ipl-logo

Polymeric Membranes Lab Report

993 Words4 Pages

Abstract New copolymeric membranes was offered for the efficient delivery of antibiotic drug using the synthesized chitosan–copoly(semicarbazide–formaldehyde–phenylhydrazine) blend membranes. The membranes were prepared by solution casting technique and characterized by elemental, spectral and scanning electron microscopy to establish the chemical structure and morphology. Scanning electron microscopy clearly reveals that the increased porosity in the polymeric network enables rapid swelling; leads to faster diffusion which facilitates effective drug release. The composition of chitosan content also governs the swelling behavior i.e. increased chitosan content showed excellent swelling behavior leads to profound drug delivery. The drug delivery results clearly indicates that the chitosan and its blend membranes have effectively released the antibiotic drug in a short time and proved to be a promising candidate for the drug delivery. The kinetic study of the drug release profile clearly establishes that the drug release is very well fit with the Higuchi model and also follows swelling and …show more content…

The reaction mixture was then cooled and poured into crushed ice with constant stirring and left overnight. A dark red coloured copolymer was obtained and washed with warm water, methanol and acetone followed by filtration to remove unreacted monomers and impurities. Finally, the copolymer was dried in an air oven at 75 °C for 24 h. The yield of the copolymer was found to be 85%. The copolymer was found to be soluble in solvents like dimethylsulphoxide, dimethylformamide and tetrahydrofuran and partially soluble in mineral acids. The mechanism of the synthesis of copolymer (SFP) is shown in Scheme

Show More
Related

Tn 4351 Unit 5 Lab Report

506 Words | 3 Pages

Tn 4351 was originally isolated from bacteroides fragilis [30] . The transposon was successfully introduced into Cytophaga succinicans, Flavobacterium meningosepticum, Flexibacter canadiansis, Flexibacter strain SFI and Sporocytophaga myxococcoides by conjugation [25]. Tn 4351carries two antibiotic resistance gene. One of the codes for resistance to erythromycin and clindamycin which is expressed in bactroides but not in E.Coli. The other gene codes for resistance in tetracycline and is expressed in aerobically grpwn E. coli, but not in anaerobically grpwn E. coli or in bacteroides.

Read More

Pt1420 Unit 2 Lab Report Sample

695 Words | 3 Pages

From the data obtained in Tables 1-3, we were able to plot multiple graphs using excel. These graphs give a better representation of the data as seen in Figures 1-9. It can be seen that each figure shows a slight increase in CO2 production, which signifies a possible change in metabolic rate. Figures 4 and 7 show a relatively large change between the control and fox urine. The changes in slope between theses two are 0.0267 for Figure 4’s slopes and 0.0192 for Figure 7’s slopes.

Read More

Tetraphenylnaphthalene Lab Report

779 Words | 4 Pages

Benzyne Formation and the Diels-Alder Reaction Preparation of 1,2,3,4 Tetraphenylnaphthalene Aubree Edwards Purpose: 1,2,3,4-tetraphenylnaphthalene is prepared by first producing benzyne via the unstable diazonium salt. Then tetraphenylcyclopentadienone and benzyne undergo a diels-alder reaction to create 1,2,3,4-tetraphenylnaphthalene. Reactions: Procedure: The reaction mixture was created. Tetraphenylcyclopentadienone (0.1197g, 0.3113 mmol) a black solid powder, anthranilic acid ( 0.0482g, 0.3516 mmol) a yellowish sand, and 1,2-dimethoxyethane (1.2 ml) was added to a 5-ml conical vial.

Read More

Pt1420 Unit 6 Lab Report

407 Words | 2 Pages

• Write down the highlighted numbers. Do you observe a pattern? • Does the pattern grow? What is the reason for this? • Write down the last number (say 53).

Read More

Pt1420 Unit 6 Lab Report

155 Words | 1 Pages

Suppose you need to find the fractional European call and the fractional European put options. Let the Hurst parameter be $H=0.85$, the $\sigma=0,25$, $r=0.10$, $S_{fbm} = 100$, $K = 95$, we have \begin{eqnarray*} d_1^{fBm} & = & \frac{\ln{\frac{S}{K}} + \frac{1}{2}(r( T - t) + \frac{(1)\sigma^2{( T^{2H} - t^{2H})}}{2})}{\sigma{\sqrt{T^{2H} - t^{2H}}}}\\ & = & \frac{\ln(\frac{105}{100}) + (0.10(0.25 -0) + \frac{(1){0.25^2}{0.25^{2(0.85)} - (1)0.25^{2(0.85)}}}{2}}{(0.25){\sqrt{0.25^{2(0.85)} - 0}})} \end{eqnarray*} we obtain $d^{fBm}_1= 1.0558$. We find in the normal distribution that $N(1.0558)= 0.8544$ and $N(-1.0558) = 0.1456.$

Read More

Pt1420 Unit 3 Lab Report

485 Words | 2 Pages

Testing phase finds differences in positive/negative documents by the centroid obtained in training phase by ranking each of them. The simple way to estimate similarity between documents and centroid by summing weights of patterns which are in the documents. VII. Experimental Results To determine accurate measures of similarity or difference between documents you depict results by graph pattern and table pattern. The experimental setup consists of relevant documents that you termed as positive and negative documents .i.e

Read More

Lab Report Chemistry Lab

728 Words | 3 Pages

The lab started off by measuring critical materials for the lab: the mass of an an empty 100 mL beaker, mass of beaker and copper chloride together(52.30 g), and the mass of three iron nails(2.73 g). The goal of this experiment is to determine the number of moles of copper and iron that would be produced in the reaction of iron and copper(II) chloride, the ratio of moles of iron to moles of copper, and the percent yield of copper produced. 2.00 grams of copper(II) chloride was added in the beaker to mix with 15 mL of distilled water. Then, three dry nails are placed in the copper(II) chloride solution for approximately 25 minutes. The three nails have to be scraped clean by sandpaper to make the surface of the nail shiny; if the nails are not clean, then some unknown substances might accidentally mix into the reaction and cause variations of the result.

Read More

Biology Unit 9

313 Words | 2 Pages

Elijah Brycth B. Jarlos IX-Argon 1. Multicellularity is a condition of an organism to have multicellular cells. An example of a organism who has multicellular cells are plants, animals, and humans. The main reason of why scientists have a hard time finding a good set of existing organisms to compare. Is neither the first set of organisms which is being compared is dying as fast as the second specimen is being examined or they just can’t find the right species.

Read More

Diffusion And Osmosis Lab Report

819 Words | 4 Pages

Diffusion and Osmosis Lab Report  By:  Jettica Williams  BIOL 1107 Lab  September 21, 2016  Prepared for Mrs. Fulford Lab Course  Page Break       The cell membrane act as a roadblock for cells.   The cell membrane has a very hectic job.   It restricts the access to what comes in and what goes out.   The bond the membrane shares with others is the idea of accountability.

Read More

Polyvinyl Chloride Lab Report

355 Words | 2 Pages

Polyvinyl chloride is obtained by chain polymerization. Double bonds of vinyl chloride monomer get opened up. Since monomers possess a double bond between two of their carbon atoms in their structures, those get activated in the presence of tiny concentrations of starters. In this way, double bonds get open and monomers react rapidly so they associate with each other by forming macromolecules chains. Polyvinyl chloride polymerization is a highly exothermic reaction, where a high amount of heat is broken away (1525 kJ/kg).

Read More

Resting Membrane Potential Lab Report

1566 Words | 7 Pages

RESTING MEMBRANE POTENTIAL When the neuron is not sending a signal at rest the membrane potential called as resting membrane potential. In this stage, permeability of K+ much greater than Na+ When a neuron is at rest, the inside of the neuron is negative relative to the outside. Although the concentrations of the different ions endeavor to balance out on both sides of the membrane, they cannot because the cell membrane sanctions only some ions to pass through channels (ion channels). At rest, potassium ions (K+) can cross through the membrane facilely. Additionally at rest, chloride ions (Cl-) and sodium ions (Na+) have a more arduous time crossing.

Read More

Henri Braconnot (Chitin)

967 Words | 4 Pages

γ-chitin is considered as variant of α-chitin with different packing and polarities of chitin sheets. α-chitin is the most abundant polymorph, it is found in shrimp shells, lobster and crabs tendons and shells, fungal and yeast cell walls and in insects cuticle. It is also found in or produced by various marine living organisms [6,9]. In addition, α-chitin can be prepared through results from recrystallization from solution, in vitro biosynthesis or enzymatic polymerization [18,19]. α-chitin is highly crystalline (displays orthorhombic crystals), with both intra and inter-sheet hydrogen bonding creating a tight network that interferes with the passage of solvent, these bonds involves the association of the hydroxyl-methyl groups of adjacent chains.

Read More

Aliphatic Polyester Research Paper

2087 Words | 9 Pages

et al., 2002) the key strategy to synthesize well-defined block copolymers. Anionic polymerization is characterized by having less termination and chain transfer reactions, carbanions (or, generally speaking, anionic sites) remain active after complete use of monomer, giving the possibility of block copolymer formation, within the simplest case, by introduction of your second monomer in the polymerization mixture giving potential for the preparation of linear block copolymers. For examples, AB diblock copolymers of styrene and isoprene or butadiene, with predictable composition and molecular weights in addition to narrow molecular weight have been synthesized by sequential addition of

Read More

Biological Membranes Lab Report

1621 Words | 7 Pages

The effects of alcohol on Biological Membranes. Introduction In this experiment it will be analysed the damage alcohols can have on biological membranes. Membranes are made up of lipids and proteins. Membranes usually help maintain the balance in a cell as it holds all the cellular materials.

Read More

Essay On Swelling

1284 Words | 6 Pages

3. Swelling Capacity Swelling is one of the distinctive physical properties of the gel copolymer, which is related to the ability to absorb water. The gel ability to absorb water is influenced by the present of free functional groups in the copolymer, such as -OH, -NH2, and -SO3H and can also be influenced by the environment, for example, the alteration in pH, temperature, and electrical current (Erizal et, al., 2002). Swelling properties that is possessed by this gel copolymer can be used as a determination of the swelling ability of the copolymer, which is based on the value of swelling ratio until the maximum limit gel to swells in particular immersion time.

Read More

More about Polymeric Membranes Lab Report

Related Topics

Open Document