Search results for "Tact"
showing 10 items of 1313 documents
Segregation in Drying Binary Colloidal Droplets
2019
When a colloidal suspension droplet evaporates from a solid surface, it leaves a characteristic deposit in the contact region. These deposits are common and important for many applications in printing, coating, or washing. By the use of superamphiphobic surfaces as a substrate, the contact area can be reduced so that evaporation is almost radially symmetric. While drying, the droplets maintain a nearly perfect spherical shape. Here, we exploit this phenomenon to fabricate supraparticles from bidisperse colloidal aqueous suspensions. The supraparticles have a core-shell morphology. The outer region is predominantly occupied by small colloids, forming a close-packed crystalline structure. Tow…
Highly Syndiotactic or Isotactic Polyhydroxyalkanoates by Ligand-Controlled Yttrium-Catalyzed Stereoselective Ring-Opening Polymerization of Function…
2017
International audience; Reported herein is the first stereoselective controlled ROP of a specific family of racemic functional β-lactones, namely 4-alkoxymethylene-β-propiolactones (BPL(OR) s). This process is catalyzed by an yttrium complex stabilized by a nonchiral tetradentate amino alkoxy bisphenolate ligand _ONOO(R'2) ₍2-) , which features both a good activity and a high degree of control over the molar masses of the resulting functional poly(3-hydroxyalkanoate)s. A simple modification of the R' substituents in ortho and para position on the ligand platform allows for a complete reversal from virtually pure syndioselectivity (Ps up to 0.91 with R'=cumyl) to very high isoselectivity (Pi…
Aligned microcontact printing of biomolecules on microelectronic device surfaces
2001
Microcontact printing (/spl mu/CP) of extracellular matrix proteins is a fascinating approach to control cell positioning and outgrowth, which is essential in the development of applications ranging from cellular biosensors to tissue engineering. Microelectronic devices can be used to detect the activity from a large number of recording sites over the long term. However, signals from cells can only be recorded at small sensitive spots. Here, the authors present an innovative setup to perform aligned /spl mu/CP of extracellular matrix proteins on microelectronic devices in order to guide the growth of electrogenic cells specifically to these sensitive spots. The authors' system is based on t…
Znaczenie rodziny w życiu skazanych poszkodowanych - opinie, oceny i potrzeby
2020
The questions addressed in the present paper concern the family relations of persons deprived of freedom who – remaining in the prison environment – have been degraded, that is convicts occupying the lowest rung in the informal penitentiary system, so-called victimized prisoners. They make a specific community, rejected and humiliated by other inmates. The necessity to ensure safety to them and help them protect their personal characteristics generates difficulties in activities of rehabilitative character. The aim of the research was to show the family relations of people degraded in the prison environment – a subject that has not been studied to date. The method of diagnostic survey was u…
Documenting Italo-Romance minority languages in the Americas. Problems and tentative solutions
2021
This article describes the process of preparation and implementation of a data collection enterprise targeting Italo-Romance emigrant languages in North and South America. This data collection is part of the ERC Microcontact project, which aims to understand language change in contact by examining the language of Italian communities in the Americas.
Ahromatopsijas izpausmju korekcija ar krāsainām kontaktlēcām
2017
MĒRĶIS: Novērtēt filtru kontaktlēcu (KL) pielietojumu ahromatopsijas simptomu korekcijai. METODE: Pētījumā piedalījās 8 dalībnieki (6 sievietes un 2 vīrieši) vecumā no 8 mēnešiem līdz 25 gadiem, periodā no 2012. līdz 2016.gadam. Pēc oftalmoloģiskās pārbaudes un ahromatopsijas noteikšanas, tika veikta speciālās krāsainās KL pielaikošanas procedūra. Pacientu atbildes tika noteiktas ar anketas palīdzību un noteikts apžilbšanas laiks ar un bez piedāvātām KL. SECINĀJUMI: filtru KL samazināja fotofobiju; apžilbšanas laiks kļuvis salīdzināms ar normālā redzes gadījumu; dalībnieki atzinīgi novērtē psiholoģiskos un sociālos ieguvumus ar izrakstītām filtru KL.
Comparison between Focused Electron/Ion Beam-Induced Deposition at Room Temperature and under Cryogenic Conditions
2019
This article belongs to the Special Issue Multi-Dimensional Direct-Write Nanofabrication.
Enhancement of structural, functional and antioxidant properties of fish gelatin films using Maillard reactions
2018
International audience; This study investigates the effect of Maillard reactions (MR) on the physico-chemical and biological properties of fish gelatin based edible films. Glucose was incorporated in gelatin film forming solutions at different glucose/lysine molar ratios: 0.5/1.0, 1.0/1.0 and 5.0/1.0. The MR was then induced by heating films at 90 °C for 24 h in dry conditions. Color changes and browning index measurements were used to pursue the MR kinetic. Results showed that the development of MR products was dependent on the glucose content and on the reaction time. Mechanical and thermal properties of treated films displayed an increase in tensile strength, elongation at break and glas…
Understanding the Effects of Crosslinking and Reinforcement Agents on the Performance and Durability of Biopolymer Films for Cultural Heritage Protec…
2021
In the last two decades, the naturally occurring polysaccharides, such as chitosan and pectin, have gained great attention having potential applications in different sectors, from biomedical to new generation packaging. Currently, the chitosan and pectic have been proposed as suitable materials also for the formulation of films and coatings for cultural heritage protection, as well as packaging films. Therefore, the formulation of biopolymer films, considering only naturally occurring polymers and additives, is a current challenging trend. This work reports on the formulation of chitosan (CS), pectin (PC), and chitosan:pectin (CS:PC) films, also containing natural crosslinking and reinforce…