Microsecond hydrodynamic relationships inside heavy colloidal dispersions probed at the European XFEL

reful examination of the raw B-scan images of both the RNFL and macula is critical to identify artifacts and true glaucoma progression.
Artifacts are highly prevalent on both circumpapillary RNFL and macular scans on SDOCT images acquired in a glaucoma clinic. Artifacts can lead to false-positive and false-negative interpretation of progression when using only the auto-segmentation change maps. Thus, careful examination of the raw B-scan images of both the RNFL and macula is critical to identify artifacts and true glaucoma progression.
Most reports of strabismus after glaucoma drainage device implantation study larger devices and rarely note the incidence of strabismus after Ahmed glaucoma valve (AGV) implantation. SB203580 It is unknown if the pattern of strabismus is similar with smaller devices. We investigated characteristics of strabismus after AGV implantation.
Retrospective review.
Institutional study of 732 patients at our institution undergoing AGV implantation between 2013 and 2018. Rate and characteristics of strabismus were the primary outcome; age, gender, and location of AGVs were also analyzed.
We identified 29 patients who developed new-onset strabismus postoperatively after initial AGV implantation, for 4% incidence of strabismus. Twenty-one (72%) of these had diplopia. AGVs were implanted superotemporally in 21, superonasally in 5, inferotemporally in 1, and inferonasally in 2. Three patients were esotropic, 11 were exotropic, 4 had hypertropia, 2 had hypotropia, and 9 patients had combined horizontal/vertical strabismus (elity of this complication should be discussed with patients prior to surgery.
To report on 2-year results of accelerated corneal collagen cross-linking (CXL) in progressive ectasia using the Avedro KXL system.
Prospective interventional case series.
A total of 870 patients (1,192 eyes) attending Moorfields Eye Hospital after CXL were included. All patients undergoing CXL had progressive keratoconus. Corneas with a minimum stromal thickness <375μm were excluded. Riboflavin 0.1% soak duration was 10minutes. High-fluence pulsed UVA was delivered at 30 mW/cm
for 4minutes, with a 1.5-second on/off cycle (total energy 7.2 J/cm
). Subjective refractive, corneal tomography, and specular microscopy were performed at baseline, 6, 12, and 24months postoperatively. The primary outcome measure was a change in maximum keratometry (Kmax) at 24months.
Twelve- and 24-month follow-up data were available on 543 and 213 patients, respectively (mean age 25.4 ± 6.6 years). In mild cones (Kmax < 55 diopter [D]), mean keratometry remained unchanged at 24months. In more advanced disease, we observed modest corneal flattening compared to baseline (Kmax 63.2 ± 6.5 D vs 61.9 ± 8.1 D, P= .02), but no significant changes in central keratometry (K1 or K2). Keratometric stabilization was confirmed in 98.3% of eyes. Mean CDVA, manifest refraction and endothelial cell density did not change. Overall, 2.7% of eyes lost more than 2 lines of CDVA.
Accelerated pulsed CXL is a safe, effective, and refractively neutral intervention (at 2 years) to halt disease progression in keratoconus.
Accelerated pulsed CXL is a safe, effective, and refractively neutral intervention (at 2 years) to halt disease progression in keratoconus.
To study the outcomes of cultivated oral mucosal epithelial transplantation (COMET) in eyes with chronic Stevens-Johnson syndrome (SJS) sequelae.
Prospective interventional case series.
Forty-five eyes of 41 patients with chronic SJS sequelae were recruited and evaluated from 2013 to 2017 in an institutional setting. All patients underwent COMET, with an aim of fornix reconstruction and visual rehabilitation. Change in corrected distance visual acuity (CDVA), severity scores of various ocular surface parameters, and the occurrence of complications were documented during a follow up period of 2 years. Attainment and maintenance of a stable ocular surface, as assessed by change in the ocular surface severity scores was the primary outcome measure, while change in CDVA was the secondary outcome measure.
The mean preoperative CDVA was 2.7± 0.5 logMAR, which improved to 1.5± 0.7 logMAR and 1.49± 0.98 postoperatively, at 1- and 2-year follow-up visit. Overall, 82.2% eyes (37/45) had improvement in visual acuity, 13.3% (6/45) experienced no change, whereas 2 eyes (4.4%) had worsening of visual acuity. The total ocular surface severity scores improved from a mean preoperative value of 29.1± 9.7 to 18.7± 7.2 postoperatively, at 2-year follow-up. Two eyes developed persistent epithelial defects, with progression to corneal melting requiring keratoplasty.
COMET allows successful and sustained restoration of ocular surface anatomy with functional improvement, in eyes with chronic sequelae of SJS.
COMET allows successful and sustained restoration of ocular surface anatomy with functional improvement, in eyes with chronic sequelae of SJS.Combining the diverse chemical functionality of proteins with the predictable structural assembly of nucleic acids has enabled the creation of hybrid nanostructures for a range of biotechnology applications. Through the attachment of proteins onto or within nucleic acid nanostructures, materials with dynamic capabilities can be created that include switchable enzyme activity, targeted drug delivery, and multienzyme cascades for biocatalysis. Investigations of difficult-to-study biological mechanisms have also been aided by using DNA-protein assemblies that mimic natural processes in a controllable manner. Furthermore, advances that enable the recombinant production and intracellular assembly of hybrid nanostructures have the potential to overcome the significant manufacturing cost that has limited the use of DNA and RNA nanotechnology.Burkholderia, a bacterial genus comprising more than 120 species, is typically reported to inhabit soil and water environments. These Gram-negative bacteria harbor a variety of aromatic catabolic pathways and are thus potential organisms for bioremediation of sites contaminated with aromatic pollutants. However, there are still substantial gaps in our knowledge of these catabolic processes that must be filled before these pathways and organisms can be harnessed for biotechnological applications. This review presents recent discoveries on the catabolism of monoaromatic and polycyclic aromatic hydrocarbons, as well as of heterocyclic compounds, by a diversity of Burkholderia strains. We also present a perspective on the beneficial features of Burkholderia spp. and future directions for their potential utilization in the bioremediation and bioconversion of aromatic compounds.