The need of innovative, multifunctional biomaterials for the partial or complete tissue replacement is the driving force for the search of improvements of the performances of the available materials and in the formulation of new ones. Addressing the focus to vitreous substitution, we have explored the possibility of using injectable aqueous solutions of poly(vinyl alcohol), PVA, derivatives abl...

One of the most dramatic causes of damage of structures during earthquakes has been the development of liquefaction in saturated cohesionless deposits. These deposits have tendency to densify when subjected to earthquake loading. However, when saturated, the tendency to densify causes the excess pore water pressure to increase. This, in turn, results in the effective stress of soil to decrease....

Hydrothermal liquefaction of algae biomass is a promising technology for the production of sustainable biofuels, but the non-oil, aqueous co-product of the process has only been examined to a limited extent. The aqueous phase from liquefaction of the alga Nannochloropsis oculata (AqAl) was used to make growth media for model heterotrophic microorganisms Escherichia coli, Pseudomonas putida, and...

Catalytic liquefaction of (Municipal sewage sludge) MSS over transition metal catalysts in ethanol-water co-solvent (EWCS) was investigated. The effect of operating parameters like temperature, holding time, and ethanol-water ratio was discussed. CuSO4 was selected as the most efficient catalyst. The highest biocrude yield (47.45%) and liquefaction conversion (97.74%) was both obtained at the s...

Optic nerve avulsion is a rare, but devastating complication. In this condition, the optic nerve is forcibly disinserted from the retina, choroid, and vitreous, and the lamina cribrosa is retracted from the scleral rim. If the media are clear, the avulsion is easily diagnosed. The appearance of the fundus is striking, with a hole or cavity where the optic disc has retracted into its dural sheat...

DOI: 10.1590/S1679-45082015AI2979 NRS, a woman, 71-year-old, who born in São Paulo, Brazil, sought our care service complaining of progressive low visual and metamorphopsia in the right eyes (RE) for 3 months. She had no-history of comorbidities, ophthalmologic surgeries or eye diseases. Upon examination her best-corrected visual acuity was 20/80 in the RE and 20/20 in the left eye. Funduscopy ...

Herein we present the spectral-domain optical coherence tomographic (SD-OCT, Heidelberg Spectralis; Heidelberg Engineering, Heidelberg, Germany) image of an 80-year-old male patient with partial posterior vitreous detachment (PVD). Tractional forces from the vitreous body pull retinal layers by means of vitreoretinal adhesions.1,2 This high-resolution SD-OCT image illustrates how traction eleva...

during the last years the total cost of lng technology has decreased significantly due to improvements of the liquefaction process. however, many liquefaction plants that are still in operation use a three-cascade refrigeration system. in this paper, an advanced exergetic analysis is applied to better understand the operation of a three-cascade refrigeration system for liquefaction of natural g...

due to its critical impact and significant destructive nature during and after seismic events, soil liquefaction and liquefactioninduced lateral ground spreading have been increasingly important topics in the geotechnical earthquake engineering field during the past four decades. the aim of this research is to develop an empirical model for the assessment of liquefaction-induced lateral ground ...

We report on a 7-month-old boy who suffered from retinoblastoma with presentation of a white pupillary reflex in his right eye. Initial examination showed a large subretinal and intraretinal mass nasally with extensive vitreous seeding of tumor cells (Group Vb in the Reese-Ellsworth classification). External beam radiation therapy (EBRT) was applied in hopes of preserving the eye, and significa...