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https://www.readbyqxmd.com/read/28937927/the-effects-of-photobiomodulation-delivered-by-light-emitting-diode-on-stem-cells-from-human-exfoliated-deciduous-teeth-a-study-on-the-relevance-to-pluripotent-stem-cell-viability-and-proliferation
#1
Katia Llanos do Vale, Durvanei Augusto Maria, Lara Cristina Picoli, Alessandro Melo Deana, Marcelo Betti Mascaro, Raquel Agnelli Mesquita Ferrari, Sandra Kalil Bussadori, Kristianne Porta Santos Fernandes
OBJECTIVE: Photobiomodulation (PBM) can modulate the proliferation of some types of stem cells. However, few reports have addressed the effects of PBM delivered by light-emitting diode (LED) on stem cells obtained from the pulp tissue of deciduous teeth. The aim of the present study was to investigate the effect of PBM delivered by red LED (630 nm, 75 mW, 37 mW/cm(2)) with different radiant exposures on the cell cycle, mitochondrial membrane potential, and senescence of stem cells from human exfoliated deciduous teeth (SHED)...
September 21, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28937907/direct-pulp-capping-in-primary-molars-using-mineral-trioxide-aggregate-an-in-vivo-study
#2
Elzbieta Luczaj-Cepowicz, Grazyna Marczuk-Kolada, Malgorzata Pawinska, Marta Obidzinska
OBJECTIVE: To do a clinical and radiographic evaluation of the effectiveness of MTA when used as a direct pulp capping material in primary molars. STUDY DESIGN: Clinical and radiographic follow-up was performed on 30 primary molars with deep caries lesions in 30 patients from 3 to 9.75 years of age. Pulps exposed during cavity preparation were treated by direct pulp capping with MTA. The follow-up clinical and radiographic examinations were carried out at different time intervals: 6, 7-12, 13-18, 19-24, and >24 months after treatment...
September 22, 2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28937606/a-novel-nanocomposite-as-an-efficient-adsorbent-for-the-rapid-adsorption-of-ni-ii-from-aqueous-solution
#3
Xiaotao Zhang, Ximing Wang, Zhangjing Chen
A sulfhydryl-lignocellulose/montmorillonite (SLT) nanocomposite was prepared using a chemical intercalation reaction. The SLT nanocomposite was characterized by Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Transmission Electron Microscopy (TEM), the results demonstrated that an intercalated-exfoliated nanostructure was formed in the SLT nanocomposite. Batch experiments were conducted to optimize parameters such as SLT nanocomposite dosage, the initial concentration of Ni(II), solution pH, temperature, and time...
September 22, 2017: Materials
https://www.readbyqxmd.com/read/28934098/ultrahigh-performance-heat-spreader-based-on-gas-liquid-exfoliation-boron-nitride-nanosheets
#4
Jiheng Ding, Hongran Zhao, Qiaolei Wang, Wanjun Peng, Haibin Yu
Due to its high thermal conductivity, insulation performance, boron nitride nanosheets (BNNS) have a great promising to fabricate thermal management equipments for application in power electronics. Liquid-phase exfoliation route has been regarded as the most commonly used approach to produce single and few-layered BNNS for many research fileds. However, this process has been slow, and the production yield is extremely low. In this work, an efficient technique to obtain few-layered (mostly < 5 layers), high-yield (~33%), and plane-defect-free BNNS by the combination of liquid N2 (L-N2) gasification and liquid exfoliation was developed...
September 21, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28933474/exfoliation-of-graphene-and-fluorographene-in-molecular-and-ionic-liquids
#5
Émilie Bordes, Joanna Szala-Bilnik, Agílio A H Pádua
We use molecular dynamics simulations to study the exfoliation of graphene and fluorographene in molecular and ionic liquids, by performing computer experiments in which one layer of the 2D nanomaterial is peeled from a stack, in vacuum and in the presence of solvent. The liquid media and the nanomaterials are represented by fully flexible, atomistic force fields. From these simulations we calculate the potential of mean force, or reversible work, required to exfoliate the materials. Calculations in water and organic liquids showed that small amides (NMP, DMF) are among the best solvents for exfoliation, in agreement with the experiment...
September 21, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28933461/decoration-of-exfoliated-black-phosphorus-with-nickel-nanoparticles-and-its-application-in-catalysis
#6
Maria Caporali, Manuel Serrano-Ruiz, Francesca Telesio, Stefan Heun, Giuseppe Nicotra, Corrado Spinella, Maurizio Peruzzini
Nickel nanoparticles were dispersed on the surface of exfoliated black phosphorus and the resulting nanohybrid Ni/2DBP showed an improved stability with respect to pristine 2D BP when kept under ambient conditions in the dark. Ni/2DBP was applied as a catalyst in the semihydrogenation of phenylacetylene and exhibited high conversion and selectivity towards styrene. These features were preserved after recycling tests revealing the high stability of the nanohybrid.
September 21, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28933294/biodegradable-black-phosphorus-based-nanomaterials-in-biomedicine-theranostic-applications
#7
Zhen Wang, Zhiming Liu, Chengkang Su, Biwen Yang, Xixi Fei, Yi Li, Yuqing Hou, Henan Zhao, Yanxian Guo, Zhengfei Zhuang, Huiqing Zhong, Zhouyi Guo
Ascribe to the unique two-dimensional planar nanostructure with exceptional physical and chemical properties, black phosphorous (BP) as the emerging inorganic two-dimensional nanomaterial with high biocompatibility and degradability has been becoming one of the most promising materials of great potentials in biomedicine. The exfoliated BP sheets possess ultra-high surface area available for valid bio-conjugation and molecular loading for chemotherapy. Utilizing the intrinsic near-infrared optical absorbance, BP-based photothermal therapy in vivo, photodynamic therapy and biomedical imaging has been realized, achieving unprecedented anti-tumor therapeutic efficacy in animal experiments...
September 20, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28932126/dermopathy-associated-with-cetuximab-and-panitumumab-investigation-of-the-usefulness-of-moisturizers-in-its-management
#8
Shoichi Watanabe, Motoki Nakamura, Hiroki Takahashi, Masayasu Hara, Kei Ijichi, Daisuke Kawakita, Akimichi Morita
AIMS: Limited data regarding the objective evaluation of skin exsiccation caused by epidermal growth factor receptor (EGFR) inhibitors exist. Objective indices were applied to evaluate the usefulness of a moisturizer against skin exsiccation associated with the use of EGFR inhibitors in cancer patients. PATIENTS AND METHODS: Patients with either colorectal or head and neck cancer treated with either cetuximab or panitumumab were randomly assigned 1:2 to the prophylactic-treatment arm, where participants received prophylactical moisturizer treatment (heparinoid preparation, Hirudoid(®)), or to the symptomatic-treatment arm, where moisturizer was applied after the onset of cutaneous symptoms...
2017: Clinical, Cosmetic and Investigational Dermatology
https://www.readbyqxmd.com/read/28932031/cytomorphometric-analysis-of-gingival-epithelium-and-buccal-mucosa-cells-in-type-2-diabetes-mellitus-patients
#9
Manisha Sahu, Hema Suryawanshi, Sushruth Nayak, Pramod Kumar
BACKGROUND: The global prevalence of type 2 diabetes continues to rise. Interest has been increasing recently in noninvasive diagnostic procedure. Hence, an attempt has been made by the present study to analyze the changes in cytomorphometry in exfoliated buccal and gingival mucosa cells in type 2 diabetic patients. AIM: The aim of this study was to analyze the cytomorphometric changes in exfoliated cells of gingiva and buccal mucosa as an adjunct to diagnosis of diabetes...
May 2017: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/28931877/laser-plasma-driven-synthesis-of-carbon-based-nanomaterials
#10
M Barberio, P Antici
In this paper we introduce a laser-plasma driven method for the production of carbon based nanomaterials and in particular bi- and few-layers of Graphene. This is obtained by using laser-plasma exfoliation of amorphous Graphite in a liquid solution, employing a laser with energy in the order of 0.5 J/mm(2). Raman and XPS analysis of a carbon colloidal performed at different irradiation stages indicate the formation of Graphene multilayers with an increasing number of layers: the amount of layers varies from a monolayer obtained in the first few seconds of the laser irradiation, up to two layers obtained after 10 s, and finally to Graphite and amorphous carbon obtained after 40 s of irradiation...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28930635/immobilization-of-reduced-graphene-oxide-on-hydrogen-terminated-silicon-substrate-as-a-transparent-conductive-protector
#11
Yudi Tu, Toru Utsunomiya, Sho Kokufu, Masahiro Soga, Takashi Ichii, Hiroyuki Sugimura
Silicon is a promising electrode material for photoelectrochemical and photocatalytic reaction. However, the chemically active surface of silicon will be easily oxidized when exposed to the oxidation environment. We immobilized graphene oxide (GO) onto hydrogen-terminated silicon (H-Si) and reduced it through ultraviolet (UV) and vacuum-ultraviolet (VUV) irradiation. This acted as an ultrathin conductive layer to protect H-Si from oxidation. The elemental evolution of GO was studied by X-ray photoelectron spectroscopy and it was found that GO was partially reduced soon after the deposition onto H-Si and further reduced after UV or VUV light irradiation...
September 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28930344/electron-dynamics-in-mos2-graphite-heterostructures
#12
Xinwu Zhang, Dawei He, Lixin Yi, Siqi Zhao, Jiaqi He, Yongsheng Wang, Hui Zhao
The electron dynamics in heterostructures formed by multilayer graphite and monolayer or bulk MoS2 were studied by femtosecond transient absorption measurements. Samples of monolayer MoS2-multilayer graphite and bulk MoS2-multilayer graphite were fabricated by exfoliation and dry transfer techniques. Ultrafast laser pulses were used to inject electron-hole pairs into monolayer or bulk MoS2. The transfer of these photocarriers to the adjacent multilayer graphite was time resolved by measuring the differential reflection of a probe pulse...
September 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28928798/regulatory-roles-of-mirna-758-and-matrix-extracellular-phosphoglycoprotein-in-cervical-cancer
#13
Xianhua Meng, Yinghui Zhao, Jinyun Wang, Zheng Gao, Qingxia Geng, Xiaoxia Liu
The present study aimed to examine the role and underlying mechanism of miRNA-758 (miR-758) expression in cancer tissues, blood and cervical exfoliated cells from patients with cervical cancer. A total of 49 patients with cervical cancer and 26 healthy people for cervical cancer screening were included in the present study. The patients with cervical cancer were treated with resection, and the tumor and adjacent tissues, blood and cervical exfoliated cells were collected. The expression levels of miR-758 and matrix extracellular phosphoglycoprotein (MEPE) mRNA in each sample were detected by reverse transcription-quantitative polymerase chain reaction...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28926230/formation-and-characterization-of-hydrogen-boride-sheets-derived-from-mgb2-by-cation-exchange
#14
Hiroaki Nishino, Takeshi Fujita, Nguyen Thanh Cuong, Satoshi Tominaka, Masahiro Miyauchi, Soshi Iimura, Akihiko Hirata, Naoto Umezawa, Susumu Okada, Eiji Nishibori, Asahi Fujino, Tomohiro Fujimori, Shin-Ichi Ito, Junji Nakamura, Hideo Hosono, Takahiro Kondo
Two-dimensional (2D) materials are promising for applications in a wide range of fields because of their unique properties. Hydrogen boride sheets, a new 2D material recently predicted from theory, exhibit intriguing electronic and mechanical properties as well as hydrogen storage capacity. Here, we report the experimental realization of 2D hydrogen boride sheets with an empirical formula of H1B1, produced by exfoliation and complete ion-exchange between protons and magnesium cations in magnesium diboride (MgB2) with an average yield of 42...
September 19, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28925951/transparent-pullulan-mica-nanocomposite-coatings-with-outstanding-oxygen-barrier-properties
#15
Ilke Uysal Unalan, Derya Boyacı, Silvia Trabattoni, Silvia Tavazzi, Stefano Farris
This study presents a new bionanocomposite coating on poly(ethylene terephthalate) (PET) made of pullulan and synthetic mica. Mica nanolayers have a very high aspect ratio (α), at levels much greater than that of conventional exfoliated clay layers (e.g., montmorillonite). A very small amount of mica (0.02 wt %, which is ϕ ≈ 0.00008) in pullulan coatings dramatically improved the oxygen barrier performance of the nanocomposite films under dry conditions, however, this performance was partly lost as the environmental relative humidity (RH) increased...
September 19, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28925710/highly-localized-strain-in-a-mos2-au-heterostructure-revealed-by-tip-enhanced-raman-spectroscopy
#16
Mahfujur Rahaman, Raul D Rodriguez, Gerd Plechinger, Stefan Moras, Christian Schüller, Tobias Korn, Dietrich R T Zahn
Tip-enhanced Raman spectroscopy (TERS) has been rapidly improved over the last decade and opened up opportunities to study phonon properties of materials at the nanometer scale. In this contribution we report on tip-enhanced Raman spectroscopy (TERS) of an ultra-thin MoS2 flake on a nanostructured Au on silicon surface forming a two-dimensional (2D) crystal/plasmonic heterostructure. Au nanostructures (shaped in triangles) are prepared by nanosphere lithography and then MoS2 is mechanically exfoliated on top of them...
September 19, 2017: Nano Letters
https://www.readbyqxmd.com/read/28923333/buccal-cell-micronucleus-frequency-is-significantly-elevated-in-patients-with-spinocerebellar-ataxia-type-2
#17
Dany A Cuello-Almarales, Luis E Almaguer-Mederos, Yaimé Vázquez-Mojena, Dennis Almaguer-Gotay, Pedro Zayas-Feria, José M Laffita-Mesa, Yanetza González-Zaldívar, Raúl Aguilera-Rodríguez, Annelié Rodríguez-Estupiñán, Luis Velázquez-Pérez
Spinocerebellar ataxia type 2 (SCA2) is part of a group of at least nine dominantly inherited disorders characterized by progressive degeneration of specific neuronal populations and a shared mutational mechanism involving the expansion of a CAG repeat tract in coding regions of novel genes. Efforts have been made to identify biomarkers of disease progression, which would allow timely preventive therapeutic interventions. In the present study was assessed the influence of several genome instability biomarkers on SCA2 clinical severity...
April 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/28922479/highly-conductive-and-transparent-large-area-bilayer-graphene-realized-by-mocl5-intercalation
#18
Hiroki Kinoshita, Il Jeon, Mina Maruyama, Kenji Kawahara, Yuri Terao, Dong Ding, Rika Matsumoto, Yutaka Matsuo, Susumu Okada, Hiroki Ago
Bilayer graphene (BLG) comprises a 2D nanospace sandwiched by two parallel graphene sheets that can be used to intercalate molecules or ions for attaining novel functionalities. However, intercalation is mostly demonstrated with small, exfoliated graphene flakes. This study demonstrates intercalation of molybdenum chloride (MoCl5 ) into a large-area, uniform BLG sheet, which is grown by chemical vapor deposition (CVD). This study reveals that the degree of MoCl5 intercalation strongly depends on the stacking order of the graphene; twist-stacked graphene shows a much higher degree of intercalation than AB-stacked...
September 18, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28921659/ligature-induced-peri-implantitis-and-periodontitis-in-mice
#19
Sarah Hiyari, Ryan Wong, Aline Yaghsezian, Azadi Naghibi, Sotirios Tetradis, Paulo M Camargo, Flavia Q Pirih
AIM: Peri-implantitis (PI), inflammation around dental implants, shares characteristics with periodontitis (PD). However, PI is more difficult to control, treat, and detailed pathophysiology is unclear. We aimed to compare PI and PD progression utilizing a murine model. MATERIALS AND METHODS: Four-week-old male C57BL/6J mice had their left maxillary molars extracted. Implants were placed in healed extraction sockets and osseointegrated. Ligatures were tied around the implant and second molar...
September 16, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28920109/papillon-lef%C3%A3-vre-syndrome-a-series-of-three-cases-in-the-same-family-and-a-literature-review
#20
Jasbir D Upadhyaya, Dustin Pfundheller, Mohammed N Islam, Indraneel Bhattacharyya
Papillon-Lefèvre syndrome (PLS) is a rare autosomal recessive disorder that exhibits palmoplantar keratosis and early severe periodontitis. The oral disease affects both the primary and permanent dentitions leading to premature exfoliation of teeth. Various etiologic factors, such as genetic mutations, immunologic alterations, and bacteria have been implicated in PLS. Genetic mutations leading to the loss of function of cathepsin C (CTSC) gene, located on chromosome 11q14, is considered pivotal in this condition...
2017: Quintessence International
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