Cellulose templating

Chiral nematic mesoporous films of Eu " doped Zr02 have been produced via a hard-templating approach using nanoctystalline cellulose-templated silica (Fig. 11). It was found that these chiral nematic nanostructures are capable of modulating the spontaneous emission of the Eu ions. The emission lines of the Eu " at 596 nm, 613 and 625 nm were significantly suppressed, and an increase in the luminescence lifetime is observed. It was suggested that these new chiral luminescent nanomaterials could find potential applications in sensing and new optical nanodevices. 

Hwang S-H, et al. Construction of CdS quantum dots via a regioselective dendritic functionalized cellulose template. Chem Commun 2006 3495-7. 

Langfeld, K., Marschner, R., Frank, B., and Schomacker, R. (2011) Methane activation over cellulose templated perovskite catalysts. ChemCatChem, 3 (8), 1354-1358. 

Shigapov, A.N., Graham, G.W., McCabe, R.W., and Plummer Jr., H.K. The preparation of high-surface area, thermally stable, metal oxide catalysts and supports by a cellulose templating approach. Appl Catal. A Gen. 2001, 210, 287-300. 

CdS quanmm dots via a regioselective dendritic functionaUzed cellulose template. Chemical Communication 3495- 3497 Brus, L.E. (1984) Electron-electron and electron-hole interactions in small semiconductor crystalUtes The size dependence of the lowest excited electronic state. Journal of Chemical Physics 80 4403-4409 Jie M., Jun-Na Y., Li-Na W., Wei-Sheng, L (2008) Easily prepared high-quanmm yield CdS quantum dots in water using hyperbranched-polyethylenimine as modifier. Journal of Colloid and Interface Science 319 353-356... 

Cellulose-templated materials for partial oxidation of methane effeet of template and calcination parameters on catalytic performance... 

Keywords cellulose template, preparation procedure, Ni0x-Al203, POM... 

Cellulose-Templated NiO -Al/)3 Materials for Partial Oxidation of Methane... 

Polysaccharide synthesis is under enzymatic control, but does not occur from a template as in protein synthesis. For this reason, each molecule of a particular polysaccharide will have its own unique molecular weight. The molecular weight of a carbohydrate polymer is usually expressed as an average. Starch or cellulose chains, for example, may vary by several hundred thousand in their molecular weights between individual molecules. For an excellent review of carbohydrate chemistry, see Binkley (1988). 

Zeolites have been incorporated into and attached to fibers of various compositions for a number of applications. The types of fibers that have been used include glass [105], polymers by addition to the monomer prior to polymerization [106], optical fibers [107], cellulose pulp [108] and self-supported hoUow zeoHte fibers by a templating route [109]. 

As an example of hybridization of zeolites with cellulose derivatives, self-supporting zeolite membranes with a sponge-like architecture and zeolite microtubes were prepared by using CA filter membranes as a template [154]. The hierarchical structure with sub-nanometer- to micrometer-sized pores is a characteristic of great promise for a wide range of applications such as catalysis, adsorption, and separation. There was also an attempt to prepare alginate membranes incorporated with zeolites, e.g., for pervaporation separation of water/acetic acid mixtures [155]. 

Conditions for optimal recoveries of poly(A) containing RNA, with minimal contamination from rRNA, were investigated. The poly(A) fractions isolated were effective as an RNA template for the synthesis of complementary DNA with the RNA-dependent DNA polymerase of avian myeloblastosis virus. Poly(dT)-cellulose has also been used both in the purification of a 14 S messenger RNA for the immunoglobulin light chain from microsomes of MOPC 41 mouse myeloma that appeared to code for a precursor protein [117], and in the purification of RNA-dependent DNA polymerase from RNA tumour virus [118]. An example of the use of oligo(dT)-cellulose is provided by the purification of a viral specific RNA from sarcoma virus-transformed nonproducer cells [119]. 

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