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Wenhong Li, Daochao Jin, Caihua Shi, Fengliang Li
Gut bacteria play a significant role in host insect. This study evaluated detail difference of midgut bacteria in deltamethrin-resistant, deltamethrin-susceptible and field-caught populations of diamondback moth, and studied phenomics of the predominant midgut bacterium Enterococcus mundtii. Cultivable bacteria revealed that E. mundtii and Carnobacterium maltaromaticum dominated the bacterial populations from deltamethrin-resistant and deltamethrin-susceptible larval midguts, whereas E. mundtii was predominant in field-caught population...
May 16, 2017: Scientific Reports
Andrey A Knyazev, Maksim E Karyakin, Aleksandr S Krupin, Ksenia A Romanova, Yuriy G Galyametdinov
Europium(III) complexes that are the anisometric analogues of a well-known Eu(DBM)3Phen (DBM = dibenzoylmethane; Phen = 1,10-phenanthroline) complex were synthesized. Quantum-chemical calculations of the excited states of new Eu(III) complexes and some conjugated polymers showed that poly(N-vinylcarbazole) provides the most efficient energy transfer in polymer films doped with synthesized Eu(III) complexes. These new composite films were prepared, and their luminescence properties were studied. The results of experimental data confirmed theoretical prediction about significant influence introduced in molecular structure long terminal alkyl chains and cyclohexane on the luminescence efficiency of "Ln(III)-polymer" composite...
May 8, 2017: Inorganic Chemistry
Yang Shen, Shaoqi Feng, Xiaojun Xie, Jizhao Zang, Siwei Li, Tiehui Su, Kuanping Shang, Weicheng Lai, Guangyao Liu, S J Ben Yoo, Joe C Campbell
We demonstrate hybrid integration of modified uni-traveling carrier photodiodes on a multi-layer silicon nitride platform using total reflection mirrors etched by focused ion beam. The hybrid photodetectors show external responsivity of 0.15 A/W and bandwidth of 3.5 GHz for devices with a diameter of 80 µm. The insertion loss of the waveguide is 3 dB and the coupling efficiency of the total reflection mirror is -3 dB. The highest RF output power is -0.5 dBm measured at 3 GHz with 9 mA photocurrent and -9 V bias...
May 1, 2017: Optics Express
Egemen Turhan, Mustafa Kemal Akça, Ahmet Bayar, Murat Songür, Selçuk Keser, Mahmut Nedim Doral
BACKGROUND: Delayed union of fractured bone is one of the main problems of orthopedics and traumatology practice. It was hypothesized that the beneficial effects of allogeneic platelet-rich plasma (PRP) would be valuable in the treatment of segmental bone defects. This study is a comparison of the effects of demineralized bone matrix (DBM) and PRP in a segmental bone defect model. METHODS: Total of 48 Wistar albino rats were separated into 4 groups. Segmental bone defect was created at right radius diaphysis in all specimens using dorsal approach...
March 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
Kazuya Jinnai, Ryota Kabe, Chihaya Adachi
Yb(DBM)3(DPEPO), an emitter, was directly synthesized on a substrate by the vacuum co-deposition of the precursor Yb(DBM)3(H2O)2 and the ligand DPEPO. OLEDs incorporating the co-deposited emitting layer (Yb(DBM)3(H2O)2 : DPEPO molar ratio = 1 : 1) achieved an ηEQE value of 0.15% at 1.0 mA cm(-2).
May 11, 2017: Chemical Communications: Chem Comm
Wei Zhao, Min Shi, Xi-Qian Ye, Fei Li, Xiao-Wei Wang, Xue-Xin Chen
Venoms secreted by the venom gland (VG) of parasitoid wasp help ensure successful parasitism by host immune suppression and developmental regulation. Cotesia vestalis, a larval endoparasitoid, and Diadromus collaris, a pupal endoparasitoid, parasitize the diamondback moth (DBM), Plutella xylostella. To explore and compare the venom components of two endoparasitoids, we sequenced transcriptomes of the VGs and wasp bodies without VGs (BWVGs) of the two endoparasitoids. Statistically enriched GO terms and KEGG pathways of the two VGs compared to respective whole-body background were similar and reflected active protein biosynthesis activities in the two VGs...
May 2, 2017: Scientific Reports
P Purnawirman, Nanxi Li, E Salih Magden, Gurpreet Singh, Michele Moresco, Thomas N Adam, Gerard Leake, Douglas Coolbaugh, Jonathan D B Bradley, Michael R Watts
We demonstrate monolithic integration of a wavelength division multiplexed light source for silicon photonics by a cascade of erbium-doped aluminum oxide (Al<sub>2</sub>O<sub>3</sub>:Er<sup>3+</sup>) distributed feedback (DFB) lasers. Four DFB lasers with uniformly spaced emission wavelengths are cascaded in a series to simultaneously operate with no additional tuning required. A total output power of -10.9  dBm is obtained from the four DFBs with an average side mode suppression ratio of 38...
May 1, 2017: Optics Letters
Denise Steinbach, Gerald Moritz, Ralf Nauen
BACKGROUND: In many cases resistance alleles have been associated with fitness costs and are often dependent on environmental factors such as temperature. Here, we studied the effects of temperature on the overall fitness, including development, survival, and reproduction of three insecticide resistant and one susceptible strain of diamondback moth (DBM), Plutella xylostella (L.). RESULTS: The broader cross-resistance profile of the resistant strains previously selected by diamide and benzoylurea insecticides was tested...
April 26, 2017: Pest Management Science
Noura Alom, Heather Peto, Glen R Kirkham, Kevin M Shakesheff, Lisa J White
Hydrogel scaffolds derived from the extracellular matrix (ECM) of mammalian tissues have been successfully used to promote tissue repair in vitro and in vivo. The objective of this study was to evaluate the osteogenic potential of ECM hydrogels prepared from demineralized and decellularized bovine bone in the presence and absence of osteogenic medium. Culture of C2C12 and mouse primary calvarial cells (mPCs) on decellularized bone ECM (bECM) and demineralized bone matrix (DBM) gels resulted in increased expression of osteogenic gene markers, including a 3...
April 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
Zhen Liang, Bin Li, Mo Huang, Yanqi Zheng, Hui Ye, Ken Xu, Fangming Deng
In this work, a low cost Bluetooth Low Energy (BLE) transceiver for wireless sensor network (WSN) applications, with a receiver (RX)-matching network-reusing power amplifier (PA) load inductor, is presented. In order to decrease the die area, only two inductors were used in this work. Besides the one used in the voltage control oscillator (VCO), the PA load inductor was reused as the RX impedance matching component in the front-end. Proper controls have been applied to achieve high transmitter (TX) input impedance when the transceiver is in the receiving mode, and vice versa...
April 19, 2017: Sensors
Yumin Zhang, Jianru Wang, Yanmiao Ma, Xiaojun Niu, Jianchun Liu, Lan Gao, Xiaoyan Zhai, Kaibo Chu, Bo Han, Liwang Yang, Jue Wang
Demineralized bone matrix (DBM) powder is widely used for bone regeneration due to its osteoinductivity and osteoconductivity. However, difficulties with handling, tendency to migrate from graft sites and lack of stability after surgery sometimes limit the clinical utility of this material. In this work, the possibility of using sodium alginate (ALG) carrier to deliver DBM powder was assessed. DBM-ALG putty with the DBM:ALG weight ratio of 5:5, 6:4, 7:3, 8:2 were prepared, respectively. The properties of the formed composite, including discrete degree, washout property, pH, equilibrium swelling as well as cytotoxicity in vivo, were adopted to ascertain the optimal ratio of DBM and ALG...
June 2017: Cell and Tissue Banking
Mathias Tricot, Paul-André Deleu, Christine Detrembleur, Thibaut Leemrijse
INTRODUCTION: Nonunion is a common complication (15%) of hindfoot and ankle arthrodesis. Autograft can improve the fusion rate because of its osteoconductive, osteoinductive and osteogenic properties. However, autograft harvesting is a source of morbidity. One alternative is to combine allograft with demineralized bone matrix (DBM) and iliac bone marrow aspirate (BMA). This combination graft has similar biological properties to healthy bone. When used alone, allograft has osteoconductive and sometimes structural properties...
April 14, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
Hiroki Kishikawa, Mao Okada, Kazuto Takahashi, Po-Jung Chen, Nobuo Goto, Yi-Lin Yu, Shien-Kuei Liaw
A multi-point fiber sensing system formed from a linear cavity laser is proposed. Various optical sensing systems have been investigated, for example, using fiber Bragg grating (FBG) and Brillouin scattering for multi-point sensing. This paper focuses on a simple sensing system by using multi-wavelength lasing with parallel cavities and a semiconductor optical amplifier (SOA). First, optical nonlinearity in amplification of the SOA is discussed to clarify the effects of gain saturation and four-wave mixing on the proposed multi-channel sensing system...
April 10, 2017: Applied Optics
Beth Bragdon, Stephanie Lam, Sherif Aly, Alexandra Femia, Abigail Clark, Amira Hussein, Elise F Morgan, Louis C Gerstenfeld
Endochondral ossification is the process where cartilage forms prior to ossification and in which new bone forms during both fracture healing and ectopic bone formation. Transitioning to ossification is a highly coordinated process between hypertrophic chondrocytes, vascular endothelial cells, osteoblasts and osteoclasts. A critical biological process that is central to the interactions of these various cell types is angiogenesis. Although it is well established that angiogenesis is crucial for fracture repair, less is known pertaining to the role of angiogenesis in ectopic bone formation...
April 12, 2017: Bone
Katsura Takano, Natsumi Ishida, Kenji Kawabe, Mitsuaki Moriyama, Satoshi Hibino, Tominari Choshi, Osamu Hori, Yoichi Nakamura
Microglial activation has been suggested to play important roles in various neurodegenerative diseases by phagocytosis and producing various factors such as nitric oxide (NO), proinflammatory cytokines. Excessive production of NO, as a consequence of increased inducible nitric oxide synthase (iNOS) in microglia, contributes to the neurodegeneration. During a search for compounds that regulate endoplasmic reticulum (ER) stress, a dibenzoylmethane derivative, 2,2'-dimethoxydibenzoylmethane (DBM 14-26) was identified as a novel neuroprotective agent (Takano et al...
April 5, 2017: Neurochemistry International
Ho-Yin Wong, Wai-Sum Lo, Wesley Ting Kwok Chan, Ga-Lai Law
In this work, we synthesized a series of lanthanide(III) β-diketonate complexes to investigate the induction of triboluminescence. Triboluminescence (TL) spectra, solid-state emission spectra, and luminescence lifetimes of the complexes were obtained to prove consistent emitting species for steady-state and triboluminescence measurements. Detailed analyses of the crystal lattice packing were conducted in an attempt to correlate crystal symmetry, gas discharge, and structural arrangements with "triboexcitation", and it is found that either noncentrosymmetric or centrosymmetic compounds can be TL-active...
April 7, 2017: Inorganic Chemistry
Soodeh Alidadi, Ahmad Oryan, Amin Bigham-Sadegh, Ali Moshiri
This study aimed to compare the effectiveness of xenogeneic demineralized bone matrix (DBM), chitosan (CS), and polymethylmethacrylate (PMMA) on the regeneration of the critical-sized radial bone defects in rats after eight weeks. Fifty bilateral radial bone defects were randomly divided into five groups including untreated defects and those treated with autograft, CS scaffold, PMMA, and DBM. The defects were evaluated by diagnostic imaging, histopathology, histomorphometry, scanning electron microscopy, and biomechanical testing...
June 15, 2017: Carbohydrate Polymers
Tauseef Ahmed, Yannick Le Moullec
Wireless body area networks are increasingly featuring cognitive capabilities. This work deals with the emerging concept of cognitive body area networks. In particular, the paper addresses two important issues, namely spectrum sharing and interferences. We propose methods for channel and power allocation. The former builds upon a reinforcement learning mechanism, whereas the latter is based on convex optimization. Furthermore, we also propose a mathematical channel model for off-body communication links in line with the IEEE 802...
April 6, 2017: Sensors
Jing Zhang, Yanlu Li, Sören Dhoore, Geert Morthier, Gunther Roelkens
A heterogeneously integrated widely tunable III-V-on-silicon ring laser with unidirectional operation is demonstrated. 40 nm tuning range (from 1560 nm to 1600 nm) is obtained using the Vernier effect between two ring resonators incorporated in the ring laser cavity. Unidirectional operation is obtained by integrating a DBR reflector coupling the clockwise and counterclockwise mode of the ring laser cavity. Unidirectional operation is obtained over the entire tuning range with about 10 dB suppression of the clockwise mode...
March 20, 2017: Optics Express
Giuseppe Palma, Mario Christian Falconi, Florent Starecki, Virginie Nazabal, Julien Ari, Loic Bodiou, Joel Charrier, Yannick Dumeige, Emeline Baudet, Francesco Prudenzano
A compact amplifier based on chalcogenide Pr<sup>3+</sup>-doped micro-disk coupled to two ridge waveguides is designed and refined by means of a home-made computer code. The gain G ≈ 7.9 dB is simulated for a Pr<sup>3+</sup> concentration of 10 000 ppm, input signal power of -30 dBm at the wavelength 4.7 µm and input pump power of 50 mW at the wavelength 1.55 µm. In the laser behavior, i.e. without input signal, the maximum slope efficiency S = 8.1 × 10<sup>-4</sup> is obtained for an input pump power of 2 mW...
March 20, 2017: Optics Express
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