keyword
MENU ▼
Read by QxMD icon Read
search

Photo

keyword
https://www.readbyqxmd.com/read/28535488/ftir-analysis-on-aging-characteristics-of-abs-pc-blend-under-uv-irradiation-in-air
#1
Jiarong Li, Fu Chen, Long Yang, Long Jiang, Yi Dan
Fourier Transform Infrared Spectroscopy (FTIR) is adopted to study the aging characteristics of poly(acrylonitrile-butadiene-styrene)/polycarbonate (ABS/PC) blend under UV-irradiation in air by analyzing the variation of the three main absorbance at about 967cm(-1), 1720cm(-1) and 3420cm(-1) associated with carbon-hydrogen bonds belonging to 1,4 butadiene, carbonyl and hydroxyl groups, respectively. Results indicate that, under UV-irradiation in air, the photo-oxidation of the blend is not a simple combination of the photo-oxidation of corresponding ABS and PC themselves and takes place predominantly at the ABS component...
April 29, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28535478/the-effect-of-billboard-design-specifications-on-driving-a-pilot-study
#2
Hadas Marciano, Pe'erly Setter
Decades of research on the effects of advertising billboards on road accident rates, driver performance, and driver visual scanning behavior, has produced no conclusive findings. We suggest that road safety researchers should shift their focus and attempt to identify the billboard characteristics that are most distracting to drivers. This line of research may produce concrete guidelines for permissible billboards that would be likely to reduce the influence of the billboards on road safety. The current study is a first step towards this end...
May 20, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28535035/fabrication-of-anti-biofouling-plasma-filtration-membrane-by-electrospinning-process-using-photo-crosslinkable-zwitterionic-phospholipid-polymers
#3
Jiae Seo, Ji-Hun Seo
The goal of this study is to fabricate a stable plasma filtration membrane with anti-biofouling properties via an electrospinning process. To this end, a random-type copolymer consisting of zwitterionic phosphorylcholine (PC) groups and ultraviolet (UV)-crosslinkable phenyl azide groups was synthesized. The zwitterionic PC group provides anti-biofouling properties, and the phenyl azide group enables the stable maintenance of the fibrous nanostructure of hydrophilic zwitterion polymers in aqueous medium via a simple UV curing process...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28534912/prediction-on-the-light-assisted-exfoliation-of-multilayered-arsenene-by-the-photo-isomerization-of-azobenzene
#4
Jun Zhao, Chunyan Liu, Wanlin Guo, Jing Ma
The exfoliation of gray arsenic into single- or few-layered arsenene is a challenge of utmost importance. We propose here that the conformational change in the photo-isomerization of azobenzene-based photochromes might be used to promote the exfoliation of multilayered arsenene. Our density functional theory calculations show that the trans-to-cis conformational change can lead to an increase of the adjacent interlayer distance of arsenene from 6.59 Å to 11.07 Å. Starting from the transition state, the azobenzene molecule can be isomerized into the more stable trans form based on further ab initio molecular dynamics simulations...
May 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28534896/coupling-between-the-photo-excited-cyclic-%C3%AF-system-and-the-4f-electronic-system-in-a-lanthanide-single-molecule-magnet
#5
K Kizaki, H Ozawa, T Kobayashi, R Matsuoka, Y Sakaguchi, A Fuyuhiro, T Fukuda, N Ishikawa
A new type of electronic interaction which couples two angular momenta, i.e. the angular momentum of a localized 4f system (J) and an orbital angular momentum generated in a cyclic π conjugated system by irradiation with a circularly-polarized light, has been identified in a lanthanide single molecule magnet.
May 23, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28534867/unique-identifiers-for-small-molecules-enable-rigorous-labeling-of-their-atoms
#6
Hesam Dashti, William M Westler, John L Markley, Hamid R Eghbalnia
Rigorous characterization of small organic molecules in terms of their structural and biological properties is vital to biomedical research. The three-dimensional structure of a molecule, its 'photo ID', is inefficient for searching and matching tasks. Instead, identifiers play a key role in accessing compound data. Unique and reproducible molecule and atom identifiers are required to ensure the correct cross-referencing of properties associated with compounds archived in databases. The best approach to this requirement is the International Chemical Identifier (InChI)...
May 23, 2017: Scientific Data
https://www.readbyqxmd.com/read/28534823/preparation-and-in-vitro-photodynamic-activity-of-glucosylated-zinc-ii-phthalocyanines-as-underlying-targeting-photosensitizers
#7
Jian-Yong Liu, Chen Wang, Chun-Hui Zhu, Zhi-Hong Zhang, Jin-Ping Xue
Two novel glucosylated zinc(ІІ) phthalocyanines 7a-7b, as well as the acetyl-protected counterparts 6a-6b, have been synthesized by the Cu(I)-catalyzed 1,3-dipolar cycloaddition between the propargylated phthalocyanine and azide-substituted glucoses. All of these phthalocyanines were characterized with various spectroscopic methods and studied for their photo-physical, photo-chemical, and photo-biological properties. With glucose as the targeting unit, phthalocyanines 7a-7b exhibit a specific affinity to MCF-7 breast cancer cells over human embryonic lung fibroblast (HELF) cells, showing higher cellular uptake...
May 19, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28534632/base-induced-transformation-of-2-acyl-3-alkyl-2h-azirines-to-oxazoles-involvement-of-deprotonation-initiated-pathway
#8
Yingtang Ning, Yuko Otani, Tomohiko Ohwada
An experimental study of base-induced transformation reaction of 2-acyl-3-alkyl-2H-azirines to oxazoles indicated that a deprotonation-initiated mechanism is involved, in addition to nucleophilic addition to the imine functionality. Calculations suggested the participation of a ketenimine (ethenimine) intermediate generated by azirine ring opening of the carbanion intermediate formed by α-deprotonation of 2H-azirine. The ketenimine intermediate possessing methyl substituents at C(3) appears to be more stable than the tautomeric nitrile ylide which was proposed to be involved in photo-induced and pyrolysis reactions of 2-acyl-3-alkyl-2H-azirines to afford oxazoles...
May 23, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28534615/origins-of-water-molecules-in-the-photosystem-ii-crystal-structure
#9
Naoki Sakashita, Hiroshi C Watanabe, Takuya Ikeda, Keisuke Saito, Hiroshi Ishikita
The cyanobacterial photosystem II (PSII) crystal structure includes more than 1300 water molecules in each monomer unit; however, their precise roles in water oxidation are unclear. To understand the origins of water molecules in the PSII crystal structure, the accessibility of bulk water molecules to channel inner spaces in PSII was investigated using the water-removed PSII structure and molecular dynamics (MD) simulations. The inner space of the channel that proceeds toward the D1-Glu65/D2-Glu312 pair (E65/E312 channel) was entirely filled with water molecules from the bulk region...
May 23, 2017: Biochemistry
https://www.readbyqxmd.com/read/28532341/pterostilbene-protects-against-uvb-induced-photo-damage-through-a-phosphatidylinositol-3-kinase-dependent-nrf2-are-pathway-in-human-keratinocytes
#10
Huaping Li, Na Jiang, Bihua Liang, Qing Liu, Erting Zhang, Liqian Peng, Huiyan Deng, Runxiang Li, Zhenjie Li, Huilan Zhu
OBJECTIVE: Ultraviolet B (UVB) irradiation is the initial etiological factor for various skin disorders, including erythema, sunburn, photoaging, and photocarcinogenesis. Pterostilbene (Pter) displayed remarkable antioxidant, anti-inflammatory, and anticarcinogenic activities. This study aimed to investigate the effective mechanism of Pter against UVB-induced photodamage in immortalized human keratinocytes. METHODS: Human keratinocytes were pretreated with Pter (5 and 10 μM) for 24 h prior to UVB irradiation (300 mJ/cm(2))...
May 22, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28531162/ctab-assisted-fabrication-of-bi%C3%A2-wo%C3%A2-thin-nanoplates-with-high-adsorption-and-enhanced-visible-light-driven-photocatalytic-performance
#11
Yuxue Zhou, Pengfei Lv, Xiangdong Meng, Yanping Tang, Pingping Huang, Xiaobing Chen, Xiaoshuang Shen, Xianghua Zeng
Two-dimensional thin Bi₂WO₆ nanoplates have been fabricated using a cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal method. We investigated the proposed formation mechanism based on the crystalline structures of the thin Bi₂WO₆ nanoplates. The high adsorption ability and excellent visible-light driven photocatalytic activities of the Bi₂WO₆ nanoplates were illustrated, in view of exposed (001) facets of nanoplates possessing faster separation of photo-generated charge carriers and increased catalytically active sites...
May 22, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28531140/a-cuffless-blood-pressure-measurement-based-on-the-impedance-plethysmography-technique
#12
Shing-Hong Liu, Da-Chuan Cheng, Chun-Hung Su
In the last decade, cuffless blood pressure measurement technology has been widely studied because it could be applied to a wearable apparatus. Electrocardiography (ECG), photo-plethysmography (PPG), and phonocardiography are always used to detect the pulse transit time (PTT) because the changed tendencies of the PTT and blood pressure have a negative relationship. In this study, the PPG signal was replaced by the impedance plethysmography (IPG) signal and was used to detect the PTT. The placement and direction of the electrode array for the IPG measurement were discussed...
May 21, 2017: Sensors
https://www.readbyqxmd.com/read/28530809/preparation-of-linear-cryogel-arrays-as-a-microfluidic-platform-for-immunochromatographic-assays
#13
Marc Zinggeler, Patrick L Fosso, Yan Hao, Thomas Brandstetter, Jürgen Rühe
We describe a new microfluidic platform to perform immunochromatographic assays. The platform consists of a linear assembly of small, porous cryogel monoliths functionalized with different biomolecules and anchored in an optically transparent capillary, which serves as the microfluidic carrier. This assembly enables fluid flow by capillary action and simple optical detection. Using an in situ preparation method, individual compartments are generated from small plugs of polymer solutions that are subsequently transformed into individually functionalized cryogel monoliths through a photoinduced cross-linking reaction...
May 23, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28530398/synthesis-properties-and-semiconducting-characteristics-of-bf2-complexes-of-%C3%AE-%C3%AE-bisphenanthrene-fused-azadipyrromethenes
#14
Wanle Sheng, Yu-Qing Zheng, Qinghua Wu, Yayang Wu, Changjiang Yu, Lijuan Jiao, Erhong Hao, Jie-Yu Wang, Jian Pei
Three novel π-extended BF2 complexes of β,β-bisphenanthrene-fused azadipyrromethenes containing nine fused rings have been synthesized on the basis of a tandem Suzuki coupling reaction on readily available 2,6-dibromoazaBODIPYs followed by an intramolecular oxidative aromatic coupling mediated by iron(III) chloride. These resultant BF2 complexes exhibit strong absorption (extinction coefficients up to 2.4 × 10(5) M(-1) cm(-1)) and emission in the near-infrared (NIR) range (790-816 nm) with excellent photo and thermal stabilities...
May 22, 2017: Organic Letters
https://www.readbyqxmd.com/read/28530248/single-molecule-detection-of-dihydroazulene-photo-thermal-reaction-using-break-junction-technique
#15
Cancan Huang, Martyn Jevric, Anders Borges, Stine T Olsen, Joseph M Hamill, Jue-Ting Zheng, Yang Yang, Alexander Rudnev, Masoud Baghernejad, Peter Broekmann, Anne Ugleholdt Petersen, Thomas Wandlowski, Kurt V Mikkelsen, Gemma C Solomon, Mogens Brøndsted Nielsen, Wenjing Hong
Charge transport by tunnelling is one of the most ubiquitous elementary processes in nature. Small structural changes in a molecular junction can lead to significant difference in the single-molecule electronic properties, offering a tremendous opportunity to examine a reaction on the single-molecule scale by monitoring the conductance changes. Here, we explore the potential of the single-molecule break junction technique in the detection of photo-thermal reaction processes of a photochromic dihydroazulene/vinylheptafulvene system...
May 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28530201/ultrafast-growth-of-large-area-monolayer-mos2-film-via-gold-foil-assistant-cvd-for-high-sensitive-photodetector
#16
Changbin Nie, Leyong Yu, Xingzhan Wei, Jun Shun, Wenqiang Lu, Weimin Chen, Shuanglong Feng, Haofei Shi
Two-dimensional molybdenum disulfide (MoS2) is a promising material for ultrasensitive photodetector owing to its tunable band gap and high absorption coefficient. However, controlled synthesis of high quality, large area monolayer molybdenum disulfide (MoS2) is still a challenge in practical application. In this work, we report a gold foil assistant chemical vapor deposition (CVD) method of large size (>400 μm) single crystal MoS2 film on silicon dioxide (SiO2) substrate. The influence of Au foil in enlarging the size of single crystal MoS2 were investigated systemically using thermal simulation in Ansys workbench 16...
May 22, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28529228/-the-absence-doubled-photo-poetic-narratives-of-prophylactic-mastectomy
#17
Stella Bolaki
This essay considers Clare Best's poetic sequence Self-portrait without Breasts (2011) and her collaboration with photographer Laura Stevens, which explore preventive surgery and questions of genetics/hereditary breast cancer. In an era when risk and cosmetic reconstruction guide treatment and the development of new breast cancer subjects, Best reclaims the "flat simple scarred chest with no extras." I situate her poems in the context of statistics and the neoliberal postfeminist subject as well as in a poetic tradition about the post-mastectomy body as landscape...
2017: Literature and Medicine
https://www.readbyqxmd.com/read/28529151/comparison-of-ozone-and-photo-biomodulation-therapies-on-mental-nerve-injury-in-rats
#18
Türker Yücesoy, Nükhet Kütük, Dilek Günay Canpolat, Alper Alkan
PURPOSE: This study compared photo-biomodulation (PBM) and ozone therapy (OT) for mental nerve injury by counting Schwann cells (SCs) and fasciculated nerve branches and measuring fascicular nerve areas. MATERIALS AND METHODS: The effects of OT and PBM on mental nerve injury were evaluated. Mental nerves of 27 rats were partly sutured and allocated into 3 groups. Group 1 received no treatment, group 2 received OT, and group 3 received PBM. The number of fascicules beyond nerve branches and the number of SCs before and after nerve injury were evaluated histologically...
April 26, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28529144/toxicant-induced-behavioural-aberrations-in-larval-zebrafish-are-dependent-on-minor-methodological-alterations
#19
Thomas W K Fraser, Abdolrahman Khezri, Juan G H Jusdado, Anna M Lewandowska-Sabat, Theodore Henry, Erik Ropstad
Alterations in zebrafish motility are used to identify neurotoxic compounds, but few have reported how methodology may affect results. To investigate this, we exposed embryos to bisphenol A (BPA) or tetrabromobisphenol A (TBBPA) before assessing larval motility. Embryos were maintained on a day/night cycle (DN) or in constant darkness, were reared in 96 or 24 well plates (BPA only), and behavioural tests were carried out at 96, 100, or 118 (BPA only) hours post fertilisation (hpf). We found that the prior photo-regime, larval age, and/or arena size influence behavioural outcomes in response to toxicant exposure...
May 18, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28528931/evaluation-of-alternative-monomers-to-hema-for-dental-applications
#20
Sven Tauscher, Jörg Angermann, Yohann Catel, Norbert Moszner
OBJECTIVE: The objective of this work is to find potential alternative monomers to 2-hydroxyethyl methacrylate (HEMA) for dental materials (self-etch adhesives and luting composites). METHODS: Monomers 1-9 were tested as potential HEMA substitutes. Methacrylates 4, 5 and 6 and (N-methyl)acrylamides 7-9 were synthesized and characterized by (1)H NMR spectroscopy. The reactivity of each monomer was studied using photo-DSC. Mixtures of monomers 1-9 with the urethane dimethacrylate UDMA (1/1: wt/wt) were formulated and cured...
May 18, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
keyword
keyword
114468
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"