical, total phenolic, flavonoids, antioxidant and tannin contents, DPPH, hydroxyl, and superoxide radical scavenging properties of the extracts were determined using standard methods.Results: In vitro antioxidant potentials revealed that methanol extract of Uvaria chamae leaves contains vitamin A (4871±79.21 I. U) and vitamin C (1.72±0.02%) while the root extract contains vitamin A (673.28±0.00I. U) and vitamin C (1.66±0.01%). Both extracts had equal contents of vitamin E (8.83±0.04 mg/100g). The leaf extract scavenged 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) in a concentration dependent manner with the correlation coefficient (R2) of 0.839 and effective concentration (EC50) of 31.19 µg/ml, while the root extract scavenged DPPH with R2 of0.778 and EC50 of 14.00 µg/ml. The leaf and root extracts scavenged superoxide radical and hydroxyl radical with EC50 of 5.93 µg/ml and 719.45 µg/ml; 107.89 µg/ml and 912.01 µg/ml respectively compared to the EC50 of ascorbic standard (30.27 µg/ml) and EC50 of vitamin E standard (106.66µg/ml) respectively. The leaf extract showed significantly higher (p<0.05) anti radical power (ARP) of superoxide (0.17) compared to the root extract (0.0014) and the root extract showed significantly higher (p<0.05) ARP of DPPH (0.071) compared to the leaf extract (0.032).Conclusion: The leaves and roots of Uvaria chamae are rich in natural antioxidants that can be exploited in the treatment of diseases related to oxidative stress.

The scavenging capacity and synergistic effects of lycopene, vitamin E, vitamin C, and β-carotene mixtures on the DPPH free radical

LWT ◽  
2008 ◽  
Vol 41 (7) ◽  
pp. 1344-1349 ◽  
Author(s):  
Donghong Liu ◽  
John Shi ◽  
Alejandra Colina Ibarra ◽  
Yukio Kakuda ◽  
Sophia Jun Xue
Keyword(s):  
Free Radical ◽  
Vitamin E ◽  
Vitamin C ◽  
Synergistic Effects ◽  
Scavenging Capacity ◽  
Β Carotene

Preventive Effects of β-Thujaplicin Against UVB-Induced MMP-1 and MMP-3 mRNA Expressions in Skin Fibroblasts

2012 ◽  
Vol 40 (02) ◽  
pp. 387-398 ◽  
Author(s):  
Jong Yuh Cherng ◽  
Li Yin Chen ◽  
Mei Fen Shih
Keyword(s):  
Gene Expression ◽  
Vitamin E ◽  
Vitamin C ◽  
Human Skin ◽  
Antimicrobial Activities ◽  
Skin Fibroblasts ◽  
Premature Aging ◽  
Tissue Inhibitor Of Metalloproteinase ◽  
Dependent Manner ◽  
Skin Damage

Solar UV radiation damages human skin by affecting skin tone and resiliency and leads to premature aging (photoaging). The skin damage is caused by the activation of the AP-1 transcription factor, which increases matrix metalloproteinase (MMP) expression and collagen degradation. An increase of interleukin (IL)-6 is also correlated with the activation of MMP-1 expression. β-thujaplicin has shown both acaricidal and antimicrobial activities. Also, β-thujaplicin has been shown to be protective against apoptosis due to the oxidative effects of UV irradiation. However, the effect of β-thujaplicin on UVB-induced MMPs had not been investigated. In this study, after UVB exposure, MMP-1 and IL-6 production in human skin fibroblasts was examined in the presence of β-thujaplicin, vitamin C, and vitamin E. The expression of MMP-1, MMP-3, tissue inhibitor of metalloproteinase (TIMP-1, TIMP-3) and procollagen mRNA was also investigated. Results showed that UVB-induced MMP-1 production was suppressed by the β-thujaplicin treatment in a dose-dependent manner, but not by vitamin C and vitamin E. β-thujaplicin also prevented the up-regulation of MMP-1 and MMP-3 mRNA. Moreover, the UVB-suppressed procollagen gene expression was restored to normal by β-thujaplicin. Neither UVB nor β-thujaplicin affected the mRNA expression of TIMP-1 and TIMP-3. The IL-6 production induced by UVB was lower in β-thujaplicin treated fibroblasts than in the controls. In conclusion, this study shows the capability of β-thujaplicin in preventing MMP-1 production due to UVB irradiation via inhibition of MMP gene expression. Importantly, the UVB-suppressed procollagen gene expression can be restored to normal by β-thujaplicin. These findings indicate that β-thujaplicin is a promising and potent agent to inhibit UVB-induced MMP-1 and MMP-3 gene expression in skin fibroblasts.

scholarly journals Free radicals and vitamin antioxidants in health and lung diseases

2015 ◽  
Vol 3 (3) ◽  
pp. 43-52
Author(s):  
Narayan Gautam
Keyword(s):  
Free Radicals ◽  
Free Radical ◽  
Vitamin E ◽  
Adjuvant Therapy ◽  
Vitamin C ◽  
Lung Diseases ◽  
Fruits And Vegetables ◽  
Daily Basis ◽  
Antioxidant Vitamin ◽  
The Impact

Several lung diseases have undergone oxidative stress due to free radical insult. Consequently, antioxidant vitamin C and vitamin E play important role in defense against cellular injury by scavenging free radicals. This article reviews the potential mechanism of free radicals generation and vitamin antioxidant defense to link amongst various lung diseases. One of the manifestations of free radical mediated process is lipid peroxidation subsequently producing malondialdehyde (MDA) in these patients. Supplementation of vitamin C and vitamin E as an adjuvant therapy as well as high intake of fresh fruits and vegetables appear to have a beneficial effect on lung health. Moreover, their consumption should be recommended on a daily basis. Further studies are needed to assess the impact of antioxidants as an adjuvant therapy in patients with lung diseases.

Nutritional Antioxidants as Therapeutic and Preventive Modalities in Exercise-Induced Muscle Damage

1999 ◽  
Vol 24 (3) ◽  
pp. 249-266 ◽  
Author(s):  
Allan H. Goldfarb
Keyword(s):  
Oxidative Stress ◽  
Free Radicals ◽  
Free Radical ◽  
Vitamin E ◽  
Vitamin C ◽  
Muscle Damage ◽  
Antioxidant Properties ◽  
Beta Carotene ◽  
Free Radical Damage ◽  
Exercise Induced

Several mechanisms have been forwarded to explain the etiology of exercise-induced muscle damage. Free-radical mediated processes appear to be an important component of the inflammatory mediated response. Free radicals have also been demonstrated to be a contributing factor in the loss of calcium homeostasis within the cell. Therefore, one of the proposed treatments for preventing or reducing the extent of this damage is the intervention of free-radical mediated processes. Antioxidants are agents that typically work to prevent free-radical mediated alterations within cells by quenching free radicals. The traditional dietary antioxidants most commonly investigated to inhibit free-radical damage are vitamin E, vitamin C, and beta carotene. Other nutritional agents have also been noted to posses antioxidant properties. Isoflavonoids and some phytochemicals have been proposed to contain antioxidant properties. This paper briefly reviews some aspects of these agents and their role, either proven or proposed, in the prevention of oxidative stress and muscle damage. Key words: vitamin E, vitamin C, beta carotene, genistein, oxidative stress

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