共查询到20条相似文献,搜索用时 31 毫秒
1.
Jarinyaporn Naowaboot Patchareewan Pannangpetch Veerapol Kukongviriyapan Bunkerd Kongyingyoes Upa kukongviriyapan 《Plant foods for human nutrition (Dordrecht, Netherlands)》2009,64(2):116-121
In Thailand, beverages containing mulberry leaf (Morus alba L.) are believed to promote good health, especially in people with diabetes. We examined the effects of long-term administration
of an ethanolic extract of mulberry leaf (MA) on blood glucose, oxidative damage, and glycation in streptozotocin-induced
diabetic rats. Daily administration of 1 g/kg MA for six weeks decreased blood glucose by 22%, which was comparable to the
effect of 4 U/kg insulin. Lipid peroxidation, measured as malondialdehyde and lipid hydroperoxide concentrations (3.50 ± 0.33
and 3.76 ± 0.18 μM, respectively) decreased significantly (P < 0.05) compared to nontreated control diabetic rats (8.19 ± 0.45 and 7.50 ± 0.46 μM, respectively). Hemoglobin A1C, a biomarker for chronic exposure to high concentration of glucose, was also significantly decreased in the MA-treated group
(6.78 ± 0.30%) in comparison to untreated group (9.02 ± 0.30%). The IC50 of in vitro antiglycation and free radical scavenging activities of MA were 16.4 ± 5.6 μg/ml and 61.7 ± 2.1 μg/ml, respectively. These
findings support that long-term administration of MA has antihyperglycemic, antioxidant and antiglycation effects in chronic
diabetic rats, which may be beneficial as food supplement for diabetics. 相似文献
2.
Beato VM Orgaz F Mansilla F Montaño A 《Plant foods for human nutrition (Dordrecht, Netherlands)》2011,66(3):218-223
The contents of total phenolic compounds, flavonoids, and phenolic acids were determined in selected garlic cultivars grown
at four locations. The total phenolic content varied from 3.4 mg gallic acid equivalents (GAE)/g of dry matter (dm) to 10.8 mg
GAE/g of dm with a mean value of 6.5 mg GAE/g of dm. The myricetin, quercetin, kaempferol, and apigenin flavonoids were not
detected in any of the samples. Caffeic acid and ferulic acid were the major phenolic acids found with mean values of 2.9 mg/kg
of dm and 2.6 mg/kg of dm, respectively. The mean contents of vanillic, p-hydroxybenzoic, and p-coumaric acids were comparable (0.4–0.8 mg/kg of dm), and the level of sinapic acid was negligible (< 0.1 mg/kg of dm). There
was a significant effect of location but an insignificant effect of genotype on contents of caffeic, vanillic, p-hydroxybenzoic, and p-coumaric acids. However, genotype but not location affected the contents of total phenolics and ferulic acid. On average,
the white garlic cultivars and Chinese garlic cultivars contained higher contents of total phenolics and ferulic acid than
the purple garlic cultivars. However, the differences in the total phenolic content between the purple and white garlic cultivars
were not significant. 相似文献
3.
Rosa Martha Perez-Gutierrez Alethia Muñiz-Ramirez Yolanda Gomez Gomez Esther Bautista Ramírez 《Plant foods for human nutrition (Dordrecht, Netherlands)》2010,65(4):350-357
The hypoglycemic effects of hexane, chloroform and methanol extracts from fruits and seeds of Byrsonima crassifolia were evaluated by oral administration to normoglycemic and streptozotocin-induced severe diabetic rats (SD). The anti-diabetic
effect was examined by blood glucose, triglycerides, lipid peroxidation, total cholesterol levels in the serum, glycogen content
of liver and skeletal muscles, superoxide dismutase (SOD), catalase (CAT), glutathione (GSH) and oxidized glutathione (GSSG)
levels. The most active extracts were obtained with hexane. Hexane and chloroform extracts from fruits and seeds of Byrsonima crassifolia increased the levels of SOD, GSH, GSSG and CAT, hepatic glycogen content, glucose-6-phosphatase (G6Pase) and the plasma insulin
levels. They also decreased glucokinase (GK) and TBAR (thiobarbituric acid assay). In conclusion, Byrsonima crassifolia possesses significant antihyperglycemic properties after 4 h of a single oral dose. It can also improve hyperlipidemia and
hyperinsulinemia in streptozotocin-induced diabetic rats. Both extracts exhibited significant inhibitory activity against
AGEs (advanced glycation end products) formation with IC50 values ranging from 94.3 to 138.7 μg/ml. Therefore, B. crassifolia can be considered as a potential safe anti-diabetic agent. 相似文献
4.
Adisakwattana S Lerdsuwankij O Poputtachai U Minipun A Suparpprom C 《Plant foods for human nutrition (Dordrecht, Netherlands)》2011,66(2):143-148
Inhibition of α-glucosidase and pancreatic α-amylase is one of the therapeutic approaches for delaying carbohydrate digestion,
resulting in reduced postprandial glucose. The aim of this study was to evaluate the phytochemical analysis and the inhibitory
effect of various cinnamon bark species against intestinal α-glucosidase and pancreatic α-amylase. The results showed that
the content of total phenolic, flavonoid, and condensed tannin ranged from 0.17 to 0.21 g gallic acid equivalent/g extract,
from 48.85 to 65.52 mg quercetin equivalent/g extract, and from 0.12 to 0.15 g catechin equivalent/g extract, respectively.
The HPLC fingerprints of each cinnamon species were established. Among cinnamon species, Thai cinnamon extract was the most
potent inhibitor against the intestinal maltase with the IC50 values of 0.58 ± 0.01 mg/ml. The findings also showed that Ceylon cinnamon was the most effective intestinal sucrase and
pancreatic α-amylase inhibitor with the IC50 values of 0.42 ± 0.02 and 1.23 ± 0.02 mg/ml, respectively. In addition, cinnamon extracts produced additive inhibition against
intestinal α-glucosidase and pancreatic α-amylase when combined with acarbose. These results suggest that cinnamon bark extracts
may be potentially useful for the control of postprandial glucose in diabetic patients through inhibition of intestinal α-glucosidase
and pancreatic α-amylase. 相似文献
5.
Apostolidis E Karayannakidis PD Kwon YI Lee CM Seeram NP 《Plant foods for human nutrition (Dordrecht, Netherlands)》2011,66(4):313-319
Ascophyllum nodosum is a brown seaweed that grows abundantly in the US Northeast coastal region. This study examined the seasonal variation of
A. nodosum in phenolic contents and subsequent antioxidant, α-glucosidase and α-amylase inhibitory activities. A. nodosum was harvested monthly and extracted in hot water and the resulting extracts were spray-dried. The results indicate a clear
seasonal variation in terms of phenolic content, with June and July being the highest (36.4 and 37 mg/g, respectively) and
May the lowest (21.8 mg/g). The antioxidant activities, in terms of 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging
activity, correlated with the phenolic contents observed (r = 0.81), with the month of July being the highest (58%) and April the lowest (26%). Similarly in terms of Trolox equivalent,
July had the highest activity (15.53 μM) and April and May the lowest (8.40 and 8.27 μM, respectively). α-glucosidase inhibitory
activity exhibited a pattern similar to the phenolic contents observed with July having the highest inhibitory activity (IC70 2.23 μg) and April the lowest (IC70 26.13 μg), resulting in an inverse correlation between IC70 values and total phenolic content (r = −0.89). Such seasonal variation is believed to be caused by temperature-related stress considering that A. nodosum is a cold water species. 相似文献
6.
Pahua-Ramos ME Ortiz-Moreno A Chamorro-Cevallos G Hernández-Navarro MD Garduño-Siciliano L Necoechea-Mondragón H Hernández-Ortega M 《Plant foods for human nutrition (Dordrecht, Netherlands)》2012,67(1):10-16
Avocado seed contains elevated levels of phenolic compounds and exhibits antioxidant properties. We investigated the effect
of Avocado Seed Flour (ASF) on the lipid levels in mice on a hyperlipidemic diet. The concentration of phenols was determined
by high-performance liquid chromatography, antioxidant activity was evaluated using the Trolox equivalent antioxidant capacity
method, and dietary fiber was measured using the Association of Official Analytical Chemists (AOAC) method. The LD50 of ASF was determined using Lorke’s method and hypolipidemic activity was evaluated in a hypercholesterolemic model in mice.
Protocatechuic acid was the main phenolic compound found in ASF, followed by kaempferide and vanillic acid. The total phenolic
content in the methanolic extract of ASF was 292.00 ± 9.81 mg gallic acid equivalents/g seed dry weight and the antioxidant
activity resulted in 173.3 μmol Trolox equivalents/g DW. In addition, a high content of dietary fiber was found (34.8%). The
oral LD50 for ASF was 1767 mg/kg body weight, and treatment with ASF significantly reduced the levels of total cholesterol, LDL-C,
and prediction of the atherogenic index. Therefore, the antioxidant activity of phenolic compounds and dietary fiber in ASF
may be responsible for the hypocholesterolemic activity of ASF in a hyperlipidemic model of mice. 相似文献
7.
Yong-Seo Park Mi-Kyung Lee Buk-Gu Heo Kyung-Sik Ham Seong-Gook Kang Ja-Yong Cho Shela Gorinstein 《Plant foods for human nutrition (Dordrecht, Netherlands)》2010,65(2):186-191
This study was conducted in order to compare the nutrient and chemical contents of two Korean teas: traditional Chungtaejeon
tea (CTJ) with that of green tea (GT). Main bioactive compounds and the antioxidant activities using four radical scavenging
assays (ABTS, CUPRAC, FRAP and DPPH) in methanol and acetone extracts of both teas were determined. It was found that the
contents of vitamin C, amino acids and total nitrogen in CTJ were lower than that of GT (p < 0.05). Caffeine, reducing sugar and chlorophyll contents in CTJ were similar to GT. Catechin (C), epicatechin (EC), and
epigallocatechin (EGC) contents were lower in CTJ than in green tea (p < 0.05), but gallocatechin (GC), epicatechin gallate (ECG), epigallocatechin gallate (EGCG) and catechin gallate (CG) showed
no significant differences between CTJ and GT (p ≥ 0.05). The contents of polyphenols, flavonoids, flavanols and tannins in
CTJ methanol were 229.30 ± 11.3 mg GAE/g dry weight (DW), 15.24 ± 0.8 mg CE/g DW, 109.10 ± 5.1 mg CE/g DW and 25.68 ± 1.2
mg CE/g DW, respectively, and significantly higher than in acetone extracts (p < 0.05). Flavonoids (quercetin and kaempferol) were higher in GT than in CTJ and myricetin was higher in CTJ (p < 0.05). Threonine and aspartic acid was lower, and glutamic acid was higher in CTJ compared with GT (p < 0.05). Free amino acid content in CTJ and GT showed no significant difference. Potassium and magnesium in CTJ were lower
compared to GT, but no significant difference was found for iron, manganese and calcium. Also, the level of the antioxidant
activity by all four used assays was significantly higher in CTJ and in methanol was higher than in acetone extracts (p < 0.05). In conclusion, traditional fermented Korean tea Chungtaejeon contains high quantities of bioactive compounds and
possesses high antioxidant activity. The contents of the bioactive compounds and the levels of antioxidant activities are
significantly higher in methanol than in acetone extracts. 3-D fluorescence and FTIR- spectroscopy showed slight differences
between the two investigated tea samples and can be used as additional tools for identification of polyphenols. Both studied
teas can be recommended as a source of bioactive compounds. 相似文献
8.
Bioavailability of Phenolic Antioxidants Associated with Dietary Fiber: Plasma Antioxidant Capacity After Acute and Long-Term Intake in Humans 总被引:1,自引:1,他引:0
Jara Pérez-Jiménez José Serrano Maria Tabernero Sara Arranz M. Elena Díaz-Rubio Luis García-Diz Isabel Goñi Fulgencio Saura-Calixto 《Plant foods for human nutrition (Dordrecht, Netherlands)》2009,64(2):102-107
Most studies on bioavailability of phenolic antioxidants are focused in foods and beverages in which they may be easily released
from the food matrix, reaching a peak in plasma antioxidant capacity 1–2 h after the intake. However, plant foods contain
significant amounts of polyphenols associated with dietary fiber. The aim of the present work was to seek the bioavailability
of total phenolic antioxidants associated with dietary fiber by measuring plasma antioxidant capacity in human volunteers.
An acute intake of 15 g of a dietary fiber rich in associated phenolic antioxidants in healthy volunteers (n = 10) increased antioxidant capacity of plasma in relation to a control group (n = 4), becoming significant 8 h after the intake. This shows that phenolic antioxidants associated with dietary fiber are
at least partially bioavailable in humans, although dietary fiber appears to delay their absorption. No significant changes
were observed after long-term intake (16 weeks, 34 subjects). 相似文献
9.
Jimenez M Guzman AP Azuara E Garcia O Mendoza MR Beristain CI 《Plant foods for human nutrition (Dordrecht, Netherlands)》2012,67(1):57-63
Porophyllum tagetoides is an annual warm-weather herb that has an intense typical smell. Its leaves are commonly used in soup preparation and traditional
medicine for treatment of inflammatory diseases. Its volatile compounds and antioxidant properties were evaluated in crude,
aqueous and ethanol leaf extract and an oil emulsion using different antioxidant assays in vitro, such as: DPPH radical scavenging activity, redox potential, polyphenol content, reducing power and optical density. A high
antioxidative activity was found when comparing leaves with stems. The crude extract from leaves showed a very high reducing
power (2.88 ± 0.20 O.D.) and DPPH radical-scavenging activity (54.63 ± 4.80%), in concordance with a major concentration of
vitamin C (23.97 ± 0.36 mg/100 g). Instead, the highest polyphenol content (264.54 ± 2.17 mg GAE/g of sample) and redox potential
(561.23 ± 0.15 mV) were found by the ethanol and aqueous extract, respectively. Aldehydes and terpenes such as nonanal, decanal,
trans-pineno, β-myrcene and D-limonene were the major volatiles found. This study suggests that Porophyllum tagetoides extracts could be used as antioxidants. 相似文献
10.
Vasil Georgiev Georgiev Jost Weber Eva-Maria Kneschke Petko Nedyalkov Denev Thomas Bley Atanas Ivanov Pavlov 《Plant foods for human nutrition (Dordrecht, Netherlands)》2010,65(2):105-111
Betalains are water-soluble plant pigments that are widely used as food colorants, and have a wide range of desirable biological
activities, including antioxidant, anti-inflammatory, hepatoprotective, anti-cancer properties. They can be produced from
various plants, notably beetroot, but betalain products obtained in this way also have some undesirable properties and are
difficult to standardize. A potentially attractive alternative is to use hairy root cultures. In the study reported here,
we found that betalain extracts obtained from hairy root cultures of the red beetroot B. vulgaris cv. Detroit Dark Red also had higher antioxidant activity than extracts obtained from mature beetroots: six-fold higher 2,2-dyphenyl-1-picrylhydrazyl
radical scavenging ability (90.7% inhibition, EC50 = 0.11 mg, vs 14.2% inhibition, EC50 = 0.70 mg) and 3.28-fold higher oxygen radical absorbance capacity (4,100 μM TE/g dry extract, vs 1,250 μM TE/g dry extract).
The high antioxidant activity of the hairy root extracts was associated with increased concentrations (more than 20-fold)
of total phenolic concomitant compounds, which may have synergistic effects with betalains. The presence of 4-hydroxybenzoic
acid, caffeic acid, catechin hydrate, and epicatechin were detected in both types of extract, but at different concentrations.
Rutin was only present at high concentration (1.096 mg.g−1 dry extract) in betalain extracts from the hairy root cultures, whereas chlorogenic acid was only detected at measurable
concentrations in extracts from intact plants. 相似文献
11.
João C. M. Barreira José Alberto Pereira M. Beatriz P. P. Oliveira Isabel C. F. R. Ferreira 《Plant foods for human nutrition (Dordrecht, Netherlands)》2010,65(1):38-43
Sugar profiles of different almond and chestnut cultivars were obtained by high-performance liquid chromatography (HPLC),
by means of a refractive index (RI) detector. A solid-liquid extraction procedure was used in defatted and dried samples.
The chromatographic separation was achieved using a Eurospher 100-5 NH2 column using an isocratic elution with acetonitrile/water (70:30, v/v) at a flow rate of 1.0 ml/min. All the compounds were separated in 16 min. The method was optimized and proved to be reproducible
and accurate. Generally, more than 95% of sugars were identified for both matrixes. Sugars profiles were quite homogeneous
for almond cultivars; sucrose was the main sugar (11.46 ± 0.14 in Marcona to 22.23 ± 0.59 in Ferragnes g/100 g of dried weight), followed by raffinose (0.71 ± 0.05 in Ferraduel to 2.11 ± 0.29 in Duro Italiano), glucose (0.42 ± 0.12 in Pegarinhos two seeded to 1.47 ± 0.19 in Ferragnes) and fructose (0.11 ± 0.02 in Pegarinhos two seeded to 0.59 ± 0.05 in Gloriette). Commercial cultivars proved to have higher sucrose contents, except in the case of Marcona. Nevertheless, chestnut cultivars revealed a high heterogeneity. Sucrose was the main sugar in Aveleira (22.05 ± 1.48), Judia (23.30 ± 0.83) and Longal (9.56 ± 0.91), while glucose was slightly prevalent in Boa Ventura (6.63 ± 0.49). The observed variance could serve for inter-cultivar discrimination. 相似文献
12.
Jastrzebski Z Tashma Z Katrich E Gorinstein S 《Plant foods for human nutrition (Dordrecht, Netherlands)》2007,62(4):145-150
Prolipid a known mixture of herbs is used as a plasma lipid lowering medicine. No side effects were registered. However, the
bioactive substances of Prolipid were not investigated. Therefore in this investigation Prolipids bioactive compounds and
antioxidant activity were studied. The contents of polyphenols and flavonoids were 19.87 ± 2.09 and 3.09 ± 0.31 mg gallic
acid equivalent GAE/g DW and 2.09 ± 0.24 and 0.57 ± 0.05 mg catechin equivalent CE/g DW in water and methanol fractions, respectively.
Anthocyanins (0.02 ± 0.001 mg/g DW) and flavanols (7.58 ± 0.81 μg CE/g DW) were found only in water fraction. The antioxidant
activity of Prolipid, as determined by four different antioxidant assays [ferric-reducing/antioxidant power (FRAP); cupric
reducing antioxidant capacity (CUPRAC); trolox equivalent antioxidant capacity (TEAC); 1, 1-diphenyl-2-picrylhydrazyl radical
(DPPH)], was higher in water than in methanol fraction. The correlation coefficients between polyphenols, flavonoids and antioxidant
activities of Prolipid water extracts with TEAC were 0.97 and 0.90, respectively. It can be concluded that the content of
polyphenol compounds in Prolipid is very high and they are the main contributors to Prolipids overall antioxidant activity.
Prolipid is widely used in human treatment without known side effects on patients and is comparable to other medicinal plants,
and as a strong antioxidant mixture could be used as a supplement to known atherosclerosis preventing diets. 相似文献
13.
Rinelli S Spadafranca A Fiorillo G Cocucci M Bertoli S Battezzati A 《Plant foods for human nutrition (Dordrecht, Netherlands)》2012,67(1):100-104
We hypothesized that fruit ingestion provides measurable amounts of salicylic acid (SA) and produces different metabolic and
inflammatory responses compared to mere fruit sugars. In a randomized-crossover study, 26 healthy subjects received a peach
shake meal (PSM) (SA: 0,06 ± 0,001 mg/100 g) and a mixed sugar meal (MSM), consisting in an aqueous solution with the same
sugars found in the peach shake. In order to control for the SA contribution from meals in the previous day, 16 subjects (Group
1) abstained from fruits and vegetables consumption the evening before trials, and 10 subjects (Group 2) maintained their
usual diet. Circulating SA, glucose, insulin, free fatty acids, and interleukin-6 were determined. Basal SA was lower in Group
1 than in Group 2 (0.09 ± 0.02 vs. 0.30 ± 0.03 μmol/l, p < 0.001), peaked at 90 min in both groups (0.18 ± 0.01 vs. 0.38 ± 0.02 μmol/l, p < 0.01) and remained above baseline (p < 0.05) up to 3 h. Glycemia increased less after PSM at 15 min (p < 0.01) with a lower average glucose excursion (p < 0.05). Insulin peaked at 45 min with both meals but decreased less rapidly with PSM. Free fatty acids decreased more (p < 0.01), and interleukin-6 increased less (p < 0.05) with PSM. Dietary fruit intake increases the concentration of SA in vivo, and provides non-nutrients capable to modulate the inflammatory and metabolic responses to carbohydrates. 相似文献
14.
Korekar G Stobdan T Arora R Yadav A Singh SB 《Plant foods for human nutrition (Dordrecht, Netherlands)》2011,66(4):376-383
Fourteen apricot genotypes grown under similar cultural practices in Trans-Himalayan Ladakh region were studied to find out
the influence of genotype on antioxidant capacity and total phenolic content (TPC) of apricot kernel. The kernels were found
to be rich in TPC ranging from 92.2 to 162.1 mg gallic acid equivalent/100 g. The free radical-scavenging activity in terms
of inhibitory concentration (IC50) ranged from 43.8 to 123.4 mg/ml and ferric reducing antioxidant potential (FRAP) from 154.1 to 243.6 FeSO4.7H2O μg/ml. A variation of 1–1.7 fold in total phenolic content, 1–2.8 fold in IC50 by 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay and 1–1.6 fold in ferric reducing antioxidant potential among the examined
kernels underlines the important role played by genetic background for determining the phenolic content and antioxidant potential
of apricot kernel. A positive significant correlation between TPC and FRAP (r = 0.671) was found. No significant correlation was found between TPC and IC50; FRAP and IC50; TPC and physical properties of kernel. Principal component analysis demonstrated that genotypic effect is more pronounced
towards TPC and total antioxidant capacity (TAC) content in apricot kernel while the contribution of seed and kernel physical
properties are not highly significant. 相似文献
15.
Juan Fernando Pío-León Gabriela López-Angulo Octavio Paredes-López Magdalena de Jesús Uribe-Beltrán Sylvia Páz Díaz-Camacho Francisco Delgado-Vargas 《Plant foods for human nutrition (Dordrecht, Netherlands)》2009,64(3):181-187
Bromelia pinguin L. is a plant native to Sinaloa, Mexico, where its fruit is used as food or as a phytotherapeutic agent. The fruits of B. pinguin were characterized and they could be considered as a functional food. These fruits show an average weight of 13.7 g and a
yellow color of high luminosity (b* = 43.2, L* = 74.5). The values for acidity (4.6%, as citric acid) and pH (3.7) of B. pinguin fruit are similar to those of citrics. The edible portion is characterized by a high content of vitamin C (126 mg/100 g),
ash (10.6 g/100 g d.w.), crude fiber (3.4 g/100 g d.w.), calcium (1290 mg/100 g d.w.), magnesium (500 mg/100 g d.w.), manganese
(2.95 mg/100 g d.w.) and it is a good source of zinc (2.8 mg/100 g d.w.). Polar fractions extracted from the pulp fruit showed
activity against several genera of human pathogenic-bacteria (Staphylococcus, Streptococcus, Enterococcus, Salmonella, Shigella, Escherichia and Pseudomonas). 相似文献
16.
Doolaege EH Raes K De Vos F Verhé R De Smet S 《Plant foods for human nutrition (Dordrecht, Netherlands)》2011,66(2):196-202
The absorption, distribution and elimination of carnosic acid, the main antioxidant found in rosemary was studied, in vivo, in rats. Therefore, carnosic acid was administrated in a single dose, intravenously (20.5 ± 4.2 mg/kg) and orally (64.3 ± 5.8 mg/kg),
to four and nine rats, respectively. Blood samples were collected at different time points, and plasma concentrations of carnosic
acid were determined using LC-MS. Furthermore, total collection of urine and feces was done during 4 h and 24 h for the intravenous
and oral administrations, respectively. After euthanizing the rats, intestinal content, liver and muscle tissue were sampled
to determine carnosic acid concentrations. The bioavailability of carnosic acid, after 360 min, was 40.1%. Traces of carnosic
acid were found in the rats intestinal content, liver and muscle tissue of abdomen and legs. The recovery of carnosic acid
in the feces, 24 h after oral administration, was 15.6 ± 8.2%. Carnosic acid is absorbed into the bloodstream after oral administration
in rats and is therefore bioavailable. It was found that carnosic acid in vivo is present in its free form and that its main elimination route is the fecal route. 相似文献
17.
To identify the potential of green leafy vegetables (GLV) as antioxidants, methanolic extracts of Amaranthus sp., Centella asiatica, Murraya koenigii and Trigonella foenum graecum were studied for their antioxidant activity in different systems at multiple concentrations. Total antioxidant activity assessed
by phosphomolybdenum method, free radical scavenging activity by 1,1-diphenly-2-picryl hydrazyl (DPPH), reducing power and
ferrous ion chelating activity were determined. The GLV were analyzed for ascorbic acid, total and β-carotene and total polyphenol
contents. The ascorbic acid, total carotene, β-carotene and total phenolic content (tannic acid equivalents) of the GLV ranged
between 15.18–101.36, 34.78–64.51, 4.23–8.84 and 150.0–387.50 mg/100 g GLV, respectively. The extracts were found to have
significantly different levels of antioxidant activities in the systems tested. The total antioxidant activity was highest
in Murraya koenigii (2,691.78 μmol of ascorbic acid/g sample) and least in Centella asiatica (623.78 μmol of ascorbic acid/g sample). The extract concentration causing 50% inhibition of DPPH (IC50) was determined (M. koenigii < C.asiatica < Amaranthus sp. < T. graecum). The maximum DPPH scavenging activity and reducing power was exhibited by Murraya koenigii. Multiple regression analysis showed that the relationship of total antioxidant activity, free radical scavenging activity,
and reducing power with polyphenol and total and β-carotene was highly significant.
Paper awarded the Young Scientist Award in Experimental Nutrition at the Young Scientist Award Session of the 39th Annual
Meet of the Nutrition Society of India, Hyderabad, India on 15–16th Dec 2007. 相似文献
18.
Adriana Schultz Moreira Laura González-Torres Raul Olivero-David Sara Bastida Juana Benedi Francisco J. Sánchez-Muniz 《Plant foods for human nutrition (Dordrecht, Netherlands)》2010,65(3):290-298
The effects of diets including restructured meats (RM) containing Wakame or Nori on total liver glutathione status, and several
antioxidant enzyme gene expressions and activities were tested. Six groups of ten male growing Wistar rats each were fed a
mix of 85% AIN-93 M diet and 15% freeze-dried RM for 35 days. The control group (C) consumed control RM, the Wakame (W) and
the Nori (N) groups, RM with 5% Wakame and 5% Nori, respectively. Animals on added cholesterol diets (CC, CW, and CN) consumed
their corresponding basal diets added with cholesterol (2%) and cholic acid (0.4%). Alga and dietary cholesterol significantly
interact (P < 0.002) influencing all enzyme expressions but not activities. The cholesterol supplement decreased most enzyme expression
and activity. W-RM vs. C-RM increased (P < 0.05) expression of GPx, GR, Mn-SOD, and Cu,Zn-SOD and decreased that of catalase. N-RM vs. C-RM increased (P < 0.05) expression of catalase and Mn-SOD. GR activity increased in W-RM rats while SOD activity increased, but that of Se-GPx
decreased in N animals. W-RM increased total and reduced glutathione and decreased the redox index. CN diet induced significantly
lower plasma cholesterol levels (P < 0.001) than the CW diet. In conclusion, Nori-RM is a hypocholesterolemic food while Wakame-RM is an antioxidant food. This
should be taken into account when including this kind of RM as potential functional foods in human. 相似文献
19.
Jing Z. Dong Da Y. Lu Y. Wang 《Plant foods for human nutrition (Dordrecht, Netherlands)》2009,64(3):199-204
Leaves of Lycium barbarum are widely used as medicine vegetables and functional tea in China. The main flavonoids present in the leaves were separated
and identified by high performance liquid chromatography (HPLC), liquid chromatography-atmospheric pressure chemical ionization
mass spectrometry (LC-(APCI) MS) and ultraviolet-visible spectra with shift additives. The predominant flavonoid was identified
as rutin. Leaves are the rutin-rich parts (16.03–16.33 mg/g). In the wild and cultivated L. barbarum fruits, contents of rutin were determined very low (0.09–1.38 mg/g). The contents of total flavonoids (21.25 mg/g) of cultivated
L. barbarum leaves were much higher than those in the wild L. barbarum leaves (17.86 mg/g), so cultivated barbarum leaves are a suitable source for medicine vegetables and functional tea. 相似文献
20.
Effects of Different Sources of Fructans on Body Weight,Blood Metabolites and Fecal Bacteria in Normal and Obese non-diabetic and Diabetic Rats 总被引:2,自引:2,他引:0
Rendón-Huerta JA Juárez-Flores B Pinos-Rodríguez JM Aguirre-Rivera JR Delgado-Portales RE 《Plant foods for human nutrition (Dordrecht, Netherlands)》2012,67(1):64-70
Fructans contribute significantly to dietary fiber with beneficial effects on gastrointestinal physiology in healthy individuals
and offer a promising approach to treating some diseases. Two experiments (Experiment 1 = rats with normal weight; Experiment
2 = obese rats) were developed to compare the effects of three fructan sources (Cichorium intybus L. Asteraceae, Helianthus tuberosus L. Asteraceae and Agave angustifolia ssp. tequilana Haw, Agavaceae) on body weight change, blood metabolites and fecal bacteria in non-diabetic (ND) and diabetic (D) rats. In
Experiment 1 total body weight gain and daily feed intake in D and ND rats decreased (P < 0.05) with supplements of fructan. Only in D rats, blood glucose concentrations, fecal Clostrodium spp. counts, and liver steatosis decreased, while blood HDL concentrations and fecal Lactobacillus spp. and Bifidobacterium spp. counts increased due to fructans. In Experiment 2, total body weight gain and feed intake in ND and D rats were also decreased by fructans. In ND rats, fructan decreased blood
glucose concentrations. In D rats, fructans from A. angustifolia ssp. tequilana decreased blood cholesterol and LDL and liver steatosis. For both ND and D rats, fecal Lactobacillus spp. and Bifidobacterium spp. counts were higher (P < 0.05) with fructan supplements. 相似文献