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Chemical peelings

Zaira Zaman Chowdhury, Bagavathi Krishnan, Suresh Sagadevan, Rahman Faizur Rafique, Nor Aliya Binti Hamizi, Yasmin Abdul Wahab, Ali Akbar Khan, Rafie Bin Johan, Y Al-Douri, Salim Newaz Kazi, Syed Tawab Shah
This research deals with the effect of the temperature on the physical, thermal, electrochemical, and adsorption properties of the carbon micro-spheres using hydrothermal carbonization (HTC). Until recently, limited research has been conducted regarding the effects of delignification during the HTC process of biomass residues especially Dimocarpus longan . In this regard, lignin was first extracted from the lingo-cellulosic waste of Longan fruit peel ( Dimocarpus longan ). The holocellulose (HC) separated from lignin and raw biomass substrates (Longan fruit exocarp/peel powder, LFP) were carbonized at different temperatures using water as the green catalyst...
August 6, 2018: Nanomaterials
Jingang Cui, Dawei Qi, Xue Wang
Graphite phase carbon nitride (g-C3 N4 ) composite structure materials, as a kind of stable compound with graphite-like structure, has attracted more and more attention due to its excellent properties, such as being able to absorb solar energy, stable chemical and optical properties and having a suitable oxidation potential. However, its application in the field of photocatalysis is limited by its small specific surface area and poor dispersibility. To solve this problem, ultra-thin g-C3 N4 nanosheets are often prepared using peeling methods...
November 2018: Ultrasonics Sonochemistry
Ruirui Liu, Jian Zhao, Qian Han, Xinyi Hu, Dong Wang, Xu Zhang, Peng Yang
Advances in material design and applications are highly dependent on the development of particle surface engineering strategies. However, few universal methods can functionalize particles of different compositions, sizes, shapes, and structures. The amyloid-like lysozyme assembly-mediated surface functionalization of inorganic, polymeric or metal micro/nanoparticles in a unique amyloid-like phase-transition buffer containing lysozyme are described. The rapid formation of a robust nanoscale phase-transitioned lysozyme (PTL) coating on the particle surfaces presents strong interfacial binding to resist mechanical and chemical peeling under harsh conditions and versatile surface functional groups to support various sequential surface chemical derivatizations, such as radical living graft polymerization, the electroless deposition of metals, biomineralization, and the facile synthesis of Janus particles and metal/protein capsules...
August 5, 2018: Advanced Materials
Assi Levi, Emmilia Hodak, Claes David Enk, Igor Snast, Dan Slodownik, Moshe Lapidoth
BACKGROUND: Actinic cheilitis (AC) is a common, chronic pre-malignant condition resulting from protracted sun exposure affecting the vermilion border of the lower lip. Treatment of AC aims at terminating the progression to squamous cell carcinoma by obliterating the primary lesion, and includes ablative methods; non-ablative modalities such as cryotherapy, electrodessication, chemical peeling, topical imiquimod and 5-fluorouracil; and photodynamic therapy (PDT). Daylight-activated PDT, in which natural daylight serves as the light source, showed promising results in the treatment of actinic keratoses with substantially less pain than conventional PDT...
July 31, 2018: Photodermatology, Photoimmunology & Photomedicine
Taous Saraoui, Françoise Leroi, Frédérique Chevalier, Jean-Michel Cappelier, Delphine Passerini, Marie-France Pilet
Listeria monocytogenes is a Gram-positive pathogen occurring in many refrigerated ready-to-eat foods. It is responsible for foodborne listeriosis, a rare but severe disease with a high mortality rate (20-30%). Lactococcus piscium CNCM I-4031 has the capacity to prevent the growth of L. monocytogenes in contaminated peeled and cooked shrimp and in a chemically defined medium using a cell-to-cell contact-dependent mechanism. To characterize this inhibition further, the effect of L. piscium was tested on a collection of 42 L...
2018: Frontiers in Microbiology
Vibhavee Sukruansuwan, Suchada Chanprateep Napathorn
Background: Pineapple is the third most important tropical fruit produced worldwide, and approximately 24.8 million tons of this fruit are produced annually throughout the world, including in Thailand, which is the fourth largest pineapple producer in the world. Pineapple wastes (peel and core) are generated in a large amount equal to approximately 59.36% based on raw material. In general, the anaerobic digestion of pineapple wastes is associated with a high biochemical oxygen demand and high chemical oxygen demand, and this process generates methane and can cause greenhouse gas emissions if good waste management practices are not enforced...
2018: Biotechnology for Biofuels
David E Castillo, Jonette E Keri
Acne vulgaris is the most common skin disorder in adolescents and young adults. It carries a significant psychological and economic burden to patients and society. A wide range of therapeutic options are available, including topicals and systemic therapies. Chemical peeling is a skin resurfacing procedure intended to regenerate normal skin from the application of exfoliative agents. It has been used for the treatment of acne vulgaris and other skin disorders for decades. There are several chemical agents with variable mechanisms of action, usually classified as superficial, medium, and deep peels...
2018: Clinical, Cosmetic and Investigational Dermatology
Céline Rouvrais, Martine Baspeyras, Valérie Mengeaud, Ana Beatris Rossi
BACKGROUND: Glycolic acid (GA) chemical peels are a popular treatment for photoaged skin rejuvenation, but retinaldehyde (RAL)-based cosmetic creams have also demonstrated efficacy in improving photoaging, and are potentially better tolerated than chemical peels. AIMS: To compare the efficacy and safety of an antiaging cream containing 0.1% RAL associated with Glycylglycine Oleamide (GGO, Relastide® ) and Pre-tocopheryl® , to GA peels sessions in the treatment of photoaging...
July 19, 2018: Journal of Cosmetic Dermatology
Kristen M Fedak, Nicholas Good, Jordyn Dahlke, Arsineh Hecobian, Amy Sullivan, Yong Zhou, Jennifer L Peel, John Volckens
Air pollution from cookstoves creates a substantial human and environmental health burden. A disproportionate fraction of emissions can occur during stove ignition (startup) compared to main cooking, yet startup material emissions are poorly quantified. Laboratory tests were conducted to measure emissions from startups using kerosene, plastic bags, newspaper, fabric, food packaging, rubber tire tubes, kindling, footwear, and wood shims. Measured pollutants included: fine particulate matter mass (PM2.5 ), PM2...
August 6, 2018: Environmental Science & Technology
Siaka S Diarra
The increase demand for poultry products has had direct effect on the supply and price of feed. This has increased research interest into the potential of locally available, less competed and low cost materials as feed ingredients. Several peels from roots/tubers and fruits have been evaluated in poultry diets but recommendations have not been consistent. High fibre, low nutrient density and likely presence of antinutritional factors limit the efficient utilisation of peel meal by poultry. Plant cultivar, age, agronomic practices, method of peel processing, breed and age of poultry all affect the inclusion level of peel meal in poultry diets...
July 15, 2018: Journal of Animal Physiology and Animal Nutrition
Orlando Campolo, Asma Cherif, Michele Ricupero, Gaetano Siscaro, Kaouthar Grissa-Lebdi, Agatino Russo, Lorena M Cucci, Patrizia Di Pietro, Cristina Satriano, Nicolas Desneux, Antonio Biondi, Lucia Zappalà, Vincenzo Palmeri
A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has been fixed in the paper.
July 13, 2018: Scientific Reports
Catherine E Slavik, Sheila Kalenge, Paul A Demers
OBJECTIVES: The goal of this study was to leverage data from two environmental regulatory initiatives, Ontario's Toxics Reduction Act (TRA) and Canada's National Pollutant Release Inventory (NPRI), to assess their ability to monitor trends in the use and emission of carcinogens by industry sector in Ontario. METHODS: Data reported to the TRA and NPRI by industrial facilities in Ontario were retrieved from 2011 to 2015. Twenty-six known and suspected carcinogens were identified (IARC) and the trends in the use and emission were evaluated by industry sector...
May 29, 2018: Canadian Journal of Public Health. Revue Canadienne de Santé Publique
Shu Wang, Li Shuai, Basudeb Saha, Dionisios G Vlachos, Thomas H Epps
We report a new and robust strategy toward the development of high-performance pressure sensitive adhesives (PSAs) from chemicals directly obtained from raw biomass deconstruction. A particularly unique and translatable aspect of this work was the use of a monomer obtained from real biomass, as opposed to a model compound or lignin-mimic, to generate well-defined and nanostructure-forming polymers. Herein, poplar wood depolymerization followed by minimal purification steps (filtration and extraction) produced two aromatic compounds, 4-propylsyringol and 4-propylguaiacol, with high purity and yield...
June 27, 2018: ACS Central Science
Laura C Valk, Jeroen Frank, Pilar de la Torre-Cortes, Max van 't Hof, Antonius J A van Maris, Jack T Pronk, Mark C M van Loosdrecht
Agricultural residues such as sugar beet pulp and citrus peel are rich in pectin, which contains galacturonic acid as a main monomer. Pectin-rich residues are underexploited as feedstocks for production of bulk chemicals or biofuels. Anaerobic, fermentative conversion of d-galacturonate in anaerobic chemostat enrichment cultures provides valuable information towards valorisation of these pectin-rich feedstocks. Replicate anaerobic chemostat enrichments, with d-galacturonate as sole limiting carbon source and inoculum from cow rumen content and rotting orange peels, yielded stable microbial communities, which were dominated by a novel Lachnospiraceae species, for which the name " Candidatus Galacturonibacter soehngenii" was proposed...
June 29, 2018: Applied and Environmental Microbiology
Georgiana Sandu, Michael Coulombier, Vishank Kumar, Hailu G Kassa, Ionel Avram, Ran Ye, Antoine Stopin, Davide Bonifazi, Jean-François Gohy, Philippe Leclère, Xavier Gonze, Thomas Pardoen, Alexandru Vlad, Sorin Melinte
A tri-dimensional interweaving kinked silicon nanowires (k-SiNWs) assembly, with a Ni current collector co-integrated, is evaluated as electrode configuration for lithium ion batteries. The large-scale fabrication of k-SiNWs is based on a procedure for continuous metal assisted chemical etching of Si, supported by a chemical peeling step that enables the reuse of the Si substrate. The kinks are triggered by a simple, repetitive etch-quench sequence in a HF and H2 O2 -based etchant. We find that the inter-locking frameworks of k-SiNWs and multi-walled carbon nanotubes exhibit beneficial mechanical properties with a foam-like behavior amplified by the kinks and a suitable porosity for a minimal electrode deformation upon Li insertion...
June 28, 2018: Scientific Reports
Ratna Frida Susanti, Gerardus Kevin, Marcelinus Erico, Arenst Andreas, Hans Kristianto, Tony Handoko
Hydrochar from the hydrothermal treatment of biomass is considered as a potential precursor for activated carbons (AC) which has been widely utilized not only for adsorbents but also for energy storage application. The advantages of hydrochar from hydrothermal treatment include its high Oxygenated Functional Group (OFG) and high porosity. The authors have been working on the biomass conversion for energy storage application. In our study, salacca peel was used as a biomass source. In previous research for the preparation of AC, conventional carbonization and activation methods were used, resulting in a high surface area of AC...
October 1, 2018: Journal of Nanoscience and Nanotechnology
Renan Aparecido Fernandes, Andresa Aparecida Berretta, Elina Cassia Torres, Andrei Felipe Moreira Buszinski, Gabriela Lopes Fernandes, Carla Corrêa Mendes-Gouvêa, Francisco Nunes de Souza-Neto, Luiz Fernando Gorup, Emerson Rodrigues de Camargo, Debora Barros Barbosa
The phytosynthesis of metal nanoparticles is nowadays attracting the increased attention of researchers and is much needed given the worldwide matter related to environmental contamination. The antimicrobial activity of colloidal and spray formulation of silver nanoparticles (AgNPs) synthesized by pomegranate peel extract against Candida albicans and Staphylococcus aureus , and their cytotoxicity in mammalian cells were tested in the present study. Dry matter, pH, total phenolics, and ellagic acid in the extract were determined...
June 26, 2018: Antibiotics
Caroline H Lescano, Fernando Freitas de Lima, Camila B Mendes-Silvério, Alberto F O Justo, Débora da Silva Baldivia, Cristiano P Vieira, Eliana J Sanjinez-Argandoña, Claudia A L Cardoso, Fabíola Z Mónica, Ivan Pires de Oliveira
Campomanesia adamantium is a medicinal plant of the Brazilian Cerrado. Different parts of its fruits are used in popular medicine to treat gastrointestinal disorders, rheumatism, urinary tract infections and inflammations. Despite its widespread use by the local population, the mechanisms involving platelet aggregation and the inhibition of cyclooxygenase by C. adamantium are unknown. This study evaluated the chemical composition, antioxidant activities and potential benefits of the C. adamantium peel extract (CAPE) and its components in the platelet aggregation induced by arachidonic acid in platelet-rich plasma...
2018: Frontiers in Pharmacology
Rui Shi, Huan Geng, Jingshuang Zhang, Wei Tian
5-20 wt% trimethoxysilylpropyl octadecyldimethyl ammonium chloride (QAS) was used to modify Poly (ε-caprolactone) (PCL)-gelatin hybrid to fabricate non-leaching antibacterial nanofiber membranes (PG-Q) by electrospinning. The results from scanning electron microscopy (SEM) and transmission electron microscopy (TEM) indicated that the QAS leaded to phase separation between the QAS and PCL. Hydrophilic test demonstrated that the PG-Q nanofiber membranes had hydrophobic surface, which was help for peeling off the dressing from the wound...
March 1, 2018: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
Rock Keey Liew, Elfina Azwar, Peter Nai Yuh Yek, Xin Yi Lim, Chin Kui Cheng, Jo-Han Ng, Ahmad Jusoh, Wei Haur Lam, Mohd Danial Ibrahim, Nyuk Ling Ma, Su Shiung Lam
A micro-mesoporous activated carbon (AC) was produced via an innovative approach combining microwave pyrolysis and chemical activation using NaOH/KOH mixture. The pyrolysis was examined over different chemical impregnation ratio, microwave power, microwave irradiation time and types of activating agents for the yield, chemical composition, and porous characteristic of the AC obtained. The AC was then tested for its feasibility as textile dye adsorbent. About 29 wt% yield of AC was obtained from the banana peel with low ash and moisture (<5 wt%), and showed a micro-mesoporous structure with high BET surface area (≤1038 m2 /g) and pore volume (≤0...
June 19, 2018: Bioresource Technology
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