Severe loss of bone mass may require grafting, and, among the alternatives available, there are natural biomaterials that can act as scaffolds for the cell growth necessary for tissue regeneration. Collagen and elastin polymers are a good alternative due to their biomimetic properties of bone tissue, and their characteristics can be improved with the addition of polysaccharides such as chitosan and bioactive compounds such as jatoba resin and pomegranate extract due to their antigenic actions. The aim of this experimental protocol was to evaluate bone neoformation in experimentally made defects in the mandible of rats using polymeric scaffolds with plant extracts added.
View Article and Find Full Text PDFInt J Mol Sci
October 2023
Bone lesions have the capacity for regeneration under normal conditions of the bone metabolism process. However, due to the increasing incidence of major traumas and diseases that cause bone-mineral deficiency, such as osteoporosis, scaffolds are needed that can assist in the bone regeneration process. Currently, natural polymeric scaffolds and bioactive nanoparticles stand out.
View Article and Find Full Text PDFCurrent classification systems use the terms "catatonia" and "psychomotor phenomena" as mere a-theoretical descriptors, forgetting about their theoretical embedment. This was the source of misunderstandings among clinicians and researchers of the European collaboration on movement and sensorimotor/psychomotor functioning in schizophrenia and other psychoses or ECSP. Here, we review the different perspectives, their historical roots and highlight discrepancies.
View Article and Find Full Text PDFIn this study scaffolds of nanohydroxyapatite (nHA) and anionic collagen (C) combined with plant extracts intended for bone tissue repair were developed. Grape seed (P), pomegranate peel (R) and jabuticaba peel (J) extracts were used as collagen crosslinker agents in order to improve the materials properties. All crude extracts were effective against Staphylococcus aureus, but only for CR scaffold inhibition zone was noticed.
View Article and Find Full Text PDFDeformability and internal ordering are key features related to cell function, particularly critical for cells that routinely undergo large deformations, like T cells during extravasation and migration. In the measurement of cell deformability, a considerable variability is typically obtained, masking the identification of possible interrelationships between deformability, internal ordering and cell function. We report the development of a single-cell methodology that combines measurements of living-cell deformability, using micropipette aspiration, and three-dimensional confocal analysis of the nucleus and cytoskeleton.
View Article and Find Full Text PDFEnviron Monit Assess
November 2018
Agricultural systems have experienced rapid expansion and intensification in the last several decades. In Uruguay, since the beginning of 2000, the most common cropping systems have included soybeans. Currently, this crop is expanding towards lowlands traditionally occupied by rice in rotation with pastures.
View Article and Find Full Text PDFThe detection of no-model input-output (IO) pairs is important because it can speed up the multivariable system identification process, since all the pairs with null transfer functions are previously discarded and it can also improve the identified model quality, thus improving the performance of model based controllers. In the available literature, the methods focus just on the open-loop case, since in this case there is not the effect of the controller forcing the main diagonal in the transfer matrix to one and all the other terms to zero. In this paper, a modification of a previous method able to detect no-model IO pairs in open-loop systems is presented, but adapted to perform this duty in closed-loop systems.
View Article and Find Full Text PDFPurpose: To report the clinical outcomes of local treatment of toxoplasmic retinochoroiditis (TRC) with intravitreal injections of clindamycin and dexamethasone.
Study Population: 16 eyes (16 patients) with active TRC sparing the macula and juxtapapillary area treated with intravitreal injections of clindamycin (1 mg) and dexamethasone (1 mg) without concomitant systemic antitoxoplasmic or anti-inflammatory therapy. Measured parameters: Best-corrected visual acuity (BCVA) was measured by an Early Treatment Diabetic Retinopathy Study (ETDRS) chart.
Patients with inherited bleeding disorders are rare in obstetric practice but present with prolonged bleeding even after minor invasive procedures. They require a combined approach with obstetric and hematological management of each case, including the neonatal management of a possibly affected fetus. We present the case of a pregnancy in a patient with combined Factor VII deficiency and Glanzmann's thrombasthenia, the successful obstetric and hematological management of the case, and a review of the literature.
View Article and Find Full Text PDFA method is proposed to detect if there is no coupling between an input and an output in systems operating in open-loop, that is, without a supervisory controller. The proposed technique is applicable to multiple input multiple output (MIMO) systems, whose intent is to detect no-model input/output (IO) combinations in a transfer matrix. Traditional approaches for selecting IO pairs are usually performed after the plant model is identified.
View Article and Find Full Text PDFThe development of a simulator for a packing and weighing system (PWS) of granulated powder is described. It employed system identification to obtain the deterministic part of the model and stochastic processes to reproduce disturbances. It reproduces the fluctuations in carton weight observed in real packing systems.
View Article and Find Full Text PDFPurpose: To evaluate anatomical and functional results of 25-gauge transconjunctival sutureless pars plana vitrectomy in patients with uveitis.
Methods: Vitrectomy was performed on 20 eyes with residual vitritis secondary to infectious and noninfectious uveitis. Patients were evaluated 1 week before surgery and after surgery at day 1, week 1, week 4 and week 12.
Purpose: Uveitis is a major visual impairment disease affecting parts or the entire uveal tract and occasionally the sclera, the cornea or the optic nerve. The disease is a major cause of ocular morbidity and blindness in immunocompetent and immunocompromised patients. In this work we analyzed the sensitivity and specificity of real-time PCR to detect the etiological agent from blood, plasma, vitreous and aqueous humor and compared with the diagnostic hypothesis.
View Article and Find Full Text PDFPurpose: To evaluate the spatial association between visual field (VF) sensitivity loss and retinal nerve fiber layer (RNFL) thinning in patients infected by the human immunodeficiency virus.
Methods: Fifty-one eyes of 51 human immunodeficiency virus-infected patients and 22 eyes of 22 control subjects were enrolled. Patients were evaluated using the Fast RNFL scan strategy on Stratus OCT and the 24-2 full-threshold program on the Humphrey Matrix frequency doubling technology (FDT) perimeter.
Purpose: To report fundus autofluorescence (FA) and spectral domain optical coherence tomography (SDOCT) findings in serpiginous choroiditis.
Design: Case report.
Methods: SDOCT and FA imaging of a 37-year-old woman with bilateral recurrent serpiginous choroiditis.
Two simple and straightforward sample preparation methods were developed for the multiresidue analysis of post-emergence herbicides in loam soil that are commonly used in rice crop cultivation. A number of strategic soil extraction and cleanup methods were evaluated. The instrumental analysis was performed by HPLC with a diode array detector.
View Article and Find Full Text PDFPurpose: To describe the features and outcomes of patients with AIDS-related cytomegalovirus retinitis after highly active antiretroviral therapy availability.
Methods: Retrospective chart review of 30 consecutive patients (44 eyes) with AIDS and newly diagnosed, active AIDS-related cytomegalovirus retinitis, examined from January 2005 to December 2007.
Results: The mean age was 34.
Purpose: To assess retinal nerve fiber layer (RNFL) and macular thickness using optical coherence tomography (OCT) on HIV-infected patients without ocular manifestations and to correlate these findings with frequency-doubling technology perimetry (FDT).
Design: Cross-sectional study.
Methods: setting: Single center.
Purpose: To report spectral domain optical coherence tomography (OCT) and angiographic findings in exudative retinal detachment complicating central serous chorioretinopathy.
Design: interventional case report.
Methods: 33-year old man with bilateral nonrhegmatogenous retinal detachment, misdiagnosed as uveitis, iatrogenically treated with systemic corticosteroids.
This paper presents the design and implementation of an embedded soft sensor, i.e., a generic and autonomous hardware module, which can be applied to many complex plants, wherein a certain variable cannot be directly measured.
View Article and Find Full Text PDFPurpose: To investigate immune and viral contributions to the pathogenesis of immune recovery uveitis (IRU), which presents as vitritis, macular edema, or formation of epiretinal membranes, and develops in patients with acquired immunodeficiency syndrome (AIDS) who experienced cytomegalovirus (CMV) retinitis before antiretroviral treatment (ART) induced immune reconstitution.
Methods: Aqueous and vitreous fluids from patients with IRU, active CMV retinitis, and control human immunodeficiency virus (HIV)-negative, noninflamed eyes were compared for presence of cytokines IL-6, IL12, interferon gamma using enzyme-linked immunosorbent assay techniques, and CMV DNA (by polymerase chain reaction).
Results: IRU eyes (11 patients, 18 samples) had the highest levels of IL-12 (median 48 pg/mL), moderate levels of IL-6 (median 146 pg/mL), and low but significant interferon gamma (median 15 pg/mL), compared to controls (P < 0.
A new approach to natural gas flow computer design is presented in this paper. The developed system runs on a personal computer and employs the state-of-the-art mathematical models for corrections of some aspects of fluid flow dynamics, as well as for compressible behavior of gaseous fluid considerations. Orifice plates were used as primary elements.
View Article and Find Full Text PDFPurpose: To study the activity of the novel anti-angiogenic compound AG3340 (Prinomastat), a selective inhibitor of matrix metalloproteases, in an animal model of retinal neovascularization.
Methods: C57BL/6J mice were used to produce oxygen-induced retinal neovascularization. Mice were exposed to room air from birth (P0) to postnatal 7 days (P7) and to hyperoxia (75% oxygen) for the next 5 days.
This paper considers the design of a software sensor (or soft-sensor) for the on-line estimation of the biological activities of a colony of aerobic micro-organisms acting on activated sludge processes, where the carbonaceous waste degradation and nitrification processes are taken into account. These bioactivities are intimately related to the dissolved oxygen concentration. Two factors that affect the dynamics of the dissolved oxygen are the respiration rate or the oxygen uptake rate (OUR) and the oxygen transfer function (K(l)a).
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