نتایج جستجو برای: nanoporous silica

تعداد نتایج: 41668  

Journal: :Advanced Optical Materials 2022

Abstract Circularly polarized room‐temperature phosphorescence (CPRTP) is of paramount importance for applications in information encoding, bioimaging, and optoelectronic devices, however, it remains challenging to organize highly efficient CPRTP materials with controlled handedness long afterglow. Herein, as an outstanding novel finding, diclosed that ultralong on‐demand chiroptical properties...

Journal: :Biomedical Engineering / Biomedizinische Technik 2013

Journal: :iranian journal of pharmaceutical research 0
ghodsi mohammadi sakineh faramarzi alzahra university shima asadi alzahra university massoud amanlou tehran university

sulfonic acid functionalized sba-15 (sba-pr-so3h) with pore size 6 nm as an efficient heterogeneous nanoporous solid acid catalyst exhibited good catalytic activity in the biginelli-like reaction in the synthesis of spiroheterobicyclic rings with good yield and good recyclability. spiro-pyrimidinethiones/spiro-pyrimidinones-barbituric acid derivatives were synthesized in a simple and efficient ...

2011
Andre P. Garcia Nicola Pugno Markus J. Buehler

Biology implements intriguing structural design principles that allow for attractive mechanical properties—such as high strength, toughness, and extensibility despite being made of weak and brittle constituents, as observed in biomineralized structures. For example, diatom algae contain nanoporous hierarchical silicified shells, called frustules, which provide mechanical protection from predato...

2005
Scott M. Auerbach Miguel Jorge

Zeolites are nanoporous alumino-silicates used in industrial applications such as catalysis and separations. Understanding how zeolites nucleate and grow is of fundamental scientific and technological importance. In the past decade, silica nanoparticles have been found to play an important role in zeolite formation from clear solutions. To explore the properties of such nanoparticles, we have d...

Journal: :iranian journal of toxicology 0
محمد قشقائی mohammad ghashghaee department of process design and construction, iran polymer and petrochemical institute, tehran, iran. وحید فرزانه vahid farzaneh department of applied chemistry, semnan university, semnan, iran.

background: the removal of toxic metals from sewage and wastewaters is one of the most important concerns in the twenty first century. the removal of poisonous cr(vi) from aqueous solution by different low-cost available nanoporous adsorbents was investigated in the present study.  methods: fumed silica, bentonite (bn), hydrotalcite (ht), mcm-41, na-y, mordenite (mor) and sapo-34 were used at d...

2007
Dipankar Seth Mritunjay Mandal Nitai Debnath Ayesha Rahman N. K. Sasmal Sunit Mukhopadhyaya Arunava Goswami

Wild animals, pets, zoo animals and mammals of veterinary importance heavily suffer from trypanosomiasis 1 . Drugs with serious side effects are currently mainstay of therapies used by veterinarians. Trypanosomiasis is caused by Trypanosoma sp. leading to sleeping sickness in humans. Surface modified (hydrophobic and lipophilic) amorphous nanoporous silica molecules could be effectively used as...

Sulfonic acid functionalized SBA-15 (SBA-Pr-SO3H) with pore size 6 nm as an efficient heterogeneous nanoporous solid acid catalyst exhibited good catalytic activity in the Biginelli-like reaction in the synthesis of spiroheterobicyclic rings with good yield and good recyclability. Spiro-pyrimidinethiones/spiro-pyrimidinones-barbituric acid derivatives were synthesized in a simple and efficient ...

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