3 synthesis of polyphosphazene silicate hybrid networks

... TOWARD SYNTHESIS OF A MACROCYCLIC HYBRID AROMATIC PENTAMER SUN XIAONAN (M.Sc.) PKU A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF SCIENCE DEPARTMENT OF CHEMISTRY NATIONAL UNIVERSITY OF SINGAPORE ... extra amount of alkali metal salts were added as a result of the     binding competition Figure 1.3 Accelerated and selective hydrolysis of methoxy ethers ortho to a NO2 group 1.2 Aim of Study We ... Scheme 2.1 Synthesis of trimer 1j Following the elaboration of the synthetic routes for the efficient preparation of various monomeric building blocks (1l, and 1m), a series of oligoamides (1h,...

Ngày tải lên: 30/09/2015, 10:11

... reliability zones of refrigerant compressors Parallel trains are costly and not benefit from economies of scale The use of parallel equipments such as parallel compression faces problems of flow imbalances ... to the feed stream According to technical publications of Air-Products, this baseline AP-XTM system is capable of producing up to 7.8 mta of LNG Further increases in capacity to 8-10 mta may be ... 3.2 illustrates the schematic of AP-XTM refrigeration system with its associated nomenclature at each node that is the basis of this optimization study Each section of this basic schematic is described...

Ngày tải lên: 13/10/2015, 16:41

... using deletion mutants of the 3¢ terminus of the minus-strand RNA but deletions were made on the basis of the structure of the 5¢UTR of the plus-RNA, the structure of the 3¢-end of the minusstrand ... involvement of sequences and ⁄ or structures in RNA synthesis directed in vitro by HCV NS5B by using new mutants of the 3¢-end of minus-strand RNA Results Effect of mutations in the 3¢- or the 5¢-end of ... alter the structure of the other domains of the (–)IRES RNA as determined by predicted secondary structure with RNA Draw software The structure of the first 151 nt nucleotides of wild-type and mutated...

Ngày tải lên: 20/02/2014, 01:20

... Fig.3.5 The effective permeability of Fe/SiO2/Epoxy composite change little compared with that of Fe/Epoxy composite, however, an obvious decrease of the real part of permittivity ε′ due to the silica ... particle sizes of commercial carbonyl iron particles are in the range of 1.29±0.58 μm, as evaluated from electron micrographs by counting over two hundred particles The SEM images of Fe and Fe/SiO2 ... microwave absorbing properties of Fe/SiO2 particles with core/shell structure provides an atomic ratio of Fe to Si about 5.4 Fig 3.2(e1, e2, e3 and e4) are elemental mappings of C, O, Fe and Si, respectively,...

Ngày tải lên: 08/09/2015, 19:43

... survey spectra of NCs prepared by ascorbic reduction of AgNO3 in the presence of Au@Pd NCs The inset in (B) is a high resolution XPS spectrum of Ag 3d 114 Figure 7.3 SEM images of hybrid NCs ... before the addition of the AgNO3 solution 116 Figure 7.4 (A) Schematic illustration of the main stages in the formation of cornersatellite hybrid NCs (B-E) TEM images of the hybrid NCs obtained ... at this time A better understanding of the mechanisms of formation of hybrid Chapter nanostructures is also needed for the development of synthetic protocols of general utility that can be applied...

Ngày tải lên: 09/09/2015, 18:49

... of binding groups Amination of hydroxyl groups, carboxylation of hydroxyl group, phosphorylation of hydroxyl group, carboxylation of amine group, amination of carboxyl group, saponification of ... plot (b) of Mn3O4 Figure 7.7 Figure 7.8 UV spectra of a solution of Victoria blue (100 mg L– , 50 mL) in the presence of Mn3O4 hollow microfibers (0.01 g) at different time intervals of 0, 2, ... University of Singapore is gratefully acknowledged ii TABLE OF CONTENTS Title page Declaration i Acknowledgements ii Table of Contents iii Summary vii List of Tables ix List of Figures xi List of Illustrations...

Ngày tải lên: 12/09/2015, 09:10

... speed that will offer optimal synthesis of this network This is not executed in this work as highly complex nature of the operating curve is the main barrier Due to unavailability of operating curves ... implemented into the model formulation This, however, necessitates the availability of performance curves of compressor systems in used today such as General Electric’s BCL and MCL series used ... inevitable that the accuracy of the model is compromised to some extent, though minor Therefore, as an improvement and to better reflect the actual efficiencies of compressor systems, a performance...

Ngày tải lên: 13/10/2015, 16:41

... capacities The cost of the SSTC is the sum of the incremental costs of its movers, which depend on the streams and flow capacities 85    Chapter Work Exchange Networks Synthesis The costs of helper motor ... The costs of heaters and coolers depend on the streams and are linear functions of their duties The costs of valves and utility movers depend on the streams and are linear functions of their flow ... cost ($/K) of heating or cooling stream s by K, pU the unit cost ($/kWh) of running the utility compressors, pM ($/kWh) the unit cost of running the SSTC motor, phs the unit cost ($/K) of operating...

Ngày tải lên: 13/10/2015, 16:41

... any number of cycles so that an in-depth knowledge is gained on the behavior of the existing refrigeration system 11    Chapter Literature Review This work focuses on the optimization of the AP-XTM ... Process Networks The chemical industry accounts for about 20% of the total industrial energy consumption in the USA14 Thus, conserving energy in chemical plants is crucial The two common forms of ... based on stochastic algorithms for the optimal design of mixed refrigerant cycles Hasan et al.12 documented their works on the optimization of compressor operations in an LNG plant to minimize...

Ngày tải lên: 13/10/2015, 16:41

... has the capacity of transporting an equivalent of several billion cubic feet of NG It was reported in year 2008 that at least 27.8% of international trade in NG is in the form of LNG and continued ... promising source of energy to power the future economy NG consists predominantly of methane (approximately 90%) with small amounts of ethane, propane and nitrogen as well as trace quantities of heavier ... optimization of LNG processes are necessary and has been gathering the attention of academic and industrial researchers all around the world In view of this, it is, therefore, in the interest of this...

Ngày tải lên: 13/10/2015, 16:41

... Professor Marcus A Tius for his financial support in the form of research assistanships as well as the Department of Chemistry of the University of Hawai‘i at Mānoa for support in the form of ... members: Professor Thomas Hemscheidt, Professor Philip Williams, Professor Kristin Kumashiro, and Professor Stefan Moisyadi for their time and wisdom, advice, and help I would like to thank Professors ... chloride in the presence of triethylamine, with a mixture of diacetates 67 in chloroform/acetone in the presence of p-TsOHH2O afforded bicyclic compound 73 The separation of 73 from unreacted phloroglucinol...

Ngày tải lên: 13/05/2016, 09:48

... Fast Retransmit o Probability p of choosing a given flow is proportional to the rate of the flow l more packets of that flow, higher probability of choosing one of its packets Queue Management ... Alternative to Marking and Policing: allocate a set portion of bandwidth to each application flow; can lead to inefficient use of bandwidth if one of the flows does not use its allocation o PRINCIPLE ... IntServ o DiffServ Queue Management Improving QOS in IP Networks o IETF groups are working on proposals to provide better QOS control in IP networks, i.e., going beyond best effort to provide some...

Ngày tải lên: 06/04/2013, 11:05

... to learn! Where are the eggs… were in the fridge A who B where C when D which What was the name of the man….wife became ill and was taken to hospital A who B whom C whose D which I have a book ... which C whom D whose 10 Thank you very much for your letter…you told me a very interesting story of your holiday A on which B which C in which D to which Answers: A D A 10 C Homework (2m) - Ask...

Ngày tải lên: 01/06/2013, 08:47

... chemicals used were of the highest purity available and of analytical grade Screening, isolation and identification of micro-organism Isolation of the microbial strain capable of IAA production ... concentration contained 0Æ5 ml of enzyme extract and 2Æ5 ml of 0Æ5 mol borate buffer (pH 8Æ5) containing 0Æ1 lmol of pyridoxal phosphate, 40 lmol of l-tryptophan and 20 lmol of a-ketoglutarate The reaction ... components of nutrient agar Effect of incubation time The effect of incubation time on IAA production was assayed by incubating bacterial cultures under optimum conditions up to 168 h Production of IAA...

Ngày tải lên: 06/08/2013, 21:06

... (IBM) SNAP SubNetwork Access Protocol SNMP Simple Network Management Protocol SOF Start of Frame SOHO Small Office, Home Office SONET Synchronous Optical Network SONET/SDH Synchronous Optical Network/Synchronous ... Switched Internetworks (CWSI) Dynamic VLANs allow a great deal of flexibility and mobility for end users, but require more administrative overhead 3.2 Extent of VLANs The number of VLANs will ... deletion of a VLAN, suspending or activating a VLAN, changing the name of a VLAN, and changing the MTU of a VLAN Subset advertisements can list the following VLAN parameters: status of the VLAN,...

Ngày tải lên: 16/10/2013, 13:15

... Department of Telecommunication Systems Department of Telecommunication Systems School of Engineering School of Engineering Publisher: Blekinge Institute of Technology Blekinge Institute of Technology ... reflects the Quality of Service from the viewpoints of the application and user The focus of the thesis is on the influence of the network on the applicationperceived Quality of Service and thus ... Europe provides date rates of up to Mbps Another important technology in the evolution of wireless networks is the Wireless Local Area Networks (WLANs) In the early days of WLANs industry-specific...

Ngày tải lên: 18/10/2013, 12:15

... dial-up situation might be needed as the central office; the branch office; and small office home office (SOHO) and Remote Office (RO) • The Central office should provide room for growth so that ... central office site The branch office considerations involve connecting to the central office while knowing the value/cost ratio of the bandwidth In addition, the availability of the central office ... system profile provides a declaration of what protocols can be used by the other profiles If a routing protocol is turned on in the system profile, it can be used by any profile If you turn off IPX...

Ngày tải lên: 18/10/2013, 18:15

... throughout the life of your data center The Three Principles of Data Center Infrastructure Design The Three Principles of Data Center Design When you understand the three principles of data center ... Principles of Data Center Infrastructure Design Understand These Three Principles and You’ll: • Lower your total cost of ownership • Support your future growth plans • Reduce your risk of downtime ... are able to: • Lower your total cost of ownership Cabling and connectivity components of the data center infrastructure can have a direct impact on the amount of real estate required in your data...

Ngày tải lên: 10/12/2013, 03:15

... 22 Activity 4.3: Value of Information Models Exercise 1: Identifying the Value of Information Models ! Identify the value of information models Think of how you have used information ... that informational modeling provides to the design process and specifically to the analysis step of conceptual design The instructor will write your answers on a flip chart ...

Ngày tải lên: 10/12/2013, 16:16

... Sources of Information Perspectives of Information Module 3: Characteristics of Information 57 ! Overview Slide Objective To provide an overview of the module topics and objectives " Categories of ... the four categories of information present in a set of information Module 3: Characteristics of Information 65 ! Sources of Information Slide Objective To provide an overview of the section " Artifacts ... broad view of information, you can increase your chances of gathering all of the input you need to make an effective analysis In this module, you will learn about four categories of information...

Ngày tải lên: 10/12/2013, 17:15