could take part in reacting with the substance that it is placed in. 7. Why should latex gloves be worn when preparing chromatography plates? Latex gloves should be worn to prevent contamination of the chromatogram 8. The sample fine thin-layer chromatography plate‚ shown below‚ was prepared by spotting methyl red at R‚ sudan III at S‚ and bromocresol green at G. A single drop of each was placed on M. The plate was put in the developing solution until the solvent front reached 10 cm. Estimate
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Marks QUESTION 1 a) State FOUR (4) principles underpinning the Open Systems Interconnection (OSI) Reference Model. b) Describe the purpose of the physical layer of the OSI Reference Model. c) State THREE (3) elements of network design that relate to the physical layer of the OSI Reference Model. d) Describe the purpose of the data link layer. 4 1 3 2 Total 10 Marks QUESTION 2 a) b) c) d) Define the term a packet as used in computer networks. Briefly describe the THREE (3) key components
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Experiment 10 Thin Layer Chromatography Purpose! To identify how many components are in a mixture and the identity of a compound in a mixture by comparing the Rf of a known compound with the Rf of an unknown compound. Intodection. In this experiment the thin-layer chromatography the (TLC) will be used to determine the composition of various over-the-counter analgesic. We will be given two commercially prepared TLC plates with a flexible backing and a silica-gel coating with a fluorescent
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June 19‚ 2011 Fernando Casafranca Here are the short answer responses for the following terms: • Synchronous and asynchronous 1 SYNCHRONOUS Synchronous systems negotiate the communication parameters at the data link layer before communication begins. Basic synchronous systems will synchronize both clocks before transmission begins‚ and reset their numeric counters for errors etc. More advanced systems may negotiate things like error correction and compression. 2
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synthetic. Chromatography is the separation of two or more compounds or ions caused by their molecular interactions with two phases – one moving and one stationary (Weldegirma 2012). Three types of chromatography are used in organic chemistry: Thin Layer Chromatography (TLC)‚ Gas Chromatography (GC)‚ and Column Chromatography (CC). TLC stationary phase is a solid while the mobile phase is liquid. GC stationary phase is liquid and its mobile phase is liquid. CC is one of the most useful methods for
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To: Wesley Clark From: Lizzie Heath Date: March 4‚ 2013 Subject: Thin-Layer Chromatographic Analysis of Drug Components (Experiment #15) The purpose of this experiment is to determine the components of an unknown drug and identify it as one of six (6) commercial drugs by using thin-layer chromatography. I added approximately a quarter of a tablet of acetaminophen‚ aspirin‚ caffeine‚ ibuprofen‚ salicylamide‚ and the unknown (#19) to separate test tubes containing 2.5mL of dichloromethane
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Thin Layer Chromatography of Food Dyes Submitted by Class Partners Instructor : Lyndsay Grover : BIOL 10000 lab. : Awatif Hagelamin : Farag Soliman Date lab performed : February 3‚ 2011 Date of submission : February 10‚ 2011 FENNELL CAMPUS HAMILTON‚ ONTARIO 1/3 Purpose: The purpose of this experiment was to observe the reactions of food dyes with thin layer chromatography paper in order to find the components of an unknown solution. The practical applications of thin layer chromatography
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Compiled by A.K.Asokan. (E-mail:asokanak@hotmail.com) Page Nos.1 of 16 WIDE AREA NETWORK Local Area Network can be easily understood since typically every office has a LAN. One could personally see the switches connecting various computer nodes and may be a router to which the switches are connected. Also we can see the Network Interface Card (NIC) at the back of the computer where we plug in the cable with the RJ45 connector‚ the blinking light etc. on the card. (Sometimes when it is not
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Unit 4 Research Project: MAC Sublayer The Media Access Control (MAC) is one of the sublayers contained in the Data Link Layer (DLL) of the Open Systems Interconnection (OSI) model. The MAC layer provides addressing and channel access control mechanisms‚ and works to transmit data from one Network Interface Card (NIC) to another across a connected network. Carrier Sensed Multiple Access with Collision Detection (CSMA/CD) is the process used by non-switched Ethernet to detect a clear channel between
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a new paradigm of utilizing resources and reducing the cost of ownership‚ it’s capable to offer Reliability as a Service (RaaS) when it’s integrated with the infrastructure layer‚ this integration is the key to achieve this goal where Multi-protocol Label Switching MPLS is linking the applications with infrastructure layer‚ this paper present the collaboration studies of protection components and integration with cloud computing to present the solution to offer reliability to the applications
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