Results 101 to 110 of about 184,196 (308)

Surface structure of thin asymmetric PS-b-PMMA diblock copolymers investigated by atomic force microscopy [PDF]

open access: yes, 2007
Asymmetric poly(styrene-b-methyl methacrylate) (PS-b-PMMA) diblock copolymers of molecular weight M-n = 29,700g mol(-1) (M-PS = 9300 g mol(-1) M-PMMA = 20,100 g mol(-1), PD = 1.15, chi(PS) = 0.323, chi(PMMA) = 0.677) and M-n = 63,900 g mol(-1) (M-PS = 50,
Hamley, Ian W.   +3 more
core   +1 more source

Common Signatures of Altered Gene Regulation and Invasiveness of Different Breast Cancer Cell Lines after Matrix Interface Crossing

open access: yesAdvanced Healthcare Materials, EarlyView.
Interface transmigration reprograms triple‐negative breast cancer cells, triggering a shared switch toward more aggressive and invasive phenotypes. Using a collagen I interface model, this study identifies shared transcriptional changes involving proliferation, chromatin remodeling, and DNA repair pathways.
Cornelia Clemens   +3 more
wiley   +1 more source

MODIFICATION EFFECT OF AL2O3 NANOFIBRES AND MALEIC ANHYDRIDE STYRENE COPOLYMER ON ULTRAHIGH MOLECULAR WEIGHT POLYETHYLENE: MECHANIC AND TRIBOLOGICAL PROPERTIES

open access: yesAdvanced Engineering Research, 2012
The test results on the mechanical and tribological properties of the composite materials based on ultrahigh molecular weight polyethylene, chemically styrenated by maleic anhydride, depending on the component s and filler content, such as aluminium ...
Victor V. Ilyasov, Van Chuong Nguyen
doaj  

Carbolithiation of N-alkenyl ureas and N-alkenyl carbamates

open access: yesBeilstein Journal of Organic Chemistry, 2013
N-Alkenyl ureas and N-alkenyl carbamates, like other N-acyl enamines, are typically nucleophilic at their β-carbon. However, by incorporating an α-aryl substituent, we show that they will also undergo attack at the β-carbon by organolithium nucleophiles,
Julien Lefranc   +2 more
doaj   +1 more source

Simulação numérica aplicada para avaliar o efeito da pré-polimerização no comportamento de reatores tubulares Numerical simulation to evaluate the effect from pre-polymerization on the behavior of tubular reactors

open access: yesPolímeros, 2007
O presente estudo utiliza um modelo matemático fenomenológico para simular um sistema de polimerização contínuo em dois estágios. Este sistema é composto por um reator contínuo tipo tanque agitado (CSTR), para pré-polimerização do monômero (primeiro ...
André L. Nogueira   +3 more
doaj   +1 more source

Compound oxidized styrylphosphine [PDF]

open access: yes, 1979
A process is described for preparing flame resistant, nontoxic vinyl polymers which contain phosphazene groups and which do not emit any toxic or corrosive products when they are oxidatively degraded.
Paciorek, K. J. L.
core   +1 more source

Influence of processing parameters and composition on the effective compatibilization of polypropylene–poly(ethylene terephthalate) blends [PDF]

open access: yes, 2016
The effects of the addition of different functionalized compatibilizers on toughness, morphology and rheological properties of a polypropylene (PP) - poly(ethylene terephthalate) (PET) (85-15 wt%) blend were studied.
Koster, Rolf   +3 more
core   +1 more source

Oxygen Supply of Islets of Langerhans by Photosynthetically Active Microalgae in Bioprinted Co‐Cultures Maintains Their Function in a Hypoxic Environment

open access: yesAdvanced Healthcare Materials, EarlyView.
This study developed a bioprinted co‐culture system embedding rat pancreatic islets and Scenedesmus sp. microalgae spatially defined in close vicinity. Red light was found optimal to ensure microalgal photosynthesis while maintaining islet viability and functionality. A tailored co‐culture medium supported both cell types.
Finn Dani   +7 more
wiley   +1 more source

Catalytic and mechanistic studies into the epoxidation of styrenes using manganese complexes of structurally similar polyamine ligands [PDF]

open access: yes, 2014
The synthesis and catalytic activity of manganese(ii) complexes of two polyamine ligands is reported which highlights how a small structural change in the ligand affects the overall catalytic behaviour.
Al-Safadi, R   +5 more
core   +1 more source

Thermal Processing Creates Water‐Stable PEDOT:PSS Films for Bioelectronics

open access: yesAdvanced Materials, Volume 37, Issue 13, April 2, 2025.
Instead of using chemical cross–linkers, it is shown that PEDOT:PSS thin films for bioelectronics become water‐stable after a simple heat treatment. The heat treatment is compatible with a range of rigid and elastomeric substrates and films are stable in vivo for >20 days.
Siddharth Doshi   +16 more
wiley   +1 more source

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