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https://www.readbyqxmd.com/read/30311331/wafer-scale-fabrication-of-ultrathin-flexible-electronic-systems-via-capillary-assisted-electrochemical-delamination
#1
Heng Zhang, Youdi Liu, Chao Yang, Li Xiang, Youfan Hu, Lian-Mao Peng
Electronic systems on ultrathin polymer films are generally processed with rigid supporting substrates during fabrication, followed by delamination and transfer to the targeted working areas. The challenge associated with an efficient and innocuous delamination operation is one of the major hurdles toward high-performance ultrathin flexible electronics at large scale. Herein, a facile, rapid, damage-free approach is reported for detachment of wafer-scale ultrathin electronic foils from Si wafers by capillary-assisted electrochemical delamination (CAED)...
October 11, 2018: Advanced Materials
https://www.readbyqxmd.com/read/30292586/pyrus-pyrifolia-fruit-peel-as-sustainable-source-for-spherical-and-porous-network-based-nanocellulose-synthesis-via-one-pot-hydrolysis-system
#2
You Wei Chen, Muhammad Ariff Hasanulbasori, Phang Fung Chiat, Hwei Voon Lee
In this paper, we have attempted to the revalorization of pear (Pyrus pyrifolia L.) peel residue and converting them into high value-added products remains limited. A green and facile one-pot isolation procedure was designed for simplifying the isolation of nanocellulose directly from pear peel residue. The one-pot approach employed in this work is interesting as the reaction involved less harmful chemicals and multiple steps. The reaction was carried out by adding hydrogen peroxide as an oxidant and chromium (III) nitrate as a catalyst in the acidic medium under mild process conditions...
October 4, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/30287023/chemical-characteristics-antioxidant-capacities-and-hepatoprotection-of-polysaccharides-from-pomegranate-peel
#3
Xichuan Zhai, Caiping Zhu, Yang Zhang, Jingru Sun, Aamina Alim, Xingbin Yang
This proposed work aimed to investigate the chemical characteristic, antioxidant capacities and hepatoprotection effect of pomegranate peel polysaccharides (PPP) on CCl4 -induced oxidative damage in mice. PPP was identified as the acidic heteropolysaccharides by HPLC methods. In vitro test showed that PPP had excellent reducing power and scavenging effects against free radicals. Administration of PPP (50, 100 and 200 mg/kg·bw) in mice before the injection of CCl4 could observably antagonize the increased serum alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase and hepatic malonaldehyde level in CCl4 -induced mice, especially administrated with 200 mg/kg·bw of PPP...
December 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/30274104/antimicrobial-and-toxicological-behavior-of-montmorillonite-immobilized-metal-nanoparticles
#4
Anasuya Roy, Mangala Joshi, B S Butola, Sahil Malhotra
With increasing demand for novel and potent antimicrobial agents to combat cross-infections and infectious diseases, silver and copper based nanoparticles (NPs) deposited over supports such as montmorillonite (MMT) are playing a crucial role in shaping the current research scenario. Although materials based on Ag NP and Cu NP on MMT have been reported, its toxicological properties on human cell lines have not been accounted for. This paper reports a comparative study on synthesis, antibacterial, antifungal and toxicological behavior of Ag and Cu NPs deposited over MMT nanosheets synthesized by employment of different reduction media...
December 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/30263788/characterization-of-pectin-extracted-from-banana-peels-of-different-varieties
#5
Phaviphu Khamsucharit, Kamlai Laohaphatanalert, Paiboolya Gavinlertvatana, Klanarong Sriroth, Kunruedee Sangseethong
Pectins were extracted from banana peels of five different varieties using citric acid solution. The chemical characteristics of banana peel pectins were investigated and compared with citrus peel and apple pomace pectins which were extracted under the same extraction conditions to assess the potential of banana peels as an alternative source of commercial pectin. The yield of banana peel pectins ranged from 15.89 to 24.08%. The extracted banana peel pectins were categorized as high methoxyl pectin with the degree of esterification between 63...
June 2018: Food Science and Biotechnology
https://www.readbyqxmd.com/read/30260319/efficacy-of-silver-based-gel-compared-with-fusidic-acid-cream-in-topical-treatment-following-trichloroacetic-acid-facial-skin-peeling-a-pilot-study
#6
Geva Landau, Sami Gabario, Shaked Menashe, Hodaya Saadon, Lior Heller
BACKGROUND: Trichloroacetic acid (TCA) is a nontoxic chemical that has been used for more than 20 years in skin rejuvenation treatments for various skin conditions. Currently, there is no single accepted protocol for local burn care following TCA peeling. OBJECTIVE: This pilot study assesses the efficacy and tolerability of a silver-based gel compared with fusidic acid cream as a complementary topical treatment for burns following TCA peeling. MATERIALS AND METHODS: The authors conducted a comparative study on healthy female patients in the Department of Plastic and Reconstructive Surgery at Assaf Harofe Medical Center (Zerifin, Israel)...
September 19, 2018: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/30258585/chemical-composition-and-antimicrobial-activity-of-gannan-navel-orange-citrus-sinensis-osbeck-cv-newhall-peel-essential-oils
#7
Qingyun Guo, Ke Liu, Weihui Deng, Balian Zhong, Wenxia Yang, Jiong Chun
The present investigation reported the chemical composition of cold pressed Gannan navel orange peel essential oil (EO) and its molecular distillation fraction (light phase EO), and examined their antimicrobial activity against spoiling and pathogenic microorganisms. Gas chromatography-mass spectrometry analysis identified 27 and 20 different chemical constituents in cold pressed EO and light phase EO, respectively. Limonene was the major constituent, accounting for 85.32% of cold pressed EO and 60.44% of light phase EO...
September 2018: Food Science & Nutrition
https://www.readbyqxmd.com/read/30246914/is-skin-microneedling-a-good-alternative-method-of-various-skin-defects-removal
#8
REVIEW
Kamila Zduńska, Anna Kołodziejczak, Helena Rotsztejn
Skin microneedling accelerates the process of skin regeneration through the creation of numerous microinjuries which emerge when skin is deeply punctured with very thin needles. The whole procedure evokes various reactions which can be divided into three major phases: inflammation, proliferation, and remodeling. It activates platelet growth factors which are responsible for the stimulation of fibroblasts to produce collagen and elastin. Moreover, skin breakdown enhances penetration of active ingredients. Treatment can be performed with the use of different devices, all equipped with needles of various lengths...
September 24, 2018: Dermatologic Therapy
https://www.readbyqxmd.com/read/30236944/enhanced-surface-decontamination-of-radioactive-cs-by-self-generated-strippable-hydrogels-based-on-reversible-cross-linking
#9
Hee-Man Yang, Chan Woo Park, Kune-Woo Lee
A self-generated, strippable hydrogel containing adsorbents was developed to remove the radioactive cesium from surfaces by adsorption for wide-area surface decontamination. Two aqueous polymeric solutions of polyvinyl alcohol (PVA) and phenylboronic-acid-grafted alginate (PBA-Alg) were easily applied to surfaces and subsequently self-generated a hydrogel based on the PBA-diol ester bond. Compared to the strippable coating and chemical gels, the PBA-diol ester bond-based hydrogel was easily peeled off the surfaces without a drying step due to its high elasticity, which is more practical and time saving...
January 15, 2019: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30233256/rare-chemical-injuries-a-case-of-ocular-superglue-instillation-in-port-harcourt
#10
Sotonibi Ah Cookey, Ireju O Chukwuka, Ogochukwu A Sibeudu
Background: Ocular superglue injury is uncommon all over the world. Aim: To report a case of self-inflicted accidental ocular superglue injury. Methods: A case of ocular injury is described in a 29-year-old adult, following inadvertent instillation of superglue instead of a prescribed steroid ointment into the right eye, in the dark. Results: There was matting of the upper and lower lid margin and eyelashes precluding view of the ocular structures...
2018: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/30214663/a-practical-approach-to-chemical-peels-a-review-of-fundamentals-and-step-by-step-algorithmic-protocol-for-treatment
#11
Teo Soleymani, Julien Lanoue, Zakia Rahman
Background: Chemoexfoliation, also known as chemical peeling, is a method of targeted cutaneous ablation using specific caustic agents that allow for rapid, predictable, and uniform thickness of chemoablation to a desired cutaneous depth, ultimately resulting in an improved appearance of skin. Objective: In this review, we provide an up-to-date analysis of all currently available chemical peels for dermatologic use, as well as a step-by-step instructional protocol for an algorithmic approach to treatment. Methods: A comprehensive search of the Cochrane Library, MEDLINE, and PUBMED databases was performed to identify relevant literature investigating chemical peeling agents...
August 2018: Journal of Clinical and Aesthetic Dermatology
https://www.readbyqxmd.com/read/30213060/chemical-characterization-of-opuntia-ficus-indica-l-mill-hydroalcoholic-extract-and-its-efficiency-against-gastrointestinal-nematodes-of-sheep
#12
Carolina Santos, Luciano Henrique Campestrini, Douglas Luis Vieira, Izanara Pritsch, Fábio Tomio Yamassaki, Selma Faria Zawadzki-Baggio, Juliana Bello Baron Maurer, Marcelo Beltrão Molento
Opuntia ficus-indica (L.) Mill. is a xerophylous plant that originated in tropical and subtropical America. This plant is popularly known in Brazil as "palma forrageira" (cactus pear) and plays a fundamental role in animal nutrition, mainly in the Northeastern semi-arid region of the country. The plant has several uses since it presents bioactive compounds that confer biological and pharmacological properties. In this context, the cactus pear can also be considered a potential product to combat parasite infections...
September 12, 2018: Veterinary Sciences
https://www.readbyqxmd.com/read/30174083/buriti-mauritia-flexuosa-l-f-fruit-by-products-flours-evaluation-as-source-of-dietary-fibers-and-natural-antioxidants
#13
Laís M Resende, Adriana S Franca, Leandro S Oliveira
Buriti by-products flours were evaluated as sources of dietary fibers and natural antioxidants. All flours presented chemical characteristics that allowed classification as high dietary fiber powders. Presence of pectic polysaccharides, arabinoxylans and xyloglucans was inferred by the neutral monosaccharides profile. Peels and defatted pulp flours are highlighted as those with higher antioxidant potential (total extractable polyphenols and antioxidant activities by DPPH and FRAP) compared to endocarp and manually-produced bran flours...
January 1, 2019: Food Chemistry
https://www.readbyqxmd.com/read/30146730/comparative-study-of-fractional-erbium-yag-laser-vs-combined-therapy-with-topical-steroid-as-an-adjuvant-treatment-in-melasma
#14
Hamza Abdel-Raouf Mohamed, Ghada Ali Nasif, Eman Saad Abdel-Azim, Mira Abd El-Fatah Ahmed
BACKGROUND: Melasma is an acquired disorder of symmetrical hyperpigmentation. Several treatment methods are available for patients with melasma, including topical compounds, broad-spectrum photoprotection, camouflage, chemical peels, and laser and light therapies which represent potentially promising options for patients who are refractory to other modalities. OBJECTIVE: To evaluate and compare the clinical, histopathological, and immunohistochemical changes in melasma after fractional Er:YAG laser versus fractional Er:YAG laser and topical steroids...
August 26, 2018: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/30138491/update-on-acne-scar-treatment
#15
Yssra S Soliman, Rebecca Horowitz, Peter W Hashim, John K Nia, Aaron S Farberg, Gary Goldenberg
Acne vulgaris and postacne scarring are common in the general population. Even after lesions have resolved, scarring can lead to detrimental psychologic effects and can negatively impact patients' quality of life. Fortunately, there have been several recent advances in therapeutic options to treat acne scarring. This article discusses these treatments with a focus on microneedling, lasers, chemical peels, and dermal fillers.
July 2018: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/30135372/using-oxygen-plasma-pretreatment-to-enhance-the-properties-of-f-doped-zno-films-prepared-on-polyimide-substrates
#16
Chih-Cheng Chen, Fang-Hsing Wang, Sheng-Cheng Chang, Cheng-Fu Yang
In this study, a radio frequency magnetron sputtering process was used to deposit F-doped ZnO (FZO) films on polyimide (PI) substrates. The thermal expansion effect of PI substrates induces distortion and bending, causing FZO films to peel and their electrical properties and crystallinity to deteriorate. To address these shortcomings, oxygen (O₂) plasma was used to pretreat the surface of PI substrates using a plasma-enhanced chemical vapor deposition system before the FZO films were deposited. The effects of O₂ plasma pretreatment time on the surface water contact angle, surface morphologies, and optical properties of the PI substrates were investigated...
August 22, 2018: Materials
https://www.readbyqxmd.com/read/30128235/highly-adaptable-and-biocompatible-octopus-like-adhesive-patches-with-meniscus-controlled-unfoldable-3d-microtips-for-underwater-surface-and-hairy-skin
#17
Sangyul Baik, Jiwon Kim, Heon Joon Lee, Tae Hoon Lee, Changhyun Pang
Adhesion capabilities of various skin architectures found in nature can generate remarkable physical interactions with their engaged surfaces. Among them, octopus suckers have unique hierarchical structures for reversible adhesion in dry and wet conditions. Here, highly adaptable, biocompatible, and repeatable adhesive patches with unfoldable, 3D microtips in micropillars inspired by the rim and infundibulum of octopus suction cup are presented. The bioinspired synthetic adhesives are fabricated by controlling the meniscus of a liquid precursor in a simple molding process without any hierarchical assemblies or additional surface treatments...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/30112143/insecticidal-activity-of-grape-pomaces-from-two-grape-cultivars-against-the-housefly-musca-domestica-l-under-laboratory-conditions
#18
Abdul-Lateef Molan, Mohamad Q Balasim, Nagham Y Al-Bayati
Aqueous extracts prepared from the powdered entire pomaces and their parts (seeds and peels) of two Iraqi grape cultivars (Shada and Des-Alanez) were evaluated for their ovicidal, larvicidal, and pupicidal activities against housefly, Musca domestica (Linnaeus 1758) and compared them with chemical insecticide (Agita 10 WG; Austria). The highest insecticidal activity was shown by the aqueous extracts of powdered seeds followed by the entire pomace and then peels. The water extracts from the seeds, peels and pomaces were able to inhibit completely the hatching of the eggs at a concentration of 150 μg/ml while the Agita insecticide was able to inhibit the hatching process at a concentration of 50 μg/ml...
July 2018: Tropical Life Sciences Research
https://www.readbyqxmd.com/read/30082616/effect-of-temperature-on-the-physical-electro-chemical-and-adsorption-properties-of-carbon-micro-spheres-using-hydrothermal-carbonization-process
#19
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
https://www.readbyqxmd.com/read/30080540/research-on-the-techniques-of-ultrasound-assisted-liquid-phase-peeling-thermal-oxidation-peeling-and-acid-base-chemical-peeling-for-ultra-thin-graphite-carbon-nitride-nanosheets
#20
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
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