Development of a Novel Cu-Zn Based Heterogeneous Catalyst for Direct Methane Conversion

Many researchers are working on an efficient method to convert methane into methanol because the main cause of global warming is due to the burning of petroleum, which emits greenhouse gases. The extraction of crude oil would pollute our environment. The present method of methanol production is inefficient and generally yields less than 5%. Moreover, the traditional two-step process is very expensive and energy intensive. Therefore, the primary objective of my research is to develop a novel Cu-Zn based heterogeneous catalyst to enhance the catalytic conversion of methane for the synthesis of value added chemical such as methanol. The Cu-Zn-based solution we developed can be tuned to be either acidic or basic to adapt to different catalyst supports. The solution was characterized by Ultraviolet-visible spectroscopy and the band adsorption for Cu and Zn was observed. The heterogeneous catalyst was synthesized on alumina support (acidic) and active carbon support (basic) via Wet Incipient Impregnation method. The synthesized catalyst is to be tested for methane oxidation at Brookhaven National Lab (BNL). Catalyst characterization such as Brunauer Emmett Teller (BET) surface area, pore size and volume, Transmission Electron Microscope (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) will be carried out at BNL and Dalian Institute of Chemical Physics (DICP, a top institute in catalysis in China) with an aim to establish a relationship between activity and various properties. This fundamental study will serve as good guidance for us to understand the reaction pathway of methane oxidation

Climacteric Nature of the Carambola (A verrhoa carambola L.) Fruit.

The carambola (Averrhoa carambola L.) is determined to be a non-climacteric type fruit. The characteristic upsurge of carbon dioxide exhibited by climacteric fruits during the ripening process was not evident in carambola fruits of differing maturity. The ethrel treated fruit showed no sudden sharp increase in carbon-dioxide nor an ethylene peak

Second Language Socialization in a Bilingual Chat Room: Global and Local Considerations

This paper considers how global practices of English on the Internet intersect with local practices of English in the territorial or national sphere in constructing the language experiences of immigrant learners. Using a multi-contextual approach to language socialization, this paper examines the social and discursive practices in a Chinese/English bilingual chat room and how this Internet chat room provides an additional context of language socialization for two teenage Chinese immigrants in the US. Analysis of discourse, interview, and observational data reveals that a mixed-code variety of English is adopted and developed among the focal youth and their peers around the globe to construct their relationships as bilingual speakers of English and Cantonese. This language variety served to create a collective ethnic identity for these young people and allowed the girls to assume a new identity in speaking English that doesn't follow the social categories of English-speaking Americans versus Cantonese-speaking Chinese in their local American context. This paper makes the case for studying how people navigate across contexts of socialization in the locality of the nation-state and the virtual environments of the Internet to articulate new ways of using English

Biochemical Changes, Use of Polyethylene Bags, and Chilling Injury of Carambola (Averrhoa carambola L.) Stored at Various Temperatures

The effects of storage temperature and the use of polyethylene film on chilling injury and biochemical changes in carambola (Averrhoa carambola L.) fruits were studied. The pH, total soluble solid changes were not significantly different in ripe and unripe fruits stored at 5°, 10°, 15° and 20°C. No starch was detected in either ripe or unripe fruits, and no significant changes occurred in the total sugar content. Unripe fruits pacted in sealed perforated and nonperforated polyethylene bags stored at 20° C those in perforated bags or the control after 1 and 3 weeks in storage. Chilling injury of unripe carambola fruits, less than 25% full yellow in colour, occurred after 5 weeks in storage. The degree of injury was slight but became more severe as storage time lengthened. The ribs of the fruits turned black and dark brown patches appeared on the surface of the skin. Unripe fruits having less than 25% yellow colour on the skin surface suffered chilling injury after 5 weeks storage at 5° C. The severity increased with storage time. The physiological disorder appeared as dark green brown patches on the skin, shrivelled and darkened ribs, and failure of the fruits to turn yellow when transferred to 20° C. INTRODUCTION An important chemical composition of a fruit that determines its sweetness at maturity is the amount of sugar present. Chan and Heu (1975) identified the major sugars in carambola as fructose, glucose, and sucrose. Pratt lFood Technology Division, MARDI, Serdang, Selangor. 39 et al. (1977) foun

Gaudin Hamiltonians on unitarizable modules over classical Lie (super)algebras

Let $M$ be a tensor product of unitarizable irreducible highest weight modules over the Lie (super)algebra $\mathcal{G}$, where $\mathcal{G}$ is $\mathfrak{gl}(m|n)$, $\mathfrak{osp}(2m|2n)$ or $\mathfrak{spo}(2m|2n)$. We show, using super duality, that the singular eigenvectors of the (super) Gaudin Hamiltonians for $\mathcal{G}$ on $M$ can be obtained from the singular eigenvectors of the Gaudin Hamiltonians for the corresponding Lie algebras on some tensor products of finite-dimensional irreducible modules. As a consequence, the (super) Gaudin Hamiltonians for $\mathcal{G}$ are diagonalizable on the space spanned by singular vectors of $M$ and hence on $M$. In particular, we establish the diagonalization of the Gaudin Hamiltonians, associated to any of the orthogonal Lie algebra $\mathfrak{so}(2n)$ and the symplectic Lie algebra $\mathfrak{sp}(2n)$, on the tensor product of infinite-dimensional unitarizable irreducible highest weight modules

12-Month naturalistic outcomes of depressive disorders in Hong Kong's primary care

Open Access Journalpublished_or_final_versio

Help-seeking intentions and subsequent 12-month mental health service use in Chinese primary care patients with depressive symptoms

published_or_final_versio

Method of optical treatment

US7506983; US7506983 B2; US7506983B2; US7,506,983; US 7,506,983 B2; 7506983; Application No. 10/954,631Inventor name used in this publication: Chi Ho ToInventor name used in this publication: Siu Yin LamUSVersion of Recor

社會工作價值在香港的本土化過程 : 一個硏究的方向

published_or_final_versio

Quadratic and cubic Gaudin Hamiltonians and super Knizhnik-Zamolodchikov equations for general linear Lie superalgebras

We show that under a generic condition, the quadratic Gaudin Hamiltonians associated to $\mathfrak{gl}(p+m|q+n)$ are diagonalizable on any singular weight space in any tensor product of unitarizable highest weight $\mathfrak{gl}(p+m|q+n)$-modules. Moreover, every joint eigenbasis of the Hamiltonians can be obtained from some joint eigenbasis of the quadratic Gaudin Hamiltonians for the general linear Lie algebra $\mathfrak{gl}(r+k)$ on the corresponding singular weight space in the tensor product of some finite-dimensional irreducible $\mathfrak{gl}(r+ k)$-modules for $r$ and $k$ sufficiently large. After specializing to $p=q=0$, we show that similar results hold as well for the cubic Gaudin Hamiltonians associated to $\mathfrak{gl}(m|n)$. We also relate the set of singular solutions of the (super) Knizhnik-Zamolodchikov equations for $\mathfrak{gl}(p+m|q+n)$ to the set of singular solutions of the Knizhnik-Zamolodchikov equations for $\mathfrak{gl}(r+k)$ for $r$ and $k$ sufficiently large