Characteristics of Konjac Glucomannan (KGM) in A.bulbifer Compared with that in A.rivieri and A.albus

2011 ◽  
Vol 236-238 ◽  
pp. 2045-2052 ◽  
Author(s):  
Qiao Wang ◽  
Jian Wang ◽  
Geng Zhong
Keyword(s):  
Chemical Structure ◽  
Average Molecular Weight ◽  
Konjac Glucomannan ◽  
Water Soluble ◽  
Soluble Dietary Fiber ◽  
Physiochemical Properties ◽  
Ft Ir ◽  
Main Component ◽  
Ft Ir Spectroscopy ◽  
Southwest Part

Amorphophallus bulbifer (A. bulbifer) is a promising species in Amorphophallus sp., with great potentiality of developing, low risk for cultivation and considerable commercial benefits, mainly locates in tropical and subtropical regions or near the equator. Konjac glucomannan (KGM) is the main component of Amorphophallus tuber which is a water-soluble dietary fiber. In this work, some physiochemical properties of KGM in three Amorphophallus species flour [one was A.bulbifer, the other two were current main species namely Amorphophallus rivieri (A. rivieri) and Amorphophallus albus (A. albus)] were studied and compared with each other. The KGM content in A. rivieri, A. albus and A. bulbifer flour were 85.03%, 76.28% and 88.07% (w/w), respectively. The apparent viscosity, viscosity average molecular weight, whiteness, gel-forming properties and chemical structure of KGM in the three flours were investigated by using viscometer, colorimeter, texture analyzer and Fourier transform infrared (FT-IR) spectroscopy. The results indicated that the viscosity and Mw of A. bulbifer was the largest, gel strength was almost same (p>0.05) and the molecular structure were of no differences of three KGM. It may be proposed that transplanting A. bulbifer from its native land in the tropical and subtropical regions to temperate zone in the southwest part of China would be feasible, and it would cause the revolution of Amorphophallus sp. and more considerable benefits.

Nano-Sized [60]Fullerene-Cyclodextrin Molecules

2001 ◽  
Vol 675 ◽  
Author(s):  
Jeong-Seo Park ◽  
Han-Chang Kang ◽  
Kurt E. Geckeler
Keyword(s):  
Biomedical Applications ◽  
Addition Reaction ◽  
Water Soluble ◽  
Separation And Purification ◽  
Subsequent Reaction ◽  
Fullerene Derivatives ◽  
Covalently Bonded ◽  
Scattering Measurements ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

ABSTRACTAs [60]fullerene is a very hydrophobic macromolecule, there have been a number of attempts to make it more hydrophilic for biomedical applications. By attaching hydrophilic moieties such as poly(oxyethylene)(POE) chains and cyclodextrin molecules to [60]fullerene, novel water-soluble and biocompatible materials have been successfully prepared [1,2].The synthesis of novel macrocyclic fullerene conjugates which are water-soluble is reported. The telechelic fullerene derivatives have been prepared via addition reaction of POE-based arms with covalently bonded β-cyclodextrin (CD) to [60]fullerene. To this end, a mono-tosylated CD derivative has been prepared in pyridine and then reacted with an amino-functional POE in the presence of triethylamine. The subsequent reaction of [60]fullerene with the hydrophilic POE-conjugated CD-derivative yielded the macrofullerene after separation and purification procedures.The macrocyclic [60]fullerene derivatives obtained were soluble in water and characterized by UV-VIS and FT-IR spectroscopy as well as light scattering measurements and thermogravimetric analysis.

scholarly journals Interleukin-1β and -6 release from immune cells by DOPA-based melanin as free pigment or complexed to carboxymethylcellulose

2017 ◽  
Author(s):  
Koen P. Vercruysse ◽  
Tonie S. Farris ◽  
Margaret M. Whalen
Keyword(s):  
Immune Cells ◽  
Broad Class ◽  
Water Soluble ◽  
Size Exclusion ◽  
Potent Effect ◽  
Pathological Conditions ◽  
Exclusion Chromatography ◽  
Ft Ir ◽  
Soluble Polysaccharide ◽  
Ft Ir Spectroscopy

AbstractWe have observed that many polysaccharides can promote the oxidation of 3,4-dihydroxyphenylalanine (DOPA) into melanin-like pigments leading to the formation of water-soluble polysaccharide/melanin complexes. These pigments were characterized by size exclusion chromatography and FT-IR spectroscopy. The effect on the secretion of interleukin (IL)-lβ and IL-6 from immune cells by DOPA-based melanin synthesized in the presence or absence of carboxymethylcellulose (CMC) was evaluated. We observed that the melanin/CMC complex had a more potent effect on both IL secretions compared to the melanin prepared from DOPA in the absence of any polysaccharide. The study of the effect of melanins on the IL secretion by immune or other cells will help illuminate the potential contributions of this broad class of pigments to pathological conditions like Parkinson’s disease or ochronosis.

scholarly journals Preparation and characterization of highly blue emitting fluorescent carbon nano-dots using Pongammia pinnata fresh leaves

2021 ◽  
Author(s):  
Govindaraju K ◽  
K. Vijai Anand ◽  
S. Muthamilselvan ◽  
M. Kannan ◽  
M. Elanchezhiyan
Keyword(s):  
Electron Microscopy ◽  
Water Soluble ◽  
Hydrothermal Technique ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Average Size ◽  
Soluble Carbon ◽  
Ft Ir Spectroscopy

Abstract In this study, a simple environmental benign approach have been adopted for the preparation of highly luminescent (blue emitting) water soluble carbon nano-dots using Pongammia pinnata (Pp) leaves via hydrothermal technique. The prepared Pp-carbon nano- dots were characterized using UV-vis spectroscopy, fluorescence spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM) and dynamic light scattering (DLS) measurements. The Pp-carbon nano-dots are spherical in shape with an average size of 32 nm.

Hybrid Collagen-NaCMC Matrices Loaded with Mefenamic Acid for Wound Healing

2017 ◽  
Vol 68 (11) ◽  
pp. 2605-2609 ◽  
Author(s):  
Cornelia Nitipir ◽  
Stefania Marin ◽  
Maria Minodora Marin ◽  
Madalina Albu Kaya ◽  
Mihaela Violeta Ghica ◽  
...  
Keyword(s):  
Mefenamic Acid ◽  
Enzymatic Degradation ◽  
Water Retention ◽  
Release Kinetics ◽  
Morphological Structure ◽  
Kinetics Studies ◽  
Swelling Capacity ◽  
Ft Ir ◽  
Main Component ◽  
Ft Ir Spectroscopy

Fire and burns represent the fourth cause of death in the world. Numerous options for dressings exist, but their selection should be based on several factors such as burn severity, wound location and water retention. Collagen (COLL) is the most common protein in the human body and, due to its biocompatibility, is the main component in biomaterials development. Mefenamic acid (MA) is a non-steroidal anti-inflammatory drug with analgesic properties, and carboxymethylcellulose (NaCMC) is a biocompatible and biodegradable polymer that is commonly used in biomedical field. Collagen - carboxymethylcellulose - mefenamic acid hydrogels, developed in order to be used in burn treatments were lyophilized and the corresponding spongious matrices were investigated by optical microscopy, FT-IR spectroscopy, water absorption, enzymatic degradation and drug release kinetics studies. All tests revealed proper morphological structure, favourable release patterns, convenient swelling capacity and degradation profiles, indicating the possibility of their use for medical applications.

A pyridinium modified β-cyclodextrin: an ionic supramolecular ligand for palladium acetate in C–C coupling reactions in water

2016 ◽  
Vol 18 (20) ◽  
pp. 5518-5528 ◽  
Author(s):  
Raihana Imran Khan ◽  
Kasi Pitchumani
Keyword(s):  
Mass Spectrometry ◽  
Light Scattering ◽  
Ir Spectroscopy ◽  
Water Soluble ◽  
Palladium Acetate ◽  
Coupling Reactions ◽  
Visible Spectroscopy ◽  
Ft Ir ◽  
Uv Visible ◽  
Ft Ir Spectroscopy

An ionic Pd(ii) complex stabilized by a water soluble pyridinium modified β-cyclodextrin was prepared and characterized by NMR, mass spectrometry, FT-IR spectroscopy, UV-visible spectroscopy and DLS (dynamic light scattering).

scholarly journals Chemical and Spectral Characterization of The Ozonation Products of κ-Carrageenan

2018 ◽  
Vol 156 ◽  
pp. 05006 ◽  
Author(s):  
Aji Prasetyaningrum ◽  
Bakti Jos ◽  
Yudhy Dharmawan ◽  
Ratih V. Octaviani ◽  
Ratnawati Ratnawati
Keyword(s):  
Chemical Structure ◽  
Biological Activities ◽  
Uv Spectra ◽  
Ozone Treatment ◽  
Ft Ir ◽  
Forced Air ◽  
Absorbance Peak ◽  
Ozonation Process ◽  
Ft Ir Spectroscopy

Kappa (κ-) carrageenan oligomers are known to have several biological activities. Recent progress in the development of modified κ-carrageenan has resulted low molecular of κ-carrageenan. Ozone is a powerful oxidant and considered for depolymerization of κ-carrageenan. However, few studies have investigated the changes in κ-carrageenan properties associated with ozone treatment. This study would investigate on the changes in chemical structure after ozonation process. The experiments were carried out in a glass reactor equipped with an ozone bubble diffuser. Ozone with concentration of 80 ± 2 was bubbled into the solution. The ozone treatment was conducted at different times, i.e., 0 (control), 5, 10, 15, and 20 minutes. The experiments were conducted at pH 7 and constant stirring speed (200 rpm). Ozone-treated κ-carrageenan was dried at 60 ºC for 24 h in a forced air oven. The chemical and spectral analyses of κ-carrageenan after ozonation process were carried out using UV-Vis and FT-IR spectroscopy. These changes are seen in the UV spectra as a high intensity of absorbance peak at 290 nm. It is shows that ozonation of κ-carrageenan leads to some chemical changes such as the formation of carbonyl, carboxyl or double bonds.The FT-IR spectra reveals that the chemical structure of degraded κ-carrageenan, in term of sulfate content, is only slightly affected by the ozone treatment.

New Anti-Aging and Anti-Wrinkle Material: Properties and Activities of Nanoparticle Containing Poly(Aspartic Acid) Derivatives

2019 ◽  
Vol 59 ◽  
pp. 57-76
Author(s):  
Hyo Gyeong Yu ◽  
Hong Geun Ji ◽  
Ju Duck Kim ◽  
Hye In Jang
Keyword(s):  
Aspartic Acid ◽  
Chemical Structure ◽  
Synthetic Polymer ◽  
Water Soluble ◽  
Skin Permeability ◽  
Collagenase Activity ◽  
H Nmr ◽  
Emulsifying Agent ◽  
Ft Ir ◽  
Alpha Amino Acid

Polymers such as sodium polyacrylate; polysaccharides in starch; polyamino acids, which are the products of alpha-amino acid condensation; and polypeptides are widely used in cosmetics and pharmaceuticals. They are used as viscosity agent, emulsifying agent, and carriers for drug delivery. However, we studied the function of polymers as activity agent, especially that of synthesized poly(aspartic acid). Poly(aspartic acid) is a biocompatible synthetic polymer. It is a water-soluble polyamide containing carboxylic pendants prepared from polysuccinimide, the polycondensate of aspartic acid monomer, by hydrolysis. In this study, we prepared poly(aspartic acid) derivatives conjugated with L-lysine or L-lysine and other materials. The chemical structure of these polymers was confirmed by FT-IR and 1H-NMR spectroscopy. Moreover, these novel poly(aspartic acid) derivatives stimulated typeⅠcollagen biosynthesis and inhibited MMP-1(collagenase) activity. We could conclude that the microfludization process improved skin permeability and confirmed better permeability than that achieved with existing nano emulsions.

scholarly journals Functional polyketones for the removal of calcium and magnesium from water (Part II): cross-linking and functional characterization

2017 ◽  
Vol 89 (1) ◽  
pp. 51-60 ◽  
Author(s):  
Patrick A. Figaroa ◽  
Henk Miedema ◽  
Gert-Jan Euverink ◽  
Francesco Picchioni
Keyword(s):  
Chemical Structure ◽  
Chemical Nature ◽  
Divalent Cations ◽  
Functional Characterization ◽  
Hard Water ◽  
Cross Link ◽  
Removal Capacity ◽  
Ft Ir ◽  
Capacity Performance ◽  
Ft Ir Spectroscopy

AbstractFunctional polyketones were chemically cross-linked for the softening of hard water, i.e. for the removal of the divalent cations Ca2+ and Mg2+. Elemental analysis, FT-IR spectroscopy, solubility- and swelling-experiments were used to demonstrate the occurrence of the cross-link reaction. Testing the different compounds for their Ca2+ and Mg2+ removal capacity assessed the structure-functionality of the polymers. The corresponding water-insoluble resins were then tested for their Ca2+ and Mg2+ removal capacity-performance being explained in terms of their chemical structure. Ion adsorption of these polymers is not based on an ion exchange, the prevailing mechanism for most currently existing adsorption resins. Rather, the amino functionalized polymers synthesized here adsorb cations as well as their accompanying anionic counterparts, possibly through a chelating mechanism. The obtained results show that functional polyketones are promising in this context as they are easily tunable with the chemical nature of the N-containing groups determining the affinity of the polymer for Ca2+ and/or Mg2+.

Synthesis and Characterization of the Water-Soluble Oleoyl Acetyl Chitosan

2011 ◽  
Vol 284-286 ◽  
pp. 1782-1785
Author(s):  
Wei Chang Ke ◽  
Yi Kun Chen ◽  
Guo Xi Xiong ◽  
Xiang Hong Peng ◽  
Chao Zhu ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Acetic Anhydride ◽  
Chemical Structure ◽  
Water Soluble ◽  
Synthesis And Characterization ◽  
Nmr Spectrum ◽  
Ft Ir ◽  
Oleoyl Chloride ◽  
C Nmr

Oleoyl chloride was synthesized by oleic acid and thionyl dichloride (SOCl2), and then reacted with chitosan in dichloromethane to obtain the oleoyl chitosan. Novel water-soluble oleoyl acetyl chitosan (OACh) was synthesized using oleoyl chloride reacted with acetic anhydride in pyridine. The chemical structure of the OACh was characterized by FT-IR, 1H and 13C NMR. There existed the peaks at 1743.9 cm-1 (C=O) and 1658.1 cm-1(C=C) in FT-IR spectrum, and the peaks at 170.8, 171.6 and 172.5 ppm which were assigned to the C=O of the oleoyl and acetyl groups in 13C NMR spectrum. The results indicated that OACh had oleoyl as hydrophobic moieties and acetyl as hydrophilic moieties.

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