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https://www.readbyqxmd.com/read/29151152/a-maize-inbred-exhibits-resistance-against-western-corn-rootwoorm-diabrotica-virgifera-virgifera
#1
Lina Castano-Duque, Kenneth W Loades, John F Tooker, Kathleen M Brown, W Paul Williams, Dawn S Luthe
Insect resistance against root herbivores like the western corn rootworm (WCR, Diabrotica virgifera virgifera) is not well understood in non-transgenic maize. We studied the responses of two American maize inbreds, Mp708 and Tx601, to WCR infestation using biomechanical, molecular, biochemical analyses, and laser ablation tomography. Previous studies performed on several inbreds indicated that these two maize genotypes differed in resistance to pests including fall armyworm (Spodoptera frugiperda) and WCR. Our data confirmed that Mp708 shows resistance against WCR, and demonstrates that the resistance mechanism is based in a multi-trait phenotype that includes increased resistance to cutting in nodal roots, stable root growth during insect infestation, constitutive and induced expression of known herbivore-defense genes, including ribosomal inhibitor protein 2 (rip2), terpene synthase 23 (tps23) and maize insect resistance cysteine protease-1 (mir1), as well high constitutive levels of jasmonic acid and production of (E)-β-caryophyllene...
November 18, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29151116/do-alpha-1-antagonist-medications-affect-the-success-of-semi-rigid-ureteroscopy-a-prospective-randomised-single-blind-multicentric-study
#2
Mustafa Aydın, Muhammet Fatih Kılınç, Abdulmecit Yavuz, Göksel Bayar
The objective of this study is to assess the efficacy of adjunctive silodosin therapy in improving the success rate of semi-rigid ureteroscopy for removing ureteral stones. Prospective randomised controlled clinical trial performed between July 2016 and September 2016. All the patients underwent ureteroscopic holmium lithotripsy with a YAG laser. The patients were randomised into one of three groups: those who did not use an alpha-1 blocker (AB) (Group 1, n = 50), those who used an AB for one day (Group 2, n = 50), and those who used an AB for three days (Group 3, n = 47)...
November 18, 2017: Urolithiasis
https://www.readbyqxmd.com/read/29150627/high-efficiency-backward-four-wave-mixing-by-quantum-interference
#3
Zi-Yu Liu, Jian-Ting Xiao, Jia-Kang Lin, Jun-Jie Wu, Jz-Yuan Juo, Chin-Yao Cheng, Yong-Fan Chen
Electromagnetically-induced-transparency-based four-wave mixing (FWM) in a resonant four-level double-Λ system has a maximum conversion efficiency (CE) of 25% due to spontaneous emission. Herein, we demonstrate that spontaneous emission can be considerably suppressed by arranging the applied laser beams in a backward configuration. With the backward double-Λ FWM scheme, we observe a CE of 63% in cold rubidium atoms with an optical depth (OD) of 48. To the best of our knowledge, this is the first observation of a CE exceeding the conversion limit in resonant FWM processes...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150331/anti-amyloidogenic-and-anti-apoptotic-effect-of-%C3%AE-bisabolol-against-a%C3%AE-induced-neurotoxicity-in-pc12-cells
#4
Balakrishnan Shanmuganathan, Venkatesan Suryanarayanan, Sethuraman Sathya, Muralidharan Narenkumar, Sanjeev Kumar Singh, Kandasamy Ruckmani, Kasi Pandima Devi
Alzheimer's disease (AD) is a life-threatening neurodegenerative disorder leading to dementia, with a progressive decline in memory and other thinking skills of elderly populace. Of the multiple etiological factors of AD, the accumulation of senile plaques (SPs) particularly as Aβ oligomers correlates with the relentlessness cognitive impairment in AD patients and play a vital role in AD pathology. Since natural essential oil constituents have successfully served as a source of drugs for AD treatment, the present study aims at the in vitro and in silico investigation of anti-amyloidogenic potential and anti-apoptotic property of the α-bisabolol against Aβ25-35 induced neurotoxicity in PC12 cells...
October 10, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29150153/-dermatologic-surgery-hemophilia-and-von-willebrand-disease
#5
M Say, N Dupin, N Stieltjes, M-F Avril, S Aractingi, J Chanal
BACKGROUND: Von Willebrand disease (VWD) and hemophilia A and B are the most common types of hereditary coagulation-factor deficiencies. The frequency and type of complications of skin surgery in these patients are unknown. The increasing incidence of skin cancer prompted us to reflect upon this issue. While the incidence of skin cancer is increasing, the complications of skin surgery or ablative laser treatment remain unknown in this population. AIM: The aim of this study was to determine the frequency of bleeding complications during and after skin surgery in patients with a hereditary coagulation-factor deficiency (hemophilia or VWD)...
November 14, 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/29150016/low-level-laser-therapy-may-reduce-postoperative-pain-levels-after-root-canal-retreatment-in-patients-with-low-preoperative-pain-levels
#6
Romina Brignardello-Petersen
No abstract text is available yet for this article.
November 11, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/29149991/a-fast-and-low-cost-microfabrication-approach-for-six-types-of-thermoplastic-substrates-with-reduced-feature-size-and-minimized-bulges-using-sacrificial-layer-assisted-laser-engraving
#7
Longjun Gu, Guodong Yu, Cheuk-Wing Li
Since polydimethylsiloxane (PDMS) is notorious for its severe sorption to biological compounds and even nanoparticles, thermoplastics become a promising substrate for microdevices. Although CO2 laser engraving is an efficient method for thermoplastic device fabrication, it accompanies with poor bonding issues due to severe bulging and large feature size determined by the diameter of laser beam. In this study, a low-cost microfabrication method is proposed by reversibly sealing a 1 mm thick polymethylmethacrylate (PMMA) over an engraving substrate to reduce channel feature size and minimize bulges of laser engraved channels...
January 2, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29149812/architectures-and-mechanical-properties-of-drugs-and-complexes-of-surface-active-compounds-at-air-water-and-oil-water-interfaces
#8
Dipak K Sarker
BACKGROUND: Drugs can represents a multitude of compounds from proteins and peptides, such as growth hormones and insulin and on to simple organic molecules such as flurbiprofen, ibuprofen and lidocaine. Given the chemical nature of these compounds two features are always present. A portion or portions of the molecule that has little affinity for apolar surfaces and media and the opposite a series of part or one large part that has considerable affinity for hydrophilic, polar or charged media and surfaces...
November 17, 2017: Current Drug Discovery Technologies
https://www.readbyqxmd.com/read/29149729/functionalized-gold-nanoparticles-as-affinity-nanoprobes-for-multiple-lectins
#9
Karuppuchamy Selvaprakash, Yu-Chie Chen
Glycan-lectin interactions are commonly observed in nature. Analytical methods, which are used to detect lectins that rely on the use of glycan ligand-modified nanoprobes as affinity probes, have been developed. Most of the existing methods are focused on the use of synthetic glycan ligands. Nevertheless, naturally available glycoproteins, such as ovalbumin in chicken egg whites, are good sources for fabricating glycan-immobilized nanoprobes. In this study, we generated functionalized gold nanoparticles (Au NPs) from a one-pot reaction by reacting chicken egg white (cew) proteins with aqueous tetrachloroaurate...
November 8, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29149689/an-extended-sequence-specificity-for-uv-induced-dna-damage
#10
Long H Chung, Vincent Murray
The sequence specificity of UV-induced DNA damage was determined with a higher precision and accuracy than previously reported. UV light induces two major damage adducts: cyclobutane pyrimidine dimers (CPDs) and pyrimidine(6-4)pyrimidone photoproducts (6-4PPs). Employing capillary electrophoresis with laser-induced fluorescence and taking advantages of the distinct properties of the CPDs and 6-4PPs, we studied the sequence specificity of UV-induced DNA damage in a purified DNA sequence using two approaches: end-labelling and a polymerase stop/linear amplification assay...
November 2, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29149571/imaging-and-spectroscopy-of-single-metal-nanostructure-absorption
#11
Anneli Joplin, Wei-Shun Chang, Stephan Link
The highly tunable optical properties of metal nanoparticles make them an ideal building block in any application that requires control over light, heat, or electrons on the nanoscale. Because of their size, metal nanoparticles both absorb and scatter light efficiently. Consequently, improving their performance often involves shifting the balance between absorption and scattering to promote desirable features of their optical properties. Scattering by single metal nanoparticles is commonly characterized using dark-field scattering spectroscopy, but routine methods to characterize pure absorption over a broad wavelength range are much more complex...
November 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29149546/the-photophysical-and-photoacoustic-properties-of-quadrupolar-borondifluoride-curcuminoid-dyes
#12
Stephanie Bellinger, Maryam Hatamimoslehabadi, Seema Bag, Farha Mithila, Jeffrey La, Mathieu Frennete, Samir Laoui, David Szalda, Chandra Yelleswarapu, Jonathan Rochford
The synthesis and characterization of a series of donor-π-acceptor-π-donor (D-A-D) curcuminoid molecules are here presented incorporating π-extended aryl and electron-donating amino terminal functionalization. Computational evaluation shows these molecules possess quadrupolar character with the lowest energy transitions displaying high molar extinction coefficients with broad tunability through manipulation of terminal donating groups. Consistent with their quadrupolar nature, these molecules show varying degrees of solvatochromic behavior in both their absorption and emission spectra which has been analyzed by Lippert-Mataga and Kamlet-Taft analysis...
November 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29149542/spectrally-encoded-coherence-tomography-and-reflectometry-sectr-simultaneous-en-face-and-cross-sectional-imaging-at-2-gigapixels-per-second
#13
Mohamed T El-Haddad, Ivan Bozic, Yuankai K Tao
Non-invasive biological imaging is crucial for understanding in vivo structure and function. Optical coherence tomography (OCT) and reflectance confocal microscopy are two of the most widely used optical modalities for exogenous contrast-free high-resolution three-dimensional imaging in non-fluorescent scattering tissues. However, sample motion remains a critical barrier to raster-scanned acquisition and reconstruction of wide-field anatomically accurate volumetric datasets. We introduce spectrally encoded coherence tomography and reflectometry (SECTR), a high-speed multimodality system for simultaneous OCT and spectrally-encoded reflectance (SER) imaging...
November 17, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/29149145/endoscopic-epidural-laser-decompression-versus-transforaminal-epiduroscopic-laser-annuloplasty-for-lumbar-disc-herniation-a-prospective-randomized-trial
#14
Chang Hong Park, Sang Ho Lee
BACKGROUND: Lumbar radicular pain often results from lumbar disc herniation, spinal stenosis, or degenerative spondylolisthesis. Minimally invasive disc decompression procedures, such as nucleo-annuloplasty or epiduroscopic neural decompression by laser, have been devised to treat such pain. OBJECTIVE: The short-term outcomes of disc decompression by endoscopic epidural laser decompression (EELD) or transforaminal epiduroscopic laser annuloplasty (TELA) were compared in patients with lumbar radicular pain due to disc herniation...
November 2017: Pain Physician
https://www.readbyqxmd.com/read/29149053/laser-induced-breakdown-spectroscopy-for-rapid-discrimination-of-heavy-metal-contaminated-seafood-tegillarca-granosa
#15
Guoli Ji, Pengchao Ye, Yijian Shi, Leiming Yuan, Xiaojing Chen, Mingshun Yuan, Dehua Zhu, Xi Chen, Xinyu Hu, Jing Jiang
Tegillarca granosa samples contaminated artificially by three kinds of toxic heavy metals including zinc (Zn), cadmium (Cd), and lead (Pb) were attempted to be distinguished using laser-induced breakdown spectroscopy (LIBS) technology and pattern recognition methods in this study. The measured spectra were firstly processed by a wavelet transform algorithm (WTA), then the generated characteristic information was subsequently expressed by an information gain algorithm (IGA). As a result, 30 variables obtained were used as input variables for three classifiers: partial least square discriminant analysis (PLS-DA), support vector machine (SVM), and random forest (RF), among which the RF model exhibited the best performance, with 93...
November 17, 2017: Sensors
https://www.readbyqxmd.com/read/29148919/bacterial-flora-analysis-of-coliforms-in-sewage-river-water-and-ground-water-using-maldi-tof-mass-spectrometry
#16
Yoshihiro Suzuki, Kouki Niina, Tomonori Matsuwaki, Kei Nukazawa, Atsushi Iguchi
The aim of this study was to rapidly and effectively analyze coliforms, which are the most fundamental indicators of water quality for fecal pollution, using matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS). Coliform bacteria were isolated from municipal sewage, river water, and groundwater. For each sample, 100 isolates were determined by MALDI-TOF MS. In addition, these same 100 isolates were also identified via 16S rRNA gene sequence analysis. Obtained MALDI-TOF MS data were compared with the 16S rRNA sequencing analysis, and the validity of MALDI-TOF MS for classification of coliform bacteria was examined...
November 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29148851/airway-geometry-airway-flow-and-particle-measurement-methods-implications-on-pulmonary-drug-delivery
#17
A Kourmatzis, S Cheng, H-K Chan
The effectiveness of drug delivery to the lungs is inextricably linked to the fundamental interactions that occur between particles and flow in the extrathoracic airway. Research in this field requires time resolved in-vivo and in-vitro measurements of three separate, yet intricately linked parameters: i) airway flow, ii) airway geometry, and iii) drug particle characteristics. A number of recent significant developments have been made in the experimental diagnostic tools used to characterise these parameters...
November 17, 2017: Expert Opinion on Drug Delivery
https://www.readbyqxmd.com/read/29148780/a-spectroscopic-study-of-the-interaction-of-carboxyl-modified-gold-nanoparticles-with-liposomes-of-different-chain-lengths-and-controlled-drug-release-by-layer-by-layer-technology
#18
Nishu Kanwa, Soumya Kanti Dey, Chandan Adhikari, Anjan Chakraborty
In this manuscript, we investigate the interactions of carboxyl modified gold nanoparticles (AuC) with zwitterionic phospholipid liposomes of different chain lengths using a well-known membrane probe PRODAN by steady state and time resolved spectroscopy. We used three zwitterionic lipids, namely, dipalmitoylphosphatidylcholine (DPPC), 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC), and 1,2-dilauroyl-sn-glycero-3-phosphocholine (DLPC); which are widely different in their phase transition temperatures to form liposome-AuC assemblies...
November 17, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29148776/coagulation-of-metals-in-superfluid-and-normal-liquid-helium
#19
Eugene B Gordon, Alexander Vladimirovich Karabulin, Mikhail I Kulish, Vladimir Igorevich Matyushenko, Maxim E Stepanov
The thermal emission study in this work has shown that coagulation of metals in liquid helium is accompanied by enormous local overheating of several thousand degrees. Direct experiments demonstrated, for the first time, that condensation of metals in superfluid helium occurs via the specific mechanism which is substantially faster than that in normal liquid helium. It has been stated that coagulation of metals in superfluid helium indeed occurs in two stages - a "hot" one of nanoparticles coalescence with the formation of molten nanospheres and the subsequent stage of their sticking together into nanowires...
November 17, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29148717/raman-spectroscopy-of-single-light-absorbing-carbonaceous-particles-levitated-in-air-using-an-annular-laser-beam
#20
Masaru Uraoka, Keisuke Maegawa, Shoji Ishizaka
A laser trapping technique is a powerful means to investigate the physical and chemical properties of single aerosol particles in a non-contact manner. However, optical trapping of strongly light-absorbing particles such as black carbon or soot is quite difficult because the repulsive force caused by heat is orders of magnitude larger than the attractive force of radiation pressure. In this study, a laser trapping and Raman microspectroscopy system using an annular laser beam was constructed to achieve non-contact levitation of single light-absorbing particles in air...
November 17, 2017: Analytical Chemistry
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