Bioactive compounds content of chimarrão infusions related to the moisture of yerba maté (Ilex Paraguariensis) leaves

Background: Honey, pollen, and propolis are among the products that bees process and derive from plants and flowers. Propolis is a resinous material that bees gather from the buds and bark of some trees and small plants. Propolis from temperate climates mainly contains phenolic compounds, in contrast with propolis from tropical climates, which mainly contains terpenes. This study aimed to determine, characterise, and quantify the phenolic content of raw propolis from Burundi. Methods: In this study, a total of 6 samples were collected from the provinces of Rumonge, Cibitoke, and Ruyigi in Burundi. Fifteen phenolic compounds (caffeic acid, ferulic acid, epigallocatechin gallate, isoferulic acid, cinnamic acid, caffeic acid phenethyl ester, gallic acid, apigenin, chrysin, galangin, quercetin, kaempherol, rutin trihydrate, naringenin, and pinocembrin) were used as high-performance liquid chromatography (HPLC) standards for qualitative and quantitative analyses of the propolis samples. Results: Among the 15 phenolic compounds checked, only 1 – gallic acid – was detected at a measurable level using an HPLC-diode array detector system. Conclusion: In addition to terpenes, propolis found in sub-Saharan Africa may contain phenolic compounds. Further advanced investigation of sub-Saharan African propolis is required for more detailed characterisation.

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Determination and Quantification of Gallic Acid in Raw Propolis by High-performance Liquid Chromatography–Diode Array Detector in Burundi

East Africa Science ◽

10.24248/easci.v1i1.9 ◽

2019 ◽

Vol 1 (1) ◽

pp. 43-48

Author(s):

Ramadhan Nyandwi ◽

Ayşe S. Kılıç ◽

Meltem Çelik ◽

Hasan H. Oruç

Keyword(s):

High Performance Liquid Chromatography ◽

Liquid Chromatography ◽

Phenolic Compounds ◽

Gallic Acid ◽

Caffeic Acid ◽

High Performance ◽

Array Detector ◽

Diode Array ◽

Diode Array Detector ◽

Sub Saharan

Background: Honey, pollen, and propolis are among the products that bees process and derive from plants and flowers. Propolis is a resinous material that bees gather from the buds and bark of some trees and small plants. Propolis from temperate climates mainly contains phenolic compounds, in contrast with propolis from tropical climates, which mainly contains terpenes. This study aimed to determine, characterise, and quantify the phenolic content of raw propolis from Burundi. Methods: In this study, a total of 6 samples were collected from the provinces of Rumonge, Cibitoke, and Ruyigi in Burundi. Fifteen phenolic compounds (caffeic acid, ferulic acid, epigallocatechin gallate, isoferulic acid, cinnamic acid, caffeic acid phenethyl ester, gallic acid, apigenin, chrysin, galangin, quercetin, kaempherol, rutin trihydrate, naringenin, and pinocembrin) were used as high-performance liquid chromatography (HPLC) standards for qualitative and quantitative analyses of the propolis samples. Results: Among the 15 phenolic compounds checked, only 1 – gallic acid – was detected at a measurable level using an HPLC-diode array detector system. Conclusion: In addition to terpenes, propolis found in sub-Saharan Africa may contain phenolic compounds. Further advanced investigation of sub-Saharan African propolis is required for more detailed characterisation.

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Effects of moisture and temperature on pesticide stability in corn flour

Journal of the Serbian Chemical Society ◽

10.2298/jsc190622100l ◽

2020 ◽

Vol 85 (2) ◽

pp. 191-201

Author(s):

Yetong Liu ◽

Xu Qin ◽

Qiusheng Chen ◽

Qiang Zhang ◽

Ping Yin ◽

...

Keyword(s):

Moisture Content ◽

Half Life ◽

High Performance ◽

Degradation Rate ◽

Array Detector ◽

Diode Array ◽

Quechers Method ◽

Diode Array Detector ◽

Corn Flour ◽

Degradation Rates

Corn flour has been stored at different moisture content (without and with 10 % water) and temperatures (?20, 4 and 25 ?C). A modified quick, easy, cheap, effective, rugged and safe (QuEChERS) method was applied to determine the degradation rate of five common pesticides (imidacloprid, carbendazim, triadimefon, acetochlor and metolachlor) during the stored process using high-performance liquid chromatography with a diode array detector and gas chromatography with an electron capture detector. The results showed that there was almost no degradation on five pesticides at ?20?C in corn flour whether with or without water, and the half-life was 69.3?693.2 days. The degradation rate ranged from 1.7 to 7.8 % after ten days of application. Under 25?C and 10 % moisture content, the half-life was sharply reduced to 5.8?14.4 days. Under this condition, the degradation rate ranged from 40.6 to 68.4 % after ten days of application, and the sequence from high to low of the five pesticides. The degradation rates were as follows: carbendazim, imidacloprid, acetochlor, metolachlor and triadimefon. Therefore, low temperature and drying were beneficial to the storage of corn flour, but unfavorable to the degradation of pesticides in corn flour.

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Analysis of Four Pesticides, Isoproturon, Phenmedipham, Pyridate and Nitenpyram Residues by High-Performance Liquid Chromatography with Diode-Array Detector

Journal of the Korean Society of Food Science and Nutrition ◽

10.3746/jkfn.2010.39.8.1165 ◽

2010 ◽

Vol 39 (8) ◽

pp. 1165-1170 ◽

Cited By ~ 1

Keyword(s):

High Performance Liquid Chromatography ◽

Liquid Chromatography ◽

High Performance ◽

Array Detector ◽

Diode Array ◽

Diode Array Detector

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Analysis of the Mycosporine-Like Amino Acid (MAA) Pattern of the Salt Marsh Red Alga Bostrychia scorpioides

Marine Drugs ◽

10.3390/md19060321 ◽

2021 ◽

Vol 19 (6) ◽

pp. 321

Author(s):

Maria Orfanoudaki ◽

Anja Hartmann ◽

Julia Mayr ◽

Félix L. Figueroa ◽

Julia Vega ◽

...

Keyword(s):

Amino Acids ◽

High Performance Liquid Chromatography ◽

High Performance ◽

Red Alga ◽

Array Detector ◽

Diode Array ◽

Diode Array Detector ◽

The Past ◽

Specific Species

This study presents the validation of a high-performance liquid chromatography diode array detector (HPLC-DAD) method for the determination of different mycosporine-like amino acids (MAAs) in the red alga Bostrychia scorpioides. The investigated MAAs, named bostrychines, have only been found in this specific species so far. The developed HPLC-DAD method was successfully applied for the quantification of the major MAAs in Bostrychia scorpioides extracts, collected from four different countries in Europe showing only minor differences between the investigated samples. In the past, several Bostrychia spp. have been reported to include cryptic species, and in some cases such as B. calliptera, B. simpliciuscula, and B. moritziana, the polyphyly was supported by differences in their MAA composition. The uniformity in the MAA composition of the investigated B. scorpioides samples is in agreement with the reported monophyly of this Bostrychia sp.

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Graphene oxide-functionalized mesoporous silica for online in-tube solid-phase microextraction of polycyclic aromatic hydrocarbons from honey and detection by high performance liquid chromatography-diode array detector

Microchemical Journal ◽

10.1016/j.microc.2021.106263 ◽

2021 ◽

Vol 166 ◽

pp. 106263

Author(s):

Min Sun ◽

Sen Han ◽

Herman Maloko Loussala ◽

Juanjuan Feng ◽

Chunying Li ◽

...

Keyword(s):

High Performance Liquid Chromatography ◽

Aromatic Hydrocarbons ◽

Solid Phase Microextraction ◽

High Performance ◽

Solid Phase ◽

Array Detector ◽

Diode Array ◽

Diode Array Detector ◽

Functionalized Mesoporous Silica ◽

Polycyclic Aromatic

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Identification of ionic liquid components by RP-HPLC with diode array detector using chaotropic effect and perturbation technique

Journal of Separation Science ◽

10.1002/jssc.201100751 ◽

2012 ◽

Vol 35 (2) ◽

pp. 248-255 ◽

Cited By ~ 11

Author(s):

Jolanta Flieger ◽

Anna Czajkowska-Żelazko

Keyword(s):

Ionic Liquid ◽

Perturbation Technique ◽

Array Detector ◽

Diode Array ◽

Diode Array Detector ◽

Rp Hplc

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Clitorienolactones and Isoflavonoids of Clitorea ternatea Roots Alleviate Stress-Like Symptoms in a Reserpine-Induced Zebrafish Model

Molecules ◽

10.3390/molecules26144137 ◽

2021 ◽

Vol 26 (14) ◽

pp. 4137

Author(s):

Muhammad Afiq Ngadni ◽

Muhammad Tayyab Akhtar ◽

Intan Safinar Ismail ◽

Anis Irfan Norazhar ◽

Soo Yee Lee ◽

...

Keyword(s):

Mental Illnesses ◽

Array Detector ◽

Diode Array ◽

Root Extract ◽

Diode Array Detector ◽

Aqueous Methanol ◽

Zebrafish Model ◽

Metabolite Profiles ◽

Ultrahigh Performance Liquid Chromatography ◽

As Stress

Clitorea ternatea has been used in Ayurvedic medicine as a brain stimulant to treat mental illnesses and mental functional disorders. In this study, the metabolite profiles of crude C. ternatea root extract (CTRE), ethyl acetate (EA), and 50% aqueous methanol (50% MeOH) fractions were investigated using ultrahigh-performance liquid chromatography–diode array detector–tandem mass spectrometry (UHPLC–DAD–MS/MS), while their effect on the stress-like behavior of zebrafish, pharmacologically induced with reserpine, was investigated. A total of 32 compounds were putatively identified, among which, a series of norneolignans, clitorienolactones, and various flavonoids (flavone, flavonol, isoflavone, and isoflavanone) was found to comprise the major constituents, particularly in the EA and 50% MeOH fractions. The clitorienolactones, presently unique to the species, were present in both the free and glycosylated forms in the roots. Both the EA and 50% MeOH fractions displayed moderate effects on the stress-induced zebrafish model, significantly decreasing freezing duration and elevating the total distance travelled and average velocity, 72 h post-treatment. The results of the present study provide further evidence that the basis for the use of C. ternatea roots in traditional medicine to alleviate brain-related conditions, such as stress and depression, is attributable to the presence of clitorienolactones and the isoflavonoidal constituents.

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