scholarly journals Citrus pomace fermentation with autochthonous probiotics improves its nutrient composition and antioxidant activities

LWT ◽  
2022 ◽  
pp. 113076
Author(s):  
Xi Hu ◽  
Jiarui Zeng ◽  
Fei Shen ◽  
Xuesen Xia ◽  
Xiaofei Tian ◽  
...  
2012 ◽  
Vol 17 (1) ◽  
pp. 39 ◽  
Author(s):  
Sri Purwaningsih

Beberapa komponen antioksidan dihasilkan oleh bahan pangan secara alamiah termasuk bahan dari hasil perairan. Keong Matah Merah (Cerithidea obtusa) merupakan komoditas perikanan yang biasa dikonsumsi masyarakat dan diyakini bisa digunakan sebagai obat. Tujuan penelitian ini adalah untuk menganalisis aktivitasantioksidan dan komposisi kimia dari Keong Matah Merah. Komposisi kimia Keong Matah Merah dianalisis dengan metode AOAC untuk kandungan proksimat, kandungan mineral dengan metode APHA, kandungan asam amino dengan metode AOAC . Penentuan aktivitas antioksidan dilakukan dengan metode Molyneux. Hasil penelitian menunjukkan bahwa Keong Matah Merah (Cerithidea obtusa) mempunyai kadar: air 77,5%, protein 13,8%, lemak 2,8%, dan abu 4,5%, makro mineral tertinggi natrium 283,45 mg/100 g dan terendah kalsium39,78 mg/100 g, kadar mikro mineral tertinggi selenium 39,25 mg/100 g dan terendah tembaga 0,29 mg/100 g. Kandungan asam amino esensial tertinggi isoleusin 4,82 % dan terendah arginin 0,95%, kandungan asam amino non-esensial tertinggi asam glutamat 12,08% dan terendah sistein 0,84%. Ekstrak metanol pada Keong Matah Merah mempunyai aktivitas sebagai antioksidan kuat dan mempunyai nilai IC50 58,19 ppm dengan pembanding vitamin C sebesar 3,55 ppm.Kata kunci: Keong Matah Merah, Cerithidea obtusa, gizi, antioksidanAntioxidant compounds are frequently produced by natural foods. Matah Merah Snail (Cerithidea obtusa) is one of fishery commodities which is commonly consumed by society and traditionally used for therapeutic purposes. The aim of this research was to investigate the nutrient composition and antioxidant activity of Matah Merah (C. obtusa). The nutrient compounds were analyzed using proximate contents according to AOAC method, mineral contents using APHA method, and amino acid contents using AOAC method. The results showed that Matah Merah Snail (Cerithidea obtusa) contained 77.5% of moisture, 13.8% of protein, 2.8% of fat, and 4.5% of ash. Analyses of macro- and micro-minerals revealed that the highest level of macro-minerals was sodium 283.45 mg/100 g and the lowest one was calcium 39.78 mg/100 g. The highest level of micro-minerals was selenium 39.25 mg/100 g and the lowest one was copper 0.29 mg/100 g. The highest content of essential amino acidswas isoleusin 4.82% and the lowest one was arginine 0.95%. The highest content of non-essential amino acids was glutamic acid 12.08% and the lowest one was cysteine 0.84%. Methanol extract of Matah Merah Snail (C.obtusa) displayed potential antioxidant activities with IC50 value of 58,19 ppm, with IC50 of vitamin C as positive control was 3,555 ppm.Key words: Matah Merah Snail, Cerithidea obtusa, nutrition , antioxida


2017 ◽  
Vol 87 (3-4) ◽  
pp. 191-200 ◽  
Author(s):  
Nidhal Soualeh ◽  
Aliçia Stiévenard ◽  
Elie Baudelaire ◽  
Rachid Soulimani ◽  
Jaouad Bouayed

Abstract. In this study, cytoprotective and antioxidant activities of Rosa canina (RC) and Salix alba (SA), medicinal plants, were studied on mouse primary splenocytes by comparing Controlled Differential Sieving process (CDSp), which is a novel green solvent-free process, versus a conventional technique, employing hydroethanolic extraction (HEE). Thus, preventive antioxidant activity of three plant powders of homogeneous particle sizes, 50–100 µm, 100–180 µm and 180–315 µm, dissolved directly in the cellular buffer, were compared to those of hydroethanolic (HE) extract, at 2 concentrations (250 and 500 µg/mL) in H2O2-treated spleen cells. Overall, compared to HE extract, the superfine powders, i. e., fractions < 180 µm, at the lowest concentration, resulted in greater reactive oxygen species (ROS) elimination, increased glutathione peroxidase (GPx) activity and lower malondialdehyde (MDA) production. Better antioxidant and preventive effects in pre-treated cells were found with the superfine powders for SA (i. e., 50–100 µm and 100–180 µm, both p < 0.001), and with the intermediate powder for RC (i. e., 100–180 µm, p < 0.05) versus HE extract. The activity levels of catalase (CAT) and superoxide dismutase (SOD) in pretreated splenocytes exposed to H2O2, albeit reduced, were near to those in unexposed cells, suggesting that pretreatment with the fine powders has relatively restored the normal levels of antioxidant-related enzymes. These findings supported that CDSp improved the biological activities of plants, avoiding the use of organic solvents and thus it could be a good alternative to conventional extraction techniques.


2012 ◽  
Vol 82 (2) ◽  
pp. 85-93 ◽  
Author(s):  
Y. Kim ◽  
H. Shin ◽  
S. Lee

In the present study, the nutritional quality of four grains including adlay (AD), buckwheat (BW), glutinous barley (GB), and white rice (WR) were evaluated in terms of plasma lipid parameters, gut transit time, and thickness of the aortic wall in rats. The rats were then raised for 4 weeks on the high-fat diet based on the American Institute of Nutrition-93 (AIN-93 G) diets containing 1 % cholesterol and 20 % dietary lipids. Forty male rats were divided into 4 groups and raised for 4 weeks with a diet containing one of the following grains: WR, AD, BW, or WB. The level of thiobarbituric acid-reactive substances (TBARS) in liver was shown to be higher in rats by the order of those fed WR, AD, GB, and BW. This indicates that other grains decreased oxidative stress in vivo more than WR. The superoxide dismutase, glutathione, glutathione peroxidase, and glutathione reductase levels in the AD, BW, and GB groups were significantly higher than those in the WR group (p < 0.05). Plasma lipid profiles differed significantly according to grain combination, and decreased aortic wall thickness was consistent with the finding of decreased plasma low-density lipoprotein cholesterol (LDL-C) (p < 0.05) and increased high-density lipoprotein (HDL-C) in rats fed AD, BW, and GB (p < 0.001). The antioxidant and hypolipidemic capacities of grains are quite high, especially those of adlay, buckwheat, and glutinous barley. In conclusion, this study has demonstrated that the whole grains had a cardioprotective effect. This effect was related to several mechanisms that corresponded to lowering plasma lipids, decreasing TBARS, and increasing antioxidant activities.


Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
A Śmiechowska ◽  
B Kusznierewicz ◽  
A Bartoszek ◽  
A Szumska ◽  
A Kawecka ◽  
...  

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
I Orhan ◽  
M Kartal ◽  
FS Şenol ◽  
M Abou-Asaker ◽  
B Şener

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
EJ Jeong ◽  
HJ Yang ◽  
KY Lee ◽  
HK Yang ◽  
SH Kim ◽  
...  

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