Hydroisomerization of long-chain alkane over Pt/SAPO-11 catalysts synthesized from nonaqueous media

SAPO-11 molecular sieves were synthesized from nonaqueous media. The effects of Si and Al sources as well as solvents on the catalytic performance of SAPO-11 were investigated by the hydroisomerization reaction of n-dodecane. The samples were characterized by XRD, XRF, N-2-adsorption, SEM, NH3-TPD, IR-NH3 and Si-29 CP MAS NMR. The SAPO-11 samples synthesized with tetraethoxysilane as the Si source showed higher Si incorporation contents than the SAPO molecular sieves prepared with polymeric Si sources (fumed silica and Si colloidal gel). The reaction results showed that Pt/SAPO-11 catalysts synthesized from ethylene glycol and glycerol media with the monomeric Si and Al sources (tetraethoxysilane, aluminum isopropoxide) exhibited higher catalytic activities than those catalysts with the polymeric Si or Al (pseudo-boehmite) sources, due to the larger external surface area and higher acidity of the former ones. Especially, the catalyst synthesized in an ethylene glycol medium possessed the highest catalytic activity. Over this catalyst, 88% conversion of n-dodecane was achieved at a low temperature of 250 degrees C.

Purification and characterization of recombinant truncated human interleukin-11 expressed as fusion protein in Escherichia coli

Mature human interleukin-11 (HuIL-11) is a cytokine consisting of 178 amino acid residues that results from scission of the N-terminal signal peptide, consisting of 21 amino acid residaues, from the corresponding nascent polypeptide. A DNA fragment encoding a truncated HuIL-11 (trHuIL-11), with an additional 5 amino acid residues removed from the N-terminus, was cloned into vector pGEX-2T between the BamHI site and the EcoRI site. Upon transformation with Escherichia coli BL21, the construct over-produced a glutathione S-transferase (GST)-fused protein in a soluble form after IPTG induction. The fusion protein was initially fractionated with butyl-Sepharose 4 fast flow column and by affinity chromatography using a GSH-Sepharose 4B column. On-site enzymatic release with thrombin gave the target protein at 96% purity as judged by SDS-PAGE and HPLC. Expression of the interleukin as a GST-fused protein thus greatly improved downstream processing. Subsequent biological activity assay suggested that trHuIL-11 had similar activity profile to the naturally produced sample and may be a promising candidate for further development as biopharmaceutical.

Eficiência de fungicidas para o controle da ferrugem-asiática da soja, Phakopsora pachyrhizi, na safra 2010/11: resultados sumarizados dos ensaios cooperativos.

2011

Avaliação de genótipos de girassol no Rio Grande do Sul - safras 2009/10 e 2010/11.

2011

A different kind of war? : September 11 and the United States' Afghan War

McInnes, C., 'A different kind of war? 11 September and the United States' Afghan war'. Review of International Studies, 29 (2), 165-184. RAE2008

Letter to nephew, 11/30/1881

Handwritten letter from Daniel D. Whedon to nephew, Daniel Avery Whedon. Dated November 30, 1881.

Letter to Ruth Merritt 11/10/1818

Handwritten letter from Timothy Merritt to sister (?) Ruth Merritt regarding her loss of religious conviction. Dated Nov. 10, 1818.

Letter to Rev. Epaphras Kibby. 01/11/1801

Handwritten letter from Timothy Merritt to Rev. Epaphras Kibby regarding lodging and preaching schedule. Sent in care of Mr. Lambert. Dated Jan. 11, 1801, Bath, ME.

Letter to nephew, 11/14/1881

Three page handwritten letter to nephew, Daniel Avery Whedon, from Daniel D. Whedon. Dated 11/14/1881.

Letter to nephew, 12/11/1868

Letter from Daniel Whedon to nephew, Daneil Avery Whedon. Dated December 11 1868.

imátgenes 10, 11 y 12

Fue el último en poseerla quien, instantes antes de perderla para siempre y movido por una presunción ya del todo instintiva, bautizó la ciudad con el nombre de Memoria grafiando esa palabra en las fachadas de las avenidas. Presumió que en un futuro, muy lejano quizá pero alcanzable, y a pesar de los trazos ya inseguros de su escritura afectada, alguien podría leerla y recobrar la lucidez.

Análisis de problemas en el libro de texto del estudiante de matemática en 11º año de enseñanza media en relación al eje datos y azar en el período escolar 2007 y 2011

El desarrollo de las habilidades para un conocimiento estadístico necesario es posible desarrollarlo y fortalecerlo por medio de variados recursos didácticos dispuestos para la enseñanza y aprendizaje. Dentro de los recursos disponibles es el texto de matemática el más utilizado por profesores y estudiantes. El texto debe entregar herramientas que permita a los estudiantes desarrollar una alfabetización matemática, realizando una focalización más explícita en los conocimientos, comprensión y habilidades requeridas para funcionar efectivamente en la vida diaria (PISA Chile, 2009).