Search results for "Raft"

Grafting of polymer chains on the surface of carbon nanotubes via nitroxide radical coupling reaction

2016

Poly(butylene succinate)/MWCNTs nanocomposites with improved dispersion and with nanotubes embedded/immobilized into the polymer matrix were here prepared by an alternative "grafting to" method based on thenitroxide radical coupling reaction. Poly(butylene succinate) (PBS) was grafted on the surface of TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy) modified multi-walled carbon nanotubes (MWCNTs) via a nitroxide radical coupling reaction. TEMPO functionalized MWCNTs (MWCNTs-g-TEMPO) were synthesized using the Cu(I)-catalyzed azide/alkyne click chemistry approach and the covalent bond of the nitroxide moieties onto the MWCNTs was confirmed via electron paramagnetic resonance (EPR) spectroscopy.…

Block copolymers from ionic liquids for the preparation of thin carbonaceous shells

2017

This paper describes the controlled radical polymerization of an ionic-liquid monomer by RAFT polymerization. This allows the control over the molecular weight of ionic liquid blocks in the range of 8000 and 22000 and of the block-copolymer synthesis. In this work we focus on block copolymers with an anchor block. They can be used to control the formation of TiO2 nanoparticles, which are functionalized thereafter with a block of ionic-liquid polymer. Pyrolysis of these polymer functionalized inorganic nanoparticles leads to TiO2 nanoparticles coated with a thin carbonaceous shell. Such materials may, e.g., be interesting as battery materials.

Pirmreizējas sirds ritma izmaiņas pacientiem pēc atvērtās sirds operācijas

2019

Pēcoperācijas ātriju fibrilācija (POĀF) ir biežākā komplikācija pacientiem, kuriem veikta operācija uz atvērtas sirds. Kā rezultātā tā ietekmē morbiditāti, mortalitāti, kā arī palielina finansiālas izmaksas. Pētījuma mērķis ir uzzināt vai ir korelācija starp veiktiem pirms operācijas standarta izmeklējuma rezultātiem un pēcoperācijas ātriju fibrilāciju. Jo nosakot augsta riska pacientu var uzsākt preventīvu ārstēšanu. Materiāli un metodes: retrospektīvs pētījums, kur tika iekļauti pacienti, kam veikta sirds operācija ar sternotomijas pieeju, kuriem pirms operācijas bija sīnusa ritms n = 111. 39 pacienti netika iekļauti pētījumā, jo pirms operācijas bija ātriju fibrilācija vai anamnēzē ātrij…

Trans -Cyclooctene-Functionalized PeptoBrushes with Improved Reaction Kinetics of the Tetrazine Ligation for Pretargeted Nuclear Imaging

2020

Tumor targeting using agents with slow pharmacokinetics represents a major challenge in nuclear imaging and targeted radionuclide therapy as they most often result in low imaging contrast and high radiation dose to healthy tissue. To address this challenge, we developed a polymer-based targeting agent that can be used for pretargeted imaging and thus separates tumor accumulation from the imaging step in time. The developed targeting agent is based on polypeptide-graft-polypeptoid polymers (PeptoBrushes) functionalized with trans-cyclooctene (TCO). The complementary In-111-labeled imaging agent is a 1,2,4,5-tetrazine derivative, which can react with aforementioned TCO-modified PeptoBrushes i…

"RESPONSABILITA'​ CIVILE E RAFTING AGONISTICO: IL RUOLO DEL CONTRATTO PER L’EFFETTUAZIONE DI UNA DISCESA FLUVIALE"

2016

Repeated kidney re-transplantation—the Eurotransplant experience: a retrospective multicenter outcome analysis

2020

Transplant international (2020). doi:10.1111/tri.13569

Clinical assessment and comparison of ACL reconstruction using synthetic graft (Neoligaments versus FiberTape).

2021

Background Due to the low potential for primary biological healing of the anterior cruciate ligament (ACL), the most popular approach is currently reconstruction using a graft. Recent research indicates that the technique of strengthening a damaged ligament with synthetic tapes (internal bracing) may be an alternative to reconstructive treatment, especially in cases of partial ACL damage. Objectives To compare and evaluate the possibility of using a synthetic graft (Neoligaments or FiberTape) to treat partial lesions of the ACL. Material and methods This was a retrospective cohort study. Selected from a pool of 128 patients undergoing primary unilateral intra-articular ACL reconstruction du…

The Car Resequencing Problem with Pull-Off Tables

2011

AbstractThe car sequencing problem determines sequences of different car models launched down a mixed- model assembly line. To avoid work overloads of workforce, car sequencing restricts the maximum occurrence of labor-intensive options, e.g., a sunroof, by applying sequencing rules. We consider this problem in a resequencing context, where a given number of buffers (denoted as pull-off tables) is available for rearranging a stirred sequence. The problem is formalized and suited solution procedures are developed. A lower bound and a dominance rule are introduced which both reduce the running time of our graph approach. Finally, a real-world resequencing setting is investigated.

Dexamethasone Dipropionate Loaded Nanoparticles Of -Elastin-G-Plga For Potential Treatment Of Restenosis

2013

Root hydraulic conductivity in three self-rooted and grafted table grape cultivars

2012

<p style="text-align: justify;"><strong>Aim</strong>: Root hydraulic conductivity is one of the main factors that control water flow in the soil-plant system and ultimately affect crop irrigation requirements. This work sets out to estimate root water conductivity for three self-rooted or grafted table grape cultivars.</p><p style="text-align: justify;"><strong>Methods and results</strong>: We evaluated root water conductivity of the cultivars ‘Black Magic’, ‘Matilde’ and ‘Victoria’ grafted onto 1103 Paulsen rootstock or self-rooted. Measurements were performed on two-year-old table grapes grown in pots filled with pumice. Root water conductivity wa…