Systematic study on active compounds as antibacterial and antibiofilm agent in aging onions
Publication date: April 2018Source: Journal of Food and Drug Analysis, Volume 26, Issue 2Author(s): Kavita Sharma, Neelima Mahato, Yong Rok LeeAbstractQuantitative investigation and systematic studies of quercetin, total phenolics, flavonoids, antioxidants, antibacterial and antibiofilm or antibiofouling properties of methanolic extracts of onions obtained from six different varieties have been carried out to explore their relative merits in terms of biological activities of fresh and aging onions. Total phenolic content in the extracts was examined spectrophotometrically using Folin–Ciocalteau's phenol reagent and total...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Thyme essential oils from Spain: Aromatic profile ascertained by GC–MS, and their antioxidant, anti-lipoxygenase and antimicrobial activities
Publication date: April 2018Source: Journal of Food and Drug Analysis, Volume 26, Issue 2Author(s): Ana-Belen Cutillas, Alejandro Carrasco, Ramiro Martinez-Gutierrez, Virginia Tomas, Jose TudelaAbstractSix samples of red thyme (Thymus zygis) and two samples of winter thyme (Thymus hyemalis) essential oils (EOs) were obtained from plants cultivated in south-eastern Spain and extracted by steam distillation. Analysis by gas chromatography coupled with mass spectrometry detection provided the relative (%) and absolute (mM) concentrations. Thymol (30–54%), p-cymene (14–27%) and γ-terpinene (8–28%) were the most abundant...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Modifications of Atlantic salmon by-product oil for obtaining different ω-3 polyunsaturated fatty acids concentrates: An approach to comparative analysis
Publication date: April 2018Source: Journal of Food and Drug Analysis, Volume 26, Issue 2Author(s): Monjurul Haq, Seul-Ki Park, Min-Jung Kim, Yeon-Jin Cho, Byung-Soo ChunAbstractOmega-3 polyunsaturated fatty acids (ω-3 PUFAs) rich 2-monoacylglycerols (2-MAG), omega-3 polyunsaturated free fatty acids (ω-3 PUFFAs) concentrate, and PUFA enriched acylglycerols were prepared from salmon frame bone oil (SFBO) by enzymatic alcoholysis, urea complexation, and enzymatic esterification, respectively. The yields of 2-MAG, ω-3 PUFFAs concentrate, and PUFA enriched acylglycerols were 40.25, 16.52, and 15.65%, respectively. ω-3 PUFF...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Cytotoxic protobassic acid saponins from the kernels of Palaquium formosanum
Publication date: April 2018Source: Journal of Food and Drug Analysis, Volume 26, Issue 2Author(s): Hsin-Yi Chen, Ju-Fang Liu, Sheng-Fa Tsai, Yi-Li Lin, Shoei-Sheng LeeAbstractBioassay guided fractionation and separation of the EtOH extract of the kernels of Palaquium formosanum against PC-3 cells via Sephadex LH-20 and reverse phase C-18 columns led to the isolation of 13 protobassic saponins. One of these saponins is new and was characterized as 3‴-O-rhamnopyranosyl-arganin C, a bisdesmoside of 16α-hydroxyprotobassic acid at the C-3 and C-28 positions. The structures of these compounds were determined on the basis of...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Analysis of veterinary drug residue monitoring results for commercial livestock products in Taiwan between 2011 and 2015
Publication date: April 2018Source: Journal of Food and Drug Analysis, Volume 26, Issue 2Author(s): Hsin-Chun Lee, Chi-Min Chen, Jen-Ting Wei, Hsiu-Yi ChiuAbstractAntibiotics have been widely used in the treatment of livestock diseases. However, the emergence of issues related to drug resistance prompted governments to enact a series of laws regulating the use of antibiotics in livestock. Following control of the problem of drug resistant bacteria, public attention has shifted to the recurring incidence of human health and safety issues caused by residual veterinary drugs in livestock products. To guarantee the safety and ...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Use of UHPLC-TripleQ with synthetic standards to profile anti-inflammatory hydroxycinnamic acid amides in root barks and leaves of Lycium barbarum
In this study, we combined organic synthesis and UPHLC-TripleQ-MS/MS specifically targeting at HCAA species. The method was fully validated with respect to specificity, linearity, intra- and inter-day precision and accuracy, limit of detection (LOD), limit of quantification (LOQ), recovery, and reproducibility. We applied this method to identify and quantify HCAAs from the root barks and leaves of Lycium barbarum. HCAA species were reported in leaves for the first time, and 10 new HCAA species were further identified in root barks in addition to the ones reported in the literature. We also examine anti-inflammatory propert...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Employing natural reagents from turmeric and lime for acetic acid determination in vinegar sample
Publication date: April 2018Source: Journal of Food and Drug Analysis, Volume 26, Issue 2Author(s): Sam-ang Supharoek, Kraingkrai Ponhong, Watsaka Siriangkhawut, Kate GrudpanAbstractA simple, rapid and environmentally friendly sequential injection analysis system employing natural extract reagents was developed for the determination of acetic acid following an acid–base reaction in the presence of an indicator. Powdered lime and turmeric were utilized as the natural base and indicator, respectively. Mixing lime and turmeric produced an orange to reddish-brown color solution which absorbed the maximum wavelength at 455 n...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Antioxidant activity and calcium binding of isomeric hydroxybenzoates
Publication date: April 2018Source: Journal of Food and Drug Analysis, Volume 26, Issue 2Author(s): Zichen Zhao, Martina Vavrusova, Leif Horsfelt SkibstedAbstractThe association constant for calcium binding to hydroxybenzoates in aqueous 0.16 M NaCl at 25 °C was found electrochemically to have the value Kass = 280 mol L−1 with ΔHo = −51 kJ mol−1, ΔSo = −122 J mol−1 K−1 for the 2-isomer (salicylate), Kass = 7 mol L−1 with ΔHo = −39 kJ mol−1, ΔSo = −116 J mol−1 K−1 for the 3-isomer, and Kass = 8 mol L−1 with ΔHo = −51 kJ mol−1, ΔSo = −155 J mol−1Â...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Water-soluble polysaccharides from Ulva intestinalis: Molecular properties, structural elucidation and immunomodulatory activities
Publication date: April 2018Source: Journal of Food and Drug Analysis, Volume 26, Issue 2Author(s): Mehdi Tabarsa, SangGuan You, Elham Hashem Dabaghian, Utoomporn SurayotAbstractWater-soluble sulfated polysaccharides extracted from Ulva intestinalis and fractionated using DEAE Sepharose fast flow column to identify their molecular properties and macrophage cells stimulating activities. Crude and fractions (F1 and F2) were formed of neutral sugars (58.7–74.7%), sulfates (6.2–24.5%), uronic acids (4.9–5.9%) and proteins (3.2–10.4%). Different levels of sugar constituents including rhamnose (30.1–39.1%), glucose (39...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Relative content of gallic acid over 5-galloylquinic acid as an index for the baking intensity of oolong teas
Publication date: April 2018Source: Journal of Food and Drug Analysis, Volume 26, Issue 2Author(s): Miki Mei-Chi Wang, Yun Yeh, Yu-En Shih, Jason Tze-Cheng TzenAbstractPhenolic compounds in a series of old oolong teas prepared by baking annually were monitored and compared. The results showed that the relative content of gallic acid over 5-galloylquinic acid was subsequently elevated during this preparatory process. To reveal the effect was mainly resulted from baking or aging, two sets of oolong teas were collected and examined; one set was generated from fresh oolong tea via continually daily baking and the other set was...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Gallic acid inhibits bladder cancer cell proliferation and migration via regulating fatty acid synthase (FAS)
Publication date: April 2018Source: Journal of Food and Drug Analysis, Volume 26, Issue 2Author(s): Chung-Chia Liao, Shu-Chun Chen, Hui-Pei Huang, Chau-Jong WangAbstractBladder cancer is known as the world's ninth most prevalent cancer in 2012. New cytotoxic drugs have created considerable progress in the treatment. Gallic acid (GA) has been shown to inhibit carcinogenesis in animal models and various cancer cell lines. The aim of the present study was to evaluate the effect of GA on proliferation and migration inhibition of a bladder cancer cell line. The results showed that GA inhibited fatty acid synthase (FAS) activity...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Methodology for sample preparation and size measurement of commercial ZnO nanoparticles
This study discusses the strategies on sample preparation to acquire images with sufficient quality for size characterization by scanning electron microscope (SEM) using two commercial ZnO nanoparticles of different surface properties as a demonstration. The central idea is that micrometer sized aggregates of ZnO in powdered forms need to firstly be broken down to nanosized particles through an appropriate process to generate nanoparticle dispersion before being deposited on a flat surface for SEM observation. Analytical tools such as contact angle, dynamic light scattering and zeta potential have been utilized to optimize...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Modified QuEChERS method for 24 plant growth regulators in grapes using LC-MS/MS
Publication date: April 2018Source: Journal of Food and Drug Analysis, Volume 26, Issue 2Author(s): Chieh-Han Pu, Shao-Kai Lin, Wei-Chen Chuang, Tsyr-Horng ShyuAbstractA multiresidue analytical method was developed for grapes for the following 24 plant growth regulators: 1-naphthylacetamide, 2,3,5-triiodobenzoic acid, 2,4,5-T, 2-naphthoxyacetic acid, 3-indolylacetic acid, 4-(3-indolyl)-butyric acid, 4-chlorophenoxyacetic acid, 4-nitrophenol, 6-benzylaminopurine, N6-isopentenyladenine, butralin, chlormequat chloride, chlorphonim-Cl, cloprop, forchlorfenuron, gibberellic acid 3, gibberellic acid 4, gibberellic acid 7, inabe...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
Silver nanoparticle biosynthesis by using phenolic acids in rice husk extract as reducing agents and dispersants
Publication date: April 2018Source: Journal of Food and Drug Analysis, Volume 26, Issue 2Author(s): Yee-Shing Liu, Yung-Chung Chang, Hui-Huang ChenAbstractRice husk extract, obtained using acid and alkali pretreatment extraction (AAPE), contains bioactive compounds and exhibits reducing abilities. Phenolic composition in rice husk extract was analyzed and the mechanism of silver nanoparticle (AgNP) biosynthesis by using AAPE rice husk extract was investigated in this study. Stable and spherically shaped AgNPs with a size of <15Â nm were prepared under the following conditions: 0.001Â M AgNO3, AAPE rice husk extract dil...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
An investigation of the olive phenols activity as a natural medicine
In this study, the single components of the phenolic fraction of olive oil (1,4-hydroquinone, Semiquinone and 1,4-benzoquinone) have been studied as theoretical by using DFT (Density functional Theory). The behaviors of phenolic compounds of olive against to the alkyl peroxy radicals were investigated. Our data show that 1,4-benzoquinone is the best electron transfer agent in primary metabolic processes to human life. The frontier orbital gap, namely HOMO (highest occupied molecular orbital)–LUMO (lowest unoccupied molecular orbital) gap is the smallest for 1,4-benzoquinone. Hence, it is more stable than the others in bl...
Source: Journal of Food and Drug Analysis - July 11, 2018 Category: Food Science Source Type: research
