chitosan chitosan pva blend and pva films

... CS and Pure CA hollow fiber membranes and CS/CA blend hollow fiber membranes 0.5-26.5-OH and 1-26-OH 64 Figure 3.4 XRD diffractograms of CS and Pure CA hollow fiber membranes and CS/CA blend ... high hydrophilicity and good compatibility with chitosan Appropriate co-solvents to obtain chitosan and cellulose acetate blend was identified and the process to spin the blend hollow fiber membranes ... membranes 0.5-26.5-OH and 1-26-OH 66 Table 3.3 Pure water fluxes and water contact angles of CS and Pure CA hollow fiber membranes and CS/CA blend hollow fiber membranes 0.5-26.5-OH and 1-26-OH 70 Table...

Ngày tải lên: 14/09/2015, 11:42

... comparison of band absorbance Absence of a sharp and convoluted spectral band around 3600–3000 cm)1 in the spectra of both chitosan and LMWC indicated the absence of free -OH groups and the involvement ... magic angle at 6.2 kHz for native chitosan and kHz for LMWC and chito-oligomers + monomer A contact time of ms and a pulse repetition time of ms were used, and more than 2000 scans were accumulated ... spectrometer at 100 MHz and 27 °C Results and Discussion Characterization of chitosan The molecular mass of purified chitosan was 71 ± kDa as determined by both viscometry and GPC The solid-state...

Ngày tải lên: 19/02/2014, 12:20

... Chitin and Chitosan – Chitin and Chitosan in Life Science, edited by T Uragami, K Kurita and T Fukamizo (Kodansha Scientific Ltd, Tokoyo, Japan) 2001 Lim S & Hudson S M, Review of chitosan and its ... covers) and hair Chitin and chitosan are fungicidal and fungistatic in nature Chitosan is compatible with lots of biologically active components incorporated in cosmetic products composition Chitosan ... skin care, and oral care Chitosan and hair are complementary to each other owing to carry opposite electrical charges: chitosan positive and hair negative A clear solution that contains chitosan...

Ngày tải lên: 24/08/2016, 16:29

... into the electrolyte solution and an appropriate bias was applied to the system After the chosen deposition time the substrates were taken out of the solution and dried and tested for their hydrogen ... distance between the target and substrates was kept at 10 cm and the substrate was rotated at a uniform rate during the deposition The chamber was pumped down using a cryopump and ultra high pure argon ... controllers and record the gas concentration Results and Discussion Mechanism of electrochemical growth for the Pd nanoparticles has been studied using the voltammetry techniques and discussed...

Ngày tải lên: 22/06/2014, 00:20

... modes "High" and "low" are therefore less relevant as a description of a whole people, and more useful to describe and understand particular situations and environments 1.2.2 High and low context ... watched the films and discussed with her Vietnamese and American colleagues and friends who have already seen them + The author believes that the study of the American and Vietnamese films made ... chapters I and II are mostly based on the research by Vietnamese and international authors on silence/pauses and time-fillers Data are collected in some Vietnamese and American films and analyzed...

Ngày tải lên: 02/03/2015, 14:20

... language and culture, language and communication, cross-cultural communication, high-context and low-context culture, non-verbal communication and paralanguage Chapter Silence/pauses and Time-fillers ... pauses and time-fillers Then the notions of silence/ pause and time-filler definitions and usages are discussed Chapter Findings and Discussions The strategies of using silence/pauses and time-fillers ... Discussions The strategies of using silence/pauses and time-fillers are identified and major cross-cultural differences and similarities discussed Part III Conclusion, in which the main findings are...

Ngày tải lên: 10/08/2015, 19:46

... modes "High" and "low" are therefore less relevant as a description of a whole people, and more useful to describe and understand particular situations and environments 1.2.2 High and low context ... watched the films and discussed with her Vietnamese and American colleagues and friends who have already seen them + The author believes that the study of the American and Vietnamese films made ... chapters I and II are mostly based on the research by Vietnamese and international authors on silence/pauses and time-fillers Data are collected in some Vietnamese and American films and analyzed...

Ngày tải lên: 10/08/2015, 19:46

... characterization techniques such as SFA [Tabor and Winterton 1969 and Israelachvili and Tabor 1972] and AFM/LFM [Binnig et al 1986 and Mate et al 1987] and the advanced technical applications such ... Hassan, Kong Boon, Sandar and many others) I would like to thank all my friends Srinu, Sekhar, v Acknowledgements Mohan, Subhash, Ugandhar, Pardha, Rajan, Dr Bharath and Dr Venugopal and many others ... 2.4 Tribology of Polymer Films 30 2.5 Current Developments in Nanolubrication (or MEMS lubrication): Friction and wear durability data of L-B films, SAMs and polymer films 31 viii Table of Contents...

Ngày tải lên: 14/09/2015, 12:11

... and foam films by pulling on both outstanding older works and the latest achievements in the research of foams and other disperse systems (especially emulsions) and surface phenomena Understandably ... Functions of Organic Thin Films edited by T Kajiyama and M Aizawa Vol Foam and Foam Films Theory, Experiment, Application by D Exerowa and P.M Kruglyakov Vol Drops and Bubbles in Interfacial ... the Study of Foam Films Microscopic Thin Liquid Films 2.1.1 Thin Liquid Films: Microinterferometric Technique 2.1.2.Measuring cells for formation and study of microscopic foam films 2.1.3 Determination...

Ngày tải lên: 23/08/2016, 15:21

... at 40 °C overnight The free-standing GO -PVA thin films were then peeled off and collected The thickness of the GO -PVA films was measured using micrometer caliper and found to be 480 μm Figure ... fluency, exhibiting broadband optical limiting The Z-scan measurement on pure PVA film has also performed and compared with other GO -PVA films The results exhibit that pure PVA films have saturable ... free-standing AgNPs-PMMA films were peeled off and collected The thickness of the AgNPs-PMMA films was measured using micrometer caliper and found to be 100 μm The free-standing AuNPs-PMMA thin films...

Ngày tải lên: 30/09/2015, 10:11

... in anthocyanin and flavonoid contents between chitosan treatments Changes in total phenolics content of the peel of fruits coated with 1.0 and 2.0% chitosan and in Table Effects of chitosan coating ... in PPO and POD activities of the fruit peel coated with 1.0 and 2.0% chitosan and of peel from the TBZ-treated control during storage at 4°C are shown in Figs and 5, respectively PPO and POD ... the TBZ-treated control and chitosan treatments decreased slowly during the first 20 days of storage and then decreased more steeply Anthocyanin and flavonoid contents of chitosan treatments decreased...

Ngày tải lên: 18/05/2014, 20:10

... contributions Hou ZQ, Yi YF, and Zhang QQ conceived of the study and participated in the design of the study and performed the statistical analysis and drafted the manuscript Zhan CM and Jiang QW carried ... literatures reported that both FA and mPEG were loaded onto one kind of chitosan NPs simultaneously In this paper, we aim at conjugating both FA and mPEG to the surface of chitosan NPs in order to reach ... decanted, and the NPs were dispersed in M HCl for 12 h and then dialyzed against the distilled water until the pH near 7.0 in order to remove the excess NaBH4, STPP, and glutaraldehyde Preparations and...

Ngày tải lên: 20/06/2014, 22:20

... sugar Hence, chitosan was heated with glucose to form a Maillard reaction product Kanatt, Chander, and Sharma (2008) found that chitosan glucose complex (CGC), a modified form of chitosan prepared ... darkness at ± °C and 95% relative humidity (RH) 2.6 Total soluble solids and ascorbic acid content 2.2 Preparation of chitosan glucose complex (CGC) solutions and application of treatments Chitosan (deacetylated ... storage, the mushrooms coated with CGC and chitosan showed 2.41% and 2.71% weight loss, respectively, as compared to 3.71% and 3.13% weight loss in control and glucose-coated mushroom Mushroom...

Ngày tải lên: 28/06/2014, 11:20

... chitosan and no chemical bonding between chitosan and Fe3O4 was formed SEM, TEM and IR results are important because they evidenced the successful coating of Fe3O4 nanoparticles by chitosan and ... Morphology and particles of chitosan/ magnetite composite beads Balancing between high adsorption capacity (due to chitosan) and magnetic properties (due to Fe3O4) various molar ratios of chitosan/ ... concentration C0 and decreases with C0 As can be seen from Table 1, maximum adsorption capacities qmax are 63.33 and 52.55 mg/g and percentages of ion recovery % r are 90.47 and 75.07% for Pb(II) and Ni...

Ngày tải lên: 02/07/2014, 14:14

... 87–101, 2007 93 interactions Qi and Xu28 reported a similar interaction between lead sulfide and chitosan Two new bands at about 2918 and 619 cm–1 are also seen in the chitosan- copper sulfides spectra ... particles size26 and may be explained as due to the chitosan which contains amino-, hydroxyl- and ether functional groups that may be involved in and during the formation of copper sulfides Chitosan ... respective TEM micrographs and size distributions for copper sulfides synthesized (a–b) without chitosan and at different ratio of Cu2+ :chitosan (c–d) 1:2, (e–f) 1:10, and (g–h) 1:20 (continued)...

Ngày tải lên: 07/08/2014, 14:20

Ngày tải lên: 07/08/2014, 18:21

... transported in chitosan nanoparticles and expressed in the lung epithelium, pEGFP was complexed with chitosan nanoparticles and administered intranasally to BALB/c mice At 1, 3, and days thereafter, ... Preparation of Chitosan IFN-c pDNA Nanoparticles and Green Fluorescent Protein Test of Expression Mouse IFN-c cDNA was cloned in the mammalian expression vector pVAX (Invitrogen, San Diego, CA), and complexed ... (Invitrogen, San Diego, CA), and complexed with chitosan, as described previously.45 Briefly, plasmids in 25 mM Na2SO4 and chitosan (Vanson, Kong et al, Chitosan Interferon-c Nanogene Therapy for...

Ngày tải lên: 08/08/2014, 21:20

... of the two instruments Moreo- Figure Chemical structure of chitosan and modified chitosan Chemical structure of chitosan and modified chitosan Page of (page number not for citation purposes) Journal ... (curve c), and MCIOPs (curve d) IOPs exhibit strong bands in the low frequency region below 800 cm-1 due to the oxide skeleton The characteristic bands of modified chitosan, amide I, II, and III ... of (a) pure chitosan, (b) MC, (c) pure IOPs and FTIR spectra of (a) pure chitosan, (b) MC, (c) pure IOPs and (d) MC-IOPs superparamagnetic behaviour, as evidenced by zero coercivity and remanance...

Ngày tải lên: 11/08/2014, 00:22