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https://www.readbyqxmd.com/read/28549330/impact-of-post-traumatic-stress-disorder-on-oral-health
#1
Ana Cristina de Oliveira Solis, Álvaro Cabral Araújo, Felipe Corchs, Marcio Bernik, Érica Panzani Duran, Cláudio Silva, Francisco Lotufo-Neto
BACKGROUND: The stress experienced as an intense and traumatic event can increase the odds of orofacial pain, affect the biomechanics of masticatory system and compromise the periodontal health. This study was conducted to investigate the impact of post-traumatic stress disorder (PTSD) on oral health. METHODS: A case-control study with a convenience sample was designed. Probing pocket depth (PPD), clinical attachment level (CAL), bleeding on probing, and plaque were recorded at 6 sites per tooth...
May 20, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28549295/structural-characterization-of-astaxanthin-aggregates-as-revealed-by-analysis-and-simulation-of-optical-spectra
#2
Liping Lu, Taoping Hu, Zhigang Xu
Carotenoids can self-assemble in hydrated polar solvents to form J- or H-type aggregates, inducing dramatic changes in photophysical properties. Here, we measured absorption and emission spectra of astaxanthin in ethanol-water solution using ultraviolet-visible and fluorescence spectrometers. Two types of aggregates were distinguished in mixed solution at different water contents by absorption spectra. After addition of water, all probed samples immediately formed H-aggregates with maximum blue shift of 31nm...
May 15, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28549267/the-construction-of-a-novel-nucleic-acids-detection-microplatform-based-on-the-nset-for-one-step-detecting-tk1-dna-and-microrna-21
#3
Jian Zhang, Qian Zhao, Yudong Wu, Bo Zhang, Weipan Peng, Jiafang Piao, Yurui Zhou, Weichen Gao, Xiaoqun Gong, Jin Chang
Microbeads-based microchip technology has become the potential for a new generation of nucleic acids detection in a high-throughput and sensitive manner. However the specificity and operational complexity limit the microchip applied in nucleic acids detection. Herein, in this work, we designed a kind of gold-nanoparticles coated polystyrene microbeads as microplatform conjugating with the molecular beacons as probes. Due to the nanoparticle surface energy transfer of gold-nanoparticles, the fluorescence of dye on one end of molecular beacons was effectively quenched...
May 23, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28549117/engineering-of-recombinant-wisteria-floribunda-agglutinin-specifically-binding-to-galnac%C3%AE-1-4glcnac-lacdinac
#4
Takashi Sato, Hiroaki Tateno, Hiroyuki Kaji, Yasunori Chiba, Tomomi Kubota, Jun Hirabayashi, Hisashi Narimatsu
Wisteria floribunda agglutinin (WFA) is a useful probe for distinguishing glycan structural alterations in diseases such as intrahepatic bile duct carcinoma and hepatic fibrosis; however, the gene encoding WFA has not been identified. Here, we identified the gene encoding WFA, and recombinant WFA was expressed in Escherichia coli and purified. The natural cDNA sequence obtained from wisteria seeds contained an open reading frame of 861 nucleotides encoding a WFA precursor, which included a hydrophobic signal peptide at the N-terminus, a propeptide at the C-terminus and a single cysteine (Cys) residue for dimer formation...
May 26, 2017: Glycobiology
https://www.readbyqxmd.com/read/28548886/association-of-preventive-maintenance-therapy-compliance-and-peri-implant-diseases-a-cross-sectional-study
#5
Alberto Monje, Hom-Lay Wang, José Nart
AIM: This study was aimed at investigating the association between peri-implant maintenance therapy (PIMT) and the frequency of peri-implant diseases, and to further identify the factors that contribute to failure of PIMT compliance. MATERIAL AND METHODS: A cross-sectional study on healthy partial edentulous patients was conducted. These were grouped in the following categories according to the PIMT compliance: regular compliers (RC) (≥2 PIMT/year), erratic compliers (EC) (<2 PIMT/year), and non-compliers (NC) (0 PIMT/year)...
May 26, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28548883/simultaneous-detection-of-oral-pathogens-in-subgingival-plaque-and-prostatic-fluid-of-men-with-periodontal-and-prostatic-diseases
#6
John Estemalik, Catherine Demko, Nabil F Bissada, Nishant Joshi, Donald Bodner, Eswar Shankar, Sanjay Gupta
BACKGROUND: Chronic prostatitis (CP) and benign prostatic hyperplasia (BPH) are complex inflammatory conditions for which the etiological determinants are still poorly defined. Periodontitis is caused by subgingival colonizing bacteria in the oral cavity. The causal effect of periodontal disease on prostatic inflammation has not been established. The purpose of this study is to isolate oral pathogens from expressed prostatic secretions of patients with periodontal disease and chronic prostatitis or benign prostatic hyperplasia...
May 26, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28548860/direct-imaging-of-kinetic-pathways-of-atomic-diffusion-in-monolayer-molybdenum-disulfide
#7
Jinhua Hong, Yuhao Pan, Zhixin Hu, Danhui Lv, Chuanhong Jin, Wei Ji, Jun Yuan, Ze Zhang
Direct observation of atomic migration both on and below surfaces is a long-standing but important challenge in materials science as diffusion is one of the most elementary processes essential to many vital material behaviors. Probing the kinetic pathways, including metastable or even transition states involved down to atomic scale, holds the key to the underlying physical mechanisms. Here, we applied aberration-corrected transmission electron microscopy (TEM) to demon-strate direct atomic-scale imaging and quasi-real-time tracking of diffusion of Mo adatoms and vacancies in monolayer MoS2, an important 2D transition metal dichalcogenide (TMD) system...
May 26, 2017: Nano Letters
https://www.readbyqxmd.com/read/28548853/a-series-of-fluorescent-and-colorimetric-chemodosimeters-for-selective-recognition-of-cyanide-based-on-fret-mechanism
#8
Ying-Xi Hua, Yongliang Shao, Ya-Wen Wang, Yu Peng
A series of fluorescence "turn-on" probes (PY, AN, NA, B1 and B2) have been developed and successfully applied to detect cyanide anions based on Michael-addition reaction and FRET mechanism. These probes demonstrated good selectivity, high sensitivity and very fast recognition for CN-. Especially, the fluorescence response of probe NA finished within 3 seconds. Low LODs (down to 63 nM) are also obtained in these probes with remarkable fluorescence enhancement factors. In addition, fluorescence colors of these probes turned to blue, yellow or orange upon sensing CN-...
May 26, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28548821/turning-nonspecific-interference-into-signal-amplification-covalent-biosensing-nanoassembly-enabled-by-metal-catalyzed-cross-coupling
#9
Hao Li, Fang Wang, Shenguang Ge, Haiyun Liu, Mei Yan, Jinghua Yu
In this work, a new method of protein detection in complicated samples is proposed. This method employs probe-target recognition to induce cross-linking among the probe, the target, and the nonspecific proteins in the complicated sample as a means to convert interference into effective signal amplification. This also eliminates the necessity of multistep signal amplification in a separate solution system. On the basis of this strategy, a simple and robust assay for the activity of serum cathepsin B is established...
May 26, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28548682/arthrotomy-based-pre-clinical-models-of-particle-induced-osteolysis-a-systematic-review
#10
REVIEW
Meghan M Moran, Brittany M Wilson, Ryan D Ross, Amarjit S Virdi, D Rick Sumner
We completed a systematic literature review of in vivo animal models that use arthrotomy-based methods to study particle-induced peri-implant osteolysis. The purpose of the review was to characterize the models developed to date, to determine the questions addressed, to assess scientific rigor and transparency and to identify gaps in knowledge. We probed three literature databases (Medline, Embase and Scopus) and found 77 manuscripts that fit the search parameters. In the most recent 10 years, researchers mainly used rat and mouse models, whereas in the previous 20 years large animal, canine and rabbit models were more common...
May 26, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28548600/a-multi-spectroscopic-and-molecular-docking-approach-to-investigate-the-interaction-of-antiviral-drug-oseltamivir-with-ct-dna
#11
Neda Hosseinpour Moghadam, Sadegh Salehzadeh, Nahid Shahabadi, Reza Golbedaghi
The possible interaction between the antiviral drug oseltamivir and calf thymus DNA at physiological pH was studied by spectrophotometry, competitive spectrofluorimetry, differential pulse voltammogram (DPV), circular dichroism spectroscopy (CD), viscosity measurements, salt effect, and computational studies. Intercalation of oseltamivir between the base pairs of DNA was shown by a sharp increase in specific viscosity of DNA and a decrease of the peak current and a positive shift in differential pulse voltammogram...
May 26, 2017: Nucleosides, Nucleotides & Nucleic Acids
https://www.readbyqxmd.com/read/28548531/hunting-the-gluon-orbital-angular-momentum-at-the-electron-ion-collider
#12
Xiangdong Ji, Feng Yuan, Yong Zhao
Applying the connection between the parton Wigner distribution and orbital angular momentum (OAM), we investigate the probe of the gluon OAM in hard scattering processes at the planned electron-ion collider. We show that the single longitudinal target-spin asymmetry in the hard diffractive dijet production is very sensitive to the gluon OAM distribution. The associated spin asymmetry leads to a characteristic azimuthal angular correlation of sin(ϕ_{q}-ϕ_{Δ}), where ϕ_{Δ} and ϕ_{q} are the azimuthal angles of the proton momentum transfer and the relative transverse momentum between the quark-antiquark pair...
May 12, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28548529/resonances-in-the-field-angle-resolved-thermal-conductivity-of-cecoin_-5
#13
Duk Y Kim, Shi-Zeng Lin, Franziska Weickert, Eric D Bauer, Filip Ronning, J D Thompson, Roman Movshovich
The thermal conductivity measurement in a rotating magnetic field is a powerful probe of the structure of the superconducting energy gap. We present high-precision measurements of the low-temperature thermal conductivity in the unconventional heavy-fermion superconductor CeCoIn_{5}, with the heat current J along the nodal [110] direction of its d_{x^{2}-y^{2}} order parameter and the magnetic field up to 7 T rotating in the ab plane. In contrast to the smooth oscillations found previously for J∥[100], we observe a sharp resonancelike peak in the thermal conductivity when the magnetic field is also in the [110] direction, parallel to the heat current...
May 12, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28548527/liquid-droplets-act-as-compass-needles-for-the-stresses-in-a-deformable-membrane
#14
Rafael D Schulman, René Ledesma-Alonso, Thomas Salez, Elie Raphaël, Kari Dalnoki-Veress
We examine the shape of droplets atop deformable thin elastomeric films prepared with an anisotropic tension. As the droplets generate a deformation in the taut film through capillary forces, they assume a shape that is elongated along the high tension direction. By measuring the contact line profile, the tension in the membrane can be completely determined. Minimal theoretical arguments lead to predictions for the droplet shape and membrane deformation that are in excellent agreement with the data. On the whole, the results demonstrate that droplets can be used as probes to map out the stress field in a membrane...
May 12, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28548521/double-quantum-spin-relaxation-limits-to-coherence-of-near-surface-nitrogen-vacancy-centers
#15
B A Myers, A Ariyaratne, A C Bleszynski Jayich
We probe the relaxation dynamics of the full three-level spin system of near-surface nitrogen-vacancy (NV) centers in diamond to define a T_{1} relaxation time that sets the T_{2}≤2T_{1} coherence limit of the NV's subset qubit superpositions. We find that double-quantum spin relaxation via electric field noise dominates T_{1} of near-surface NVs at low applied magnetic fields. Furthermore, we differentiate 1/f^{α} spectra of electric and magnetic field noise using a novel noise-spectroscopy technique, with broad applications in probing surface-induced decoherence at material interfaces...
May 12, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28548515/velocity-fluctuations-in-sedimenting-brownian-particles
#16
Johannes Möller, Theyencheri Narayanan
We report a gradual transition of dynamics in sedimenting suspensions of charge stabilized Brownian particles prior to the onset of the macroscopic sedimentation front. Using multispeckle ultrasmall-angle x-ray photon correlation spectroscopy (USA-XPCS), we show that well-defined advective motions dominate the colloid dynamics during the early stages of sedimentation. With elapsing time, these advective currents decay and diffusive motions become the dominating contribution in the dynamics. Probing the temporal development of these fluctuations at smaller Peclet numbers (<1) provides a new perspective for the mechanism determining the transient nature of velocity fluctuations in sedimentation and demonstrates new experimental capabilities enabled by multispeckle USA-XPCS...
May 12, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28548480/d-retro-enantiomer-of-quorum-sensing-peptides-modified-polymeric-micelles-for-brain-tumor-targeted-drug-delivery
#17
Danni Ran, Jiani Mao, Changyou Zhan, Cao Xie, Huitong Ruan, Man Ying, Jianfen Zhou, Wan-Liang Lu, Weiyue Lu
In comparison to other tumors, various barriers such as the blood-brain barrier (BBB), enzymatic barriers and the blood-brain tumor barrier (BBTB) severely impede the successful treatment of glioma. Peptide ligands were frequently used as targeting moieties to mediate brain tumor targeted drug delivery. LWSW (SYPGWSW) is a recently reported quorum sensing peptide which is able to efficiently cross the BBB. Even though the linear LWSW traverses the BBB in vitro, its' in vivo targeting ability has been greatly impaired due to proteolysis...
May 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28548462/neurocognitive-mechanisms-of-real-world-autobiographical-memory-retrieval-insights-from-studies-using-wearable-camera-technology
#18
REVIEW
Tiffany E Chow, Jesse Rissman
In recent years, investigation into the cognitive and neural mechanisms of autobiographical memory has been aided by the use of experimental paradigms incorporating wearable camera technology. By effortlessly capturing first-person images of one's life events, these cameras provide a rich set of naturalistic stimuli that can later be used to trigger the recall of specific episodes. Here, we chronicle the development and progression of such studies in behavioral and neuroimaging examinations of both clinical and nonclinical adult populations...
May 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28548460/internally-generated-hippocampal-sequences-as-a-vantage-point-to-probe-future-oriented-cognition
#19
REVIEW
Giovanni Pezzulo, Caleb Kemere, Matthijs A A van der Meer
Information processing in the rodent hippocampus is fundamentally shaped by internally generated sequences (IGSs), expressed during two different network states: theta sequences, which repeat and reset at the ∼8 Hz theta rhythm associated with active behavior, and punctate sharp wave-ripple (SWR) sequences associated with wakeful rest or slow-wave sleep. A potpourri of diverse functional roles has been proposed for these IGSs, resulting in a fragmented conceptual landscape. Here, we advance a unitary view of IGSs, proposing that they reflect an inferential process that samples a policy from the animal's generative model, supported by hippocampus-specific priors...
May 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28548456/proteomics-in-cell-division
#20
REVIEW
Zeynep Cansu Üretmen Kagıalı, Aydanur Şentürk, Nazlı Ezgi Özkan Küçük, Mohammed Haroon Qureshi, Nurhan Özlü
Cell division requires a coordinated action of the cell cycle machinery, cytoskeletal elements, chromosomes and membranes. Cell division studies have greatly benefitted from the mass spectrometry (MS)-based proteomic approaches for probing the biochemistry of highly dynamic complexes and their coordination with each other as a cell progresses into division. In this review, we first summarize a wide-range of proteomic studies that focus on the identification of sub-cellular components/protein complexes of the cell division machinery including kinetochores, mitotic spindle, midzone and centrosomes...
May 26, 2017: Proteomics
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