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Chemical peeling

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https://www.readbyqxmd.com/read/28821062/cell-wall-polysaccharides-from-pulp-and-peel-of-cubiu-a-pectin-rich-fruit
#1
Cristiane Colodel, Rosane Maria das Graças Bagatin, Talita Maria Tavares, Carmen Lúcia de Oliveira Petkowicz
To investigate the polysaccharides of cubiu (Solanum sessiliflorum D.) fruits, pulp and peel were subjected to sequential extractions using different solvents, giving rise to pectins heterogeneous with respect to their structural characteristics, xylan, arabinogalactoxyloglucans and glucomannans. Chemical, physicochemical and spectroscopic analyses were used to characterize the polysaccharides obtained. Pectins with uronic acid content of commercial grade were obtained from the peel of cubiu fruits using water (25°C and 100°C) and EDTA and from its pulp using water (100°C)...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28813557/facial-erosive-pustular-dermatosis-after-cosmetic-resurfacing
#2
Julie E Mervak, Stephanie D Gan, Emily H Smith, Frank Wang
Importance: Erosive pustular dermatosis (EPD) is a rare condition that typically affects actinically damaged skin of the scalp. Characterized by sterile pustules, erosions, and crusts, EPD is difficult to treat and heals slowly. The exact cause of EPD is unknown, although trauma is an inciting factor. Objective: To describe 3 women who presented with prolonged facial erosions after cosmetic resurfacing procedures, specifically fully ablative carbon dioxide laser or medium-depth chemical peel...
August 16, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/28799792/effects-of-daily-food-processing-on-allergenicity
#3
Beatriz Cabanillas, Natalija Novak
Daily food processing has the potential to alter the allergenicity of foods due to modification of the physico-chemical properties of proteins. The degree of such modifications depends on factors such as processing conditions, type of food considered, allergenic content, etc. The impact of daily food processing like boiling, roasting, frying or baking on food allergenicity have been extensively studied. The influence of other thermal treatments such as microwave heating or pressure cooking on allergenicity has also been analyzed...
August 11, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28796657/microneedling-a-review-and-practical-guide
#4
Tina S Alster, Paul M Graham
BACKGROUND: Microneedling is a relatively new treatment option in dermatology and has been touted for a broad range of applications including skin rejuvenation, acne scarring, rhytides, surgical scars, dyschromia, melasma, enlarged pores, and transdermal drug delivery. The significant increase in minimally invasive procedures that has been reported over the past several years suggest that microneedling may occupy a specific niche for patients who desire measurable clinical results from treatments with little to no recovery...
August 7, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28766401/evaluation-of-a-pomegranate-peel-extract-pge-as-alternative-mean-to-control-olive-anthracnose
#5
Sonia Pangallo, Maria Giulia Li Destri Nicosia, Giovanni Enrico Agosteo, Ahmed Abdelfattah, Flora Valeria Romeo, Santa O Cacciola, Paolo Rapisarda, Leonardo Schena
Olive anthracnose is caused by different species of Colletotrichum spp. and may be regarded as the most damaging disease of olive fruits worldwide, greatly affecting quality and quantity of the productions. A pomegranate peel extract (PGE) proved very effective in controlling the disease. The extract had a strong in vitro fungicidal activity against Colletotrichum acutatum sensu stricto, was very effective in both preventive and curative trials with artificially inoculated fruit, and induced resistance in treated olive tissues...
August 2, 2017: Phytopathology
https://www.readbyqxmd.com/read/28735564/synergistic-effect-of-co-digestion-to-enhance-anaerobic-degradation-of-catering-waste-and-orange-peel-for-biogas-production
#6
Muzammil Anjum, Azeem Khalid, Samia Qadeer, Rashid Miandad
Catering waste and orange peel were co-digested using an anaerobic digestion process. Orange peel is difficult to degrade anaerobically due to the presence of antimicrobial agents such as limonene. The present study aimed to examine the feasibility of anaerobic co-digestion of catering waste with orange peel to provide the optimum nutrient balance with reduced inhibitory effects of orange peel. Batch experiments were conducted using catering waste as a potential substrate mixed in varying ratios (20-50%) with orange peel...
July 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28732800/histological-case-control-study-of-peeling-induced-skin-changes-by-different-peeling-agents-in-surgically-subcutaneous-undermined-skin-flaps-in-facelift-patients
#7
P Gonser, S Kaestner, P Jaminet, K Kaye
A histological evaluation of peeling-induced skin changes in subcutaneous undermined preauricular facial skin flaps of nine patients was performed. There were three treatment groups: Trichloroacetic acid (TCA) 25%, TCA 40% and phenol/croton oil; one group served as control. Two independent evaluators determined the epidermal and dermal thickness and the depth of necrosis (micrometre). The percentual tissue damage due to the peeling was calculated, and a one-sample t-test for statistical significance was performed...
June 27, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28726212/melasma-an-up-to-date-comprehensive-review
#8
REVIEW
Oluwatobi A Ogbechie-Godec, Nada Elbuluk
Melasma is a common acquired condition of symmetric hyperpigmentation, typically occurring on the face, with higher prevalence in females and darker skin types. Multiple etiologies, including light exposure, hormonal influences, and family history, have been implicated in the pathogenesis of this disorder. Overall prevalence ranges widely at 1-50%, since values are typically calculated within a specific ethnic population within a geographic region. Histologically, melasma can display increased epidermal and/or dermal pigmentation, enlarged melanocytes, increased melanosomes, solar elastosis, dermal blood vessels, and, occasionally, perivascular lymphohistiocytic infiltrates...
July 19, 2017: Dermatology and Therapy
https://www.readbyqxmd.com/read/28722812/chemical-profile-of-pineapple-cv-vit%C3%A3-ria-in-different-maturation-stages-using-electrospray-ionization-mass-spectrometry
#9
Elizângela M Ogawa, Helber B Costa, José A Ventura, Luiz C S Caetano, Fernanda E Pinto, Bruno G Oliveira, Maria Eduarda S Barroso, Rodrigo Scherer, Denise C Endringer, Wanderson Romão
BACKGROUND: Pineapple is the fruit of Ananas comosus var. comosus plant, being cultivated in tropical areas and has high energy content and nutritional value. Herein, 30 samples of pineapple cv. Vitória were analyzed as a function of the maturation stage (0-5) and their physicochemical parameters monitored. Besides, negative-ion mode electrospray ionization mass spectrometry (ESI(-)FT-ICR MS) was used to identify and semi-quantify primary and secondary metabolites present in the crude and phenolic extracts of pineapple, respectively...
July 19, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28702529/assessing-chemotherapeutic-effectiveness-using-a-paper-based-tumor-model
#10
Matthew W Boyce, Gabriel J LaBonia, Amanda B Hummon, Matthew R Lockett
In vitro models for screening new cancer chemotherapeutics often rely on two-dimensional cultures to predict therapeutic potential. Unfortunately, the predictive power of these models is limited, as they fail to recapitulate the complex three-dimensional environments in tumors that promote a chemoresistant phenotype. In this study, we describe the preparation and characterization of paper-based cultures (PBCs) engineered to assess chemotherapeutic effectiveness in three dimensional, diffusion-limited environments...
July 24, 2017: Analyst
https://www.readbyqxmd.com/read/28699128/structures-of-antimutagenic-constituents-in-the-peels-of-citrus-limon
#11
Takahiro Matsumoto, Kazuki Takahashi, Sumire Kanayama, Yuka Nakano, Hiromi Imai, Masumi Kibi, Daisuke Imahori, Tomohiro Hasei, Tetsushi Watanabe
The methanolic extracts from the peels of Citrus limon were found to show antimutagenic effects against 3-amino-1,4-dimethyl-5H-pyrido[4,3-b]indole, and 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) in the Ames test. From the methanolic extracts, four new coumarins (wakayamalimonol A-D) and a new furanocoumarin (wakayamalimonol E) were isolated together with fifteen known compounds. The absolute stereostructures of the new compounds were determined by chemical synthesis and the modified Mosher's method...
July 11, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/28678157/an-injectable-glass-polyalkenoate-cement-engineered-for-fracture-fixation-and-stabilization
#12
Basel A Khader, Sean A F Peel, Mark R Towler
Glass polyalkenoate cements (GPCs) have potential as bio-adhesives due to their ease of application, appropriate mechanical properties, radiopacity and chemical adhesion to bone. Aluminium (Al)-free GPCs have been discussed in the literature, but have proven difficult to balance injectability with mechanical integrity. For example, zinc-based, Al-free GPCs reported compressive strengths of 63 MPa, but set in under 2 min. Here, the authors design injectable GPCs (IGPCs) based on zinc-containing, Al-free silicate compositions containing GeO₂, substituted for ZnO at 3% increments through the series...
July 5, 2017: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/28666162/metabolic-profiling-analysis-of-siraitia-grosvenorii-revealed-different-characteristics-of-green-fruit-and-saccharified-yellow-fruit
#13
Chengnan Fang, Qingqing Wang, Xinyu Liu, Guowang Xu
Siraitia grosvenorii is an economic and medicinal plant, its fruit is considered to be good to health for its diverse bioactive ingredients. However, the clarification of chemical composition and their changes after saccharification procedure are not well performed. In present study, a metabolomics method based on ultra-high-performance liquid chromatography tandem quadrupole time-of-flight mass spectrometry was developed for metabolic profiling acquisition of Siraitia grosvenorii extract. Furthermore, information dependent analysis (IDA) combined with self-constructed LC-MS/MS identification system for metabolites were employed to identify primary and secondary metabolites in Siraitia grosvenorii...
June 20, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28658462/isotretinoin-and-timing-of-procedural-interventions-a-systematic-review-with-consensus-recommendations
#14
Leah K Spring, Andrew C Krakowski, Murad Alam, Ashish Bhatia, Jeremy Brauer, Joel Cohen, James Q Del Rosso, Lucia Diaz, Jeffrey Dover, Lawrence F Eichenfield, Geoffrey C Gurtner, C William Hanke, Marla N Jahnke, Kristen M Kelly, Shilpi Khetarpal, Megan A Kinney, Moise L Levy, James Leyden, Michael T Longaker, Girish S Munavalli, David M Ozog, Heidi Prather, Peter R Shumaker, Elizabeth Tanzi, Abel Torres, Mara Weinstein Velez, Abigail B Waldman, Albert C Yan, Andrea L Zaenglein
Importance: The notion that systemic isotretinoin taken within 6 to 12 months of cutaneous surgery contributes to abnormal scarring or delayed wound healing is widely taught and practiced; however, it is based on 3 small case series from the mid-1980s. Objective: To evaluate the body of literature to provide evidence-based recommendations regarding the safety of procedural interventions performed either concurrently with, or immediately following the cessation of systemic isotretinoin therapy...
August 1, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/28653735/unavoidable-food-supply-chain-waste-acid-free-pectin-extraction-from-mango-peel-via-subcritical-water
#15
H Xia, A S Matharu
Mango peel is the major by-product of mango processing, and compromises 7-24% of the total mango weight. In this study, pectin was extracted from mango peel waste by using subcritical water extraction (SWE) in the absence of mineral acid. A highest yield of 18.34% was achieved from the Kesar variety and the pectin was characterised using ATR-IR spectroscopy, TGA and (13)C solid-state NMR spectroscopy to confirm the structure. The degree of esterification (DE) of the pectin was analysed with both titrimetry and (13)C solid-state NMR spectroscopy, and a high DE (>70%) was observed for all three varieties (Keitt, Sindhri and Kesar)...
June 27, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28623504/biosorption-of-chromium-vi-from-aqueous-solutions-and-ann-modelling
#16
Soma Nag, Abhijit Mondal, Nirjhar Bar, Sudip Kumar Das
The use of sustainable, green and biodegradable natural wastes for Cr(VI) detoxification from the contaminated wastewater is considered as a challenging issue. The present research is aimed to assess the effectiveness of seven different natural biomaterials, such as jackfruit leaf, mango leaf, onion peel, garlic peel, bamboo leaf, acid treated rubber leaf and coconut shell powder, for Cr(VI) eradication from aqueous solution by biosorption process. Characterizations were conducted using SEM, BET and FTIR spectroscopy...
June 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28607861/a-deceptively-simple-solution-for-refractory-melasma-glycolic-acid-peels-and-hydroquinone-at-home
#17
Takanobu Mashiko, Aiko Oka, Ema Osawa, Isao Koshima
Although various treatment methods for melasma have developed, substantial improvement of the condition is sometimes difficult. We have experientially found that some of refractory melasma caused by daily friction can easily be treated by using a combination of a peeling agent (20% glycolic acid) and a depigmenting agent (5% hydroquinone) twice daily at home. And here, by performing skin biopsies, we revealed the pathological mechanism: hyperkeratosis caused by repeated physical stimulus, which prevents infiltration of topical therapeutic agents, was dramatically reduced by chemical peeling, resulting that the melanin pigments were effectively cleared by topical hydroquinone...
May 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28598384/anti-inflammatory-and-neuroprotective-constituents-from-the-peels-of-citrus-grandis
#18
Ping-Chung Kuo, Yu-Ren Liao, Hsin-Yi Hung, Chia-Wei Chuang, Tsong-Long Hwang, Shiow-Chyn Huang, Young-Ji Shiao, Daih-Huang Kuo, Tian-Shung Wu
A series of chromatographic separations performed on the ethanol extracts of the peels of Citrus grandis has led to the characterization of forty compounds, including seventeen coumarins, eight flavonoids, two triterpenoids, four benzenoids, two steroids, one lignan, one amide, and five other compounds, respectively. The chemical structures of the purified constituents were identified on the basis of spectroscopic elucidation, including 1D- and 2D-NMR, UV, IR, and mass spectrometric analysis. Most of the isolated compounds were examined for their inhibition of superoxide anion generation and elastase release by human neutrophils...
June 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28577465/nanocomposites-based-on-banana-starch-reinforced-with-cellulose-nanofibers-isolated-from-banana-peels
#19
Franciele Maria Pelissari, Margarita María Andrade-Mahecha, Paulo José do Amaral Sobral, Florencia Cecilia Menegalli
Cellulose nanofibers were isolated from banana peel using a combination of chemical and mechanical treatments with different number of passages through the high-pressure homogenizer (0, 3, 5, and 7 passages). New nanocomposites were then prepared from a mixed suspension of banana starch and cellulose nanofibers using the casting method and the effect of the addition of these nanofibers on the properties of the resulting nanocomposites was investigated. The cellulose nanofibers homogeneously dispersed in the starch matrix increased the glass transition temperature, due to the strong intermolecular interactions occurring between the starch and cellulose...
May 26, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28570907/melanin-gamma-rays-assistants-for-bismuth-oxide-nanoparticles-synthesis-at-room-temperature-for-enhancing-antimicrobial-and-photocatalytic-activity
#20
Ahmed I El-Batal, Gharieb S El-Sayyad, Abbas El-Ghamry, Kerolos M Agaypi, Mohamed A Elsayed, Mohamed Gobara
Melanin pigment has been deemed as a natural photoprotector with strong hydrophobicity. It allured considerable compatibility with many applications in medicine, food, and nanotechnology. Penicillium chrysogenium has been devoted to the green synthesis of melanin whereby optimizing its culture and environmental conditions. The impacts of alternative economic L-tyrosine natural sources (unprecedented alternate origins) and gamma radiation were pledged for the potential growing of the pigment. Herein, notable increases in melanin yield (6...
May 23, 2017: Journal of Photochemistry and Photobiology. B, Biology
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