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https://www.readbyqxmd.com/read/28806669/griess-reaction-based-paper-strip-for-colorimetric-fluorescent-sers-triple-sensing-of-nitrite
#1
Dan Li, Yadan Ma, Huazhen Duan, Wei Deng, Dawei Li
This study demonstrates a novel strategy for colorimetric/fluorescent/surface enhanced Raman scattering (SERS) triple-mode sensing of nitrite based on Griess reaction modulated gold nanorods (GNRs)-Azo-gold nanoparticles (GNPs) (GNRs-Azo-GNPs) assembly. The p-aminothiophenol (PATP)-capped GNRs (GNRs@PATP) and 1,8-diaminonaphthalene (DAP)-modified GNPs (GNPs@DAP) are first synthesized through Au-S and Au-N bonds, respectively. Upon being excited at 365nm, the dispersion of GNRs-GNPs (GNRs@PATP and GNPs@DAP) emits cyan fluorescence...
August 8, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28806636/blood-or-not-blood-that-is-the-question-a-non-destructive-method-for-the-detection-of-blood-contaminated-fingermarks
#2
Alfonso Bentolila, Ira Hartman, Michal Levin-Elad
Working in crime scenes presents a challenge to the forensic scientist, as some surfaces, such as floors and walls, cannot be transferred to the lab for further development and must, therefore, be processed at the crime scene itself. Two main types of latent fingermarks may be encountered in crime scenes: amino acids based and blood contaminated. One of the most common reagents, which are able to develop both types of fingermarks on porous surfaces, is ninhydrin. As blood contaminated fingermarks may be crucial in connecting the suspect to the crime it is important to be able to distinguish between them and natural fingermarks...
August 5, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28803159/telangiectasias-small-lesions-referring-to-serious-disorders
#3
REVIEW
J H Schieving, M H D Schoenaker, C M Weemaes, M van Deuren, M van der Flier, M M Seyger, M A A P Willemsen
Telangiectasias are prominent small vessels (venules, capillaries or arterioles) that are visible as small red-purple focal lesions in the skin and mucous membranes. They can serve as a cutaneous marker for a number of primary (mostly hereditary) disorders and they can be secondary to other (systemic) diseases. Patients with telangiectasias are seen by general health practitioners, pediatricians, (pediatric) neurologists, dermatologists, and ophthalmologists. In this article we give an overview of the different disorders in which telangiectasias are a prominent feature, focusing on neurocutaneous disorders in which they serve as a marker for establishing the right diagnosis...
July 29, 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/28792056/anthocyanins-in-black-rice-soybean-and-purple-corn-increase-fecal-butyric-acid-and-prevent-liver-inflammation-in-high-fat-diet-induced-obese-mice
#4
Tao Wu, Xueqi Guo, Min Zhang, Lu Yang, Rui Liu, Jinjin Yin
Epidemiological evidence indicates that anthocyanin consumption reduces the incidence of chronic and degenerative diseases. Therefore, the present study aimed to determine whether black rice anthocyanin (BRA), black soybean anthocyanin (BSA), and purple corn anthocyanin (PCA) could mitigate oxidative stress and inflammation associated obesity in C57BL/6 mice fed with a high-fat diet. BRA, BSA, or PCA was administered at doses of 200 mg kg(-1) throughout the 12-week experiment and reduced the bodyweight by 9...
August 9, 2017: Food & Function
https://www.readbyqxmd.com/read/28782017/generation-of-blue-chrysanthemums-by-anthocyanin-b-ring-hydroxylation-and-glucosylation-and-its-coloration-mechanism
#5
Naonobu Noda, Satoshi Yoshioka, Sanae Kishimoto, Masayoshi Nakayama, Mitsuru Douzono, Yoshikazu Tanaka, Ryutaro Aida
Various colored cultivars of ornamental flowers have been bred by hybridization and mutation breeding; however, the generation of blue flowers for major cut flower plants, such as roses, chrysanthemums, and carnations, has not been achieved by conventional breeding or genetic engineering. Most blue-hued flowers contain delphinidin-based anthocyanins; therefore, delphinidin-producing carnation, rose, and chrysanthemum flowers have been generated by overexpression of the gene encoding flavonoid 3',5'-hydroxylase (F3'5'H), the key enzyme for delphinidin biosynthesis...
July 2017: Science Advances
https://www.readbyqxmd.com/read/28776513/crystal-structure-and-spectroscopic-characterization-of-a-cobalt-ii-tetraazamacrocycle-completing-a-series-of-first-row-transition-metal-complexes
#6
Katherine M Van Heuvelen, Isabell Lee, Katherine Arriola, Rilke Griffin, Christopher Ye, Michael K Takase
The tetraazamacrocyclic ligand 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane (TMC) has been used to bind a variety of first-row transition metals but to date the crystal structure of the cobalt(II) complex has been missing from this series. The missing cobalt complex chlorido(1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane-κ(4)N)cobalt(II) chloride dihydrate, [CoCl(C14H32N4)]Cl·2H2O or [Co(II)Cl(TMC)]Cl·2H2O, crystallizes as a purple crystal. This species adopts a distorted square-pyramidal geometry in which the TMC ligand assumes the trans-I configuration and the chloride ion binds in the syn-methyl pocket of the ligand...
August 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/28770022/neuroprotective-and-memory-enhancing-effect-of-the-combined-extract-of-purple-waxy-corn-cob-and-pandan-in-ovariectomized-rats
#7
Woranan Kirisattayakul, Jintanaporn Wattanathorn, Sittichai Iamsaard, Jinatta Jittiwat, Bhalang Suriharn, Kamol Lertrat
The neuroprotectant and memory enhancer supplement for menopause is required due to the side effects of hormone replacement therapy. Since purple waxy corn cob and pandan leaves exert antioxidant and acetylcholinesterase inhibition (AChEI) effects, we hypothesized that the combined extract of both plants (PCP) might provide synergistic effect leading to the improved brain damage and memory impairment in experimental menopause. To test this hypothesis, female Wistar rats were ovariectomized bilaterally and orally given various doses of the functional drink at doses of 20, 40, and 80 mg/kg for 28 days...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28764096/changes-in-anthocyanidin-levels-during-the-maturation-of-color-fleshed-potato-solanum-tuberosum-l-tubers
#8
Miloslav Šulc, Zora Kotíková, Luboš Paznocht, Vladimír Pivec, Karel Hamouz, Jaromír Lachman
Certain potato cultivars are capable of producing anthocyanin pigments in the potato skin and flesh and those pigments have been shown, together with other phytochemicals, to promote good health. Six common anthocyanidins (cyanidin, delphinidin, petunidin, pelargonidin, malvidin and peonidin) were analyzed weekly for 15weeks in red- and purple-fleshed potato cultivars (Red Emma, Königspurpur, Valfi and Blaue de la Mancha) grown in field conditions using a validated LC-(+ESI)MS/MS method. Pelargonidin was the major type detected in red-fleshed cultivars whereas petunidin was the major type detected in the purple ones...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28764055/anthocyanin-biosynthesis-and-accumulation-in-blood-oranges-during-postharvest-storage-at-different-low-temperatures
#9
Lourdes Carmona, Berta Alquézar, Viviani V Marques, Leandro Peña
Blood oranges require low temperature for anthocyanin production. We have investigated the activation of anthocyanin biosynthesis and accumulation in the pulp of Moro blood and Pera blond oranges (Citrus sinensis L. Osbeck) stored at either 4 or 9°C after harvesting. Both temperatures stimulated anthocyanin accumulation in blood but not in blond oranges. Nonetheless, blood orange fruits stored at 9°C reached a darker purple coloration, higher anthocyanin contents and enhanced upregulation of genes from the flavonoid pathway in the pulp and juice than those kept at 4°C...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28763966/novel-acetylcholinesterase-inhibitors-from-zijuan-tea-and-biosynthetic-pathway-of-caffeoylated-catechin-in-tea-plant
#10
Wei Wang, Xi-Wen Fu, Xin-Long Dai, Fang Hua, Gang-Xiu Chu, Ming-Jie Chu, Feng-Lin Hu, Tie-Jun Ling, Li-Ping Gao, Zhong-Wen Xie, Xiao-Chun Wan, Guan-Hu Bao
Zijuan tea is a special cultivar of Yunnan broad-leaf tea (Camellia sinensis var. assamica) with purple buds, leaves, and stems. Phytochemical study on this tea led to the discovery of three hydroxycinnamoylated catechins (HCCs) (1-3), seven other catechins (4-10), three proanthocyanidins (11-13), five flavones and flavone glycosides (14-18), two alkaloids (19, 20), one steroid (21), and one phenylpropanoid glycoside (22). The isolation and structural elucidation of the caffeoylated catechin (1) by means of spectroscopic techniques were described...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28760424/anthocyanins-in-chokeberry-and-purple-maize-attenuate-diet-induced-metabolic-syndrome-in-rats
#11
Maharshi Bhaswant, Siti Raihanah Shafie, Michael L Mathai, Peter Mouatt, Lindsay Brown
OBJECTIVE: Increased consumption of fruits and vegetables as functional foods leads to the reduction of signs of metabolic syndrome. The aim of this study was to measure and compare cardiovascular, liver, and metabolic parameters following chronic administration of the same dose of anthocyanins either from chokeberry (CB) or purple maize (PM) in rats with diet-induced metabolic syndrome. METHODS: Male Wistar rats were fed a maize starch (C) or high-carbohydrate, high-fat diet (H) and divided into six groups for 16 wk...
September 2017: Nutrition
https://www.readbyqxmd.com/read/28759392/a-3-week-old-with-an-isolated-blueberry-muffin-rash
#12
John B Darby, Gregory Valentine, Kirsty Hillier, Raegan Hunt, C Mary Healy, Valeria Smith, Wendy Allen-Rhoades
A 3-week-old boy, former 39-week term infant, presented to the emergency department with a rash. One week before presentation, he developed dark, purple papules on his forehead, which then spread to the abdomen and inguinal regions. Throughout this time, he was eating well, gaining weight, developing appropriately, and was afebrile without cough, congestion, or rhinorrhea. On presentation, the patient was well appearing with normal vital signs. His weight was 4.83 kg (86th percentile for age), his length was 56 cm (47th percentile for age), and his head circumference was 37 cm (62nd percentile for age)...
July 2017: Pediatrics
https://www.readbyqxmd.com/read/28759152/anthocyanins-from-purple-corn-ameliorated-tnf-%C3%AE-induced-inflammation-and-insulin-resistance-in-3t3-l1-adipocytes-via-activation-of-insulin-signaling-and-enhanced-glut4-translocation
#13
Diego Luna-Vital, Matthew Weiss, Elvira Gonzalez de Mejia
SCOPE: The aim was to compare the effect of an anthocyanin-rich extract from purple corn pericarp (PCW) and pure anthocyanins on adipogenesis, inflammation and insulin resistance in 3T3-L1 adipocytes on basal and inflammatory conditions. METHODS AND RESULTS: Preadipocytes (3T3-L1) were treated during differentiation with or without PCW. Differentiated adipocytes were treated either individually or in combination with tumor necrosis factor TNF-α and PCW, or pure C3G, Pg3G, P3G...
July 31, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28755629/abscisic-acid-treatment-alleviates-cadmium-toxicity-in-purple-flowering-stalk-brassica-campestris-l-ssp-chinensis-var-purpurea-hort-seedlings
#14
Guoming Shen, Jiankang Niu, Zhenxu Deng
The aim of this research was to investigate how exogenous abscisic acid (ABA) alleviates cadmium (Cd) toxicity in purple flowering stalk (Brassica campestris L. ssp. chinensis) and evaluate whether it could be a potential choice for phytoremediation. Purple flowering stalk seedlings were cultivated in a hydroponic system with Cd at various concentrations (0-100 μmol L(-1)) as controls and Cd plus ABA as the treatment in the growth media. The soluble proteins, chlorophyll contents and the activity of the antioxidant enzyme system were determined by previously established biochemical methods...
July 20, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28749430/evaluation-of-the-nutritional-quality-of-chinese-kale-brassica-alboglabra-bailey-using-uhplc-quadrupole-orbitrap-ms-ms-based-metabolomics
#15
Ya-Qin Wang, Li-Ping Hu, Guang-Min Liu, De-Shuang Zhang, Hong-Ju He
Chinese kale (Brassica alboglabra Bailey) is a widely consumed vegetable which is rich in antioxidants and anticarcinogenic compounds. Herein, we used an untargeted ultra-high-performance liquid chromatography (UHPLC)-Quadrupole-Orbitrap MS/MS-based metabolomics strategy to study the nutrient profiles of Chinese kale. Seven Chinese kale cultivars and three different edible parts were evaluated, and amino acids, sugars, organic acids, glucosinolates and phenolic compounds were analysed simultaneously. We found that two cultivars, a purple-stem cultivar W1 and a yellow-flower cultivar Y1, had more health-promoting compounds than others...
July 27, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28745869/high-resolution-imaging-and-multiparametric-characterization-of-native-membranes-by-combining-confocal-microscopy-an-atomic-force-microscopy-based-toolbox
#16
Pawel R Laskowski, Moritz Pfreundschuh, Mirko Stauffer, Zöhre Ucurum, Dimitrios Fotiadis, Daniel J Müller
To understand how membrane proteins function requires characterizing their structure, assembly, and inter- and intramolecular interactions in physiologically relevant conditions. Conventionally, such multiparametric insight is revealed by applying different biophysical methods. Here we introduce the combination of confocal microscopy, force-distance curve-based (FD-based) atomic force microscopy (AFM), and single-molecule force spectroscopy (SMFS) for the identification of native membranes and the subsequent multiparametric analysis of their membrane proteins...
August 1, 2017: ACS Nano
https://www.readbyqxmd.com/read/28739132/colorimetric-sensing-of-selenocystine-using-gold-nanoparticles
#17
Liyang Liu, Xia Wang, Juan Yang, Yan Bai
We present a highly selective and sensitive colorimetric method for the detection of selenocystine (SeCys) coexisting with other amino acids, especially cysteine (Cys) using the gold nanoparticles (AuNPs). Firstly, Cys was oxidized to cystine (Cys-Cys) by dissolved oxygen under Cu(2+) catalysis in the pre-reaction, which eliminated the interference of Cys in the SeCys sensing process. Then SeCys induced the rapid aggregation of AuNPs through Au-Se bond and complex formation of Cu(2+)-SeCys in the colorimetric reaction, in which the color change of AuNPs from red to blue or purple with the naked eye detection or with a UV-vis spectrophotometric determination...
July 21, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28732465/genome-wide-signals-of-positive-selection-in-strongylocentrotid-sea-urchins
#18
Kord M Kober, Grant H Pogson
BACKGROUND: Comparative genomics studies investigating the signals of positive selection among groups of closely related species are still rare and limited in taxonomic breadth. Such studies show great promise in advancing our knowledge about the proportion and the identity of genes experiencing diversifying selection. However, methodological challenges have led to high levels of false positives in past studies. Here, we use the well-annotated genome of the purple sea urchin, Strongylocentrotus purpuratus, as a reference to investigate the signals of positive selection at 6520 single-copy orthologs from nine sea urchin species belonging to the family Strongylocentrotidae paying careful attention to minimizing false positives...
July 21, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28730325/single-stage-photofermentative-biohydrogen-production-from-sugar-beet-molasses-by-different-purple-non-sulfur-bacteria
#19
Emrah Sagir, Ebru Ozgur, Ufuk Gunduz, Inci Eroglu, Meral Yucel
Biohydrogen production via fermentative routes offers considerable advantages in waste recycling and sustainable energy production. This can be realized by single-stage dark or photofermentative processes, or by a two-stage integrated process; the latter offering the higher production yields due to complete conversion of sugar substrates into H2 and CO2. However, problems arising from the integration of these two processes limit its scale-up and implementation. Hence, high efficiency one-step fermentative biohydrogen production processes from sugar-rich wastes are preferable...
July 20, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28726757/characterization-of-essential-oil-composition-in-different-basil-species-and-pot-cultures-by-a-gc-ms-method
#20
Andrea Muráriková, Anton Ťažký, Jarmila Neugebauerová, Alexandra Planková, Josef Jampílek, Pavel Mučaji, Peter Mikuš
Basil (Ocimum L.) species are used as medicinal plants due to their essential oils exhibiting specific biological activity. The present work demonstrated that both the variety and season/conditions of cultivation had a significant effect on (i) the produced amount (extraction yield), (ii) qualitative, as well as (iii) quantitative profile of basil essential oil. Among studied basil varieties, a new variety, 'Mánes', was characterized for the first time. Based on our quantitative evaluation of GC-MS profiles, the following chemotypes and average concentrations of a main component were detected in the studied basil varieties: 'Ohře', 'Lettuce Leaf', 'Purple Opaal', 'Dark Green' (linalool, 5...
July 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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