Search results for "CONTACT"
showing 10 items of 1003 documents
EFFECT OF ULTRASOUND TREATMENT ON PROPERTIES OF GLUTEN-BASED FILM
2010
Abstract Gluten films obtained in acid conditions display some protein dispersion difficulties. Ultrasound treatment (UT) could represent an interesting strategy for improving gluten film appearance. Different UT exposure times were applied to film-forming dispersion. The aim of this work was to investigate the effect of ultrasound treatment on gluten-based films at molecular and mesoscopic levels. Distribution in gliadin and glutenins was determined with SE-HPLC. The UT improved protein dispersion and final film appearance. Sonication did not lead to large changes in various gluten fractions, which suggests absence of important protein breakdown at the molecular level. Gluten showed high t…
Wood coated with plasma-polymer for water repellence
2008
The effects of cold HMDSO and HMDSO + SF6 plasma treatments on spruce, chestnut and poplar wood were investigated in order to obtain a hydrophobic surface evaluated by microscopic, spectroscopic (FT-IR and LIBS) and contact angle analyses. Cold plasma treatments can increase the surface hydro-repellence without modifying the external aspect and bulk properties of different woods.
Indium Selenide Solar Cells
1981
Indium selenide photovoltaic devices are described. Transport and photovoltaic properties are discussed. Efficiencies of 6% are reported and ways of improvement are proposed.
Electrochemical Characterization of Corrosion Products in Leaded Bronze Sculptures Considering Ohmic Drop Effects on Tafel Analysis
2015
[EN] The characterization of corrosion products in leaded bronze based on the voltammetry of immobilized particles methodology is described. Voltammetric data, supported by Fourier transform infra-red spectroscopy, field emission scanning electron microscopy-energy dispersive X-ray microanalysis (FESEM-EDX) and scanning electrochemical microscopy (SECM) allow the identification of copper and lead corrosion materials. The mutual influence of such products is modeled upon considering uncompensated ohmic drops in the Tafel analysis of the rising portion of the respective voltammetric signals for their electrochemical reduction.
Il ruolo del contatto tra varietà tedesche e romanze nella costruzione «verbo più locativo»
2016
In this article we examine some effects of language contact in the multilingual province of Trento, where Romance and Germanic varieties have been in contact for centuries. We focus on the syntax of phrasal verbs (e. g. ‘go out’, ‘get away’) in Trentin, a Romance dialect group, in Fassan, a Rhaeto-romance variety, and in Cimbrian, a German(ic) minority language. In particular, we deal with two word order phenomena which might be attributed to contact with the more prestigious or widespread varieties spoken in the area: (i) in some Fassan phrasal verbs we find the order «Verb – XP – Locative element», which resembles the German order; (ii) in Cimbrian various syntactic positions are possible…
Have tractor manufacturers bore in mind soil compaction over the last 40 years?
2019
Soil compaction is the compression of soil particles in a lower volume as a consequence of the reduction of the spaces existing among the particles themselves. This phenomenon is caused by natural forces and, above all, human ones. In order to estimate the field damages that can be caused by the traffic of agricultural machines, the load and the mean pressure applied by the tyres onto the soil can be measured. The research aim is to determine the pressure applied by each considered tractor onto the soil, in order to evaluate the effect of the traffic of tractors onto the soil itself. A total of 783 wheeled tractors manufactured and marketed in the last 35 years (1979-2014) was investigated.…
TECHNOLOGICAL PERSPECTIVES REGARDING THE APPLICATION OF THE CONTACT BREAKING ELECTRICAL DISCHARGE MACHINING PROCESS USING AS ELECTRODE-TOOL - METAL B…
2020
The scientific paper presents the most important aspects of theoretical and practical nature regarding the possibilities of processing metallic materials using the contact breaking electrical discharge machining with transfer object-metal band. The exposed research is based on the experience gained over the years by a team of Romanian researchers and university professors who managed to patent a metal material cutting plant using the process of contact breaking electrical discharge machining with transfer object-metal band. The scientific paper presents a radiography of some studies and research carried out over the years in the previous field presented.
Contact formation in random networks of elongated objects
2014
The effect of steric hindrance is an important aspect of granular packings as it gives rise to, e.g., limitations on the densities of ordered and disordered packings, both of which are essentially defined by the geometry of the constituents. Here we focus on random packing of rods via deposition and their distributions of contact number and segment length. Such statistical properties are relevant for mechanical properties of the structures, but the (quite large) steric effects on them have not been addressed in previous studies. We therefore develop a theory that describes the statistical properties of rod packings, while taking into account that the deposited rods cannot overlap and thus i…
A TOPOLOGICAL STUDY OF PLANAR VECTOR FIELD SINGULARITIES A tribute to Ivar Bendixson
2019
In this paper one extends results of Bendixson [B] and Dumortier [D] about the germs of vector fields with an isolated singularity at the origin of IR 2 , not accumulated by periodic orbits. As new tool, one introduces minimal curves, which are curves surrounding the origin, with a minimal number of contact points with the vector field. Moreover, the arguments are essentially topological, with no use of a desingularization theory, as it is the case in [D]. 2000 Mathematics Subject Classification : 34C05, 34A26.
Ortokeratoloģijas ietekme uz ceturtās kārtas aberācijām.
2020
Maģistra darbs ir uzrakstīts angļu valodā uz 36 lapaspusēm. Tas satur 7 attēlus, 7 formulas, 7 tabulas, 3 grafikus un 38 literatūras atsauces. Darba mērķis bija novērtēt radzenes sagitālā augstuma un leņķa, kā arī ceturtās kārtas aberāciju izmaiņas pēc ortokeratoloģijas lēcu lietošanas. Pētījumā tika analizēti radzenes topogrāfijas dati, iegūti no 30 acīm, trīs mēnešus lietojot ortokeratoloģijas lēcas. Rezultāti neuzrādīja būtiskas izmaiņas ceturtās kārtas aberāciju lielumos. Modificējot ortokeratoloģijas lēcu parametrus, ir iespējams saglabāt labu redzes asumu un skotopisko redzi pēc ortokeratoloģijas lēcu lietošanas.