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https://www.readbyqxmd.com/read/28221047/excited-state-proton-transfer-in-indigo
#1
Joao Pina, Daniela Santos Sarmento, Marco Accoto, Pier Luigi Gentili, Luigi Vaccaro, Adelino M Galvão, J Sérgio Seixas de Melo
Excited state proton transfer (ESPT) in Indigo (Ind) and its mono hexyl-substituted derivative (NHxInd) in solution was investigated experimentally as a function of solvent viscosity, polarity and temperature, and theoretically by time-dependent DFT (TDDFT) calculations. Although a single emission band is observed, the fluorescence decays (collected at different wavelengths along the emission band using time-correlated single photon counting (TCSPC)) are bi-exponential, with two identical decay times but different pre-exponential factors, consistent with the existence of excited state keto and enol species...
February 21, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28207252/metal-metal-bridging-using-the-dppp-dye-system-electronic-configurations-within-multiple-redox-series
#2
Arijit Singha Hazari, Abhishek Mandal, Katharina Beyer, Alexa Paretzki, Wolfgang Kaim, Goutam Kumar Lahiri
Redox series [LnRu(μ-DPPP)RuLn](k), H2DPPP = 2,5-dihydro-3,6-di-2-pyridylpyrrolo(3,4-c)pyrrole-1,4-dione and L = 2,4-pentanedionato (acac(-)), 2,2'-bipyridine (bpy), and 2-phenylazopyridine (pap), have been studied by voltammetry (CV, DPV), EPR, and UV-vis-NIR spectroelectrochemistry, supported by TD-DFT calculations. Crystal structure analysis and (1)H NMR revealed oxidation states [(acac)2Ru(III)(μ-DPPP(2-))Ru(III)(acac)2] and [(bpy)2Ru(II)(μ-DPPP(2-))Ru(II)(bpy)2](2+) for the corresponding precursors, isolated as rac diastereomers...
February 16, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28199929/identification-of-natural-red-and-purple-dyes-on-textiles-by-fiber-optics-reflectance-spectroscopy
#3
M A Maynez-Rojas, E Casanova-González, J L Ruvalcaba-Sil
Understanding dye chemistry and dye processes is an important issue for studies of cultural heritage collections and science conservation. Fiber Optics Reflectance Spectroscopy (FORS) is a powerful technique, which allows preliminary dye identification, causing no damage or mechanical stress on the artworks subjected to analysis. Some information related to specific light scattering and absorption can be obtained in the UV-visible and infrared range (300-1400nm) and it is possible to discriminate the kind of support fiber in the near infrared region (1000-2500nm)...
February 9, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28183053/an-efficient-adsorption-of-indigo-carmine-dye-from-aqueous-solution-on-mesoporous-mg-fe-layered-double-hydroxide-nanoparticles-prepared-by-controlled-sol-gel-route
#4
M A Ahmed, A A Brick, A A Mohamed
A new approach for removal of indigo carmine blue (IC) dye which is extensively used in jeans manufacture was successfully performed on novel mesoporous [LDH] nanoparticles prepared by sol-gel route using CTAB as shape and pore directing agent. The physicochemical features were monitored by X-ray diffraction (XRD), Fourier transformer infra-red (FTIR), N2 adsorption-desorption isotherm, Field emission electron microscope (FESEM) and high resolution transmission electron microscope (HRTEM). The influence of reaction parameters affecting dye adsorption including contact time, initial dye concentration, pH and temperature were investigated...
February 2, 2017: Chemosphere
https://www.readbyqxmd.com/read/28165773/greenhouse-gas-emissions-from-a-cu-contaminated-soil-remediated-by-in-situ-stabilization-and-phytomanaged-by-a-mixed-stand-of-poplar-willows-and-false-indigo-bush
#5
M Šimek, D Elhottová, M Mench, L Giagnoni, P Nannipieri, G Renella
Phytomanagement of trace element-contaminated soils can reduce the soil toxicity and restore the soil ecological functions, including the soil gas exchange with the atmosphere. We studied the emission rate of the greenhouse gases (GHG) CO2, CH4 and N2O, and the potential CH4 oxidation, denitrification activity (DEA) and glucose mineralization of a Cu-contaminated soil amended with dolomitic limestone and compost, alone or in combination, after a 2 year-phytomanagement with a mixed stand of Populus nigra, Salix viminalis, S...
February 6, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28134295/solar-pumping-upconversion-of-interfacial-coordination-nanoparticles
#6
Ayumi Ishii, Miki Hasegawa
An interfacial coordination nanoparticle successfully exhibited an upconversion blue emission excited by very low-power light irradiation, such as sunlight. The interfacial complex was composed of Yb ions and indigo dye, which formed a nano-ordered thin shell layer on a Tm2O3 nanoparticle. At the surface of the Tm2O3 particle, the indigo dye can be excited by non-laser excitation at 640 nm, following the intramolecular energy transfer from the indigo dye to the Yb ions. Additionally, the excitation energy of the Yb ion was upconverted to the blue emission of the Tm ion at 475 nm...
January 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28124753/a-turn-on-fluorescent-sensor-for-ozone-detection-in-ambient-air-using-protein-directed-gold-nanoclusters
#7
Di Wu, Wenjing Qi, Chun Liu, Qing Zhang
A "turn-on" fluorescent sensor for ozone using bovine serum albumin-directed gold nanoclusters (BSA-Au NCs) via energy transfer was developed. The spectral overlap of fluorescent spectrum of BSA-Au NCs with absorption spectrum of indigo carmine (IDS) was utilized. Ozone cleaves C = C bond of IDS and suppresses energy transfer from BSA-Au NCs to IDS. Therefore, this proposed fluorescent sensor is a "turn-on" detection motif. It is the first application of fluorescent nanoclusters in sensitively detecting ozone from 0...
January 26, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28116193/a-third-surgically-managed-ectopic-pregnancy-after-two-salpingectomies-involving-the-opposite-tube
#8
Naoyuki Iwahashi, Yoko Deguchi, Yuko Horiuchi, Kazuhiko Ino, Kenichi Furukawa
Recurrent ectopic pregnancy in a remnant fallopian tube after ipsilateral salpingectomy is clinically rare. We report the extremely rare case of a third recurrent ectopic pregnancy after two previous salpingectomy procedures involving the opposite tube. A 26-year-old woman, gravida 3 para 0, experienced three ectopic pregnancies brought about by natural conception, all of which were treated surgically (right partial salpingectomy, right remnant tube resection, and left total salpingectomy). During the two salpingectomy procedures involving the right tube, the patency of the intact left tube was intraoperatively confirmed with indigo carmine...
2017: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28113800/computer-aided-classification-of-gastrointestinal-lesions-in-regular-colonoscopy
#9
Pablo Mesejo, Daniel Pizarro, Armand Abergel, Olivier Rouquette, Sylvain Beorchia, Laurent Poincloux, Adrien Bartoli
We have developed a technique to study how good computers can be at diagnosing gastrointestinal lesions from regular (white light and narrow banded) colonoscopic videos compared to two levels of clinical knowledge (expert and beginner). Our technique includes a novel tissue classification approach which may save clinician's time by avoiding chromoendoscopy, a time-consuming staining procedure using indigo carmine. Our technique also discriminates the severity of individual lesions in patients with many polyps, so that the gastroenterologist can directly focus on those requiring polypectomy...
March 29, 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28094368/tris-s-s-dioxide-trithiasumanene-strong-fluorescence-and-cocrystal-with-1-2-6-7-10-11-hexabutoxytriphenylene
#10
Xueqing Hou, Yongtao Zhu, Yunke Qin, Lichuan Chen, Xuexiang Li, Hao-Li Zhang, Wei Xu, Daoben Zhu, Xiangfeng Shao
Thiophene rings in trithiasumanene (1) are oxidized regioselectively to form tris(S,S-dioxide)-trithiasumanene (3). Compound 3 displays strong indigo fluorescence in both solution and the solid state, and forms a 1 : 1 cocrystal with HBT to give a yellow emission in crystalline form.
January 17, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28080899/health-and-nutritional-assessment-of-free-ranging-eastern-indigo-snakes-drymarchon-couperi-in-georgia-united-states
#11
S Emmanuelle Knafo, Terry M Norton, Mark Mitchell, Dirk J Stevenson, Natalie Hyslop, Robert Poppenga, Marcie Oliva, Tai Chen, Carolyn Cray, Samantha E J Gibbs, Lance Durden, Nancy Stedman, Stephen Divers, Ellen Dierenfeld
Clinical pathology and nutritional parameters are useful in evaluating and monitoring threatened and endangered wildlife populations, but reference ranges for most snake species are lacking. From 2001 to 2005, health assessments were performed on 58 eastern indigo snakes (EIS) (Drymarchon couperi) captured in the wild in southeastern Georgia, United States. Health and nutritional assessments performed included hematology, serum biochemistry, fat-soluble vitamins, heavy metals, pesticide contaminants, parasitology, and surveys of other pathogens...
December 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28063079/the-thyroid-the-eyes-and-the-gut-a-possible-connection
#12
REVIEW
D Covelli, M Ludgate
INTRODUCTION: Graves' disease (GD) is an autoimmune disorder responsible for 60-90% of thyrotoxicosis, with an incidence of 1 to 2 cases per 1000 population per year in England. Graves' orbitopathy (GO) is the most frequent extrathyroidal manifestation, not provoked directly by abnormal thyroid hormone levels, but by the consequence of the underlying autoimmune process. The aetiology of autoimmune disorders is due to an interplay between susceptibility genes and environmental factors, such as infections and stress...
January 7, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28005009/computer-aided-classification-of-gastrointestinal-lesions-in-regular-colonoscopy
#13
Pablo Mesejo, Daniel Pizarro, Armand Abergel, Olivier Rouquette, Sylvain Beorchia, Laurent Poincloux, Adrien Bartoli
We have developed a technique to study how good computers can be at diagnosing gastrointestinal lesions from regular (white light and narrow banded) colonoscopic videos compared to two levels of clinical knowledge (expert and beginner). Our technique includes a novel tissue classification approach which may save clinician's time by avoiding chromoendoscopy, a time-consuming staining procedure using indigo carmine. Our technique also discriminates the severity of individual lesions in patients with many polyps, so that the gastroenterologist can directly focus on those requiring polypectomy...
September 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/27995193/chromoendoscopy-in-combination-with-random-biopsies-does-not-improve-detection-of-gastric-cancer-foci-in-cdh1-mutation-positive-patients
#14
Robert Hüneburg, Tim Marwitz, Peer van Heteren, Tobias J Weismüller, Jonel Trebicka, Ronja Adam, Stefan Aretz, Alberto Perez Bouza, Dimitrios Pantelis, Jörg C Kalff, Jacob Nattermann, Cristian P Strassburg
Background and study aims: Hereditary diffuse gastric cancer (HGGC), an autosomal dominant tumor-syndrome, accounts for 1 % to 3 % of gastric cancers worldwide. Presumably 30 % to 40 % of all patients fulfilling the clinical guidelines for HDGC are carriers of a pathogenic mutation in the CDH1 gene. Patients often show multiple foci of signet ring cell carcinoma at early age and are advised to undergo prophylactic total gastrectomy (PTG). Our aim was to improve the endoscopic detection of HDGC by using an enhanced endoscopic protocol...
December 2016: Endoscopy International Open
https://www.readbyqxmd.com/read/27993469/stabilization-and-prolonged-reactivity-of-aqueous-phase-ozone-with-cyclodextrin
#15
Adam Dettmer, Raymond Ball, Thomas B Boving, Naima A Khan, Tanner Schaub, Nilusha Sudasinghe, Carlos A Fernandez, Kenneth C Carroll
Recalcitrant organic groundwater contaminants, such as 1,4-dioxane, may require strong oxidants for complete mineralization. However, their efficacy for in-situ chemical oxidation (ISCO) is limited by oxidant decay and reactivity. Hydroxypropyl-β-cyclodextrin (HPβCD) was examined for its ability to stabilize aqueous-phase ozone (O3) and prolong oxidation potential through inclusion complex formation. Partial transformation of HPβCD by O3 was observed. However, HPβCD proved to be sufficiently recalcitrant, because it was only partially degraded in the presence of O3...
January 2017: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/27988731/the-foremost-ornithological-mystery-of-costa-rica-i-amazilia-alfaroana-i-underwood-1896
#16
Guy M Kirwan, Nigel J Collar
The hummingbird Amazilia alfaroana is known from a single specimen, collected on the Volcán de Miravalles, in north-west Costa Rica, in September 1895. Since the early 20th century, the taxon has been almost always been treated as a subspecies of Indigo-capped Hummingbird A. cyanifrons, which is otherwise endemic to Colombia, although it has also been tentatively suggested that the holotype might represent a hybrid between two unnamed species of trochilids. Our detailed analysis of the specimen reveals species-level differences between A...
November 10, 2016: Zootaxa
https://www.readbyqxmd.com/read/27978441/development-of-horseradish-peroxidase-based-cross-linked-enzyme-aggregates-and-their-environmental-exploitation-for-bioremediation-purposes
#17
Muhammad Bilal, Hafiz M N Iqbal, Hongbo Hu, Wei Wang, Xuehong Zhang
In the present study, horseradish peroxidase (HRP), in-house isolated crude cocktail enzyme, from Armoracia rusticana was cross-linked using a new type of cross-linking agent, i.e., ethylene glycol-bis [succinic acid N-hydroxysuccinimide, (EG-NHS)], which is mild in nature as compared to the glutaraldehyde (GA). The HRP-immobilized cross-linked enzyme aggregates (HRP-CLEAs) were developed using a wider range of EG-NHS and notably no adverse effect was observed. In a comparative evaluation, in the case of EG-NHS, a high-level stability in the residual activity was recorded, whereas a sharp decrease was observed in the case of glutaraldehyde...
March 1, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/27936402/influence-of-triethyl-phosphate-on-phosphatase-activity-in-shooting-range-soil-isolation-of-a-zinc-resistant-bacterium-with-an-acid-phosphatase
#18
Sandra Story, Robin L Brigmon
Phosphatase-mediated hydrolysis of organic phosphate may be a viable means of stabilizing heavy metals via precipitation as a metal phosphate in bioremediation applications. We investigated the effect of triethyl phosphate (TEP) on soil microbial-phosphatase activity in a heavy-metal contaminated soil. Gaseous TEP has been used at subsurface sites for bioremediation of organic contaminants but not applied in heavy-metal contaminated areas. Little is known about how TEP affects microbial activity in soils and it is postulated that TEP can serve as a phosphate source in nutrient-poor groundwater and soil/sediments...
March 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27919254/anti-inflammatory-and-in-vitro-antibacterial-activities-of-traditional-chinese-medicine-formula-qingdaisan
#19
Xinghua Zhao, Xin He, Xiuhui Zhong
BACKGROUND: Qingdaisan (Formulated Indigo powder, QDS) are widely used for treatment of aphtha, sore throat and bleeding gums in China. The aim of the study is to evaluate the anti-inflammatory, antibacterial and dental ulcer therapeutic effects of QDS. METHODS: Dimethylbenzene-induced ear edema test and cotton pellet-induced granuloma test were used to evaluate anti-inflammatory activities of QDS on acute and chronic inflammatory. The healing time and local pathologic changes were used to assess the therapeutic effects of QDS on dental ulcer...
December 5, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27902192/corrigendum-to-fermentibacillus-polygoni-gen-nov-sp-nov-an-alkaliphile-that-reduces-indigo-dye
#20
Kikue Hirota, Kenichi Aino, Isao Yumoto
No abstract text is available yet for this article.
September 2016: International Journal of Systematic and Evolutionary Microbiology
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