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Syringic acid

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https://www.readbyqxmd.com/read/28738603/vortex-assisted-liquid-liquid-liquid-microextraction-followed-by-high-performance-liquid-chromatography-for-the-simultaneous-determination-of-fourteen-phenolic-acids-in-honey-iced-tea-and-canned-coffee-drinks
#1
Marwan Shalash, Ahmad Makahleh, Salizawati Muhamad Salhimi, Bahruddin Saad
A vortex-assisted liquid-liquid-liquid microextraction method followed by high performance liquid chromatography-diode array detection for the determination of fourteen phenolic acids (cinnamic, m-coumaric, chlorogenic, syringic, ferulic, o-coumaric, p-coumaric, vanillic, p-hydroxybenzoic, caffeic, 2, 4-dihydroxybenzoic, sinapic, gentisic and gallic acids) in honey, iced tea and canned coffee drink samples has been developed. The separation was achieved using a Poroshell 120-EC-C18 column under a gradient elution at a flow rate of 0...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28737734/storage-of-fruits-and-vegetables-in-refrigerator-increases-their-phenolic-acids-but-decreases-the-total-phenolics-anthocyanins-and-vitamin-c-with-subsequent-loss-of-their-antioxidant-capacity
#2
Joseph H Y Galani, Jalpesh S Patel, Nilesh J Patel, Jayant G Talati
It is of paramount importance for consumers, scientists and industrialists to understand how low-temperature storage of food items affects their bioactive compounds and properties. This study evaluated the effects of cold storage on total phenolics (TP), phenolic acids profile (PA), total anthocyanins (TA), total ascorbic acid (Vit. C) and antioxidant activity (AA) of 19 fruits and vegetables, collected from local Indian markets and stored in refrigerator (4 °C) during 15 days. Content of TP was highest in dill and amaranth and decreased (up to 29...
July 24, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28726351/correction-of-horizontal-neck-lines-our-preliminary-experience-with-hyaluronic-acid-fillers
#3
Soo-Keun Lee, Hei Sung Kim
BACKGROUND: There is an increasing trend shifting the esthetic focus downward from the face with a significant number of new treatments aimed at the aging neck. Hyaluronic acid (HA) filler injection is widely performed into the horizontal neck lines in Korea, but there are few reports assessing its effectiveness. OBJECTIVE: We aimed to evaluate the efficacy and safety of HA filler injection in the treatment of horizontal neck lines. PATIENTS AND METHODS: A retrospective chart review was performed on cases of horizontal neck lines treated with HA fillers...
July 20, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28720969/quantification-of-phenolics-in-syzygium-cumini-seed-and-their-modulatory-role-on-tertiary-butyl-hydrogen-peroxide-induced-oxidative-stress-in-h9c2-cell-lines-and-key-enzymes-in-cardioprotection
#4
H P Syama, A D Arya, R Dhanya, P Nisha, A Sundaresan, E Jacob, P Jayamurthy
The study quantified the major phenolics in different fractions of Syzygium cumini seeds and evaluated their cardioprotective efficacy. Gallic acid, ellagic acid, cinnamic acid, quercetin, syringic acid and ferulic acid were the major polyphenols present in different fractions of Syzygium cumini seeds. The cardioprotective effect of Syzygium cumini seed fractions in modulating angiotensin converting enzyme (ACE), HMG-CoA reductase, LDL oxidation and tertiary butyl hydrogen peroxide (TBHP) induced oxidative stress in H9c2 cardiac cell lines were investigated...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720956/influence-of-sodium-chloride-and-vacuum-impregnation-on-the-quality-and-bioactive-compounds-of-parboiled-glutinous-rice
#5
Patiwit Loypimai, Kulab Sittisuanjik, Anuchita Moongngarm, Wilawan Pimthong
This study investigated the effect of NaCl (2 and 4% (w/v)) and vacuum impregnation (VI) (150, 200, 250, and 300 Pa) on the quality parameters (water uptake, elongation ratio, visual color, and texture), tocols, γ-oryzanol and phenolic compounds of parboiled rice. Parboiling with NaCl and VI resulted in increased lightness and higher concentrations of bioactive compounds than rice parboiled by the traditional method. The highest concentration of tocopherols, γ-oryzanol, and phenolic acids (syringic, and ferulic acids) were obtained from parboiled rice with NaCl concentration at 2% (w/v) and VI at 250 and 300 Pa...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28697431/phytotoxicity-assessment-of-olive-mill-solid-wastes-and-the-influence-of-phenolic-compounds
#6
Inês A Pinho, Daniela V Lopes, Rui C Martins, Margarida J Quina
The main objective of this work is to evaluate the phytotoxicity of olive mill solid wastes (OMW) produced in two different centrifugation technologies and also the toxicity associated with specific phenolic compounds. Two samples of waste were collected in two-phase (2P-OMW) and three-phase (3P-OMW) centrifugation olive oil production processes, and cress bioassays with Lepidium sativum L. were employed to evaluate phytotoxicity. Although both OMW have similar total phenolic content (TPh), results confirmed that 2P-OMW is more phytotoxic than 3P-OMW...
July 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28692870/air-assisted-liquid-liquid-microextraction-using-floating-organic-droplet-solidification-for-simultaneous-extraction-and-spectrophotometric-determination-of-some-drugs-in-biological-samples-through-chemometrics-methods
#7
Farnaz Farahmand, Bahar Ghasemzadeh, Abdolhossein Naseri
An air assisted liquid-liquid microextraction by applying the solidification of a floating organic droplet method (AALLME-SFOD) coupled with a multivariate calibration method, namely partial least squares (PLS), was introduced for the fast and easy determination of Atenolol (ATE), Propanolol (PRO) and Carvedilol (CAR) in biological samples via a spectrophotometric approach. The analytes would be extracted from neutral aqueous solution into 1-dodecanol as an organic solvent, using AALLME. In this approach a low-density solvent with a melting point close to room temperature was applied as the extraction solvent...
July 3, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28683063/shear-thinning-and-self-healing-hydrogels-as-injectable-therapeutics-and-for-3d-printing
#8
Claudia Loebel, Christopher B Rodell, Minna H Chen, Jason A Burdick
The design of injectable hydrogel systems addresses the growing demand for minimally invasive approaches for local and sustained delivery of therapeutics. We developed a class of hyaluronic acid (HA) hydrogels that form through noncovalent guest-host interactions, undergo disassembly (shear-thinning) when injected through a syringe and then reassemble within seconds (self-healing) when shear forces are removed. Its unique properties enable the use of this hydrogel system for numerous applications, such as injection in vivo (including with cells and therapeutic molecules) or as a 'bioink' in 3D-printing applications...
August 2017: Nature Protocols
https://www.readbyqxmd.com/read/28681119/antiosteoporotic-activity-of-a-syringic-acid-diet-in-ovariectomized-mice
#9
Teruyoshi Tanaka, Nobuhisa Kawaguchi, Nobuhiro Zaima, Tatsuya Moriyama, Yasuhisa Fukuta, Norifumi Shirasaka
In recent years, the number of patients with osteoporosis has risen with the increase in average longevity. Therefore, the chemoprevention of osteoporosis using food materials or food components has become an increasingly important target. Syringic acid (SA) is a phenolic compound present in the fruit of the açaí palm Euterpe oleracea and the mycelium of the shiitake mushroom Lentinula edodes. This compound has no affinity for estrogen receptors and is potentially useful for disease prevention. However, little is known about the effects of a SA diet on bone metabolism, particularly bone resorption in vivo...
July 5, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/28678960/aqueous-extract-of-psidium-guajava-leaves-phenolic-compounds-and-inhibitory-potential-on-digestive-enzymes
#10
Anderson A Simão, Tamara R Marques, Silvana Marcussi, Angelita D Corrêa
Leaves of Psidium guajava L. (guava) have been widely used in the popular way for prevention and treatment of various diseases. Thus, the objective of this study was to evaluate the inhibitory potential of leaves aqueous extract from three cultivars of P. guajava (Pedro Sato, Paluma and Século XXI) on α-amylase, α-glycosidase, lipase, and trypsin enzymes, in the presence or not of simulated gastric fluid and to determine the content of phenolic compounds by high performance liquid chromatography. All cultivars presented the same composition in phenolic compounds, but in different proportions...
June 29, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28671029/chemopreventive-effect-of-syringic-acid-on-7-12-dimethylbenz-a-anthracene-induced-hamster-buccal-pouch-carcinogenesis
#11
Velu Periyannan, Veerasamy Vinothkumar, Sukumar Babukumar, Ramachandhiran Duraisamy
Oral squamous cell carcinoma is most prevalent and refractory cancers worldwide. Recently chemoprevention could be a promising approach in developing countries. The present study investigates the mechanism of syringic acid (SA), a phenolic constituent of plant Alpiniacalcarata Roscoe the leaves used, traditional Indian Ayurveda medicines, mediated chemoprevention on 7,12-dimethylbenz(a)anthracene (DMBA) induced hamster buccal pouch carcinogenesis (HBPC). Lipid peroxidation and antioxidants were measured in the plasma and buccal tissues in experimental hamsters...
July 3, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28657207/screening-of-polish-fir-honeydew-honey-using-gc-ms-hplc-dad-and-physical-chemical-parameters-benzene-derivatives-and-terpenes-as-chemical-markers
#12
Piotr M Kuś, Igor Jerković, Zvonimir Marijanović, Carlo I G Tuberoso
GC-MS of HS-SPME and solvent extractives along with targeted HPLC-DAD of Polish fir (Abies alba Mill.) honeydew honey (FHH), were used to determine the chemical profiles and potential markers of botanical origin. Additionally, typical physical-chemical parameters were also assigned. The values determined for FHH were: conductivity (1.2 mS/cm), water content (16.7 g/100 g), pH (4.5) and CIE chromaticity coordinates (L* = 48.4, a* = 20.6, b* = 69.7, C* = 72.9 and h° = 73.5). FHH contained moderate-high total phenolic content (533...
June 28, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28656215/syringic-acid-inhibits-apoptosis-pathways-via-downregulation-of-p38mapk-and-jnk-signaling-pathways-in-h9c2-cardiomyocytes-following-hypoxia-reoxygenation-injury
#13
Shou-Kun Ding, Li-Xia Wang, Lei-Sheng Guo, Ping Luo, Juan-Juan Du, Zong-Lei Zhao, Guang-Gong Wang
Syringic acid (SA), a naturally occur-ring O‑methy-lated trihydroxybenzoic acid monomer extracted from Dendrobium nobile Lindl., has been demonstrated to attenuate renal ischemia‑reperfusion (I/R) injury. However, the role of SA in myocardial I/R injury is unclear. The present study aimed to clarify the cardioprotective effect of SA in myocardial I/R injury in vitro and explore the potential molecular mechanisms. In the present study, it was revealed that pretreatment with SA increased the viability and inhibited oxidant stress in H9c2 cardiomyocytes that had suffered hypoxia/reoxygenation (H/R)...
August 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28646693/antibacterial-effect-of-genetically-engineered-bacteriophage-%C3%AF-ef11-%C3%AF-fl1c-%C3%AE-36-p-nisa-on-dentin-infected-with-antibiotic-resistant-enterococcus-faecalis
#14
Justine Monnerat Tinoco, Nadia Liss, Hongming Zhang, Roni Nissan, Wanda Gordon, Eduardo Tinoco, Luciana Sassone, Roy Stevens
OBJECTIVE: Enterococcus faecalis is a gram-positive facultative anaerobic bacterium, which is present in 30-89% of teeth with postendodontic treatment failures. E. faecalis is capable of penetrating dentinal tubules and surviving as a monoculture after conventional endodontic therapy, indicating that it is resistant to commonly used endodontic disinfection protocols. Different E. faecalis strains have shown resistance to several antibiotics, and have been associated with both dental pathology and systemic infections...
June 12, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28622602/assessment-of-the-phenolic-profile-antimicrobial-activity-and-oxidative-stability-of-transgenic-perilla-frutescens-l-overexpressing-tocopherol-methyltransferase-%C3%AE-tmt-gene
#15
Bimal Kumar Ghimire, Chang Yeon Yu, Ill-Min Chung
This study evaluated the effects of enhanced concentrations of α-tocopherol and phenolic compounds on the resistance and stability of Perilla oil in transgenic Perilla frutescens plants against various tested pathogenic bacteria by over-expressing the γ-tmt gene. The concentration of phenolic compounds in the non-transgenic samples was 9313.198 ± 18.887 μg g(-1) dry weight (DW), whereas the total concentration of the transgenic samples ranged from 9118.015 ± 18.822 to 10527.612 ± 20.411 μg g(-1) DW...
June 7, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28602194/online-coupling-of-fully-automatic-in-syringe-dispersive-liquid-liquid-microextraction-with-oxidative-back-extraction-to-inductively-coupled-plasma-spectrometry-for-sample-clean-up-in-elemental-analysis-a-proof-of-concept
#16
Burkhard Horstkotte, Kateřina Fikarová, David J Cocovi-Solberg, Hana Sklenářová, Petr Solich, Manuel Miró
A proof of concept of a novel automatic sample cleanup approach for metal assays in troublesome matrixes as a front-end sample pre-treatment to inductively coupled plasma optical emission spectroscopy - ICP-OES - is herein presented. Target metals, namely, copper, lead, and cadmium were complexed in-system quantitatively using ammonium pyrrolidine dithiocarbamate (APDC) and transferred into a minute volume of toluene as extractant employing lab-in-syringe magnetic stirring-assisted dispersive liquid-liquid microextraction (LIS-MSA-DLLME)...
October 1, 2017: Talanta
https://www.readbyqxmd.com/read/28581735/covalent-capture-of-aligned-self-assembling-nanofibers
#17
I-Che Li, Jeffrey D Hartgerink
A great deal of effort has been invested in the design and characterization of systems which spontaneously assemble into nanofibers. These systems are interesting for their fundamental supramolecular chemistry and have also been shown to be promising materials, particularly for biomedical applications. Multidomain peptides are one such assembler, and in previous work we have demonstrated the reversibility of their assembly under mild and easily controlled conditions, along with their utility for time-controlled drug delivery, protein delivery, cell encapsulation, and cell delivery applications...
June 14, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28578863/estimating-the-cascade-of-hepatitis-c-testing-care-and-treatment-among-people-who-inject-drugs-in-australia
#18
Jenny Iversen, Jason Grebely, Beth Catlett, Philip Cunningham, Gregory J Dore, Lisa Maher
BACKGROUND: Hepatitis C virus (HCV) infection is endemic among people who inject drugs (PWID) globally. Despite high prevalence, treatment uptake is low, with cumulative uptake <10% in most settings. This study aimed to populate the cascade of HCV testing, care and treatment among PWID using data collected in Australia prior to the introduction of broadly accessible interferon-free direct-acting antiviral (DAA) therapies in March 2016. METHODS: The Australian Needle and Syringe Program Survey is a cross-sectional surveillance system that recruits ∼2300 PWID annually and collects behavioural data and dried blood samples (DBS)...
June 1, 2017: International Journal on Drug Policy
https://www.readbyqxmd.com/read/28577265/on-the-injectability-of-free-standing-magnetic-nanofilms
#19
Silvia Taccola, Virginia Pensabene, Toshinori Fujie, Shinji Takeoka, Nicola M Pugno, Virgilio Mattoli
Free-standing films with sub-micrometric thickness, composed of soft polymers and functional nanostructures are promising candidates for many potential applications in the biomedical field, such as reduced port abdominal surgery. In this work, freely suspended poly(L-lactic acid) nanofilms with controlled morphology embedding superparamagnetic iron oxide nanoparticles were fabricated by spin-coating deposition. The mechanical properties of magnetic nanofilms were investigated by Strain-Induced Elastic Buckling Instability for Mechanical Measurements (SIEBIMM) test...
September 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28574197/cross-sectional-study-of-the-microbiological-safety-profile-of-reusing-hyaluronic-acid-fillers
#20
Rubens Pontello, Rogério Nabor Kondo, Priscila Daiane Pavezzi, Theo Nicolacopulos, Julia Pagung Kippert, Clarissa Lena
INTRODUCTION: Facial filling with hyaluronic acid (HA) is a dermatological procedure that has been emerging today. There are not many references regarding safety of reusing the remaining product for later touch-up in the same patient. OBJECTIVE: To determine the microbiological safety of reusing hyaluronic acid that is remnant from syringes used for facial filling, stored at room temperature or cooled in a refrigerator at 4°C. MATERIALS AND METHODS: In culture medium, small aliquots of leftovers from 31 hyaluronic acid fillers, previously used for facial filling, were inoculated...
June 2, 2017: Journal of Cosmetic Dermatology
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