scholarly journals Investigation of Quick and Simple Analysis Method by Fourier Transform Infrared Spectroscopy for Multiple Pesticides Residue Analysis

2017 ◽  
Vol 27 (4) ◽  
pp. 153-162
Author(s):  
Kazuki YAMAMOTO ◽  
Ayato KAWASHIMA ◽  
Akiko MUKAI ◽  
Noriaki HAMADA
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Residue Analysis ◽  
Analysis Method ◽  
Simple Analysis ◽  
Pesticides Residue

Residue Analysis of Cooking Vessels from Early Postclassic Xaltocan, Central Mexico

2021 ◽  
pp. 1-19
Author(s):  
Kristin De Lucia ◽  
Linda Scott Cummings
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Sixteenth Century ◽  
Fourier Transform Infrared Spectroscopy ◽  
Residue Analysis ◽  
Food Preparation ◽  
Central Mexico ◽  
Early Postclassic ◽  
Ceramic Vessels

This article examines the use of cooking vessels from Early Postclassic (AD 900–1250) Xaltocan, Mexico, through residue analysis of ceramic sherds. The analysis combined phytolith and starch analyses with Fourier transform infrared spectroscopy. Because our understanding of prehispanic foodways in central Mexico is based largely on sources that describe or depict Aztec practices in the sixteenth century, we ask how foods were similar or different prior to the Aztecs. We also seek a better understanding of how plainware vessels were used in prehispanic times. Although there is long-term continuity in the preparation of foods such as tamales and corn gruels, we find that additional foods such as tuber-based stews were prepared in the Early Postclassic. In addition, some ceramic vessels, such as comales and crude bowls, had a wider range of food preparation functions than expected.

Study on Analysis and Assessment of Acanthopanax senticosus from China and Korea with FT-IR

2012 ◽  
Vol 531 ◽  
pp. 520-523
Author(s):  
Bao Qing Wang
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Chinese Medicine ◽  
Traditional Chinese Medicine ◽  
Ir Spectra ◽  
Chemical Constituents ◽  
Analysis Method ◽  
Acanthopanax Senticosus ◽  
Ft Ir ◽  
Effective Analysis

To get the IR spectrums of Acanthopanax senticosus (AS) from china and korea areas, and to find out the characters of IR spectrums through the content of different chemical constituents, provide a fast and effective analysis method monitor the inherent qualities of traditional Chinese medicine-AS. Fourier transform infrared spectroscopy (FT-IR) was applied to detect sample of AS from china and korea areas. This study showed that the IR spectra of AS from china and korea areas have their unique IR fingerprint features. The content of syringin and calcium oxalate in AS from china is significantly higher AS from korea. So FT-IR is a very quick, effective and well repetitive method for monitoring and distinguishing the traditional Chinese medicine.

scholarly journals Synthesis of Anti-Fungals, from Chiral imidazolyl-imino and amino Compounds

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
A. M. Zaed, , M. Khlifa
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Candida Albicans ◽  
Infrared Spectroscopy ◽  
Reductive Amination ◽  
Moderate Activity ◽  
Analysis Method ◽  
Oxidation Reactions ◽  
New Compounds ◽  
Derivatives Of

This work describes the synthesis of novel nonracemic derivatives of imidazole. Some oxidation reactions using Mn(II), Se(II) and nitric acid were employed for the synthesis of the starting materials, imidazolyl carboxaldehydes in straightforward steps. These key step compounds were then subjected to schiff bases and reductive amination processes for the synthesis imidazolylimio and imidazolylamino compounds using standard conditions. Attempts to purify some imidazolylamino compounds using kugelrohr distillation technique have been unsuccessful. However, recrystallization from acetonitrile allowed isolation some compounds in good yields. The new compounds that were synthesised were potential ligands for complexation of metals. Ag(I) was used to synthesis of several metal complexes. These compounds were characterised by nuclear magnetic resonance (NMR) and fourier transform infrared spectroscopy (FTIR) as well as elemental analysis method. These imidazole derivatives have been screened for activity against Candida albicans. Although the S-enantiomer of N-[(1E)-1-benzyl imidazol-2-ylmethylene]-N′-(1-phenylethyl)amine was found inactive against C. albicans, the R-enantiomer showed moderate activity. However, in two instances the activity was greater than that for ketoconazole which is a common agent to cure candida infestation.

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