Low molecular weight peptide (LMWP) was prepared from clam Paphia undulate and its antiaging effect on D-galactose-induced acute aging in rats, aged Kunming mice, ultraviolet-exposed rats, and thermally injured rats w...Low molecular weight peptide (LMWP) was prepared from clam Paphia undulate and its antiaging effect on D-galactose-induced acute aging in rats, aged Kunming mice, ultraviolet-exposed rats, and thermally injured rats was investigated. P. undulate flesh was homogenized and digested using papain under optimal conditions, then subjected to Sephadex G-25 chromatography to isolate the LMWP. Administration of LMWP significantly reversed D-galactose-induced oxidative stress by increasing the activities of glutathione peroxidase (GPx) and catalase (CAT), and by decreasing the level of malondialdehyde (MDA). This process was accompanied by increased collagen synthesis. The LMWP prevented photoaging and promoted dermis recovery and remission of elastic fiber hyperplasia. Furthermore, treatment with the LMWP helped to regenerate elastic fibers and the collagen network, increased superoxide dismutase (SOD) in the serum and significantly decreased MDA. Thermal scald-induced inflammation and edema were also relieved by the LWMP, while wound healing in skin was promoted. These results suggest that the LMWP from P. undulate could serve as a new antiaging substance in cosmetics.展开更多
Our study investigated preservation Undulate venus (</span></span><span><span><span style="font-family:""><i></span></span></span><span><sp...Our study investigated preservation Undulate venus (</span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia undulate</span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:"">)</span></span></span><span><span><span style="font-family:""> by canning via three treatments </span></span></span><span><span><span style="font-family:"">that </span></span></span><span><span><span style="font-family:"">are canned raw, canned smoked and canned cooked as a healthy product with high nutritional value. Results<span> </span>reported that edible meat of </span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia undulate</span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:""> was free from Cu, Pb and Cd as a result of washing process. There was significantly (p < 0.05) higher in moisture content of canned raw compared with other tow treatments </span></span></span><span><span><span style="font-family:"">of </span></span></span><span><span><span style="font-family:"">canned smoked and canned cooked of </span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia undulate</span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:"">, and there was significantly reduction of protein content (p < 0.05) in tow treatments </span></span></span><span><span><span style="font-family:"">of </span></span></span><span><span><span style="font-family:"">canned smoked and canned cooked compared with the canned raw. Significant different (p < 0.05) in fat content </span></span></span><span><span><span style="font-family:"">w</span></span></span><span><span><span style="font-family:"">as canned raw < canned smoked < canned cooked. On the other side</span></span></span><span><span><span style="font-family:"">,</span></span></span><span><span><span style="font-family:""> the three treatments of canned shellfish </span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia undulate</span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:"">had significant differen</span></span></span><span><span><span style="font-family:"">ce</span></span></span><span><span><span style="font-family:""> (p < 0.05) in content of ash and carbohydrates content. Canned smoked of shellfish </span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia undulate</span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:""> showed the lowest value of pH. All treatments of canned shellfish<span> </span></span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia undulate</span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:""> were rich in minerals where canned raw treatment was higher in Ca, Fe, Zn, Mg, and Mn. While canned smoked had minerals content lower than canned raw. Lightness (L*) had slightly differen</span></span></span><span><span><span style="font-family:"">ce</span></span></span><span><span><span style="font-family:""> between all treatments </span></span></span><span><span><span style="font-family:"">of </span></span></span><span><span><span style="font-family:"">canned shellfish </span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia</span></i></span></span><span><span><i><span style="font-family:""> <span>undulate</span></span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:"">. Reduction on lightness and redness was noticed at the same time in all treatments of canned shellfish<span> </span></span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia</span></i></span></span><span><span><span style="font-family:""> <i>undulate</i></span></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:"">,</span></span></span><span><span><span style="font-family:""> canned raw had</span></span></span><span><span><span style="font-family:""> the </span></span></span><span><span><span style="font-family:"">highest value of lightness (L*), and redness (a*). Canned smoked had the highest value of hardness followed by canned raw then canned cook. Slightly significant difference (p < 0.05) was noticed between three treatments in sensory properties, data showed that all panelists prefer</span></span></span><span><span><span style="font-family:"">red</span></span></span><span><span><span style="font-family:""> canned cooked than raw canned and canned smoked, degree of canned cooked was excellent.展开更多
Unfavorable fishy odour is an inevitable problem in aquatic products. In the present study, headspace solid-phase mi- croextraction gas chromatography mass spectrometry (HS-SPME-GC-MS) analysis of volatiles from unt...Unfavorable fishy odour is an inevitable problem in aquatic products. In the present study, headspace solid-phase mi- croextraction gas chromatography mass spectrometry (HS-SPME-GC-MS) analysis of volatiles from untreated samples and three deodorized samples (under the optimal conditions) ofPaphia undulata enzymatic hydrolysate revealed that the compounds contrib- uting to the distinctive odor were 1-octen-3-ol, n-hexanal, n-heptanal, 2,4-heptadienal, and 2,4-decadienal, whereas n-pentanal, n-octanal, n-octanol, benzaldehyde, 2-ethylfuran and 2-pentylfuran were the main contributors to the aromatic flavor. The deodoriz- ing effects of activated carbon (AC) adsorption, yeast extract (YE) masking and tea polyphenol (TP) treatment on a P. undulata en- zymatic hydrolysate were investigated using orthogonal experiments with sensory evaluation as the index. The following optimized deodorization conditions were obtained: AC adsorption (35 mg mL-1, 80℃, 40 rain), YE masking (7 mgmL l, 45 ℃, 30 min) and TP treatment (0.4mgmL-l, 40℃, 50min). AC adsorption effectively removed off-flavor volatile aldehydes and ketones. YE masking modified the odor profile by increasing the relative contents of aromatic compounds and decreasing the relative contents of aldehydes and ketones. The TP treatment was not effective in reducing the odor score, but it significantly reduced the relative content of alde- hydes while increasing that of alkanes. It is also notable that TP effectively suppressed trimethylamine (TMA) formation in a P. un- dulate hydrolysate solution for a period of 72 h.展开更多
基金Supported by the Knowledge Innovation Program of Chinese Academy of Sciences(No.KZCX2-EW-Q214)the Comprehensive Strategic Cooperation Programs between Guangdong Province and Chinese Academy of Sciences(Nos.2011A090100008,2009B091300018,2010B090300027)the Marine Fisheries Technology Promotion Special Program of Guangdong Province,China(No.A2009009-035(a))
文摘Low molecular weight peptide (LMWP) was prepared from clam Paphia undulate and its antiaging effect on D-galactose-induced acute aging in rats, aged Kunming mice, ultraviolet-exposed rats, and thermally injured rats was investigated. P. undulate flesh was homogenized and digested using papain under optimal conditions, then subjected to Sephadex G-25 chromatography to isolate the LMWP. Administration of LMWP significantly reversed D-galactose-induced oxidative stress by increasing the activities of glutathione peroxidase (GPx) and catalase (CAT), and by decreasing the level of malondialdehyde (MDA). This process was accompanied by increased collagen synthesis. The LMWP prevented photoaging and promoted dermis recovery and remission of elastic fiber hyperplasia. Furthermore, treatment with the LMWP helped to regenerate elastic fibers and the collagen network, increased superoxide dismutase (SOD) in the serum and significantly decreased MDA. Thermal scald-induced inflammation and edema were also relieved by the LWMP, while wound healing in skin was promoted. These results suggest that the LMWP from P. undulate could serve as a new antiaging substance in cosmetics.
文摘Our study investigated preservation Undulate venus (</span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia undulate</span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:"">)</span></span></span><span><span><span style="font-family:""> by canning via three treatments </span></span></span><span><span><span style="font-family:"">that </span></span></span><span><span><span style="font-family:"">are canned raw, canned smoked and canned cooked as a healthy product with high nutritional value. Results<span> </span>reported that edible meat of </span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia undulate</span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:""> was free from Cu, Pb and Cd as a result of washing process. There was significantly (p < 0.05) higher in moisture content of canned raw compared with other tow treatments </span></span></span><span><span><span style="font-family:"">of </span></span></span><span><span><span style="font-family:"">canned smoked and canned cooked of </span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia undulate</span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:"">, and there was significantly reduction of protein content (p < 0.05) in tow treatments </span></span></span><span><span><span style="font-family:"">of </span></span></span><span><span><span style="font-family:"">canned smoked and canned cooked compared with the canned raw. Significant different (p < 0.05) in fat content </span></span></span><span><span><span style="font-family:"">w</span></span></span><span><span><span style="font-family:"">as canned raw < canned smoked < canned cooked. On the other side</span></span></span><span><span><span style="font-family:"">,</span></span></span><span><span><span style="font-family:""> the three treatments of canned shellfish </span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia undulate</span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:"">had significant differen</span></span></span><span><span><span style="font-family:"">ce</span></span></span><span><span><span style="font-family:""> (p < 0.05) in content of ash and carbohydrates content. Canned smoked of shellfish </span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia undulate</span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:""> showed the lowest value of pH. All treatments of canned shellfish<span> </span></span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia undulate</span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:""> were rich in minerals where canned raw treatment was higher in Ca, Fe, Zn, Mg, and Mn. While canned smoked had minerals content lower than canned raw. Lightness (L*) had slightly differen</span></span></span><span><span><span style="font-family:"">ce</span></span></span><span><span><span style="font-family:""> between all treatments </span></span></span><span><span><span style="font-family:"">of </span></span></span><span><span><span style="font-family:"">canned shellfish </span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia</span></i></span></span><span><span><i><span style="font-family:""> <span>undulate</span></span></i></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:"">. Reduction on lightness and redness was noticed at the same time in all treatments of canned shellfish<span> </span></span></span></span><span><span><span style="font-family:""><i></span></span></span><span><span><i><span style="font-family:"">Paphia</span></i></span></span><span><span><span style="font-family:""> <i>undulate</i></span></span></span><span><span><i><span style="font-family:""></i></span></i></span></span><span><span><span style="font-family:"">,</span></span></span><span><span><span style="font-family:""> canned raw had</span></span></span><span><span><span style="font-family:""> the </span></span></span><span><span><span style="font-family:"">highest value of lightness (L*), and redness (a*). Canned smoked had the highest value of hardness followed by canned raw then canned cook. Slightly significant difference (p < 0.05) was noticed between three treatments in sensory properties, data showed that all panelists prefer</span></span></span><span><span><span style="font-family:"">red</span></span></span><span><span><span style="font-family:""> canned cooked than raw canned and canned smoked, degree of canned cooked was excellent.
基金supported by the Public Science and Technology Research Funds Projects of Ocean (No.201305018)the National Key Technology Research and Development Program for the 12th Five-Year Plan (No.2012BAD33B10)+3 种基金the National Natural Science Foundation of Guangdong, China (Nos. 2014A 030310351 and 2014A030310338)the Innovative Development of Marine Economy Regional Demonstration Projects of Guangdong (Nos.SZHY2012-B01-004 and GD2013-B03-001)the Science and Technology Planning Project of Guangdong Province, China (Nos.2013B 090800002 and 2015B090904003)the National Science Foundation for Young Scientists of China (No.31101271)
文摘Unfavorable fishy odour is an inevitable problem in aquatic products. In the present study, headspace solid-phase mi- croextraction gas chromatography mass spectrometry (HS-SPME-GC-MS) analysis of volatiles from untreated samples and three deodorized samples (under the optimal conditions) ofPaphia undulata enzymatic hydrolysate revealed that the compounds contrib- uting to the distinctive odor were 1-octen-3-ol, n-hexanal, n-heptanal, 2,4-heptadienal, and 2,4-decadienal, whereas n-pentanal, n-octanal, n-octanol, benzaldehyde, 2-ethylfuran and 2-pentylfuran were the main contributors to the aromatic flavor. The deodoriz- ing effects of activated carbon (AC) adsorption, yeast extract (YE) masking and tea polyphenol (TP) treatment on a P. undulata en- zymatic hydrolysate were investigated using orthogonal experiments with sensory evaluation as the index. The following optimized deodorization conditions were obtained: AC adsorption (35 mg mL-1, 80℃, 40 rain), YE masking (7 mgmL l, 45 ℃, 30 min) and TP treatment (0.4mgmL-l, 40℃, 50min). AC adsorption effectively removed off-flavor volatile aldehydes and ketones. YE masking modified the odor profile by increasing the relative contents of aromatic compounds and decreasing the relative contents of aldehydes and ketones. The TP treatment was not effective in reducing the odor score, but it significantly reduced the relative content of alde- hydes while increasing that of alkanes. It is also notable that TP effectively suppressed trimethylamine (TMA) formation in a P. un- dulate hydrolysate solution for a period of 72 h.