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https://www.readbyqxmd.com/read/29243821/improved-recovery-of-ancient-dna-from-subfossil-wood-application-to-the-world-s-oldest-late-glacial-pine-forest
#1
Bertalan Lendvay, Martin Hartmann, Sabine Brodbeck, Daniel Nievergelt, Frederick Reinig, Stefan Zoller, Laura Parducci, Felix Gugerli, Ulf Büntgen, Christoph Sperisen
Ancient DNA from historical and subfossil wood has a great potential to provide new insights into the history of tree populations. However, its extraction and analysis have not become routine, mainly because contamination of the wood with modern plant material can complicate the verification of genetic information. Here, we used sapwood tissue from 22 subfossil pines that were growing c. 13 000 yr bp in Zurich, Switzerland. We developed and evaluated protocols to eliminate surface contamination, and we tested ancient DNA authenticity based on plastid DNA metabarcoding and the assessment of post-mortem DNA damage...
December 15, 2017: New Phytologist
https://www.readbyqxmd.com/read/29243424/-tissue-culture-of-callus-and-establishment-of-regeneration-system-of-tussilago-farfara-petiole
#2
Ji-Wen Ren, Ying Lei, Xiao-Ling Li
Young petiole of Tussilago farfara was used as the material to investigate the plant growth regulators which could influence in vitro culture and plant regeneration and to establish rapid propagation technique. The ideal sterilization method was that young petiole of T. farfara was sterilized with 75% ethanol for 30 s, and then transferred to saturated bleaching power supernatant for 15 min. The suitable medium for callus induction was MS+6-BA 3.0 mg•L⁻¹+2,4-D 2.0 mg•L⁻¹ with 96.2% induction rate...
October 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29243397/effect-of-strong-tooth-bleaching-with-38-hydrogen-peroxide-on-marginal-seal-of-dental-restorations-using-self-etch-and-total-etch-adhesives
#3
Morakot Piemjai, Spun Lenglerdphol
The purpose of this study was to evaluate the distance and/or thickness of dye penetration at enamel and cementum/dentin margins of restorations before and after vital bleaching. Class V cavities were prepared on extracted human premolars and restored with light-cured resin composite using either AQ-Bond or Single-Bond2 adhesives. Four conditions: no bleaching (control), restored before bleaching (RB), bleached and immediately restored (BIR), bleached and stored in artificial saliva for 7 days then restored (B7R), were used for each adhesive group...
December 15, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29240177/photo-bleaching-mechanism-of-the-bac-si-in-bismuth-erbium-co-doped-optical-fibers
#4
Mingjie Ding, Jie Fang, Yanhua Luo, Wenyu Wang, Gang-Ding Peng
Photo-bleaching of the silica-related bismuth active center (BAC-Si) in bismuth/erbium co-doped optical fibers is investigated. By analyzing dynamic spectral characteristics of BAC-Si, the photo-bleaching of the BAC-Si is found to be linked to the escape of an excited electron from the bismuth site in the BAC-Si. This mechanism of BAC-Si bleaching linked to an escaping excited electron is further confirmed with both photo-bleaching experiments by different laser pump wavelengths and a potential energy model describing the loss of an excited electron...
December 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/29239676/bleaching-of-sugar-cane-juice-using-a-food-grade-adsorber-resin-and-explained-by-a-kinetic-model-describing-the-variation-in-time-of-the-content-of-adsorbate
#5
J P Cruz-Tirado, Arnold Cabanillas, Raúl Siche, J Espina, Leonardo Díaz-Sánchez, Albert Ibarz
This work studies the adsorption of colored compounds in cane juice using a food-grade macroporous adsorber resin without functional groups. The adsorption equilibrium was studied through the adsorption isotherms at 30, 40, and 50 ℃. The absorbance at 420 nm was used to measure the concentration of colored compounds, which enables correlation of the residual concentration with the adsorbed concentration. Furthermore, the efficiency of the adsorption process was studied, from which it was observed that there was an improvement in efficiency with increasing resin content, while the increase in temperature was less important in the process...
January 1, 2017: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
https://www.readbyqxmd.com/read/29237131/adverse-effects-of-silver-diamine-fluoride-treatment-among-preschool-children
#6
D Duangthip, M H T Fung, M C M Wong, C H Chu, E C M Lo
This randomized clinical trial aimed to compare the adverse effects and parental satisfaction following the different regimes of silver diamine fluoride (SDF) treatment among preschool children. A total of 888 preschool children who had active dentin caries received different SDF application regimes: group 1, 12% SDF applied annually; group 2, 12% SDF applied semiannually; group 3, 38% SDF applied annually; and group 4, 38% SDF applied semiannually. Information on adverse effects-including tooth or gum pain, gum swelling, gum bleaching, and systemic toxicity-was collected through a parent-reported questionnaire within 1 wk after every SDF or placebo application...
December 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29234024/patterns-of-biophonic-periodicity-on-coral-reefs-in-the-great-barrier-reef
#7
Jamie N McWilliam, Robert D McCauley, Christine Erbe, Miles J G Parsons
The coral reefs surrounding Lizard Island in the Great Barrier Reef have a diverse soundscape that contains an array of bioacoustic phenomena, notably choruses produced by fishes. Six fish choruses identified around Lizard Island exhibited distinctive spatial and temporal patterns from 2014 to 2016. Several choruses displayed site fidelity, indicating that particular sites may represent important habitat for fish species, such as fish spawning aggregations sites. The choruses displayed a broad range of periodicities, from diel to annual, which provides new insights into the ecology of vocalising reef fish species and the surrounding ecosystem...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29230545/influence-of-different-types-of-light-on-the-response-of-the-pulp-tissue-in-dental-bleaching-a-systematic-review
#8
Francine Benetti, Cleidiel Aparecido Araújo Lemos, Marjorie de Oliveira Gallinari, Amanda Miyuki Terayama, André Luiz Fraga Briso, Rogério de Castilho Jacinto, Gustavo Sivieri-Araújo, Luciano Tavares Angelo Cintra
OBJECTIVES: This systematic review (PROSPERO register: CRD42016053140) investigated the influence of different types of light on the pulp tissue during dental bleaching. MATERIALS AND METHODS: Two independent authors conducted a systematic search and risk of bias evaluations. An electronic search was undertaken (PubMed/Medline, Embase, The Cochrane Library, and other databases) until May 2017. The population, intervention, comparison, outcomes (PICO) question was: "Does the light in dental bleaching change the response of the pulp to the bleaching procedure?" The intervention involved pulp tissue/cells after bleaching with light, while the comparison involved pulp tissue/cells after bleaching without light...
December 11, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29226295/-bleaching-glycerol-in-a-microfluidic-fuel-cell-to-produce-high-power-density-at-minimal-cost
#9
Cauê A Martins, Omar A Ibrahim, Pei Pei, Erik Kjeang
Glycerol/bleach flow-through microfluidic fuel cells are presented. Carbon paper-modified Pt/C nanoparticles were used as the anode and cathode. Glycerol oxidation in alkaline medium was tested against hypochlorite reduction in alkaline and acidic media. The mixed media system displayed a power density of 315 mW cm-2 and an open circuit voltage of 1.9-2.0 V.
December 11, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29226023/evaluating-the-whitening-and-microstructural-effects-of-a-novel-whitening-strip-on-porcelain-and-composite-dental-materials
#10
Thair Takesh, Anik Sargsyan, Matthew Lee, Afarin Anbarani, Jessica Ho, Petra Wilder-Smith
Aims: The aim of this project was to evaluate the effects of 2 different whitening strips on color, microstructure and roughness of tea stained porcelain and composite surfaces. Methods: 54 porcelain and 72 composite chips served as samples for timed application of over-the-counter (OTC) test or control dental whitening strips. Chips were divided randomly into three groups of 18 porcelain and 24 composite chips each. Of these groups, 1 porcelain and 1 composite set served as controls...
August 2017: Dentistry: Current Research
https://www.readbyqxmd.com/read/29225957/limited-sterile-processing-capabilities-for-safe-surgery-in-low-income-and-middle-income-countries-experience-in-the-republic-of-congo-madagascar-and-benin
#11
REVIEW
Olive Fast, Christina Fast, Dan Fast, Suzanne Veltjens, Zouliha Salami, Michelle C White
It is highly difficult to perform safe surgery without sterile instruments, yet the capacity to adequately clean, disinfect and sterilise surgical instruments in low-income and middle-income countries is largely unknown. Sterile Processing Education Charitable Trust developed an assessment tool and, in partnership with Mercy Ships, evaluated the sterile processing capacity in 59 facilities in Madagascar, Benin and the Republic of Congo. This data-driven analysis paper illustrates how lack of sterile processing capacity acts as a barrier to safe surgical care...
2017: BMJ Global Health
https://www.readbyqxmd.com/read/29221653/-challenges-posed-by-cosmetic-skin-bleaching
#12
EDITORIAL
A Mahé
No abstract text is available yet for this article.
December 5, 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/29221478/evaluation-of-antioxidant-anti-inflammatory-analgesic-and-antipyretic-activities-of-the-stem-bark-of-sapindus-mukorossi
#13
Madeha Shah, Zahida Parveen, Muhammad Rashid Khan
BACKGROUND: Saponins are the main constituents of genus Sapindus and have the therapeutic potential for inflammatory disorders. In this study the antioxidant, anti-inflammatory, analgesic and antipyretic potential of the stem bark of soap nut (Sapindus mukorossi) methanol extract and its derived fractions has been investigated. METHODS: Powder of stem bark of the S. mukorossi was extracted with methanol (SMM) and fractionated in order of n-hexane (SMH), chloroform (SMC), ethyl acetate (SME), n-butanol (SMB) and the remaining as aqueous fraction (SMA)...
December 8, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29217950/agreement-between-direct-fluorescent-microscopy-and-ziehl-neelsen-concentration-techniques-in-detection-of-pulmonary-tuberculosis-in-northwest-ethiopia
#14
Meseret Workineh, Mandie Maru, Ibrahim Seman, Ziyadu Bezu, Markos Negash, Mulugeta Melku, Addisu Gize, Agumas Shibabaw
Background: The sensitivity of smear microscopy for diagnosis of tuberculosis might be improved through treatment of sputum with sodium hypochlorite and application of fluorescent microscopy. This study aimed to determine the agreement between direct Fluorescent Microscopy and Ziehl-Neelsen concentration technique by their ability of detecting acid fast bacilli in resource poor settings. Methods: A cross sectional study was conducted at Gondar University Referral Hospital, Northwest Ethiopia...
September 2017: Ethiopian Journal of Health Sciences
https://www.readbyqxmd.com/read/29217594/glucose-induced-trophic-shift-in-an-endosymbiont-dinoflagellate-with-physiological-and-molecular-consequences
#15
Tingting Xiang, Robert E Jinkerson, Sophie Clowez, Cawa Tran, Cory J Krediet, Masayuki Onishi, Phillip A Cleves, John R Pringle, Arthur R Grossman
Interactions between the dinoflagellate endosymbiont Symbiodinium and its cnidarian hosts (e.g., corals, sea anemones) are the foundation of coral-reef ecosystems. Carbon flow between the partners is a hallmark of this mutualism, but the mechanisms governing this flow and its impact on symbiosis remain poorly understood. We showed previously that although Symbiodinium strain SSB01 can grow photoautotrophically, it can grow mixotrophically or heterotrophically when supplied with glucose, a metabolite normally transferred from the alga to its host...
December 7, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29216958/investigation-of-extracts-from-tunisian-ethnomedicinal-plants-as-antioxidants-cytotoxins-and-antimicrobials
#16
Fatma Guesmi, Ahmed Sami Ben Hadj, Ahmed Landoulsi
OBJECTIVE: To determine the medicinal potential of various plants and their parts extracted with different solvents. METHODS: The total phenolic content of acetonitrile/water (60%-40%) (ACN/W) and aqueous (W) extract fractions was determined by high-performance liquid chromatography (HPLC), and terpenic compounds were detected by gas chromatography/mass spectrometry (GC/MS). Antioxidant activity of the samples was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay and β-carotene bleaching method...
November 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/29216891/a-multi-trait-systems-approach-reveals-a-response-cascade-to-bleaching-in-corals
#17
Stephanie G Gardner, Jean-Baptiste Raina, Matthew R Nitschke, Daniel A Nielsen, Michael Stat, Cherie A Motti, Peter J Ralph, Katherina Petrou
BACKGROUND: Climate change causes the breakdown of the symbiotic relationships between reef-building corals and their photosynthetic symbionts (genus Symbiodinium), with thermal anomalies in 2015-2016 triggering the most widespread mass coral bleaching on record and unprecedented mortality on the Great Barrier Reef. Targeted studies using specific coral stress indicators have highlighted the complexity of the physiological processes occurring during thermal stress, but have been unable to provide a clear mechanistic understanding of coral bleaching...
December 7, 2017: BMC Biology
https://www.readbyqxmd.com/read/29216194/partitioning-no-take-marine-reserve-ntmr-and-benthic-habitat-effects-on-density-of-small-and-large-bodied-tropical-wrasses
#18
Garry R Russ, Jake R Lowe, Justin R Rizzari, Brock J Bergseth, Angel C Alcala
No-take marine reserves (NTMRs) are increasingly implemented for fisheries management and biodiversity conservation. Yet, assessing NTMR effectiveness depends on partitioning the effects of NTMR protection and benthic habitat on protected species. Such partitioning is often difficult, since most studies lack well-designed sampling programs (i.e. Before-After-Control-Impact-Pair designs) spanning long-term time scales. Spanning 31 years, this study quantifies the effects of NTMR protection and changes to benthic habitat on the density of tropical wrasses (F...
2017: PloS One
https://www.readbyqxmd.com/read/29215772/impact-of-storage-conditions-on-fungal-community-composition-of-green-coffee-beans-coffea-arabica-l-stored-in-jute-sacks-during-one-year
#19
L M Broissin-Vargas, R Snell-Castro, J J Godon, O González-Ríos, M L Suárez-Quiroz
AIMS: The purpose of this study was to evaluate the effect of warehouse storage conditions on the composition of the fungal community of green coffee beans (GCB) that were stored in jute sacks for one year. METHODS AND RESULTS: Molecular characterization of the fungal community composition and population dynamics obtained by Q-PCR, CE-SSCP (Simpson's diversity index D), and Illumina MiSeq sequencing indicated that Saccharomycetales dominated during the first 6 months of storage period with species as Meyerozyma guilliermondii and Pichia kluyveri...
December 7, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29215690/impact-of-material-shade-and-distance-from-light-curing-unit-tip-on-the-depth-of-polymerization-of-composites
#20
André L Faria-E-Silva, Christopher Fanger, Lillian Nguyen, Demetri Howerton, Carmem S Pfeifer
This study aimed to evaluate the effect of the composite shade and distance from the light-curing unit (LCU) tip on the irradiance reaching the bottom of composite disks and on the depth of polymerization. Composites of three shades (opaque - OXDC, bleach - BXL, and A2) were inserted into molds with 3-mm of thickness positioned over a spectrometer and photo-activated with the LCU (Bluephase) tip placed at 0 or 1 cm from the composite surface. The mean irradiance reaching the bottom of composite was recorded during the entire photo-activation (30 s)...
September 2017: Brazilian Dental Journal
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