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https://www.readbyqxmd.com/read/28444827/fitness-costs-and-life-table-parameters-of-highly-insecticide-resistant-strains-of-plutella-xylostella-l-lepidoptera-plutellidae-at-different-temperatures
#1
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
https://www.readbyqxmd.com/read/28429412/bone-extracellular-matrix-hydrogel-enhances-osteogenic-differentiation-of-c2c12-myoblasts-and-mouse-primary-calvarial-cells
#2
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
https://www.readbyqxmd.com/read/28422068/a-low-cost-bluetooth-low-energy-transceiver-for-wireless-sensor-network-applications-with-a-front-end-receiver-matching-network-reusing-power-amplifier-load-inductor
#3
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
https://www.readbyqxmd.com/read/28421389/preparation-and-biocompatibility-of-demineralized-bone-matrix-sodium-alginate-putty
#4
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...
April 18, 2017: Cell and Tissue Banking
https://www.readbyqxmd.com/read/28416462/clinical-assessment-of-115-cases-of-hindfoot-fusion-with-two-different-types-of-graft-allograft-dbm-bone-marrow-aspirate-versus-autograft-dbm
#5
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
https://www.readbyqxmd.com/read/28414387/multi-point-temperature-sensing-using-a-linear-cavity-lasing-system
#6
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
https://www.readbyqxmd.com/read/28412469/earliest-phases-of-chondrogenesis-are-dependent-upon-angiogenesis-during-ectopic-bone-formation-in-mice
#7
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
https://www.readbyqxmd.com/read/28390951/a-dibenzoylmethane-derivative-inhibits-lipopolysaccharide-induced-no-production-in-mouse-microglial-cell-line-bv-2
#8
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
https://www.readbyqxmd.com/read/28388037/mechanistic-investigation-of-inducing-triboluminescence-in-lanthanide-iii-%C3%AE-diketonate-complexes
#9
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
https://www.readbyqxmd.com/read/28385228/comparative-study-on-the-healing-potential-of-chitosan-polymethylmethacrylate-and-demineralized-bone-matrix-in-radial-bone-defects-of-rat
#10
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
https://www.readbyqxmd.com/read/28383500/a-qos-optimization-approach-in-cognitive-body-area-networks-for-healthcare-applications
#11
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
https://www.readbyqxmd.com/read/28381049/unidirectional-widely-tunable-and-narrow-linewidth-heterogeneously-integrated-iii-v-on-silicon-laser
#12
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
https://www.readbyqxmd.com/read/28381043/design-of-praseodymium-doped-chalcogenide-micro-disk-emitting-at-4-7-%C3%A2%C2%B5m
#13
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
https://www.readbyqxmd.com/read/28380857/photonically-enabled-rf-front-end-for-wideband-flexible-down-conversion
#14
Anjali Agarwal, James M Dailey, Paul Toliver, Thomas C Banwell
We demonstrate a flexible RF photonics down-converter that enables spectral folding of a 2-18 GHz RF band into a common 2 GHz wide intermediate frequency (IF) band for identification of specific signals of interest. The system can then be reconfigured for selective down-conversion of a given sub-band to a common IF output. We present an analysis of the performance of the down-converter and experimentally demonstrate both the spectral folding and selective modes. A sensitivity of -42 dBm in an IF bandwidth of 2 GHz and a spurious free dynamic range of 103 dB...
April 3, 2017: Optics Express
https://www.readbyqxmd.com/read/28380810/wavelength-tunable-single-longitudinal-mode-fiber-optical-parametric-oscillator
#15
L T Lim, M H Abu Bakar, M A Mahdi
We demonstrate a ring cavity single longitudinal mode fiber optical parametric oscillator using a passive sub-ring cavity and an unpumped erbium doped fiber configured with an external fiber mirror for single mode selection. The unpumped erbium doped fiber uses its saturable absorption characteristic to generate a self-induced narrowband filter when two counter-propagating waves interfere inside the fiber. A single longitudinal mode laser is obtained with a linewidth of 17.35 kHz at a pump power of 31.2 dBm...
March 6, 2017: Optics Express
https://www.readbyqxmd.com/read/28375165/power-mosfet-linearizer-of-a-high-voltage-power-amplifier-for-high-frequency-pulse-echo-instrumentation
#16
Hojong Choi, Park Chul Woo, Jung-Yeol Yeom, Changhan Yoon
A power MOSFET linearizer is proposed for a high-voltage power amplifier (HVPA) used in high-frequency pulse-echo instrumentation. The power MOSFET linearizer is composed of a DC bias-controlled series power MOSFET shunt with parallel inductors and capacitors. The proposed scheme is designed to improve the gain deviation characteristics of the HVPA at higher input powers. By controlling the MOSFET bias voltage in the linearizer, the gain reduction into the HVPA was compensated, thereby reducing the echo harmonic distortion components generated by the ultrasonic transducers...
April 4, 2017: Sensors
https://www.readbyqxmd.com/read/28369014/a-comparative-analysis-of-rhbmp-2-dbm-vs-icbg-for-secondary-alveolar-bone-grafts-in-patients-with-cleft-lip-and-palate-review-of-501-cases
#17
Jeffrey A Hammoudeh, Artur Fahradyan, Daniel D Gould, Fan Liang, Thomas Imahiyerobo, Leo Urbinelli, JoAnna T Nguyen, William Magee, Stephen Yen, Mark M Urata
BACKGROUND: Alveolar cleft reconstruction using iliac crest bone graft(ICBG) is considered standard of care for children with complete cleft lip and palate at the time of mixed dentition. Harvesting bone may result in donor site morbidity, additional operating time and length of hospitalization. Recombinant human bone morphogenetic protein(rhBMP)-2 with a demineralized bone matrix(DBM) was used as an alternative bone source for alveolar cleft reconstruction. We investigate the outcomes of rhBMP-2/DBM versus ICBG for alveolar cleft reconstruction by reviewing postoperative surgical complications and cleft closure...
March 31, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28367979/extracellular-vesicle-functionalized-decalcified-bone-matrix-scaffolds-with-enhanced-pro-angiogenic-and-pro-bone-regeneration-activities
#18
Hui Xie, Zhenxing Wang, Liming Zhang, Qian Lei, Aiqi Zhao, Hongxiang Wang, Qiubai Li, Yilin Cao, Wen Jie Zhang, Zhichao Chen
Vascularization is crucial for bone regeneration after the transplantation of tissue-engineered bone grafts in the clinical setting. Growing evidence suggests that mesenchymal stem cell (MSC)-derived extracellular vesicles (EVs) are potently pro-angiogenic both in vitro and in vivo. In the current study, we fabricated a novel EV-functionalized scaffold with enhanced pro-angiogenic and pro-bone regeneration activities by coating decalcified bone matrix (DBM) with MSC-derived EVs. EVs were harvested from rat bone marrow-derived MSCs and the pro-angiogenic potential of EVs was investigated in vitro...
April 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28363055/cardiorespiratory-effects-of-dexmedetomidine-butorphanol-midazolam-dbm-a-fully-reversible-anesthetic-protocol-in-captive-and-semi-free-ranging-cheetahs-acinonyx-jubatus
#19
A Margarita Woc Colburn, Suzan Murray, Lee-Ann C Hayek, Laurie Marker, Carlos R Sanchez
Multiple anesthesia protocols have been used in the cheetah ( Acinonyx jubatus ). Twenty healthy, captive cheetahs were immobilized with dexmedetomidine (15.8 ± 1.9 μg/kg), butorphanol (0.22 ± 0.03 mg/kg), and midazolam (0.18 ± 0.03 mg/kg) by intramuscular injection. Induction, recumbency, and recovery times were recorded, and physiologic parameters were monitored. Anesthesia was antagonized with atipamezole (0.125 ± 0.02 mg/kg) and naltrexone (0.1 ± 0.014 mg/kg) intramuscularly. All cheetahs were safely anesthetized with this protocol...
March 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28358761/histomorphometric-comparison-of-bone-regeneration-in-critical-sized-bone-defects-using-demineralized-bone-matrix-platelet-rich-fibrin-and-hyaluronic-acid-as-bone-substitutes
#20
Alper Sindel, Ömür Dereci, Havva Serap Toru, Sinan Tozoğlu
AIM: To compare bone regeneration in the critical-sized bone defects grafted with demineralized bone matrix, platelet-rich fibrin, and hyaluronic acid in rats. MATERIALS AND METHODS: Forty Wistar Albino rats allocated into 4 experimental groups: platelet-rich fibrin (PRF) group, noncross-linked hyaluronic acid gel (HA) group, demineralized bone matrix in putty form (DBM) group, and control group. A critical-sized defect of 8 mm was formed involving the sagittal suture for each rat under anesthetic induction...
March 29, 2017: Journal of Craniofacial Surgery
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