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https://www.readbyqxmd.com/read/29786842/correlated-time-variation-of-bulk-microstructure-and-rheology-in-asphalt-binders
#1
A Ramm, N Sakib, A Bhasin, M C Downer
We use near-infrared dark-field optical microscopy to probe isothermal time variation of the volume fraction of naturally-occurring, subsurface microstructures in PG 64-22 asphalt binders at temperature T=30∘C, following a rapid heating (cooling) increment |ΔT|=20∘C from initial temperature T0=10∘C(50∘C). We compare these microstructure variations with isothermal time variations of the magnitude |G30∗(t)| of the bulk complex shear modulus measured for identical sample conditions with a Dynamic Shear Rheometer...
May 22, 2018: Journal of Microscopy
https://www.readbyqxmd.com/read/29786830/blue-light-filtering-intraocular-lenses-iols-for-protecting-macular-health
#2
REVIEW
Laura E Downie, Ljoudmila Busija, Peter R Keller
BACKGROUND: An intraocular lens (IOL) is a synthetic lens that is surgically implanted within the eye following removal of the crystalline lens, during cataract surgery. While all modern IOLs attenuate the transmission of ultra-violet (UV) light, some IOLs, called blue-blocking or blue-light filtering IOLs, also reduce short-wavelength visible light transmission. The rationale for blue-light filtering IOLs derives primarily from cell culture and animal studies, which suggest that short-wavelength visible light can induce retinal photoxicity...
May 22, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29786788/transplantable-animal-studies-and-whole-body-optical-imaging-in-prostate-carcinoma
#3
Geertje van der Horst, Maaike van der Mark, Henry Cheung, Gabri van der Pluijm
Current treatments of advanced prostate cancer only marginally increase overall survival and can be regarded as predominantly palliative. Hence, there is an urgent need for novel therapeutic strategies for the treatment of primary tumors and, more importantly perhaps, for the prevention of tumor progression and metastasis formation. Clinically relevant preclinical models are therefore urgently needed. An ideal, clinically relevant preclinical model would mimic the genetic and phenotypic changes that occur at the different stages of human prostate cancer progression and subsequent metastasis...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29786742/a-novel-alendronate-functionalized-nanoprobe-for-simple-colorimetric-detection-of-cancer-associated-hypercalcemia
#4
Abhishek Sahu, Youngmin Hwang, Cristian Vilos, Jong-Min Lim, Sunghyun Kim, Won Il Choi, Giyoong Tae
The calcium (Ca2+) ion concentration in the blood serum is tightly regulated, and any abnormalities in the level of serum calcium ions are associated with many potentially dangerous diseases. Thus, monitoring of the Ca2+ ion concentration in the blood serum is of fundamental importance. Gold nanoparticle (GNP)-based colorimetric biosensors have enormous potential in clinical diagnostic applications due to their simplicity, versatility, and unique optical properties. In this study, we have developed an alendronate functionalized gold nanoparticle (GNP-ALD) system for the measurement of Ca2+ ion concentration in biological samples...
May 22, 2018: Nanoscale
https://www.readbyqxmd.com/read/29786732/unusually-low-thermal-conductivity-of-atomically-thin-2d-tellurium
#5
Zhibin Gao, Fang Tao, Jie Ren
Tellurium is a high-performance thermoelectric material due to its superior electronic transport and low lattice thermal conductivity (κL). Here, we report the ultralow κL in the monolayer tellurium, i.e., tellurene, which has been successfully synthesized in recent experiments. We find that tellurene has a compellingly low room temperature κL of 2.16 and 4.08 W m-1 K-1 along the armchair and zigzag directions, respectively, which is lower than any reported values for other 2D materials. We attribute this unusually low κL to the soft acoustic modes, the extremely low-energy optical modes and the strong scattering among optical-acoustic phonons, which place tellurene as a potential novel thermoelectric material...
May 22, 2018: Nanoscale
https://www.readbyqxmd.com/read/29786723/a-highly-sensitive-and-fast-graphene-nanoribbon-cspbbr-3-quantum-dot-phototransistor-with-enhanced-vertical-metal-oxide-heterostructures
#6
Xiang Liu, Wenjian Kuang, Haibing Ni, Zhi Tao, Qianqian Huang, Jing Chen, Qingquan Liu, Jianhua Chang, Wei Lei
Although recent breakthroughs in reported graphene-based phototransistors with embedded quantum dots (QDs) have definitely been astonishing, there are still some obstacles in their practical use with regard to their electrical and optical performances. We show that through optimization of the vertical graphene nanoribbon (GNR)/QD/IGZO heterostructure and the ultrahigh efficiency of CsPbBr3 QDs, it is possible to significantly increase the on/off ratio (>103), the subthreshold slope (S.S., 0.9 V dec-1), the device's field effect mobility (μFET, 13 cm-1 V-1 S-1) and other electrical properties...
May 22, 2018: Nanoscale
https://www.readbyqxmd.com/read/29786720/a-strain-induced-subwavelength-structure-for-a-haze-free-and-highly-transparent-flexible-plastic-substrate
#7
Jae Yong Park, Juyoung Ham, Illhwan Lee, Jong-Lam Lee
This paper presents a method to produce subwavelength-scale (<250 nm) AgCl nanostructures on a flexible plastic film, which is indispensable for highly efficient flexible displays. Using Cl2 plasma treatment on an Ag-coated plastic film, AgCl nanostructures were produced through the reaction of Ag atoms with Cl radicals. During the reaction, the volume of AgCl expands, leading to drastically changed surface morphology from a two-dimensional (2D) flat Ag surface to a 3D subwavelength-scale AgCl nanostructure...
May 22, 2018: Nanoscale
https://www.readbyqxmd.com/read/29786692/corrigendum-configurational-molecular-glue-one-optically-active-polymer-attracts-two-oppositely-configured-optically-active-polymers
#8
Hideto Tsuji, Soma Noda, Takayuki Kimura, Tadashi Sobue, Yuki Arakawa
This corrects the article DOI: 10.1038/srep45170.
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29786650/a-review-of-tunable-wavelength-selectivity-of-metamaterials-in-near-field-and-far-field-radiative-thermal-transport
#9
Yanpei Tian, Alok Ghanekar, Matt Ricci, Mikhail Hyde, Otto Gregory, Yi Zheng
Radiative thermal transport of metamaterials has begun to play a significant role in thermal science and has great engineering applications. When the key features of structures become comparable to the thermal wavelength at a particular temperature, a narrowband or wideband of wavelengths can be created or shifted in both the emission and reflection spectrum of nanoscale metamaterials. Due to the near-field effect, the phenomena of radiative wavelength selectivity become significant. These effects show strong promise for applications in thermophotovoltaic energy harvesting, nanoscale biosensing, and increased energy efficiency through radiative cooling in the near future...
May 22, 2018: Materials
https://www.readbyqxmd.com/read/29786443/an-experimental-study-of-the-structural-effect-on-the-nanosecond-nonlinear-optical-response-of-o-doped-polycyclic-aromatic-hydrocarbons-pahs
#10
Ioannis Papadakis, Zoi Bouza, Aristeidis Stathis, Ioannis Orfanos, Stelios Couris, Tanja Miletić, Davide Bonifazi
The nonlinear optical response of some O-doped PAHs is systematically investigated in the present work aiming to understand the influence of structural effects on their nonlinear optical response. In that view, the third-order nonlinear optical properties of these PAHs were measured under 4 ns, visible (532 nm) and infrared (1064 nm) laser excitation. The O-doped PAHs were found exhibiting large saturable absorption and negative sign nonlinear refraction under visible excitation, both increasing with the addition of naphtalene units and with the number of O-atoms...
May 22, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29786426/influence-of-enzyme-quantity-and-distribution-on-the-self-propulsion-of-non-janus-urease-powered-micromotors
#11
Tania Patiño, Natalia Feiner-Gracia, Xavier Arque, Albert Miguel-López, Anita Jannasch, Tom Stumpp, Erik Schäffer, Lorenzo Albertazzi, Samuel Sanchez
The use of enzyme catalysis to power micro and nanomachines offers unique features such as biocompatibility, versatili-ty and fuel bioavailability. Yet, the key parameters underlying the motion behavior of enzyme-powered motors are not completely understood. Here, we investigate the role of enzyme distribution and quantity on the generation of active mo-tion. Two different micromotor architectures based on either polystyrene (PS) or polystyrene coated with a rough silicon dioxide shell (PS@SiO2) were explored...
May 22, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29786093/author-correction-high-speed-volumetric-imaging-of-neuronal-activity-in-freely-moving-rodents
#12
Oliver Skocek, Tobias Nöbauer, Lukas Weilguny, Francisca Martínez Traub, Chuying Naomi Xia, Maxim I Molodtsov, Abhinav Grama, Masahito Yamagata, Daniel Aharoni, David D Cox, Peyman Golshani, Alipasha Vaziri
In the version of this Brief Communication originally published online, ref. 21 included details for a conference paper (Pegard, N. C. et al. Paper presented at Novel Techniques in Microscopy: Optics in the Life Sciences, Vancouver, BC, Canada, 12-15 April 2015). The correct reference is the following: Pégard, N. C. et al. Optica 3, 517-524 (2016). This error has been corrected in the print, HTML and PDF versions of the paper.
May 21, 2018: Nature Methods
https://www.readbyqxmd.com/read/29786012/navigation-guided-optic-canal-decompression-for-traumatic-optic-neuropathy-two-case-reports
#13
Kasturi Bhattacharjee, Samir Serasiya, Deepika Kapoor, Harsha Bhattacharjee
Two cases of traumatic optic neuropathy presented with profound loss of vision. Both cases received a course of intravenous corticosteroids elsewhere but did not improve. They underwent Navigation guided optic canal decompression via external transcaruncular approach, following which both cases showed visual improvement. Postoperative Visual Evoked Potential and optical coherence technology of Retinal nerve fibre layer showed improvement. These case reports emphasize on the role of stereotactic navigation technology for optic canal decompression in cases of traumatic optic neuropathy...
June 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29786010/commentary-comparison-of-optical-coherence-tomography-angiography-and-fundus-fluorescein-angiography-features-of-retinal-capillary-hemangioblastoma
#14
Vikas Khetan, Mukesh Jain
No abstract text is available yet for this article.
June 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29786009/comparison-of-optical-coherence-tomography-angiography-and-fundus-fluorescein-angiography-features-of-retinal-capillary-hemangioblastoma
#15
Pradeep Sagar, R Rajesh, Mahesh Shanmugam, Vinaya Kumar Konana, Divyansh Mishra
The aim of this study is to compare the optical coherence tomography angiography (OCTA) and fundus fluorescein angiography (FFA) features of retinal capillary hemangioblastoma (RCH). This is an observational case series of three patients with von Hippel-Lindau (VHL) disease and one patient with juxtapapillary RCH. All patients underwent FFA with a mydriatic fundus camera and OCTA with swept-source angio OCT. The FFA and OCTA characteristics of tumors were compared. In our series, FFA could identify tumors as small as the width of a third-order retinal artery, which was missed on clinical examination...
June 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29786004/anterior-segment-optical-coherence-tomography-of-intraocular-lens-opacification
#16
Saurabh Choudhry, Neha Goel, Aanchal Mehta, Nidhi Mahajan
Postoperative opacification of a hydrophilic acrylic intraocular lens (IOL) is an uncommon complication. A 57-year-old diabetic female who had undergone phacoemulsification with IOL implantation in her right eye 16 years back presented with diminution of vision in the same eye for 3 years. Significant IOL opacification was observed clinically and anterior segment optical coherence tomography clearly delineated the intraoptic deposits, sparing the haptics, and edges of the optic. IOL explant and exchange was performed leading to restoration of visual acuity to 6/9...
June 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29785999/swept-source-optical-coherence-tomography-angiography-of-an-infarct-of-a-small-intra-neural-branch-of-central-retinal-artery-simulating-cilio-retinal-artery
#17
Rohan Chawla, Shorya Vardhan Azad, Brijesh Takkar, Anu Sharma
No abstract text is available yet for this article.
June 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29785994/the-efficacy-of-intravitreal-dexamethasone-implant-as-the-first-line-treatment-for-retinal-vein-occlusion-related-macular-edema-in-a-real-life-scenario
#18
Mert Simsek, Mehmet Citirik, Serdar Ozates, Dilara Ozkoyuncu
Purpose: This study evaluated the effect of intravitreal dexamethasone implant (IDI; Ozurdex) injection for treating macular edema in patients with branch retinal vein occlusion (BRVO) or central retinal vein occlusion (CRVO). Methods: This prospective study included 40 eyes of 40 patients with nonischemic BRVO and 31 eyes of 31 patients with nonischemic CRVO who received IDI injection as the first-line treatment for macular edema. The best-corrected visual acuity (BCVA) value before and after the treatment; intraocular pressure; optic coherence tomography findings; and all ocular examination findings, including central foveal thickness (CFT) measurement and fluorescein angiography findings, were evaluated for each patient...
June 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29785993/factors-predicting-response-of-pseudophakic-cystoid-macular-edema-to-topical-steroids-and-nepafenac
#19
Sabyasachi Sengupta, Dhaivat Vasavada, Utsab Pan, Manavi Sindal
Purpose: The purpose of this study is to determine factors predicting resolution of acute pseudophakic cystoid macular edema (PCME) after 6 weeks of topical prednisolone and nepafenac application. Methods: Case records of patients with a clinical and optical coherence tomography (OCT)-based diagnosis of acute PCME were retrospectively reviewed for best-corrected visual acuity and OCT-based parameters at the time of presentation with PCME. In addition, demographic variables, intraoperative and early postoperative factors, and type of treatment prescribed (tapering vs...
June 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29785990/continuous-intraoperative-optical-coherence-tomography-guided-shield-ulcer-debridement-with-tuck-in-multilayered-amniotic-membrane-transplantation
#20
Namrata Sharma, Deepali Singhal, Prafulla Kumar Maharana, Rahul Jain, Pranita Sahay, Jeewan S Titiyal
Purpose: The aim of this study is to describe a modified surgical technique of continuous intraoperative optical coherence tomography (iOCT)-guided shield ulcer debridement with tuck-in multilayered Amniotic membrane transplantation (ML AMT) in vernal keratoconjunctivitis (VKC) with shield ulcer with plaque. Methods: Seven eyes of seven patients presenting with VKC with shield ulcer with plaque were enrolled in this prospective case series and planned for shield ulcer debridement with ML AMT...
June 2018: Indian Journal of Ophthalmology
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