Rapid chemical analysis of bear bile: 5 minute separation and quantitation of bile acids using UHPLC–qTOF-MS

2014 ◽  
Vol 6 (2) ◽  
pp. 596-601 ◽  
Author(s):  
Xue Qiao ◽  
Wei Song ◽  
Xiong-hao Lin ◽  
Qi Wang ◽  
Tao Bo ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Bile Acids ◽  
Bear Bile

Studies on Bile Acids in Bear Bile*

1973 ◽  
Vol 74 (3) ◽  
pp. 489-495 ◽  
Author(s):  
Keiko KUROZUMI ◽  
Teruo HARANO ◽  
Kazumi YAMASAKI ◽  
Yoshikazu AYAKI
Keyword(s):  
Bile Acids ◽  
Bear Bile

Identification and quantitation of bile acids in bear bile by HPLC

2020 ◽  
Vol 8 (4) ◽  
Author(s):  
D.-L. Lin ◽  
H.-C. Chang ◽  
C.-Y. Chen
Keyword(s):  
Bile Acids ◽  
Bear Bile

ChemInform Abstract: Novel Bile Acids from Bear Bile Powder and Bile of Geese

ChemInform ◽  
2009 ◽  
Vol 40 (43) ◽  
Author(s):  
Dan Bi ◽  
Xing-Yun Chai ◽  
Yue-Lin Song ◽  
Yu Lei ◽  
Peng-Fei Tu
Keyword(s):  
Bile Acids ◽  
Bear Bile ◽  
Bear Bile Powder

scholarly journals Novel Bile Acids from Bear Bile Powder and Bile of Geese

2009 ◽  
Vol 57 (5) ◽  
pp. 528-531 ◽  
Author(s):  
Dan Bi ◽  
Xing-Yun Chai ◽  
Yue-Lin Song ◽  
Yu Lei ◽  
Peng-Fei Tu
Keyword(s):  
Bile Acids ◽  
Bear Bile ◽  
Bear Bile Powder

scholarly journals Bile acids and oxo-metabolites as markers of human faecal input in the ancient Pompeii ruins

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Emanuele Porru ◽  
Enrico Giorgi ◽  
Silvia Turroni ◽  
Riccardo Helg ◽  
Michele Silani ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Gut Microbiota ◽  
Bile Acids ◽  
Chemical Stability ◽  
Organic Molecules ◽  
Food Storage ◽  
Small Organic Molecules ◽  
Faecal Samples ◽  
Ecological Dimension ◽  
Ancient Remains

AbstractSmall organic molecules, lipids, proteins, and DNA fragments can remain stable over centuries. Powerful and sensitive chemical analysis can therefore be used to characterize ancient remains for classical archaeological studies. This bio-ecological dimension of archaeology can contribute knowledge about several aspects of ancient life, including social organization, daily habits, nutrition, and food storage. Faecal remains (i.e. coprolites) are particularly interesting in this regard, with scientists seeking to identify new faecal markers. Here, we report the analysis of faecal samples from modern-day humans and faecal samples from a discharge pit on the site of the ruins of ancient Pompeii. We propose that bile acids and their gut microbiota oxo-metabolites are the most specific steroid markers for detecting faecal inputs. This is due to their extreme chemical stability and their exclusive occurrence in vertebrate faeces, compared to other ubiquitous sterols and steroids.

Aspects of microanalysis in a transmission electron microscope

1978 ◽  
Vol 36 (1) ◽  
pp. 510-511
Author(s):  
R. Sinclair ◽  
B.E. Jacobson
Keyword(s):  
Grain Size ◽  
Electron Beam ◽  
Electron Microscope ◽  
Chemical Analysis ◽  
Transmission Electron Microscope ◽  
Vapor Deposition ◽  
Critical Currents ◽  
X Ray ◽  
Fine Grain ◽  
Transmission Electron

INTRODUCTIONThe prospect of performing chemical analysis of thin specimens at any desired level of resolution is particularly appealing to the materials scientist. Commercial TEM-based systems are now available which virtually provide this capability. The purpose of this contribution is to illustrate its application to problems which would have been intractable until recently, pointing out some current limitations.X-RAY ANALYSISIn an attempt to fabricate superconducting materials with high critical currents and temperature, thin Nb3Sn films have been prepared by electron beam vapor deposition [1]. Fine-grain size material is desirable which may be achieved by codeposition with small amounts of Al2O3 . Figure 1 shows the STEM microstructure, with large (∽ 200 Å dia) voids present at the grain boundaries. Higher quality TEM micrographs (e.g. fig. 2) reveal the presence of small voids within the grains which are absent in pure Nb3Sn prepared under identical conditions. The X-ray spectrum from large (∽ lμ dia) or small (∽100 Ǻ dia) areas within the grains indicates only small amounts of A1 (fig.3).

Integrated morphometrical and electron energy loss image analysis in cytochemistry

1989 ◽  
Vol 47 ◽  
pp. 402-403
Author(s):  
W.C. de Bruijn ◽  
A.A.W. de Jong ◽  
C.W.J. Sorber
Keyword(s):  
Image Analysis ◽  
Acid Phosphatase ◽  
Chemical Analysis ◽  
Active Form ◽  
List Type ◽  
Type Number ◽  
Enzyme Cytochemistry ◽  
Related Data ◽  
Endogenous Peroxidase ◽  
Electron Energy Loss

One aspect of enzyme cytochemistry is, whether all macrophage lysosomal hydrolytical enzymes are present in an active form, or are activated upon stimulation. Integrated morphometrical and chemical analysis has been chosen as a tool to illucidate that cytochemical problem. Mouse peritoneal resident macrophages have been used as a model for this complicated integration of morphometrical and element-related data. Only aldehyde-fixed cells were treated with three cytochemical reactions to detect different enzyme activities within one cell (for details see [1,2]). The enzyme-related precipitates anticipated to be differentiated, were:(1).lysosomal barium and sulphur from aryl sulphatase activity,(2).lysosomal cerium and phosphate from acid phosphatase activity and(3).platinum/di-amino-benzidine( D A B) complex from endogenous peroxidase activity.

Sign in / Sign up

Export Citation Format

Share Document