نتایج جستجو برای: زیولیت itq

تعداد نتایج: 304  

2018
Mark Shevlin Philip Hyland Neil P Roberts Jonathan I Bisson Chris R Brewin Marylene Cloitre

Background: Two 'sibling disorders' have been proposed for the 11th version of the International Classification of Diseases (ICD-11): Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD). To date, no research has attempted to identify the optimal symptom indicators for the 'Disturbances in Self-Organization' (DSO) symptom cluster. Objective: The aim of the current study was to assess t...

Journal: :Chemical communications 2012
Thomas Carey Avelino Corma Fernando Rey Chiu C Tang Joseph A Hriljac Paul A Anderson

X-Ray powder diffraction studies have been used to measure the thermal expansion properties of three zeolites with the LTA topology and provide details of the underlying structural changes. Siliceous ITQ-29 and dehydrated and hydrated silver zeolite A have large negative, moderate negative and positive thermal expansion coefficients, respectively.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی شیمی 1387

تبدیل متان با دی اکسید کربن سبب تولید گاز سنتز با نسبت h2/co کمتر از واحد می شود که برای سنتز بسیاری از مواد شیمیایی به کار می رود. به دلیل به کار گیری دو گاز گلخانه ای متان و دی اکسید کربن، واکنش اخیر از دیدگاه زیست محیطی نیز حایز اهمیت فراوان می باشد؛ زیرا تبدیل این گازها به مواد شیمیایی با ارزش، سبب کاهش چشمگیر آلودگی گازهای مذکور در هوا می شوند. در این طرح، کاتالیست نیکل با دو نوع پایه زیول...

2017
Fabiane Urizzi Marcos T. Tanita Josiane Festti Lucienne T.Q. Cardoso Tiemi Matsuo Cintia M.C. Grion

OBJECTIVES This study sought to analyze the clinical and epidemiologic characteristics of critically ill patients who were denied intensive care unit admission due to the unavailability of beds and to estimate the direct costs of treatment. METHODS A prospective cohort study was performed with critically ill patients treated in a university hospital. All consecutive patients denied intensive ...

2017
Thanos Karatzias Marylene Cloitre Andreas Maercker Evaldas Kazlauskas Mark Shevlin Philip Hyland Jonathan I Bisson Neil P Roberts Chris R Brewin

The 11th revision to the World Health Organization's International Classification of Diseases (ICD-11) proposes two distinct sibling conditions: Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD). In this paper, we aim to provide an update on the latest research regarding the conceptual structure and measurement of PTSD and CPTSD using the International Trauma Questionnaire (ITQ) as ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2010
A Corma M J Díaz-Cabañas J Jiang M Afeworki D L Dorset S L Soled K G Strohmaier

The first zeolite structure (ITQ-40) that contains double four (D4) and double three (D3) member ring secondary building units has been synthesized by introducing Ge and NH(4)F and working in concentrated synthesis gels. It is the first time that D3-Rs have been observed in a zeolite structure. As was previously analyzed [Brunner GO, Meier, WM (1989) Nature 337:146-147], such a structure has a ...

Journal: :Angewandte Chemie 2014
Fei-Jian Chen Yan Xu Hong-Bin Du

Zeolites with extra-large pores have attracted great attention because of their important applications such as in hydrocracking, catalysis, and separation of large molecules. Despite much progress has been made during the past decades, the synthesis of these materials remains a big challenge. A new extra-large-pore zeolite NUD-1 (Nanjing University Du's group zeolite no. 1) is synthesized by us...

Journal: :Chemical communications 2010
Aisheng Huang Jürgen Caro

A neutral framework cation-free hydrophobic ITQ-29 molecular sieve membrane with hydrogen selectivity was prepared on porous α-Al(2)O(3) supports by using Kryptofix 222 as organic structure directing agent through secondary growth method.

Journal: :Chemical communications 2013
Hyung-Ki Min Seung Hyeok Cha Suk Bong Hong

The nitrogen-substituted delaminated ITQ-2 zeolite was found to be a highly active and recyclable catalyst for the Knoevenagel condensation of bulky aromatic aldehydes with ethyl cyanoacetate which cannot take place over the base sites placed within the micropores of conventional zeolites due to spatial limitations.

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