Functional polypropylenes (FPs) are regarded as versatile building blocks for next-generation materials; however, their development has been stymied due to current synthetic limitations. Here, we report a diverse range of functionalized prepared via two-step copolymerization−postmodification strategy. Solution-phase copolymerization propylene and 11-bromo-1-undecene using C2, C1, Cs-symmetric catalysts-afforded poly(propylene)-co-(11-bromo-1-undecene), with tunable comonomer incorporation...

Phosphonate-modified polypropylenes (PPR; R = PPr, P(O)(OiPr)2; PPh, P(O)(OPh)2) have been prepared via a two-step synthesis and display enhanced thermal stability, offering potential as compatible single-component flame-retardant additives for PP systems. typically displays high flammability poor fire resistance, which consequently restricts applications. Solution-phase copolymerization of propylene 11-bromo-1-undecene using commercial rac-ethylenebis(indenyl)zirconium dichloride afforded...

Amine-modified polypropylenes (PPR, R = NH(Et)2 (DEA); NH(Et)(CH2CH2OH) (EAE); NH(CH2CH2OH)2 (DEOA)) have been prepared via a two-step synthesis and display enhanced adhesive performance with respect to both steel polypropylene (PP) substrates. PP typically displays poor adhesion polar substrates, which consequently restricts its utility as hot-melt (HMA). Solvent-free, quantitative postmodification of poly(propylene)-co-(11-bromo-1-undecene) (range comonomer incorporations (3-9 mol %))...

Purpose: To report the initial experience of magnetic resonance (MR) digital subtraction angiography (MR-DSA) in dynamic assessment cerebral circulation acute non-traumatic intracerebral hemorrhage (ICH). Material and Methods: Twelve patients with ICH were investigated within 6 days ictus using a contrast-enhanced 2-D MR angiogram that produces subtracted images temporal resolution 1–2 frame/s. The MR-DSA examinations assessed for evidence an intracranial vascular abnormality compared (i)...

To determine whether theta burst repetitive transcranial magnetic stimulation is an effective treatment for chronic tinnitus compared with a control stimulus.A two-arm, single-blind, randomized controlled trial comparing active group to placebo group.Neurotology department of tertiary referral center.Forty new and existing patients unilateral or bilateral were recruited from specialist hearing balance clinics.The subjects into two groups representing the sham subcategories. Two 40 second...

Methods of comparing mammograms produced by radiation derived from tungsten and molybdenum anodes are described. In film mammography better images were obtained using radiation. xeromammography equal quality either technique. However, the dose required for good a source was significantly higher than tungsten.

Identification of the source subarachnoid haemorrhage (SAH) can be a challenge in presence multiple aneurysms. This study was carried out to assess whether radioanatomical features on noncontrast enhanced computerised tomography (CT) scans may value localizing ruptured intracranial The diagnostic CT 56 consecutive patients, investigated for SAH with cerebral angiography, over period six months were available review. Various assessed: (1) pattern blood (e.g. predominant site and location near...

The Trimax system offers film/screen combinations which reduce the X-ray exposure by factors of about 4. This is achieved without deterioration in image quality.

Functional and stable polymeric arsenical nanoparticles can be prepared by sequential reductive coupling ring-collapse radical alternating copolymerisation (RCRAC).

Basilar invagination (BI) is a complex condition characterized by prolapse of the odontoid into brain stem/upper cervical cord. This lesion often associated with Chiari malformations, and rheumatoid arthritis (RA). Treatment options for BI typically include traction, an isolated anterior transoral odontoidectomy, endonasal posterior fusion, or combined anterior/ surgical approach.A 45-year-old female I malformation RA underwent C0-C5 decompression/fusion, followed odontoidectomy (i.e....

Efficient near-infrared (NIR) laser marking on transparent polymers like polypropylene, epoxy, and polyethylene has posed a big challenge due to their lack of absorption in the NIR. Currently, inorganic additives are used improve NIR efficiency, but they come with issues such as toxicity, high loading requirement, adverse effects color/opaqueness, need for low head speeds. Herein, we report new strategy incorporating food-grade, Mg2Al-CO3 LDH boosting coadditive alongside commercial additive...

Four strategies to enhance the processability of UHMWPE are explored using heterogenised metallocene catalysts produce polymers with decreased melt viscosity and excellent mechanical performance.

We were interested to read the paper by Dr. G. B. Young in your November issue (1974) which he summarized dose given per exposure for several film-screen combinations mammography. Since evaluating xeroradiography as a mammographic technique (Evans et al., 1975) we have been investigating changes of image quality decreases using some same materials and also rare-earth screens recently introduced.

Abstract BACKGROUND Although gross total resection (GTR) with chemoradiation is the standard of care for treating glioblastoma (GBM), tumor infiltration and treatment sequelae can impair activity eloquent regions. Transcranial magnetic stimulation (TMS) has been explored as an adjunct therapy to rehabilitation post-stroke motor deficits. TMS could be effective postoperative in GBM, but its effect on GBM cells not evaluated. While utilizes fields induce electrical currents at low frequencies...