Antioxidant activity of Australian tea tree (Melaleuca alternifolia) oil (TTO) was determined using two different assays. In the 2,2-diphenyl-1-picrylhydrazyl assay, 10 microL/mL crude TTO in methanol had approximately 80% free radical scavenging activity, and hexanal/hexanoic acid 200 exhibited 60% inhibitory against oxidation hexanal to hexanoic over 30 days. These results were equivalent antioxidant activities mM butylated hydroxytoluene both tests at same experimental conditions. This...

Green tea catechins (GTCs) as a mixture of (−)-epicatechin (EC), gallate (ECG), (−)-epigallocatechin (EGC), and (EGCG) possess variety biological activities. We have previously studied the stability GTCs either or individual epicatechin derivatives in various pH, demonstrating that alkaline solutions were extremely unstable degraded almost completely few minutes, whereas acidic (pH < 4) they very stable. For pH ranging from 4 to 7, was inversely associated with value incubation solutions....

The present study found that the supercritical fluid extract of "Guangchenpi" possessed in vitro antiviral activity against respiratory syncytial virus (RSV). Bioassay-guided isolation and identification this led to obtain five active polymethoxylated flavones (1-5). Cytopathic effect (CPE) reduction assay exhibited tangeretin (2) nobiletin (3), two major extract, better anti-RSV comparable positive control ribavirin. Plaque revealed dose-dependently inhibited RSV-induced plaque formation on...

Antioxidant capacities of vetiver (Vetiveria zizanioides) oil were evaluated by two different in vitro assays: the DPPH• free radical scavenging assay and Fe2+-metal chelating assay. Results showed that (VO) possessed a strong activity when compared to standard antioxidants such as butylated hydroxytoluene (BHT) α-tocopherol. However, its metal capacity was relatively weak. VO (10 μL/mL) dissolved methanol exhibited ∼93% ∼34% Fe2+ By contrast, 10 mM BHT 0.1 α-tocopherol 93 89% activities...

Distributions and seasonal variations of the key seafood flavor compounds including 2-bromophenol, 4-bromophenol, 2,4-dibromophenol, 2,6-dibromophenol, 2,4,6-tribromophenol in three species brown algae (Padina arborescens, Sargassum siliquastrum, Lobophora variegata) found Hong Kong waters were investigated. Bromophenols extracted by simultaneous steam distillation solvent extraction apparatus analyzed gas chromatography−mass spectrometry. On a dried weight basis, total bromophenol content...

Human respiratory syncytial virus (RSV) is a common pathogen that causes pneumonia and bronchiolitis in infants young children. Our previous study showed tangeretin from Citrus reticulate possessed potent vitro anti-RSV effects comparable to of ribavirin. Therefore, this study, we investigated the vivo activity 3-week-old male BALB/c mice. A plaque reduction assay fluorescence quantitative polymerase chain reaction (FQ-PCR) inhibited RSV replication lung Moreover, luminex indicated relieved...

Diet modification is a common compensation strategy to promote swallowing safety in patients with difficulties. The International Dysphagia Standardisation Initiative (IDDSI) guideline provides qualitative descriptions on texture-modified food and thickened liquid. This study aimed establish quantitative textural rheological data different IDDSI levels based Chinese ingredients dishes. Textural properties of 226 samples various textures 93 liquid consistencies were obtained using texture...

Volatile components of three commercial plain sufus or fermented soybean (Glycine max) curds (A-C) were extracted by a supercritical fluid extraction apparatus and analyzed gas chromatography-mass spectrometry. A total 83 compounds found, which 68 common among the samples. Samples A, B, C had 76, 75, 74 components, respectively. Alcohols (17), acids (15), esters (16) major classes. The rest classes miscellaneous (9), aldehydes (7), alkanes (5), aromatic ketones (3), furans (2), S-containing...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAroma Extract Dilution Analysis of Blue Crab Claw Meat VolatilesH. Y. Chung and K. R. CadwalladerCite this: J. Agric. Food Chem. 1994, 42, 12, 2867–2870Publication Date (Print):December 1, 1994Publication History Published online1 May 2002Published inissue 1 December 1994https://pubs.acs.org/doi/10.1021/jf00048a040https://doi.org/10.1021/jf00048a040research-articleACS PublicationsRequest reuse permissionsArticle Views559Altmetric-Citations80LEARN...

Abstract The present study shows that activation of the transient receptor potential vanilloid 3 channel (TRPV3) suppresses adipocyte differentiation. We also found a major functional catechin compound in green tea and cocoa, (−)-epicatechin, exerts antiadipogenic effects adipocytes through direct TRPV3. TRPV3 was detected 3T3-L1 using immunohistochemistry semiquantitative PCR. by activators (−)-epicatechin diphenylborinic anhydride determined live cell fluorescent Ca2+ imaging patch-clamp...

Abstract Salty taste is one of the five basic tastes and often elicited by NaCl. Because excess sodium intake associated with many health problems, it could be useful to have salt enhancers that are not based. In this study, regulation NaCl-induced responses was investigated in cultured human fungiform papillae (HBO) cells arginyl dipeptides: Ala-Arg (AR), Arg-Ala (RA), Arg-Pro (RP), Arg-Glu (RE), Glu-Arg (ER); two non-arginyl Asp-Asp (DD) Glu-Asp (ED). AR, RA, RP significantly increased...

Eudesmane-type sesquiterpenes are natural with anti-inflammatory properties, but their anti-angiogenic activities not known. The present study demonstrated that 5α-hydroxycostic acid and hydroxyisocostic acid, two eudesmane-type (ETSs), isolated from the herb Laggera alata, possessed effects. Under non-toxic dosage, ETSs suppressed VEGF‑induced proliferation in human umbilical vein endothelial cells (HUVECs) vessel formation zebrafish embryos. Moreover, inhibited VEGF-stimulated HUVEC...

Abstract Sufu (fermented soybean curd) is a cheese‐like product that widely consumed in Asian countries. One of the subtypes plain sufu, traditional fermented food whose sensory attributes remain poorly characterized. In this study, we developed lexicon for describing its characteristics. Trained panelists evaluated profiles 12 commercially available products manufactured 3 locations. Sensory data were analyzed using one‐way analysis variance and principal component analysis, 8 aroma, 7...

Volatile components of three commercial fermented soybean (Glycine max) curds (FSC) (A-C) were extracted using a simultaneous steam distillation and extraction apparatus, extracts analyzed by gas chromatography/mass spectrometry. A total 111 compounds was found. Sixty-three common to all brands. Brands A, B, C contained 90, 82 components, respectively. Major classes included alcohols (32) esters (25). Similarities differences existed in the composition FSC samples. Twelve including six...

ABSTRACT Volatile components in fresh‐picked blue crabmeat and processing byproduct were compared by simultaneous steam distillation‐solvent extraction/gas chromatography/mass spectrometry (SDE/GC/MS). Compounds identified (771 by‐product (80) of which 58 common to both. Some compounds 154) for the first time crab. Trimethylamine, four alkanes (C15–C17, C19), indole highest (&gt; 50 ng/g)) crabmeat, while trimethylamine, carbon disulfide, dimethyltrisulfide, two (C15 C17), geranylacetone,...

Selected seafood including rabbitfish (Siganus canaliculatus), brown-spotted grouper (Epinephelus areolatus), clam (Tapes philippinarum), oyster (Ostrea rivularis), shrimp (Penaeus japonicus), and crab (Charybdis feriatus), commonly found in the Hong Kong wet market, was monitored for their distribution seasonal variations of bromophenol contents. Specifically, 2-bromophenol (1). 4-bromophenol (2). 2,4-dibromophenol (3). 2,6-dibromophenol (4). 2,4,6-tribromophenol (5). were due to flavor...

Centipeda minima is a medicinal plant reputed in China as remedy for nasopharyngeal carcinoma (NPC). In this study, bioactivity-guided fractionation of the anti-NPC compound(s) from C. led to isolation 2beta-(isobutyryloxy)florilenalin (IF), sesquiterpene lactone. IF showed significant dose- and time- dependent inhibition on growth human epithelia cells (CNE). It induced apoptosis CNE cells, shown by accumulation sub-G1 cell population, DNA fragmentation nuclear condensation, caspase-3...