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Mingda Zheng, Yingying Wang, Chenge Wang, Wei Wei, Shuang Ma, Xiaohan Sun, Jiang He
A simple and selective colorimetric sensor based on citrate capped silver nanoparticles (Cit-AgNPs) is proposed for the detection of Thiophanate-methyl (TM) with high sensitivity and selectivity. The method based on the color change of Cit-AgNPs from yellow to cherry red with the addition of TM to Cit-AgNPs that caused a red-shift on the surface plasmon resonance (SPR) band from 394nm to 525nm due to the hydrogen-bonding and substitution. The density functional theory (DFT) method was also calculated the interactions between the TM and citrate ions...
March 13, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Danielle Menosi Gualandro, Nancy Bellei, Mucio Tavares de Oliveira, Sérgio Montenegro
No abstract text is available yet for this article.
January 2018: Revista da Associação Médica Brasileira
Aurélie Bechoff, Keith Ian Tomlins, Ugo Chijioke, Paul Ilona, Andrew Westby, Erick Boy
Gari, a fermented and dried semolina made from cassava, is one of the most common foods in West Africa. Recently introduced biofortified yellow cassava containing provitamin A carotenoids could help tackle vitamin A deficiency prevalent in those areas. However there are concerns because of the low retention of carotenoids during gari processing compared to other processes (e.g. boiling). The aim of the study was to assess the levels of true retention in trans-β-carotene during gari processing and investigate the causes of low retention...
2018: PloS One
Ursula Castro de Oliveira, Milton Yutaka Nishiyama, Maria Beatriz Viana Dos Santos, Andria de Paula Santos-da-Silva, Hipócrates de Menezes Chalkidis, Andreia Souza-Imberg, Denise Maria Candido, Norma Yamanouye, Valquíria Abrão Coronado Dorce, Inácio de Loiola Meirelles Junqueira-de-Azevedo
BACKGROUND: Except for the northern region, where the Amazonian black scorpion, T. obscurus, represents the predominant and most medically relevant scorpion species, Tityus serrulatus, the Brazilian yellow scorpion, is widely distributed throughout Brazil, causing most envenoming and fatalities due to scorpion sting. In order to evaluate and compare the diversity of venom components of Tityus obscurus and T. serrulatus, we performed a transcriptomic investigation of the telsons (venom glands) corroborated by a shotgun proteomic analysis of the venom from the two species...
2018: PloS One
Peter Kämpfer, Hans-Jürgen Busse, Stefanie P Glaeser
A yellow-pigmented, Gram-stain-negative, rod-shaped, non-spore-forming bacterium (strain KSS165-70T ) was isolated from a coolant lubricant emulsion. The 16S rRNA gene sequence analysis of strain KSS165-70T showed high sequence similarity to the type strains of Novosphingobium subterraneum (98.1 %), Novosphingobium lentum (97.9 %) and Novosphingobium taihuense (97.8 %). Sequence similarities to type strains of all other Novosphingobium species were below 97.5 %. Ubiquinone Q-10 was detected as the major respiratory quinone...
March 21, 2018: International Journal of Systematic and Evolutionary Microbiology
Mei-Jiao Liu, Juan Yuan, Jin Tao, Yi-Quan Zhang, Cai-Ming Liu, Hui-Zhong Kou
Three new dysprosium(III) complexes [Dy2 (HL1 -o)2 (L1 )(NO3 )3 ][Dy(NO3 )5 ]·1.5ACE·0.5Et2 O (1), [Dy(L1 )3 ]·2.5MeOH·MeCN (2), and [Dy(L2 )3 ]·MeOH·MeCN (3) (HL1 = rhodamine B salicylaldehyde hydrazine, HL2 = rhodamine B 3-methylsalicylaldehyde hydrazine) were synthesized and characterized. Purple complex 1 contains two ring-open ligands HL1 -o and shows fluorescence of the rhodamine amide moiety, whereas yellow complexes 2 and 3 are comprised of ring-close ligands (L1/2 )- and display fluorescence of the salicylaldehyde Schiff base part...
March 21, 2018: Inorganic Chemistry
Céline M Gossner, Joana M Haussig, Chiara de Bellegarde de Saint Lary, Kaja Kaasik Aaslav, Patricia Schlagenhauf, Bertrand Sudre
Since December 2016, Brazil has faced a large outbreak of yellow fever with ca 1,500 confirmed human cases. In the first 2 months of 2018, Brazil reported almost as many cases as in 2017 as a whole. In these 2 months, five imported cases were reported among unvaccinated European travellers. Three had travelled to Ilha Grande, a popular destination among European tourists. Physicians and European travellers visiting Brazil should follow yellow fever vaccination recommendations.
March 2018: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
Y F Cagin, Y Seckin, F Firat, E Samdanci
BACKGROUND AND AIM: Herbal treatments are becoming increasingly popular in many countries. Anchusa Boraginaceae (also called Tort plant and beef tongue) is commonly used as a herbal medicine in Elazıg region as diuretic and in the treatment of ulcers, and it is stated that this has no adverse effect. We report a case of acute hepatitis associated with long time use of high doses of Anchusa Boraginaceae. CASE: A 43-year-old male patient is drinking water of Anchusa Boraginaceae that is boiling for 14 days to dissolve the stones in the gallbladder...
October 2017: Acta Gastro-enterologica Belgica
Gouri Chaubal, Prasad Sarkale, Pravin Kore, Pragya Yadav
Background: Kyasanur Forest Disease (KFD), a tick borne flavivirus, which was earlier endemic to Karnataka state, India, has been confirmed and detected from neighboring states of Tamil Nadu, Maharashtra, Goa and Kerala states in India. Increased human and vector surveillance therefore becomes essential for the identification of KFD affected regions and control of further spread of the disease. Currently, available KFD detection assays include realtime RT-PCR and nested RT-PCR assays...
February 2018: Heliyon
Jeonghyun Kim, Hyung-Mi Cho, Guebuem Kim
Fluorescent dissolved organic matter (FDOM) is important for marine organisms and the global carbon cycle contributing to the optical properties of surface seawater and organic carbon budgets. Rivers are known to be the main source of FDOM in coastal oceans and marginal seas. In this study, however, we show that the contribution of FDOM produced from organic sediments of the northwestern Pacific continental shelf is similar to that from the Changjiang River. FDOM showed relatively higher concentrations at stations off the Changjiang River mouth and in the central Yellow Sea...
March 20, 2018: Scientific Reports
Patrick Murtagh, Maxwell Treacy, Kirk Stephenson, Ian Dooley
A 33-year-old man presented with a 10-day history of bilateral blurred vision on a background of a prodromal influenza-like illness. Ocular Coherence Tomography (OCT) and fundal examination coincided with a diagnosis of atypical central serous retinopathy. The patient's symptoms worsened during follow-up, and he was started on steroids. Subsequent fundal examination revealed yellow deposits in a honeycomb pattern and hard exudates in the perimacular region. Serial OCTs revealed progression of bilateral macular intraretinal and subretinal fluid...
March 20, 2018: BMJ Case Reports
Daniele Giuffrida, Mariosimone Zoccali, Adriana Arigò, Francesco Cacciola, Coralia Osorio Roa, Paola Dugo, Luigi Mondello
An on-line method based on the coupling of supercritical fluid extraction and supercritical fluid chromatography with triple quadrupole mass spectrometry detection (SFESFCQqQ/MS) for the native carotenoids characterization and apocarotenoids detection in yellow tamarillo was developed for the first time; this is the first work reporting the application of this methodology for the apocarotenoids analysis in any matrix. An off-line liquid extraction (LE) and analysis by LC-PDA-MS, using both a conventional C30 (3 μm I...
March 17, 2018: Archives of Biochemistry and Biophysics
Marine Cotte, Tiphaine Fabris, Juliette Langlois, Ludovic Bellot-Gurlet, Françoise Ploye, Natalie Coural, Clotilde Boust, Jean-Paul Gandolfo, Thomas Galifot, Jean Susini
Louis Ducos du Huron (1837-1920) dedicated his entire life to the elaboration of physical-chemical processes for color photography. This study aimed at highlighting his unique contribution to three-color printing through 1) an in-depth review of the many protocols he published and 2) the synchrotron-based IR and X-ray microanalysis of fragments sampled in three artworks. Ducos du Hauron's method relied on the preparation and assembly of three monochromes (red, blue, yellow). This study brings to light complex multistep recipes based on photochemistry (carbon print), organic, and inorganic chemistry...
March 20, 2018: Angewandte Chemie
Klaus Lunau, Lina An, Miriam Donda, Michele Hohmann, Leonie Sermon, Vanessa Stegmanns
Flower visiting Eristalis hoverflies feed on nectar and pollen and are known to rely on innate colour preferences. In addition to a preference for visiting yellow flowers, the flies possess an innate proboscis reflex elicited by chemical as well as yellow colour stimuli. In this study we show that the flies' proboscis reflex is only triggered by yellow colour stimuli and not altered by conditioning to other colours. Neither in absolute nor in differential conditioning experiments the flies learned to associate other colours than yellow with reward...
2018: PloS One
Deborah Toppenberg-Pejcic, Jane Noyes, Tomas Allen, Nyka Alexander, Marsha Vanderford, Gaya Gamhewage
A rapid review of gray literature from 2015 to 2016 was conducted to identify the lessons learned for emergency risk communication from recent outbreaks of Ebola, Zika, and yellow fever. Gray literature databases and key websites were searched and requests for documents were posted to expert networks. A total of 83 documents met inclusion criteria, 68 of which are cited in this report. This article focuses on the 3 questions, out of 12 posed by World Health Organization as part of a Guideline development process, dealing most directly with communicating risk during health emergencies: community engagement, trust building, and social media...
March 20, 2018: Health Communication
Massimo Zimbone, Annalinda Contino, Giuseppe Maccarrone, Paolo Musumeci, Maria Josè Josè Lo Faro, Lucia Calcagno
The stability of silver nanoplatelet suspensions prepared with different concentrations of Trisodium Citrate (TSC) was studied by depolarized dynamic light scattering and UV-vis spectrometry. The morphology of the nanoparticles, as well as the color and stability of the sols, are tuned by the concentration of the capping agent. The nanoparticles prepared with high TSC concentration (> 10-4 M) are blue triangular nanoplatelets showing a slight truncation of the tips with aging. When low TSC concentrations are used, the color of the sols changes from blue to yellow with aging time and a strong modification of the morphology occurs: the nanoparticle shape changes from triangular to spherical...
March 20, 2018: Nanotechnology
Brenda K Schroeder, William L Schneider, Douglas G Luster, Aaron Sechler, Timothy D Murray
Aplanobacter agropyri was first described in 1915 by O'Gara and later transferred to the genus Corynebacterium by Burkholder in 1948 but it was not included in the Approved Lists of Bacterial Names in 1980 and, consequently, is not recognized as a validly published species. In the 1980s, bacteria resembling Corynebacterium agropyri were isolated from plant samples stored at the Washington State Mycological Herbarium and from a diseased wheatgrass plant collected in Cardwell, Montana, USA. In the framework of this study, eight additional isolates were recovered from the same herbarium plant samples in 2011...
March 20, 2018: International Journal of Systematic and Evolutionary Microbiology
Tchin Darré, Bayaki Saka, Abas Mouhari-Toure, Mazamaesso Tchaou, Améyo Monique Dorkenoo, Kwamé Doh, Atchi Walla, Koffi Amégbor, Vincent Palokinam Pitché, Gado Napo-Koura
BACKGROUND: Mycetoma is a chronic inflammatory process caused either by fungi (eumycetoma) or bacteria (actinomycetoma). In this retrospective study, we report epidemiologic and histopathological data of mycetoma observed in the Lome Hospital, Togo in a 25-year period (1992-2016). METHODOLOGY: This is a retrospective study, over a period of 25 years, to analyze epidemiological and etiological findings of mycetomas seen in the single laboratory of pathological anatomy of the Lomé, Togo...
March 20, 2018: Mycopathologia
Ji Hye Kang, Cheal Kim
Chemosensor 1 was synthesized by the reaction of octopamine with 2,3-dihydroxybenzaldehyde. Sensor 1 determined iron with an obvious color change from pale yellow to brown in nearly-pure water. The detection limits (0.55 and 0.25 μM) for Fe2+ and Fe3+, respectively, were far lower than the EPA (Environmental Protection Agency) guideline concentration for drinking water (5.37 μM). In addition, 1 could be employed to quantify iron in environmental water samples. Moreover, sensor 1 exhibited different fluorescence emissions in response to zinc (green) and cadmium (blue)...
March 20, 2018: Photochemical & Photobiological Sciences
Jeffrey R Powell
Although numerous viruses are transmitted by mosquitoes, four have caused the most human suffering over the centuries and continuing today. These are the viruses causing yellow fever, dengue, chikungunya, and Zika fevers. Africa is clearly the ancestral home of yellow fever, chikungunya, and Zika viruses and likely the dengue virus. Several species of mosquitoes, primarily in the genus Aedes , have been transmitting these viruses and their direct ancestors among African primates for millennia allowing for coadaptation among viruses, mosquitoes, and primates...
March 19, 2018: American Journal of Tropical Medicine and Hygiene
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