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Food dye

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
Anirban Basu, Gopinatha Suresh Kumar
Interaction of two food colorant dyes, amaranth and tartrazine, with lysozyme was studied employing multiple biophysical techniques. The dyes exhibited hypochromic changes in the presence of lysozyme. The intrinsic fluorescence of lysozyme was quenched by both dyes; amaranth was a more efficient quencher than tartrazine. The equilibrium constant of amaranth was higher than that of tartarzine. From FRET analysis, the binding distances for amaranth and tartrazine were calculated to be 4.51 and 3.93 nms, respectively...
January 17, 2017: Journal of Physical Chemistry. B
Yong Ye, Yang Zheng, Chendong Ji, Jie Shen, Meizhen Yin
Animal cells have complicated dynamics of cell membrane structures which require desirable dyes to in vivo imaging. Here, an asymmetric amphiphilic zwitterionic perylenediimide (ZP) has been constructed by introducing an octyl chain and a zwitterionic head to each imide position of perylenediimide chromophore. ZP can self-assemble into vesicles in aqueous solution. The aggregated ZP vesicles have been explored to image cell inner or surface membrane structures by controlled disassembly process. The ZP vesicles, when are uptaken into cells, disassemble into single molecules and incorporate into cell inner membranes...
January 17, 2017: ACS Applied Materials & Interfaces
Dorota Walkowiak-Tomczak, Janusz Czapski, Karolina Młynarczyk
BACKGROUND: Elderberries are a source of dietary supplements and bioactive compounds, such as anthocyanins. These dyes are used in food technology. The aim of the study was to assess the changes in colour parameters, anthocyanin contents and sensory attributes in solutions of elderberry juice concentrates during storage in a model system and to determine predictability of sensory attributes of colour in solutions based on regression equations using the response surface methodology. METHODS: The experiment was carried out according to the 3-level factorial design for three factors...
July 2016: Acta Scientiarum Polonorum. Technologia Alimentaria
Christian Steffen
Red yeast rice is the fermentation product of the mould Monascus ruber and is traditionally used in East Asia to dye and conserve food. Its main pharmacologically active compound, monakolin K, was isolated from red yeast rice and is used as an inhibitor of cholesterol synthesis under the INN lovastatin. Lovastatin and several other statins are marketed as drugs whereas red yeast rice is offered as a food supplement. As statins can cause severe side effects, such as muscle damage and kidney failure, the dosing and information about interactions with drugs and food is essential for the use of these products...
January 4, 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
I Oraiqat, A Rehemtulla, K Lam, R Clarke, R Ten Haken, I El Naqa
PURPOSE: Cerenkov emission (CE) is a promising tool for online tumor microenvironment interrogation and targeting during radiotherapy. In this work, we utilize CE generated during radiotherapy as a broadband excitation source for real-time absorption spectroscopy. We demonstrate the feasibility of CE spectroscopy using a controlled experiment of materials with known emission/absorption properties. METHODS: A water tank is irradiated with 20 MeV electron beam to induce Cerenkov emission...
June 2016: Medical Physics
Wen Cai, Haiyan Gao, Chengchao Chu, Xiaoyong Wang, Junqing Wang, Pengfei Zhang, Gan Lin, Wengang Li, Gang Liu, Xiaoyuan Chen
Many photo-responsive dyes have been utilized as imaging and photodynamic/photothermal therapy agents. Indocyanine green (ICG) is the only near-infrared region (NIR) organic dye for clinical applications approved by the United States Food and Drug Administration; however, the clinical application of ICG is limited by its poor aqueous solubility, low cancer specificity, and low sensitivity in cancer theranostics. To overcome these issues, a multifunctional nanoplatform based on hyaluronic acid (HA) and ICG-engineered metal-organic framework MIL-100(Fe) nanoparticles (MOF@HA@ICG NPs) was successfully developed for imaging-guided, anti-cancer photothermal therapy (PTT)...
December 29, 2016: ACS Applied Materials & Interfaces
Asa Osuga, Yoko Uematsu, Yukiko Yamajima, Takushi Fujiwara, Shoichi Tahara, Hiroyuki Miyakawa, Toshiko Mizumachi, Kimio Monma
The effect of pH of the clean-up process in the analysis of 11 permitted tar dyes in high protein food was investigated by using a handmade polyamide column (PA column) and Oasis HLB. Boiled fish paste spiked with the 11 dyes was extracted with appropriate solvents and the pH of the extract was adjusted to 3.0-7.0 in increments of 0.5, followed by clean-up with the PA column. At pH 3.0-5.5, precipitate formed in the extract clogged the column, and the recoveries of R3, R104 and R105 were 26-68%. At pH 6.0-7...
2016: Shokuhin Eiseigaku Zasshi. Journal of the Food Hygienic Society of Japan
Yuzo Nishizaki, Kyoko Ishizuki, Hiroshi Akiyama, Atsuko Tada, Naoki Sugimoto, Kyoko Sato
Lac dye and cochineal extract contain laccaic acids and carminic acid as the main pigments, respectively. Both laccaic acids and carminic acid are anthraquinone derivatives. 4-Aminocarminic acid (acid-stable carmine), an illegal colorant, has been detected in several processed foods. 4-Aminocarminic acid is obtained by heating cochineal extract (carminic acid) in ammonia solution. We attempted to prepare ammonia-treated lac dye and to identify the structures of the main pigment components. Ammonia-treated lac dye showed acid stability similar to that of 4-aminocarminic acid...
2016: Shokuhin Eiseigaku Zasshi. Journal of the Food Hygienic Society of Japan
Amir H Dorafshar, Gerhard S Mundinger, Brent Robinson, Sami Tuffaha, Gerald Brandacher, Patrick Byrne, Robert L Walton
Background The science and technical acumen in the field of vascularized composite allotransplantation has progressed rapidly over the past 15 years, and transplantation of specialized units of the face, such as the nose, appears possible. No study to date has evaluated the technical feasibility of isolated nasal unit transplantation (NUT). In this study, we explore the anatomy and technical specifics of NUT. Methods In this study, four fresh cadaver heads were studied. Bilateral vascular pedicle dissections were performed in each cadaver...
December 26, 2016: Journal of Reconstructive Microsurgery
Mingqiu Shan, Sheng Yu, Hui Yan, Peidong Chen, Li Zhang, Anwei Ding
Rubia cordifolia Linn (Rubiaceae) is a climbing perennial herbal plant, which is widely distributed in China and India. Its root and rhizome, Rubiae Radix et Rhizoma (called Qiancao in China and Indian madder in India), is a well known phytomedicine used for hematemesis, epistaxis, flooding, spotting, traumatic bleeding, amenorrhea caused by obstruction, joint impediment pain, swelling and pain caused by injuries from falls. In addition, it is a kind of pigment utilized as a food additive and a dye for wool or fiber...
December 20, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Emanuele F Lessa, Matheus S Gularte, Emanuel S Garcia, André R Fajardo
Eco-friendly pectin and pectin/cellulose microfibers beads (PB and PB-CF) were synthesized using compounds extracted from orange bagasse, a solid waste from the food industry. PB-CF beads showed remarkable differences regarding several properties as compared to the beads without CF. The adsorption capability of PB and PB-CF was tested towards the removal of methylene blue (MB) from aqueous solution. The effect of various parameters on the MB adsorption was investigated. The kinetics and mechanism of adsorption were explained by the pseudo-second-order kinetics and intra-particle diffusion models...
February 10, 2017: Carbohydrate Polymers
Keehoon Won, Nan Young Jang, Junsu Jeon
Intelligent food packaging can provide consumers with reliable and correct information on the quality and safety of packaged foods. One of the key constituents in intelligent packaging is a colorimetric oxygen indicator, which is widely used to detect oxygen gas involved in food spoilage by means of a color change. Traditional oxygen indicators consisting of redox dyes and strong reducing agents have two major problems: they must be manufactured and stored under anaerobic conditions because air depletes the reductant, and their components are synthetic and toxic...
December 28, 2016: Journal of Agricultural and Food Chemistry
Gregory N Goblick, Yaping Ao, Julie M Anbarchian, Kevin R Calci
Since 1925, dilution analysis has been used to minimize pathogenic impacts to bivalve molluscan shellfish growing areas from treated wastewater effluent in the National Shellfish Sanitation Program (NSSP). For over twenty five years, the U.S. Food and Drug Administration (FDA) has recommended a minimum of 1000:1 dilution of effluent within prohibited closure zones established around wastewater treatment plant (WWTP) discharges. During May 2010, using recent technologies, a hydrographic dye study was conducted in conjunction with a pathogen bioaccumulation study in shellfish adjacent to a WWTP discharge in Yarmouth, ME...
December 9, 2016: Marine Pollution Bulletin
Fatih Deniz, Remziye Aysun Kepekci
A green type composite biosorbent composed of pine, oak, hornbeam and fir sawdust biomasses modified with cetyltrimethylammonium bromide (CTAB) was used for biosorption of an unsafe synthetic food dye, Food Green 3 from liquid medium. Batch studies were carried by observing the effects of pH, dye concentration, biosorbent amount and contact time. The equilibrium data were analyzed using Freundlich, Langmuir and Dubinin-Radushkevich equations. Freundlich model gave a better conformity than other equations. The maximum dye removal potential of biosorbent was found to be 36...
December 12, 2016: International Journal of Phytoremediation
Alicia Rodríguez, Juan J Córdoba, Mar Rodríguez, María J Andrade
Multiplex PCR-based methods for simultaneous detection and quantification of different mycotoxin-producing Penicillia are useful tools to be used in food safety programs. These rapid and sensitive techniques allow taking corrective actions during food processing or storage for avoiding accumulation of mycotoxins in them. In this chapter, three multiplex PCR-based methods to detect at least patulin- and ochratoxin A-producing Penicillia are detailed. Two of them are different multiplex real-time PCR suitable for monitoring and quantifying toxigenic Penicillium using the nonspecific dye SYBR Green and specific hydrolysis probes (TaqMan)...
2017: Methods in Molecular Biology
Natalie R Schellpfeffer, Harvey L Leo, Michael Ambrose, Andrew N Hashikawa
BACKGROUND: Pediatric campers with food allergies are at greater risk for exposure and anaphylaxis. A diagnosis of asthma increases risk for anaphylaxis. Epidemiological investigations of food-allergic children at high risk for allergic reactions requiring intervention in camp settings are lacking. OBJECTIVE: The objectives of this study were to estimate the prevalence of food allergies among otherwise healthy campers in summer camps throughout the United States and Canada, and to assess asthma comorbidity and determine rates of epinephrine autoinjector prescriptions present in this population...
December 3, 2016: Journal of Allergy and Clinical Immunology in Practice
Dexin Zeng, Zi Chen, Yuan Jiang, Feng Xue, Baoguang Li
Foodborne outbreaks are a serious public health and food safety concern worldwide. There is a great demand for rapid, sensitive, specific, and accurate methods to detect microbial pathogens in foods. Conventional methods based on cultivation of pathogens have been the gold standard protocols; however, they take up to a week to complete. Molecular assays such as polymerase chain reaction (PCR), sequencing, microarray technologies have been widely used in detection of foodborne pathogens. Among molecular assays, PCR technology [conventional and real-time PCR (qPCR)] is most commonly used in the foodborne pathogen detection because of its high sensitivity and specificity...
2016: Frontiers in Microbiology
Tuane Cristina Dos Santos, Guilherme Julião Zocolo, Daniel Alexandre Morales, Gisela de Aragão Umbuzeiro, Maria Valnice Boldrin Zanoni
No abstract text is available yet for this article.
January 2017: Food and Chemical Toxicology
Kimberley S Samkoe, Jason R Gunn, Kayla Marra, Sally M Hull, Karen L Moodie, Joachim Feldwisch, Theresa V Strong, Daniel R Draney, P Jack Hoopes, David W Roberts, Keith Paulsen, Brian W Pogue
PURPOSE: ABY-029, a synthetic Affibody peptide, Z03115-Cys, labeled with a near-infrared fluorophore, IRDye® 800CW, targeting epidermal growth factor receptor (EGFR) has been produced under good manufacturing practices for a US Food and Drug Administration-approved first-in-use human study during surgical resection of glioma, as well as other tumors. Here, the pharmacology, phototoxicity, receptor activity, and biodistribution studies of ABY-029 were completed in rats, prior to the intended human use...
December 1, 2016: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
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