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https://www.readbyqxmd.com/read/29457726/a-robust-oil-in-oil-emulsion-for-the-nonaqueous-encapsulation-of-hydrophilic-payloads
#1
Xiaocun Lu, Joshua S Katz, Adam Schmitt, Jeffrey S Moore
Compartmentalized structures widely exist in cellular systems (organelles) and perform essential functions in smart composite materials (microcapsules, vasculatures, and micelles) to provide localized functionality and enhance materials compatibility. An entirely water-free compartmentalization system is of significant value to the materials community as nonaqueous conditions are critical to packaging microcapsules with water-free hydrophilic payloads while avoiding energy-intensive drying steps. Few nonaqueous encapsulation techniques are known, especially when considering just the scalable processes that operate in batch mode...
February 19, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29457311/bicuspid-axial-wall-height-effect-on-cad-cam-crown-fracture-mode-on-preparations-containing-advanced-total-occlusal-convergence
#2
Matthew Miller, Nicholas DuVall, John Brewster, Michael N Wajdowicz, Ashley Harris, Howard W Roberts
PURPOSE: To evaluate bicuspid axial wall height effect on the fracture mode of adhesively luted, all-ceramic CAD/CAM crowns with a 20° total occlusal convergence (TOC). MATERIALS AND METHODS: Recently extracted premolars were randomly divided into 4 groups (n = 12) with all-ceramic crown preparations accomplished using a high-speed handpiece inserted into a milling device. Specimens were prepared containing occlusogingival axial wall heights of 3, 2, and 1 mm as well as a group containing a flat preparation surface with no axial wall height...
February 18, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29455150/fixed-bed-column-study-for-water-defluoridation-using-neem-oil-phenolic-resin-treated-plant-bio-sorbent
#3
Suvendu Manna, Prosenjit Saha, Debasis Roy, Basudam Adhikari, Papita Das
Fluoride has both detrimental and beneficial effects on living beings depending on the concentration and consumption periods. The study presented in this article investigated the feasibility of using neem oil phenolic resin treated lignocellulosic bio-sorbents for fluoride removal from water through fixed bed column study. Results indicated that treated bio-sorbents could remove fluoride both from synthetic and groundwater with variable bed depth, flow rate, fluoride concentration and column diameter. Data obtained from this study indicated that columns with the thickest bed, lowest flow rate, and fluoride concentration showed best column performance...
February 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29453496/influence-of-surface-treatment-on-the-performance-of-silorane-based-composite-resin-in-class-i-restorations-a-randomized-clinical-trial
#4
Isabella Pereira Marques, Fabíola Belkiss Santos de Oliveira, João Gabriel Silva Souza, Raquel Conceição Ferreira, Claudia Silami Magalhães, Fabiana Mantovani Gomes França, Daniela Araújo Veloso Popoff
OBJECTIVES: The aim of this study was to evaluate the clinical performance of silorane-based composite restorations applied after different surface treatments. MATERIALS AND METHODS: This controlled and randomized clinical trial included 26 patients with class I restoration indications. The teeth were randomly assigned to the following treatments: control 1/G1, silorane specific self-etching adhesive (P90 self-etch primer and bond) + silorane-based composite resin (Filtek™ P90 low shrink posterior restorative); G2, 37% phosphoric acid + silorane specific self-etching adhesive + silorane-based composite resin; G3, blasting with aluminum oxide + silorane specific self-etching adhesive + silorane-based composite resin; and control 2/G4, self-etching adhesive (Adper™ SE Plus self-etch adhesive) + dimethacrylate-based composite resin (Filtek™ P60 posterior restorative)...
February 16, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29452093/autophagy-inhibition-enhances-anticancer-efficacy-of-artepillin-c-a-cinnamic-acid-derivative-in-brazilian-green-propolis
#5
Satoshi Endo, Manami Hoshi, Toshiyuki Matsunaga, Takahiro Inoue, Kenji Ichihara, Akira Ikari
Propolis, a resinous substance produced by honeybees, possesses various biological actions including anticancer activity towards tumor cells. Recently, the ethanol extract of Brazilian green propolis has been shown to induce autophagy, which is known to be induced in treatment of cancer cells with anticancer drugs, leading to cancer cell survival and decreased sensitivity to anticancer agents. In this study, we aimed to identify autophagy-inducing components of the propolis and elucidated the reciprocal relationship between anticancer cytotoxicity and protective autophagy in prostate cancer CWR22Rv1 cells...
February 13, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29451707/simultaneous-preparation-and-comparison-of-the-osteogenic-effects-of-epimedin-a-b-and-c-and-icariin-from-e-brevicornu
#6
Yani Guo, Xiufeng Wang, Jing Gao
In this study, epimedin A-, B- and C- and icariin-rich extracts were simultaneously prepared from Epimedium brevicornu Maxim (E. brevicornu) through a convenient four-stage process consisting of solvent extraction, macroporous resin column pre-concentration, extraction fractionation and reversed-phase (RP)-silica gel column chromatography. Single factor experiments and response surface methodology (RSM) were used to optimize the preparation conditions. In the final products, the purity of epimedin A, B and C and icariin were 23...
February 16, 2018: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29451649/the-effects-of-different-restorative-materials-on-periodontopathogens-in-combined-restorative-periodontal-treatment
#7
Sila Çagri Isler, Gonen Ozcan, Gülcin Akca, Zahide Kocabas
Objective The aim of the study was to evaluate the association between subgingival restorations and the target periodontopathogenic bacteria (Pg, Td and Pi) in subgingival biofilm during one year after combined restorative-periodontal treatment. Material and Methods Seventeen systemically healthy subjects, who were positive for the presence of three cervical lesions associated with gingival recessions in three different adjacent teeth, were included in the study. A total of 51 combined defects were treated with connective tissue graft plus a nanofilled composite resin (NCR+CTG), a resin-modified glass ionemer cement (RMGI+CTG) and a fluoride-releasing resin material with pre-reacted glass (PRG), called giomer (Giomer+CTG)...
2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29451119/light-triggered-interfacial-damage-self-healing-of-poly-p-phenylene-benzobisoxazole-fiber-composites
#8
Zhen Hu, Qing Shao, Yudong Huang, Long Yu, Dayu Zhang, Xirong Xu, Jing Lin, Hu Liu, Zhanhu Guo
The interfacial microcracks in the resin matrix composites are difficult to be detected and repaired. However, the self-healing concept provides opportunities to fabricate composites with unusual properties. In the present study, photothermal conversion Ag-Cu2S nanoparticles were immobilized onto poly(p‑phenylene benzobisoxazole) (PBO) fibers via a polydopamine chemistry. Benefit from the photothermal effects of Ag-Cu2S, the obtained PBO fibers (Ag-Cu2S-PBO) efficiently converted the light energy into heat under a Xenon lamp irradiation...
February 16, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29449021/effect-of-matrix-metalloproteinase-8-inhibitor-on-resin-dentin-bonds
#9
Qianmin Ou, Ya Hu, Siqi Yao, Yan Wang, Xuefeng Lin
OBJECTIVES: This study investigated the effect of matrix metalloproteinase 8 (MMP-8) on resin-dentin bonds, assessed the mechanical properties of the interfaces over time, and discussed the potential application of MMP-8 inhibitor I (MMP8-I) as a specific MMP-8 inhibitor to be incorporated into dental adhesives. METHODS: The activation and inhibition of MMP-8 was detected by colorimetric assay. After 1 day, 6 months and 1 year of storage of Control, MMP8-I, and chlorhexidine (CHX) groups, the microtensile bond strengths (μTBS) were used to evaluate the bond strength and failure mode distributions, and nanoleakage analysis was used to evaluate the minor scattered silver particles...
February 12, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29448760/identification-of-new-compounds-from-sage-flowers-salvia-officinalis-l-as-markers-for-quality-control-and-the-influence-of-the-manufacturing-technology-on-the-chemical-composition-and-antibacterial-activity-of-sage-flower-extracts
#10
Sebastian Gericke, Tilo Lübken, Diana Wolf, Martin Kaiser, Christian Hannig, Karl Speer
Parts of Salvia species such as its flowers and leaves are currently used as a culinary herb and for some medicinal applications. To distinguish the different sage extracts it is necessary to analyze their individual chemical compositions. Their characteristic compounds might be established as markers to differentiate between sage flowers and leaf extracts or to determine the manufacturing technology and storage conditions. Tri-p-coumaroylspermidine can be detected only in flowers and has been described here for Salvia and Lavandula species for the first time...
February 16, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29448579/resin-bonding-to-type-iv-gold-alloy-conditioned-with-a-novel-mercapto-silane-system-effect-of-incorporation-of-a-phosphate-monomer
#11
Sung-Min Kwon, Bong Ki Min, Jun Sik Son, Tae-Yub Kwon
Self-assembled monolayers of thiols have been used to link a range of materials to planar gold surfaces or gold nanoparticles in nanoscience and nanotechnology. Novel mercapto silane systems are a promising alternative to dental noble metal alloys for enhanced resin bonding durability Goldbased alloys for full-cast restorations contain various base metal elements, which may bond to acidic functional monomers chemically, in addition to noble metal elements. This study examined how the additional incorporation of a phosphate monomer (di-2-hydroxyethyl methacryl hydrogenphosphate, DHP) into novel mercapto silane primer systems affected the resin bond strength to a type IV gold alloy pretreated with the primers...
February 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448562/microwave-absorption-properties-of-uniform-ultra-long-sic-nanowires
#12
Jian Wei, Qian Zhang, Lili Zhao, Zhengbo Nie, Lei Hao
The uniform ultra-long SiC nanowires (SiCNWs) were incorporated into the epoxy matrix to characterize the morphology effect on their electromagnetic wave absorption performance. The ultra-long SiCNWs with lengths of hundreds of micrometers were fabricated by chemical vapor deposition technique at 1250 °C, and have diameters of 10-60 nm with uniform morphologies. The microwave absorption performance of SiCNW/epoxy resin composites was investigated in the range of 8-18 GHz. Significant absorbing properties were discovered in the composites at frequencies of 8-12...
February 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448554/conductive-adhesive-based-on-mussel-inspired-graphene-decoration-with-silver-nanoparticles
#13
Marcello Casa, Maria Sarno, Rosalba Liguori, Claudia Cirillo, Alfredo Rubino, Emanuele Bezzeccheri, Johan Liu, Paolo Ciambelli
Decoration with silver nanoparticles was obtained by coating graphene with a polydopamine layer, able to induce spontaneous metallic nanoparticles formation without any specific chemical interfacial modifier, neither using complex instrumentation. The choice of dopamine was inspired by the composition of adhesive proteins in mussels, related to their robust attach to solid surfaces. The synthesis procedure started from graphite and involved eco-friendly compounds, such as Vitamin C and glucose as reducing agent and water as reaction medium...
February 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448191/novel-arrangement-for-an-electro-fenton-reactor-that-does-not-require-addition-of-iron-acid-and-a-final-neutralization-stage-towards-the-development-of-a-cost-effective-technology-for-the-treatment-of-wastewater
#14
Dennys Fernández, Irma Robles, Francisco J Rodríguez-Valadez, Luis A Godínez
A novel arrangement for an electro-Fenton reactor aimed to treat neutral wastewater is presented. The arrangement consists on three-compartments in series, two of them packed with a cation exchange resin and one positioned between these, containing a polarized activated carbon column where the electrochemical generation of the Fenton reagent takes place. While the hydroxyl radicals electrochemically produced in-situ, react with the pollutant species adsorbed on the activated carbon cathode, the resin compartments administrate and collect the iron cation and the hydrated proton species in alternating flow direction cycles...
February 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/29448165/y90-radioembolization-dosimetry-using-a-simple-semi-quantitative-method-in-intrahepatic-cholangiocarcinoma-glass-versus-resin-microspheres
#15
Nariman Nezami, Nima Kokabi, Juan C Camacho, David M Schuster, Minzhi Xing, Hyun S Kim
INTRODUCTION: There are two different types of Y90 Microspheres, glass and resin, in the market for Y90 radioembolization (Y90-RE). This study aimed to investigate the dose of radiation delivered through glass vs. resin-based Y90-RE to intrahepatic cholangiocarcinoma (ICC). METHODS: In this retrospective study, 10 patients with ICC underwent Y90-RE, five underwent glass (Glass group) and other 5 resin (Resin group) microspheres. Technetium-99m macro-aggregated albumin (Tc-99m MAA) shunt study was performed two weeks before Y90-RE...
January 16, 2018: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/29448078/resin-glycosides-from-the-seeds-of-ipomoea-muricata-and-their-multidrug-resistance-reversal-activities
#16
Wen-Qiong Wang, Shan-Shan Liu, Wei-Bin Song, Jun Li, Li-Jiang Xuan
Resin glycosides represent an important chemotaxonomic marker of the Convolvulaceae family and possess multidrug resistance (MDR) reversal activity. In our recent study, nine previously undescribed resin glycosides, Calonyctins B-J, were isolated from the seeds of Ipomoea muricata. Their structures with the absolute configuration were established on the basis of comprehensive spectroscopic analysis and chemical methods. Among these, Calonyctins F-I possessed a skeleton in which the aglycone moiety and the oligosaccharide core were linked by a 3-hydroxy-2-methylbutanoic acid moiety to form a 25-membered macrocyclic structure...
February 12, 2018: Phytochemistry
https://www.readbyqxmd.com/read/29447057/effect-of-resin-infiltration-and-microabrasion-on-the-microhardness-surface-roughness-and-morphology-of-incipient-carious-lesions
#17
Basak Yazkan, R Banu Ermis
OBJECTIVE: The effects of resin infiltration and microabrasion on incipient carious lesions by surface microhardness, roughness and morphological assessments, and resistance to further acid attack of treated lesions were evaluated. MATERIAL AND METHODS: Eighty artificially-induced incipient lesions were randomly divided into five groups (n = 16): resin infiltration with an adhesive resin (Excite F, Ivoclar Vivadent, Schaan, Liechtenstein), resin infiltration with a resin infiltrant (Icon, DMG, Hamburg, Germany), microabrasion without polishing (Opalustre, Ultradent, South Jordan, UT, USA), microabrasion with polishing (Opalustre, Ultradent, Diamond Excel, FGM, Joinville, SC, Brazil), and distilled water (control group)...
February 15, 2018: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/29446757/3d-bioprinting-mesenchymal-stem-cell-laden-construct-with-core-shell-nanospheres-for-cartilage-tissue-engineering
#18
Wei Zhu, Haitao Cui, Benchaa Boualam, Fahed Masood, Erin Flynn, Raj Rao, Zhiyong Zhang, Lijie Grace Zhang
Cartilage tissue is prone to degradation and has little capacity for self-healing due to its avascularity. Tissue engineering, which provides artificial scaffolds to repair injured tissues, is a novel and promising strategy for cartilage repair. 3D bioprinting offers even greater potential for repairing degenerative tissue by simultaneously integrating living cells, biomaterials, and biological cues to provide a customized scaffold. With regard to cell selection, mesenchymal stem cells (MSCs) hold great capacity for differentiating into a variety of cell types, including chondrocytes, and could therefore be utilized as a cartilage cell source in 3D bioprinting...
February 15, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29446619/synthesis-of-cyclic-peptides-as-potential-anti-malarials
#19
Catherine Fagundez, Diver Sellanes, Gloria Lourdes Serra
The results from the synthesis of peptides by Fmoc/SPPS on a 2-CTC resin and then lactamization in solution or solid phase for the preparation of cyclopeptides are presented. Both procedures allow the synthesis of the desired compounds in good to very good yield and with high cyclization efficiency for on-resin macrocyclization. In addition, the activities of the corresponding cyclopeptides against the chloroquine-resistant K1 strain of Plasmodium falciparum were evaluated. Cyclo-Cys(Trt)-Gly-Thr(tBu)-Gly-Cys(Trt)-Gly showed potent in vitro and selective activity against this parasite, EC50 = 28 nM...
February 15, 2018: ACS Combinatorial Science
https://www.readbyqxmd.com/read/29446119/pancreaticoduodenal-arterial-arcades-their-dominance-and-variations-their-potential-clinical-relevance
#20
András Szuák, Károly Németh, Csaba Korom, Endre Gáti, Kinga Karlinger, László Harsányi, Ágnes Nemeskéri
INTRODUCTION: The complex arterial system makes pancreatic interventions technically challenging for surgeons, and interventional radiologists. The arterial variants may alter tumor resecability, and cause complications in arterial embolization. International data on pancreatic blood supply are variable; therefore, we aimed to determine the frequency of variants of pancreaticoduodenal arterial arcades. MATERIALS AND METHODS: Arteries of human abdominal organ complexes (50) were injected with resin mixture, and then corroded...
February 15, 2018: Clinical Anatomy
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