Low-molecular-weight poly(imide-amide)s obtained by copolycondensation of 4,4′-methylenedi(phenyl isocyanate), trimellitic anhydride and benzoic acid in N-methyl-2-pyrrolidone, 2. Structural defects observed by 1H and 13C NMR

1996 ◽  
Vol 197 (4) ◽  
pp. 1217-1232 ◽  
Author(s):  
Nathalie Sintès-Zydowicz ◽  
Quang Tho Pham ◽  
Philippe Michaud
Keyword(s):  
Molecular Weight ◽  
Benzoic Acid ◽  
13C Nmr ◽  
Phenyl Isocyanate ◽  
Structural Defects ◽  
Low Molecular Weight ◽  
Trimellitic Anhydride ◽  
1H And 13C Nmr ◽  
Poly Imide

scholarly journals Self-assembly and multifunctionality of peptide organogels: oil spill recovery, dye absorption and synthesis of conducting biomaterials

RSC Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 5220-5233 ◽  
Author(s):  
Monikha Chetia ◽  
Swapna Debnath ◽  
Sumit Chowdhury ◽  
Sunanda Chatterjee
Keyword(s):  
Molecular Weight ◽  
Benzoic Acid ◽  
Oil Spill ◽  
Self Assembly ◽  
The Self ◽  
Low Molecular Weight ◽  
Dye Absorption ◽  
Low Molecular Weight Gelator ◽  
Amino Benzoic Acid

The self-assembly of a series of low molecular weight gelator dipeptides containing para amino benzoic acid has been studied in mechanistic detail.

A family of low-molecular-weight organogelators based on long chain substituted benzoic acid hydrazides

2006 ◽  
Vol 124 (1-3) ◽  
pp. 32-36 ◽  
Author(s):  
Changhui Tan ◽  
Lihong Su ◽  
Ran Lu ◽  
Pengchong Xue ◽  
Chunyan Bao ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Benzoic Acid ◽  
Low Molecular Weight ◽  
Low Molecular Weight Organogelators ◽  
Long Chain

Synthesis and Characterization of Low Molecular Weight Organogelators Derived from Amide Derivatives of N-acetylglycine

2019 ◽  
Vol 41 (1) ◽  
pp. 99-99
Author(s):  
Firdous Imran Ali Firdous Imran Ali ◽  
Rabel Shaikh Rabel Shaikh ◽  
Ahmed Bari Ahmed Bari ◽  
Umair Ahmad Khan Umair Ahmad Khan ◽  
Shoaib Muhammad and Imran Ali Hashmi Shoaib Muhammad and Imran Ali Hashmi
Keyword(s):  
Phenyl Isocyanate ◽  
Hexamethylene Diisocyanate ◽  
Synthesis And Characterization ◽  
Low Molecular Weight ◽  
1H And 13C Nmr ◽  
Amide Derivatives ◽  
Polar Organic Solvents ◽  
Low Molecular Weight Organogelators ◽  
Derivatives Of

Six new N-acetylglycine amides and bisamides were prepared by reacting N-acetylglycine with different isocyanates including, hexamethylene diisocyanate, bis(4-isocyanatophenyl)methane, toluene 2,4-diisocyanate, 1,3-bis(2-isocyanatopropan-2-yl)benzene, phenyl isocyanate and 2-naphthyl isocyanate to furnish amides 1-6. The gelation ability of compounds (1-6) was investigated using fourteen different solvents including polar, non-polar organic solvents. Only compound 1 solidified toluene. Characterization of compounds (1-6) was done using spectroscopic methods, HRESI-MS, FTIR, 1H- and 13C-NMR. The morphology of toluene organogel (as xerogel) was determined through scanning electron microscopy (SEM).

scholarly journals A water-soluble high molecular weight substance isolated from Hyuganatsu orange (Citrus tamurana), suspected to be a polysaccharide, inhibits rat osteoclast cell formation

2015 ◽  
Vol 5 (6) ◽  
pp. 188 ◽  
Author(s):  
Hiroko Hata ◽  
Masatoshi Yamaguchi ◽  
Hiroshi Sameshima ◽  
Tsuyomu Ikenoue ◽  
Junko Matsubara ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Nmr Spectroscopy ◽  
13C Nmr ◽  
Active Substance ◽  
Chemical Structure ◽  
Weight Fraction ◽  
13C Nmr Spectroscopy ◽  
Water Soluble ◽  
Ir Absorption ◽  
1H And 13C Nmr

Background: Osteoporosis is detrimental to aged women’s health care. We previously reported that Hyuganatsu orange (Citrus Tamurana) contains active substances that inhibit osteoclast activities. Prior to conducting a human study, we sought to identify the biological active substance in the Hyuganatsu orange which suppresses osteoclast formation.Methods: We isolated five fractions from a Hyuganatsu orange extract according to molecular weight. Each fraction was tested to determine its suppressive effect on the formation of osteoclasts in rats. We also used high-performance liquid chromatography (HPLC), infra-red (IR), and 1H and 13C NMR spectroscopy to evaluate its chemical structure. Data was recorded as mean ± standard error of the mean. The Mann-Whitney test was used, and a p-value of <.05 was considered statistically significant.Results: The highest and lowest molecular weight fractions showed significant suppression activity on rat osteoclast formation (p < .05). The lowest molecular weight fraction was identified as hesperidin using thin layer chromatography. Additionally, IR absorption revealed that the highest molecular weight fraction was not a flavonoid. With regard to chemical structure, 1H and 13C NMR spectroscopy suggested that the highest molecular weight fraction had signals compatible with a polysaccharide such as galacturonic acid.Conclusions: Hyuganatsu orange contains a biological active substance other than hesperidin that may be a polysaccharide and may suppress osteoclast formation.Key Words: Citrus Tamurana, TRAP positive cell, Polysaccharides, Rat osteoclast cell, in vitro study

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