37,139 results match your criteria Orbit: The International Journal on Orbital Disorders Oculoplastic and Lacrimal Surgery [Journal]


A Prospective Comparative Study Between Subcuticular and Sutureless Technique of Skin Closure Following External Dacryocystorhinostomy.

Ophthalmic Plast Reconstr Surg 2018 Dec 7. Epub 2018 Dec 7.

Orbit Oculoplasty Reconstructive and Aesthetic Services, Aditya Birla Sankara Nethralaya, Kolkata, India.

Purpose: To compare the cosmetic outcome of the surgical scar of external dacryocystorhinostomy by the subcuticular versus sutureless technique.

Methods: This was a prospective interventional randomized control study conducted at tertiary level hospital. Fifty patients of primary-acquired nasolacrimal duct obstruction were included in this study. Read More

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December 2018
1 Read

Bony Orbital Volume Expansion in Thyroid Eye Disease.

Ophthalmic Plast Reconstr Surg 2018 Dec 7. Epub 2018 Dec 7.

Doheny Eye Institute, Division of Orbital and Ophthalmic Plastic Surgery, University of California-Los Angeles, Los Angeles, California, U.S.A.

Purpose: To quantify changes to the bony orbital volume (BOV) in patients with thyroid eye disease (TED) relative to normal controls.

Methods: In this case-control study, all patients affected with TED seen over a 2-year period were screened for study entry. Eligible participants were adults with clinical evidence of TED and CT scans of their orbits obtained during the course of their routine care. Read More

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December 2018
1 Read

A Rare Cause for Recurrent Implant-Related Inflammation of Orbit: Dacryocystitis.

J Craniofac Surg 2018 Dec 13. Epub 2018 Dec 13.

Plastic, Reconstructive, and Aesthetic Surgery Department of Mersin University Medical Faculty, Mersin, Turkey.

Ultra-thin porous polyethylene has been widely preferred in orbital blow out fracture repair for many years as a safe and stable material. Delayed complications related to the implant in orbital blow out fracture repair are very rare and usually begin as a periorbital inflammation. Infections and tissue reaction to the foreign body are regarded as main causes for implant-related inflammation of which symptoms may vary among the patients and may involve subacute and chronic eyelid swelling, skin redness, pain, conjunctival injection, proptosis, and acute orbital inflammation. Read More

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December 2018
1 Read

Topological Hourglass Dirac Semimetal in the Nonpolar Phase of Ag_{2}BiO_{3}.

Phys Rev Lett 2018 Nov;121(22):226401

Department of Physics, Northeastern University, Boston, Massachusetts 02115, USA.

Materials with tunable charge and lattice degrees of freedom provide excellent platforms for investigating multiple phases that can be controlled via external stimuli. We show how the charge-ordered ferroelectric oxide Ag_{2}BiO_{3}, which has been realized experimentally, presents a unique exemplar of a metal-insulator transition under an external electric field. Our first-principles calculations, combined with a symmetry analysis, reveal the presence of a nearly ideal hourglass-Dirac-semimetal state in the nonpolar structure of Ag_{2}BiO_{3}. Read More

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November 2018

Elucidating cation-cation interactions in neptunyl dications using multi-reference ab initio theory.

Phys Chem Chem Phys 2018 Dec 14. Epub 2018 Dec 14.

Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń, Grudziądzka 5, 87-100 Toruń, Poland.

Understanding the binding mechanism in neptunyl clusters formed due to cation-cation interactions is of crucial importance in nuclear waste reprocessing and related areas of research. Since experimental manipulations with such species are often rather limited, we have to rely on quantum-chemical predictions of their electronic structures and spectroscopic parameters. In this work, we present a state-of-the-art quantum chemical study of the T-shaped and diamond-shaped neptunyl(v) and neptunyl(vi) dimers. Read More

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December 2018

Revealing hidden spin-momentum locking in a high-temperature cuprate superconductor.

Science 2018 Dec 13;362(6420):1271-1275. Epub 2018 Dec 13.

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

Cuprate superconductors have long been thought of as having strong electronic correlations but negligible spin-orbit coupling. Using spin- and angle-resolved photoemission spectroscopy, we discovered that one of the most studied cuprate superconductors, Bi2212, has a nontrivial spin texture with a spin-momentum locking that circles the Brillouin zone center and a spin-layer locking that allows states of opposite spin to be localized in different parts of the unit cell. Our findings pose challenges for the vast majority of models of cuprates, such as the Hubbard model and its variants, where spin-orbit interaction has been mostly neglected, and open the intriguing question of how the high-temperature superconducting state emerges in the presence of this nontrivial spin texture. Read More

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December 2018
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Volume-staged Gamma Knife radiosurgery for orbital venous malformations.

Authors:

J Neurosurg 2018 Dec;129(Suppl1):26-30

OBJECTIVEThis article is a preliminary evaluation of the efficacy of volume-staged Gamma Knife radiosurgery (GKRS) in the treatment of patients with orbital venous malformations (OVMs).METHODSTwenty patients with moderate to large OVMs were treated with volume-staged GKRS between March 2005 and October 2015. The series included 8 male and 12 female patients with an average age of 22. Read More

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December 2018

Field ultrasound evaluation of some gestational parameters in jennies.

Theriogenology 2018 Nov 22;126:95-105. Epub 2018 Nov 22.

Department of Veterinary Science, University of Torino, Largo Braccini 2/4, 10095, Grugliasco, TO, Italy.

The aim of this study was to collect and analyze ultrasound measurements of fetal-maternal structures during normal and pathological pregnancies in jennies, a livestock species of growing interest. For two breeding seasons, 38 jennies of different breeds and crossbreeds aged between 3 and 18 years were monitored weekly by transrectal examination using a portable Esaote ultrasound (MyLab™ 30 GOLD VET) with a 5-7.5 MHz probe. Read More

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November 2018

Photophysical and photochemical insights of the photodegradation of norfloxacin: The rate-limiting step and the influence of Ca ion.

Chemosphere 2018 Dec 4;219:236-242. Epub 2018 Dec 4.

State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.

Photodegradation is one of the major degradation paths for antibiotics as aquatic micropollutants in surface water. The photodegradation involves a number of complicated photophysical and photochemical processes. Exploration for the rate-limiting step among these processes can be essential for the elimination of antibiotics. Read More

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December 2018

Nonadiabatic dynamics simulations of singlet fission in 2,5-bis(fluorene-9-ylidene)-2,5-dihydrothiophene crystals.

Phys Chem Chem Phys 2018 Dec 13. Epub 2018 Dec 13.

Dipartimento di Chimica e Chimica Industriale, Università di Pisa, v. G. Moruzzi 13, I-56124 Pisa, Italy.

We present simulations of the singlet fission dynamics in 2,5-bis(fluorene-9-ylidene)-2,5-dihydrothiophene (ThBF), a thienoquinoid compound recently investigated experimentally by Kawata et al. The simulation model consisted of two ThBF molecules embedded in their crystal environment. The aim was to understand the singlet fission mechanism, and to predict the excited state lifetimes and the singlet fission quantum yield, hitherto unknown. Read More

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December 2018

SLE dacryoadenitis.

Orbit 2018 Dec 12:1-4. Epub 2018 Dec 12.

a Department of Ophthalmology , Christchurch Hospital , Christchurch , New Zealand.

In systemic lupus erythematosus, ophthalmic manifestations are noted in up to one-third of patients. We describe a patient with an unusual initial presentation of this disorder. Read More

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December 2018

The treatment results in patients with lmphoma disease in the orbit.

Cesk Slov Oftalmol 2018 ;73(5-6):211-217

Introduction: Lymphoma is a malignant disease that can affect several structures of the orbit and eye adnexa. In the area of orbit the non-Hodgkins lymphoma (NHL) is typical, which may be indolent or aggressive. Indolent subtypes include MALT (mucosa-associated lymphoid tissue), follicular lymphoma (FL), lymphoplasmocytic lymphoma (LPL). Read More

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January 2018

Merkel cell carcinoma of the eyelid and orbit.

Cesk Slov Oftalmol 2018 ;74(1):37-43

The incidence of Merkel cell carcinoma has tended to increase worldwide in recent years. Merkel cell carcinoma is a rare tumor of the skin that occurs mainly in the sun exposed sites. The malignant reversal of Merkel cells is currently associated with an infection caused by a Merkel cell polyomavirals. Read More

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January 2018

Optic nerve orbital meningioma.

Cesk Slov Oftalmol 2018 ;74(1):23-30

Introduction: Orbital meningioma treatment has achieved significant success over the last period. Primary optic nerve sheath meningiomas by the clinically progressive finding, but still persistent sufficient visual acuity, can be treated by fractionated stereotactic radiotherapy. Surgery is indicated for secondary meningiomas of the orbit. Read More

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January 2018

Imaging Evaluation of the Orbit in Graves Ophthalmopathy.

Curr Health Sci J 2015 Jul-Sep;41(3):285-287. Epub 2015 Mar 15.

Radiology and Imaging Department, University of Medicine and Pharmacy of Craiova.

Diagnosis of Graves ophthalmopathy is based on the typical eye signs and symptoms, the exclusion of other orbital pathologies and evidence of thyroid autoimmunity. We report the case of a non-smoker 61 years old woman, known with Graves disease, which performed a 3T MRI examination in order to evaluate the orbits. The MRI exam revealed eye protrusion, increased orbital fat with compression on the optic nerve and increased volume of the extraocular muscles. Read More

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Detailed benchmark ab initio mapping of the potential energy surfaces of the X + CH [X = F, Cl, Br, I] reactions.

Phys Chem Chem Phys 2018 Dec 7. Epub 2018 Dec 7.

Interdisciplinary Excellence Centre and Department of Physical Chemistry and Materials Science, Institute of Chemistry, University of Szeged, Rerrich Béla tér 1, Szeged H-6720, Hungary.

We investigate three reaction pathways of the X + C2H6 [X = F, Cl, Br, I] reactions: H-abstraction, methyl-substitution, and H-substitution, with the latter two proceeding via either Walden-inversion or front-side-attack mechanisms. We report classical and adiabatic relative energies of unprecedented accuracy for the corresponding stationary points of the reaction potential energy surfaces (PESs) by augmenting the CCSD(T)-F12b/aug-cc-pVQZ energies by core-correlation, post-CCSD(T) and spin-orbit corrections. Taking these correction terms into account turns out to be essential to reach subchemical, i. Read More

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December 2018

Monoclinic SrIrO3 - A Dirac semimetal produced by non-symmorphic symmetry and spin-orbit coupling.

J Phys Condens Matter 2018 Dec 5. Epub 2018 Dec 5.

Max Planck Institute for Solid State Research, Stuttgart, GERMANY.

SrIrO<sub>3</sub> crystallizes in a monoclinic structure of distorted hexagonal perovskite at ambient pressure. The transport measurements show that the monoclinic SrIrO<sub>3</sub> is a low-carrier density semimetal, as in the orthorhombic perovskite polymorph. The electronic structure calculation indicates a semimetallic band structure with Dirac bands at two high-symmetry points of Brillouin zone only when spin-orbit coupling is incorporated, suggesting that the semimetallic state is produced by the strong spin-orbit coupling. Read More

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December 2018

Probing the magnetoelectric effect in noncentrosymmetric superconductors by equal-spin Andreev tunneling.

Authors:
Gregor Tkachov

J Phys Condens Matter 2018 Nov 23. Epub 2018 Nov 23.

Institut für Physik, Universitat Augsburg Mathematisch-Naturwissenschaftliche Fakultat, Universitätsstrasse 1, Augsburg, 86135, GERMANY.

In noncentrosymmetric superconductors (NCSs), the conversion of a charge current into spin magnetization - the so called magnetoelectric effect - is the direct indicator of the unconventional, mixed-parity order parameter. This paper proposes a scheme to detect the magnetoelectric effect by anomalous, equal-spin Andreev tunneling in NCS/ferromagnet contacts. The proposal relies on the ability to generate spin-polarized triplet pairing by passing an electric current through an NCS. Read More

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November 2018

Orbiton-Phonon coupling in Ir5+(5d4) double perovskite Ba2YIrO6.

J Phys Condens Matter 2018 Nov 26. Epub 2018 Nov 26.

School of Basic Sciences, Indian Institute of Technology Mandi, Mandi-175005, India, Mandi, INDIA.

Ba2YIrO6, a Mott insulator, with four valence electrons in Ir5+ d-shell (5d4) is supposed to be non-magnetic, with Jeff = 0, within the atomic physics picture. However, recent suggestions of non-zero magnetism have raised some fundamental questions about its origin. We focus on the phonon dynamics, probed via Raman scattering, as a function of temperature and different incident photon energies, as an external perturbation. Read More

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November 2018

First-principles investigation of the interface magnetic anisotropy of Fe/SrTiO3.

J Phys Condens Matter 2018 Nov 30. Epub 2018 Nov 30.

Key Laboratory of Polar Materials and Devices, East China Normal University, No.500, DongChuan Road, ShangHai, 200241, CHINA.

Interface effects in the magnetic nanostructures play a critical role in the magnetic properties. By using the first-principles density functional theory calculations, we investigate the electronic and magnetic properties of Fe/SrTiO3 interfaces, in which both the nonpolar surface SrTiO3(001) and the polar surface SrTiO3(110) are considered. A particular emphasis is placed on the magnetic anisotropy energy (MAE). Read More

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November 2018

Paraneoplastic syndrome - a rare but treatable cause of non-thyroid-related extraocular muscle enlargement.

Authors:
S Kumar T Diamond

Orbit 2018 Dec 7:1-6. Epub 2018 Dec 7.

b Professor in Endocrinology , St George Public Hospital , Kogarah , NSW , Australia.

Paraneoplastic syndrome is a rare but reversible cause of non-thyroid-related extraocular muscle enlargement. We present a 71-year-old lady with diplopia, restricted eye movements, suppressed thyroid-stimulating hormone and enlargement of all extraocular muscles while on thyroxine replacement for hypothyroidism. She had distant history of metastatic breast cancer treated with chemotherapy, surgical resection and tamoxifen. Read More

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December 2018

The eye of the beholder: orbital metastases from midgut neuroendocrine tumors, a two institution experience.

Cancer Imaging 2018 Dec 6;18(1):47. Epub 2018 Dec 6.

Department of Internal Medicine, Stanford University Medical Center, Stanford, CA, USA.

Background: Metastases to the orbit occur rarely in midgut neuroendocrine tumor (NET) patients with only 20 cases reported to date. Patients typically present with bilateral involvement of the recti muscles and experience symptoms such as diplopia, proptosis, and decreased vision. Although orbital MRI remains the gold standard for imaging orbital disease, many orbital lesions are now detected on somatostatin-receptor (SSTR) based imaging such as 68Ga-DOTATATE PET-CT. Read More

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December 2018

Dry eye after Lester Jones tube insertion for epiphora.

Orbit 2018 Dec 7:1-5. Epub 2018 Dec 7.

a Corneoplastic Unit , Queen Victoria Hospital NHS Trust , East Grinstead , UK.

Purpose: To report the occurrence of dry eye after Lester Jones tube (LJT) insertion.

Methods: Retrospective case series from a single unit. The dacrocystorhinostomy (DCR) was carried out using both endoscopic and external approachs; however, insertion of LJT used the same method as either a primary or secondary procedure. Read More

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December 2018

All-Silicon Topological Semimetals with Closed Nodal Line.

J Phys Chem Lett 2018 Dec 12. Epub 2018 Dec 12.

Owing to the natural compatibility with current semiconductor industry, silicon allotropes with diverse structural and electronic properties provide promising platforms for the next-generation Si-based devices. After screening 230 all-silicon crystals in the zeolite frameworks by first-principles calculations, we disclose two structurally stable Si allotropes (AHT-Si and VFI-Si) containing open channels as topological node-line semimetals with Dirac nodal points forming a nodal loop in the k=0 plane of Brillouin zone. Interestingly, their nodal loops protected by inversion and time-reversal symmetries are robust against SU(2) symmetry breaking due to very weak spin-orbit coupling of Si. Read More

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December 2018
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Correspondence between electronic structure calculations and simulations: nonadiabatic dynamics in CS.

Phys Chem Chem Phys 2018 Dec 12. Epub 2018 Dec 12.

EaStCHEM, School of Chemistry, University of Edinburgh, David Brewster Road, EH9 3FJ Edinburgh, UK.

The choice of ab initio electronic structure method is an important factor in determining the fidelity of nonadiabatic dynamics simulations. We present an in-depth comparison of two simulations of photodissociation in the CS2 molecule following excitation to the 11B2 state. The simulations account for nonadiabatic and spin-orbit coupling, and are performed using the SHARC surface-hopping approach combined with state-averaged SA8-CASSCF(8,6)/SVP and SA8-CASSCF(10,8)/SVP ab initio calculations, with additional reference calculations at the MRCI(14,10)/aug-cc-pvTZ level. Read More

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December 2018

Efficacy and safety of pulsed intravenous methylprednisolone in early active thyroid eye disease.

Orbit 2018 Dec 12:1-8. Epub 2018 Dec 12.

a Division of Orbit & Oculofacial Surgery, Department of Ophthalmology , National University Hospital , Singapore , Singapore.

Introduction: The mainstay of therapy for active inflammatory phase of thyroid eye disease (TED) is immunosuppression. Patients in our centre with early active TED are treated with pulsed intravenous methylprednisolone (IVMP). Two different protocols are offered in our centre: High dose (1g/day for 3 days, monthly for 6 months), or EUGOGO protocol (500 mg weekly for six weeks, followed by 250 mg weekly for the next 6 weeks). Read More

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December 2018
2 Reads

Readout and control of the spin-orbit states of two coupled acceptor atoms in a silicon transistor.

Sci Adv 2018 Dec 7;4(12):eaat9199. Epub 2018 Dec 7.

School of Physics and Australian Centre of Excellence for Quantum Computation and Communication Technology, UNSW, Sydney, Australia.

Coupling spin qubits to electric fields is attractive to simplify qubit manipulation and couple qubits over long distances. Electron spins in silicon offer long lifetimes, but their weak spin-orbit interaction makes electrical coupling challenging. Hole spins bound to acceptor dopants, spin-orbit-coupled = 3/2 systems similar to Si vacancies in SiC and single Co dopants, are an electrically active spin system in silicon. Read More

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December 2018

ORBIT: a New Paradigm for Genetic Engineering of Mycobacterial Chromosomes.

MBio 2018 Dec 11;9(6). Epub 2018 Dec 11.

Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, Massachusetts, USA

Two efficient recombination systems were combined to produce a versatile method for chromosomal engineering that obviates the need to prepare double-stranded DNA (dsDNA) recombination substrates. A synthetic "targeting oligonucleotide" is incorporated into the chromosome via homologous recombination mediated by the phage Che9c RecT annealase. This oligonucleotide contains a site-specific recombination site for the directional Bxb1 integrase (Int), which allows the simultaneous integration of a "payload plasmid" that contains a cognate recombination site and a selectable marker. Read More

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December 2018
1 Read

Cerebral Venous Thrombosis: An Uncommon Cause of Papilledema on Bedside Ocular Ultrasound.

J Emerg Med 2018 Dec 8. Epub 2018 Dec 8.

Department of Emergency Medicine, University of Florida College of Medicine - Jacksonville, Jacksonville, Florida.

Background: Cerebral venous thrombosis (CVT) is a rare, difficult-to-diagnose form of venous thromboembolic disease and is considered a type of stroke. Its presentation is highly variable and may be easily confused for more common and less debilitating or life-threatening diagnoses such as migraine, seizure, or idiopathic intracranial hypertension.

Case Report: A 25-year-old woman presented with a complaint of bifrontal throbbing headache and blurry vision. Read More

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December 2018

Lens dose-response prediction modeling and cataract incidence in retinoblastoma patients after lens-sparing or whole-eye radiotherapy.

Int J Radiat Oncol Biol Phys 2018 Dec 8. Epub 2018 Dec 8.

Department of Radiation Oncology, Keck School of Medicine of USC and Children's Hospital Los Angeles, Los Angeles, CA. Electronic address:

Purpose: We retrospectively assessed the incidence of cataracts in retinoblastoma (Rb) patients treated with either lens-sparing (LSRT) or whole-eye radiotherapy (WERT). A secondary aim of this study was to model the dose-response risk of cataract.

Methods: We reviewed 65 retinoblastoma patients treated with radiotherapy (RT) at XXXX from 1997-2015. Read More

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December 2018

Basal cell carcinoma and basosquamous carcinoma, two faces of the same condition?

Rom J Morphol Embryol 2018 ;59(3):989-996

Department of Microscopic Morphology, "Victor Babeş" University of Medicine and Pharmacy, Timişoara, Romania; Department of Otorhinolaryngology, "Victor Babeş" University of Medicine and Pharmacy, Timişoara, Romania;

Basal cell carcinoma (BCC) is the most common locally invasive malignant epidermal neoplasm. It is generally a tumor that runs a slow progressive course and can usually be cured by surgery. Basosquamous carcinoma is considered by some authors a rare subtype of BCC, while others describe it as independent tumor with different evolution from BCC. Read More

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January 2018

Mixed (nodular and morpheic) upper eyelid basal cell carcinoma with orbital invasion - histological and clinical features.

Rom J Morphol Embryol 2018 ;59(3):977-983

Department of Plastic Surgery, "Grigore T. Popa" University of Medicine and Pharmacy, Iaşi, Romania;

Basal cell carcinoma (BCC) is the most common type of cancer located in the periocular area. We will present the clinical case of a 63-year-old male patient who was admitted to the 2nd Clinic of Neurosurgery, "Prof. Dr. Read More

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January 2018

Photoelectron spectroscopic study of I·ICF: a frontside attack S2 pre-reaction complex.

Phys Chem Chem Phys 2018 Dec 11. Epub 2018 Dec 11.

Department of Chemistry, Durham University, Durham DH1 3LE, UK.

Photodetachment and 2D photoelectron spectra of the mass-selected I-·CF3I complex are presented together with electronic structure calculations. Calculations show that the I- is located at the iodine side of CF3I. Vertical and adiabatic detachment energies were measured at 4. Read More

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December 2018

Facial Malformation in Crouzon's Syndrome Is Consistent with Cranial Base Development in Time and Space.

Plast Reconstr Surg Glob Open 2018 Oct 1;6(10):e1963. Epub 2018 Oct 1.

Section of Plastic and Reconstructive Surgery, Yale School of Medicine, New Haven, Conn.

Background: In Crouzon's syndrome, cranial base deformities begin sequentially in the anterior cranial fossa initially, and later to the posterior cranial base. Facial characteristics are likely related to cranial base development. The temporal correlation between cranial base development and facial features is in need of clarification in Crouzon's patients, to clarify initial sites of deformity, which may impact surgical decision making. Read More

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October 2018

Intersystem crossing in the exit channel.

Nat Chem 2018 Dec 10. Epub 2018 Dec 10.

Department of Chemistry, University of Missouri, Columbia, MO, USA.

Intersystem crossing plays an important role in photochemistry. It is understood to be efficient when heavy atoms are present due to strong spin-orbit coupling, or when strongly bound long-lived complexes are formed that increase the chance of finding the singlet-triplet intersection seam. Here we present evidence for a different intersystem crossing mechanism in the bimolecular reaction of O(P) with alkylamines. Read More

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December 2018

Quasi-degenerate magnetic states in α-RuCl.

J Phys Condens Matter 2019 Jan;31(2):025803

Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, People's Republic of China.

Exploring quantum spin liquid (QSL) state has both fundamental scientific value and realistic application potential. Recently, α-RuCl was experimentally observed to hold in-plane zigzag antiferromagnetic (AFM) order at low temperature, which was further proposed to be proximate to a Kitaev QSL ground state. We have studied the magnetic properties of α-RuCl in the framework of electronic structure calculation based on density functional theory (DFT) with Hubbard U correction (DFT+U) and spin-orbit coupling. Read More

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January 2019
3 Reads

Microgravity-induced hepatogenic differentiation of rBMSCs on board the SJ-10 satellite.

FASEB J 2018 Dec 6:fj201802075R. Epub 2018 Dec 6.

Key Laboratory of Microgravity, Center of Biomechanics and Bioengineering, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China.

Bone marrow-derived mesenchymal stem cells (BMSCs) are able to differentiate into functional hepatocytelike cells, which are expected to serve as a potential cell source in regenerative medicine, tissue engineering, and clinical treatment of liver injury. Little is known about whether and how space microgravity is able to direct the hepatogenic differentiation of BMSCs in the actual space microenvironment. In this study, we examined the effects of space microgravity on BMSC hepatogenic differentiation on board the SJ-10 Recoverable Scientific Satellite. Read More

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December 2018
4 Reads
5.043 Impact Factor

Traditional Chinese herbal medicine for vascular dementia.

Cochrane Database Syst Rev 2018 Dec 6;12:CD010284. Epub 2018 Dec 6.

Cochrane Singapore, Singapore Clinical Research Institute, Nanos Building #02-01, 31 Biopolis Way, Singapore, Singapore, 138669.

Background: Traditional Chinese herbal medicine (TCHM) is widely used for treating vascular dementia (VaD) in China. Recent studies of a number of TCHMs have demonstrated in vitro biological activity and therapeutic effects in animals, but the published clinical evidence has not been systematically appraised.

Objectives: To evaluate the efficacy and safety of TCHMs listed in either the Chinese Pharmacopoeia (CP) or the Chinese National Essential Drug List (NEDL) that are used to treat VaD. Read More

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December 2018
1 Read

Theoretical investigation on the optical and EPR spectra for Cu doped ZnO-CdS nanocomposites.

Magn Reson Chem 2018 Dec 5. Epub 2018 Dec 5.

Jiangxi Engineering Laboratory for Optoelectronics Testing Technology, Nanchang Hangkong University, Nanchang, 330063, P. R. China.

The three optical absorption bands and EPR parameters of the [CuO ] center in the ZnO-CdS composite nanopowders are theoretically studied from the perturbation formulas based on the cluster approach. In the formulas, the contributions to EPR parameters arising from the ligand orbital and spin-orbit coupling interactions via covalence effect are considered. For the studied [CuO ] cluster, the Cu-O bond lengthes are suggested to show a relative elongation ratio ρ (≈ 4. Read More

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December 2018
1 Read

A Stellar Imaging Error Correction Method Based on an Ellipsoid Model: Taking Ziyuan 3-02 Satellite Data Analysis as an Example.

Sensors (Basel) 2018 Dec 4;18(12). Epub 2018 Dec 4.

College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

Stellar point image coordinates are one of the important observations needed for high-precision space attitude measurement with a star sensor. High-coupling imaging errors occur under dynamic imaging conditions. Using the results of preliminary star point extraction from star sensor imaging data combined with a superimposed time series, we analyze the relative motion and trajectory based on the star point image, establish an image error ellipsoid fitting model based on the elliptical orbit of a satellite platform, and achieve geometric error correction of a star sensors' image star point using multi-parameter screening of the ambiguous solutions of intersection of the elliptic equations. Read More

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December 2018
1 Read

Non-invasive study of the three-dimensional structure of nanoporous triblock terpolymer membranes.

Soft Matter 2018 Dec;14(48):9750-9754

Spectroscopy of soft Matter, University of Bayreuth, Universitätsstraße 30, 94557 Bayreuth, Germany.

Nanoporous media are of great importance for drug delivery or filtration. Typically the pore structure of such media is characterized using high-resolution techniques such as electron microscopy or atomic force microscopy. However, these techniques are restricted to the surface of the material and/or are highly invasive. Read More

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December 2018

An unusual orbital tumor in an adult: Granuloma annulare.

Am J Ophthalmol Case Rep 2019 Mar 14;13:9-12. Epub 2018 Nov 14.

MUHC - McGill University Ocular Pathology Laboratory, 1001 Boul Decarie, Block E, E02.6217, Montreal, QC, H4A 3J1, Canada.

Purpose: Granuloma annulare (GA) is a rare clinical entity that does not classically arise from the peri-orbital area in adults. The purpose of this case report is to present a 69-year-old female with GA of the orbit. As well, the pathological and immunohistochemical features of these tumors will be discussed. Read More

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March 2019
1 Read

False-positive technetium-99m methylene diphosphonate bone scan activity in the orbit in a patient with a history of breast carcinoma.

World J Nucl Med 2018 Oct-Dec;17(4):299-301

Department of Ophthalmology and Visual Sciences, Washington University School of Medicine, St. Louis, MO, USA.

Metastasis of breast carcinoma to the orbit is an uncommon entity and carries a poor prognosis. This case report presents false-positive technetium-99m methylene diphosphonate activity in the right orbit of a patient with a history of a primary breast neoplasm. Orbital computed tomography imaging was obtained to further characterize the radiotracer uptake identified on the bone scan and demonstrated diffuse right globe intraocular calcifications secondary to degenerative intraocular changes. Read More

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December 2018
1 Read

Rosai-Dorfman disease with isolated lacrimal gland enlargement.

Oman J Ophthalmol 2018 Sep-Dec;11(3):297-299

Department of Orbit, Oculoplasty and Ocular Oncology, Giridhar Eye Institute, Kochi, Kerala, India.

Rosai-Dorfman Disease also called as Sinus Histiocytosis with Massive Lymphadenopathy is a rare, benign, idiopathic histiocytic proliferative disorder that occurs predominantly in children and young adults. Orbital involvement can occur in 11% of cases. Isolated lacrimal gland involvement without any local or systemic recurrence is very rare. Read More

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December 2018
1 Read

Bilateral orbital glial heterotopia: A rare case report.

Oman J Ophthalmol 2018 Sep-Dec;11(3):288-290

Department of Histopathology, Armed Forces Institute of Pathology, Rawalpindi, Pakistan.

Glial heterotopia is a rare congenital mass that often presents as a unilateral mass lesion in or around the nose. Complete surgical excision is the treatment of choice. However, before any surgical intervention for suspected glial heterotopia, distinction should be made both clinically and radiologically from the pathologically related encephalocele to prevent the risk of cerebrospinal fluid leak and meningitis. Read More

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December 2018
1 Read

A rare case of solitary unifocal Langerhans cell histiocytosis with orbital extension: Diagnostic dilemma.

Oman J Ophthalmol 2018 Sep-Dec;11(3):284-287

Department of Ophthalmology, University of Malaya Medical Centre, Kuala Lumpur, Malaysia.

Langerhans cell histiocytosis (LCH) is rarely encountered in ophthalmology practice. It is a spectrum of disorder characterized by accumulation of histiocytes in various tissues. Diagnosis is challenging as it may simulate periorbital hematoma, rhabdomyosarcoma, and neuroblastoma. Read More

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December 2018
1 Read

Large drusen in long-standing retinal detachment.

Oman J Ophthalmol 2018 Sep-Dec;11(3):272-273

Department of Ocular Pathology and Uveitis, Sankara Nethralaya, Chennai, Tamil Nadu, India.

Drusen are seen as an end result of various biochemical insults to the retina and have been described in various clinical settings. We would like to report the histopathology of a case of large drusen, seen associated with chronic retinal detachment in a case of childhood trauma, where the eye was eviscerated for other reasons. Read More

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December 2018
1 Read

Epithelioid hemangioma of the orbit treated with oral propranolol in adult.

Can J Ophthalmol 2018 Dec 3;53(6):e244-e246. Epub 2018 Apr 3.

Pusan National University School of Medicine, Yangsan, South Korea. Electronic address:

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December 2018
1 Read

Space qualified microwave source for cold atom clock operating in orbit.

Rev Sci Instrum 2018 Nov;89(11):113115

Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.

The space cold atom clock (CAC) suffers more degradation of frequency stability from the local oscillator noise compared with fountain clocks operating on the ground because of the larger dead time of the clock cycle. Therefore, low phase noise is required for the microwave source of the space CAC in addition to robustness, compactness, and adaptability to the space environment. This paper presents the design and measurements of a low-phase-noise space qualified microwave source for the cold atom clock experiment in space CAC operating in the Tiangong-2 Chinese space laboratory. Read More

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November 2018