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https://www.readbyqxmd.com/read/29148814/high-yield-production-of-mos2-and-ws2-quantum-sheets-from-their-bulk-materials
#1
Chunchun Han, Yong Zhang, Peng Gao, Shulin Chen, Xinfeng Liu, Yang Mi, Jianqi Zhang, Yanhong Ma, Wenyu Jiang, Jinquan Chang
Mass production of two-dimensional quantum sheets (2D QSs) is highly desired to fully exploit their properties. Herein, we present a general strategy for the high-yield production of molybdenum disulfide (MoS2) and tungsten disulfide (WS2) QSs by a sequential combination of salt-assisted ball-milling and sonication-assisted solvent exfoliation of their bulk materials. Such strategy enables reproducible production of intrinsic and defect-free MoS2 and WS2 QSs with exceedingly high yield of 25.5 wt% and 20.1 wt% respectively...
November 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/29147757/prospective-evaluation-of-co2-laser-assisted-sclerectomy-surgery-class-with-mitomycin-c
#2
Carlo Alberto Cutolo, Alessandro Bagnis, Riccardo Scotto, Chiara Bonzano, Carlo Enrico Traverso
PURPOSE: Our purpose was to evaluate the clinical safety and efficacy of CO2 laser-assisted sclerectomy surgery (CLASS) with Mitomycin C (MMC) in open angle glaucoma (OAG). METHODS: This was a prospective, uncontrolled, interventional case series. All subjects underwent CLASS procedure by a single surgeon. After the dissection of a partial thickness scleral flap, topical MMC 0.2 mg/ml was applied to the sclera and the conjunctiva for 3 min. The CO2 laser with a beam-manipulating system was used to ablate the scleral tissue and expose the Schlemm's canal area...
November 17, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29144756/controlling-graphene-bio-interface-dispersions-in-animal-sera-for-enhanced-stability-and-reduced-toxicity
#3
Ajith Pattammattel, Paritosh Pande, Deepa Kuttappan, Megan Puglia, Ashis K Basu, Mary Amalaradjou, Challa V Kumar
Controlling the graphene-bio interface is important for biological applications of graphene, which is touted as the wonder material of the new century. Graphene samples made in animal sera indicated low toxicity to cells and nematodes, due to the adsorption of the serum proteins on the nascent graphene sheets. The graphite samples were exfoliated in 6 different animal sera, using three different methods, shear reactor, the kitchen blender and by ultrasonication, and maximum efficiency was noted with the kitchen blender...
November 16, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29140387/full-mouth-rehabilitation-with-calvarium-bone-grafts-and-dental-implants-for-a-papillon-lef%C3%A3-vre-syndrome-patient-case-report
#4
Bassam M Kinaia, Kristyn Hope, Ahmed Zuhaili, Jean Francois Tulasne
Papillon-Lefèvre syndrome (PLS) is a rare autosomal recessive disorder of keratinization associated with palmoplantar keratoderma and severe periodontitis resulting in complete edentulism in late adolescence. The pathognomonic dental features of PLS are pathologic migration, hypermobility, and exfoliation of the teeth without any signs of root resorption. It has been suggested that an effective way to treat PLS patients presenting early in the disease progression is extraction of the erupted primary dentition or hopeless permanent teeth followed by antibiotic coverage with periodontal therapy for the remaining teeth...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29139244/raman-exfoliative-cytology-for-oral-precancer-diagnosis
#5
Aditi Sahu, Poonam Gera, Venkatesh Pai, Abhishek Dubey, Gunjan Tyagi, Mandavi Waghmare, Sandeep Pagare, Manoj Mahimkar, C Murali Krishna
Oral premalignant lesions (OPLs) such as leukoplakia, erythroplakia, and oral submucous fibrosis, often precede oral cancer. Screening and management of these premalignant conditions can improve prognosis. Raman spectroscopy has previously demonstrated potential in the diagnosis of oral premalignant conditions (in vivo), detected viral infection, and identified cancer in both oral and cervical exfoliated cells (ex vivo). The potential of Raman exfoliative cytology (REC) in identifying premalignant conditions was investigated...
November 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29137742/ultrasound-coupled-with-supercritical-carbon-dioxide-for-exfoliation-of-graphene-simulation-and-experiment
#6
Yanzhe Gai, Wucong Wang, Ding Xiao, Yaping Zhao
Ultrasound coupled with supercritical CO2 has become an important method for exfoliation of graphene, but behind which a peeling mechanism is unclear. In this work, CFD simulation and experiment were both investigated to elucidate the mechanism and the effects of the process parameters on the exfoliation yield. The experiments and the CFD simulation were conducted under pressure ranging from 8MPa to 16MPa, the ultrasonic power ranging from 12W to 240W and the frequency of 20kHz. The numerical analysis of fluid flow patterns and pressure distributions revealed that the fluid shear stress and the periodical pressure fluctuation generated by ultrasound were primary factors in exfoliating graphene...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29137390/a-cocktail-of-p16-ink4a-and-ki-67-p16-ink4a-and-minichromosome-maintenance-protein-2-as-triage-tests-for-human-papillomavirus-primary-cervical-cancer-screening
#7
Hai-Rui Wang, Yu-Cong Li, Hui-Qin Guo, Lu-Lu Yu, Zeni Wu, Jian Yin, Guang-Dong Liao, Yi-Min Qu, Yu Jiang, Dong Wang, Wen Chen
Most human papillomavirus (HPV) infections are transient and additional triage approaches should be built after HPV-based primary cervical cancer screening. We evaluated the accuracy of p16/Ki-67 and p16/mcm2 dual staining as biomarkers for triaging HPV positive women in China. 4070 participants aged 35 to 64 years attending ongoing cervical cancer screening were enrolled in 2015-2016. Cervical exfoliated cells were collected for HPV DNA analysis and the residual positive specimens were tested for liquid-based cytology and biomarkers...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29136563/generation-of-human-ipsc-line-from-a-patient-with-laterality-defects-and-associated-congenital-heart-anomalies-carrying-a-dand5-missense-alteration
#8
Fernando Cristo, José M Inácio, Graça Rosas, Isabel Marques Carreira, Joana Barbosa Melo, Luís Pereira de Almeida, Patrícia Mendes, Duarte Saraiva Martins, José Maio, Rui Anjos, José A Belo
A human iPSC line was generated from exfoliated renal epithelial (ERE) cells of a patient affected with Congenital Heart Disease (CHD) and Laterality Defects carrying tshe variant p.R152H in the DAND5 gene. The transgene-free iPSCs were generated with the human OSKM transcription factor using the Sendai-virus reprogramming system. The established iPSC line had the specific heterozygous alteration, a stable karyotype, expressed pluripotency markers and generated embryoid bodies that can differentiate towards the three germ layers in vitro...
October 31, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29131430/readily-exfoliated-tise2-nanosheets-for-high-performance-sodium-storage
#9
Wenping Sun, Dan Zhang, Guoqiang Zhao, Peng Li, Yu Zhang, Wenbin Qiu, Jie Shu, Yinzhu Jiang, Shi Xue Dou
Materials with sheet-like morphologies are highly desirable candidates for energy storage and conversion applications due to the confined atomic thickness and high surface area, which would largely improve the electrochemical reaction kinetics. In this work, the sodium storage performance of TiSe2 nanosheets and corresponding sodiation/desodiation reaction mechanism are studied for the first time. TiSe2 nanosheets are readily exfoliated from bulk TiSe2 after quick ultrasonication or grinding. The TiSe2 nanosheets exhibit a reversible capacity of 147 mAh g-1 at 0...
November 13, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29127348/large-area-few-layer-graphene-with-scalable-preparation-from-waste-biomass-for-high-performance-supercapacitor
#10
Taniya Purkait, Guneet Singh, Mandeep Singh, Dinesh Kumar, Ramendra Sundar Dey
Carbonaceous materials with high surface area and a sheet-like structure promote fast ion-transport kinetics, making them an ideal choice to be used in supercapacitors. Few-layer graphene (FLG)-like nanosheets with abundance of micro as well as mesopores are achieved via mechanical exfoliation method from an agricultural waste biomass: peanut shell (PS). A well-known elementary method of probe-sonication, for the achievement of FLG sheets from renewable sources, is introduced in this study for the very first time...
November 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29124900/unsatisfactory-exfoliative-anal-cytology-samples-15-year-experience-with-histologic-cytologic-and-molecular-follow-up
#11
Ruba Khattab, Emily McMeekin, Alan J Taege, James M Hekman, Jennifer A Brainard, Dawn Underwood, Gary W Procop, Charles D Sturgis
BACKGROUND: The incidence of anal carcinoma has risen in recent decades. Exfoliative cytology screening of selected high risk patients is performed in many centers. Unsatisfactory cytology results are frustrating to patients, clinicians, and laboratorians. The aim of this study is to ascertain outcomes of patients with non-diagnostic anal cytology. METHODS: A retrospective review of anal cytology testing performed at the Cleveland Clinic between 01/01/2001 and 12/31/2015 was performed...
November 10, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/29124834/prevalence-and-characterization-of-staphylococcus-aureus-causing-community-acquired-skin-and-soft-tissue-infections-on-java-and-bali-indonesia
#12
Dewi Santosaningsih, Sanarto Santoso, Nanik Setijowati, Harun A Rasyid, Nyoman S Budayanti, Ketut Suata, Dicky B Widhyatmoko, Priyo B Purwono, Kuntaman Kuntaman, Damayanti Damayanti, Cita R S Prakoeswa, Mitchell Laurens, Josephine W I van Nierop, Geraldine L Nanninga, Neline Oudenes, Michelle de Regt, Susan V Snijders, Henri A Verbrugh, Juliëtte A Severin
OBJECTIVES: To define the role of Staphylococcus aureus in community settings among patients with skin and soft tissue infections (SSTI) in Indonesia. METHODS: S. aureus were cultured from anterior nares, throat, and wounds of 567 ambulatory patients presenting with SSTI. The mecA gene and genes encoding Panton-Valentine leukocidin (PVL; lukF-PV and lukS-PV) and exfoliative toxin (ET; eta and etb) were determined by PCR. Clonal relatedness among methicillin-resistant S...
November 10, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/29124395/non-invasive-detection-of-hpv-dna-in-exfoliative-samples-from-ophthalmic-pterygium-a-feasibility-study
#13
Αikaterini K Chalkia, Stavros Derdas, Georgios Bontzos, George Sourvinos, Εfstathios T Detorakis
PURPOSE: The evaluation of a non-invasive detection method for human papilloma virus (HPV) in ophthalmic pterygia. METHODS: Cotton swab samples and corresponding tissue specimens were collected from 21 ophthalmic pterygia of 21 patients. HPV detection and typing were performed by real-time PCR. Discrepancies in HPV detection between swab and tissue samples as well as clinical correlations of findings were examined. RESULTS: HPV DNA was detected in 9 (42...
November 9, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29124272/lithiation-assisted-exfoliation-and-reduction-of-sns2-to-sns-decorated-on-lithium-integrated-graphene-for-efficient-energy-storage
#14
Bing Zhao, Fang Chen, Zhixuan Wang, Shoushuang Huang, Yong Jiang, Zhiwen Chen
Low reversion of lithium sulfide and defects causing irreversible capacity loss are the primary causes of low Coulombic efficiency in tin sulfide/graphene-based composites. Herein, we synthesized a SnS/graphene composite via a novel lithiation-assisted exfoliation and reduction method using SnS2, n-butyllithium, and graphene oxide as raw materials. The experimental results reveal that lithium from the insertion agent combine with the oxygen-containing groups on graphene oxide; this can help in the reduction of hexagonal SnS2 to orthorhombic SnS during calcination and simultaneous pre-occupancy of the edge and defect sites of graphene; thus, additional lithium ion consumption during the initial several lithiation processes is diminished...
November 10, 2017: Nanoscale
https://www.readbyqxmd.com/read/29123206/a-solution-processable-nanostructured-and-conductive-graphene-polyaniline-hybrid-coating-for-metal-corrosion-protection-and-monitoring
#15
Saerona Kim, Thanh-Hai Le, Chul Soon Park, Geunsu Park, Kyung Ho Kim, Semin Kim, Oh Seok Kwon, Gyun Taek Lim, Hyeonseok Yoon
A smart and effective anticorrosive coating consisting of alternating graphene and polyaniline (PANI) layers was developed using top-down solution processing. Graphite was exfoliated using sonication assisted by polyaniline to produce a nanostructured, conductive graphene/polyaniline hybrid (GPn) in large quantities (>0.5 L of 6 wt% solution in a single laboratory-scale process). The GPn was coated on copper and exhibited excellent anticorrosion protection efficiencies of 46.6% and 68.4% under electrochemical polarization in 1 M sulfuric acid and 3...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29119879/magnesium-and-zinc-borate-enhance-osteoblastic-differentiation-of-stem-cells-from-human-exfoliated-deciduous-teeth-in-vitro
#16
Yao-Jen Liu, Wen-Ta Su, Po-Hung Chen
Various biocompatible and biodegradable scaffolds blended with biochemical signal molecules with adequate osteoinductive and osteoconductive properties have attracted significant interest in hard tissue engineering regeneration. We evaluated the distinct effects of magnesium borate, zinc borate, and boric acid blended into chitosan scaffold for osteogenic differentiation of stem cells from exfoliated deciduous teeth. Stem cells from exfoliated deciduous teeth cells are a potential source of functional osteoblasts for applications in bone tissue engineering, but the efficiency of osteoblastic differentiation is low, thereby significantly limiting their clinical applications...
January 1, 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29119163/superhydrophobic-inkjet-printed-flexible-graphene-circuits-via-direct-pulsed-laser-writing
#17
Suprem R Das, Srilok Srinivasan, Loreen R Stromberg, Qing He, Nathaniel Garland, Warren E Straszheim, Pulickel M Ajayan, Ganesh Balasubramanian, Jonathan C Claussen
Solution-phase printing of exfoliated graphene flakes is emerging as a low-cost means to create flexible electronics for numerous applications. The electrical conductivity and electrochemical reactivity of printed graphene has been shown to improve with post-print processing methods such as thermal, photonic, and laser annealing. However, to date no reports have shown the manipulation of surface wettability via post-print processing of printed graphene. Herein, we demonstrate how the energy density of a direct-pulsed laser writing (DPLW) technique can be varied to tune the hydrophobicity and electrical conductivity of the inkjet-printed graphene (IPG)...
November 9, 2017: Nanoscale
https://www.readbyqxmd.com/read/29119159/controlled-multimodal-hierarchically-porous-electrode-self-assembly-of-electrochemically-exfoliated-graphene-for-fully-solid-state-flexible-supercapacitor
#18
Nurlia P Sari, Dipak Dutta, Anif Jamaluddin, Jeng-Kuei Chang, Ching-Yuan Su
Supercapacitors constructed from three-dimensional (3D) graphene electrodes with high ion-accessible surface area and durable mechanical flexibility have great potential for wearable devices. For the development of a highly efficient graphene electrode for electrical double layer capacitors (EDLCs), proper control over not only the specific surface area but also the type of pore (macro-, meso- and micro-porous networks) adapted for an appropriate type of electrolyte is crucial to ensure an ideal performance in terms of both energy density and power delivery rate...
November 9, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29118477/evaluation-of-the-efficacy-of-post-prostatic-massage-urine-cytology-in-diagnosis-of-various-prostatic-lesions-with-cytohistological-and-clinical-correlation
#19
Monisha Choudhury, Savita Agarwal
Background: Elderly men are at high risk of various prostatic diseases carrying high morbidity and mortality rates. For screening large populations, there is a need for a simple, reliable, and noninvasive test with high sensitivity and specificity. Exfoliated prostatic cancer cells can be harvested by prostatic massage and subjected to cytologic examination and molecular tests. Aims: This study was undertaken to evaluate the morphology of various prostatic lesions on post prostatic massage urine cytology and correlate cytologic, histologic, and clinical findings...
October 2017: Journal of Cytology
https://www.readbyqxmd.com/read/29117211/the-treatment-of-femoral-neck-fracture-using-vegf-loaded-nanographene-coated-internal-fixation-screws
#20
Shuo Li, Hengfeng Yuan, Jianfeng Pan, Wenshuai Fan, Liang Zhu, Zuoqin Yan, Changan Guo
PURPOSE: Previous studies have proved that vascular endothelial growth factor (VEGF) has a dual role in the promotion of new bone formation and blood vessel repair during fracture healing. However, how to introduce VEGF to a fracture site safely and effectively is still a challenge. This study aimed to prepare a VEGF-loaded nanographene coated internal fixation screw and to evaluate its effects in the treatment of femoral neck fracture. METHODS: Nanographene coated screws were prepared by direct liquid-phase exfoliation of the graphite method, and the surface characteristics were observed through scanning electron microscopy (SEM)...
2017: PloS One
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