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Structure and Adsorption Properties to TVOC of orange peel Modified with KOH

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Chinese Journal of Structural Chemistry 2020年第5期39卷 873-883页

作者： CHEN Li YAN Rui XU Wen-Xiu XIONG Xiao-Ming Chemistry and Chemical Engineering Xingtai UniversityXingtai 054001China

Food waste orange peel was employed as a raw material to prepare biomass adsorbent to solve the indoor Total Volatile Organic Compounds(TVOC).The preparation process of orange peel treated with KOH was optimized by the quadratic regression orthogonal rotation,and the regression model and optimal processing conditions were *** structure of the adsorbent was characterized by BET,SEM,TEM,EDS,XRD and FTIR *** adsorption properties and desorption regeneration were *** results showed the maximal removal rate Ymax was 9.4824%when KOH concentration was 0.3 mol/L,the soaking time of KOH was 26 h and that of HCl was 2.89 *** best single factor condition was the adsorbent with 40 mesh size and 6.0 *** adsorption of modified orange peel on TVOC conformed to the Freundlich models,which was more inclined to multi-layer active site *** adsorption law followed the quasi-second-order kinetic model(R^2=0.955),indicating the adsorption was a physico-chemical mixture but controlled by physical adsorption and it was a spontaneous endothermic *** modified orange peel exposed more sites and had stronger chemical groups,which were beneficial to *** adsorbent has a significantly better TVOC removal rate than other materials at 1%level,that is,modified orange peel>diatomite>activated carbon>bamboo charcoal>macroporous *** addition,it had good recycling and regeneration capacity.

关键词： orange peel KOH modification TVOC adsorption structure

Nutraceutical potential of navel orange peel in diabetes management:The chemical profile,antioxidant,α-glucosidase inhibitory and antiglycation effects of its flavonoids

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Food Bioscience 2022年第5期49卷 1246-1253页

作者： Jun Zhang Linyan Zhang Chunling Lai Yan Liang Liangliang Gao Kumaravel Kaliaperumal Yueming Jiang National Engineering Research Centre of Navel orange Gannan Normal UniversityGanzhou341000PR China Key Laboratory of Plant Resources Conservation and Sustainable Utilization South China Botanical GardenChinese Academy of ScienceGuangzhou510650PR China

Oxidative damage,chronic hyperglycemia,and the formation of advanced glycation end products(AGEs)are important risk factors associated closely with diabetes and its *** the present study,the antidiabetic potential of navel orange peel was explored for the first time by evaluating the antioxidant,α-glucosidase inhibition,and antiglycation activities of its extracts and individual *** total,seventeen flavonoids were identified from the peel extract,of which 5-hydroxy-6,7,3′,4′-tetramethoxyflavone,didymin and sinensetin were the most potent antioxidant,α-glucosidase inhibitor,and glycation inhibitor,*** addition,the structure-activity relationship(SAR)studies of these flavonoids were performed in ***,the most potent antidiabetic extract of navel orange peel was quantitatively analyzed by *** present results support the potent application of orange peel as a nutraceutical resource for diabetes management,and might be beneficial to the orange juice industry by providing useful information on the valorization of orange peel.

关键词： α-glucosidase AGEs Flavonoids Antioxidant orange peel

Fast Determination of Essential Oil from Dried Menthol Mint and orange peel by Solvent Free Microwave Extraction Using Carbonyl Iron Powder as the Microwave Absorption Medium

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Chinese Journal of Chemistry 2006年第5期24卷 649-652页

作者：汪子明丁兰王璐封瑾李铁纯周新张寒琦 College of Chemistry Jilin University Changchun Jilin 130012 China

An improved solvent free microwave extraction, in which a kind of microwave absorption medium （carbonyl iron powder） was used, was applied to the extraction of essential oil from dried menthol mint and orange peel without addition of any solvent and pretreatment. It took much less time of extraction （30 min） than microwave-assisted hydrodistillation （90 min） and conventional hydrodistillation （180 min）. The kinds of chemical compositions in essential oil extracted by different methods were almost the same and such improved solvent free microwave extraction can be a feasible way in extraction of essential oil from dried plant materials.

关键词： solvent free microwave extraction essential oil menthol mint orange peel carbonyl iron powder

Improving oxidative stability of edible oils with nanoencapsulated orange peel extract powder during accelerated shelf life storage

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Food Bioscience 2022年第5期49卷 1213-1224页

作者： Rubiya Rashid Sajad Mohd Wani Shaziya Manzoor F.A.Masoodi Mohd Masarat Dar Department of Food Science and Technology University of KashmirSrinagarJammu and KashmirIndia Division of Food Science and Technology Sher-e-Kashmir University of Agricultural Sciences and Technology-KashmirSrinagarJammu and KashmirIndia

Nanoemulsion systems were employed to encapsulate the orange peel extract obtained from conventional maceration and novel ultrasound assisted extraction *** wall materials maltodextrin(MD),whey protein isolate(WPI)and complex maltodextrin and whey protein isolate(MD/WPI)(1:1)were used in order to enhance the nanoemulsion stability,protect the bioactive core from degradation and control the release of bioactive *** freeze drying technology was then used to obtain powder encapsulates with encapsulation efficiency and loading capacity of MD,WPI and MD/WPI as 89.3,91.2,95.6%and 95.3,94.4 and 93.1%respectively which depicts that encapsulation has taken place *** emulsions obtained were in nanoscale range with average hydrodynamic diameter as 105.0,201.82,215.12 and 298.82 for primary W/O emulsion,MD,WPI and MD/WPI stabilised emulsions *** encapsulates were then incorporated in soyabean and mustard oil at different concentration 100,200 and 300 ppm and compared with free extract and synthetic antioxidant BHT to enhance storage life by controlling the oxidative changes during accelerated shelf life storage at 60o C for 24 *** results obtained concluded that nanoencapsulated extracts performed better in prevention of oxidative indices than the free ***,nanocapsules encapsulated by MD/WPI exhibited higher protection of oils during storage than the maltodextrin and whey protein isolate.

关键词： Encapsulation orange peel Oxidative stability Waste management

Effects of a flavonoid-enriched orange peel extract against type 2 diabetes in the obese ZDF rat model

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Food Science and Human Wellness 2018年第4期7卷 244-251页

作者： Alexander Gosslau Emmanuel Zachariah Shiming Li Chi-Tang Ho Department of Science(Biology) City University of New YorkBMCCNew YorkNY 10007United States Department of Chemistry and Chemical Biology Rutgers UniversityPiscatawayNJ 08854-8087United States Oncopath Genomics Monmouth JunctionNJ 08852United States Department of Food Science Rutgers UniversityNew BrunswickNJ 08901-8520United States

Effects of an enriched orange peel extract(OPE)against type 2 diabetes(T2D)were analyzed in ZDF rats which were hyperglycemic,dyslipidemic and express pro-inflammatory *** related parameters were lowered in the lean control and metformin group as compared to ZDF vehicle *** was well tolerated and induced a decline in fasted blood glucose and increase levels of fed glucose although to a lesser degree as compared to ***,OPE did not improve glucose tolerance but showed significantly elevated glucose ***,OPE treatment caused an increase of free fatty acids in a dose-responsive manner as well as elevated levels of cholesterol and *** analysis of inflammatory mediators revealed a significant down-regulation of COX-2,ICAM-1,and TNF-˛in epididymal adipose tissue in response to OPE to a higher degree as compared to *** whole blood,IL-4 was upregulated in a dose-responsive manner as measured by *** summary,lipophilic OPE showed strong anti-inflammatory effects in adipose tissue,ambivalent effects against hyperglycemia,whereas hyperlipidemia was *** study emphasize the complexity of anti-diabetic regimen suggesting a treatment with OPE to reduce inflammation in adipose tissue in combination with antidiabetic therapeutics as promising strategy against T2D.

关键词： Type 2 diabetes orange peel Zucker diabetic fatty rats Chronic inflammation Obesity

Enhanced Cu(Ⅱ)adsorption by orange peel modified with sodium hydroxide

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Transactions of Nonferrous Metals Society of China 2010年第S1期20卷 146-152页

作者：冯宁川郭学益梁莎 School of Metallurgical Science and Engineering Central South University School of Basic Medical Science Ningxia Medical College

Copper adsorption by orange peel,which was chemically modified with sodium hydroxide,was *** adsorbent was characterized using surface area analyzer,infrared spectroscopy and scanning electron *** negative charge and zeta potentials on the adsorbent surface were *** isotherms and kinetics were obtained and the effects of solution pH value,adsorbent concentration and temperature were studied in batch *** experiments were performed to study practical applicability,and breakthrough curves were *** is well described by Langmuir and Freundlich isotherms,and kinetics is found to fit pseudo-second order type adsorption *** to Langmuir equation,the maximum adsorption capacity for Cu(Ⅱ)is 50.25 mg/g at pH value of *** results show additional chemical modification of the adsorbent by NaOH and the increased adsorption capacity.

关键词： copper orange peel adsorption kinetic isotherms

Characterization of adsorptive capacity and mechanisms on adsorption of copper, lead and zinc by modified orange peel

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Transactions of Nonferrous Metals Society of China 2012年第5期22卷 1224-1231页

作者：冯宁川郭学益中南大学冶金科学与工程学院长沙410083 宁夏医科大学基础医学院银川I 750004

A novel adsorbent was prepared by modifying orange peel with sodium hydroxide and calcium chloride. The morphological and characteristics of the adsorbent were evaluated by infrared spectroscopy （IR）, scanning electron microscopy （SEM） and N2-adsorption techniques. The adsorption behavior of Cu^2＋, Pb^2＋ and Zn^2＋ on modified orange peel （SCOP） was studied by varying parameters like pH, initial concentration of metal ions. Equilibrium was well described by Langmuir equation with the maximum adsorption capacities for Cu^2＋, Pb^2＋ and Zn^2＋ of 70.73, 209.8 and 56.18 mg/g, respectively. Based on the results obtained in batch experiments, breakthrough profiles were examined using a column packed with SCOP for the separation of small concentration of Pb^2＋ from an excess of Zn^2＋ followed by elution tests. Ion exchange with Ca^2＋ neutralizing the carboxyl groups of the pectin was found to be the predominant mechanism.

关键词： orange peel chemical modification adsorption capacity adsorption mechanism

Quantitative analysis of orange peel during tension of 6063 alloy spun tubes

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Transactions of Nonferrous Metals Society of China 2018年第5期28卷 858-865页

作者： Yang CAI Xiao-song WANG Shi-jian YUAN School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China National Key Laboratory of Precision Hot Processing of Metals Harbin Institute of Technology Harbin 150001 China

Severe surface roughening during plastic deforming of aluminum alloy parts can produce ＂orange peel＂ defects. To analyze ＂orange peel＂ of 6063 aluminum alloy tube quantificationally, the tensile tests of trapezoidal specimens were carried out. The tubes with different grain sizes were obtained by spinning and subsequent annealing heat treatment. The macroscopical behavior of surface roughening was characterized by surface roughness Ra using a laser scanning confocal microscope. The corresponding microscopic behavior was reflected by microstructures of specimens and in-situ observation using electron back-scattered diffraction（EBSD）. The obtained results show that the surface roughness increased firstly with increasing strain and then decreased slightly. There was a critical strain for aluminum alloy tube, below which ＂orange peel＂ defect would not occur. For the tube with a mean grain size of 80, 105, 130 and 175 μm, the critical strains were 10.17%, 5.74%, 3.15% and 1.62%, respectively. Meanwhile, the surface roughening behavior was produced by serious inhomogeneous deformation between grains as strain increased, and was aggravated as the grain size increased due to the larger local deformation in larger grains.

关键词： 6063 aluminum alloy surface roughening tensile deformation spinning orange peel

Analysis of surface orange peel of aluminum-alloy automobile sheet by using of EBSD and X-ray diffraction

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Engineering Sciences 2012年第6期10卷 7-11,37页

作者： Ma Mingtu Sun Zhifu Wang Zhiwen Lu Hongzhou Zhou Mingbo China Automotive Engineering Research Institute Co.Ltd. Chongqing New Materials Engineering Center China Automobile Engineering Society Key Laboratory of Advance Forging & Stamping Technology and Science Yanshan University

The formation cause of orange peel of aluminum-alloy automotive sheet after tensile deformation was analysed by using X-ray diffraction and electron back-scattered diffraction(EBSD).The test results showed that formation cause of surface orange peel after tensile deformation related to product texture and nonuniform deformation during the tensile *** grain size has significant effect on deformation uniform and texture *** grains were easy to produce nonuniform deformation and texture,which would produce surface orange peel after tensile deformation.

关键词： aluminum-alloy automotive sheet orange peel texture EBSD X-ray diffraction