Read by QxMD icon Read


Wenjia Xie, Xia Zhang, Yesheng Xu, Yu-Feng Yao
OBJECTIVES: To assess the tear meniscus height (TMH), noninvasive tear breakup time (NITBUT), and bulbar redness in pediatric patients after orthokeratology (OK). METHODS: Pediatric patients who underwent overnight OK between December 2014 and November 2017 were retrospectively investigated. According to the time of wearing, subjects were divided into three groups: 1-week, 1-month, and over 1-year. Age-matched subjects were recruited as a control group. Keratograph 5M was used to assess TMH, NITBUT-first, NITBUT-average, and bulbar redness score...
March 16, 2018: Eye & Contact Lens
Alexandros A Fragkopoulos, Ekapop Pairam, Luka Marinkovic, Alberto Fernández-Nieves
We use toroidal droplets to study the breakup dynamics of a Newtonian liquid jet in the presence of rheologically nonlinear materials. We find that the droplets resist breakup for times that are longer than those in the presence of Newtonian liquids. More importantly, we show that our experiments can be explained by incorporating the nonlinearities into the linear treatment of the problem through the strain-rate-dependent viscosity. Finally, we show that the scaling factor required to relate the viscosity to the growth rate associated to unstable modes is given by the elastic modulus of the outside material, illustrating that both the viscoelastic and shear-thinning nature of the outside material play a crucial role in the dynamics of the problem...
February 2018: Physical Review. E
A Ponce-Torres, J M Montanero, M A Herrada, E J Vega, J M Vega
This corrects the article DOI: 10.1103/PhysRevLett.118.024501.
March 2, 2018: Physical Review Letters
Young Joon Choi, Si Yoon Park, Ikhyun Jun, Moonjung Choi, Kyoung Yul Seo, Eung Kweon Kim, Tae-Im Kim
PURPOSE: To evaluate perioperative dry eye (DE) syndrome and meibomian gland dysfunction (MGD) parameters associated with persistent DE symptoms after cataract surgery. METHODS: We enrolled patients who underwent uncomplicated cataract surgery without previous ocular comorbidities and previous use of ophthalmic treatment except for artificial tears at a single tertiary hospital. Lipid layer thickness, meibomian gland (MG) dropout, tear breakup time, Oxford staining score, lid margin abnormality, meibum quality, meibum expressibility, MG orifice obstruction, MGD stage, Ocular Surface Disease Index (OSDI), and Schirmer test score were prospectively assessed in order at baseline and 1 and 3 months postoperative...
March 14, 2018: Cornea
Longchao Yao, Jun Chen, Paul E Sojka, Xuecheng Wu, Kefa Cen
Dynamic stringy objects such as liquid rims and ligaments are frequently observed in important applications such as the multiphase breakup of fuel droplets. We develop a new method based on digital in-line holography to automatically measure complicated stringy objects. A static spring mounted on a rotator is measured to validate the effectiveness and accuracy of the method. The sections are extracted along the skeleton of the spring in a depth-of-field extended image and then sized and located as individual particles using a hybrid method...
March 15, 2018: Optics Letters
Emre Turkoz, Antonio Perazzo, Hyoungsoo Kim, Howard A Stone, Craig B Arnold
Understanding jet formation from non-Newtonian fluids is important for improving the quality of various printing and dispensing techniques. Here, we use a laser-based nozzleless method to investigate impulsively formed jets of non-Newtonian fluids. Experiments with a time-resolved imaging setup demonstrate multiple regimes during jet formation that can result in zero, single, or multiple drops per laser pulse. These regimes depend on the ink thickness, ink rheology, and laser energy. For optimized printing, it is desirable to select parameters that result in a single-drop breakup; however, the strain-rate dependent rheology of these inks makes it challenging to determine these conditions a priori...
February 16, 2018: Physical Review Letters
Huang Guannan, Su Long, Hua Xia, Wang Dong, Zhao Shaozhen
OBJECTIVE: To assess the clinical characteristics and changes in ocular surface cytology of dry eye in patients with systemic autoimmune disease. METHODS: The case-control study was conducted in the Second Hospital of Tianjin Medical University, Tianjin, China, from February 2016 to January 2017, and comprised systemic autoimmune disease patients and healthy controls. Schirmer's I test, tear breakup time test, and fluorescein staining were performed on all subjects...
March 2018: JPMA. the Journal of the Pakistan Medical Association
Abdulrahman AlDarrab, Yasser H Al-Faky, Ahmed Mousa, Adel H Alsuhaibani
PURPOSE: To study the effect of trachoma on meibomian glands using infrared meibography and to correlate the results with tear film parameters. METHODS: This is a prospective cohort study in which 86 eyes of healthy volunteers and 90 eyes with trachoma were included. Clinical assessment was performed including the following: slit-lamp examination looking for signs of sequelae of trachoma, tear breakup time (TBUT), superficial punctate keratopathy (SPK), Schirmer II test (with anesthesia), and meibum score...
April 2018: Cornea
Sezen Karakus, Alan N Baer, Devika Agrawal, Merve Gurakar, Robert W Massof, Esen K Akpek
PURPOSE: To investigate the value of 3 novel autoantibodies [salivary protein 1 (SP1), carbonic anhydrase 6 (CA6), and parotid secretory protein (PSP)] in differentiating Sjögren's syndrome (SS)-related dry eye from non-SS dry eye. METHODS: Forty-six dry eye patients with SS (SS dry eye), 14 dry eye patients without SS (non-SS dry eye), and 25 controls were included. The 2012 American College of Rheumatology classification criteria were used for the diagnosis of SS...
April 2018: Cornea
Keisuke Ikeda, Cem Simsek, Takashi Kojima, Kazunari Higa, Motoko Kawashima, Murat Dogru, Takahiko Shimizu, Kazuo Tsubota, Jun Shimazaki
PURPOSE: The purpose of the study is to investigate the effect of 3% diquafosol sodium eye drops on meibomian gland and ocular surface alterations in the superoxide dismutase-1 (Sod1-/- ) mice in comparison to the wild-type mouse. METHODS: Three percent diquafosol sodium eye drop was instilled to 20 eyes of 10 50-week-old male Sod1-/- mice and 22 eyes of 11 C57BL/6 strain 50-week-old wild-type (WT) male mice six times a day for 2 weeks. Aqueous tear secretion quantity was measured with phenol red-impregnated cotton threads without anesthesia...
February 27, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
Yingnan Shen, Liang Hu, Wenyu Chen, Haibo Xie, Xin Fu
A new fluid encapsulation structure, which is characterized by a bubble encapsulating a drop, is reported. It is stably generated from the breakup of a liquid column inside a bubble, which is achieved via the injection of Taylor flow into liquid. A model is constructed to explain the liquid column breakup mechanism. A dimensionless control guidance, which enables the possibility to create different-scale capsules, is provided. The encapsulation stability in external flows is verified, and a method to trigger the release of the encapsulated drop is provided, which supports potential applications with great advantages such as fluid transport...
February 2, 2018: Physical Review Letters
Eirini Nitoda, Anastasios Lavaris, Konstantinos Laios, Sophia Androudi, Chris D Kalogeropoulos, Michael Tsatsos, Christos Damaskos, Nikolaos Garmpis, Marilita M Moschos
BACKGROUND/AIM: Acute allergic rhinoconjuctivitis is the most common form of ocular allergies. The pathogenetic mechanisms are based on an immunoglobulin E (IgE)-mediated hypersensitivity reaction. On the other hand, tear osmolarity has been suggested to be an index of ocular surface damage and inflammation. These data were the motive to investigate the levels of tear osmolarity in subjects with acute allergic rhinoconjuctivitis, before and after administration of artificial tears. PATIENTS AND METHODS: Forty-five subjects with acute allergic rhinoconjuctivitis were randomly divided into three groups, based on the type of artificial tears that they received: Group A (Thera tears), Group B (Wet therapy) and Group C (Tears Naturale free)...
March 2018: In Vivo
Wenzhang Xie, Liang Zeng, Ying Tao, Yingfan Zhou, Ran Zhao, Xinyun Huang, Wenguang Hou, Ren Zhang, Lei Zong
OBJECTIVE: To observe the clinical efficacy differences between different needling methods for dry eye syndrome. METHODS: Sixty patients of dry eye syndrome were randomly divided into an observation group and a control group, 30 cases (60 eyes) in each group. Shangjingming (Extra), Xiajingming (Extra), Tongziliao (GB 1), Cuanzhu (BL 2), Fengchi (GB 20), Hegu (LI 4), Sanyinjiao (SP 6), Taixi (KI 3) and Taichong (LR 3) were selected in the two groups. The control group was treated with conventional acupuncture, while the observation group was treated with guiding- qi acupuncture...
February 12, 2018: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
Chandranath Basak, Henning Fröllje, Frank Lamy, Rainer Gersonde, Verena Benz, Robert F Anderson, Mario Molina-Kescher, Katharina Pahnke
Stratification of the deep Southern Ocean during the Last Glacial Maximum is thought to have facilitated carbon storage and subsequent release during the deglaciation as stratification broke down, contributing to atmospheric CO2 rise. Here, we present neodymium isotope evidence from deep to abyssal waters in the South Pacific that confirms stratification of the deepwater column during the Last Glacial Maximum. The results indicate a glacial northward expansion of Ross Sea Bottom Water and a Southern Hemisphere climate trigger for the deglacial breakup of deep stratification...
February 23, 2018: Science
Emile Gluck-Thaler, Jason C Slot
The fitness and evolution of prokaryotes and eukaryotes are affected by the organization of their genomes. In particular, the physical clustering of genes can coordinate gene expression and can prevent the breakup of co-adapted alleles. Although clustering may thus result from selection for phenotype optimization and persistence, the impact of environmental selection pressures on eukaryotic genome organization has rarely been systematically explored. Here, we investigated the organization of fungal genes involved in the degradation of phenylpropanoids, a class of plant-produced secondary metabolites that mediate many ecological interactions between plants and fungi...
February 20, 2018: ISME Journal
Chi Hoang Viet Vu, Motoko Kawashima, Masakazu Yamada, Kazuhisa Suwaki, Miki Uchino, Chika Shigeyasu, Yoshimune Hiratsuka, Norihiko Yokoi, Kazuo Tsubota
PURPOSE: To evaluate the effect of meibomian gland dysfunction (MGD) and friction-related disease (FRD) on the severity of dry eye disease (DED). DESIGN: Cross-sectional observational study. PARTICIPANTS: This study enrolled 449 patients with DED (63 men and 386 women; mean age, 62.6±15.7 years [range, 21-90 years]) for analysis. METHODS: Subjective symptoms, the ocular surface, tear function, and the presence of MGD and FRD (superior limbic keratoconjunctivitis, conjunctivochalasis, and lid wiper epitheliopathy) were investigated...
February 16, 2018: Ophthalmology
Herendra Kumar, Pragya Bhatt, C P Safvan, Jyoti Rajput
Events from the sequential and concerted modes of the fragmentation of OCS 3+ that result in coincident detection of fragments C + , O + , and S + have been separated using a newly proposed representation. An ion beam of 1.8 MeV Xe 9+ is used to make the triply charged molecular ion, with the fragments being detected by a recoil ion momentum spectrometer. By separating events belonging exclusively to the sequential mode of breakup, the electronic states of the intermediate molecular ion (CO 2+ or CS 2+ ) involved are determined, and from the kinetic energy release spectra, it is shown that the low lying excited states of the parent OCS 3+ are responsible for this mechanism...
February 14, 2018: Journal of Chemical Physics
G A Basheed, Komal Jain, Saurabh Pathak, R P Pant
We investigate the effect of dilution on dipolar interaction with linear and non-linear rheological properties of kerosene based magnetic fluid. The steady-state behavior demonstrate a shear thinning behavior and corroborated with a power law, (η = c <mml:math display="block"> <mml:mover accent="true"> <mml:mi>γ</mml:mi> <mml:mo>˙</mml:mo> </mml:mover></mml:math>n + η∞) exponent, n ≤ 1. The shear-induced-breakup (separation) of nanoparticles and the yielding behavior has been explained by Bingham model...
April 1, 2018: Journal of Nanoscience and Nanotechnology
Prafulla K Maharana, Sapna Raghuwanshi, Ashish K Chauhan, Vaishali G Rai, Rajesh Pattebahadur
PURPOSE: To compare the efficacy of carboxymethylcellulose 0.5% (CMC), hydroxypropyl-guar containing polyethylene glycol 400/propylene glycol (PEG/PG), and hydroxypropyl methylcellulose 0.3% (HPMC) as tear substitutes in patients with dry eye. METHODS: A retrospective evaluation of cases presenting with symptoms of dry eye from July 2014 to June 2015 was done. Patients with Ocular Surface Disease Index (OSDI) scoring >12 were included in the study. Parameters such as age, gender, Schirmer test (ST), and tear film breakup time (TBUT) were recorded on day 0, week 1, and week 4...
October 2017: Middle East African Journal of Ophthalmology
Thomas Bourguignon, Tang Qian, Simon Y W Ho, Frantisek Juna, Zongqing Wang, Daej A Arab, Stephen L Cameron, James Walker, David Rentz, Theodore A Evans, Nathan Lo
Following the acceptance of plate tectonics theory in the latter half of the 20th century, vicariance became the dominant explanation for the distributions of many plant and animal groups. In recent years, however, molecular-clock analyses have challenged a number of well-accepted hypotheses of vicariance. As a widespread group of insects with a fossil record dating back 300 million years, cockroaches provide an ideal model for testing hypotheses of vicariance through plate tectonics vs transoceanic dispersal...
February 6, 2018: Molecular Biology and Evolution
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"