Authentication email has already been sent, please check your email box: and activate it as soon as possible.
You can login to My Profile and manage your email alerts.
If you haven’t received the email, please:
|
|
There are 3 papers published in subject: since this site started. |
Results per page: |
Select Subject |
Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
1. Optimization of Supercritical extraction process for Perilla essential Oil | |||
Zhang Meiping,Shan Yongjie,Shen Zhenguo,Li Jiancheng,Zhang Zetao | |||
Food Science and Technology 28 June 2019 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:The essential oil of perilla was extracted by supercritical carbon dioxide extraction with perilla as raw material. On the basis of single factor experiment, the optimum conditions for extracting perilla essential oil were obtained.The optimum process parameters are as follows:The perilla seeds were crushed to 50m 100 mesh; supercritical extraction temperature: 45~55℃;extraction pressure: 305Mpa.Extractive time: 4h;refined separation pressureI: 89Mpa.separation pressureII: 5~6.5Mpa. First-order molecular distillation dehydration,deodorization: distilled I temperature: 60~90C, distillation I vacuum: 500~5000Pa, Flow rate: 200~400g/h,scraper speed: 250~350r/min;second order molecular distillation deacidification: distillation II temperature: 150~170℃, distillation II vacuum degree: 5~20 Pa, built-in condensation temperature: 30~60℃, flow rate: 200~400 g/h, scraper speed: 250~350 r/min; freezing dewaxing: freezing temperature: -5~0℃, freezing time: 16~12h. Extraction rate > 39%. | |||
TO cite this article:Zhang Meiping,Shan Yongjie,Shen Zhenguo, et al. Optimization of Supercritical extraction process for Perilla essential Oil[OL].[28 June 2019] http://en.paper.edu.cn/en_releasepaper/content/4749295 |
2. Lipase-catalyzed synthesis and the lipid metabolic effect of phytosterol esters | |||
Pang Min,Zheng Haijie,Jiang Shaotong | |||
Food Science and Technology 17 November 2015 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:In this paper, the esterifications of phytosterol with oleic acid catalyzed by Candida rugosa lipase in organic solvent were studied. The esterification conditions (temperature, substrate molar ratio, reaction time and catalyst amount) were optimized by response surface methodology (RSM). The phytoserol linoleic acid ester was also prepared via lipase-catalyzed. The lipid metabolic effect of equivalent intakes of phytoserol oleic/linoleic acid esters and that of different intakes of the same ester were compared. The results demonstrated that the highest phytoserol oleic acid ester esterification degree of 77.43% was obtained under the optimized conditions: temperature of 41℃, reaction time of 19h, substrate molar ratio (oleic acid: phytosterol) of 2.4:1 and catalyst amount of 7%. The chemical structure of phytoserol oleic acid ester was confirmed by FT-IR and GC-MS. The prepared phytosterol esters decreased significantly TC, LDL-C, LDL-C/HDL-C, ApoAⅠ, ApoAⅠ/ApoB in serum and liver weight, HI, hepatic TC, hepatic TG, while they also increased significantly HDL-C and ApoB in serum. No significant changes were found in the concentrations of TG. In contrast, linoleic acid ester could have a advantage effect on cholesterol-lowering and antioxidant capacity over oleic acid ester. | |||
TO cite this article:Pang Min,Zheng Haijie,Jiang Shaotong. Lipase-catalyzed synthesis and the lipid metabolic effect of phytosterol esters[OL].[17 November 2015] http://en.paper.edu.cn/en_releasepaper/content/4662571 |
3. Influence of ultrasounic treatment on the antioxidant activity of ovalbumin | |||
XIE Huan,TU Zongcai,WANG Hui,HUANG Tao | |||
Food Science and Technology 13 May 2015 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:Effects of ultrasonic treatment on antioxidant activity of ovalbumin (OVA) were evaluated by analysis of DPPH radical-scavenging activity, SDS-PAGE, SEM, and circular dichroism. The antioxidant activity of OVA was found to be increased significantly by ultrasonic treatment. The reducing power was gradually increased in accordance with the increase of ultrasonic intensity (from 0.06 to 0.14). The DPPH radical-scavenging activity was enhanced apparently and reached maximum at the intensity level of 14.91 W/cm2 (from 12.0% to 20.9%). The molecular weights of OVA remained unaffected while the size of OVA crystals decreased reflected by SEM images. CD spectra indicated that ultrasonic treatment altered the secondary structure of the OVA. | |||
TO cite this article:XIE Huan,TU Zongcai,WANG Hui, et al. Influence of ultrasounic treatment on the antioxidant activity of ovalbumin[OL].[13 May 2015] http://en.paper.edu.cn/en_releasepaper/content/4643281 |
Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
|
Results per page: |
About Sciencepaper Online | Privacy Policy | Terms & Conditions | Contact Us
© 2003-2012 Sciencepaper Online. unless otherwise stated