scholarly journals 1H-NMR analysis of the sugar structures of glycoproteins as their pyridylamino derivatives

FEBS Letters ◽  
1986 ◽  
Vol 209 (2) ◽  
pp. 265-268 ◽  
Author(s):  
Satoshi Koyama ◽  
Hiromi Daiyasu ◽  
Sumihiro Hase ◽  
Yuji Kobayashu ◽  
Yoshimasa Kyogoki ◽  
...  
Keyword(s):  
1H Nmr ◽  
Nmr Analysis

Polyhydroxyalkanoate quantification in organic wastes and pure cultures using a single-step extraction and 1H NMR analysis

2012 ◽  
Vol 66 (5) ◽  
pp. 1000-1006 ◽  
Author(s):  
Elisabeth Linton ◽  
Asif Rahman ◽  
Sridhar Viamajala ◽  
Ronald C. Sims ◽  
Charles D. Miller
Keyword(s):  
1H Nmr ◽  
Azotobacter Vinelandii ◽  
Nile Blue ◽  
Agricultural Waste ◽  
Accurate Method ◽  
Single Step ◽  
Proton Nuclear Magnetic Resonance ◽  
Copolymer Composition ◽  
Nmr Analysis ◽  
Nmr Method

In this study, a proton nuclear magnetic resonance (1H NMR) method was developed to quantitatively analyze polyhydroxyalkanoate (PHA) content in Cupriavidus necator H16, Azotobacter vinelandii AvOP, and mixed microbial cultures from the effluent of an agricultural waste treatment anaerobic digester. In contrast to previous methods, a single-step PHA extractive method using deuterated chloroform was established, thereby facilitating direct 1H NMR analysis. The accuracy of the method was verified through comparison with well-established gas chromatography (GC) methanolysis techniques. Nile blue fluorescence staining was also carried out to serve as an independent and qualitative indicator of intracellular PHA content. The results indicate that the 1H NMR method is appropriate for rapid and non-destructive quantification of overall PHA content and determination of PHA copolymer composition in a variety of cultures. Notably, this technique was effective in measuring PHA content in full-strength waste samples where high concentrations of background impurities and organic compounds are present. The straightforward procedures minimize error-introducing steps, require less time and materials, and result in an accurate method suitable for routine analyses.

Iridium-Catalyzed Triborylation of 3-Substituted Indoles

2015 ◽  
Vol 68 (12) ◽  
pp. 1810 ◽  
Author(s):  
Andrew S. Eastabrook ◽  
Jonathan Sperry
Keyword(s):  
1H Nmr ◽  
Nmr Analysis ◽  
One Pot ◽  
Substitution Pattern ◽  
The Third

Readily available 3-substituted indoles undergo a one-pot iridium-catalyzed triborylation at the C2, C5, and C7 sites. 1H NMR analysis indicates borylation at C2 and C7 occurs first (no monoborylated product is observed), with the third borylation occurring as a separate, distinct step that is sterically directed to C5 by a combination of the substituent at C3 and the boronate at C7. The resulting tetrasubstituted indoles possess a substitution pattern that is cumbersome to prepare using existing methods.

Quantitative 1H NMR-analysis of technical octabrominated diphenylether DE-79™ and UV spectra of its components and photolytic transformation products

Chemosphere ◽  
2008 ◽  
Vol 73 (1) ◽  
pp. S44-S52 ◽  
Author(s):  
Ana-Maria Geller ◽  
Heinz-Ulrich Krüger ◽  
Qing Liu ◽  
Cornelius Zetzsch ◽  
Manfred Elend ◽  
...  
Keyword(s):  
1H Nmr ◽  
Transformation Products ◽  
Uv Spectra ◽  
Nmr Analysis

scholarly journals 1H NMR Analysis of Aromatic Polyamide in N-methyl-2-pyroridone Solution

2003 ◽  
Vol 60 (4) ◽  
pp. 186-191
Author(s):  
Hironori MATSUDA ◽  
Shizuo YAMASAKI ◽  
Tetsuo ASAKURA
Keyword(s):  
1H Nmr ◽  
Aromatic Polyamide ◽  
Nmr Analysis

Refining Universal Procedures for Ammonium Quantification via Rapid 1H NMR Analysis for Dinitrogen Reduction Studies

2020 ◽  
Vol 5 (3) ◽  
pp. 736-741 ◽  
Author(s):  
Rebecca Y. Hodgetts ◽  
Alexey S. Kiryutin ◽  
Peter Nichols ◽  
Hoang-Long Du ◽  
Jacinta M. Bakker ◽  
...  
Keyword(s):  
1H Nmr ◽  
Nmr Analysis ◽  
Dinitrogen Reduction

1H NMR analysis of some η6-(substituted aryl phenylsulfonylacetonitrile)-η5-cyclopentadienyliron cations

1994 ◽  
Vol 219 (1-2) ◽  
pp. 221-223 ◽  
Author(s):  
Alaa S. Abd-El-Aziz ◽  
Paul Hazendonk ◽  
Christine R. de Denus ◽  
Harold M. Hutton
Keyword(s):  
1H Nmr ◽  
Nmr Analysis

Chemical characterization of a prominent phosphomonoester resonance from mammalian brain. 31P and 1H NMR analysis at 4.7 and 14.1 tesla

1986 ◽  
Vol 67 (3) ◽  
pp. 443-450 ◽  
Author(s):  
J.W Pettegrew ◽  
S.J Kopp ◽  
J Dadok ◽  
N.J Minshew ◽  
J.M Feliksik ◽  
...  
Keyword(s):  
1H Nmr ◽  
Chemical Characterization ◽  
Mammalian Brain ◽  
Nmr Analysis

Quantitative 1H-NMR analysis of amniotic fluid

1993 ◽  
Vol 11 (8) ◽  
pp. 629-632 ◽  
Author(s):  
P.E. McGowan ◽  
J. Reglinski ◽  
R. Wilson ◽  
J.J. Walker ◽  
S. Wisdom ◽  
...  
Keyword(s):  
Amniotic Fluid ◽  
1H Nmr ◽  
Nmr Analysis

scholarly journals Evaluations of the Peroxidative Susceptibilities of Cod Liver Oils by a 1H NMR Analysis Strategy: Peroxidative Resistivity of a Natural Collagenous and Biogenic Amine-Rich Fermented Product

Nutrients ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 753
Author(s):  
Benita C. Percival ◽  
Angela Wann ◽  
Richard Zbasnik ◽  
Vicki Schlegel ◽  
Mark Edgar ◽  
...  
Keyword(s):  
1H Nmr ◽  
Biogenic Amine ◽  
Analytical Data ◽  
Cod Liver Oil ◽  
Nmr Analysis ◽  
Spectrophotometric Methods ◽  
Long Term Storage ◽  
Fermented Product ◽  
1H Nuclear Magnetic Resonance ◽  
Analysis Strategy

High-resolution 1H nuclear magnetic resonance (NMR) analysis was employed to molecularly screen the lipid, lipid oxidation product (LOP), and antioxidant compositions of four natural (unrefined) cod liver oil (CLO) products. Products 1–3 were non-fermented CLOs, whilst Product 4 was isolated from pre-fermented cod livers. Supporting analytical data that were acquired included biogenic amine, flavanone, tannin, phenolic antioxidant, α-tocopherol, and oxygen radical absorbance capacity (ORAC) determinations by recommended HPLC, LC/MS/MS, or spectrophotometric methods. SDS-PAGE, HPLC, and 1H NMR analyses investigated and determined collagenous antioxidants and their molecular mass ranges. 1H NMR analysis of aldehydic LOPs was employed to explore the susceptibilities/resistivities of each CLO product to peroxidation that is induced by thermal stressing episodes (TSEs) at 180°C, or following prolonged (42 day) storage episodes at 4 and 23 °C. Product 4 displayed extremely high ORAC values, which were much greater than those of Products 1–3, and that were predominantly ascribable to significant levels of peroxidation-blocking and/or aldehyde-consuming collagenous polypeptides/peptides and ammoniacal agents therein. Significantly lower levels of toxic aldehydes were generated in the pre-fermented Product 4 during exposure to TSEs, or the above long-term storage episodes. These results confirmed the enhanced peroxidative resistivity of a fermented, antioxidant-fortified natural CLO product over those of non-fermented unrefined products. Product 4: Green Pasture Blue Ice™ Fermented Cod Liver Oil.

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