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https://www.readbyqxmd.com/read/28528255/molecular-structure-second-and-third-order-nonlinear-optical-properties-and-dft-studies-of-a-novel-non-centrosymmetric-chalcone-derivative-2e-3-4-fluorophenyl-1-4-1e-4-fluorophenyl-methylene-amino-phenyl-prop-2-en-1-one
#1
Shivaraj R Maidur, Parutagouda Shankaragouda Patil, Anusha Ekbote, Tze Shyang Chia, Ching Kheng Quah
In the present work, the title chalcone, (2E)-3-(4-fluorophenyl)-1-(4-{[(1E)-(4-fluorophenyl) methylene]amino}phenyl)prop-2-en-1-one (abbreviated as FAMFC), was synthesized and structurally characterized by single-crystal X-ray diffraction. The compound is crystallized in the monoclinic system with non-centrosymmetric space group P21 and hence it satisfies the essential condition for materials to exhibit second-order nonlinear optical properties. The molecular structure was further confirmed by using FT-IR and (1)H NMR spectroscopic techniques...
May 9, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28527901/photonic-ring-resonance-is-a-versatile-platform-for-performing-multiplex-immunoassays-in-real-time
#2
Sasi Mudumba, Sophia de Alba, Randy Romero, Carli Cherwien, Alice Wu, Jue Wang, Martin A Gleeson, Muzammil Iqbal, Rufus W Burlingame
Photonic ring resonance is a property of light where in certain circumstances specific wavelengths are trapped in a ring resonator. Sensors based on silicon photonic ring resonators function by detecting the interaction between light circulating inside the sensor and matter deposited on the sensor surface. Binding of biological material results in a localized change in refractive index on the sensor surface, which affects the circulating optical field extending beyond the sensor boundary. That is, the resonant wavelength will change when the refractive index of the medium around the ring resonator changes...
May 17, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28526552/anisometropia-at-age-5-years-after-unilateral-intraocular-lens-implantation-during-infancy-in-the-infant-aphakia-treatment-study-iats
#3
David Weakley, George Cotsonis, M Edward Wilson, David A Plager, Edward G Buckley, Scott R Lambert
PURPOSE: To report the prevalence of anisometropia at age 5 years after unilateral intraocular lens (IOL) implantation in infants. DESIGN: Prospective randomized clinical trial METHODS: Fifty-seven infants in the Infant Aphakia Treatment Study (IATS) with a unilateral cataract were randomized to IOL implantation with an initial targeted postoperative refractive error of either +8D (infants 28 to <48 days of age) or +6D (infants 48-210 days of age). Anisometropia was calculated at age 5 years...
May 16, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28525677/nonlinear-optical-properties-of-sodium-copper-chlorophyllin-in-aqueous-solution
#4
Jiangting Li, Yufeng Peng, Xueyun Han, Shaoshuai Guo, Kunning Liang, Minggao Zhang
BACKGROUND: Sodium copper chlorophyllin (SCC), as one of the derivatives of chlorophyll - with its inherent green features; good stability for heat, light, acids and alkalies; unique antimicrobial capability; and particular deodori zation performance - is widely applied in some fields such as the food industry, medicine and health care, daily cosmetic industry etc. SCC, as one of the metal porphyrins, has attracted much attention because of its unique electronic band structure and photon conversion performance...
May 19, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28523526/iris-fixated-phakic-intraocular-lens-implantation-in-an-adult-with-retinopathy-of-prematurity-1-year-follow-up
#5
Young Shin Kim, Jin Kwon Chung, Sung Jin Lee
PURPOSE: To report a case of iris-fixated phakic intraocular lens (pIOL) implantation in a patient with an extremely steep cornea, shallow anterior chamber, and small corneal diameter caused by retinopathy of prematurity (ROP) and scleral encircling. METHODS: Case report. RESULTS: Iris-fixated pIOLs were implanted in a 19-year-old patient with refraction of -18.5 -0.75 × 180 in the right eye and -15.5 -1.25 × 180 in the left eye. The keratometric values were 53...
May 18, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28523525/etiology-and-outcomes-of-secondary-surgical-intervention-for-dissatisfied-patients-after-pseudophakic-monovision
#6
Sayaka Kato, Misae Ito, Kimiya Shimizu, Kazutaka Kamiya
PURPOSE: To evaluate the etiology and the clinical outcomes of secondary surgical interventions for dissatisfied patients after pseudophakic monovision. SETTING: Department of Ophthalmology, Kitasato University Hospital, Kanagawa, Japan. DESIGN: Retrospective case series. METHODS: This study comprised 12 eyes in 12 patients (age 66.2 ± 5.6 years) who underwent photorefractive keratectomy (PRK) enhancement to improve their dissatisfaction after pseudophakic monovision...
May 18, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28522859/ultrasensitive-terahertz-metamaterial-sensor-based-on-spoof-surface-plasmon
#7
Xu Chen, Wenhui Fan
A planar terahertz metamaterial sensor consisting of a corrugated metal stripe perforated by three rectangular grooves is proposed and investigated numerically. Due to the formation of Fabry-Perot resonance of the spoof surface plasmons mode on the corrugated metal stripe, the extremely sharp resonance in transmission spectrum associated with strong local field enhancement and high quality factor can be realized and exploited for ultrasensitive sensing. Since the intense interaction between electromagnetic waves and analyte materials, the frequency sensitivity of 1...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28520882/ocular-determinants-of-refractive-error-and-its-age-and-sex-related-variations-in-the-chinese-american-eye-study
#8
Grace M Richter, Mingwu Wang, Xuejuan Jiang, Shuang Wu, Dandan Wang, Mina Torres, Farzana Choudhury, Rohit Varma
Importance: Uncorrected refractive error (RE) is a leading cause of visual impairment, and variations in ocular anatomy determine RE. The unique ocular determinants of RE in Chinese American individuals have not been studied previously. Objective: To report ocular determinants of RE in a Chinese American population 50 years and older in Monterey Park, California. Design, Setting, and Participants: The Chinese American Eye Study, a population-based, cross-sectional study, was conducted from February 1, 2010, through October 31, 2013, in Monterey Park, with this particular data analysis performed from January 1 through December 31, 2016...
May 18, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28516955/spectral-correlations-in-a-random-distributed-feedback-fibre-laser
#9
Srikanth Sugavanam, Mariia Sorokina, Dmitry V Churkin
Random distributed feedback fibre lasers belong to the class of random lasers, where the feedback is provided by amplified Rayleigh scattering on sub-micron refractive index inhomogenities randomly distributed over the fibre length. Despite the elastic nature of Rayleigh scattering, the feedback mechanism has been insofar deemed incoherent, which corresponds to the commonly observed smooth generation spectra. Here, using a real-time spectral measurement technique based on a scanning Fabry-Pérot interferometer, we observe long-living narrowband components in the random fibre laser's spectrum...
May 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28516906/nanometric-holograms-based-on-a-topological-insulator-material
#10
Zengji Yue, Gaolei Xue, Juan Liu, Yongtian Wang, Min Gu
Holography has extremely extensive applications in conventional optical instruments spanning optical microscopy and imaging, three-dimensional displays and metrology. To integrate holography with modern low-dimensional electronic devices, holograms need to be thinned to a nanometric scale. However, to keep a pronounced phase shift modulation, the thickness of holograms has been generally limited to the optical wavelength scale, which hinders their integration with ultrathin electronic devices. Here, we break this limit and achieve 60 nm holograms using a topological insulator material...
May 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28515996/dermoscopy-of-alopecia-areata-a-retrospective-analysis
#11
Abhijeet K Jha, Uday K Udayan, P K Roy, Amar K J Amar, R K P Chaudhary
BACKGROUND: Dermoscopy devices can overcome the refractive properties of stratum corneum by interface medium or cross polarization such that the lesion can be easily seen. AIM: To examine the dermoscopic feature in alopecia areata and correlate the severity of disease with dermoscopic features. MATERIALS AND METHODS: Retrospective analysis of 72 patients suffering from alopecia areata (AA), irrespective of age and sex, who visited the dermatology outpatient department of a tertiary care center in Eastern India was carried out...
April 2017: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/28515427/pediatric-vision-screening-using-the-plusoptix-a12c-photoscreener-in-chinese-preschool-children-aged-3-to-4-years
#12
Dan Huang, Xuejuan Chen, Xiaohan Zhang, Yue Wang, Hui Zhu, Hui Ding, Jing Bai, Ji Chen, Zhujun Fu, Zijin Wang, Hu Liu
This study evaluated the performance of plusoptiX A12C in detecting amblyopia risk factors (ARFs) in Chinese children aged 3-to-4-year. PlusoptiX examination was successfully conducted among 1,766 subjects without cycloplegia to detect refractive error, asymmetry and media opacity. Cycloplegic retinoscopy (CR) was conducted on 357 children suspected of having vision abnormalities. Statistical differences between CR and the device were confirmed using the mean spherical value (+1.41 ± 0.87 D versus +1.14 ± 0...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28515423/mir-520b-as-a-novel-molecular-target-for-suppressing-stemness-phenotype-of-head-neck-cancer-by-inhibiting-cd44
#13
Ya-Ching Lu, Ann-Joy Cheng, Li-Yu Lee, Guo-Rung You, Yan-Liang Li, Hsin-Ying Chen, Joseph T Chang
Cancer stem cells preferentially acquire the specific characteristics of stress tolerance and high mobility, allowing them to progress to a therapy-refractive state. To identify a critical molecule to regulate cancer stemness is indispensable to erratically cure cancer. In this study, we identified miR-520b as a novel molecular target to suppress head-neck cancer (HNC) with stemness phenotype. MiR-520b inhibited cellular migration and invasion via the mechanism of epithelial-mesenchymal transition. It also sensitized cells to therapeutic drug and irradiation...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28514829/does-hofstetter-s-equation-predict-the-real-amplitude-of-accommodation-in-children
#14
Hassan Hashemi, Payam Nabovati, Mehdi Khabazkhoob, Abbasali Yekta, Mohammad Hassan Emamian, Akbar Fotouhi
PURPOSE: The aim was to determine the distribution and associated factors of accommodative amplitude (AA) in six- to 12-year-old children and compare the results with those calculated using Hofstetter's formula. METHODS: In a cross-sectional study in 2015, random sampling was done from urban and rural populations of Shahroud, northern Iran. Participating schoolchildren were examined for manifest, cycloplegic and subjective refraction, as well as uncorrected vision and visual acuity...
May 17, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28513560/meta-chirality-fundamentals-construction-and-applications
#15
REVIEW
Xiaoliang Ma, Mingbo Pu, Xiong Li, Yinghui Guo, Ping Gao, Xiangang Luo
Chiral metamaterials represent a special type of artificial structures that cannot be superposed to their mirror images. Due to the lack of mirror symmetry, cross-coupling between electric and magnetic fields exist in chiral mediums and present unique electromagnetic characters of circular dichroism and optical activity, which provide a new opportunity to tune polarization and realize negative refractive index. Chiral metamaterials have attracted great attentions in recent years and have given rise to a series of applications in polarization manipulation, imaging, chemical and biological detection, and nonlinear optics...
May 17, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28513178/decoupling-the-effects-of-mass-density-and-hydrogen-oxygen-and-aluminum-based-defects-on-optoelectronic-properties-of-realistic-amorphous-alumina
#16
Vanessa Riffet, Julien Vidal
The search for functional materials is currently hindered by the difficulty to find significant correlation between constitutive properties of a material and its functional properties. In the case of amorphous materials, the diversity of local structures, chemical composition, impurities and mass densities makes such connection difficult to be addressed. In this letter, the relation between refractive index and composition has been investigated for amorphous AlOx materials, including non-stoichiometric AlOx, emphasizing the role of structural defects and the absence of effect of the band gap variation...
May 17, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28512581/refractive-lens-exchange-combined-with-primary-posterior-vitrectorhexis-in-highly-myopic-patients
#17
Tarek A Mohamed, Wael Soliman, Dalia M El Sebaity, Ahmed M Fathalla
Purpose. To evaluate efficacy and safety of primary vitrectorhexis for posterior capsulotomy in highly myopic patients undergoing refractive lens exchange. Methods. The study is a prospective nonrandomized interventional study. The study comprised 60 eyes of 60 myopic patients. All patients underwent refractive lens exchange (RLE) and foldable IOL implantation combined with primary posterior capsulotomy. We used a 23-gauge vitrectomy probe for the creation of the posterior capsule opening. We followed the patients for one year...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28512427/long-term-clinical-course-in-a-patient-with-complete-congenital-stationary-night-blindness
#18
Kentaro Kurata, Katsuhiro Hosono, Yoshihiro Hotta
BACKGROUND: This report describes a 45-year-old man with complete congenital stationary night blindness (CSNB1) who has been followed up for 38 years. CASE: The patient first visited our hospital as a 7-year-old boy with a complaint of low visual acuity. Best corrected visual acuity (BCVA) was 0.5 in the right eye and 0.6 in the left eye. The refractive error was approximately -5.0 D in both eyes. The fundus showed only myopic changes. A bright-flash electroretinogram (ERG) revealed a negative configuration...
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28511846/measuring-the-differences-in-work-ratios-between-pediatric-and-adult-ophthalmologic-examinations
#19
Joo Hyun, Jee Ho Chang, Seung Hoon Kim, Song Hee Park, Sunghoon Kim
PURPOSE: To assess the differences in work needed for pediatric and adult ophthalmologic examinations. METHODS: Seven ophthalmology residents conducted slit-lamp and refraction examinations on children 3-7 years of age and adults 20-69 years of age. The examiners reported the magnitude estimate (ME) of their work in relation to two references (cross-reference ME): average adult examination and average pediatric examination. The examination time was also measured...
May 13, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28511651/high-resolution-mucociliary-transport-measurement-in-live-excised-large-animal-trachea-using-synchrotron-x-ray-imaging
#20
Martin Donnelley, Kaye S Morgan, Maged Awadalla, Nigel R Farrow, Chris Hall, David W Parsons
BACKGROUND: The Australian Synchrotron Imaging and Medical Beamline (IMBL) was designed as the world's widest synchrotron X-ray beam, enabling both clinical imaging and therapeutic applications for humans as well as the imaging of large animal models. Our group is developing methods for imaging the airways of newly developed CF animal models that display human-like lung disease, such as the CF pig, and we expect that the IMBL can be utilised to image airways in animals of this size. METHODS: This study utilised samples of excised tracheal tissue to assess the feasibility, logistics and protocols required for airway imaging in large animal models such as pigs and sheep at the IMBL...
May 16, 2017: Respiratory Research
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