biological activities of chitin and chitosan derivatives

... and investigation of biological activities of new bitriazolyl derivatives incorporating various heterocyclic rings responsible for biological activity in a single structure Experimental All of ... as sets at 7.96–8.36 ppm and 10.08–12.05 ppm were attributed to the -N=CH bond and –NH functions of cis- and trans-conformers, respectively The upfield lines of -N= CH and 2NH protons were attributed ... synthesis and antimicrobial activity screening studies of some new 1,2,4-triazole derivatives have been performed Results and discussion The synthetic route of the compounds is shown in Figures and

Ngày tải lên: 12/01/2022, 22:52

... pages of overview, 21 pages of research methods, 15 pages of experiment, 79 pages of result and discussions, pages of conclusions and recommendations, pages of publication list, and 12 pages of ... extraction process of fucoidan from the method of Bilan et al to study the structure and biological activity of fucoidans 4.2 Content of fucoidan and of some water soluble polysaccharides of 06 brown ... mud, sand and other substances and then air-dried at room temperature and milled to fine powder The samples used for extraction and purification of fucoidan 3.2 Extraction and purification of fucoidan

Ngày tải lên: 09/01/2020, 15:33

... MINISTRY OF VIETNAM ACADEMY OF EDUCATION AND TRAINING SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY FOR SCIENCE AND TECHNOLOGY - PHAM THI NINH STUDY ON CHEMICAL CONSTITUENTS AND BIOLOGICAL ... constituents and biological activities of Litsea glutinosa (Lour.) Rob (Lauraceae) and Lepisanthes rubiginosa (Roxb.) (Sapindaceae) in Vienam: Objective of the study in the thesis The samples of Litsea ... constituents and biological activities of species Lepisanthes rubiginosa (Roxb.) Leenh are investigated From a buthanol extract of this species, 11 compounds have been isolated and nine ones of them

Ngày tải lên: 10/01/2020, 06:54

... listed sampling data and taxonomy profiles of seaweed and seagrass samples in this study Evaluation of biological activities of some seaweed Table List of collected seaweed and seagrass samples ... Phuong Ly, Andrei B Imbs, Pham Quoc Long, 2019 Evaluation of biological activities of some seaweed and seagrass species in the coastal area of Vietnam Vietnam Journal of Marine Science and Technology, ... support of three grants: Grant of VAST.DAB.05/13–15, grant of VAST 06.06/17–18 and grant of NTD.11.GER/16 REFERENCES [1] Titlyanov, E A., Titlyanova, T V., and Pham, V H., 2012 Stocks and the use of

Ngày tải lên: 13/01/2020, 15:05

... pages of overview, 21 pages of research methods, 15 pages of experiment, 79 pages of result and discussions, pages of conclusions and recommendations, pages of publication list, and 12 pages of ... extraction process of fucoidan from the method of Bilan et al to study the structure and biological activity of fucoidans 4.2 Content of fucoidan and of some water soluble polysaccharides of 06 brown ... mud, sand and other substances and then air-dried at room temperature and milled to fine powder The samples used for extraction and purification of fucoidan 3.2 Extraction and purification of fucoidan

Ngày tải lên: 15/01/2020, 10:02

... MINISTRY OF VIETNAM ACADEMY OF EDUCATION AND TRAINING SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY FOR SCIENCE AND TECHNOLOGY - PHAM THI NINH STUDY ON CHEMICAL CONSTITUENTS AND BIOLOGICAL ... constituents and biological activities of Litsea glutinosa (Lour.) Rob (Lauraceae) and Lepisanthes rubiginosa (Roxb.) (Sapindaceae) in Vienam: Objective of the study in the thesis The samples of Litsea ... constituents and biological activities of species Lepisanthes rubiginosa (Roxb.) Leenh are investigated From a buthanol extract of this species, 11 compounds have been isolated and nine ones of them

Ngày tải lên: 17/01/2020, 06:58

... Journal (2017) 11:42 Page of 12 Fig. 2  Superimposition of the co-crystallized ligand (red) and the re-docked ligand (blue) inside the active site of 5JFO Fig. 3  2D interactions of compound 3i with ... 11:42 Scheme 1  Synthesis of the thiourea derivatives 3a–t Page of 12 Ghorab et al Chemistry Central Journal (2017) 11:42 Page of 12 Table 1 The inhibitory activities of? ? the synthesized compounds ... (MOE) software 10.2008 Docking protocol was verified by re-docking of the co-crystallized ligand in the binding pocket of the enzyme with energy score (S)  =  −10.44  kcal/mol and root mean standard

Ngày tải lên: 29/05/2020, 15:03

... Ayhan ULUBELEN4 Department of Pharmacognosy and Phytochemistry, Faculty of Pharmacy, ˙ Bezmialem Vakıf University, Istanbul, Turkey Department of Chemistry, Faculty of Arts and Sciences, Mu˘ gla University, ... of asymmetric synthesis 619 TOPC ¸ U et al./Turk J Chem menopausal problems and as a sedative and memory enhancer They exhibited antituberculosis, cytotoxic, and liver protective activities and ... such as in the treatment of some heart diseases, and as a liver protective and memory enhancer agent 8,13 In European folk medicine, particularly S officinalis and S lavandulaefolia have been used

Ngày tải lên: 12/01/2022, 22:48

... applied and this could be a promising route for the evaluation of biological activities of different functional foods depending of their content Results and discussion 2.1 Quantification of thymoquinone, ... terms of tocopherol, aliphatic alcohols, and thymoquinone content via HPLC and GC analysis Cell free antioxidant activities and total phenolic content of both oils were detected by DPPH assay and ... tocopherol, and aliphatic alcohols TQ, tocopherols, and aliphatic alcohols of the BCSO and WGO were analyzed by HPLC-DAD, HPLC-FLD, and GC-FID systems The quantitative results of the TQ, tocopherols, and

Ngày tải lên: 12/01/2022, 23:42

... www.mdpi.org/molecules Review Biological Activities of Hydrazone Derivatives Sevim Rollas* and Gỹniz Kỹỗỹkgỹzel Marmara University, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, ... as target structures and evaluated their biological activities These observations have been guiding for the development of new hydrazones that possess varied biological activities Keywords: Hydrazones, ... arthiritis, soft tissue and oral cavity lesions, respiratory tract infections and fever The two isoforms of cyclooxygenase (COX) are poorly distinguishable by most of the classical NSAIDs and these agents

Ngày tải lên: 01/11/2022, 08:55

... introduce the activities and benefits of squalene and related molecules to skin tissue, the largest organ of the human body Some important in vivo and clinical studies of squalene and its derivatives ... www.mdpi.com/journal/molecules Review Biological and Pharmacological Activities of Squalene and Related Compounds: Potential Uses in Cosmetic Dermatology Zih-Rou Huang 1, Yin-Ku Lin 2,3 and Jia-You Fang 1,* Pharmaceutics ... is one of the predominant components (about 13%) of sebum (Table 1) [5] Molecules 2009, 14 543 Figure Sectional view of the skin with sebaceous glands Sebaceous Glands Table Composition of sebum

Ngày tải lên: 19/11/2022, 11:49

... of glycosyltransferase regulation to the function of the adhesion molecules integrin and E-cadherin. Biological significance of GnT-III, GnT-V and Fut8 GnT-III GnT-III catalyzes the addition of ... the upregulation of GnT-III. In fact, the results of several studies suggest that E-cadherin can induce ligand-independent activation of EGFR and subse- quent activation of Rac1 and MAP kinase, ... membrane and mediate interactions with the cytoskeleton and with signaling molecules. On the basis of extensive searches of the human and mouse genomic sequences, it is now known that 18 a-subunits and

Ngày tải lên: 18/02/2014, 17:20

... respectively, the chitin and protein contents of head and shell are largely different The chitin content of shell and head of white shrimp were 27.37 and 11.40%, respectively The chitin content ... fishmeal and chitin were produced This way of treatment caused the recovery of useful compounds to be lost the efficiency and to pollute environment concurrently The industry of chitin and chitosan ... Germay) and has the frequency of 37kHz and RMS of 35W CHAPTER III: RESULTS AND DISCUSSION 3.1 Characteristics of the white leg shrimp by - product The mass average ratio of head and shell of shrimp...

Ngày tải lên: 15/08/2015, 22:14

... 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, amide I band in a -chitin spectrum splits ... organization and dense structure was observed clearly for a -chitin, whereas the surface of b -chitin appears less crystalline and different from a -chitin 3.3 Deacetylation of chitin 3.3.1 Preparation of chitosan ... electron microscopy (SEM) The surface morphology of chitin and chitosan was observed using SEM The dried sample of chitin and chitosan was ground and then coated with gold under vacuum using a...

Ngày tải lên: 25/08/2016, 11:21

... 20041 Chitin and chitosan 119 2040 11804 effects of the preparation process on the properties of chitin and chitosan and regulatory aspects The second part covers the main biological properties of ... configurations of Chitin (A)
-chitin, (B) ß -chitin and (C)  -Chitin known These are the heterogeneous deacetylation of solid chitin and the homogeneous deacetylation of pre-swollen chitin under ... levels of transfection Lavertu et al studied several combinations of Mw and DA of chitosan finding two combinations of high transfection efficiency using a chitosan of 10 kDa and DD of 92 and 80%,...

Ngày tải lên: 25/08/2016, 11:35

... mechanism of action of these new compounds nor tested activities on a wide range of RT or non-RT cell lines Here we tested the efficacy of 4-HPR and highly active halogen-substituted (5h and 5j) and ... 12, 13] Induction of apoptosis in rhabdoid tumor cells by 4-HPR and 4-HPR derivatives and peptidomimetics Though the nature of induction of cell-cycle arrest by 4-HPR and its derivatives varied ... ATRA, B 4-HPR, C and D 4-HPR derivatives, 5h (C) and 5j (D) E-G 4-HPR peptidomimetics, 11a (E), 11c (F), and 11d (G): Figure Inhibition of RT cell growth by 4-HPR and its derivatives and peptidomimetics:...

Ngày tải lên: 13/08/2014, 18:21

... OA of the mixed solution (*) with replacement 25µl of buffer B, instead of 25µl of samples OA2: the OA of the mixed solution (*) with replacement 50µl of buffer B, instead of 25µl of samples and ... Hz, H-10) and 6.01 (s, H-6) The splitting of signals and coupling constants of protons at δH 8.28, 7.01 and 6.94 demonstrated two ortho-coupled protons of H–1, H–2 and H–3 of the A ring and the ... and 25µl of 0.22 U/ml AChE OA3: the OA of the mixed solution (*) OA4: the OA of the mixed solution (*) with replacement 25µl of buffer B, instead of 25µl of 0.22 U/ml AChE Evaluation of the result...

Ngày tải lên: 24/08/2015, 12:40

... IR, MS and NMR spectra of PRAES-C1 146 Appendices 8-15: IR, MS and NMR spectra of PRAES-E14 149 Appendices 16-21: MS and NMR spectra of PRAES-C10 153 Appendices 22-26: MS and NMR spectra of PRAES-C11 ... correlations of PRAES-E1 and PRAES-T2 48 Figure 3.8 HMBC correlations of PRAES-E11, PRAES-T4 and PRAES-E2 52 Figure 3.9 HMBC and NOESY correlations of PRAES-C22 54 Figure 3.10 HMBC and NOESY correlations ... 62 Figure 3.14 HMBC and NOESY correlations of PRAES-C25 and PRAES-C26 63 xiv Figure 3.15 HMBC correlations of PRAES-C9 and PRAES-C7 67 Figure 3.16 COSY and HMBC correlations of PRAES-E18 70 Figure...

Ngày tải lên: 15/12/2015, 15:22

... compositions and biological activities of Annona glabra L So, the thesis’s title was proposed to be "Study on chemical compositions and biological activities of Annona glabra L." Subject and contents of ... spectrum of Figure 4.32 COSY spectrum of 4.2 Evaluation of biological activities Figure 4.29 DEPT spectrum of Figure 4.31 HMBC spectrum of Figure 4.33 NOESY spectrum of t 4.2.1 Cytotoxic activity of ... up-regulation of Bax, down-regulation of Bcl-2, cleaves of caspase-3, and cleaves of PARP These results indicated that compounds 18 and 22 induced apoptosis via alteration of expression of apoptosis-related...

Ngày tải lên: 28/04/2016, 17:48