Correlation between the Stability Constant and pH for β-Cyclodextrin Complexes
Publication date: Available online 15 July 2019Source: International Journal of PharmaceuticsAuthor(s): Lisa Samuelsen, René Holm, Audrey Lathuile, Christian SchönbeckAbstractIn drug formulations, cyclodextrins are used to increase aqueous solubility and chemical stability of drugs via formation of inclusion complexes. For ionizable drug molecules, the complexation strength depends on pH. Increased ionization leads to a more soluble drug, but also results in destabilization of cyclodextrin complexes. Therefore, formulation scientists aim to find a balance between increased drug solubility and high complexation ...
Source: International Journal of Pharmaceutics - July 17, 2019 Category: Drugs & Pharmacology Source Type: research

PTSD Symptom Clusters and Craving Differs by Primary Drug of Choice.
Conclusions: Findings suggest that craving may play a role in maintaining the relationship between specific PTSD symptom clusters and substance use disorder, and the nature of this relationship may differ by primary DOC. The clinical trial on which this secondary analysis of data was conducted is registered as NCT01159535 at www.clinicaltrials.gov . The original trial from which data for this study was drawn was supported by the National Institutes of Health [NIH/NIDA 5 R01 DA025764-02]. PMID: 31304887 [PubMed - as supplied by publisher] (Source: Journal of Dual Diagnosis)
Source: Journal of Dual Diagnosis - July 17, 2019 Category: Addiction Tags: J Dual Diagn Source Type: research

From Baking Up Nitrous Oxide to Making Goals: Rindge Tech ’s L. A. Brennan
From the archives of the Wood Library-Museum, readers can see nitrous oxide –generating apparatus hand-drawn (upper left) in the 1914 laboratory notebook (upper right) of Lawrence A. Brennan of Rindge Technical School in Cambridge, Massachusetts. Young Brennan records how he heated ammonium nitrate to produce laughing gas in his chemistry classroom. Brennan then traded his glassware in for a puck and played hockey at Boston College. About 35 yr after generating laughing gas at Rindge Tech, he “got his jollies” by becoming a Boston College Alumni Association representative. (Copyright © the American S...
Source: Anesthesiology - July 17, 2019 Category: Anesthesiology Source Type: research

Formation of the third bodies of steel sliding against brass under lubricated conditions
Publication date: December 2019Source: Tribology International, Volume 140Author(s): Lin Liu, Yuanyuan Sheng, Ming Liu, Martin Dienwiebel, Zhichen Zhang, Davoud DastanAbstractThis work investigates the formation mechanism of the third bodies for brass under lubricated conditions. A tribometer based on on-line and radio-nuclide technique (RNT) techniques is used to perform the sliding experiment of brass versus steel. The microstructure, micro-hardness and chemical composition of the third bodies are analyzed by mean of the scanning electron microscope (SEM), focused ion beam microscope (FIB), transmission electron microsco...
Source: Tribology International - July 17, 2019 Category: Materials Science Source Type: research

Preparation and testing of glass powder reinforced polyester resin lamina
Publication date: Available online 15 July 2019Source: Materials Today: ProceedingsAuthor(s): Mohd Abdul Mubeen, Ch. Karunakar, S. SripathyAbstractThe glass powder and matrices are chemically different; strong adhesion at their interfaces is needed for an effective transfer of stress and bond distribution throughout an interface is essential. Laminas were prepared with different weight percentage of glass powder by using Hand-layup technique. The mechanical properties of composites are evaluated by flexural, tensile and compression tests as per the ASTM standards. The result shows that 20% glass powder lamina exhibited hig...
Source: Materials Today: Proceedings - July 17, 2019 Category: Materials Science Source Type: research

Investigation of chemical, thermal and morphological properties of untreated and NaOH treated banana fiber
Publication date: Available online 15 July 2019Source: Materials Today: ProceedingsAuthor(s): A. Parre, B. Karthikeyan, A. Balaji, R. UdhayasankarAbstractThe Banana leaf fibers were chemically treated with 1, 3, 5, 7 and 9% NaOH, further the effect of the same on the fiber properties was analysed. The Fourier Transform Infrared Spectrometry (FTIR) analysis was used to identify the chemical compounds of untreated and NaOH treated fibers. The morphological study on untreated and NaOH treated fibers by Scanning Electron Microscopic (SEM) divulge the fact of the impurities on the untreated fiber surface and removal of the same...
Source: Materials Today: Proceedings - July 17, 2019 Category: Materials Science Source Type: research

Material engineering of percolating silicon nanowire networks for reliable and efficient electronic devices
Publication date: Available online 15 July 2019Source: Materials Chemistry and PhysicsAuthor(s): Maxime Legallais, Thi Thu Thuy Nguyen, Thibauld Cazimajou, Mireille Mouis, Bassem Salem, Céline TernonAbstractMotivated to produce reliable and performant SiNW-based transistors, we present in this work how percolating networks composed of randomly oriented SiNWs, called nanonets, are a promising material if they are well engineered. We demonstrate that a proper material engineering of nanonets via alumina encapsulation allows to drastically enhance the electrical characteristics of back gate field effect transistors (FE...
Source: Materials Chemistry and Physics - July 17, 2019 Category: Materials Science Source Type: research

Mechanical alloying assisted spark plasma sintering of Tungsten diboride ceramics
Publication date: Available online 15 July 2019Source: Materials Chemistry and PhysicsAuthor(s): Jintao Che, Ying Long, Xin Zheng, Hua-Tay Lin, Kevin PlucknetAbstractHerein, we demonstrate the fabrication of tungsten boride from high-purity tungsten (W) and boron (B) powders through mechanical alloying (MA), followed by spark plasma sintering (SPS) for the first time. First, WB2 powders are synthesized by mechanical alloying, which is achieved by high energy ball milling for 50 h. The phase composition and microstructure of the as-milled powders are characterized by X-ray diffraction (XRD), scanning electron microscopy (SE...
Source: Materials Chemistry and Physics - July 17, 2019 Category: Materials Science Source Type: research

Biogenic synthesis and antibacterial activity of controlled silver nanoparticles using an extract of Gongronema Latifolium
Publication date: Available online 15 July 2019Source: Materials Chemistry and PhysicsAuthor(s): Samson O. Aisida, Kenneth Ugwu, Paul A. Akpa, Assumpta C. Nwanya, Paul M. Ejikeme, S. Botha, Ishaq Ahmad, M. Maaza, Fabian I. EzemaAbstractBiogenic synthesis of silver nanoparticles (AgNPs) was conducted via an aqueous extract of fresh leaf of Gongronema Latifolium (FLGL) an herbaceous flowering plant as a fuel agent. The effects of different AgNO3 concentration with the fixed volume of FLGL on the properties of the formulated AgNPs were investigated. Also, the antibacterial activity AgNPs formed was observed through the solid ...
Source: Materials Chemistry and Physics - July 17, 2019 Category: Materials Science Source Type: research

A sensitive electrochemical sensor for simultaneous voltammetric sensing of cadmium and lead based on Fe3O4/multiwalled carbon nanotube/laser scribed graphene composites functionalized with chitosan modified electrode
Publication date: Available online 15 July 2019Source: Materials Chemistry and PhysicsAuthor(s): Zhiwen Xu, Xinkai Fan, Qiaoying Ma, Biao Tang, Zhiwei Lu, Junjun Zhang, Guangquan Mo, Jiaping Ye, Jianshan YeAbstractIn this work, based on a Fe3O4/multiwalled carbon nanotube/laser scribed graphene composites functionalized with chitosan modified glassy carbon electrode (Fe3O4/MWCNTs/LSG/CS/GCE), a highly active, sensitive, facile and low-cost electrochemical sensor was fabricated to determine cadmium (Cd2+) and lead (Pb2+) simultaneously using square wave anodic stripping voltammetry (SWASV). This novel nanocomposite possesse...
Source: Materials Chemistry and Physics - July 17, 2019 Category: Materials Science Source Type: research

Synthesis and characterization of substituted poly(naphthalene)s with imine bonding containing thiophene unit
In this study, 5-(4H-dithieno[3,2-b:2’,3’-d]pyrrol-4-yl)naphthalen-1-amine was synthesized from the required reaction conditions of 3,3'-dibromo-2,2'-bithiophene with 1,5-diamine naphthalene. Then, Schiff base monomers were synthesized from the condensation reactions of 5-(4H-dithieno[3,2-b:2’,3’-d]pyrrol-4-yl)naphthalen-1-amine with mono aldehydes such as 2-hydroxybenzaldehyde, 4-hydroxybenzaldehyde and isovaniline. The Schiff base monomers were polymerized via oxidative polycondensation in 0.1 M KOH aqueous solution at 90°C by 10-15% NaOCl oxidant. The structures of synthesized compounds were ...
Source: Materials Chemistry and Physics - July 17, 2019 Category: Materials Science Source Type: research

Impact of Co/Mo ratio on the activity of CoMo/MgO catalyst for production of high-quality multi-walled carbon nanotubes from polyethylene waste
Publication date: Available online 15 July 2019Source: Materials Chemistry and PhysicsAuthor(s): Ateyya A. Aboul-Enein, Ahmed E. AwadallahAbstractA simple two-stage method was used to produce multiwalled carbon nanotubes (MWCNTs) from low-density polyethylene waste (LDPE) using a group of CoMo/MgO catalysts with several Co/Mo molar ratios (14.5, 6.5, 2.5, 1 and 0.4). The catalytic degradation of LDPE waste was performed using the HZSM-5 catalyst at a low temperature of 400 °C to form non-condensable gases, which were subsequently used as a carbon source for the production of MWCNTs at 700 oC. The influence of Co/Mo rat...
Source: Materials Chemistry and Physics - July 17, 2019 Category: Materials Science Source Type: research

Density functional theory studies of the SrC and SrN compounds
Publication date: Available online 16 July 2019Source: Materials Chemistry and PhysicsAuthor(s): L. Beldi, H. Bendaoud, K.O. Obodo, B. Abbar, B. BouhafsAbstractThe structural, magnetic, elastic, dynamical and thermodynamic properties of the SrC and SrN compounds were studied using density functional theory. We found that the CsCl and NaCl phases have the lowest energy configurations as a function of volume for SrC and SrN compounds considered respectively. The preferred ground state configuration for the SrN and SrC compounds is the ferromagnetic configuration with the exception of the CsCl and tetragonal phases in the SrC...
Source: Materials Chemistry and Physics - July 17, 2019 Category: Materials Science Source Type: research

Photodegradation of Direct Blue 1 azo dye by polymeric carbon nitride irradiated with accelerated electrons
Publication date: 1 November 2019Source: Materials Chemistry and Physics, Volume 237Author(s): Grace Picho-Chillán, Roberto C. Dante, Florinella Muñoz-Bisesti, Pablo Martín-Ramos, Pedro Chamorro-Posada, Paul Vargas-Jentzsch, Francisco M. Sánchez-Arévalo, Christian Sandoval-Pauker, Dario RuttoAbstractWater bodies throughout the world are severely affected by the discharge of industrial effluents contaminated with xenobiotic and recalcitrant substances. Due to the low biodegradability of these compounds, conventional treatments have proven to be insufficient for their removal. Although hete...
Source: Materials Chemistry and Physics - July 17, 2019 Category: Materials Science Source Type: research

3D re-crosslinking of an acid-resistant layer on NaA tubular membrane for application in acidic feed
Publication date: Available online 15 July 2019Source: Journal of Membrane ScienceAuthor(s): Jie Li, Chong Li, Xiaoqing Li, Naixin Wang, Shulan Ji, Quan-Fu AnAbstractNaA membranes are recognized as one of the most promising materials for fabrication of high-performance pervaporation membrane for dehydration, which has been widely employed in dehydration industry. However, the chemical structure breakage of NaA in acidic conditions severely hampered the application of NaA membrane in purification of biomass fermentation. In order to overcome this bottleneck, we proposed construction of a protective acid-resistant skin on th...
Source: Journal of Membrane Science - July 17, 2019 Category: Materials Science Source Type: research

Influence of membrane characteristics and operating parameters on transport properties of dissolved methane in a hollow fiber membrane contactor for biogas recovery from anaerobic effluents
Publication date: Available online 16 July 2019Source: Journal of Membrane ScienceAuthor(s): G.S.M.D.P. Sethunga, Jaewoo Lee, Rong Wang, Tae-Hyun BaeAbstractSeveral factors affect the performance of membrane-contacting systems for recovering dissolved methane (CH4) from anaerobic effluents, from membrane-to operations-related parameters. However, the conditions necessary to achieve high-efficiency CH4 recovery remain unclear. To improve our understanding of these dynamics, we systematically investigated the effects of membranes' physicochemical characteristics and operating parameters in a membrane-contacting system. We no...
Source: Journal of Membrane Science - July 17, 2019 Category: Materials Science Source Type: research

Fine tuning of optoelectronic properties of single-walled carbon nanotubes from conductors to semiconductors
We describe a methodology to do so in a very controlled manner on single-walled carbon nanotubes (SWNT). The approach relies on the extreme extension of a functionalization by 4-nitrobenzenediazoether. We show that the water-soluble Z-diazoether already known to react selectively with metallic m-SWNTs, can also extract electrons from sc-SWNTs. The gradual formation of a covalent aryl bond alters the SWNT electrical conductivity in two steps depending on the functionalization degree. The two consecutive regimes correspond to the grafting of conductor and semiconductor nanotubes. The extent of functionalization was assessed ...
Source: Carbon - July 17, 2019 Category: Materials Science Source Type: research

Purification and characterization of an antimicrobial compound produced by Lactobacillus plantarum EM showing both antifungal and antibacterial activities
Publication date: Available online 16 July 2019Source: LWTAuthor(s): So Yeong Mun, Sung Kyung Kim, Eun Rhan Woo, Hae Choon ChangAbstractLactobacillus plantarum EM exhibited antimicrobial activities against different food-borne pathogenic bacteria and food spoilage fungi. The compounds showing antibacterial and antifungal activities were identified as organic acids, lactic and acetic acids, and unidentified antimicrobial compounds. Thus the unidentified antimicrobial compounds were purified using solid phase extraction and recycling preparative HPLC and its structure was elucidated using NMR and LC/MS. The purified active c...
Source: LWT Food Science and Technology - July 17, 2019 Category: Food Science Source Type: research

Dynamics of Enterobacteriaceae and lactobacilli in model sourdoughs are driven by pH and concentrations of sucrose and ferulic acid
This study aimed to assess, in model sourdough fermentations, the relevance of physico-chemical features of flour for the interactions between Enterobacteriaceae and lactobacilli, and for the interactions within the latter microbial group. Initially, model sourdoughs made with white wheat flour, whole wheat flour or wheat bran were inoculated with Cronobacter sakazakii, Klebsiella pneumoniae, Lactobacillus plantarum and Lactobacillus sanfranciscensis. Subsequently, white wheat sourdoughs were prepared with phosphate buffer, ferulic acid, maltose, sucrose or baker's yeast. During sourdough propagation, C. sakazakii and K. p...
Source: LWT Food Science and Technology - July 17, 2019 Category: Food Science Source Type: research

Effects of nanoemulsion-based active coatings with composite mixture of star anise essential oil, polylysine, and nisin on the quality and shelf life of ready-to-eat Yao meat products
Publication date: Available online 16 July 2019Source: Food ControlAuthor(s): Qiong Liu, Min Zhang, Bhesh Bhandari, Jicheng Xu, Chaohui YangAbstractThe negative effects exerted by chemical and thermal preservations on health and food quality have led to a rising interest in the active coating with natural antimicrobials, as a novel alternative. The aim of this study was to prepare and characterize the nanoemulsion incorporated with the mixture of star anise essential oil, polylysine and nisin, then evaluate the influences of nanoemulsion-based active coating (NEAC) on quality attributes and shelf life of Yao meat. Physicoc...
Source: Food Control - July 17, 2019 Category: Food Science Source Type: research

Untargeted and targeted metabolomics analyses of blackberries - understanding postharvest red drupelet disorder
Publication date: Available online 11 July 2019Source: Food ChemistryAuthor(s): Moo Jung Kim, Mee Youn Lee, Jong Cheol Shon, Yong Sung Kwon, Kwang-Hyeon Liu, Choong Hwan Lee, Kang-Mo KuAbstractRed drupelet is a postharvest disorder of blackberries with several drupelets turning back to red. This affects visual quality and thus marketability and consumers’ acceptance. However, the cause of this disorder as well as metabolite changes during color reversion have not been fully understood. Anthocyanins, cyanidin 3-glucoside, cyanidin 3-malonylglucoside, cyanidin 3-dioxalylglucoside, and total anthocyanin, were significan...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Effects of successive harvesting in the same year on quality and bioactive compounds of grapes and juices in semi-arid tropical viticulture
Publication date: Available online 11 July 2019Source: Food ChemistryAuthor(s): Carla Valéria da Silva Padilha, Marcos dos Santos Lima, Isabela Maia Toaldo, Giuliano Elias Pereira, Marilde Terezinha Bordignon-LuizAbstractThe technological and polyphenolic parameters of grapes for juice processing obtained from successive harvests were studied in semi-arid tropical viticulture. Red grapes “BRS Violeta” and “Isabel Precoce” were harvested during the same year and analyzed based on a multivariate approach that included climatic variations. The grapes were marked by variations in flavonoid compou...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Protein-polysaccharide complex coated W/O/W emulsion as secondary microcapsule for hydrophilic arbutin and hydrophobic coumaric acid
This study aimed to examine the modification effect of whey protein concentrate (WPC), WPC-gum arabic (WPC-GA) or WPC-high methoxyl pectin (WPC-PEC) complex to tailor-modify W/O/W emulsion for secondary microencapsulation of hydrophilic arbutin and hydrophobic coumaric acid. The stability and rheological properties of coated emulsions, encapsulation yield, release and degradation kinetics of arbutin and coumaric acid were investigated. Results revealed that WPC-PEC complex (at the ratio of 1:3) coating W/O/W emulsion exhibited the highest viscosity and stability, with the highest encapsulation yield of 91.08 % for arbutin ...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

A novel strategy to determine the compositions of inorganic elements in fruit wines using ICP-MS/MS
This study demonstrates a new approach for multi-elemental analysis in fruit wine with great convenience and high accuracy. (Source: Food Chemistry)
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Free carotenoids and carotenoids esters composition in Spanish orange and mandarin juices from diverse varieties
In this study, the native carotenoid profiles of mandarin and orange juices were studied. Xanthophylls in oranges were esterified with lauric, myristic, palmitic and stearic acids. The fatty acids esterifying β-cryptoxanthin in mandarins were lauric, myristic, palmitic and capric acid. In oranges, the average relationships of total free carotenoids to the sum of mono-esters and di-esters were 0.82 and 1.67, respectively, and the average relationships total mono-esters to total of di-esters was 2.51. In general, the mono-ester fraction was the most significant quantitatively. In mandarins, the average relationship of t...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Yeast cells in double layer calcium alginate–chitosan microcapsules for sparkling wine production
Publication date: Available online 13 July 2019Source: Food ChemistryAuthor(s): Benucci Ilaria, Cerreti Martina, Maresca Diamante, Mauriello Gianluigi, Esti MarcoAbstractThis paper focuses on the use of a new type of yeast encapsulation procedure, applying the chitosan-calcium alginate double layer microcapsules, for the production of Riesling sparkling wine. Four different sparkling wines were produced by free or encapsulated yeasts. The four types of yeast used were adapted (Free EtOH-A, Encapsulated EtOH-A) and non-adapted to ethanol (Free, Encapsulated).The different yeast-inoculating formats had a significant impact o...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

A Non-Enzymatic Electrochemical Sensor based on ZrO2: Cu(I) Nanosphere Modified Carbon Paste Electrode for Electro-Catalytic Oxidative detection of Glucose in raw Citrus aurantium var. sinensis
Publication date: Available online 13 July 2019Source: Food ChemistryAuthor(s): L. Parashuram, S. Sreenivasa, S. Akshatha, V. Udayakumar, S. Sandeep kumarAbstractIn this work, a sensitive and stable ZrO2-Cu(I) nanosphere mesoporous material modified non-enzymatic glucose sensor has been developed through simple, low cost chemistry.ZrO2-Cu(I) material was obtained by controlled co-precipitation method under ultra dilution conditions. Cyclic voltammetric tests were performed in order to evaluate the electrocatalytic activity ZrO2-Cu(I) modified electrode. The modified electrode showed high sensitivity, wide linear range and ...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Simultaneous Detection of Aflatoxin B1, Ochratoxin A, Zearalenone and Deoxynivalenol in Corn and Wheat Using Surface Plasmon Resonance
In conclusion, the SPR method for simultaneously detecting four mycotoxins has been developed with high sensitivity, good linearity and specificity, which can meet the detection requirements of cereal foods. (Source: Food Chemistry)
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Valorization of keratin from food wastes via crosslinking using non-toxic oligosaccharide derivatives
Publication date: Available online 13 July 2019Source: Food ChemistryAuthor(s): Xiang Mi, Yue Chang, Helan Xu, Yiqi YangAbstractOligosaccharide derivatives were developed to crosslink keratin materials from poultry feathers, swine bristles and ox hairs to valorize these major wastes from meat industry. Global butchery generates more than 8,600,000 tons of keratinous wastes annually. Keratin was considered a promising resource for developing bio-based products as alternatives to petroleum products. Regenerated keratin products, such as films, usually showed insufficient mechanical properties, and required external crosslink...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

3D-printed Rolling Circle Amplification Chip for On-site Colorimetric Detection of Inorganic Mercury in Drinking Water
Publication date: Available online 13 July 2019Source: Food ChemistryAuthor(s): Ji Won Lim, Tai-Yong Kim, Sung-Wook Choi, Min-Ah WooAbstractA point-of-care testing chip was developed for the colorimetric detection of inorganic mercury ion (Hg2+). The disposable chip fabricated by three-dimensional printing technology contains DNAzymes produced by rolling circle amplification (RCA); a color change caused by the enzymatic reaction between DNAzymes and the peroxidase substrate 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) is measured using a portable spectrophotometer. In the “turn-off”-type RCA reaction, ...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Aptamer-based thin film gold electrode modified with gold nanoparticles and carboxylated multi-walled carbon nanotubes for detecting oxytetracycline in chicken samples
Publication date: Available online 13 July 2019Source: Food ChemistryAuthor(s): Baoshan He, Long Wang, Xiaoze Dong, Xiaohai Yan, Ming Li, Sasa Yan, Dandan YanAbstractIn this work, a disposable and portable aptasensor for the fast and sensitive detection of oxytetracycline (OTC) using gold nanoparticles (AuNPs)/carboxylated multi-walled carbon nanotubes (cMWCNTs)@thionine connecting complementary strand of aptamer (cDNA) as signal tags was constructed. The substrate electrode of the aptasensor was thin film gold electrode (TFGE), which have the advantages of portable and uniform performance. In the presence of OTC, OTC comp...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Highly efficient and cost-effective removal of patulin from apple juice by surface engineering of diatomite with sulfur-functionalized graphene oxide
Publication date: Available online 13 July 2019Source: Food ChemistryAuthor(s): Manshun Liu, Jing Wang, Xin Wang, Wenxin Zhu, Xiaolin Yao, Lihong Su, Jing Sun, Tianli Yue, Jianlong WangAbstractPatulin (PAT) contamination of apple juice leads to a serious food safety issue. Developing an excellent adsorbent to efficiently remove PAT is more desirable. Herein, a cost-effective and efficient adsorbent (GO-SH/diatomite) with abundant active sites was successfully fabricated via surface engineering of diatomite with sulfur-functionalized graphene oxide (GO-SH) nanosheets, which exhibited excellent selective adsorption capacity ...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Complete validation according to current international criteria of a confirmatory quantitative method for the determination of nitrofuran metabolites in seafood by liquid chromatography isotope dilution tandem mass spectrometry
We report for the first time a new false positive for 1-amino-2,4-imidazolidinedione (AHD), the metabolite of Nitrofurantoin (NFT). By using optimized washing procedures, the non tissue bound false positives can be minimized. The results from the validation on both lean and fatty fish and crustaceans, results from proficiency tests and routine use over many years, demonstrates that the method is fit for purpose to determine NF metabolites in the seafood category.Graphical abstract (Source: Food Chemistry)
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Analysis of crystallization phenomenon in Indian honey using molecular dynamics simulations and artificial neural network
Publication date: Available online 15 July 2019Source: Food ChemistryAuthor(s): Rishi Ravindra Naik, Neha S. Gandhi, Mamta Thakur, Vikas NandaAbstractMolecular dynamics simulation was performed on sugar profile and moisture content-based mixture systems of six Indian honey samples. Comparative studies were performed to understand the interactive effects of fructose, glucose, sucrose, maltose and water on crystallization. All simulations led to formation of stable crystal but with different interaction energies. Post-simulation analysis showed that Fructose:Glucose of 1.18 formed the most stable crystal with highest van der...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Simultaneous determination of 20 disperse dyes in foodstuffs by ultra high performance liquid chromatography-tandem mass spectrometry
Publication date: Available online 15 July 2019Source: Food ChemistryAuthor(s): Weiguo Liu, Jun Liu, Yu Zhang, Yinguang Chen, Xiaodong Yang, Luchun Duan, Rajarathnam Dharmarajan, Xiyuan Wang, Lan LiAbstractA reasonable, high sensitive and accurate analytical method for the determination of 20 allergenic disperse dyes in foodstuffs was developed and validated. The obtained results showed that an ultra high liquid performance chromatography system - equipped with tandem quadrupole mass spectrometry (UHPLC–MS/MS) proved to be ideal for the selected method enabling multidimensional processing of the samples. Under optimi...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Enabling technologies for the extraction of grape-pomace anthocyanins using natural deep eutectic solvents in up-to-half-litre batches Extraction of grape-pomace anthocyanins using NADES
Publication date: Available online 15 July 2019Source: Food ChemistryAuthor(s): Manuela Panić, Veronika Gunjević, Giancarlo Cravotto, Ivana Radojčić RedovnikovićAbstractBioactive compounds should be extracted using alternative solvents and enabling technologies, in accordance with green extraction principles. The aim of this study is to develop an eco-friendly extraction method for grape-pomace anthocyanins on a larger scale. From a preliminary screening of 8 different natural deep eutectic solvents (NADES), a combination of choline chloride:citric acid was selected because of its price, physicochemical properties, an...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Bioaccumulation of selected macro- and microelements and their impact on antioxidant properties and accumulation of glucosinolates and phenolic acids in in vitro cultures of Nasturtium officinale (watercress) microshoots
Publication date: Available online 16 July 2019Source: Food ChemistryAuthor(s): Marta Klimek-Szczykutowicz, Agnieszka Szopa, Eliza Blicharska, Michał Dziurka, Łukasz Komsta, Halina EkiertAbstractThe study evaluated bioaccumulation capacity of macro- and microelements, their impact on the production of glucosinolates and phenolic acids and antioxidant properties in a microshoot culture model of Nasturtium officinale.Elements: calcium, chromium, copper, iron, lithium, magnesium, selenium and zinc were supplemented in different salt concentrations to culture media. Bioaccumulation of elements [mg/100gDW] varied from 1.24 (L...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Multivariate response surface methodology assisted modified QuEChERS extraction method for the evaluation of organophosphate pesticides in fruits and vegetables cultivated in Nilgiris, South India
Publication date: Available online 16 July 2019Source: Food ChemistryAuthor(s): S.T. Narenderan, S.N. Meyyanathan, Veera Venkata Satyanarayana Reddy Karri, B. Babu, Pavankumar ChintamaneniAbstractAn effective, simple and sensitive analytical method has been developed employing liquid chromatography coupled with tandem mass spectrometry and validated for estimation of five organophosphate pesticides at trace levels in six fruits and twelve vegetables. Plackett-Burman design and central composite design was used to screen and optimize the significant factors in modified QuEChERS (quick, easy, cheap, effective, rugged and saf...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Protein engineering of carotenoid cleavage dioxygenases to optimize β-ionone biosynthesis in yeast cell factories
Publication date: 30 November 2019Source: Food Chemistry, Volume 299Author(s): Nicole Werner, César A. Ramirez-Sarmiento, Eduardo AgosinAbstractSynthesis of β-ionone in recombinant Saccharomyces cerevisiae is limited by the efficiency of Carotenoid Cleavage Dioxygenases (CCD), membrane-tethered enzymes catalyzing the last step in the pathway. We performed in silico design and membrane affinity analysis, focused on single-point mutations of PhCCD1 to improve membrane anchoring. The resulting constructs were tested in a β-carotene hyper-producing strain by comparing colony pigmentation against colonies trans...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Synergistic interaction between exogenous and endogenous emulsifiers and its impact on in vitro digestion of lipid in crowded medium
Publication date: 30 November 2019Source: Food Chemistry, Volume 299Author(s): Shen-Zhi Wang, Hui-Qian Dai, Ke-Xian Chen, Juan Li, Zhong-Xiu ChenAbstractControl of lipid digestibility by various food components has received great attention in recent decades. However, there is limited literature on investigating the synergistic effect of exogenous emulsifiers and endogenous sodium cholate (SC) on lipid digestion in a simulated physiological crowded medium. In this work, the synergistic interaction of Tween80 and SC according to the regular solution theory, and the hydrolysis of lipid emulsions containing tricaprylin, glycer...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Auto- and mutual-regulation between two CitERFs contribute to ethylene-induced citrus fruit degreening
Publication date: 30 November 2019Source: Food Chemistry, Volume 299Author(s): Shao-jia Li, Xiu-lan Xie, Sheng-chao Liu, Kun-song Chen, Xue-ren YinAbstractCitrus fruit postharvest degreening is a critical stage in marketing, carried out by exposure to ethylene or ethephon. Genome-wide screening of the AP2/ERF superfamily indicated that a novel ERF-II (CitERF6) was shown to trans-activate the CitPPH promoter. Expression of CitERF6 is associated with both developmental and postharvest degreening in citrus fruit. Transient and stable over-expression of CitERF6 in Nicotiana tabacum leaves and ‘Ponkan’ fruit also re...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Meat quality traits and canonical discriminant analysis to identify the use of illicit growth promoters in Charolais bulls
Publication date: 1 December 2019Source: Food Chemistry, Volume 300Author(s): S. Barbera, B. Biolatti, S. Divari, F.T. CannizzoAbstractThe administration of anabolic agents in farm animals to improve meat production has been prohibited in EU, due to the potential risks to human health. Meat quality was investigated to detect the effects of illegal administration of dexamethasone or prednisolone or 17β-estradiol on Charolais bulls. Three groups of 6 bulls were treated and 12 bulls were the control. Meat quality parameters were measured on live animals, carcasses and on samples of Longissimus thoracis and multivariate s...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Filter aid selection allows modulating the vanadium concentration in beverages
This study reports a clear-cut relationship of the technological use of specific filter aids with highly variable vanadium levels in beer, wine, and fruit juices. First, the previously reported broad range of vanadium levels was confirmed in 68 commercial beverages by ICP-MS. Since cloudy apple juices exhibited significantly lower vanadium amounts than clear apple juices, filter aids used for clarification were analyzed and found to contain substantial and highly variable amounts of vanadium, particularly in all analyzed diatomite (38-368 mg vanadium per kg filter aid), but not in perlite products (
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Simultaneous extraction and separation of oil, proteins, and glucosinolates from Moringa oleifera seeds
This study provides a simple and high-efficient method to utilize M. oleifera seeds. (Source: Food Chemistry)
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Reduced IgE/IgG Binding Capacities of Bovine α-Lactalbumin by Glycation after Dynamic High-Pressure Microfluidization Pretreatment Evaluated by High Resolution Mass Spectrometry
Publication date: Available online 9 July 2019Source: Food ChemistryAuthor(s): Jin-lin Li, Jun Liu, Yun-hua Ye, Ping Yang, Zong-cai TuAbstractDynamic high-pressure microfluidization (DHPM) pretreatment and glycation with lactose were employed to modify α-Lactalbumin (α-LA) with respect to the IgE/IgG binding capacities. No significant difference on incorporation ratio value of glycated α-LA was observed with and without DHPM pretreatment. However, IgE/IgG binding capacities of α-LA were decreased after glycation and DHPM pretreatment promoted the reduction. The lowest IgE/IgG binding capacities of g...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Altering the IgE Binding Capacity of King Prawn (Litopenaeus Vannamei) Tropomyosin through Conformational Changes Induced by Cold Argon-Plasma Jet
In this study, the structural modifications and allergenic response of TM in fresh king prawn as induced by cold argon plasma jet (CAPJ) were examined. The result showed that the level of α-helix structures declined as treatment time progressed, while the level of β-sheets and random coils increased. The free sulfhydryl groups decreased as CAPJ treatment progressed due to the formation of disulphide bonds while surface hydrophobicity increased until equilibrium values. In addition, after 15 min of plasma exposure, the maximum reduction recorded for IgE and IgG binding capacities were 17.6% and 26.87% respectivel...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Synthesis of Magnetic Nanoparticles to Detect Sudan Dye Adulteration in Chilli Powders
Publication date: Available online 8 July 2019Source: Food ChemistryAuthor(s): Xi Yu, Jun Kang Lee, Huilin Liu, Hongshun YangAbstractMagnetic nanoparticles were synthesised to extract Sudan dyes from chilli powders. The adsorbents used were magnetic ferroferric oxide nanoparticles coated with polystyrene. The extraction procedures for Sudan dyes comprised liquid-solid extraction and magnetic solid phase extraction. The conditions were optimised to achieve efficient magnetic solid phase extraction, including extraction and desorption time, type and volume of the desorption solvent, and the mass of the adsorbents. Repeatabil...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Mineral profile exploratory analysis for rice grains traceability
Publication date: Available online 8 July 2019Source: Food ChemistryAuthor(s): Camila Neves Lange, Lucilena Rebelo Monteiro, Bruna Moreira Freire, Daniel Fernandez Franco, Rogerio Oliveira de Souza, Cecilia Estima Sacramento dos Reis Ferreira, Julio José Centeno da Silva, Bruno Lemos BatistaAbstractRice geographical traceability requires analytical procedures and data evaluation capable of linking its composition to the producing area. In this work, major and trace elements in soil and rice grains and husk from 9 cities and 17 producers were evaluated. Arsenic species were measured solely in rice grains. The rice mi...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Chromatographic analysis of alginate degradation by five recombinant alginate lyases from Cellulophaga algicola DSM 14237
In this study, five alginate lyase genes were cloned from Cellulophaga algicola DSM 14237 genomic DNA, heterologously expressed, and characterized by using HPSEC-RI and HPAEC-PAD/MS. It was demonstrated that these analytical approaches can provide detailed information on preferred substrates, extent of hydrolysis, and the liberated products. The recombinant enzymes cleaved alginates endolytically (CaAly1, CaAly2, CaAly3) or exolytically (CaAly4, CaAly5). The three endolytic alginate lyases predominantly hydrolyzed guluronic acid-rich alginates, only CaAly1 also showed activity on mannuronic acid-rich alginates. The oligosa...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research

Relationship between structure and physicochemical properties of ginkgo starches from seven cultivars
Publication date: Available online 26 June 2019Source: Food ChemistryAuthor(s): Yan Lu, Xiaomin Zhang, Yong Yang, Yan Qi, Weizhuo Hao, Li Wang, Qiaoquan Liu, Yuping Ling, Changquan ZhangAbstractThe structures and physicochemical properties of ginkgo starches from seven cultivars were investigated and their relationships analyzed. The ginkgo starches had oval or irregular shapes, size distributions with a unimodal peak, and an A-type crystal pattern. The fine structures, crystalline structures, and physicochemical properties varied significantly among these ginkgo starches. Pearson correlation analysis and a PCA loading plo...
Source: Food Chemistry - July 17, 2019 Category: Food Science Source Type: research