It is of considerable significance to develop efficient and environmentally friendly machinery lubricant additives because of the increasing depletion of petrochemical resources and severe environmental problems.Herei...It is of considerable significance to develop efficient and environmentally friendly machinery lubricant additives because of the increasing depletion of petrochemical resources and severe environmental problems.Herein,we proposed a facile strategy to synthesize a multifunctional vegetable oil-based lubricant via the lignin derivative vanillin coupled to amine and diethyl phosphite to produce a lubricating additive with both extreme pressure and antioxidant properties.Compared with pure tung oil,the lubricating and antioxidant performance of tung oil is significantly improved after adding additives.Adding the 1.0 wt%additive to the tung oil reduced the friction wear coefficient and the volume,and the oxidation induction time was much longer than pure tung oil.展开更多
BACKGROUND: Around the world more and more people suffer from acute alcoholism. The purpose of this study was to determine hepatic enzymes and oxidation/antioxidation in rats with acute alcoholism. METHODS: Rats were ...BACKGROUND: Around the world more and more people suffer from acute alcoholism. The purpose of this study was to determine hepatic enzymes and oxidation/antioxidation in rats with acute alcoholism. METHODS: Rats were randomly divided into three groups; control, low-dose alcohol, and high-dose alcohol. Each al- cohol group ( n = 12) was intravenously infused with etha- nol at a dose of 0.3 or 0.7 g/kg body weight respectively. The control group (n =11) was intravenously infused with normal saline at a dose of 0.5 g/kg body weight. Blood was collected for detection of hepatic enzymes and index of oxidation/antioxidation. RESULTS: The ratio of AST to ALT was 2.44±0.46, 2.57± 0.60 and 3.03 ±0.46 in the three groups, and the difference was significant between the control and high-dose alcohol groups (P^0.05). No significant changes were observed in the levels of serum alanine aminotransferase (ALT), aspar- tate aminotransferase (AST), total protein (Tp), albumin (Alb), alkaline phosphatase (ALP), cholinesterase (ChE), total bilirubin (TB), C-reactive protein (CRP) and amy- lase. The levels of serum nitric oxide (NO) in the 3 groups were 39.2 ±73.25 mol/L, 42.30 ±4.60 mol/L and 47.86± 4.66 mol/L, and significant difference was seen between the control group and the high-dose alcohol group (P < 0.01). No significant difference was found in the levels of serum superoxide dismutase (SOD), glutathione (GSH), malondiethylaldehyde (MDA), and CRP in the 3 groups. CONCLUSION: The ratio of AST to ALT appears to be a useful index for acute alcohol intoxication. NO is involved in the mechanism of acute alcohol intoxication.展开更多
Moxibustion at Shenque (CV 8) for two weeks increased the activity of both total antioxidation and SOD in rat plasma and gastric mucosa, decreased the content of MDA in the plasma butnot in the gastric mucosa.
Butyl hydroxyanisole(BHA) is usually blended with other synthetic antioxidants to improve the antioxidative property due to synergistic antioxidation. However, the synergistic antioxidation mechanisms of BHA with syne...Butyl hydroxyanisole(BHA) is usually blended with other synthetic antioxidants to improve the antioxidative property due to synergistic antioxidation. However, the synergistic antioxidation mechanisms of BHA with synergists have not been revealed yet. Thus, the antioxidation of BHA with butylated hydroxytoluene(BHT), tert-butylhydroquinone(TBHQ), or propyl gallate(PG) was investigated in the 2,2-azobis(2-amidino-propane) dihydrochloride oxidizing system. The contents of BHA, BHT, TBHQ,PG, and transformation products were measured by high-performance liquid chromatography. Transformation products were identified with liquid chromatography-mass spectrometry and gas chromatography–mass spectrometry. Results showed that synergistic antioxidation occurred between BHA and BHT, TBHQ, or PG. The synergistic antioxidation effect of BHA and BHT was attributed to the regeneration of BHA by BHT. Transformation products of BHA and BHT(compounds 6 and 7, dimers of BHA and BHT) had little contribution due to the relatively low content(<0.6%). The synergistic antioxidation effect of BHA and TBHQ or BHA and PG was attributed to the protective mechanism of TBHQ or PG on BHA. No transformation products were detected of BHA and TBHQ. Transformation products of BHA and PG(compounds 9 and 10, dimers of BHA and PG) had limited contribution due to the relatively low percentage(<7%). Therefore, BHA and BHT performed competitive antioxidation,while BHA and TBHQ or PG performed protective antioxidation.展开更多
Objective: To investigate cosmetic potential of Syzygium aromaticum L.(S. aromaticum L.) and to determine its antioxidant and anti-wrinkling effects. Methods: Using highperformance liquid chromatography, eugenol compo...Objective: To investigate cosmetic potential of Syzygium aromaticum L.(S. aromaticum L.) and to determine its antioxidant and anti-wrinkling effects. Methods: Using highperformance liquid chromatography, eugenol component was quantitated. The antioxidant activity of S. aromaticum L. was analyzed by 2,2-diphenyl-1-picrylhydrazyl radical scavenging and superoxide dismutase like activities. To determine cell viability, elastase and matrix metalloproteinase-1(MMP-1) activity, human dermal fibroblasts(HS68) were treated with S. aromaticum L. The inhibitory effect of S. aromaticum L. on tumor necrosis factor alpha induced MMPs expression in HS68 was analyzed by realtime-PCR. Results: The eugenol content was confirmed in S. aromaticum L. S. aromaticum L. was observed to have high 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity and superoxide dismutase like activity. S. aromaticum L. had no cytotoxicity against the HS68 and dose-dependently increased elastase inhibition. Moreover, S. aromaticum L. significantly decreased MMP-1 content and inhibited gene levels of MMP-1, MMP-2, MMP-3 and MMP-9. Conclusions: The findings suggest that S. aromaticum L. has great potential as a cosmeceutical ingredient with antioxidant and antiwrinkling effects.展开更多
OBJECTIVE To make full of resource,the bioactivity and active constituent analysis were firstly system⁃atically investigated on damask rose flower residue(DRFR).METHODS DPPH and ABTS experiments were applied to assess...OBJECTIVE To make full of resource,the bioactivity and active constituent analysis were firstly system⁃atically investigated on damask rose flower residue(DRFR).METHODS DPPH and ABTS experiments were applied to assess the antioxidant activity of DRFR.Then,column chromatography was used to purify compounds from DRFR-A,and the chemical structure was identified using nuclear magnetic resonance(NMR).The total phenolic acid content was measured by folin-ciocalteu colorimetric method and the content of gallic acid the indicator ingredient,was detected by high performance liquid chromatography(HPLC).RESULTS By DPPH and ABTS experiments,an antioxidation extract(DRFR-A)was found and displayed a high activity both on DPPH(IC50:2.760 mg·L^-1)and ABTS(IC50:2.258 mg·L^-1)compared to positive control VC.Ten compounds were isolated and identified from DRFR-A,and the most are phenolic acids.Among them,pyrogallic acid,2-phenylethyl-3,4,5-trihydroxybenzoate,p-hydroxybenzoic acid and p-hydroxy⁃phenethyl alcohol were obtained from the plant for the first time.The content of total phenolic acids and main ingredient,gallic acid,in DRFR-A was determined as 63.73%and 5.12%,respectively.CONCLUSION This study provides reliable science data and lays the foundation for the development and utilization of rose residue,and hence for the full utilization of rose resources.展开更多
The antioxidant effects of quercetin were studied in vitro and in vivo.In vitro,vitamin C was used as a positive control to evaluate the antioxidant capacity of quercetin in three aspects:scavenging free radicals,prot...The antioxidant effects of quercetin were studied in vitro and in vivo.In vitro,vitamin C was used as a positive control to evaluate the antioxidant capacity of quercetin in three aspects:scavenging free radicals,protecting biological macromolecules and the total reducing power.In vivo,a total of 240 AA broilers(1-day age)with similar body weight were randomly divided into four groups with six replicates in each group,and 10 broilers in each replicate.The four groups were fed with corn-soybean basal diet supplemented with 0.00%,0.02%,0.04%and 0.06%quercetin to study its effects on antioxidant indexes of AA broilers,and to explore the optimal dose of quercetin as a dietary additive.The results showed that quercetin scavenged superoxide anion,hydroxyl radical and 1,1-diphenyl-2-picrylhydrazyl(DPPH)in vitro,the scavenging effects of quercetin on O_(2)-and•OH first increased and then decreased with the increase of the concentrations(P<0.01),and its maximum scavenging effect was observed at concentrations of 40 and 300 mg·L^(-1).The scavenging effects of quercetin on DPPH was increased constantly with increasing concentrations.The scavenging effect of quercetin on three free radicals was DPPH>•OH>O_(2)-.The inhibition of vitelline lipoprotein peroxidation by quercetin was increased with increasing concentrations(P<0.01)and the inhibitory effect was higher than that of vitamin C.The inhibition of red blood cell hemolysis by quercetin was increased with increasing concentrations at 0.05-1.25 mg·L^(-1)(P<0.01);however,the inhibition tended to decrease when the concentration was too high(31.25 mg·L^(-1)),and the inhibitory effect was higher than that of vitamin C.The inhibition of mitochondrial expansion by quercetin was increased with increasing concentrations,according to the degree of mitochondrial expansion at 60 min,the integrity of mitochondria in the experimental groups was significantly higher than that in the model group(P<0.01).The total reducing power of quercetin was increased with increasing concentrations(P<0.01);however,the total reducing power was less than that of vitamin C.In vivo,malondialdehyde(MDA)and nitric oxide(NO)were significantly decreased with increasing quercetin(P<0.01).Quercetin supplementation had no effect on the content of lipid peroxidation(LPO)in livers(P>0.05);however,superoxide dismutase(SOD)activity was significantly increased,whereas glutathione peroxidase(GSH-Px)and catalase(CAT)activities were significantly decreased in livers with increasing quercetin(P<0.05).These results suggested that quercetin exhibited strong antioxidant effects in vitro and in vivo.展开更多
This study aims to investigate the effects of EGCG on the lipid deposition and liver anti-oxidative capacity of broilers under heat stress.One hundred and ninety-two 2-week-old broilers were divided into four groups w...This study aims to investigate the effects of EGCG on the lipid deposition and liver anti-oxidative capacity of broilers under heat stress.One hundred and ninety-two 2-week-old broilers were divided into four groups with 6 replicates per group and 8 chickens per replicate:one thermoneutral control group(28℃,TN group),which was fed the basal diet,and three cyclic high-temperature groups(35℃from 7:00 to 19:00 h;28℃from 19:00 h to 7:00 h,heat stress(HS)group),which were fed the basal diet added with EGCG at doses of 0(HS0 group),300(HS300 group),and 600 mg/kg(HS600 group),respectively.The liver metabolism and lipid deposition indices were performed at 35 d of age.The results showed that heat stress decreased the activities of superoxide dismutase(SOD)and glutathione peroxidase(GSH-Px),and the Nrf2 mRNA expression in liver,and increase significantly the levels of malondialdehyde(MDA)and the expression of LITAF,NF-KB,FAS,SREBP1 mRNA and the lipid deposition compared with TN group.EGCG(HS300 and HS600 group)increased the activities of SOD and GSH-Px and catalase(CAT),increased the Nrf2 mRNA expression,decreased the MDA contents,and reduced the lipid deposition and expression of LITAF,NF-KB,FAS and SREBP1 mRNA.In conclusion,the results of this study show that EGCG can improve liver antioxidative capacity to alleviate oxidative damage caused by heat stress.展开更多
Chinese herbal medicine additives can not only directly improve the growth performance of chickens,but also indirectly affect the growth of chickens by enhancing the antioxidant capacity,immunity and disease resistanc...Chinese herbal medicine additives can not only directly improve the growth performance of chickens,but also indirectly affect the growth of chickens by enhancing the antioxidant capacity,immunity and disease resistance of the body,and eliminating diseases and adverse factors,thereby improving the growth performance of chickens.In the context of the current national prohibition of adding antibiotics to feed,the research and application of Chinese herbal medicine additives are of practical significance to eliminate the long-term use of antibiotics as chicken feed additives and reduce the threat to the environment and human health.For this reason,the research related to the substitution of Chinese herbal medicine for antibiotics is made a brief introduction to provide a reference in research and production practice.展开更多
In search for new antioxidant agents derived from 6-azauracil, the spiro-5-(flurin-9’-yl)-6-azauracil <strong>3</strong> and their <em>N</em>,<em>N</em>-disubstituted-6-azauracils ...In search for new antioxidant agents derived from 6-azauracil, the spiro-5-(flurin-9’-yl)-6-azauracil <strong>3</strong> and their <em>N</em>,<em>N</em>-disubstituted-6-azauracils <strong>4</strong> - <strong>17</strong> have been synthesized using various methods and reaction conditions. Structure of the new synthesized compounds was deduced from elemental analysis and spectral measurements, for example IR, 1H/13C NMR and mass spectroscopy. The antioxidant evaluation of the new targets showed that the activity increases in the order of <strong>8</strong> > <strong>10</strong> > <strong>6</strong> > <strong>7</strong> > <strong>9</strong> in comparison with 2,2-Diphenyl-1-picrylhydrazyl (DPPH) and ascorbic acid as standards.展开更多
The antioxidations and their correlations with total flavones and anthocyanin contents in different black rice varieties were studied. The results indicated that the great differences in total antioxidant capacity (TA...The antioxidations and their correlations with total flavones and anthocyanin contents in different black rice varieties were studied. The results indicated that the great differences in total antioxidant capacity (TAC), scavenging free radical capacity (SFRC), total flavones and anthocyanin contents existed among 242 black rice varieties. Comparisons of TAC, SFRC, total flavones and anthocyanin contents of different black rice types showed that the differences between black rice and white rice, indica one and japonica one, and nonglutinous one and glutinous one were significant at 0.01 levels, respectively. This showed that the TAC, SFRC, total flavones and anthocyanin contents of japonica type were higher than those of indica one, and nonglutinous type were higher than glutinous one. According to the fast clustering procedure, 242 black rice varieties could be clustered into 10 clusters, 184 indica rice varieties into 10 clusters, and 58 japonica rice varieties into 6 clusters. Most significant (P<0.01) correlations existed between TAC and total flavones and anthocyanin contents, and between SFRC and total flavones and anthocyanin contents of black rice, respectively. This showed that the antioxidation of black rice was closely correlated with its active compositions of flavones and anthocyanin.展开更多
The objective of this study was to investigate the correlations between antioxidations and the contents of the total phenolics and anthocyanin in 127 accessions of black soybean. A T-test, a fast clustering procedure,...The objective of this study was to investigate the correlations between antioxidations and the contents of the total phenolics and anthocyanin in 127 accessions of black soybean. A T-test, a fast clustering procedure, and a correlation coefficient analysis were used for experimentation. The variation ranges of the total antioxidant capacity (TAC), the total phenolics, and anthocyanin contents in 127 black soybean accessions were 0.44-3.56, 7.05-74.82, and 0.22-1.87 mg g-1, respectively, displaying significant genotype differences. The major differences in TAC, the total phenolics, and the anthocyanin contents existed among various types of accessions from geographical regions. The differences between the accessions from black and yellow soybeans, spring and autumn, summer and autumn, Dongbeichun and Nanfangchun, Dongbeichun and Nanfangxia, Beifangchun and Nanfangchun, and Beifangchun and Nanfangxia were significant at 0.01 or 0.05 levels, respectively. The general tendency was that the TAC, the total phenolics, and the anthocyanin contents of Beifangchun accessions were higher than that of Dongbeichun ones, while that of Nanfangchun accessions were the worst. 127 black soybean accessions could be clustered into 6 clusters, which consisted of 3, 24, 20, 31, 37, and 12 accessions, respectively. The most significant (P < 0.01) correlations existed respectively between the TAC and the total phenolics content, and the TAC and the anthocyanin content of black soybean. The results showed that the total phenolics and anthocyanin in black soybean seed coat were the important antioxidation substances.展开更多
Scalp inflammation is a fundamental issue to many unhealthy scalp symptoms such as itching, redness, dandruff, and odor. Oxidized sebum, or specifically oxidization of the squalene component in sebum, is one of the ke...Scalp inflammation is a fundamental issue to many unhealthy scalp symptoms such as itching, redness, dandruff, and odor. Oxidized sebum, or specifically oxidization of the squalene component in sebum, is one of the key reasons causing scalp inflammation. Therefore, antioxidation of the sebum is an important way to maintain scalp health. In this study, we investigated the relationship between squalene peroxide formed and its exposure time under UVA light. Further, we found two oil-soluble antioxidants, ginger root extract and vitamin E, being effective on antioxidation of sebum, and can be potentially used as scalp care actives.展开更多
[Objective]The aim was to study the antioxidative index of the compound beverage of winter jujube and peanut meal,discuss the impact of the storage conditions on its antioxidative activity and provide theoretical basi...[Objective]The aim was to study the antioxidative index of the compound beverage of winter jujube and peanut meal,discuss the impact of the storage conditions on its antioxidative activity and provide theoretical basis for the utilization of winter jujube and peanut meal resources.[Method]A kind of compound beverage was prepared with winter jujube and peanut meal,and its antioxidative activity was detected and its best storage conditions were determined.[Result]The capacity of the compound beverage stored for 20 d to scavenge·OH,DPPH·and nitroso was the highest at freeze conditions,then followed by the refrigeration conditions,room temperature storage and sunlight.The total reducing capacity of the products was the highest under freezing conditions while the lowest under sunlight when some active components were destroyed.[Conclusion]It is the best to store the compound beverage of winter jujube and peanut meal at freeze conditions and better at the refrigeration conditions.The storage of compound beverage should avoid direct sunlight.展开更多
This article covers a method for synthesizing environmentally friendly multifunctional metal (calcium,magnesium) oleate detergents with antioxidation property.These multifunctional metal (calcium,magnesium) oleate det...This article covers a method for synthesizing environmentally friendly multifunctional metal (calcium,magnesium) oleate detergents with antioxidation property.These multifunctional metal (calcium,magnesium) oleate detergents with antioxidation property were synthesized using oil-soluble liquid antioxidants (PPIBP,PPIBTSTBP,and PPIBPDA) as reactive functional materials.These oil-soluble liquid antioxidants have the potential to be used as functional materials for application in synthesizing other kinds of substrate detergents.展开更多
Gelatin extracted from the body wall of the sea cucumber (Stichopus japonicus) was hydrolyzed with flavourzyme.Low-molecular-weight gelatin hydrolysate (LMW-GH) of 700-1700 Da was produced using an ultrafiltration mem...Gelatin extracted from the body wall of the sea cucumber (Stichopus japonicus) was hydrolyzed with flavourzyme.Low-molecular-weight gelatin hydrolysate (LMW-GH) of 700-1700 Da was produced using an ultrafiltration membrane bioreactor system.Chemiluminescence analysis revealed that LMW-GH scavenges high free radicals in a concentration-dependent manner;IC50 value for superoxide and hydroxyl radicals was 442 and 285 μg mL-1,respectively.LMW-GH exhibited excellent inhibitory characteristics against melanin synthesis and tyrosinase activity in B16 cells.Furthermore,LMW-GH notably increased intracellular glutathione (GSH),which in turn suppressed melanogenesis.LMW-GH performs antioxidation activity,holding the potential of being used as a valuable ingredient in function foods,cosmetics and pharmaceuticals or nutriceuticals.展开更多
基金Funding Statement:This work was supported by National Natural Science Foundation of China[No.31901260]Special Fund of Chinese Central Government for Basic Scientific Research Operations in Commonweal Research Institutes[No.CAFYBB2019SY037].
文摘It is of considerable significance to develop efficient and environmentally friendly machinery lubricant additives because of the increasing depletion of petrochemical resources and severe environmental problems.Herein,we proposed a facile strategy to synthesize a multifunctional vegetable oil-based lubricant via the lignin derivative vanillin coupled to amine and diethyl phosphite to produce a lubricating additive with both extreme pressure and antioxidant properties.Compared with pure tung oil,the lubricating and antioxidant performance of tung oil is significantly improved after adding additives.Adding the 1.0 wt%additive to the tung oil reduced the friction wear coefficient and the volume,and the oxidation induction time was much longer than pure tung oil.
文摘BACKGROUND: Around the world more and more people suffer from acute alcoholism. The purpose of this study was to determine hepatic enzymes and oxidation/antioxidation in rats with acute alcoholism. METHODS: Rats were randomly divided into three groups; control, low-dose alcohol, and high-dose alcohol. Each al- cohol group ( n = 12) was intravenously infused with etha- nol at a dose of 0.3 or 0.7 g/kg body weight respectively. The control group (n =11) was intravenously infused with normal saline at a dose of 0.5 g/kg body weight. Blood was collected for detection of hepatic enzymes and index of oxidation/antioxidation. RESULTS: The ratio of AST to ALT was 2.44±0.46, 2.57± 0.60 and 3.03 ±0.46 in the three groups, and the difference was significant between the control and high-dose alcohol groups (P^0.05). No significant changes were observed in the levels of serum alanine aminotransferase (ALT), aspar- tate aminotransferase (AST), total protein (Tp), albumin (Alb), alkaline phosphatase (ALP), cholinesterase (ChE), total bilirubin (TB), C-reactive protein (CRP) and amy- lase. The levels of serum nitric oxide (NO) in the 3 groups were 39.2 ±73.25 mol/L, 42.30 ±4.60 mol/L and 47.86± 4.66 mol/L, and significant difference was seen between the control group and the high-dose alcohol group (P < 0.01). No significant difference was found in the levels of serum superoxide dismutase (SOD), glutathione (GSH), malondiethylaldehyde (MDA), and CRP in the 3 groups. CONCLUSION: The ratio of AST to ALT appears to be a useful index for acute alcohol intoxication. NO is involved in the mechanism of acute alcohol intoxication.
文摘Moxibustion at Shenque (CV 8) for two weeks increased the activity of both total antioxidation and SOD in rat plasma and gastric mucosa, decreased the content of MDA in the plasma butnot in the gastric mucosa.
基金financially supported by the National Natural Science Foundation of China(32172131)the Innovative Funds Plan of Henan University of Technology(2020ZKCJ10)the Doctoral Scientific Research Startup Foundation from Henan University of Technology(2021BS016)。
文摘Butyl hydroxyanisole(BHA) is usually blended with other synthetic antioxidants to improve the antioxidative property due to synergistic antioxidation. However, the synergistic antioxidation mechanisms of BHA with synergists have not been revealed yet. Thus, the antioxidation of BHA with butylated hydroxytoluene(BHT), tert-butylhydroquinone(TBHQ), or propyl gallate(PG) was investigated in the 2,2-azobis(2-amidino-propane) dihydrochloride oxidizing system. The contents of BHA, BHT, TBHQ,PG, and transformation products were measured by high-performance liquid chromatography. Transformation products were identified with liquid chromatography-mass spectrometry and gas chromatography–mass spectrometry. Results showed that synergistic antioxidation occurred between BHA and BHT, TBHQ, or PG. The synergistic antioxidation effect of BHA and BHT was attributed to the regeneration of BHA by BHT. Transformation products of BHA and BHT(compounds 6 and 7, dimers of BHA and BHT) had little contribution due to the relatively low content(<0.6%). The synergistic antioxidation effect of BHA and TBHQ or BHA and PG was attributed to the protective mechanism of TBHQ or PG on BHA. No transformation products were detected of BHA and TBHQ. Transformation products of BHA and PG(compounds 9 and 10, dimers of BHA and PG) had limited contribution due to the relatively low percentage(<7%). Therefore, BHA and BHT performed competitive antioxidation,while BHA and TBHQ or PG performed protective antioxidation.
文摘Objective: To investigate cosmetic potential of Syzygium aromaticum L.(S. aromaticum L.) and to determine its antioxidant and anti-wrinkling effects. Methods: Using highperformance liquid chromatography, eugenol component was quantitated. The antioxidant activity of S. aromaticum L. was analyzed by 2,2-diphenyl-1-picrylhydrazyl radical scavenging and superoxide dismutase like activities. To determine cell viability, elastase and matrix metalloproteinase-1(MMP-1) activity, human dermal fibroblasts(HS68) were treated with S. aromaticum L. The inhibitory effect of S. aromaticum L. on tumor necrosis factor alpha induced MMPs expression in HS68 was analyzed by realtime-PCR. Results: The eugenol content was confirmed in S. aromaticum L. S. aromaticum L. was observed to have high 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity and superoxide dismutase like activity. S. aromaticum L. had no cytotoxicity against the HS68 and dose-dependently increased elastase inhibition. Moreover, S. aromaticum L. significantly decreased MMP-1 content and inhibited gene levels of MMP-1, MMP-2, MMP-3 and MMP-9. Conclusions: The findings suggest that S. aromaticum L. has great potential as a cosmeceutical ingredient with antioxidant and antiwrinkling effects.
基金National Natural Science Foundation of China(331/313400531021)
文摘OBJECTIVE To make full of resource,the bioactivity and active constituent analysis were firstly system⁃atically investigated on damask rose flower residue(DRFR).METHODS DPPH and ABTS experiments were applied to assess the antioxidant activity of DRFR.Then,column chromatography was used to purify compounds from DRFR-A,and the chemical structure was identified using nuclear magnetic resonance(NMR).The total phenolic acid content was measured by folin-ciocalteu colorimetric method and the content of gallic acid the indicator ingredient,was detected by high performance liquid chromatography(HPLC).RESULTS By DPPH and ABTS experiments,an antioxidation extract(DRFR-A)was found and displayed a high activity both on DPPH(IC50:2.760 mg·L^-1)and ABTS(IC50:2.258 mg·L^-1)compared to positive control VC.Ten compounds were isolated and identified from DRFR-A,and the most are phenolic acids.Among them,pyrogallic acid,2-phenylethyl-3,4,5-trihydroxybenzoate,p-hydroxybenzoic acid and p-hydroxy⁃phenethyl alcohol were obtained from the plant for the first time.The content of total phenolic acids and main ingredient,gallic acid,in DRFR-A was determined as 63.73%and 5.12%,respectively.CONCLUSION This study provides reliable science data and lays the foundation for the development and utilization of rose residue,and hence for the full utilization of rose resources.
基金Supposed by the National Natural Science Foundation of China(32072749)。
文摘The antioxidant effects of quercetin were studied in vitro and in vivo.In vitro,vitamin C was used as a positive control to evaluate the antioxidant capacity of quercetin in three aspects:scavenging free radicals,protecting biological macromolecules and the total reducing power.In vivo,a total of 240 AA broilers(1-day age)with similar body weight were randomly divided into four groups with six replicates in each group,and 10 broilers in each replicate.The four groups were fed with corn-soybean basal diet supplemented with 0.00%,0.02%,0.04%and 0.06%quercetin to study its effects on antioxidant indexes of AA broilers,and to explore the optimal dose of quercetin as a dietary additive.The results showed that quercetin scavenged superoxide anion,hydroxyl radical and 1,1-diphenyl-2-picrylhydrazyl(DPPH)in vitro,the scavenging effects of quercetin on O_(2)-and•OH first increased and then decreased with the increase of the concentrations(P<0.01),and its maximum scavenging effect was observed at concentrations of 40 and 300 mg·L^(-1).The scavenging effects of quercetin on DPPH was increased constantly with increasing concentrations.The scavenging effect of quercetin on three free radicals was DPPH>•OH>O_(2)-.The inhibition of vitelline lipoprotein peroxidation by quercetin was increased with increasing concentrations(P<0.01)and the inhibitory effect was higher than that of vitamin C.The inhibition of red blood cell hemolysis by quercetin was increased with increasing concentrations at 0.05-1.25 mg·L^(-1)(P<0.01);however,the inhibition tended to decrease when the concentration was too high(31.25 mg·L^(-1)),and the inhibitory effect was higher than that of vitamin C.The inhibition of mitochondrial expansion by quercetin was increased with increasing concentrations,according to the degree of mitochondrial expansion at 60 min,the integrity of mitochondria in the experimental groups was significantly higher than that in the model group(P<0.01).The total reducing power of quercetin was increased with increasing concentrations(P<0.01);however,the total reducing power was less than that of vitamin C.In vivo,malondialdehyde(MDA)and nitric oxide(NO)were significantly decreased with increasing quercetin(P<0.01).Quercetin supplementation had no effect on the content of lipid peroxidation(LPO)in livers(P>0.05);however,superoxide dismutase(SOD)activity was significantly increased,whereas glutathione peroxidase(GSH-Px)and catalase(CAT)activities were significantly decreased in livers with increasing quercetin(P<0.05).These results suggested that quercetin exhibited strong antioxidant effects in vitro and in vivo.
文摘This study aims to investigate the effects of EGCG on the lipid deposition and liver anti-oxidative capacity of broilers under heat stress.One hundred and ninety-two 2-week-old broilers were divided into four groups with 6 replicates per group and 8 chickens per replicate:one thermoneutral control group(28℃,TN group),which was fed the basal diet,and three cyclic high-temperature groups(35℃from 7:00 to 19:00 h;28℃from 19:00 h to 7:00 h,heat stress(HS)group),which were fed the basal diet added with EGCG at doses of 0(HS0 group),300(HS300 group),and 600 mg/kg(HS600 group),respectively.The liver metabolism and lipid deposition indices were performed at 35 d of age.The results showed that heat stress decreased the activities of superoxide dismutase(SOD)and glutathione peroxidase(GSH-Px),and the Nrf2 mRNA expression in liver,and increase significantly the levels of malondialdehyde(MDA)and the expression of LITAF,NF-KB,FAS,SREBP1 mRNA and the lipid deposition compared with TN group.EGCG(HS300 and HS600 group)increased the activities of SOD and GSH-Px and catalase(CAT),increased the Nrf2 mRNA expression,decreased the MDA contents,and reduced the lipid deposition and expression of LITAF,NF-KB,FAS and SREBP1 mRNA.In conclusion,the results of this study show that EGCG can improve liver antioxidative capacity to alleviate oxidative damage caused by heat stress.
基金Supported by Guangxi Innovation Team Construction Project of National Modern Agricultural Industrial Technology System(nycytxgxcxtd-19)Guangxi Agricultural Science and Technology Self Financing Project(Z2022114)。
文摘Chinese herbal medicine additives can not only directly improve the growth performance of chickens,but also indirectly affect the growth of chickens by enhancing the antioxidant capacity,immunity and disease resistance of the body,and eliminating diseases and adverse factors,thereby improving the growth performance of chickens.In the context of the current national prohibition of adding antibiotics to feed,the research and application of Chinese herbal medicine additives are of practical significance to eliminate the long-term use of antibiotics as chicken feed additives and reduce the threat to the environment and human health.For this reason,the research related to the substitution of Chinese herbal medicine for antibiotics is made a brief introduction to provide a reference in research and production practice.
文摘In search for new antioxidant agents derived from 6-azauracil, the spiro-5-(flurin-9’-yl)-6-azauracil <strong>3</strong> and their <em>N</em>,<em>N</em>-disubstituted-6-azauracils <strong>4</strong> - <strong>17</strong> have been synthesized using various methods and reaction conditions. Structure of the new synthesized compounds was deduced from elemental analysis and spectral measurements, for example IR, 1H/13C NMR and mass spectroscopy. The antioxidant evaluation of the new targets showed that the activity increases in the order of <strong>8</strong> > <strong>10</strong> > <strong>6</strong> > <strong>7</strong> > <strong>9</strong> in comparison with 2,2-Diphenyl-1-picrylhydrazyl (DPPH) and ascorbic acid as standards.
基金This work was supported by the National Natural Science Foundation of China(39870537 and 39900087)
文摘The antioxidations and their correlations with total flavones and anthocyanin contents in different black rice varieties were studied. The results indicated that the great differences in total antioxidant capacity (TAC), scavenging free radical capacity (SFRC), total flavones and anthocyanin contents existed among 242 black rice varieties. Comparisons of TAC, SFRC, total flavones and anthocyanin contents of different black rice types showed that the differences between black rice and white rice, indica one and japonica one, and nonglutinous one and glutinous one were significant at 0.01 levels, respectively. This showed that the TAC, SFRC, total flavones and anthocyanin contents of japonica type were higher than those of indica one, and nonglutinous type were higher than glutinous one. According to the fast clustering procedure, 242 black rice varieties could be clustered into 10 clusters, 184 indica rice varieties into 10 clusters, and 58 japonica rice varieties into 6 clusters. Most significant (P<0.01) correlations existed between TAC and total flavones and anthocyanin contents, and between SFRC and total flavones and anthocyanin contents of black rice, respectively. This showed that the antioxidation of black rice was closely correlated with its active compositions of flavones and anthocyanin.
基金This work was supported by the National Natural Science Foundation of China （30200171）.
文摘The objective of this study was to investigate the correlations between antioxidations and the contents of the total phenolics and anthocyanin in 127 accessions of black soybean. A T-test, a fast clustering procedure, and a correlation coefficient analysis were used for experimentation. The variation ranges of the total antioxidant capacity (TAC), the total phenolics, and anthocyanin contents in 127 black soybean accessions were 0.44-3.56, 7.05-74.82, and 0.22-1.87 mg g-1, respectively, displaying significant genotype differences. The major differences in TAC, the total phenolics, and the anthocyanin contents existed among various types of accessions from geographical regions. The differences between the accessions from black and yellow soybeans, spring and autumn, summer and autumn, Dongbeichun and Nanfangchun, Dongbeichun and Nanfangxia, Beifangchun and Nanfangchun, and Beifangchun and Nanfangxia were significant at 0.01 or 0.05 levels, respectively. The general tendency was that the TAC, the total phenolics, and the anthocyanin contents of Beifangchun accessions were higher than that of Dongbeichun ones, while that of Nanfangchun accessions were the worst. 127 black soybean accessions could be clustered into 6 clusters, which consisted of 3, 24, 20, 31, 37, and 12 accessions, respectively. The most significant (P < 0.01) correlations existed respectively between the TAC and the total phenolics content, and the TAC and the anthocyanin content of black soybean. The results showed that the total phenolics and anthocyanin in black soybean seed coat were the important antioxidation substances.
文摘Scalp inflammation is a fundamental issue to many unhealthy scalp symptoms such as itching, redness, dandruff, and odor. Oxidized sebum, or specifically oxidization of the squalene component in sebum, is one of the key reasons causing scalp inflammation. Therefore, antioxidation of the sebum is an important way to maintain scalp health. In this study, we investigated the relationship between squalene peroxide formed and its exposure time under UVA light. Further, we found two oil-soluble antioxidants, ginger root extract and vitamin E, being effective on antioxidation of sebum, and can be potentially used as scalp care actives.
文摘[Objective]The aim was to study the antioxidative index of the compound beverage of winter jujube and peanut meal,discuss the impact of the storage conditions on its antioxidative activity and provide theoretical basis for the utilization of winter jujube and peanut meal resources.[Method]A kind of compound beverage was prepared with winter jujube and peanut meal,and its antioxidative activity was detected and its best storage conditions were determined.[Result]The capacity of the compound beverage stored for 20 d to scavenge·OH,DPPH·and nitroso was the highest at freeze conditions,then followed by the refrigeration conditions,room temperature storage and sunlight.The total reducing capacity of the products was the highest under freezing conditions while the lowest under sunlight when some active components were destroyed.[Conclusion]It is the best to store the compound beverage of winter jujube and peanut meal at freeze conditions and better at the refrigeration conditions.The storage of compound beverage should avoid direct sunlight.
文摘This article covers a method for synthesizing environmentally friendly multifunctional metal (calcium,magnesium) oleate detergents with antioxidation property.These multifunctional metal (calcium,magnesium) oleate detergents with antioxidation property were synthesized using oil-soluble liquid antioxidants (PPIBP,PPIBTSTBP,and PPIBPDA) as reactive functional materials.These oil-soluble liquid antioxidants have the potential to be used as functional materials for application in synthesizing other kinds of substrate detergents.
基金supported by the National High-Tech Research and Development Project of China (No.2007AA091805)National Natural Science Foundation of China (Nos.30871944 and 30972284)National Key Technology Research and Development Program of China (No.2008BAD94B05)
文摘Gelatin extracted from the body wall of the sea cucumber (Stichopus japonicus) was hydrolyzed with flavourzyme.Low-molecular-weight gelatin hydrolysate (LMW-GH) of 700-1700 Da was produced using an ultrafiltration membrane bioreactor system.Chemiluminescence analysis revealed that LMW-GH scavenges high free radicals in a concentration-dependent manner;IC50 value for superoxide and hydroxyl radicals was 442 and 285 μg mL-1,respectively.LMW-GH exhibited excellent inhibitory characteristics against melanin synthesis and tyrosinase activity in B16 cells.Furthermore,LMW-GH notably increased intracellular glutathione (GSH),which in turn suppressed melanogenesis.LMW-GH performs antioxidation activity,holding the potential of being used as a valuable ingredient in function foods,cosmetics and pharmaceuticals or nutriceuticals.
