Research progress in analytical methods for iridoid glycosides in Gardeniae Fructus and pharmacokinetics

2019 ◽  
Vol 19 (2) ◽  
pp. 86-92
Author(s):  
Xuhui HE ◽  
◽  
Jun WEN ◽  
Tingting ZHOU
Keyword(s):  
Analytical Methods ◽  
Iridoid Glycosides ◽  
Research Progress

scholarly journals Methodologies in the Analysis of Phenolic Compounds in Roselle (Hibiscus sabdariffa L.): Composition, Biological Activity, and Beneficial Effects on Human Health

Horticulturae ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 35
Author(s):  
Bety W. Hapsari ◽  
Manikharda ◽  
Widiastuti Setyaningsih
Keyword(s):  
Biological Activity ◽  
Phenolic Compounds ◽  
Human Health ◽  
Analytical Methods ◽  
Environmental Influence ◽  
Biological Activities ◽  
Research Progress ◽  
Hibiscus Sabdariffa ◽  
Beneficial Effects ◽  
Positive Effects

Roselle (Hibiscus sabdariffa L.), as an edible flower, has long provided an array of positive effects on human health. This benefit is a result of phenolic compounds that are naturally present mainly in the calyx. Plentiful medicinal remedies and functional foods based on this flower are available worldwide, as supported by the studies of phenolic compounds in recent decades. This paper aims to provide a comprehensive review of the composition, biological activity, and beneficial effects on human health of phenolic compounds in roselle. This review was performed in accordance with the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines. A structured search in the published literature for phenolics compositions in roselle was required prior to the evaluation on the validity of the reported analytical methods. Reliable identification and quantification of phenolic compounds in roselle can be achieved by employing the proper extraction and separation methods. With ample alternative analytical methods discussed here, this review provided an aid for comprehending and selecting the most appropriate method for a particular study. The applications of the analytical methods highlighted indicated that phenolic acids, flavonoids, and their derivatives have been identified and quantified in roselle with a range of biological activities and beneficial effects on human health. It was also disclosed that the composition and concentration of phenolic compounds in roselle vary due to the growth factors, cultivars, and environmental influence. Finally, apart from the research progress carried out with roselle during the last ten years, this review also proposed relevant future works.

Konservat-Lagerstätten 40 Years On: The Exceptional Becomes Mainstream

2014 ◽  
Vol 20 ◽  
pp. 1-14
Author(s):  
Derek E. G. Briggs
Keyword(s):  
Soft Tissue ◽  
Analytical Methods ◽  
Molecular Data ◽  
Late Ordovician ◽  
Research Progress ◽  
Exceptional Preservation ◽  
Critical Data ◽  
History Of ◽  
Stratigraphic Ranges ◽  
Stratigraphic Range

Since Dolf Seilacher coined the term Konservat-Lagerstätten in 1970, these deposits have migrated from the margins to the mainstream of paleontological research. With greater understanding of the controls on their occurrence, new examples of exceptional preservation continue to be discovered. They provide critical data for phylogenies and stratigraphic ranges. Together with molecular data, they calibrate the history of many infrequently preserved taxa. Ostracods, tiny crustaceans with a biomineralized carapace, illustrate the importance of recent discoveries in Konservat-Lagerstätten. The rare examples with fossilized appendages are preserved in a diversity of ways, organically or through authigenic mineralization. They confirm that ostracods were present at least by the late Ordovician, provide evidence of relationships obscured by the morphology of the routinely preserved valves, and extend the stratigraphic range of particular groups. They reveal extraordinary features of the soft-tissue anatomy of ostracods, including reproductive morphology and strategy. While other taxa would provide equally compelling examples of research progress, it is clear that the concept of exceptional preservation is expanding. Future discoveries and new analytical methods will match the reconstruction of coloration in feathered dinosaurs, for example, for unexpected novelty.

Research Progress of Detection Method of Sulfur in Iron-Base Alloys

2014 ◽  
Vol 989-994 ◽  
pp. 2768-2773
Author(s):  
M.R. Bayati ◽  
Peng Yi Wei
Keyword(s):  
Analytical Methods ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Future Trend ◽  
Research Progress ◽  
Emission Spectrometry ◽  
Plasma Atomic Emission Spectrometry ◽  
Direct Reading ◽  
Chromatography Method ◽  
Iron Base

The paper summarizes the research progress of analytical method of sulfur element in iron-base alloys as of 2012. Major analytical methods for sulfur element in iron-base alloys include infrared absorption, photoelectric direct reading spectrometry, inductively coupled plasma atomic emission spectrometry, ion chromatography method, mass-spectrography, and electrochemical method. The paper also predicts the future trend of the analytical methods for sulfur element in iron-base alloys.

Stereo modeling of HVEM specimens by serial tilting and computer graphics

1986 ◽  
Vol 44 ◽  
pp. 34-35
Author(s):  
J.R. McIntosh ◽  
D.L. Stemple ◽  
William Bishop ◽  
G.W. Hannaway
Keyword(s):  
Computer Graphics ◽  
Analytical Methods ◽  
Photographic Film ◽  
Complex Structures ◽  
Multiple Objects ◽  
Multiple Images ◽  
3 Dimensional

EM specimens often contain 3-dimensional information that is lost during micrography on a single photographic film. Two images of one specimen at appropriate orientations give a stereo view, but complex structures composed of multiple objects of graded density that superimpose in each projection are often difficult to decipher in stereo. Several analytical methods for 3-D reconstruction from multiple images of a serially tilted specimen are available, but they are all time-consuming and computationally intense.

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