Search results for "SINGLE"

Electron Irradiation Effects on Single‐Layer MoS 2 Obtained by Gold‐Assisted Exfoliation

2022

International audience; Mechanical exfoliation assisted by gold is applied to obtain good quality large lateral size single-layer MoS2. The effects of 2.5 MeV electron irradiation are investigated at room temperature on structural and electronic features by Raman and microluminescence spectroscopy. The exciton recombination emission in the direct bandgap of single-layer MoS2 is affected during irradiation starting from the minimum explored dose of 1 kGy. At higher doses, Raman bands show no relevant modifications whereas the exciton emission is quenched, suggesting that irradiation-induced point defects affect exciton dynamics.

Bonus

2020

The article is devoted to songs and instrumentals which are referred to as bonus tracks in the area of music albums, extended plays and singles. The fi rst part concerns the lexeme bonus as a language unit of Polish, its description in dictionaries and its role in the texts about musical releases. The next part describes reasons and consequences of adding bonus tracks to albums, EPs and singles. The author proposes the preliminary typology of bonus tracks and shows a way of describing them in musical releases. In the last part the author proves that researchers of popular music can benefi t from the fact that bonus tracks are added to albums.

Samotni ojcowie w percepcji dzieci

2019

Zagadnienie samotnego ojcostwa stanowi jeden z bardziej interesujących, aczkolwiek nadal mało zgłębionych, obszarów badań nad rodziną i rodzicielstwem. Celem tego opracowania jest poznanie sposobu, w jaki dzieci postrzegają swoich samotnie opiekujących się nimi ojców. W tym celu wykorzystano wyniki arbitralnie wybranych badań ilościowych i jakościowych, przeprowadzonych w ostatnich czterech dekadach. Jednym z wniosków, sformułowanych w prezentowanym artykule, jest stanowisko, że aktualny stan badań nad percepcją dzieci w zakresie oceny ich samotnie wychowujących je ojców jest niezadowalający. Istnieje zatem konieczność prowadzenia dalszych badań w tym zakresie.

A comparison between the single ring pressure infiltrometer and simplified falling head techniques

2013

Testing the relative performances of the single ring pressure infiltrometer (PI) and simplified falling head (SFH) techniques to determine the field saturated soil hydraulic conductivity, Kfs, at the near point scale may help to better establish the usability of these techniques for interpreting and simulating hydrological processes. A sampling of 10 Sicilian sites showed that the measured Kfs was generally higher with the SFH technique than the PI one, with statistically significant differences by a factor varying from 3 to 192, depending on the site. A short experiment with the SFH technique yielded higher Kfs values because a longer experiment with the PI probably promoted short-term swe…

Chronic neural probe for simultaneous recording of single-unit, multi-unit, and local field potential activity from multiple brain sites

2017

Drug resistant focal epilepsy can be treated by resecting the epileptic focus requiring a precise focus localisation using stereoelectroencephalography (SEEG) probes. As commercial SEEG probes offer only a limited spatial resolution, probes of higher channel count and design freedom enabling the incorporation of macro and microelectrodes would help increasing spatial resolution and thus open new perspectives for investigating mechanisms underlying focal epilepsy and its treatment. This work describes a new fabrication process for SEEG probes with materials and dimensions similar to clinical probes enabling recording single neuron activity at high spatial resolution.Polyimide is used as a bi…

Autobiographical memory and the self in a single-case of chronic unilateral spatial neglect

2016

International audience; Unilateral spatial neglect (USN) is mainly defined as a condition affecting perception and the mental representation of the environment. However, nothing is known about its impact on the ability to mentally represent one's past and on personal identity. We addressed these questions in a case of chronic USN, DR, a 59-year-old right-handed woman, who underwent a variety of measures exploring the self and autobiographical memory (AM). DR showed preserved self-images and her AM performance was only preserved when memories were prompted by her own self-images and not by self-unrelated cues. Our findings are discussed in light of the interconnection between the self and AM.

Poczucie samotności u kobiet i mężczyzn singli z perspektywy spotkania

2020

Regulatory cytokine gene polymorphisms and risk of colorectal carcinoma.

2006

It is well established that cancer arises in chronically inflamed tissue, and this is particularly notable in the gastrointestinal tract. Classic examples include Helicobacter pylori-associated gastric cancer, hepatocellular carcinoma, and inflammatory bowel disease-associated colorectal cancer. Growing evidence suggests that these associations might be not casual findings. Focusing on individual cytokines has generated evidence that anti-inflammatory cytokine interleukin (IL)-10 and transforming growth factor-beta1 (TGF-beta1) may have a complex role in gastrointestinal carcinogenesis. As an example, IL-10-deficient mice develop severe atrophic gastritis and a chronic enterocolitis, develo…

Structure and optical properties of a monolayer single crystal of a cyanine dye

1992

Abstract Molecularly thin single crystals of a cyanine dye prepared by adsorption at a charged surfactant monolayer are studied by polarized optical spectroscopy and electron diffraction. Both techniques independently show a herringbone arrangement of the dye with the long axes of translationally inequivalent molecules forming an angle of 80°. The dye arranges in a primitive rectangular unit cell (a=21.2 A, b=6.14 A) adjacent to an epitaxially related hexagonal cell of the aliphatic tails of the surfactant.

Induced Night-Vision by Singlet-Oxygen-Mediated Activation of Rhodopsin

2019

In humans, vision is limited to a small fraction of the whole electromagnetic spectrum. One possible strategy for enhancing vision in deep-red or poor-light conditions consists of recruiting chlorophyll derivatives in the rod photoreceptor cells of the eye, as suggested in the case of some deep-sea fish. Here, we employ all-atom molecular simulations and high-level quantum chemistry calculations to rationalize how chlorin e6 (Ce6), widely used in photodynamic therapy although accompanied by enhanced visual sensitivity, mediates vision in the dark, shining light on a fascinating but largely unknown molecular mechanism. First, we identify persistent interaction sites between Ce6 and the extra…