Optimization of Chitin Extraction from Shrimp Shells

... increase of the intrinsic viscosity of chitin with time The phenomenon is Biomacromolecules, Vol 4, No 1, 2003 17 Optimization of Chitin Extraction Table Characterization of the Extracted Chitin ... supernatant and in the obtained chitin Results and Discussion The overall process for the preparation of shrimp chitin is given in Figure The raw shrimp shells contain about 20% of chitin and other components ... the critical steps Table Composition of Crude Shrimp Shells, Demineralized Shrimp Shells (24 h in HCl M), and Chitin (24 h in NaOH M) composition shrimp shells (wt %) water crude protein crude...

Optimization of chitin and chitosan extraction from by product from white leg shrimp (penaeus vannamei) industry in vietnam to improve its quality and efficiency

... recovering chitin and protein hydrolysates from white leg shrimp shells with pepsin In addition, the information relevent to kinetics of the process and the linkage between protein, minerals and chitin ... Chitin Figure 3.39: Proposed procedue for recovering chitin and protein from heads of white leg shrimp Chitin Figure 3.40: Proposed procedue for recovering chitin and protein from shells of white ... technology which were integrated by physical, enzymatic and chemical methods allowed to innovate the production of chitin and chitosan from by- products of the manufacturing white leg shrimp The procedues...

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Optimization of microwave, ultra sonic and supercritical carbon dioxide assisted extraction techniques for curcumin from curcuma longa

... ) % extraction of curcumin using acetone Fig Curcumin extraction by supercritical CO2 ( ) % Extraction of curcumin from curcuma powder using supercritical CO2 3.3 Ultra- sonic assisted extraction ... extraction (UAE) 3.4 Supercritical carbon dioxide extraction (SC CO2 E) 3.3.1 Effect of ultra- sonic irradiation Fig shows the effect of ultra- sonic irradiation on curcumin extraction from C longa rhizome ... rhizomes ( ) % Extraction of curcumin using ethanol from ethanol soaked curcuma powder, ( ) % extraction of curcumin using ethanol from water soaked curcuma powder and ( ) % extraction of curcumin...

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Báo cáo vật lý: "Immobilization of Dithizone onto Chitin Isolated from Prawn Seawater Shells (P. merguensis) and its Preliminary Study for the Adsorption of Cd(II) Ion" pdf

... onto Chitin 72 Free dithizone Chitin -dithizone Figure 3: IR spectra of (a) free dithizone and (b) dithizone- immobilized chitin The XRD spectra and their d-spacing data of free dithizone and dithizone- immobilized ... (ml), and m is the weight of the chitin or chitin -dithizone adsorbents The effect of adsorbent mass on the amount of adsorbed Cd(II) ion was investigated using the same procedure, but the weight of ... used for adsorption equilibrium experiments is provided for each pH used in the experiment Therefore the value of the adsorbed Cd(II) ions presented in Figure is purely from the adsorption of dithizone- immobilized...

EXTRACTION AND CHARACTERIZATION OF CHITIN FROM CRUSTACEANS

... typical of fi -chitin) The spectrum of chitin from Fusarium oxysporum was different from the rest Thus, the relative intensity of the bands between 2968 and 2850 cm-’ was different from those of the ... Meyers and K S Lee, Isolation and characterization of chitin from crawfish shell waste J Agric Food Chem 37, 575 (1989) P V Kamasatri and P V Prabhu, Preparation of chitin and glucosamine from ... reported by other authors’ and to that of chitin from Fusarium oxysporum and other fungi.” 3.2 Characterization of the chitin samples The physico-chemical properties of the chitin samples were studied...

Extraction and characterization of chitin and chitosan from marine sources in Arabian Gulf

... the a -chitin and b -chitin The differences in the IR spectra of chitin can be used to distinguish between a -chitin and b -chitin (i) Due to the different arrangement between a -chitin and b -chitin, ... surface of b -chitin appears less crystalline and different from a -chitin 3.3 Deacetylation of chitin 3.3.1 Preparation of chitosan To avoid long heating times, chitosan was prepared by chitin deacetylation ... shifted in a -chitin a -Chitin with a crystallinity of 89.4% produced chitosan with crystallinity indices of 37% under microwave heating (12 min) and 30% under traditional heating (8 h) b -Chitin with...

Tài liệu Báo cáo khoa học: "Extraction and Approximation of Numerical Attributes from the Web" pdf

... (e.g (Pantel and Pennacchiotti, 2006)) to reduce noise Some of the methods are suitable for retrieval of numerical attributes However, most of them not exploit the numerical nature of the attribute ... evaluation, since the nature of the data is different from that of the QA dataset Most of the questions asked over the Web target named entities like speciﬁc car brands, places and actors There is usually ... (e.g., the height of a person), while for others it is only the center of a distribution (e.g., the weight of a coffee cup) Questions with no trusted and exact answers were eliminated From the remaining...

Báo cáo khoa học: " The Development of Lexical Resources for Information Extraction from Text Combining Word Net and Dewey Decimal Classification" potx

... ambiguity in WordNet by combining its information with another source of information: the Dewey Decimal Classification (DDC) (Dewey, 1989) Reducing the lexical ambiguity in W o r d N e t The main ... greatly reduce the ambiguity implied by the use of WordNet by finding the correct set of field labels that cover all the WordNet hierarchy in an uniform way Therefore we can reduce the overhead ... those The presence of all the relevant terms should guarantee that the information in the text is never lost; inserting just the relevant terms allows to limit the development effort, and should...

Báo cáo khoa học: Optimization of conditions for the glycosyltransferase activity of penicillin-binding protein 1a from Thermotoga maritima ppt

... study of the full ectodomain of PBP1a from Thermotoga maritima (Tm -1a* ), extending our previous work on the GTase domain from this protein (Tm-GT1a*) [38] T maritima is a Gram-negative hyperthermophilic ... investigate the substrate specificity of the TPase reaction of Tm -1a* Fig Screening of conditions for GTase activity of CYMAL-4-purified Tm -1a* Tm -1a* (250 nM) was incubated in the presence of dansylated ... Class A PBP1a from Thermotoga maritima J Offant et al Purification of Tm-GT1a* and Tm -1a* For the purification of CYMAL-4-solubilized Tm -1a* , a L culture at a final attenuance at 600 nm of was spun...

extraction of liquid crystals from flat panel display devices using both liquid and supercritical carbon dioxide

... Demonstration of the disassembly of a defunct LCD Carbon dioxide extraction was carried out using a Thar Technologies SFE-500F-2-FMC System and liquid withdrawal carbon dioxide (99.9 %) The extraction ... for extraction of liquid crystals from defunct display devices with high efficiency MATERIALS AND METHODS A LCD (Figure 2A) device may be disassembled by removal of screws securing the back panel ... potential recovery of tonnes of liquid crystals with a market value of between 27 and 187 million dollars dependent on liquid crystal quality; 900 kg of indium and 8,000 tonnes of optical quality...

Báo cáo hóa học: " Thickness-dependent optimization of Er3+ light emission from silicon-rich silicon oxide thin films" pdf

... Thickness-dependent optimization of Er3 + light emission from silicon- rich silicon oxide thin films Nanoscale Research Letters 2011 6:395 Submit your manuscript to a journal and beneﬁt from: Convenient ... (2006) P Horak, WH Loh, AJ Kenyon, Modification of the Er3+ radiative lifetime from proximity to silicon nanoclusters in silicon- rich silicon oxide Opt Exp 17, 1906 (2009) S Cueff, C Labbé, J ... thickness) of emission, both from Sincs around 750 nm, and from Er ions around 1.5 μm (see inset), as a function of the annealing temperature (T a ) The influence of T a on the agglomeration of Si...

Báo cáo hóa học: " Research Article Extraction of 3D Information from Circular Array Measurements for Auralization with Wave Field Synthesis" ppt

... variables of the circular array θ R 3D INFORMATION IN CIRCULAR ARRAY DATA The coordinates, variables, and geometry used in the following are speciﬁed in Figure A circular microphone array with radius ... seen from (2) S(α, ϕ, θ) = SEPARATION AND RECONSTRUCTION In the previous section, it was shown that the arrival time curves of plane waves in 2D array data contain 3D information This information ... inversion of either the forward or the adjoint transform In the present work, the adjoint transform is chosen to be inverted We therefore denote the result of the forward transform as approximation of...

Báo cáo hóa học: " Algorithms for Blind Components Separation and Extraction from the Time-Frequency Distribution of Their Mixture" docx

... count the number of peaks in each slice (3) Evaluate the histogram of the obtained set of peaks numbers (4) Estimate the total number of the signal components as the argument of the maximum of the ... step of the iterative algorithm For this reason, at the end of the second phase, we end up with a number of components which is higher than the actual number of components in the signal Therefore, ... order to group the halves (or parts) of the actual components together This is performed in the third and last phase of the algorithm Algorithm gives the details of the second phase The classiﬁcation...

Báo cáo khoa học: "Optimization of the Agar-gel Method for Isolation of Migrating Ascaris suum Larvae From the Liver and Lungs of Pigs" pptx

... and standardize the agar-gel method for fast and reliable isolation of migrating A suum larvae from pig livers and lungs Materials and methods Experimental pigs Twenty-four crossbred Danish Landrace/Yorkshire/Duroc ... Watson 1973) The present results recommend a standardization of the agar-gel method for recovering of A suum larvae from pig livers and lungs This standard method includes a 60 sec blending of 800-1000 ... of larvae from the liver (Exp 3) and the lungs (Exp 5) following incubation of agar-gels for varying length of time (1, 2, 3, and 24 h) Table Impact of sedimentation time in incubation jars and...

extraction of essential oil from lemongrass using supercritical carbon dioxide

... Properties of Lemongrass Oil 32 Table 5: Physicochemical Properties of main components of essential oil 34 Table 6: Investigation of SC CO2 extraction of essential oil from lemongrass ... result of Lemongrass essential oil from steam distillation, stem 106 Figure 38: GC result of Lemongrass essential oil from steam distillation, leaf 106 Figure 39: GC results of essential oil from ... results of essential oil from Lemongrass, Leaves (RSM) 169 Appendix I: Analyses results of essential oil from Lemongrass, stems (RSM) 174 x Appendix J: Effects of extraction conditions on extraction...

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