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Food dye

Sherri B Turnipseed, Joseph M Storey, I-Lin Wu, Charles M Gieseker, Nicholas R Hasbrouck, Tina C Crosby, Wendy C Andersen, Shanae Lanier, Christine R Casey, Robert Burger, Mark R Madson
The ability to detect chemical contaminants, including veterinary drug residues in animal products such as fish, is an important example of food safety analysis. In this paper, a liquid chromatography high-resolution mass spectrometry (LC-HRMS) screening method using a quadrupole-Orbitrap instrument was applied to the analysis of veterinary drug residues in incurred tissues from aquacultured channel catfish, rainbow trout, and Atlantic salmon and imported aquacultured products including European eel, yellow croaker, and tilapia...
February 14, 2018: Analytical and Bioanalytical Chemistry
Thangavelu Krithiga, Xavier Janet Sabina, Baskaran Rajesh, Hamid Ilbeygi, Adka Nityananda Shetty, Ramanjaneya Reddy, Jayabalan Karthikeyan
Activated carbon was synthesized from cooked food waste, especially dehydrated rice kernels, by chemical activation method using NaOH and KOH as activating agents. It was then characterized by ultimate and proximate analysis, BET surface analysis, XRD, FTIR, Raman and SEM. The XRD patterns and Raman spectra confirmed the amorphous nature of the prepared activated carbons. Ultimate analysis showed an increase in the carbon content after activation of the raw carbon samples. Upon activation with NaOH and KOH, the surface area of the carbon sample was found to have increased from 0...
June 1, 2018: Journal of Nanoscience and Nanotechnology
Ming Wu, Lijuan Sun, Kesong Miao, Yingzhong Wu, Li-Juan Fan
Developing effective methods for detecting illegal additives in food or seasoning is of great significance. In this study, a sensing strategy for selective detection of Sudan dyes was designed based on fluorescence inner filter effect (IFE) by using poly(phenylenevinylene) (PPV) solid materials and combing with optimized experimental protocol. Two types of fluorescent solid materials, electrospun fibrous membranes and drop-cast films, were fabricated with PPV as the fluorophore and poly(vinyl alcohol) (PVA) as the matrix...
February 13, 2018: ACS Applied Materials & Interfaces
Diksha Bhatt, Krati Vyas, Shakuntala Singh, P J John, Inderpal Soni
Tartrazine is a synthetic lemon yellow azo dye primarily used as a food coloring. The present study aimed to screen the neurobiochemical effects of Tartrazine in Wistar rats after administering the Acceptable Daily Intake (ADI) level. Tartrazine (7.5 mg/kg b.w.) was administered to 21 day old weanling rats through oral gavage once daily for 40 consecutive days. On 41st day, the animals were sacrificed and brain sub regions namely, frontal cortex, corpus striatum, hippocampus and cerebellum were used to determine activities of anti-oxidant enzymes viz...
February 7, 2018: Food and Chemical Toxicology
Laura Purevdorj-Gage, Brian Nixon, Kyle Bodine, Qilong Xu, William T Doerrler
A method for microscopic enumeration of viable Salmonella enterica in meat samples was developed by using the LIVE/DEAD BacLight kit technology. A two-step centrifugation and wash process was developed to clean the samples from food and chemical impurities that might otherwise interfere with the appropriate staining reactions. The accuracy of the BacLight kit-based viability assessments was confirmed with various validation tests that were conducted by following the manufacturer's instructions. For the biocide challenge tests, chicken parts each bearing around 8...
February 8, 2018: Journal of Food Protection
Ali Akgul, Ayfer Akgul, Serdar G Senol, Hasan Yildirim, Ozcan Secmen, Yunus Dogan
BACKGROUND: Studies of ethnobotanical usages in south-eastern Turkey are rare. To widen this field of knowledge, we conducted an ethnobotanical study in Midyat (Mardin Province), Turkey. METHODS: The field study was completed during three years (2007-2010). Our aim was to document the ethnobotanical uses of local plants and to make an ethnobotanical inventory of uncommon plants using qualitative interviews. RESULTS: During field studies, 368 voucher specimens were collected in the investigated area...
February 7, 2018: Journal of Ethnobiology and Ethnomedicine
Yue Yao, Wen Wang, Kangzhen Tian, Whitney Marvella Ingram, Jie Cheng, Lulu Qu, Haitao Li, Caiqin Han
Allura Red (AR) is a highly stable synthetic red azo dye, which is widely used in the food industry to dye food and increase its attraction to consumers. However, the excessive consumption of AR can result in adverse health effects to humans. Therefore, a highly reproducible silver nanorod (AgNR) array was developed for surface enhanced Raman scattering (SERS) detection of AR in candy. The relative standard deviation (RSD) of AgNR substrate obtained from the same batch and different batches were 5.7% and 11...
January 30, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Hema Suryawanshi, Rupali Naik, Pramod Kumar, Rolly Gupta
Background: Eosin is most widely used synthetic dye belonging to the xanthene group. These dyes are efficient but are hazardous to human and animal health. With the increasing awareness of a green earth, it is advisable to use more of eco-friendly and biodegradable material which can be effectively achieved by the use of natural dyes obtained from plants and other natural sources. Turmeric, available as Curcuma longa (domestic), has long been in use in the subcontinent as a spice and flavoring agent in most food preparations...
September 2017: Journal of Oral and Maxillofacial Pathology: JOMFP
Leonor Pereira, Sónia Gomes, Sara Barrias, José Ramiro Fernandes, Paula Martins-Lopes
Olive oil and wine production have a worldwide economic impact. Their market reliability is under great concern because of the increasing number of fraud and adulteration attempts. The need for a traceability system in all its extension is crucial particularly for the cases of olive oils and wines with certified labels, in which only a limited number of olives and grapevine varieties, respectively, are allowed in a restricted well-defined geographical area. Molecular markers have been vastly applied to the food sector, and in particular High-Resolution DNA Melting technology has been successfully applied for olive oil and wine authentication, as part of the traceability system...
January 2018: Food Research International
Yunyun Wang, Jixiang Wang, Rujia Cheng, Lin Sun, Xiaohui Dai, Yongsheng Yan
An imprinted fluorescent sensor was fabricated based on SiO2 nanoparticles encapsulated with molecular imprinted polymer containing allyl fluorescein. High fluorine cypermethirin as template molecules, methyl methacrylate as functional monomer, and allyl fluorescein as optical materials synthesized a core-shell fluorescent molecular imprinted sensor, which showed a high and rapid sensitivity and selectivity for the detection of τ-fluvalinate. The sensor presented appreciable sensitivity with a limit of 13...
February 1, 2018: Journal of Separation Science
Daeyeop Lee, Joo-Hyon Kim, Taksoo Kim, Hyojung Yoon, Areum Jo, Byeongwoo Lee, Hyunwoo Lim, Pilje Kim, Jungkwan Seo
Reliable exposure factors are essential to determine health risks posed by chemicals in consumer products. We analyzed five risk-concerned product categories (anti-fogging, dye, disinfectant, repellent, and preservative products) for 13 products (three car anti-fogging products, a lens anti-fogging product, two car dye products, two drain disinfectants, an air conditioner disinfectant, a chlorine-based disinfectant, a fabric repellent, an insect repellent for food, and a wood preservative) considered to be of high risk in order to determine exposure factors via web surveys and estimation of amount of product...
January 30, 2018: International Journal of Environmental Research and Public Health
Vijay Krishna, Wei Bai, Zhao Han, Akihiro Yano, Abhinav Thakur, Angelina Georgieva, Kristy Tolley, Joseph Navarro, Ben Koopman, Brij Moudgil
Pristine titanium dioxide (TiO2) absorbs ultraviolet light and reflects the entire visible spectrum. This optical response of TiO2 has found widespread application as white pigments in paper, paints, pharmaceuticals, foods and plastic industries; and as a UV absorber in cosmetics and photocatalysis. However, pristine TiO2 is considered to be inert under visible light for these applications. Here we show for the first time that a bacterial contaminant (Staphylococcus aureus-a MRSA surrogate) in contact with TiO2 activates its own photocatalytic degradation under visible light...
January 30, 2018: Scientific Reports
A C Maganha de Almeida, J Backhaus, C R Corso
A residual liquid inoculum (RLI) was used to decolourise solutions of Acid Yellow 25 (AY25) and Direct Violet 51 (DV51) azo dyes. The RLI was obtained through anaerobic digestion of food waste from a university restaurant. The concentration of bacteria in the RLI was 8.45 × 107 CFU mL-1. Dye solutions (50 μg mL-1) were inoculated with the RLI (20% v/v) and incubated at room temperature. The decolourisation studies took place at microaerophilic and in-batch conditions and at pH = 2.50. Initially, the dyes were taken up from solution by biosorption; maximum colour removal was achieved after 3 hours of incubation, with 88...
January 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Lourdes Morales-Oyervides, Jorge Oliveira, Maria Sousa-Gallagher, Alejandro Méndez-Zavala, Julio Cesar Montañez
The high production yields of pigments by Talaromyces spp. and their high thermal stability have implied that industrial application interests may emerge in the food and textile industries, as they both involve subjecting the colourants to high temperatures. The present study aimed to assess the potential application of the pigments produced by Talaromyces spp. in the textile area by studying their dyeing properties. Dyeing studies were performed on wool. The dyeing process consisted of three stages: scouring, mordanting, and dyeing...
July 5, 2017: Journal of Fungi (Basel, Switzerland)
Pravin Shende, Pooja Kasture, R S Gaud
Nanoflowers are a newly developed class of nanoparticles showing structure similar to flower and gaining much attention due to their simple method of preparation, high stability and enhance efficiency. This article focuses on advantages, disadvantages, method of synthesis, types and applications of nanoflowers with futuristic approaches. The applications of nanoflower include its use as a biosensor for quick and precise detection of conditions like diabetes, Parkinsonism, Alzheimer, food infection, etc. Nanoflowers have been revealed for site-specific action and controlled delivery of drugs...
January 23, 2018: Artificial Cells, Nanomedicine, and Biotechnology
Meng-Lei Xu, Yu Gao, Yali Li, Xueliang Li, Huanjie Zhang, Xiao Xia Han, Bing Zhao, Liang Su
Glyphosate is one of the most commonly-used and non-selective herbicides in agriculture, which may directly pollute the environment and threaten human health. A simple and effective approach to assessment of its damage to the natural environment is thus quite necessary. However, traditional chromatography-based detection methods usually suffer from complex pretreatment procedures. Herein, we propose a simple and sensitive method for the determination of glyphosate by combining ninhydrin reaction and surface-enhanced Raman scattering (SERS) spectroscopy...
January 5, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Zhiyuan Jia, Issa Sukker, Mareike Müller, Holger Schönherr
This work reports on a new approach to rapidly and selectively detect and discriminate enzymes of pathogenic from those of non-pathogenic bacteria using a patterned autonomously reporting hydrogel on a transparent support, in which the selectivity has been encoded by pattern shape to enable facile detection by a color change at one single wavelength. In particular, enzyme-responsive chitosan hydrogel layers that report the presence of the enzymes β-glucuronidase (β-Gus) and β-galactosidase (β-Gal), produced by the non-virulent Escherichia coli K12 (E...
January 18, 2018: ACS Applied Materials & Interfaces
Marushka L Silveira, Bruce A Dye, Timothy J Iafolla, Margo R Adesanya, Shahdokht Boroumand, Marston E Youngblood, Christian R Salazar, Tracy L Finlayson, Tasneem Khambaty, Shirley M Beaver, A Isabel Garcia
OBJECTIVE: Research on the relationships between acculturation, ethnic identity, and oral health-related quality of life (OHRQOL) among the U.S. Hispanic/Latino population is sparse. The aim of this study is to examine the association between acculturation, ethnic identity, and OHRQOL among 13,172 adults in the 2008-2011 Hispanic Community Health Study/Study of Latinos (HCHS/SOL). DESIGN: Participants self-reported their acculturation (immigrant generation, birthplace, residence in the U...
January 18, 2018: Ethnicity & Health
Maressa Maria de Melo Santos, Marta Maria Menezes Bezerra Duarte, Graziele Elisandra do Nascimento, Natalya Barbosa Guedes de Souza, Otidene Rossiter Sá da Rocha
This work proposes the use of plastic residues, more specifically polystyrene packaging, to support TiO2, used as a photocatalyst in the degradation of erythrosine and Brilliant Blue food dyes. The scanning electron microscopy and Fourier transform infrared spectroscopy analyses exhibited the surface coating and the presence of TiO2 in the material, respectively. The UV/H2O2/TiO2((SP)supported) process was used in the preliminary study, given the high percentage of degradation, operational advantages and greater reductions in peaks related to the aromatic rings when compared to the other processes studied...
January 12, 2018: Environmental Technology
Bi-Shen Lee, Pi-Chen Lin, Ding-Zheng Lin, Ta-Jen Yen
We present a three-dimensional patterned (3DP) multifunctional substrate with the functions of ultra-thin layer chromatography (UTLC) and surface enhanced Raman scattering (SERS), which simultaneously enables mixture separation, target localization and label-free detection. This multifunctional substrate is comprised of a 3DP silicon nanowires array (3DP-SiNWA), decorated with silver nano-dendrites (AgNDs) atop. The 3DP-SiNWA is fabricated by a facile photolithographic process and low-cost metal assisted chemical etching (MaCE) process...
January 11, 2018: Scientific Reports
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