This website uses cookies to ensure you have the best experience. Learn more

Information Of Macrocyclic Systems Or Cyclophanes

1334 words - 6 pages

Macrocyclic systems; Otherwise known as cyclophanes are the most regarded chemical compounds and substances in biochemical and medicinal chemistry of the last decades. Their role in understanding molecular processes in biochemical system, material science, encapsulation, catalysis, hydrometallurgy, activation, separation transportation phenomenon among many other important roles had made them attract greater attention in both science and medical fields of research and studies [1-8]. Paraquat type of macrocyclic compounds have also been studied in view of their host-guest chemistry [9], redox behaviour [10], catalytic activity [11], and incorporation into supramolecular architectures.
Macrocyclic compounds have also been designed as special ligands to mimic the function of natural carrier molecules in recognizing and transporting specific metal cations, anions or neutral molecules and in understanding and reproducing the catalytic activity of metallo-enzymes and proteins [1–8].
A large number of macrocyclic compounds have been synthesized to specifically identify the role played by the different donor atoms, their relative position, the number and size of the chelating rings formed, the flexibility and the shape of the coordinating moiety on the selective binding of charged or neutral species and on the properties arising from these aggregations [12-13]
The study of hetero macrocyclic systems is of great interest both from the theoretical and practical point of view. Hetero macrocyclic compounds also play an important role in the design and discovery of new physiological pharmacologically active compounds. These compounds constitute the structural frameworks of several naturally occurring alkanoids that show a wide range of pharmaceutical and industrial importance [14].
Metal complexes of macrocyclic systems; Emphasis was given to the coordination of various macrocyclic phane systems with certain metal ions in both the lanthanide and the transition series to produce complex compounds of desired medical and pherceutical importance.
Heterocyclic compounds incorporated in a macrocyclic ring provide rigidity and are able to participate in complexation through their soft donor atoms; for example macrocyclic ethers with pyridine and other nitrogen containing heterocyclic subunits were reported to form strong and selective interactions with various charged and neutral guest molecules [15-19]
Many of such macrocyclic ligand-metal complexes otherwise called organometalics had achieved positive application in medical diagnosis and treatments. For example, Gadolinium complexes of certain macrocyclic ligands are used in hospitals to improve the contrast of magnetic resonance images (MRI) [15]. Manganese macrocyclic complexes have achieved significant progress owing to the increase recognition of Mn (II) functions in biological system [20-21].
The stability of macrocyclic metal complexes depends upon a number of factors,...

Find Another Essay On Information of Macrocyclic Systems or Cyclophanes

Benefits Of Information Systems (IS) Essay

2093 words - 9 pages more and more frequently Web-based, through new data warehouses and intelligent applications: data-mining and text-mining software, online analytical processing (OLAP) applications, decision support systems, and reporting capabilities. New information development techniques are object- or hypertext-based (Hartman, 2000). The multimedia capabilities of new personal computers offer more intuitive interfaces and better person-machine interaction

Management of Information Systems in an Organization

884 words - 4 pages integration, testing and implementation; and • Audit or evaluation of the project’s progress and results. (7) CONCLUSION MIS personnel must be technically qualified to work with computer hardware, software, and computer information systems. Currently, colleges and universities cannot produce enough MIS personnel for business needs, and job opportunities are great. MIS managers, once they have risen through their technical ranks of their

Questions and Answers: History of Information Systems

975 words - 4 pages regard that these systems have been in use in most areas of business and personal life. The other tool I found is the Oracle designer. This CASE tool is an information system designing tool and the manufacturer of this tool is Oracle. b. What is the number of installed bases, or IT shops, using each of these CASE tools? The enterprise architect is installed in three departments for example, the finance department where the presence of these

Collection of Information for Systems Analysis

1442 words - 6 pages A critical part for systems analysis is the collection of information. From the very beginning, analyst need to understand the information systems that are currently in use. Besides, analyst has to find out expectations of users about how they prefer to improve the current systems and organizational operations with the new or replacement information systems. Last but not least, analyst will need to discover how users feel about the new or

The Development of Strategic Information Systems Theory

10152 words - 41 pages The Development of Strategic Information Systems Theory During the last 15 years, an area has developed within the Information Systems discipline which is generally referred to as 'strategic information systems'. It concerns itself with systems whose importance to the organisation extend beyond merely assisting it to perform its existing functions efficiently, or even just effectively. A strategic information system is instrumental in

The Information Systems of Amazon Inc

1825 words - 7 pages The Information Systems of Amazon Inc, Inc. is the leading online retailer of books. The ¡§Earth¡¦s Biggest Bookstore¡¨ opened its virtual doors in July 1995 with a mission to use the Internet to transform book buying into the fastest, easiest, and most enjoyable shopping experience possible1. Amazon still holds their commitment to customer satisfaction and the delivery of an educational and inspiring shopping experience in high

Evaluation of Information Systems Management and Business Information Management

1263 words - 6 pages subject offer is balanced between the information systems, information technology and management. This program was in major of systems and the minor is records and library subjects. It depends on the students to choose whether wants to take records or library. The example of subject offer is Foundation of Information and Communication Technology, Foundation of Information Management, Library Skill, Introduction in Records Management and others

Vulnerability of computerised accounting information systems to computer crime

1597 words - 6 pages entering the transactions but processing it to give organisations a different direction as well. With the increasing dependence of accounting on the information systems, it has exposed it to the computer crime. Computer crime can be defined as an criminal activity directly related to the use of computers, specifically illegal trespass into the computer system or database of another, manipulation or theft of stored or on-line data, or sabotage of

Code of Ethics in Computing and Information Systems

1400 words - 6 pages throughout the world; ever notice your computer updating or have you checked Microsoft for a list of available updates. The term “ethical hacker” refers to security specialist that attempt to hack the systems of business or government to expose vulnerabilities of said system. This is and should always be done as a measure to help cope with the constantly changing landscape that we refer to as computers and computer information systems. Personal

Information Systems and the Organization of Modern Enterprise

4693 words - 19 pages solution" of transferring information, or the "organizational redesign solution" of moving decision rights, can be an effective approach toward achieving the necessary collocation of information and decision rights. When information systems change radically, one cannot expect the optimal organizational structure to be unaffected. Considering the interplay among information, incentives and decision rights in a unified fashion leads to new insights and a

The vulnerability of computerised accounting information systems to computer crime

1509 words - 6 pages organizations have computer security to protect their Information Systems in terms of physical security, personnel security, communications security and operations security (Power 2000). However, almost no organization is exempted from in some way by computer crime. Every year, American companies suffered losses at least $250 billion from computer crime (Trembly 1999). Therefore, it is no debate that computer crime is a serious problem.But, in fact

Similar Essays

Investigation Of Information Systems Essay

2125 words - 9 pages Investigation of Information Systems 1. Definition of an Information System: An Information System is a combination of hardware, software, people, procedures and data that provides data processing capabilities for a business or organization. More sophisticated information systems provide the decision makers in a business (eg. the executives or managers) with on-demand reports and inquiry capabilities as well as

Role Of Information Systems Essay

1005 words - 4 pages In today's high-paced job market, having the right technology to get the job done more efficiently is of high demand. That is why having the correct blend of information systems to assist in this process is imperative. Information systems include many different resources and not just one thing. They include computers, the instructions to operate the computers, people to operate the system, and procedures for the people to follow (Nickerson, 2001

Strategic Use Of Information Systems Essay

3972 words - 16 pages under in the matter of months.1. IntroductionAn information system, can be defined technically as a set of interrelated components that collect (or retrieve), process, store and distribute information to support decision making and control in an organization. In addition to supporting decision making, coordination and control information systems may also help managers and workers analyze problems, visualize complex subjects, and create new

Benefits Of Management Information Systems Essay

596 words - 3 pages Evolution of technology has a better option in the revolution of the world thereby progressing from the Stone Age to the classier development and implementation of systems rich in “human intelligence”. The purpose and relevance of management information system is to give direct control to executives to make decisions that give dynamic takeover of the company’s goals. An active Management information system combines data amassed by company’s