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https://www.readbyqxmd.com/read/28098940/characterization-of-date-deglet-nour-seed-free-and-bound-polyphenols-by-high-performance-liquid-chromatography-mass-spectrometry
#1
Sameera Sirisena, Dimitrios Zabaras, Ken Ng, Said Ajlouni
Date (Pheonix dactylifera L.) seeds are a valuable and abundant by-product with various potential food applications. Free polyphenols (FPPs) and bound polyphenols (BPPs) of date seeds from Deglet Nour variety grown in Australia were investigated using high-performance liquid chromatography-mass spectrometry. The FPP fraction contained the following main phenolic compounds per gram of date seed powder; procyanidin B1 (499.8 ± 7.8 μg), procyanidin B2 (288.6 ± 6.1 μg), catechin (167.6 ± 2.1 μg), epicatechin (39...
January 18, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28098892/metabolomics-study-on-primary-dysmenorrhea-patients-during-the-luteal-regression-stage-based-on-ultra-performance-liquid-chromatography-coupled-with-quadrupole%C3%A2-time%C3%A2-of%C3%A2-flight-mass-spectrometry
#2
Ling Fang, Caiyun Gu, Xinyu Liu, Jiabin Xie, Zhiguo Hou, Meng Tian, Jia Yin, Aizhu Li, Yubo Li
Primary dysmenorrhea (PD) is a common gynecological disorder which, while not life‑threatening, severely affects the quality of life of women. Most patients with PD suffer ovarian hormone imbalances caused by uterine contraction, which results in dysmenorrhea. PD patients may also suffer from increases in estrogen levels caused by increased levels of prostaglandin synthesis and release during luteal regression and early menstruation. Although PD pathogenesis has been previously reported on, these studies only examined the menstrual period and neglected the importance of the luteal regression stage...
January 13, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28098848/identification-of-phenolic-compounds-from-hancornia-speciosa-apocynaceae-leaves-by-uhplc-orbitrap-hrms
#3
Katherine Xavier Bastos, Clarice Noleto Dias, Yuri Mangueira Nascimento, Marcelo Sobral da Silva, Silvana Maria Zucolotto Langassner, Ludger A Wessjohann, Josean Fechine Tavares
Apocynaceae is a botanical family distributed mainly in tropical and subtropical regions of the world. In Brazil, they comprise about 90 genera and 850 species, inhabiting various types of vegetation. Within this large botanical family, the genus Hancornia is considered monotypic, with its only species Hancornia speciosa Gomes. Antihypertensive, antidiabetic, and antiviral activities are described for this species. Despite having been the target of some studies, knowledge of its chemical composition is still limited...
January 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28098847/polish-yellow-sweet-clover-melilotus-officinalis-l-honey-chromatographic-fingerprints-and-chemical-markers
#4
Izabela Jasicka-Misiak, Ewa Makowicz, Natalia Stanek
A case study of Polish Melilotus officinalis honey was presented for the first time. Gas chromatography-mass spectrometry (GC-MS) (after steam distillation, Soxhlet extraction, ultrasonic solvent extraction, and solid phase extraction (SPE)) and targeted high performance liquid chromatography with a photodiode array detector (HPLC-PAD) were applied to determine the characteristic components of honey. While ubiquitous in most honeys, carbohydrates, terpene derivatives, and phenylacetic acid dominated in the Soxhlet extracts (25...
January 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28098828/development-of-a-topical-resveratrol-formulation-for-commercial-applications-using-dendrimer-nanotechnology
#5
Tyler Pentek, Eric Newenhouse, Brennin O'Brien, Abhay Singh Chauhan
Resveratrol (RSV) is well known for its anti-oxidant and anti-aging properties. However, resveratrol is insoluble in water and has stability issues. Recently, efforts were placed to prepare a resveratrol-based advanced anti-aging topical product but it contains harsh organic solvents and oils that could be harmful to the human body and the environment. Hence, we propose the use of a multifunctional dendrimer to solve the solubility and stability issues of resveratrol. A dendrimer-resveratrol complex was prepared, optimized and tested for solubility enhancement, stability in solution and cream dosage forms...
January 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28098824/fabrication-of-a-miniature-multi-parameter-sensor-chip-for-water-quality-assessment
#6
Bo Zhou, Chao Bian, Jianhua Tong, Shanhong Xia
Water contamination is a main inducement of human diseases. It is an important step to monitor the water quality in the water distribution system. Due to the features of large size, high cost, and complicated structure of traditional water determination sensors and devices, it is difficult to realize real-time water monitoring on a large scale. In this paper, we present a multi-parameter sensor chip, which is miniature, low-cost, and robust, to detect the pH, conductivity, and temperature of water simultaneously...
January 14, 2017: Sensors
https://www.readbyqxmd.com/read/28098801/a-novel-antihypertensive-derived-from-adlay-coix-larchryma-jobi-l-var-ma-yuen-stapf-glutelin
#7
Bin Li, Liansheng Qiao, Lingling Li, Yanling Zhang, Kai Li, Lingzhi Wang, Yanjiang Qiao
Our previous studies have shown that Coix glutelin pepsin hydrolysate can effectively inhibit angiotensin converting enzyme (ACE) activity in vitro. The main purpose of this study was to obtain potent anti-hypertensive peptides from Coix glutelin. The Coix glutelin hydrolysates (CGH) were prepared by pepsin catalysis and further separated by an ultrafitration (UF) system, gel filtration chromatography (GFC) and reversed-phase high performance liquid chromatography (RP-HPLC). As a result, the sub-fraction F5-3 had the highest ACE-inhibitory activity...
January 13, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28098796/comparative-metabolite-profiling-of-triterpenoid-saponins-and-flavonoids-in-flower-color-mutations-of-primula-veris-l
#8
Lysanne Apel, Dietmar R Kammerer, Florian C Stintzing, Otmar Spring
Primula veris L. is an important medicinal plant with documented use for the treatment of gout, headache and migraine reaching back to the Middle Ages. Triterpenoid saponins from roots and flowers are used in up-to-date phytotherapeutic treatment of bronchitis and colds due to their expectorant and secretolytic effects. In addition to the wild type plants with yellow petals, a red variant and an intermediate orange form of Primula veris L. have recently been found in a natural habitat. The secondary metabolite profiles of roots, leaves and flowers of these rare variants were investigated and compared with the wild type metabolome...
January 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28098506/capsicum-annuum-var-grossum-bell-pepper-inhibits-%C3%AE-secretase-activity-and-%C3%AE-amyloid1-40-aggregation
#9
Omodesola Oluwafisayo Ogunruku, Ganiyu Oboh, Sabina Passamonti, Federica Trammer, Aline Augusti Boligon
The deposition of amyloid protein as senile plaques is the major signature of Alzheimer's disease (AD). It is produced by the sequential cleavage of the amyloid precursor protein by secretases. Moreover, peppers are noted for their antiaging and cognitive enhancing properties. Thus, in this study, the effects of polyphenol-rich extracts from bell pepper on amyloid production and aggregation in vitro were investigated. Bell pepper (ripe and unripe) was extracted with methanol-1 N HCl (1:1 v/v). Thereafter, the inhibitory potentials of the extracts on β-secretase and β-amyloid1-40 aggregation were determined...
January 18, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28098445/circular-and-chainlike-copper-ii-lanthanide-iii-complexes-generated-by-assembly-reactions-of-racemic-and-chiral-copper-ii-cross-linking-ligand-complexes-with-ln-iii-no3-3%C3%A2-6h2o-ln-iii-gd-iii-tb-iii-dy-iii
#10
Takahiro Ueno, Takeshi Fujinami, Naohide Matsumoto, Masaki Furusawa, Ryo Irie, Nazzareno Re, Takuya Kanetomo, Takayuki Ishida, Yukinari Sunatsuki
The 1:1 assembly reaction of the racemic form of the cross-linking ligand complex Na[Cu(II)L(dpen(1R2R/1S2S))] with Ln(III)(NO3)3·6H2O gave the centrosymmetric circular (Cu(II)Ln(III))2 complex [Cu(II)L(dpen(1R2R/1S2S))Ln(III)(NO3)2]2 (1Ln: Ln = Gd, Tb, Dy), while the reaction of the enantiopure form Na[Cu(II)L(dpen(1R2R))] with Ln(III)(NO3)3·6H2O gave the chiral chainlike (Cu(II)Ln(III))1∞ complex [Cu(II)L(dpen(1R2R))Ln(III)(NO3)2(CH3CN)]1∞·CH3CN (2Ln: Ln = Gd, Tb, Dy), where {Cu(II)L(dpen(1R2R))}(-) is (N-((1R,2R)-2-(((E)-3-ethoxy-2-oxybenzylidene)amino)-1,2-diphenylethyl)-2-oxybenzamide)copper(II) and {Cu(II)L(dpen(1R2R/1S2S))}(-) is the racemic mixture of {Cu(II)L(dpen(1R2R))}(-) and {Cu(II)L(dpen(1S2S))}(-)...
January 18, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28098424/application-of-zein-modified-magnetite-nanoparticles-in-dispersive-magnetic-micro-solid-phase-extraction-of-synthetic-food-dyes-in-foodstuffs
#11
Azam Jangju, Khalil Farhadi, Mehdi Hatami, Samireh Amani, Farzan Esmali, Aisan Moshkabadi, Fatemeh Hajilari
A simple method for the simultaneous and trace analysis of four synthetic food azo dyes including carmoisine, ponceau 4R, sunset yellow and allura red from some foodstuff samples was developed by combining dispersive μ-solid-phase extraction and high-performance liquid chromatography with diode array detection. Zein-modified magnetic Fe3 O4 nanoparticles were prepared and used for μ-solid-phase extraction of trace amounts of mentioned food dyes. The prepared modified magnetic nanoparticles were characterized by scanning electron microscopy and FTIR spectroscopy...
January 18, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28098420/deciphering-chemical-interactions-between-glycyrrhizae-radix-and-coptidis-rhizoma-by-liquid-chromatography-with-transformed-multiple-reaction-monitoring-mass-spectrometry
#12
Zhenhao Li, Ting Liu, Jie Liao, Ni Ai, Xiaohui Fan, Yiyu Cheng
In this study, we propose an integrated strategy for the efficient identification and quantification of herbal constituents using liquid chromatography with mass spectrometry. First, liquid chromatography with quadrupole time-of-flight mass spectrometry was employed for the chemical profiling of herbs, where a targeted following non-targeted approach was developed to detect trace constituents by using structural correlations and extracted ion chromatograms. Next, ion pairs and parameters of MS(2) of quadrupole time-of-flight mass spectrometry were selected to design multiple reaction monitoring transitions for the identified compounds on liquid chromatography with triple quadrupole mass spectrometry...
January 18, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28098419/determination-of-a-broad-spectrum-of-endocrine-disrupting-pesticides-in-fish-samples-by-uhplc-ms-ms-using-the-pass-through-cleanup-approach
#13
Shaoying Liu, Xihui Huang, Quan Jin, Guonian Zhu
We describe a new methodology for the simultaneous determination of the endocrine-disrupting herbicides (acetochlor, alachlor, amitrole and atrazine), fungicides (carbendazim, triadimefon, penconazole and propiconazole) and insecticides (carbaryl and carbofuran) in fish samples followed by high-performance liquid chromatography with tandem mass spectrometry. Samples were extracted and purified using the pass-through cleanup approach. The recoveries of the pesticides were in the range 71.8-116.5%, with relative standard deviations lower than 15...
January 18, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28098414/integrated-photo-grafted-molecularly-imprinted-polymers-with-a-cellulose-acetate-membrane-for-the-extraction-of-melamine-from-dry-milk-before-hplc-analysis
#14
Behrouz Akbari-Adergani, Gholam-Hossein Sadeghian, Alireza Alimohammadi, Zahra Esfandiari
In this study, a new separation technique based on membrane extraction is described for the determination of melamine in dry milk. The water-compatible cellulose acetate membrane, which is photo-grafted by melamine imprinted nanospheres, was prepared by placing the membrane into the polymerization solution containing methacrylic acid as functional monomer, ethylene glycol dimethacrylate as cross-linker, acetonitrile as porogen and melamine as the template molecule. The characterization of the polymeric membrane was performed by Fourier transmission infrared spectroscopy and scanning electron microscopy...
January 18, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28098395/first-uhplc-ms-ms-method-coupled-with-automated-on-line-spe-for-quantification-both-of-tacrolimus-and-everolimus-in-peripheral-blood-mononuclear-cells-and-its-application-on-samples-from-co-treated-pediatric-patients
#15
Debora Pensi, Amedeo De Nicolò, Michele Pinon, Clarissa Pisciotta, Pier Luigi Calvo, Antonello Nonnato, Renato Romagnoli, Francesco Tandoi, Giovanni Di Perri, Antonio D'Avolio
Tacrolimus (TAC, FK-506) and everolimus (EVE, RAD001) are immunosuppressors used to treat pediatric patients undergoing liver transplantation. Their hematic TDM by liquid chromatography became standard practice. However, it does not always reflect concentrations at their active site. Our aim was to develop and validate a new method for the simultaneous TAC and EVE quantification into target cells: Peripheral-Blood-Mononuclear-Cells (PBMCs). PBMCs were collected using Cell-Preparation-Tubes; cells number and MCV were evaluated by an automatic cell counter...
January 18, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28098355/a-comparative-study-on-composition-and-antioxidant-activities-of-supercritical-carbon-dioxide-hexane-and-ethanol-extracts-from-blackberry-rubus-fruticosus-growing-in-poland
#16
Anna Wajs-Bonikowska, Agnieszka Stobiecka, Radosław Bonikowski, Agnieszka Krajewska, Magdalena Sikora, Józef Kula
BACKGROUND: Large quantities of blackberry seeds are produced as a pomace during the processing of juice and jam production - this by-product is a very interesting raw material both for oil manufacturing and as a source of bioactive compounds. In this work the composition, yield and antioxidant activity of three types of Rubus fructicosus pomace extracts isolated by liquid-extraction using solvents of different polarity, as well with supercritical CO2 fluid extraction have been compared...
January 18, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28098323/two-dimensional-melting-of-colloids-with-long-range-attractive-interactions
#17
Di Du, Manolis Doxastakis, Elaa Hilou, Sibani Lisa Biswal
The solid-liquid melting transition in a two-dimensional (2-D) attractive colloidal system is visualized using superparamagnetic colloids that interact through a long-range isotropic attractive interaction potential, which is induced using a high-frequency rotating magnetic field. Various experiments, supported by Monte Carlo simulations, are carried out over a range of interaction potentials and densities to determine structure factors, Lindermann parameters, and translational and orientational order parameters...
January 18, 2017: Soft Matter
https://www.readbyqxmd.com/read/28098297/spontaneous-assembly-of-a-hybrid-crystal-liquid-phase-in-inverse-patchy-colloid-systems
#18
Silvano Ferrari, Emanuela Bianchi, Gerhard Kahl
Materials with well-defined architectures are heavily sought after in view of their diverse technological applications. Among the desired target architectures, lamellar phases stand out for their exceptional mechanical and optical features. Here we show that charged colloids, decorated on their poles with two oppositely charged regions possess the unusual ability to spontaneously assemble in different morphologies of (semi-)ordered, layered particle arrangements which maintain their structural stability over a surprisingly large temperature range...
January 18, 2017: Nanoscale
https://www.readbyqxmd.com/read/28098287/second-harmonic-phase-determination-by-real-time-in-situ-interferometry
#19
Bason Clancy, Joshua Salafsky
Second Harmonic Generation (SHG) has emerged as a highly sensitive probe of protein conformation. SHG can also be used to determine the tilt angle of an SHG-active moiety bound to a surface-adsorbed protein through polarization-dependent measurements. However, due to the coherent nature of SHG, interference occurs between the SHG produced by the SHG-active moieties and background sources at a solid-liquid interface, obscuring the signal of interest. In order to separate the protein-specific signal from the background signal, the phase difference between these two different sources of SHG must be determined...
January 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28098280/single-lithium-ion-conducting-solid-polymer-electrolytes-advances-and-perspectives
#20
REVIEW
Heng Zhang, Chunmei Li, Michal Piszcz, Estibaliz Coya, Teofilo Rojo, Lide M Rodriguez-Martinez, Michel Armand, Zhibin Zhou
Electrochemical energy storage is one of the main societal challenges to humankind in this century. The performances of classical Li-ion batteries (LIBs) with non-aqueous liquid electrolytes have made great advances in the past two decades, but the intrinsic instability of liquid electrolytes results in safety issues, and the energy density of the state-of-the-art LIBs cannot satisfy the practical requirement. Therefore, rechargeable lithium metal batteries (LMBs) have been intensively investigated considering the high theoretical capacity of lithium metal and its low negative potential...
January 18, 2017: Chemical Society Reviews
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