Search results for "bone"

Tailoring the excitation of fundamental flexural guide waves in coated bone by phase-delayed array: Two-dimensional simulations

2015

The fundamental flexural guided wave (FFGW) enables ultrasonic assessment of cortical bone thickness. In vivo, it is challenging to detect this mode, as its power ratio with respect to disturbing ultrasound is reduced by soft tissue covering the bone. A phase-delayed ultrasound source is proposed to tailor the FFGW excitation in order to improve its power ratio. This situation is analyzed by 2D finite-element simulations. The soft tissue coating (7-mm thick) was simulated as a fluid covering an elastic plate (bone, 2–6 mm thick). A six-element array of emitters on top of the coating was excited by 50-kHz tone bursts so that each emitter was appropriately delayed from the previous one. Respo…

Reconstruction of human subsistence and husbandry strategies from the Iberian Early Neolithic: A stable isotope approach

2018

Objectives The Early Neolithic involved an important social and economic shift that can be tested not only with the material culture, but also through biomolecular approaches. The Iberian Peninsula presents few Early Neolithic sites where fauna and humans can be analyzed together from an isotopic perspective. Here we present an isotopic study on the site of Cueva de Chaves as an example for understanding the dietary and economical changes that took place during Early Neolithic in Iberia. Material and methods Here we apply carbon and nitrogen stable isotope analysis to bone collagen from 4 humans and 64 faunal samples from 14 different species. The large dataset belongs to the same unique ch…

Distinguishing between Bos and Bison petrous bones. A case study: Bovines from the des-cubierta cave (Pinilla del Valle, Madrid)

2019

This research has been supported by the financial assistance of the Spanish Society of Palaeontology ID AJISEP-2017-07142. M.A. Galindo-Pellicena was also being supported by a postdoctoral grant from the Fundacion Atapuerca. We thank the Excavation Team of the Des-Cubierta cave for their work in the fi eld, and our colleagues from the Centro Mixto UCM-ISCIII of Madrid and from the Regional Archaeological Museum of Alcalá de Henares, especially to Belén Márquez, Elena Santos, Beatrice Vacca and Abel Moclánfor their suggestions during the elaboration of the manuscript. Thanks must be extended to the Restoration Team, especially to M. Cruz Ortega, to the photographers Alfonso Dávila and Mario …

<strong><em>Chilocoris laevicollis</em> Horváth, 1919, and<em> Ch. umbricola</em> Linnavuori, 1993—two trogloxenic burr…

2016

First country records of two burrower bugs, Chilocoris laevicollis , and Ch . umbricola (Hemiptera: Heteroptera: Cydnidae) from Gabon (Central Africa) are presented. The study was based on the specimens collected by Dr. V. Aellen, a well-known Swiss speleologist, taken from two caves near Lastoursville in the Gabonese Republic. Diagnostic characters for both recorded species are provided, and data on their biology and distribution are summarized.

‘Due glosse di origine germanica nel ms. Paris, Bibliothèque Nationale lat. 13833’

1986

‘The Third Book of the Bella Parisiacae Urbis by Abbo of Saint-Germain-des-Prés and its Old English Gloss’

1986

Glossing Abbo in Latin and the Vernacular

2011

Il saggio prende in esame i due apparati che accompagnano il Libro III dei Bella Parisiacae urbis di Abbone di San Germano. Per quanto riguarda le glosse in latino che corredano il testo di Abbone in tutti i mss., queste si possono ricondurre a glossari come il Liber glossarum e gli Scholica graecarum glossarum, ma anche ad altri glossari come Abolita, Abstrusa e pseudo-Filosseno. Le glosse in anglosassone alla versione in prosa del testo latino elaborata in Inghilterra nel X secolo sono invece originali e si devono a un autore che mira prevalementemente a fare comprendere e memorizzare i numerosi vocaboli, spesso di rara occorrenza (tra cui figurano molti prestiti dal greco, neologismi e a…

The bone marrow stroma in hematological neoplasms-a guilty bystander.

2011

In the setting of hematological neoplasms, changes in the bone marrow (BM) stroma might arise from pressure exerted by the neoplastic clone in shaping a supportive microenvironment, or from chronic perturbation of the BM homeostasis. Under such conditions, alterations in the composition of the BM stroma can be profound, and could emerge as relevant prognostic factors. In this Review, we delineate the multifaceted contribution of the BM stroma to the pathobiology of several hematological neoplasms, and discuss the impact of stromal modifications on the natural course of these diseases. Specifically, we highlight the involvement of BM stromal components in lymphoid and myeloid malignancies, a…

Protein Adsorption Hysteresis and Transient States of Fibrinogen and BMP-2 as Model Mechanisms for Proteome-Binding to Implants

2020

Abstract Protein adsorption studies returned to the focus of medical therapeutics, when it was found that up to 2500 non-plasma proteins adsorbed to hip implants during arthroplastic surgery, challenging peri-implant healing models. Questions have re-emerged as to the implications of uncontrolled protein unfolding after adsorption. In past studies on the cooperativity of protein binding we discovered protein adsorption hysteresis, a thermodynamically irreversible process. The present precursory study comprises real-time kinetic (TIRF-Rheometry) and equilibrium (125I-tracer ) studies on the hysteretic binding of fibrinogen and rhBMP-2 to titanium and glass surfaces via transient states. Ther…

Źródła archeologiczne z cmentarzysk jako narzędzie badawcze do poznania stanu zdrowia ludzi okresu średniowiecza, na podstawie stanowiska nr 1 w Bycz…

2019

Research on early medieval and medieval archaeoiogical and anthropological cemeteries is not the easiest. Archaeoiogical and anthropological research in Byczyna showed how valuable e data from cemetery research is, how much we can leam about the community living in medieval cities. Analyzing bone material at the preliminary stage of research, it can beseen that the health condition of the inhabitants of medieval Byczyna was not good. Almost half of the examined skeletons have traces of various diseases, especially degenerative diseases and injuries. There were also cases of conditions that indicate that the diet of the dead did not have basie nutrients.