Study on Microcrystalline Chitin Cinnamon Nanoemulsion

2014 ◽  
Vol 525 ◽  
pp. 53-57 ◽  
Author(s):  
Xiao Qing Peng ◽  
Min Jie Wei ◽  
Liang Wang ◽  
Li Peng Gu
Keyword(s):  
Crystal Structure ◽  
Acetic Acid ◽  
Hydrochloric Acid ◽  
Molecular Crystal ◽  
Room Temperature ◽  
Isopropyl Alcohol ◽  
Acetic Acid Solution ◽  
Conductivity Data ◽  
Cinnamon Oil ◽  
Emulsification Process

To improve the miscibility of cinnamon oil with water, this study uses microcrystalline chitin as the surfactant to prepare cinnamon oil nanoemulsion. Firstly, use isopropyl alcohol and concentrated phosphoric to act with chitin, disperse molecular crystal structure of chitin, and then use hydrochloric acid for decalcification, and prepare microcrystalline chitin through centrifugation, washing, freezing and drying. Dissolve it in acetic acid solution as emulsification, and dissolve cinnamon oil in anhydrous ethanol, and mix both of which to obtain emulsion by drops. Judge the emulsification process and results of microcrystalline chitin on cinnamon oil through conductivity data. The conductivity decreases gradually to 0 from 1.4μS·cm-1. At room temperature, the solution is aqueous liquid without stratification and precipitation, but has good stability.

Effects of solvents on the crystal structure of cross-linked lysozyme crystals

2018 ◽  
Vol 32 (19) ◽  
pp. 1840041
Author(s):  
Yohei Yamada ◽  
Shota Toyama ◽  
Tomoki Yabutani
Keyword(s):  
Crystal Structure ◽  
Acetic Acid ◽  
Hydrochloric Acid ◽  
Dimethyl Sulfoxide ◽  
Optical Microscopy ◽  
Immersion Test ◽  
X Ray ◽  
Lattice Constants ◽  
X Ray Crystallography ◽  
Lysozyme Crystals

The effects of solvents on the structural stability of cross-linked lysozyme crystals were investigated by an immersion test using alkaline (0.1 M ammonia [NH3] and 0.1 M sodium hydroxide [NaOH]), acidic (0.1 M acetic acid [CH3COOH] and 0.1 M hydrochloric acid [HCl]) and organic (50% [v/v] and undiluted ethanol, acetone, 2-propanol and dimethyl sulfoxide [DMSO]) solvents. The morphology and lattice constants were monitored by optical microscopy and X-ray crystallography. The cross-linked crystals exhibited good stability against NH3, CH3COOH, HCl, ethanol, acetone and 2-propanol. However, samples preserved in DMSO and NaOH were severely degraded.

Synthesis of Three Different Types of Chalcone Derivatives

2014 ◽  
Vol 1033-1034 ◽  
pp. 81-84
Author(s):  
He Ping Yan ◽  
Du Shu Huang ◽  
Ju Cheng Zhang ◽  
Rui Na Huang ◽  
You Wang Fu ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Hydrochloric Acid ◽  
Room Temperature ◽  
Glacial Acetic Acid ◽  
Chalcone Derivatives ◽  
Different Types ◽  
Naoh Solution

Three chalcone derivatives were synthesized by the reaction of acetophenone with dimethylamino benzaldehyde, vanillin, diphenyl formaldehyde, respectively. The results showed that: A yield of 80.4% was obtained by the reaction of acetophenone and dimethylamino benzaldehyde in ethanol as solvent, 10% NaOH solution as catalyst at room temperature. A yield of 25.0% was obtained by the reaction of acetophenone and vanillin in ethanol as solvent, a mixed glacial acetic acid and hydrochloric acid as the catalyst, adding 10% KOH solution for dehydration by heating after the reaction at room temperature. A yield of 76.3% was obtained by the reaction of acetophenone and diphenyl formaldehyde in ethanol as solvent, 10% NaOH solution as catalyst at room temperature. Acid was used as the appropriate catalyst when chalcone derivatives were synthesized by aldehyde with hydroxy.

scholarly journals Room-Temperature Mg-Ion Conduction Through Molecular Crystal Mg{N(SO2CF3)2}2(CH3OC5H9)2

2021 ◽  
Vol 9 ◽  
Author(s):  
Takaaki Ota ◽  
Shota Uchiyama ◽  
Keiichi Tsukada ◽  
Makoto Moriya
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Ionic Conductivity ◽  
Molecular Crystal ◽  
Solid Electrolytes ◽  
Room Temperature ◽  
Molecular Crystals ◽  
Transference Number ◽  
Ion Conducting ◽  
State Ionic

Molecular crystals have attracted increasing attention as a candidate for innovative solid electrolytes with solid-state Mg-ion conductivity. In this work, we synthesized a novel Mg-ion-conducting molecular crystal, Mg{N(SO2CF3)2}2(CH3OC5H9)2 (Mg(TFSA)2(CPME)2), composed of Mg bis(trifluoromethanesulfonyl)amide (Mg(TFSA)2) and cyclopentyl methyl ether (CPME) and elucidated its crystal structure. We found that the obtained Mg(TFSA)2(CPME)2 exhibits solid-state ionic conductivity at room temperature and a high Mg-ion transference number of 0.74. Contrastingly, most Mg-conductive inorganic solid electrolytes require heating above 150–300°C to exhibit ionic conductivity. These results further prove the suitability of molecular crystals as candidates for Mg-ion-conducting solid electrolytes.

CsPr2(CH3COO)7, ein caesiumarmes wasserfreies ternäres Caesium-Praseodym-Acetat / CsPr2(CH3COO)7, a Cesium Poor Anhydrous Ternary Cesium Praseodymium(III) Acetate

1993 ◽  
Vol 48 (7) ◽  
pp. 886-892 ◽  
Author(s):  
Adalbert Lossin ◽  
Gerd Meyer
Keyword(s):  
Crystal Structure ◽  
Acetic Acid ◽  
Acid Solution ◽  
Single Crystals ◽  
Acetic Acid Solution ◽  
Three Dimensional ◽  
Molar Ratio ◽  
Triclinic System ◽  
Dimensional Network ◽  
Oxygen Atoms

Single crystals of CsPr2(CH3COO)7 were obtained from an acetic acid solution of Pr(CH3COO)3 • H2O and Cs2CO3 in a molar ratio of 4:1 at 120°C. It crystallizes in the triclinic system, PĪ (no. 2), Z = 2, a = 1028.1(5), b = 1034.6(5), c = 1199.4(6) pm, α = 84.82(2), β = 67.07(3), γ = 76.01(2)°, Vm = 343.3(3) cm3/mol, R = 0.031, Rw = 0.027. The crystal structure contains infinite chains, 1∞[Pr2(CH3COO)6], running along the [110] direction. The chains are built up by bridging acetate ions coordinated to two crystallographically different Pr3+ ions which are both surrounded by 9 oxygen ligands. These chains are linked by “intercalated” Cs(CH3COO) to layers parallel (100). Cs+ has contacts to oxygen atoms of neighbouring layers, such that a three-dimensional network is formed.

Preparation and Properties of Copolymer of Methacrylic Acid and Acrylamide onto Degraded Chitosan Initiated by HRP/H2O2/ACAC

2011 ◽  
Vol 80-81 ◽  
pp. 396-399 ◽  
Author(s):  
Sheng Hua Lv ◽  
Xiao Liang Yan ◽  
Rui Jun Gao
Keyword(s):  
Antimicrobial Activity ◽  
Acetic Acid ◽  
Reaction Time ◽  
Hydrochloric Acid ◽  
Methacrylic Acid ◽  
Acetic Acid Solution ◽  
Leather Industry ◽  
Low Viscosity ◽  
Acid Reaction ◽  
Good Uniformity

The chitosan was degraded by hydrochloric acid and the effects of concentration of chitosan, amount of hydrochloric acid, reaction temperature and reaction time on the viscosity of chitosan were investigated. The results showed that the degraded chitosan with low viscosity could be prepared when chitosan (wt 6%) was dissolved in acetic acid solution and hydrochloric acid (wt 3%) at 90°C for 6 h to decrease the viscosity from 7.52 mPa·s to 2.48 mPa·s. Then, a graft copolymer was synthesized by copolymerization of degraded chitosan with methacrylic acid (MAA) and acrylamide (AAM) by using horseradish peroxidase (HRP)/H2O2/acetylacetone (ACAC) as initiator. The structures of original chitosan, degraded chitosan and the copolymer were characterized by FTIR. The copolymer was applied to the leather industry as an amphoteric retanning agent. The applied results showed that the retanned leather had the merits of good uniformity fullness softness, strong selecting filling properties, good dyeing ability and antimicrobial activity.

The nutrition of Zebu cattle Part II. The techniques of digestibility trials with special reference to sampling, preservation and drying of faeces

1961 ◽  
Vol 56 (1) ◽  
pp. 93-97 ◽  
Author(s):  
C. D. Juko ◽  
R. M. Bredon ◽  
B. Marshall
Keyword(s):  
Acetic Acid ◽  
Hydrochloric Acid ◽  
Special Reference ◽  
Nitrogen Content ◽  
Crude Protein ◽  
Dry Matter ◽  
Room Temperature ◽  
Zebu Cattle

Some techniques of sampling, preserving, drying and for determination of nitrogen content of faeces were investigated.It was found that any sample between 100 and 600 g., made up of 10 g. subsamples taken at random, is satisfactory.Untreated faeces and those preserved by the addition of acetic acid, hydrochloric acid or toluene were dried in a large oven at 80° C. and compared with untreated samples dried at 105° C. for 8 hr. Duplicate samples of those dried at 80° C. were exposed to room temperature for 7 hr. and then dried. When dry-matter and crude-protein contents were compared no significant differences were found between the three groups.

The chlorination of some 2,6-substituted 4-chlorophenols; X-ray crystal structure of (E)-(2RS,5RS)-2,4,5,6,6-Pentachloro-2-methyl-6-nitrohex-3-enoic acid

1984 ◽  
Vol 37 (9) ◽  
pp. 1963 ◽  
Author(s):  
MP Hartshorn ◽  
RJ Martyn ◽  
J Vaughan
Keyword(s):  
Crystal Structure ◽  
Acetic Acid ◽  
Hydrochloric Acid ◽  
Carboxylic Acids ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Enoic Acid ◽  
X Ray

Chlorination of 4-chloro-2-methyl-6-nitrophenol (4) with chlorine in acetic acid containing concentrated hydrochloric acid gives the epimeric acyclic carboxylic acids (6) and (7). The structure of compound (6) was determined by X-ray crystal structure analysis. No such acyclic compounds are formed in similar chlorinations of 2,4-dichloro-6-nitrophenol (13a) or 2,4-dichloro-6-methylphenol (13b). The mode of formation of compounds (6) and (7) is discussed.

scholarly journals Influence of Automatic Dishwashings and Scrubbings on Release of Lead from Glazed Ceramicware

1990 ◽  
Vol 73 (3) ◽  
pp. 401-404
Author(s):  
John H Gould ◽  
Susan C Hight ◽  
George H Alvarez ◽  
Catherine E Nelson ◽  
Stephen G Capar
Keyword(s):  
Acetic Acid ◽  
Acid Solution ◽  
Room Temperature ◽  
Acetic Acid Solution ◽  
Single Units ◽  
Lead Release

Abstract Use of lead glazes on ceramicware and the release of lead from finished glazes are reviewed. Single units of ceramicware with Initial lead leach levels from <0.1 to 470 /μg/mL were subjected to multiple automatic dishwashings with Intermediate scrubbing of the ware by plastic fiber pads. Ware was periodically leached with 4% acetic acid solution at room temperature for 24 h, and the solutions were analyzed for lead. Release of lead under these conditions Is discussed. Results Indicated that neither passive teachings nor multiple dishwashings and scrubbings can predict future lead-release characteristics of glazes and decorations.

scholarly journals Oxidative Chlorination of Various lodoarenes to (Dichloroiodo)arenes with Chromium(vi) Oxide as the Oxidant

1999 ◽  
Vol 23 (1) ◽  
pp. 64-65
Author(s):  
Pawet Kaźmierczak ◽  
Lech Skulski ◽  
Nicolas Obeid
Keyword(s):  
Acetic Acid ◽  
Hydrochloric Acid ◽  
Room Temperature ◽  
Efficient Procedure ◽  
Oxidative Chlorination ◽  
Chromium Vi

Chromium(VI) oxide dissolved in a mixture of acetic acid with concentrated hydrochloric acid converts, at or near room temperature, iodoarenes to (dichloroiodo)arenes, in a very simple and efficient procedure.

Sign in / Sign up

Export Citation Format

Share Document