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https://www.readbyqxmd.com/read/28208085/accurate-determination-of-lattice-parameters-based-on-niggli-reduced-cell-theory-by-using-digitized-electron-diffraction-micrograph
#1
Yi Yang, Canying Cai, Jianguo Lin, Lunjun Gong, Qibin Yang
In this paper, we used Niggli reduced cell theory to determine lattice constants of a micro/nano crystal by using electron diffraction patterns. The Niggli reduced cell method enhanced the accuracy of lattice constant measurement obviously, because the lengths and the angles of lattice vectors of a primitive cell can be measured directly on the electron micrographs instead of a double tilt holder. With the aid of digitized algorithm and least square optimization by using three digitized micrographs, a valid reciprocal Niggli reduced cell number can be obtained...
January 31, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28207846/analysis-of-the-causes-of-recurrence-after-frontalis-suspension-using-silicone-rods-for-congenital-ptosis
#2
Chang Yeom Kim, Byeong Jae Son, Jangyup Son, Jongill Hong, Sang Yeul Lee
BACKGROUND: Silicone rod is a commonly used synthetic suspension material in frontalis suspension surgery to correct blepharoptosis. The most challenging problem and a decisive drawback of the use of silicone rod is a considerable rate of ptosis recurrence after surgery. We examined patients with recurred ptosis and assessed the physical and micromorphological properties of implanted silicone rods to determine the causative mechanisms of recurred ptosis after frontalis suspension using silicone rod...
2017: PloS One
https://www.readbyqxmd.com/read/28195845/an-analysis-of-laser-therapy-for-the-treatment-of-nonmelanoma-skin-cancer
#3
Teo Soleymani, Michael Abrouk, Kristen M Kelly
BACKGROUND: Skin cancer remains the most prevalent type of cancer in the United States, and its burden on the health care system remains substantial. Standard treatments such as cryosurgery, electrodessication and curettage, topical and photodynamic therapies, and surgical excision including Mohs micrographic surgery are not without inherent morbidity, including risk of bleeding, infection, and scar. OBJECTIVE: Lasers may be an alternative for treatment of nonmelanoma skin cancer, and this paper reviews this therapeutic option...
February 9, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28193466/three-dimensional-ionic-liquid-functionalized-magnetic-graphene-oxide-nanocomposite-for-the-magnetic-dispersive-solid-phase-extraction-of-16-polycyclic-aromatic-hydrocarbons-in-vegetable-oils
#4
Yun Zhang, Hua Zhou, Zhe-Hua Zhang, Xiang-Lun Wu, Wei-Guo Chen, Yan Zhu, Chun-Fu Fang, Yong-Gang Zhao
In this paper, a novel three-dimensional ionic liquid functionalized magnetic graphene oxide nanocomposite (3D-IL@mGO) was prepared, and used as an effective adsorbent for the magnetic dispersive solid phase extraction (MSPE) of 16 polycyclic aromatic hydrocarbons (PAHs) in vegetable oil prior to gas chromatography-mass spectrometry (GC-MS). The properties of 3D-IL@mGO were characterized by scanning electron micrographs (SEM), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM). The 3D-IL@mGO, functionalized by ionic liquid, exhibited high adsorption toward PAHs...
February 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28192354/biosorptive-removal-of-malachite-green-from-aqueous-solution-using-chemically-modified-brown-marine-alga-sargassum-swartzii
#5
M Jerold, V Sivasubramanian
Sargassum swartzii, marine macro brown alga, showed a high malachite green (MG) biosorption capacity in batch mode of operation. The analytical evidence from Fourier transform infrared spectra confirmed the involvement of amine group in the biosorption of MG and electrostatic interaction type of mechanism was proposed to occur between the amine group of dye and the cationic MG dye solution. Scanning electron micrograph shows the morphological features and the attachment of dye onto the biosorbent. pH edge experiment shows that biosorption capacity was maximum at pH 10...
February 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28189109/superior-selectivity-and-enhanced-response-characteristics-of-palladium-sensitized-vanadium-pentoxide-nanorods-for-detection-of-nitrogen-dioxide-gas
#6
A A Mane, M P Suryawanshi, J H Kim, A V Moholkar
Vanadium pentoxide (V2O5) nanorods have been deposited onto the glass substrates by spraying 75ml of 30mM vanadium trichloride (VCl3) solution at optimized substrate temperature of 400°C. The XRD study confirms the formation of orthorhombic crystal structure of V2O5 nanorods. The FE-SEM micrograph shows the nanorods-like morphology of V2O5. The presence of palladium (Pd) in the Pd-sensitized V2O5 nanorods is confirmed using EDAX study. The gas sensing measurements show that the Pd-sensitized V2O5 sensing material is an outstanding candidate for nitrogen dioxide (NO2) gas detection...
February 3, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28186394/mechanisms-of-ph-sensitivity-and-cellular-internalization-of-peoz-b-pla-micelles-with-varied-hydrophilic-hydrophobic-ratios-and-intracellular-trafficking-routes-and-fate-of-the-copolymer
#7
Dishi Wang, Yanxia Zhou, Xinru Li, Xiaoyou Qu, Yunqiang Deng, Ziqi Wang, Chuyu He, Yang Zou, Yiguang Jin, Yan Liu
pH-responsive polymeric micelles have shown promise for the targeted and intracellular delivery of antitumor agents. The present study aimed to elucidate the possible mechanisms of pH-sensitivity and cellular internalization of PEOz-b-PLA micelles in detail, further unravel the effect of hydrophilic/hydrophobic ratio of the micelles on their cellular internalization, and examine the intracellular trafficking routes and fate of PEOz-b-PLA after internalization of the micelles. The results of variations in the size and Zeta potential of PEOz-b-PLA micelles and cross-sectional area of PEOz-b-PLA molecules with pH values suggested that electrostatic repulsion between PEOz chains resulting from ionization of the tertiary amide groups along PEOz chain at lower pH than its pKa was responsible for pH-sensitivity of PEOz-b-PLA micelles...
February 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28183116/on-the-identity-of-the-palearctic-species-of-the-wolf-spider-genus-i-trebacosa-i-araneae-lycosidae
#8
Tamás Szűts, Béla Zalai, Olivier Villepoux, Sascha Buchholz, János Eichardt, Evgeni Zhukovets, Pierre Oger, Csaba Szinetár
In this paper we propose Trebacosa brunhesi Villepoux, 2007 as a junior synonym of Trebacosa europaea Szinetár & Kan-csal, 2007 based on the examination of specimens from all the localities from where those species are known. Illustration of the type species of the genus, Trebacosa marxi (Stone, 1890) and specimens from all known localities of T. europaea are given to show both the inter- and the intraspecific differences of the genus. Scanning electron micrographs were used to illustrate the detailed structure of the female's genitalia...
January 9, 2017: Zootaxa
https://www.readbyqxmd.com/read/28181233/sebaceous-carcinoma-in-solid-organ-transplant-recipients
#9
Elika Hoss, Steven A Nelson, Amit Sharma
BACKGROUND: Though a rare tumor, sebaceous carcinoma is relatively well-described in immunocompetent patients, in whom it often occurs in a periorbital distribution where it has an overall poor prognosis with a high metastasis rate. The effect of transplant-related immunosuppression on the development of sebaceous carcinoma and its outcomes has not been characterized. METHODS: We collected 9 cases from a single institution of patients developing sebaceous carcinoma after solid organ transplantation...
February 8, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/28178008/processing-adipose-rich-mohs-samples-a-comparative-study-of-effectiveness-of-pretreatment-with-liquid-nitrogen-versus-flash-freezing-spray
#10
Jeave Reserva, Zachary Kozel, Cindy Krol, Jodi Speiser, William Adams, Rebecca Tung
Processing of adipose-rich Mohs micrographic surgery (MMS) specimens poses challenges that may preclude complete margin evaluation. In this setting, the value of additional freezing methods using various cooling agents has not been previously investigated. The aim of this study is to compare the frozen section quality of high-adipose Mohs specimens processed without additional cooling treatments versus those pretreated with 1,1,1,2-tetrafluoroethane (TFE) or liquid nitrogen (LN2). A set of 3 sections were each taken from 24 adipose-rich Mohs micrographic surgery specimens...
January 26, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28178005/surgical-treatment-and-outcomes-of-patients-with-extramammary-paget-disease-a-cohort-study
#11
Sharon J Kim, Agnieszka K Thompson, Adeel S Zubair, Clark C Otley, Christopher J Arpey, Christian L Baum, Randall K Roenigk, Christine M Lohse, Jerry D Brewer
BACKGROUND: Extramammary Paget disease (EMPD) is a rare intraepithelial adenocarcinoma occurring mainly in the anogenital region. Traditional management with wide local excision has shown high recurrence rates, thus Mohs micrographic surgery (MMS) has emerged as a promising treatment option. OBJECTIVE: To compare long-term outcomes after treatment with MMS or excision for primary EMPD. METHODS AND MATERIALS: Retrospective cohort review was conducted for 207 patients with EMPD treated at Mayo Clinic in Rochester, MN, between 1961 and 2012...
February 6, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28177982/pharmacological-activation-of-protein-kinase-a-improves-memory-loss-and-neuropathological-changes-in-a-mouse-model-of-dementia-of-alzheimer-s-type
#12
Amit Kumar, Nirmal Singh
The study investigates the therapeutic potential of the protein kinase A (PKA) activator forskolin in cognitive deficits of mice. Streptozotocin (STZ) [3 mg/kg, intracerebroventricularly (i.c.v.)] was used to induce memory deficits in mice, whereas aged mice served as natural model of dementia. Forskolin (2.5, 5, and 10 mg/kg/day, oral) treatment was administered to i.c.v. STZ-treated and aged mice for 14 days. The Morris Water Maze test was used to evaluate learning and memory. Estimation of brain acetylcholinesterase (AChE) activity, brain glutathione, thiobarbituric acid-reactive species, brain myeloperoxidase levels, and histopathological studies were also performed...
February 7, 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/28177321/the-crystal-structure-of-pd1-a-haemophilus-surface-fibril-domain
#13
Jack Wright, Maren Thomsen, Robert Kolodziejczyk, Joshua Ridley, Jessica Sinclair, Glenn Carrington, Birendra Singh, Kristian Riesbeck, Adrian Goldman
The Haemophilus surface fibril (Hsf) is an unusually large trimeric autotransporter adhesin (TAA) expressed by the most virulent strains of H. influenzae. Hsf is known to mediate adhesion between pathogen and host, allowing the establishment of potentially deadly diseases such as epiglottitis, meningitis and pneumonia. While recent research has suggested that this TAA might adopt a novel `hairpin-like' architecture, the characterization of Hsf has been limited to in silico modelling and electron micrographs, with no high-resolution structural data available...
February 1, 2017: Acta Crystallographica. Section F, Structural Biology Communications
https://www.readbyqxmd.com/read/28171812/immiscible-poly-lactic-acid-poly-%C3%AE%C2%B5-caprolactone-for-temporary-implants-compatibility-and-cytotoxicity
#14
Pablo F M Finotti, Lidiane C Costa, Ticiana S O Capote, Raquel M Scarel-Caminaga, Marcelo A Chinelatto
This manuscript focuses on the effect of the addition of a low molecular weight triblock copolymer derived from ε-caprolactone and tetrahydrofuran (CT) on the compatibility and cytotoxicity of immiscible poly(lactic acid) (PLA) and poly(ε-caprolactone) (PCL) blends. Binary and tertiary PLA/PCL blends were prepared by melt mixing in a twin-screw extruder and their morphological, mechanical and thermal behaviors were investigated by scanning electron microscopy (SEM), tensile and Izod impact test, dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC)...
January 31, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28169109/evaluation-of-the-infection-process-by-lecanicillium-fungicola-in-agaricus-bisporus-by-scanning-electron-microscopy
#15
Janaira Santana Nunes, Manuela Rocha de Brito, Diego Cunha Zied, Eloisa Aparecida das Graças Leite, Eustáquio Souza Dias, Eduardo Alves
BACKGROUND: Lecanicillium fungicola causes dry bubble disease in Agaricus bisporus mushrooms leading to significant economic losses in commercial production. AIMS: To monitor the infection process of L. fungicola in Brazilian strains of A. bisporus. METHODS: The interaction between the mycelium of L. fungicola (LF.1) and three strains of A. bisporus (ABI 7, ABI 11/14 and ABI 11/21) was studied. Electron microscopy and X-ray microanalyses of vegetative growth and basidiocarp infection were evaluated...
February 3, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28168720/external-morphogenesis-of-the-tardigrade-hypsibius-dujardini-as-revealed-by-scanning-electron-microscopy
#16
Vladimir Gross, Irene Minich, Georg Mayer
Tardigrada, commonly called water bears, is a taxon of microscopic panarthropods with five-segmented bodies and four pairs of walking legs. Although tardigrades have been known to science for several centuries, questions remain regarding many aspects of their biology, such as embryogenesis. Herein, we used scanning electron microscopy to document the external changes that occur during embryonic development in the tardigrade Hypsibius dujardini (Eutardigrada, Parachela, Hypsibiidae). Our results show an accelerated development of external features, with approximately 30 hrs separating the point at which external structures first become recognizable and a fully formed embryo...
February 6, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28165350/sebaceous-carcinoma-treated-with-mohs-micrographic-surgery
#17
Kimberly L Brady, Eva A Hurst
BACKGROUND: Sebaceous carcinoma is a rare and potentially aggressive adnexal neoplasm with historic data indicating high rates of recurrence, metastasis, and cancer-specific mortality. OBJECTIVE: To evaluate the incidence of local recurrence, metastasis, disease-specific mortality, and all-cause mortality and to identify work-up approaches. PATIENTS AND METHODS/MATERIALS: Retrospective review of patients with sebaceous carcinoma treated with Mohs micrographic surgery between 2001 and 2013 at one institution...
February 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28152479/inhibitor-of-phosphodiestearse-4-improves-memory-deficits-oxidative-stress-neuroinflammation-and-neuropathological-alterations-in-mouse-models-of-dementia-of-alzheimer-s-type
#18
Amit Kumar, Nirmal Singh
The study investigates the potential of Rolipram a phosphodiesterase-4 inhibitor in cognitive deficits induced by streptozotocin (STZ, 3mg/kg intracerebroventricularly) and natural ageing in mice. Morris water maze (MWM) test was employed to evaluate learning and memory of the animals. Extent of oxidative stress was measured by estimating the levels of brain glutathione (GSH) and thiobarbituric acid reactive species (TBARS). Brain acetylcholinestrase (AChE) activity was also estimated. The brain activity of myeloperoxidase (MPO) was measured as a marker of inflammation...
January 30, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28152262/structural-analysis-of-fluorine-containing-bioactive-glass-nanoparticles-synthesized-by-sol-gel-route-assisted-by-ultrasound-energy
#19
Carolina E C Lins, Agda A R Oliveira, Ismael Gonzalez, Waldemar A A Macedo, Marivalda M Pereira
In the last decades, studies about the specific effects of bioactive glass on remineralization of dentin were the focus of attention, due to their excellent regenerative properties in mineralized tissues. The incorporation of Fluorine in bioactive glass nanoparticles may result in the formation of fluorapatite (FAP), which is chemically more stable than hydroxyapatite or carbonated hydroxyapatite, and therefore is of interest for dental applications. The aim of this study was to synthesize and characterize a new system of Fluorine-containing bioactive glass nanoparticles (BGNPF)...
February 2, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28150693/phcesa3-silencing-inhibits-elongation-and-stimulates-radial-expansion-in-petunia
#20
Weiyuan Yang, Yuanping Cai, Li Hu, Qian Wei, Guoju Chen, Mei Bai, Hong Wu, Juanxu Liu, Yixun Yu
Cellulose synthase catalytic subunits (CESAs) play important roles in plant growth, development and disease resistance. Previous studies have shown an essential role of Arabidopsis thaliana CESA3 in plant growth. However, little is known about the role of CESA3 in species other than A. thaliana. To gain a better understanding of CESA3, the petunia (Petunia hybrida) PhCESA3 gene was isolated, and the role of PhCESA3 in plant growth was analyzed in a wide range of plants. PhCESA3 mRNA was present at varying levels in tissues examined...
February 2, 2017: Scientific Reports
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