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van Herpt Jochem T JT Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen - - 2014
A new responsive material composed of an amphiphilic light-switchable dithienylethene unit functionalized with a hydrophobic cholesterol unit and a hydrophilic poly(ethylene glycol)-modified pyridinium group has been designed. This unique single-molecule system shows responsive light-switchable self-assembly in both water and organic solvents. Light-triggered reversible vesicle formation in aqueous solutions is reported. ...
Huang Zheng-Yu ZY Department of Materials Science and Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan. - - 2014
By introduction of nano-structured crystallite capping layers, the power conversion efficiency of top-illumination organic solar cells is improved from 4.2 ± 0.1% to 6.0 ± 0.2%, representing a 44% enhancement. This is caused by the increase in JSC and led by the enhancement in the local E distribution inside the ...
Niedzwiedzki Dariusz M - - 2014
BChl f is a photosynthetic pigment predicted nearly 40 years ago as a fourth potential member of the Chlorobium chlorophylls family (BChl c, d and e). However, this pigment still has not been found in a naturally-occurring organism. These pigments are utilized by anoxygenic green photosynthetic bacteria for assembly of ...
Heinke Lars - - 2014
The remote control of surface properties is one of the key challenges in interfacial systems chemistry. Here, we report the realization of a SURMOF (surface-mounted metal organic framework)-based hybrid system in which a crucial component can be switched by light. The realization of this two-component system is made possible by ...
Park S J SJ Department of Physics and Division of Energy Systems Research, Ajou University, Suwon 443-749, - - 2014
Microorganisms such as fungi and bacteria cause many human diseases and therefore rapid and accurate identification of these substances is essential for effective treatment and prevention of further infections. In particular, contemporary microbial detection technique is limited by the low detection speed which usually extends over a couple of days. ...
Ren Tianying T Oregon Hearing Research Center, Department of Otolaryngology, Oregon Health &Science University, Portland, Oregon 97239, - - 2014
The exceptional sensitivity of mammalian hearing organs is attributed to an active process, where force produced by sensory cells boost sound-induced vibrations, making soft sounds audible. This process is thought to be local, with each section of the hearing organ capable of amplifying sound-evoked movement, and nearly instantaneous, since amplification ...
Chuang Ho-Chiao HC National Taipei University of Technology. - - 2014
This study proposes a respiratory compensating system which is mounted on the top of the treatment couch for reverse motion, opposite from the direction of the targets (diaphragm and hemostatic clip), in order to offset organ displacement generated by respiratory motion. Traditionally, in the treatment of cancer patients, doctors must ...
Jo YoungJu Y Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of - - 2014
Two-dimensional angle-resolved light scattering maps of individual rod-shaped bacteria are measured at the single-cell level. Using quantitative phase imaging and Fourier transform light scattering techniques, the light scattering patterns of individual bacteria in four rod-shaped species (Bacillus subtilis, Lactobacillus casei, Synechococcus elongatus, and Escherichia coli) are measured with unprecedented sensitivity ...
Ebenhöh Oliver O Institute for Complex Systems and Mathematical Biology, University of Aberdeen, , Meston Building, Old Aberdeen, Aberdeen AB24 3UE, - - 2014
Photosynthetic eukaryotes house two photosystems with distinct light absorption spectra. Natural fluctuations in light quality and quantity can lead to unbalanced or excess excitation, compromising photosynthetic efficiency and causing photodamage. Consequently, these organisms have acquired several distinct adaptive mechanisms, collectively referred to as non-photochemical quenching (NPQ) of chlorophyll fluorescence, which ...
Englund Elias E Microbial Chemistry, Department of Chemistry, Ångström and Science for Life Laboratory, Uppsala University, Uppsala, - - 2014
In recent years, there has been an increased interest in the research and development of sustainable alternatives to fossil fuels. Using photosynthetic microorganisms to produce such alternatives is advantageous, since they can achieve direct conversion of carbon dioxide from the atmosphere into the desired product, using sunlight as the energy ...
Mann Zoë F ZF Laboratory of Cochlear Development, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, 35A Convent Drive, Bethesda, Maryland 20892-3729, - - 2014
The auditory systems of animals that perceive sounds in air are organized to separate sound stimuli into their component frequencies. Individual tones then stimulate mechanosensory hair cells located at different positions on an elongated frequency (tonotopic) axis. During development, immature hair cells located along the axis must determine their tonotopic ...
Kong Dali D Department of Mathematical Sciences, University of Exeter Exeter, - - 2014
We investigate the swimming motion of rod-shaped magnetotactic bacteria affiliated with the Nitrospirae phylum in a viscous liquid under the influence of an externally imposed, time-dependent magnetic field. By assuming that fluid motion driven by the translation and rotation of a swimming bacterium is of the Stokes type and that ...
Saikin Semion K SK Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, - - 2014
Living organisms have to adjust to their surrounding in order to survive in stressful conditions. We study this mechanism in one of most primitive creatures - photosynthetic green sulfur bacteria. These bacteria absorb photons very efficiently using the chlorosome antenna complexes and perform photosynthesis in extreme low-light environments. How the ...
Castro Jason B JB Psychology and Neuroscience, Bates College Lewiston, ME, - - 2014
In the philosophy of perception, olfaction is the perennial problem child, presenting a range of difficulties to those seeking to define its proper referents, and its phenomenological content. Here, we argue that many of these difficulties can be resolved by recognizing the object-like representation of odors in the brain, and ...
Sanchez-Barcelo Emilio J - - 2013
This article reviews the more recent patents in three kinds of therapeutic strategies using the application of visible light to irradiate photosensible substances (PSs) of different natures. The light-activation of these PSs is directly responsible for the desired therapeutic effects. This group of light therapies includes photodynamic therapy (PDT), photothermal ...
Zhang Yan Y Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, University of Jinan, Jinan 250022, PR China. - - 2013
ZnO nanorods inorganic-organic heterostructured light-emitting diodes have been demonstrated on a cheap/disposable paper substrate and applied in multiplexed photoelectrochemical immunoassay.
Schmid Günter G Siemens AG, Corporate Technology, Guenther-Scharowsky-Strasse 1, 91058, Erlangen, - - 2014
Volatile copper(I) benzoates with variable degrees of fluorination are used for p-doping of organic hole-transport layers in single-carrier devices, charge-generation layers, and in organic light-emitting diodes. The charge-transport abilities of the doped materials correlate with the degree and position of the fluorination on the aromatic ring of the carboxylate groups.
Wolfe Gordon V GV Dept. Biological Sciences, California State Univ. Chico, Chico, CA 95929-0515, USA. Electronic address: - - 2013
We describe the construction of temperature-light gradient incubator with a novel material: a thermally-conductive graphite foam that is lightweight, chemically resistant, economically competitive with metal, and much cheaper to fabricate. We combined this material with a variable-intensity LED light array to construct a low-cost light-temperature gradient incubator, and demonstrate its ...
Nam Hye Jin HJ Department of Chemistry, Institute of Basic Sciences, Sungkyunkwan Advanced Institute of Nano Technology, Sungkyunkwan University, Suwon 440-746, South Korea. - - 2013
A polydopamine (PDA) thin film with a dense and conformal surface was prepared under optimized deposition conditions using O2 gas as an oxygen source. The PDA-based organic phototransistors exhibited high photosensitivity and photo-controlled switching properties under light illumination.
Bienertová-Vašků Julie J Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Brno 625 00, Czech Republic; Department of Paediatric Oncology, University Hospital Brno, Brno 613 00, Czech Republic; Central-European Technological Institute, Brno, Czech Republic; Regional Centre for Applied Molecular Oncology, Brno, Czech Republic. Electronic address: - - 2013
Epigenetic changes are generally based on the switching of alternative functional or structural states and result in the adaptation of cellular expression patterns during proliferation, differentiation or plastic changes in the adult organism, whereas some epigenetic information can be passed on other generations while other is not. Hence, the principal ...
Gouveia Luísa L Laboratório Nacional de Energia e Geologia, I.P. Unidade de Bioenergia, Estrada do Paço do Lumiar, 1649-038 Lisboa, - - 2013
This study demonstrates the simultaneous production of bioelectricity and added-value pigments in a Photosynthetic Alga Microbial Fuel Cell (PAMFC). A PAMFC was operated using Chlorella vulgaris in the cathode compartment and a bacterial consortium in the anode. The system was studied at two different light intensities and the maximum power ...
Lee Jonghee - - 2013
We report on the characteristics of enhanced and balanced white-light emission from bi-directional organic light-emitting diodes (BiOLEDs) enabled by the introduction of micro-cavity effects. The insertion of an additional metal layer between the indium tin oxide anode and the hole transporting layer results in similar light output of our BiOLEDs ...
Mativetsky Jeffrey M - - 2013
Efficient out-of-plane charge transport is required in vertical device architectures, such as organic solar cells and organic light emitting diodes. Here, we show that graphene, transferred onto different technologically-relevant substrates, can be used to induce face-on molecular stacking and improve out-of-plane hole transport in copper phthalocyanine thin films.
Pushkin Dmitri O - - 2013
We consider the tracer diffusion D_{rr} that arises from the run-and-tumble motion of low Reynolds number swimmers, such as bacteria. Assuming a dilute suspension, where the bacteria move in uncorrelated runs of length λ, we obtain an exact expression for D_{rr} for dipolar swimmers in three dimensions, hence explaining the ...
Lang Xianjun - - 2013
The future development of chemistry entails environmentally friendly and energy sustainable alternatives for organic transformations. Visible light photocatalysis can address these challenges, as reflected by recent intensive scientific endeavours to this end. This review covers state-of-the-art accomplishments in visible-light-induced selective organic transformations by heterogeneous photocatalysis. The discussion comprises three sections ...
Hill Eric H - - 2013
Cationic oligo-p-phenylene ethynylenes are highly effective light-activated biocides that deal broad-spectrum damage to a variety of pathogens, including bacteria. A potential problem arising in the long-term usage of these compounds is photochemical breakdown, which nullifies their biocidal activity. Recent work has shown that these molecules complex with oppositely-charged surfactants, and ...
Peyer Suzanne M - - 2013
The squid Euprymna scolopes has evolved independent sets of tissues capable of light detection, including a complex eye and a photophore or 'light organ', which houses the luminous bacterial symbiont Vibrio fischeri. As the eye and light organ originate from different embryonic tissues, we examined whether the eye-specification genes, pax6, ...
Nishide Shin-Ya - - 2013
To explore developmental changes in circadian organization of central and peripheral oscillators, circadian rhythms in clock gene expression were examined in 12 organs in transgenic rats carrying a bioluminescence reporter for Per2. Organ slices were obtained from different developmental stages starting at postnatal day 5 and tissue was cultured for ...
Claassens Nico J - - 2013
A wide range of proton-pumping rhodopsins (PPRs) have been discovered in recent years. Using a synthetic biology approach, PPR photosystems with different features can be easily introduced in nonphotosynthetic microbial hosts. PPRs can provide hosts with the ability to harvest light and drive the sustainable production of biochemicals or biofuels. ...
Muller A A Service de Radiologie, Hospices Civils de Lyon, Centre Hospitalier Lyon Sud, 165 Chemin du Grand Revoyet, 69495, Pierre Bénite, France, - - 2013
Extracorporeal high-intensity focused ultrasound (HIFU) is a minimally invasive therapy considered with increased interest for the ablation of small tumors in deeply located organs while sparing surrounding critical tissues. A multitude of preclinical and clinical studies have showed the feasibility of the method; however, concurrently they showed several obstacles, among ...
Park Jae Hyo - - 2013
In this work, non-volatile memory thin-film transistor (NVM-TFT) was fabricated by nickel silicide-induced laterally crystallized (SILC) polycrystalline silicon (poly-Si) as the active layer. The nickel seed silicide-induced crystallized (SIC) poly-Si was used as storage layer which is embedded in the gate insulator. The novel unit pixel of active matrix organic ...
Nasu Keiro - - 2013
Efficient thermally activated delayed fluorescence was observed from a spiro-anthracenone derivative (ACRSA). An organic light-emitting diode containing ACRSA exhibited blue-greenish electroluminescence with a maximum external quantum efficiency of 16.5%.
Reshak A H - - 2013
The potential of organic semiconductor based devices for light generation is demonstrated by the commercialisation of display technologies using organic light emitting diode (OLED). In OLED, organic materials plays an important role of emitting light once the current is passed through. However OLED have drawbacks whereby it suffers from photon ...
Vatansever Fatma - - 2013
Biological warfare and bioterrorism is an unpleasant fact of 21st century life. Highly infectious and profoundly virulent diseases may be caused in combat personnel or in civilian populations by the appropriate dissemination of viruses, bacteria, spores, fungi or toxins. Dissemination may be airborne, waterborne, or by contamination of food or ...
Yuan Yongbo - - 2013
High sensitivity photodetectors in ultraviolet (UV) and infrared (IR) range have broad civilian and military applications. Here we report on an un-cooled solution-processed UV-IR photon counter based on modified organic field-effect transistors. This type of UV detectors have light absorbing zinc oxide nanoparticles (NPs) sandwiched between two gate dielectric layers ...
Wang Hanyu - - 2013
Here we demonstrate the feasibility of continuous, self-sustained hydrogen gas production based solely on solar light and biomass (wastewater) recycling, by coupling solar water splitting and microbial electrohydrogenesis in a photoelectrochemical cell-microbial fuel cell (PEC-MFC) hybrid device. The PEC device is composed of a TiO2 nanowire-arrayed photoanode and a Pt ...
Christie Kevin W KW Biology Department, University of Iowa, Iowa City, IA - - 2013
Noise-induced hearing loss (NIHL) is a growing health issue, with costly treatment and lost quality of life. Here we establish Drosophila melanogaster as an inexpensive, flexible, and powerful genetic model system for NIHL. We exposed flies to acoustic trauma and quantified physiological and anatomical effects. Trauma significantly reduced sound-evoked potential ...
Pfanner Florian - - 2013
Purpose: To avoid motion artifacts in medical imaging or to minimize the exposure of healthy tissues in radiation therapy, medical devices are often synchronized with the patient's respiratory motion. Today's respiratory motion monitors require additional effort to prepare the patients, e.g., mounting a motion belt or placing an optical reflector ...
Marcano Aristides - - 2013
We measured the photothermal lens signal in samples exhibiting high turbidity using a pump-probe scheme. We show that the photothermal lens signal properties remain nearly unchanged up to values of turbidity of 6 cm(-1) despite the signal reduction due to the decrease of excitation power associated to turbidity losses. The ...
Chen Yingzhi - - 2013
Novel organic nanoplate-nanowire heterojunctions were facilely fabricated and they demonstrated high visible-light photocatalytic activity.
Ren Shiting - - 2013
Capacitor is a storage device to harvest charge produced from microbial fuel cells (MFCs). In intermittent charging mode, the capacitor is charged by an MFC first, and then discharged through an external resistance. The charge harvested by capacitor is affected by the charging and discharging frequency. In the present study, ...
Fasano Vito - - 2013
Light-emitting electrospun nanofibers of poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-( N,N '-diphenyl)- N,N '-di(p-butyl-oxy-phenyl)-1,4-diaminobenzene)] (PFO-PBAB) are produced by electrospinning under different experimental conditions. In particular, uniform fibers with average diameter of 180 nm are obtained by adding an organic salt to the electrospinning solution. The spectroscopic investigation assesses that the presence of the organic salt ...
Li Ning - - 2013
Organic light-emitting diodes are emerging as leading technologies for both high quality display and lighting. However, the transparent conductive electrode used in the current organic light-emitting diode technologies increases the overall cost and has limited bendability for future flexible applications. Here we use single-layer graphene as an alternative flexible transparent ...
Wang Qi - - 2013
We study the stability of common hole transport material (HTM)/electron transport material (ETM) interfaces present in typical organic light-emitting devices (OLEDs) under various stress scenarios. We found out that these interfaces degrade rapidly due to an interaction between HTM positive polarons and HTM singlet excitons. The phenomenon results in a ...
Zheng Bingwei - - 2013
Antireflective surfaces are often realized by minimizing the refractive index contrast between the air and substrate using subwavelength microstructures. In this paper, we introduce another kind of geometry-induced antireflective surface using multireflection to suppress reflection to a very low extent. This surface is composed of micro-∧-shape array with the wedge ...
Davidson Eric A - - 2013
Cells transmit and receive information via signalling pathways. A number of studies have revealed that information is encoded in the temporal dynamics of these pathways, and has highlighted how pathway architecture can influence the propagation of signals in time and space. The functional properties of pathway architecture can also be ...
Tumbleston John R - - 2013
Nanoimprinting the photoactive layer of bulk heterojunction (BHJ) organic solar cells is a promising technique for enhancing device performance via improved light absorption. Here, we demonstrate that imprinting poly(3-hexylthiophene) (P3HT) and fullerene BHJ blends leads to adverse morphological changes within the photoactive nanopattern which have been previously overlooked. In particular, ...
Okamoto Sho S Microbial Genetics Laboratory, Genetic Strains Research Center, National Institute of Genetics, Mishima, Shizuoka, - - 2013
Many fungi respond to light and regulate fungal development and behavior. A blue light-activated complex has been identified in Neurospora crassa as the product of the wc-1 and wc-2 genes. Orthologs of WC-1 and WC-2 have hitherto been found only in filamentous fungi and not in yeast, with the exception ...
Spudich John L - - 2013
A fundamental design principle of microbial rhodopsins is that they share the same basic light-induced conversion between two conformers. Alternate access of the Schiff base to the outside and to the cytoplasm in the outwardly open "E" conformer and cytoplasmically open "C" conformer, respectively, combined with appropriate timing of pKa ...
Liaptsis Georgios - - 2013
Stacks of potential: A cross-linkable host-guest system for state-of-the-art multi-layer device stacks is developed. The spirobifluorene-based host materials were co-cross-linked with green emitting phosphorescent (fac)-Ir(III) complexes. As a result a five-layered organic light-emitting diode (OLED) could be fabricated in which each organic layer has been deposited from solution.
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