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Sima Roy, Shuvam Pramanik, Sarat Chandra Patra, Basab Adhikari, Abhishake Mondal, Sanjib Ganguly, Kausikisankar Pramanik
Bis-azoaromatic electron traps, viz. 2-(2-pyridylazo)azoarene 1, have been synthesized by colligating electron-deficient pyridine and azoarene moieties, and they act as apposite proradical templates for the formation of stable open-shell diradical complexes [(1(•-))Rh(III)(1(•-))](+) ([2](+)), starting from the low-valent electron reservoir [Rh(I)]. The less stable monoradical [Rh(III)(1(•-))Cl2(PPh3)3] (3) has also been isolated as a minor product. These π-radical complexes are multiredox systems, and the electron transfer processes occur exclusively within the pincer-type NNN ligand backbone 1...
October 13, 2017: Inorganic Chemistry
Dao-Xin Hong, Jin-Song Su, Jian Wen, Jing Zhang, Yi Zhang
The investigation aims to better understand the resource status of Rhodiola kirilowii, analysis the suitable habitat of wild Rh. kirilowii and protect the wild resources of Rh. Kirilowii, promoting the sustainable utilization of Rh. kirilowii resources. In this paper, we investigated the wild resources of Rh. kirilowii in 16 counties of Sichuan, Qinghai, Gansu and Yunnan by means of investigation and sampling investigation combined with interview. The results showed that the population densities of wild Rh...
March 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Evan C Meszaros, Charles J Malemud
Two immortalized human juvenile chondrocyte cell lines, T/C28a2 and C28/I2, were employed to determine the extent to which recombinant human (rh) IL-6, a known cytokine activator of the Janus kinase/signal transducers and activators of transcription (JAK/STAT) pathway in many cell types, caused STAT proteins to be phosphorylated. The results showed that STAT3 was constitutively phosphorylated in the absence of rhIL-6 in T/C28a2 chondrocytes. However, C28/I2 chondrocytes treated with rhIL-6 caused STAT1, STAT3, and STAT5 to be phosphorylated without altering total unphosphorylated STAT proteins...
2017: Journal of Inflammation Research
Parind M Desai, Vibha Puri, David Brancazio, Bhakti S Halkude, Jeremy E Hartman, Aniket V Wahane, Alexander R Martinez, Keith D Jensen, Eranda Harinath, Richard D Braatz, Jung-Hoon Chun, Bernhardt L Trout
We developed and evaluated a solvent-free injection molding (IM) coating technology that could be suitable for continuous manufacturing via incorporation with IM tableting. Coating formulations (coating polymers and plasticizers) were prepared using hot-melt extrusion and screened via stress-strain analysis employing a universal testing machine. Selected coating formulations were studied for their melt flow characteristics. Tablets were coated using a vertical injection molding unit. Process parameters like softening temperature, injection pressure, and cooling temperature played a very important role in IM coating processing...
October 9, 2017: European Journal of Pharmaceutics and Biopharmaceutics
Wade Henke, Davide Lionetti, William Moore, Julie Hopkins, Victor Day, James Blakemore
We demonstrate that [Cp*Rh] complexes bearing substituted 2,2´-bipyridyl ligands are effective hydrogen-evolution catalysts (Cp* = η5-pentamethylcyclopentadienyl). Disubstitution (at the 4 and 4´ positions) of the bipyridyl ligand (namely -tBu, -H, and -CF3) modulates the catalytic overpotential, in part due to involvement of reduced ligand character in formally rhodium(I) intermediates. These reduced species are synthesized and isolated here; protonation results in formation of complexes bearing the unusual η4-pentamethylcyclopentadiene ligand, and the properties of these protonated intermediates further govern catalytic performance...
October 10, 2017: ChemSusChem
Maria Buerstmayr, Barbara Steiner, Christian Wagner, Petra Schwarz, Klaus Brugger, Delfina Barabaschi, Andrea Volante, Giampiero Valè, Luigi Cattivelli, Hermann Buerstmayr
The Qfhs.ifa-5A allele, contributing to enhanced Fusarium head blight resistance in wheat, resides in a low recombinogenic region of chromosome 5A close to the centromere. A near isogenic RIL population segregating for the Qfhs.ifa-5A resistance allele was developed and among 3650 lines as few as four recombined within the pericentromeric C-5AS1-0.40 bin, yielding only a single recombination point. Genetic mapping of the pericentromeric region using a recombination dependent approach was thus not successful...
October 11, 2017: Plant Biotechnology Journal
S M Nizam Uddin, Yuki Nagao
Controllable synthesis of organic thin film materials on solid surfaces is a challenging issue in the research field of surface science as it is affected by several physical parameters. In this work, we demonstrated a solution-based molecular layer deposition (MLD) approach to prepare porphyrin-based covalent organic molecular networks on a 3-aminopropyl trimethoxysilane (APTMS) modified substrate surface using the urea coupling reaction between 1,4-phenylene diisocyanate (1,4-PDI) and 5,10,15,20-tetrakis-(4-aminophenyl) porphyrin (H2TAPP) at room temperature (22 ± 2 ºC)...
October 12, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
Lauren C Burrows, Luke T Jesikiewicz, Gang Lu, Steven J Geib, Peng Liu, Kay M Brummond
The Rh(I)-catalyzed allenic Pauson-Khand reaction (APKR) is an efficient, redox-neutral method of synthesizing α-acyloxy cyclopentenones. An enantioselective APKR could provide access to chiral, nonracemic α-acyloxy and α-hydroxy cyclopentenones and their corresponding redox derivatives, such as thapsigargin, a cytotoxic natural product with potent antitumor activity. Rapid scrambling of axial chirality of allenyl acetates in the presence of Rh(I) catalysts enables the conversion of racemic allene to enantiopure cyclopentenone product in a dynamic kinetic asymmetric transformation (DyKAT)...
October 12, 2017: Journal of the American Chemical Society
E C Pinchao, P Sotelo, G González, T Kondo
The coccinellid beetle Anovia punica Gordon (Coleoptera: Coccinellidae: Noviini) is an important predator of the Colombian fluted scale, Crypticerya multicicatrices Kondo & Unruh (Hemiptera: Monophlebidae). In order to gather information on the biological traits of A. punica, we conducted a series of studies, including of the developmental time of each life history stage, estimation of life table parameters, and predation rates under laboratory conditions [25.1 ± 1.6°C, with 70.5 ± 7.3% RH, and natural light regime, approx...
October 12, 2017: Neotropical Entomology
Lin Zhang, Bin Hu, Hang Song, Linjun Yang, Long Ba
Membrane fouling induced by industrial flue gas deteriorates their gas capturing efficiency, which is mainly caused by the adhesion of aerosol particles. To fully understand the mechanism of membrane fouling, a quantitative study of the adhesion force of particle on membrane surface was investigated by atomic force microscopy (AFM). The adhesion force of a single particle with flat glass, silicon wafer, PP (polypropylene) membrane, and fly-ash particles were measured within the relative humidity (RH) of 0 ~ 85%...
October 11, 2017: Scientific Reports
Rishi Bolia, Sahana Shankar, Lauren Herd, Winita Hardikar
No abstract text is available yet for this article.
October 10, 2017: Transplantation
Eric S Muckley, Michael Naguib, Hsiu-Wen Wang, Lukas Vlcek, Naresh C Osti, Robert L Sacci, Xiahan Sang, Raymond R Unocic, Yu Xie, Madhusudan Tyagi, Eugene Mamontov, Katharine L Page, Paul R C Kent, Jagjit Nanda, Ilia N Ivanov
Understanding of structural, electrical and gravimetric peculiarities of water vapor interaction with ion-intercalated MXenes led to design of a multimodal humidity sensor. Neutron scattering coupled to molecular dynamics and ab initio calculations showed that a small amount of hydration results in a significant increase in the spacing between MXene layers in the presence of K and Mg intercalants between the layers. Films of K and Mg-intercalated MXenes exhibited relative humidity detection thresholds of ~0...
October 11, 2017: ACS Nano
Gannon P Connor, Nicholas Lease, Andrea Casuras, Alan S Goldman, Patrick L Holland, James M Mayer
Protonation and reduction of pincer-ligated Rh- and Ir-N2 complexes have been studied by NMR spectroscopy and cyclic voltammetry to assess the capability of these complexes to activate or reduce N2. Protonation, which is a prerequisite to electrochemical reduction, results in a cationic metal-hydride that loses N2 under an atmosphere of Ar. Reduction of the metal-hydride results in fast disproportionation of an unobserved transient Ir(2+) species. These studies suggest that the regioselectivity of initial protonation is a strong determinant for the ability of a system to facilitate the reduction of N2...
October 11, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
Feng Gao, Yan Gao, Xue Chen, Jie Qian, Jie Zhang
OBJECTIVE: To investigate the differences in the results of esophageal function tests for functional heartburn (FH) and reflux hypersensitivity (RH). METHODS: Patients with FH and RH and healthy volunteers (HVs) from the Department of Gastroenterology, Beijing Anzhen Hospital and Beijing Chao-Yang hospital, who underwent high-resolution manometry and impedance (HRIM), and 24-hour multichannel intraluminal impedance and pH recording (MII/pH) between 2014 and 2016, were enrolled in this study...
2017: Gastroenterology Research and Practice
Sadaaki Kanayama, Takashi Kaito, Kazuma Kitaguchi, Hiroyuki Ishiguro, Kunihiko Hashimoto, Ryota Chijimatsu, Satoru Otsuru, Shota Takenaka, Takahiro Makino, Yusuke Sakai, Akira Myoui, Hideki Yoshikawa
STUDY DESIGN: In vitro and in vivo assessment of osteogenic effect by prostacyclin agonist (ONO-1301) OBJECTIVE.: To investigate the effects of ONO-1301 on in vitro osteoblastic differentiation and in vivo bone formation induced by bone morphogenetic protein (BMP). SUMMARY OF BACKGROUND DATA: Among prostaglandins (PGs), PGE2 is the most abundant in bone tissue and its effects on bone formation have been well studied. PGI2 (prostacyclin) is the second most abundant PG in bone tissue and plays important roles in hemodynamics...
October 9, 2017: Spine
Basar Caglar, J W Hans Niemantsverdriet, C J Kees-Jan Weststrate
The adsorption and decomposition of acetaldehyde and acetic acid were studied on Rh(100) to gain insight into the interaction of aldehyde and carboxyl groups of biomass-derived molecules with the surface. Temperature programmed reaction spectroscopy (TPRS) was used to monitor gaseous reaction products, whereas Reflection absorption infrared spectroscopy (RAIRS) was used to determine the nature of surface intermediates and reaction paths. The role of adsorbate interactions in oxygenate decomposition chemistry by varying the surface coverage...
October 10, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
Xuehong Wang, Yulan Li, Minglin Lin, Junfei Jin, Zhaoquan Huang
Rhodium (II) complex with 2-benzoylpyridine (Rh(L)2Cl2) is a new, synthetic, active metal-complex, which is produced by the reaction of 2-benzoylpyridine (L) with rhodium chloride hydrate (RhCl3·nH2O). The crystal structure was determined by X-ray diffraction which is mono-nuclear. In order to explore the biological properties of the novel complex, a series of studies were performed. The results showed that Rh(L)2Cl2 had the anti-tumor activity in HepG2 and other cell lines and has been shown to induce G1 cell cycle arrest and apoptosis in HepG2 cells...
October 9, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
Ji Hyun Lee, Il Je Yu
Exposure to the humidifier disinfectant, polyhexamethylene guanidine phosphate (PHMG), in mists generated from ultrasonic humidifiers was studied in a simulation chamber and apartment rooms. PHMG is suspected as a causative agent of lung disease in Korea residences. In the simulation-chamber study, the amount of disinfectant discharged from three different ultrasonic humidifiers was measured. Mists generated at 1, 2, and 4 times the recommended amount of disinfectant were sampled with an impinger, and the effect of relative humidity (RH) on airborne disinfectant concentration was studied by changing RH from 60%-70% to 90%-100%...
January 1, 2017: Toxicology and Industrial Health
Long Luo, Janis Timoshenko, Aliya S Lapp, Anatoly I Frenkel, Richard M Crooks
We report the structural characterization of 1-2 nm Rh and RhAu alloy dendrimer-encapsulated nanoparticles (DENs) prepared by chemical reduction with NaBH4. In contrast to previously reported results, in situ and ex situ X-ray absorption spectroscopic experiments indicate that only a fraction of the Rh(3+) present in the precursors are reduced by NaBH4. Additional structural analysis of RhAu alloy DENs using extended X-ray absorption fine structure spectroscopy leads to a model in which there is significant segregation of Rh and Au within the nanoparticles...
October 9, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
Hyunseok Kim, Sanghyuck Kim, Jiyeon Kim, Jeong-Yu Son, Yonghyeon Baek, Kyusik Um, Phil Ho Lee
An efficient, one-pot synthetic method for producing functionalized indolizine derivatives was developed via a Rh-catalyzed [2 + 1]-cyclopropanation, Pd-catalyzed ring expansion, and subsequent oxidation using manganese dioxide from pyridotriazoles and 1,3-dienes.
October 9, 2017: Organic Letters
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