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https://www.readbyqxmd.com/read/28445099/laparoscopic-spigelian-hernia-repair-intraperitoneal-onlay-mesh-plus-technique-video-presentation
#1
Dimitrios Zacharoulis, Eleni Sioka
BACKGROUND: Spigelian hernia represents a rare entity. Traditionally, it was repaired by the open technique. Various laparoscopic techniques have emerged periodically. Most laparoscopic repairs use the technique of placing an intraperitoneal onlay mesh (IPOM). There is currently a tendency to close the hernia defect. METHODS: A 68-year-old man was admitted to our hospital complaining of vague abdominal pain and discomfort. Physical examination revealed a bulky palpable mass on the left side of the patient...
April 26, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28444700/fluorescence-lifetime-imaging-and-super-resolution-microscopies-shed-light-on-the-directed-and-self-assembly-of-functional-porphyrins-onto-carbon-nanotubes-and-flat-surfaces
#2
Boyang Mao, David González Calatayud, Vincenzo Mirabello, Haobo Ge, Benjamin J Hodges, Robert M J Jacobs, Ashley M Shepherd, José Alberto Ribeiro Martins, Navaratnarajah Kuganathan, Jorge Bernardino De La Serna, Stanley W Botchway, Sofia Ioana Pascu
Two new routes to functionalized SWNTs have been established using a bulky Zn(II)-porphyrin featuring thiolate groups at the periphery. We probed the optical properties of this Zinc(II)-substituted, bulky aryl porphyrin and those of the corresponding new nano-composites with single walled carbon nanotube (SWNTs) and coronene, as a model for graphene. We report hereby on: (i) the supramolecular interactions between the pristine SWNTs and Zn(II)-porphyrin by virtue of π-π stacking, and (ii) a novel covalent binding strategy based on the Bingel reaction...
April 25, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28444558/evolution-of-surgical-treatment-for-rectal-cancer-a-review
#3
Sanjeev Dayal, Nick Battersby, Tom Cecil
Surgery that produces an optimal total mesorectal excision (TME) resection specimen remains the cornerstone of curative rectal cancer management. In the modern era, despite the results of recent randomised trials, laparoscopic TME is a crucial technique in the TME surgery armamentarium. Laparoscopic surgery offers the benefit of magnified views that aid sharp and precise dissection. However operating in the confines of a narrow pelvis, particularly when the mesorectum is bulky, requires significant technical skill...
April 25, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/28441739/the-use-of-immus-in-a-water-environment-instrument-validation-and-application-of-3d-multi-body-kinematic-analysis-in-medicine-and-sport
#4
Anna Lisa Mangia, Matteo Cortesi, Silvia Fantozzi, Andrea Giovanardi, Davide Borra, Giorgio Gatta
The aims of the present study were the instrumental validation of inertial-magnetic measurements units (IMMUs) in water, and the description of their use in clinical and sports aquatic applications applying customized 3D multi-body models. Firstly, several tests were performed to map the magnetic field in the swimming pool and to identify the best volume for experimental test acquisition with a mean dynamic orientation error lower than 5°. Successively, the gait and the swimming analyses were explored in terms of spatiotemporal and joint kinematics variables...
April 22, 2017: Sensors
https://www.readbyqxmd.com/read/28441722/experimental-demonstration-and-circuitry-for-a-very-compact-coil-only-pulse-echo-emat
#5
Dirk Rueter
This experimental study demonstrates for the first time a solid-state circuitry and design for a simple compact copper coil (without an additional bulky permanent magnet or bulky electromagnet) as a contactless electromagnetic acoustic transducer (EMAT) for pulse echo operation at MHz frequencies. A pulsed ultrasound emission into a metallic test object is electromagnetically excited by an intense MHz burst at up to 500 A through the 0.15 mm filaments of the transducer. Immediately thereafter, a smoother and quasi "DC-like" current of 100 A is applied for about 1 ms and allows an echo detection...
April 22, 2017: Sensors
https://www.readbyqxmd.com/read/28440975/follicular-lymphoma-an-institutional-analysis
#6
Ajay Gogia, Vinod Raina, Lalit Kumar, Atul Sharma, Mehar Chand Sharma, Saumya Ranjan Mallick
Background: Follicular lymphoma (FL) is second most common lymphoma in adult, constituted 20% of all lymphoma cases in the west. There is limited information is available on FL from India. Methods: The clinico-pathological profile, treatment outcome and prognostic factors for survival were assessed retrospectively in 181 patients of FL seen at our center over a period of 17 years ( 1996-2012). Results: There were 120 males and 61 females. The median age was 51 years (24-80 years). The common presenting features were lymphadenopathy 71%, fatigue 23% and fever 20%...
March 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28440836/controllable-hydrothermal-synthesis-of-ni-h-bea-with-a-hierarchical-core-shell-structure-and-highly-enhanced-biomass-hydrodeoxygenation-performance
#7
Bing Ma, Huimei Cui, Darui Wang, Peng Wu, Chen Zhao
Ni based catalysts are wildly used in catalytic industrial processes due to their low costs and high activities. The design of highly hierarchical core-shell structured Ni/HBEA is achieved using a sustainable, simple, and easy-tunable hydrothermal synthesis approach using combined NH4Cl and NH3·H2O as a co-precipitation agent at 120 °C. Starting from a single-crystalline hierarchical H(+)-exchanged beta polymorph zeolite (HBEA), the adjustment of the precipitate conditions shows that mixed NH4Cl and NH3·H2O precipitates with proper concentrations are vital in the hydrothermal synthesis for preserving a good crystalline morphology of HBEA and generating abundant highly-dispersed Ni nanoparticles (loading: 41 wt%, 5...
April 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28439585/controlled-ring-opening-polymerization-of-%C3%AE-amino-acid-n-carboxy-anhydride-by-frustrated-amine-borane-lewis-pairs
#8
Hongyuan Zhang, Yanzhao Nie, Xinmei Zhi, Haifeng Du, Jing Yang
In this communication, we presented a novel strategy to control the ROP of α-amino acid N-carboxy-anhydrides using the concept of frustrated Lewis pairs (FLPs). An FLP intermediate containing an interaction between the bulky borane Lewis acid and the amine groups of the propagation chain end is essential to accomplish the polypeptide synthesis with well-defined structures under mild conditions.
April 25, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28437993/integrated-optical-force-sensors-using-focusing-photonic-crystal-arrays
#9
Jingkun Guo, Richard A Norte, S Gröblacher
Mechanical oscillators are at the heart of many sensor applications. Recently several groups have developed oscillators that are probed optically, fabricated from high-stress silicon nitride films. They exhibit outstanding force sensitivities of a few aN/Hz<sup>1/2</sup> and can also be made highly reflective, for efficient detection. The optical read-out usually requires complex experimental setups, including positioning stages and bulky cavities, making them impractical for real applications. In this paper we propose a novel way of building fully integrated all-optical force sensors based on low-loss silicon nitride mechanical resonators with a photonic crystal reflector...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28436556/theoretical-evidence-for-bond-stretch-isomerism-in-grubbs-olefin-metathesis
#10
Premaja R Remya, Cherumuttathu H Suresh
A comprehensive density functional theory study on the dissociative and associative mechanisms of Grubbs first and second generation olefin metathesis catalysis reveals that ruthenacyclobutane intermediate (RuCB) observed in the Chauvin mechanism is not unique as it can change to a non-metathetic ruthenacyclobutane (RuCB') via the phenomenon of bond stretch isomerism (BSI). RuCB and RuCB' differ mainly in RuCα , RuCβ , and Cα Cβ bond lengths of the metallacycle. RuCB is metathesis active due to the agostic type bonding-assisted simultaneous activation of both Cα Cβ bonds, giving hypercoordinate character to Cβ whereas an absence of such bonding interactions in RuCB' leads to typical CC single bond distances and metathesis inactivity...
April 24, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28436173/relationship-between-endobronchial-ultrasound-guided-ebus-transbronchial-needle-aspiration-utility-and-computed-tomography-staging-node-size-at-ebus-and-positron-emission-tomography-scan-node-standard-uptake-values-a-retrospective-analysis
#11
Clare Marchand, Andrew R L Medford
BACKGROUND: Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) diagnoses and stages mediastinal lymph node pathology. This retrospective study determined the relationship between EBUS-TBNA utility and non-small cell lung cancer (NSCLC) stage, lymph node size, and positron emission tomography (PET) standard uptake values (SUV), and the utility of neck ultrasound in bulky mediastinal disease. METHODS: Data of 284 consecutive patients who had undergone EBUS-TBNA was collected...
April 24, 2017: Thoracic Cancer
https://www.readbyqxmd.com/read/28435949/cooperative-carbon-monoxide-to-formyl-reduction-at-a-trifunctional-pbb-frustrated-lewis-pair
#12
Long Wang, Senwang Zhang, Yasuharu Hasegawa, Constantin G Daniliuc, Gerald Kehr, Gerhard Erker
Twofold hydroboration of the bulky Mes*P(vinyl)2 phosphane with Piers' borane [HB(C6F5)2] followed by C6F5/H exchange with 9-BBN generated a reactive P/B/BH FLP structure that cleanly reduced carbon monoxide at the trifunctional frustrated Lewis pair framework to the [B]-formyl stage.
April 24, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28430280/potassium-complexes-supported-by-monoanionic-tetradentate-amino-phenolate-ligands-synthesis-structure-and-catalysis-in-the-ring-opening-polymerization-of-rac-lactide
#13
Chenhui Yao, Yang Yang, Shaoan Xu, Haiyan Ma
A series of potassium complexes bearing monoanionic tetradentate amino-phenolate ligands, [LK]2 (L = {(2-R(1))C6H4CH2N[(CH2)2R(2)]CH2(4-R(4)-6-R(3))C6H2O-}, R(1) = NMe2, R(2) = NEt2, R(3) = CPh3, R(4) = Me (1); R(1) = R(2) = NEt2, R(3) = CPh3, R(4) = Me (2); R(1) = NMe2, R(2) = NEt2, R(3) = R(4) = cumyl (4); R(1) = R(2) = OMe, R(3) = (t)Bu, R(4) = Me (6); L = (2-NMe2)C6H4CH2N[[CH2-(S)-1-butylpyrrolidinyl]CH2(4-Me-6-CPh3)C6H2O-] (3)), have been synthesized via reactions of KN(SiMe3)2 and 1 equiv. of the corresponding aminophenols...
April 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28429503/cleavage-of-a-p-p-double-bond-mediated-by-n-heterocyclic-carbenes
#14
Naoki Hayakawa, Kazuya Sadamori, Shota Tsujimoto, Miho Hatanaka, Tomonari Wakabayashi, Tsukasa Matsuo
The reaction of the bulky diphosphenes (Rind)P=P(Rind) (1; Rind=1,1,3,3,5,5,7,7-octa-R-substituted s-hydrindacen-4-yl) with two molecules of N-heterocyclic carbene (NHC; 1,3,4,5-tetramethylimidazol-2-ylidene) resulted in the quantitative formation of the NHC-bound phosphinidenes NHC→P(Rind) (2), along with the cleavage of the P=P double bond. The reaction times are dependent on the steric size of the Rind groups (11 days for 2 a (R=Et) and 2 h for 2 b (R=Et, Me) at room temperature). The mechanism for the double bond-breaking is proposed to proceed via the formation of the NHC-coordinated, highly polarized diphospehenes 3 as an intermediate...
April 21, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28428773/mutation-at-g103-of-mtbftsz-altered-their-sensitivity-to-coumarins
#15
Duggirala Sridevi, Karpagam U Sudhakar, Ragamanvitha Ananthathatmula, Rakesh P Nankar, Mukesh Doble
Coumarins are natural polyphenol lactones comprising of fused rings of benzene and α-pyrone. The current study demonstrates the inhibitory effect of coumarins with various substitutions on Mycobacterium smegmatis mc(2) 155. We also demonstrate the effect of pomegranate (Punica granatum) extract containing ellagic acid, on M. smegmatis as well as their affect on MtbFtsZ (FtsZ from Mycobacterium tuberculosis). The ellagic acid extracts from pomegranate peels inhibit mycobacteria with a MIC of 25 μM and 0.3 to 3...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28422482/organosilica-nanoparticles-with-an-intrinsic-secondary-amine-an-efficient-and-reusable-adsorbent-for-dyes
#16
Fang Chen, Eric Zhao, Taeho Kim, Junxin Wang, Ghanim Hableel, Philip James Thomas Reardon, Soundaram J Ananthakrishnan, Tianyu Wang, Santiago J Arconada-Alvarez, Jonathan C Knowles, Jesse V Jokerst
Nanomaterials are promising tools in water remediation due to their large surface area and unique properties compared to bulky materials. We synthesized an organosilica nanoparticle (OSNP) and tuned its composition for anionic dye removal. The adsorption mechanisms are electrostatic attraction and hydrogen bonding between the amine on OSNP and the dye, and the surface charge of the OSNP can be tuned to adsorb either anionic or cationic dyes. Using phenol red as a model dye, we studied the effect of the amine group, pH, ionic strength, time, dye concentration, and nanomaterial mass on the adsorption...
April 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28422287/genetic-variants-as-potential-predictive-biomarkers-in-advanced-colorectal-cancer-patients-treated-with-oxaliplatin-based-chemotherapy
#17
REVIEW
Afsane Bahrami, Forouzan Amerizadeh, Seyed Mahdi Hassanian, Soodabeh ShahidSales, Majid Khazaei, Mina Maftouh, Majid Ghayour-Mobarhan, Gordon A Ferns, Amir Avan
Chemotherapy regimen containing oxaliplatin is often the first-line treatment for patient with advanced colorectal cancer. Oxaliplatin binds to DNA, leading to the formation of crosslinks and bulky adducts. Approximately 50% of patients with CRC benefit from treatment with oxaliplatin. It is possible that genetic variants in biological pathways involved in drug transportation, drug metabolism, DNA damage repair, and cell cycle modulation might affect the activity, or efficacy of oxaliplatin. Because oxaliplatin resistance may be related to these genetic variants and may therefore be an important reason for treatment failure, we have summarized the genetic variations that have been reported to be predictive markers of the response to oxaliplatin based therapy in patients with advanced CRC...
April 19, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28421770/selective-synthesis-of-e-and-z-allyl-nitriles-via-decarboxylative-reactions-of-alkynyl-carboxylic-acids-with-azobis-alkylcarbonitriles
#18
Francis Mariaraj Irudayanathan, Sunwoo Lee
Allyl nitriles were synthesized from the reactions of arylpropiolic acids with azobis(alkylcarbonitriles) (AIBN or ACCN). In the presence of Cu(OAc)2 as a catalyst and pyridine as the solvent, the (E)-stereoisomer was formed as the major product. This transformation shows good tolerance toward alkoxy, halogen, alcohol, amine, ester, and ketone functional groups. When the reaction was conducted with the sterically bulky amine, ethyldiisopropylamine, in the absence of a copper catalyst, the corresponding (Z)-stereoisomers were formed preferentially...
April 19, 2017: Organic Letters
https://www.readbyqxmd.com/read/28421757/a-bulky-disulfoxide-ligand-for-pd-catalyzed-oxidative-allylic-c-h-amination-with-2-2-2-trichloroethyl-tosyl-carbamate
#19
You-Gui Li, Li Li, Ming-Yue Yang, Gang He, Eric Assen B Kantchev
Challenging substrates and conditions in homogeneous catalysis pose stringent demands on the ligands used. A novel, bulky, 1-adamantyl-substituted disulfoxide ligand designed after a systematic evaluation of the electronic and steric properties of disulfoxide substituents permits the allylic oxidative C-N coupling reaction to proceed at lower catalyst loading while requiring a smaller excess of reagents. Additionally, this ligand improves the yields when TsNHCOOCH2CCl3, a novel reagent that permits deprotection of the products under both acidic and basic conditions, is used...
April 26, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28421740/enhancing-the-performance-of-quantum-dot-light-emitting-diodes-using-room-temperature-processed-ga-doped-zno-nanoparticles-as-the-electron-transport-layer
#20
Sheng Cao, Jinju Zheng, Jialong Zhao, Zuobao Yang, Chengming Li, Xinwei Guan, Weiyou Yang, Minghui Shang, Tom Wu
Colloidal ZnO nanoparticle (NP) films are recognized as efficient electron transport layers (ETLs) for quantum dot light-emitting diodes (QD-LEDs) with good stability and high efficiency. However, because of the inherently high work function of such films, spontaneous charge transfer occurs at the QD/ZnO interface in such a QD-LED, thus leading to reduced performance. Here, to improve the QD-LED performance, we prepared Ga-doped ZnO NPs with low work functions and tailored band structures via a room-temperature (RT) solution process without the use of bulky organic ligands...
April 19, 2017: ACS Applied Materials & Interfaces
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