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Chemical peel

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https://www.readbyqxmd.com/read/29470423/3-5-6-7-8-3-4-heptamethoxyflavone-a-citrus-flavonoid-inhibits-collagenase-activity-and-induces-type-i-procollagen-synthesis-in-hdfn-cells
#1
Hong-Il Kim, Yong-Un Jeong, Jong-Hyeon Kim, Young-Jin Park
Citrus fruits contain various types of flavonoids with powerful anti-aging and photoprotective effects on the skin, and have thus been attracting attention as potential, efficacious skincare agents. Here, we aimed to investigate the chemical composition of Citrus unshiu and its protective effects on photoaging. We isolated and identified a bioactive compound, 3,5,6,7,8,3',4'-heptamethoxyflavone (HMF), from C. unshiu peels using ethanol extraction and hexane fractionation. HMF inhibited collagenase activity and increased type I procollagen content in UV-induced human dermal fibroblast neonatal (HDFn) cells...
February 22, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29449885/deep-eutectic-solvents-pretreatment-of-agro-industrial-food-waste
#2
Alessandra Procentese, Francesca Raganati, Giuseppe Olivieri, Maria Elena Russo, Lars Rehmann, Antonio Marzocchella
Background: Waste biomass from agro-food industries are a reliable and readily exploitable resource. From the circular economy point of view, direct residues from these industries exploited for production of fuel/chemicals is a winning issue, because it reduces the environmental/cost impact and improves the eco-sustainability of productions. Results: The present paper reports recent results of deep eutectic solvent (DES) pretreatment on a selected group of the agro-industrial food wastes (AFWs) produced in Europe...
2018: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/29448180/feasibility-of-four-wastes-to-remove-heavy-metals-from-contaminated-soils
#3
Can Feng, Shirong Zhang, Linxian Li, Guiyin Wang, Xiaoxun Xu, Ting Li, Qinmei Zhong
Soil washing is one of the permanent techniques to remove heavy metals, and washing agent is a key influence factor for this technique, but there is still lack of high-efficiency, eco-friendly, and inexpensive agents. In this study, four wastes including pineapple peel (PP), soybean straw (SS), broad bean straw (BBS) and tea residue (TR) were employed to remove cadmium (Cd), lead (Pb) and zinc (Zn) in contaminated soils. The Fourier transform infrared spectroscopy (FTIR) analysis indicated that hydroxyl, carboxyl, amine, carbonyl and amide groups were involved in the interaction with metal ions by complexation or ion exchange...
February 12, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29444375/the-efficacy-and-safety-of-non-pharmacological-therapies-for-the-treatment-of-acne-vulgaris-a-systematic-review-and-best-evidence-synthesis
#4
F M C de Vries, A M Meulendijks, R J Driessen, A A van Dooren, E P M Tjin, P C M van de Kerkhof
BACKGROUND: Acne vulgaris is a multifaceted skin disorder, affecting more than 85% of young individuals worldwide. Pharmacological therapy is not always desirable because of the development of antibiotic resistance or the potential risk of adverse effects. Non-pharmacological therapies can be viable alternatives for conventional therapies. However, sufficient evidence based support in the efficacy and safety of non-pharmacological therapies is lacking. OBJECTIVE: To assess the efficacy and safety of several non-pharmacological therapies in the treatment of acne vulgaris...
February 14, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29431372/pigmentation-disorders-diagnosis-and-management
#5
Scott Plensdorf, Maria Livieratos, Nabil Dada
Pigmentation disorders are commonly diagnosed, evaluated, and treated in primary care practices. Typical hyperpigmentation disorders include postinflammatory hyperpigmentation, melasma, solar lentigines, ephelides (freckles), and café au lait macules. These conditions are generally benign but can be distressing to patients. Appropriate dermatologic history, skin examination, and skin biopsy, when appropriate, can help exclude melanoma and its precursors. In addition to addressing the underlying condition, hyperpigmentation is treated with topical agents, chemical peels, cryotherapy, light or laser therapy, or a combination of these methods...
December 15, 2017: American Family Physician
https://www.readbyqxmd.com/read/29416561/physico-chemical-oxidative-cleavage-strategy-facilitates-the-degradation-of-recalcitrant-crystalline-cellulose-by-cellulases-hydrolysis
#6
Huan Zhou, Liuyang Wang, Yun Liu
Background: Efficient enzymatic conversion of recalcitrant crystalline cellulose is critical for enabling cost-effective industrial conversion of cellulosic biomass to biofuels and chemicals. Fully understanding enzyme digestion mechanism is paving a new way to design efficient process for biomass conversion. Accordingly, a continuing drive is inspiring to discover new routes to promote crystalline cellulose disruption. Results: Herein, a physico-chemical oxidative cleavage strategy of irradiation oxidation/post-reduction (IOPR) was employed to treat crystalline cellulose I to cleave glycosidic bonds association with some new oxidized and reduced chain ends, thus boosting downstream degradation by cellulases from Trichoderma reesei...
2018: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/29399557/chemical-profile-and-biological-activity-of-casimiroa-edulis-non-edible-fruit-s-parts
#7
Wafaa Mostafa Elkady, Eman Ahmed Ibrahim, Mariam Hussein Gonaid, Farouk Kamel El Baz
Purpose: the non-edible fruit parts of Casimiroa edulis Llave et were evaluated for their active constituents and their potential as antioxidants, anti-inflammatory and antitumor activity. Methods: Fruits peel (FP) and seeds kernel (SK) of Casimiroa edulis Llave et Lex. were extracted successively with hexane and then methanol. Fatty acids were prepared from hexane extracts and identified by GC. Total flavonoid, phenolic acids and tannins contents in methanol extracts were determined by UV spectrophotometer and identified by HPLC...
December 2017: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29388997/enhanced-adhesion-of-zno-nanowires-during-in-situ-scanning-electron-microscope-peeling
#8
J L Mead, H Xie, S Wang, H Huang
The interfacial adhesion behaviour of a ZnO nanowire-Si substrate system is investigated using an in situ scanning electron microscope (SEM) mechanical peeling technique. The peel front of a nanowire advances via stick-slip events, and an equilibrium between the driving and resistant force to separation occurs immediately prior to a slip event. The interfacial adhesion energy is one order higher than that predicted theoretically by van der Waals interactions. The enhanced adhesion is primarily attributed to chemical and electrostatic interfacial interactions induced by electron irradiation...
February 1, 2018: Nanoscale
https://www.readbyqxmd.com/read/29385238/evaluation-of-amazon-fruits-chemical-and-nutritional-studies-on-borojoa-sorbilis
#9
Francimilton Rabelo Rodrigues, Aline de Souza Ramos, Ana Claudia Fernandes Amaral, José Luiz Pinto Ferreira, Carla da Silva Carneiro, Jefferson Rocha de Andrade Silva
BACKGROUND: Borojoa sorbilis (Ducke) is an Amazonian species with edible fruits that are widely consumed by the local population, but little studied and not yet economically explored. Thus, the aim of this study was to describe the chemical composition, volatile compounds, nutritional aspects and antioxidant activity of the fruit pulp and peel of B. sorbilis. RESULTS: Headspace solid-phase microextraction (HS-SPME), using polydimethylsiloxane/divinylbenzene (PDMS/DVB) fiber, resulted in the identification of 59 substances in the pulp and peel of B...
January 31, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29382176/yacon-smallanthus-sonchifolius-poepp-endl-as-a-novel-source-of-health-promoting-compounds-antioxidant-activity-phytochemicals-and-sugar-content-in-flesh-peel-and-whole-tubers-of-seven-cultivars
#10
Forough Khajehei, Nikolaus Merkt, Wilhelm Claupein, Simone Graeff-Hoenninger
The aim of this study was to evaluate the quality characteristics of seven yacon (Smallanthus sonchifolius Poepp. and Endl.) cultivars (Cajamarca, Cusco, Early White, Late Red, Morado, New Zealand and Quinault) cultivated in the southwest of Germany. The following phyto/chemical traits were investigated in different yacon tuber parts (flesh, peel, and whole tubers): total dry matter, sugar content (fructose, glucose, and sucrose content), total phenolic content (TPC), total flavonoid content (TFC), 2,20-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging activity, 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, and Ferric reducing antioxidant power (FRAP)...
January 29, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29364150/molecular-imprinting-and-functional-polymers-for-all-transducers-and-applications
#11
EDITORIAL
Franz L Dickert
The main challenge in developing a chemical sensor is the synthesis of recognition coatings, which are very sensitive and selective to analytes of interest. Molecular imprinting has proven to be the most innovative strategy for this purpose in functional polymer design in the last few decades. Moreover, the introduction of functional groups brings about new applications for all available transducers. Sensitivity and selectivity features of sensor coatings can be tuned by this approach. The strategy produces molecular cavities and interaction sites in sensor coatings...
January 24, 2018: Sensors
https://www.readbyqxmd.com/read/29354388/evaluation-of-plant-based-natural-coagulants-for-municipal-wastewater-treatment
#12
Sandhya Maurya, Achlesh Daverey
In this study, four plant-based natural coagulants (banana peel powder, banana stem juice, papaya seed powder and neem leaf powder) were evaluated for the removal of turbidity, chemical oxygen demand (COD) and total suspended solids (TSS) from municipal wastewater. The experiments were conducted at room temperature without adjusting the initial pH. The maximum turbidity removal was observed with banana peel powder (59.6%) at 0.4 g/L of dosage. Papaya seed powder and banana stem juice were the most effective for TSS removal (66...
January 2018: 3 Biotech
https://www.readbyqxmd.com/read/29354380/bioethanol-production-from-microwave-assisted-acid-or-alkali-pretreated-agricultural-residues-of-cassava-using-separate-hydrolysis-and-fermentation-shf
#13
N S Pooja, M S Sajeev, M L Jeeva, G Padmaja
The effect of microwave (MW)-assisted acid or alkali pretreatment (300 W, 7 min) followed by saccharification with a triple enzyme cocktail (Cellic, Optimash BG and Stargen) with or without detoxification mix on ethanol production from three cassava residues (stems, leaves and peels) by Saccharomyces cerevisiae was investigated. Significantly higher fermentable sugar yields (54.58, 47.39 and 64.06 g/L from stems, leaves and peels, respectively) were obtained after 120 h saccharification from MW-assisted alkali-pretreated systems supplemented (D+) with detoxification chemicals (Tween 20 + polyethylene glycol 4000 + sodium borohydride) compared to the non-supplemented (D0) or MW-assisted acid-pretreated systems...
January 2018: 3 Biotech
https://www.readbyqxmd.com/read/29353788/fabrication-of-spherical-biochar-by-a-two-step-thermal-process-from-waste-potato-peel
#14
Xiao Yang, Eilhann E Kwon, Xiaomin Dou, Ming Zhang, Ki-Hyun Kim, Daniel C W Tsang, Yong Sik Ok
The aim of this study was to develop a new approach for the preparation of spherical biochar (SBC) by employing a two-step thermal technology to potato peel waste (PPW). Potato starch (PS), as a carbon-rich material with microscale spherical shape, was separated from PPW as a precursor to synthesizing SBC. The synthesis process comprised (1) pre-oxidization (preheating under air) of PS at 220 °C and (2) subsequent pyrolysis of the pretreated sample at 700 °C. Results showed that the produced SBC successfully retained the original PS morphology and that pre-oxidization was the key for its shape maintenance, as it reduced surface tension and enhanced structural stability...
January 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29351880/preparation-and-characterization-of-biocompatible-silver-nanoparticles-using-pomegranate-peel-extract
#15
Majid Nasiriboroumand, Majid Montazer, Hossein Barani
The potential application of any nanoparticles, including silver nanoparticles (AgNPs), strongly depends on their stability against aggregation. In the current study, an aqueous extract of pomegranate peel was used as a stabilizer during synthesis of AgNPs. Nanoparticles have been prepared by the chemical reduction method from an aqueous solution of silver nitrate in the presence of sodium borohydride as a reducing agent. The AgNPs were characterized by dynamic light scattering (DLS), zeta-potential measurements, UV-Vis spectroscopy and transmission electron microscopy (TEM)...
January 10, 2018: Journal of Photochemistry and Photobiology. B, Biology
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
#16
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
#17
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
#18
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
#19
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
#20
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
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