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Chemical peels

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https://www.readbyqxmd.com/read/29335513/optimal-ranges-of-variables-for-an-effective-adsorption-of-lead-ii-by-the-agricultural-waste-pomelo-citrus-grandis-peels-using-doehlert-designs
#1
Xiao-Lan Yu, Yong He
The capacity of pomelo peels' adsorption on lead(II) from aqueous solutions without modifications was investigated and confirmed. Four variables in this study, pH, temperature, time and initial concentration of lead(II), significantly affected the adsorption rate of pomelo peels. The prediction model and optimal ranges of optimized variables were given by Doehlert designs, which made the selection of variables rapid, flexible and effortless to obtain an adsorption rate reaching 99.9% and 20 mg/L for initial lead(II) concentration, 3 for pH, 50 °C for temperature and 210 min for time was a choice...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29329862/active-compounds-antioxidant-activity-and-%C3%AE-glucosidase-inhibitory-activity-of-different-varieties-of-chaenomeles-fruits
#2
Jing Miao, Xia Li, Chengcheng Zhao, Xiaoxiao Gao, Ying Wang, Wenyuan Gao
Chaenomeles is an important source for food industry in China, and its planting area is expanding year by year. This study was conducted to evaluate different varieties of Chaenomeles by comparing the chemical compositions, antioxidant activity and α-glucosidase inhibitory activity of peels and fleshes from twelve varieties of Chaenomeles. In the results, peels of Chaenomeles contain more phenolics, flavonoids and triterpenes, and show better antioxidant activity and α-glucosidase inhibitory activity than their fleshes...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29296091/xanthelasma-palpebrarum-a-brief-review
#3
REVIEW
Pragya A Nair, Rochit Singhal
Xanthelasma palpebrarum is the most common cutaneous xanthoma, characterized by yellowish plaques over eyelids - most commonly, over the inner canthus of the upper lid. It is triggered by hyperlipidemia, thyroid dysfunction, and diabetes mellitus. Xanthelasma results from perivascular infiltration of mono- and multinucleated foam cells within lipid-laden cytoplasmic vacuoles in the superficial reticular dermis. Different modalities of treatment, such as simple surgical excision, cryotherapy, chemical peeling with trichloroacetic acid, radiofrequency, and laser, are used in the treatment of xanthelasma palpebrarum...
2018: Clinical, Cosmetic and Investigational Dermatology
https://www.readbyqxmd.com/read/29287368/effect-of-kappa-carrageenan-oligosaccharides-on-myofibrillar-protein-oxidation-in-peeled-shrimp-litopenaeus-vannamei-during-long-term-frozen-storage
#4
Bin Zhang, Chuan-Dong Fang, Gui-Juan Hao, Yang-Yang Zhang
Protein oxidation during chilling and frozen storage has recently attracted great attention due to its consequences on protein solubility and functionality. In this study, the effects of kappa-carrageenan oligosaccharides on myofibrillar protein oxidation in peeled shrimp (Litopenaeus vannamei) during frozen storage were investigated by assessing the content of the carbonyls, total sulfhydryl, dityrosine, and surface hydrophobicity. We also examined the means of antioxidant activity in vitro, degradation of muscle proteins, and integrity of tissue structure...
April 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29286838/patients-self-esteem-before-and-after-chemical-peeling-procedure
#5
Kouris Anargyros, Platsidaki Eftychia, Christodoulou Christos, Efstathiou Vasiliki, Markantoni Vasiliki, Armyra Kaliopi, Potouridou Irene, Rigopoulos Dimitrios, Kontochristopoulos George
INTRODUCTION: Chemical peeling is a safe method, widely used to treat a variety of skin conditions and reduce the aging effects. This study aims to evaluate self-esteem among adolescents who undergo chemical peelings. MATERIAL AND METHODS: One hundred and twenty six patients constituted the study group. Sixty seven individuals had undergone chemical peeling for therapeutic reasons and 59 individuals for cosmetic reasons. To assess patients' self-esteem, the Rosenberg's Self-esteem Scale (RSES) was used before and after treatment...
December 29, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29284137/grapefruit-and-its-biomedical-antigenotoxic-and-chemopreventive-properties
#6
REVIEW
José Melesio Cristóbal-Luna, Isela Álvarez-González, Eduardo Madrigal-Bujaidar, Germán Chamorro Cevallos
Grapefruit (Citrus paradisi Mcfad) is a perenifolium tree 5-6 m high with a fruit of about 15 cm in diameter, protected by the peel we can find about 11-14 segments (carpels), each of which is surrounded by a membrane and each containing the juice sacs, as well as the seeds. The fruit is made up of numerous compounds, and is known to have nutritive value because of the presence of various vitamins and minerals, among other chemicals. The fruit is also used in the field of gastronomy. Information has been accumulated regarding the participation of the fruit structures in a variety of biomedical, antigenotoxic and chemopreventive effects, surely related with the presence of the numerous chemicals that have been determined to constitute the fruit...
December 25, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29279953/chemical-peeling-with-a-modified-phenol-formula-for-the-treatment-of-facial-freckles-on-asian-skin
#7
Hua-Feng Sun, Hai-Shan Lu, Le-Qi Sun, Wei-Dong Ping, Dong-Sheng Mao, Dan Li
BACKGROUND: Chemical peeling is an efficient method for the treatment of pigment disorders. For freckles, medium-depth to deep peeling using a phenol solution is one of the most effective chemical peels, and modifications of facial skin can be observed up to 20 years after peeling. However, applying phenol to the skin may cause serious side effects. Phenol peeling has been rarely used in Asia due to its tendency to cause permanent pigmentary changes and hypertrophic scars. METHODS: In total, 896 Chinese inpatients with facial freckles were enrolled in this study...
December 26, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/29273952/modification-of-pomegranate-waste-with-iron-ions-a-green-composite-for-removal-of-pb-from-aqueous-solution-equilibrium-thermodynamic-and-kinetic-studies
#8
Mohammad Hossein Salmani, Mohammad Abedi, Sayed Ahmad Mozaffari, Hossien Ali Sadeghian
Pomegranate waste modified with Fe2+ and Fe3+ ions followed with carbonization were used as an adsorbent to remove the Pb2+ ions from aqueous solution. To optimum the highest adsorption efficiency, adsorption experiments were conducted on iron modified carbons by batch technique. The characteristic of composite was studied by scanning electron microscope (SEM) and Fourier transform infrared spectrometer (FT-IR). The best pH for control of chemical adsorption was selected within pH of 6.0-6.5. It was observed that the contact time of 90 min, initial concentration 50...
December 22, 2017: AMB Express
https://www.readbyqxmd.com/read/29248344/use-of-an-online-extraction-liquid-chromatography-quadrupole-time-of-flight-tandem-mass-spectrometry-method-for-the-characterization-of-polyphenols-in-citrus-paradisi-cv-changshanhuyu-peel
#9
Chaoying Tong, Mijun Peng, Runna Tong, Ruyi Ma, Keke Guo, Shuyun Shi
Chemical profiling of natural products by high performance liquid chromatography (HPLC) was critical for understanding of their clinical bioactivities, and sample pretreatment steps have been considered as a bottleneck for analysis. Currently, concerted efforts have been made to develop sample pretreatment methods with high efficiency, low solvent and time consumptions. Here, a simple and efficient online extraction (OLE) strategy coupled with HPLC-diode array detector-quadrupole time-of-flight tandem mass spectrometry (HPLC-DAD-QTOF-MS/MS) was developed for rapid chemical profiling...
December 12, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29242125/optimization-for-pectinase-assisted-extraction-of-polysaccharides-from-pomegranate-peel-with-chemical-composition-and-antioxidant-activity
#10
Xichuan Zhai, Caiping Zhu, Yun Li, Yang Zhang, Zhen Duan, Xingbin Yang
In this work, based on response surface methodology (RSM), an optimized method of extracting water-soluble polysaccharide from pomegranate peel (PPP) with pectinase was proposed. Additionally, the chemical composition and the antioxidant activities of the extracted PPP were studied. The effects of three factors of enzymolysis time, ratio of liquid to solid and dosage of enzyme on the PPP yield were investigated. The experimental results showed that the optimal conditions were as following: enzymolysis time 19...
December 11, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29236677/a-chemometrics-approach-for-nuclear-magnetic-resonance-data-to-characterize-the-partial-metabolome-banana-peels-from-southern-brazil
#11
Sara Cardoso, Marcelo Maraschin, Luiz Augusto Martins Peruch, Miguel Rocha, Aline Pereira
Banana peels are well recognized as a source of important bioactive compounds, such as phenolics, carotenoids, biogenic amines, among others. As such, they have recently started to be used for industrial purposes. However, its composition seems to be strongly affected by biotic or abiotic ecological factors. Thus, this study aimed to investigate banana peels chemical composition, not only to get insights on eventual metabolic changes caused by the seasons, in southern Brazil, but also to identify the most relevant metabolites for these processes...
December 13, 2017: Journal of Integrative Bioinformatics
https://www.readbyqxmd.com/read/29222908/how-effective-are-common-household-preparations-on-removing-pesticide-residues-from-fruit-and-vegetables-a-review
#12
REVIEW
Stephen W C Chung
Nowadays, the use of pesticides is inevitable for pest-control in crops, especially the fruit and vegetables. After the harvest from raw agricultural commodities, the amount of pesticide residues in food is mainly influenced by the storage, handling and processing that follow. If good agricultural and good manufacturing practices are enforced effectively, the amount of pesticide residues would be brought below the corresponding maximum residue level. Thus, the consumption of raw and/or prepared fruit and vegetables would be safe...
December 9, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29222629/postinflammatory-hyperpigmentation-epidemiology-clinical-presentation-pathogenesis-and-treatment
#13
REVIEW
Bridget P Kaufman, Taulun Aman, Andrew F Alexis
Postinflammatory hyperpigmentation (PIH) is a reactive hypermelanosis that develops following cutaneous inflammation. Common causes of PIH include intrinsic skin conditions (e.g., acne and eczema) as well as external insults to the skin, such as burn injuries and dermatologic procedures. PIH more commonly occurs in individuals with darker skin, for whom it is often a source of significant psychological distress. Several therapeutic modalities are available for the treatment of PIH, including topical agents, chemical peels, and energy-based devices...
December 8, 2017: American Journal of Clinical Dermatology
https://www.readbyqxmd.com/read/29218941/-study-on-diarylheptanoids-from-green-peel-of-juglans-sigillata
#14
Dong-Mei Li, You-Lun Peng, Guang-Ming Liu
The chemical constituents from green peel of Juglans sigillata were isolated by column chomatographies over silica gel, Sephadex LH-20, and MCI. Four diarylheptanoids were isolated and their structures were characterized as dihydropterocarine(1), 3',4″-epoxy-1-(4'-hydroxy-phenyl)-7-(3″-methoxyl-phenyl)-heptan-3α-ol(2), pterocarine(3), and 1-(4'-hydroxy-phenyl)-7-(3″-methoxy-4″-hydroxyphenyl)-heptan-3α-ol(4). Compound 1 is a new compound, named as dihydropterocarine. Compounds 2-4 were isolated from the plant of J...
September 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29199463/a-new-c-glycosyl-flavone-and-a-new-neolignan-glycoside-from-passiflora-edulis-sims-peel
#15
Yue Hu, Lin Jiao, Min-Hong Jiang, Sheng Yin, Pan Dong, Zhi-Min Zhao, De-Po Yang, Pei-Tsai Ho, Dong-Mei Wang
A new C-glycosyl flavone, Chrysin-8-C-(2″-O-β-6-deoxy-glucopyranosyl)-β-D-glucopyranoside (1), a new neolignan glycoside, citrusin G (2), as well as 15 known compounds (3-17) were isolated from the peel of Passiflora edulis Sims. The structure determinations were primarily based on comprehensive spectroscopic analyses, and the absolute configuration of 2 were unequivocally determined by the CD experiment and chemical transformation. Compound 1 represents the rare examples of the flavonoid featuring a deoxy glucose sugar moiety...
December 4, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29195928/acoustic-cavitation-assisted-extraction-of-pectin-from-waste-grapefruit-peels-a-green-two-stage-approach-and-its-general-mechanism
#16
Wenjun Wang, Xingzhu Wu, Thunthacha Chantapakul, Danli Wang, Song Zhang, Xiaobin Ma, Tian Ding, Xingqian Ye, Donghong Liu
In the present study, acoustic cavitation assisted extraction (ACAE) which is a green approach was used for two-stage extraction of pectin from waste grapefruit peels regarding the specific two stages and different peel particle sizes. The yields, physicochemical properties and structure prediction of pectin from different peel particle sizes and different stages by two methods were compared. Highest pectin yield of 23.49% was achieved at the peel size of 0.9mm and was slightly higher than the yield of 23.44% at finer particle size...
December 2017: Food Research International
https://www.readbyqxmd.com/read/29186249/tretinoin-peel-a-critical-view
#17
Juliana Mayumi Sumita, Gislaine Ricci Leonardi, Ediléia Bagatin
The tretinoin peel, also known as retinoic acid peel, is a superficial peeling often performed in dermatological clinics in Brazil. The first study on this was published in 2001, by Cuce et al., as a treatment option for melasma. Since then, other studies have reported its applicability with reasonable methodology, although without a consistent scientific background and consensus. Topical tretinoin is used for the treatment of various dermatoses such as acne, melasma, scars, skin aging and non-melanoma skin cancer...
May 2017: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/29164826/comparative-study-of-buffered-50-glycolic-acid-ph-3-0-0-5-salicylic-acid-solution-vs-jessner-s-solution-in-patients-with-acne-vulgaris
#18
Jeong In Jae, Hyun Dong Ju, Kim Dong Hyun, Moon Soo Yoon, Hee Jung Lee
BACKGROUND: Superficial chemical peels are frequently used in acne vulgaris treatment. Although glycolic acid (GA) has been widely used in clinical practice, its pH ranges from 0.08-2.75 and thus should be neutralized after application to avoid burns. OBJECTIVE: To evaluate treatment efficacy and safety of chemical peeling using buffered 50% GA (pH 3.0) + 0.5% salicylic acid (SA) solution that does not need to be neutralized in the treatment of acne vulgaris compared to the conventional peeling using Jessner's solution...
November 21, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29155374/testing-the-waters-from-moringa-seeds-to-fruit-peels-researchers-are-seeking-out-new-ways-to-clean-up-the-world-s-drinking-water
#19
Wudan Yan
Water on Earth-in our oceans, rivers, lakes, and wetlands-might seem plentiful, but water that is clean and safe enough to drink actually isn't so abundant. Nearly one in ten people still lacks access to safe water worldwide, according to the World Health Organization. In some of the world's most remote and impoverished communities, people live with no taps, showers, flushing toilets, or nearby springs, making it difficult to keep water supplies safe from bacteria, chemicals, and particulates. Moreover, access to clean drinking water isn't just a problem in the developing world; groundwater in developed countries is typically used far more quickly than it is being replenished...
November 2017: IEEE Pulse
https://www.readbyqxmd.com/read/29120775/preparation-and-prebiotic-potential-of-pectin-oligosaccharides-obtained-from-citrus-peel-pectin
#20
Shanshan Zhang, Haijuan Hu, Lufeng Wang, Fengxia Liu, Siyi Pan
Pectin oligosaccharide (POS) fractions were obtained by controlled chemical degradation of citrus peel pectin. By adjusting trifluoroacetic acid (TFA) concentration, three oligosaccharides were obtained, of molecular weight (Mw) range 3000-4000 Da, 2000-3000 Da and lower than 2000 Da. Varying hydrogen peroxide (H2O2) concentration and reaction time produced oligosaccharides of 3000-4000 Da and 2000-3000 Da. The relative proportions of acidic monosaccharide increased from 68.58% to 89.93% (TFA) and from 63...
April 1, 2018: Food Chemistry
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