A Case Report of Acute Transverse Myelitis Following Novel Coronavirus Infection

Introduction: During the coronavirus disease 2019 (COVID-19) pandemic, emergency providers are not only seeing an increasing number of patients with COVID-19 infections, but also associated complications and sequelae of this viral illness.Case Report: We present the case of a 28-year-old female patient who presented after a confirmed COVID-19 infection with lower back pain, bilateral symmetric upper and lower extremity numbness, and urinary retention. The patient was diagnosed with acute transverse myelitis. She required intravenous corticosteroids and plasma exchange with significant improvement in symptoms and minimal residual effects.Conclusion: This case illustrates the importance of prompt recognition and treatment of sequelae of COVID-19 infections

Analisi sperimentale degli ioni metallici presenti nella saliva di soggetti portatori di apparecchi ortodontici mobili

Fino a pochi decenni addietro, il fenomeno dell’esposizione a basse concentrazioni di agenti tossici era considerato soltanto un problema di igiene ambientale. In realtà vari studi1-5 hanno approfondito, grazie al monitoraggio biologico, il concetto di “esposizione a basse dosi” di agenti tossici o elementi in tracce: pertanto nei suddetti studi, gli autori concludono che le “basse dosi” corrispondono a una esposizione tale che le concentrazioni della sostanza in esame si mantengono, nei fluidi biologici (per la popolazione esposta), al di sopra dei valori massimi di riferimento (stabiliti per la popolazione generale) e al di sotto dei valori-limite biologici

A study of Ni-based refractory alloys via anomalous scattering techniques

Anomalous x-ray scattering methods provided means to probe the local interactions of specific chemical pairs in a Ni–Nb–Sn sequence. Data near and far from the absorption edges of individual constituent atoms were obtained to calculate differential distribution functions, revealing the atomic arrangements. The compositional fluctuations throughout a typical Ni60Nb40−xSnyNi60Nb40−xSny sample is described as alternating Ni-rich and Nb-rich clusters of ∼ 25 Å∼25Å dimensions. This nonrandom distribution of atomic species may partially explain the failure of previous modeling efforts of bulk metallic glasses to explain their mechanical behavior and thermal stability.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87755/2/074906_1.pd

A novel identification procedure from ambient vibration data for buildings of the cultural heritage

Ambient modal identification, also known as Operational Modal Analysis (OMA), aims to identify the modal properties of a structure based on vibration data collected when the structure is under its operating conditions, i.e., no initial excitation or known artificial excitation. This procedure for testing and/or monitoring historic buildings, is particularly attractive for civil engineers concerned with the safety of complex historic structures. However, since the external force is not recorded, the identification methods have to be more sophisticated and based on stochastic mechanics. In this context, this contribution will introduce an innovative ambient identification method based on applying the Hilbert Transform, to obtain the analytical representation of the system response in terms of the correlation function. In particular, it is worth stressing that the analytical signal is a complex representation of a time domain signal: the real part is the time domain signal itself, while the imaginary part is its Hilbert transform. A 3DOF numerical example will be presented to show the accuracy of the proposed procedure, and comparisons with data from other methods assess the reliability of the approach

ANTERIOR OPEN BITE TREATED WITH E F APPLIANCE: A CASE REPORT

Aim. Current trends in pediatric orthodontics aim to identify incorrect development of occlusion and medium/lower facial third as early as possible. Functional appliances are a popular type of device used for treating malocclusion in patients who are growing. Among the functional orthodontic devices intended for this purpose, \u201cEducation Functional\u201d is highlighted. It was developed by Dr. Daniel Rollet. In fact, in the occlusal alterations, early preventive treatment with elastodontic devices resulted in avoiding dysfunctional forces from acting on the skeletal pattern, thus reaching a balance between bone basis and muscular components. This report describes a clinical case of a patient (9-year-old female) with anterior open bite associated to oral dysfunction, treated, in the mixed dentition, with EF-line appliance. Our purpose is to evaluate the effectiveness of this device for the correction of the dysmorphoses

Mappe di Lavorabilita\u2019 per Giunti Misti di Alluminio Mediante Processo di Saldatura Linear Friction Welding

Il Linear Friction Welding \ue8 un processo di saldatura allo stato solido in cui una parte fissa \ue8 forzata contro una parte che si muove con moto lineare alternato per generare calore attraverso l\u2019attrito. Nel presente lavoro viene descritto lo studio effettuato per la realizzazione della giunzione mista mediante processo di Linear Friction Welding tra due leghe di alluminio che presentano propriet\ue0 meccaniche differenti, come la lega AA2011 e AA6082. Lo studio \ue8 stato condotto analizzando due differenti configurazioni determinate dalla posizione relativa delle leghe costituenti i provini da saldare. Per la realizzazione del processo \ue8 stata utilizzata una macchina prototipale dotata di sensori atti alla misura \u201cin process\u201d di variabili fondamentali per la completa comprensione del processo quali temperature nei provini, forze sui provini, accelerazioni e velocit\ue0 che questi subiscono

El cultivo de alpiste (Phalaris canariensis L.)

El alpiste es una gramínea anual, que se cultiva extensivamente en las regiones templadas del mundo para la obtención de sus granos. Es una especie de estación fría, cuyas prácticas de producción, requerimientos y ciclo de cultivo, se asemejan a los de otros cereales invernales como el trigo y la cebada. Históricamente los granos de alpiste han sido utilizados, casi con exclusividad, en la alimentación de aves ornamentales. Sin embargo, estudios recientes han propuestos otros usos alternativos como la alimentación de animales de cría y la elaboración de alimentos ―libres de gluten‖ para humanos. Nuestro país cuenta con una larga historia en la producción y comercialización de alpiste, habiendo sido hasta la década de los ochenta su principal productor. En la actualidad se encuentra entre los tres más importantes, siendo Canadá líder indiscutido. En la Argentina, el cultivo de alpiste se realiza, principalmente, en la regiones centro y sur este de la provincia de Buenos Aires, áreas de influencia de las Facultades de Agronomía del Centro de la Provincia de Buenos Aires y Ciencias Agrarias de la Universidad de Mar del Plata. Ambas instituciones cuentan con grupos de investigación que llevan más de una década generando conocimientos sobre el cultivo de alpiste, sus prácticas de producción, fisiología y mejoramiento genético. Quien, por necesidad o curiosidad, se haya interesado en el estudio de esta especie, habrá evidenciado la escasez de información disponible. Asimismo, habrá observado que gran parte de la información confiable circula a través de publicaciones científicas que en ocasiones son de difícil acceso. El propósito de este libro es poner a disposición de sus lectores los conocimientos actualizados sobre el alpiste, en el ámbito nacional e internacional, cubriendo aspectos que van desde la taxonomía hasta su comercialización. La obra está destinada a estudiantes, profesionales e investigadores de la agronomía y disciplinas afines. Sin embargo, algunos capítulos, como los que tratan sobre los requerimientos y el manejo del cultivo, han sido escritos con terminología accesible, debido a que contienen información de utilidad para los productores. Cabe destacar que en la redacción de la obra han participado docentes e investigadores de diferentes ramas de la agronomía, estudiado el cultivo desde sus diversas perspectivas disciplinares

Formation, Growth, and Decay of Sea-Ice in the Canadian Arctic Archipelago

Equations relating the accretion and decay of sea ice to standard meteorological data are derived empirically from observations at Alert, Eureka, Isachsen, Mould Bay, and Resolute, 1947-1957. The differential equations permit calculation of ice growth by increments, and contain a separate term allowing for variations in snow-cover depths. The use of the formulas requires only a knowledge of air temperatures and snow depths. Good correlation is found between decrease in ice thickness and accumulated degree-days above -1.8°C. The stations' locations and names of adjacent water bodies are indicated with the approximate water depths where ice thickness measurements were made. Techniques used in the measurements are described; data on observed ice thickness, accumulated degree-days of frost, and average snow depths for 20-cm increments of ice growth are tabulated.--From CRREL

Cellulose acetate phthalate, a common pharmaceutical excipient, inactivates HIV-1 and blocks the coreceptor binding site on the virus envelope glycoprotein gp120

BACKGROUND: Cellulose acetate phthalate (CAP), a pharmaceutical excipient used for enteric film coating of capsules and tablets, was shown to inhibit infection by the human immunodeficiency virus type 1 (HIV-1) and several herpesviruses. CAP formulations inactivated HIV-1, herpesvirus types 1 (HSV-1) and 2 (HSV-2) and the major nonviral sexually transmitted disease (STD) pathogens and were effective in animal models for vaginal infection by HSV-2 and simian immunodeficiency virus. METHODS: Enzyme-linked immunoassays and flow cytometry were used to demonstrate CAP binding to HIV-1 and to define the binding site on the virus envelope. RESULTS: 1) CAP binds to HIV-1 virus particles and to the envelope glycoprotein gp120; 2) this leads to blockade of the gp120 V3 loop and other gp120 sites resulting in diminished reactivity with HIV-1 coreceptors CXCR4 and CCR5; 3) CAP binding to HIV-1 virions impairs their infectivity; 4) these findings apply to both HIV-1 IIIB, an X4 virus, and HIV-1 BaL, an R5 virus. CONCLUSIONS: These results provide support for consideration of CAP as a topical microbicide of choice for prevention of STDs, including HIV-1 infection