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https://www.readbyqxmd.com/read/29244765/new-insights-into-solid-form-stability-and-hydrate-formation-o-phenanthroline-hcl-and-neocuproine-hcl
#1
Doris E Braun, Katharina Raabe, Anna Schneeberger, Volker Kahlenberg, Ulrich J Griesser
The moisture- and temperature dependent stabilities and interrelation pathways of the practically relevant solid forms of o-phenanthroline HCl (1) and neocuproine HCl (2) were investigated using thermal analytical techniques (HSM, DSC and TGA) and gravimetric moisture sorption/desorption studies. The experimental stability data were correlated with the structural changes observed upon dehydration and the pairwise interaction and lattice energies calculated. For 1 the monohydrate was identified as the only stable form under conditions of RH typically found during production and storage, but at RH values >80% deliquescence occurs...
December 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29244517/pyridinium-salt-forming-rh-iii-catalyzed-annulation-reaction-of-secondary-allylamines-with-internal-alkynes-and-its-application-to-surface-modification-of-a-mesoporous-material
#2
Ye Ri Han, Su-Hyang Shim, Dong-Su Kim, Chul-Ho Jun
A Rh(III)-catalyzed C-H activation reaction has been developed for the preparation of pyridinium salts from secondary allylamines and internal alkynes. The pyridinium salts formed by this N-annulation reaction have interesting fluorescence properties. This protocol has been applied to the surface modification of mesoporous silica materials to generate functionalized silica that can be used for the detection of nitrobenzene.
December 15, 2017: Organic Letters
https://www.readbyqxmd.com/read/29244085/effects-of-cold-exposure-on-physiology-meat-quality-and-behavior-of-turkey-hens-and-toms-crated-at-transport-density
#3
Z A Henrikson, C J Vermette, K Schwean-Lardner, T G Crowe
The impact of cold exposure while crated at a density characteristic of transport (83 kg/m2) was assessed in 12-wk-old turkey hens and 16-wk-old toms. Turkeys (72 toms, 72 hens) were randomly divided into 3 male and 3 female groups: 2 moderate 20°C groups with either 30% or 80% RH and a cold group exposed to -18°C, with uncontrolled, high RH. Groups of 8 birds (one replicate unit) were observed in a climate-controlled chamber for 8 h prior to slaughter. Core body temperature (CBT), live shrink, heterophil-lymphocyte ratio (HLR), and change in blood glucose levels were assessed; meat quality measures included thigh and breast muscle pH and L*, a*, and b* color values...
December 13, 2017: Poultry Science
https://www.readbyqxmd.com/read/29243439/-identification-of-saponins-from-panax-notoginseng-in-metabolites-of-rats
#4
Wen-Wen Shen, Yin Zhang, Shou-Bei Qiu, Fen-Xia Zhu, Xiao-Bin Jia, Dao-Quan Tang, Bin Chen
UPLC-QTOF-MS/MS was used to identify metabolites in rat blood, urine and feces after the administration of n-butanol extract derived from steamed notoginseng. The metabolic process of saponins came from steamed notoginseng was analyzed. The metabolites were processed by PeakView software, and identified according to the structural characteristics of prototype compounds and the accurate qualitative and quantitative changes of common metabolic pathways. Four saponins metabolites were identified based on MS/MS information of metabolites, namely ginsenoside Rh₄, Rk₃, Rk₁, Rg₅,and their 15 metabolites were verified...
October 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29243119/action-observation-or-imitation-of-virtual-hand-movement-affect-differently-regions-of-the-mirror-neuron-system-and-the-default-mode-network
#5
Nabila Brihmat, Mohamed Tarri, Yann Quidé, Ketty Anglio, Bernard Pavard, Evelyne Castel-Lacanal, David Gasq, Xavier De Boissezon, Philippe Marque, Isabelle Loubinoux
Virtual reality (VR)-based paradigms use visual stimuli that can modulate visuo-motor networks leading to the stimulation of brain circuits. The aims of this study were to compare the changes in blood-oxygenation level dependent (BOLD) signal when watching and imitating moving real (RH) and virtual hands (VH) in 11 healthy participants (HP). No differences were found between the observation of RH or VH making this VR-based experiment a promising tool for rehabilitation protocols. VH-imitation involved more the ventral premotor cortex (vPMC) as part of the mirror neuron system (MNS) compared to execution and VH-observation conditions...
December 14, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29242958/impact-of-radical-hysterectomy-on-the-transobturator-sling-pathway-a-retrospective-three-dimensional-magnetic-resonance-imaging-study
#6
Jinyang Chen, Chunlin Chen, Yige Li, Lan Chen, Juan Xu, Ping Liu
INTRODUCTION AND HYPOTHESIS: Morphological and functional anomalies of the urethra may cause stress urinary incontinence after radical hysterectomy (RH). We introduce a novel three-dimensional (3D) magnetic resonance imaging (MRI) technique to assess the impact of RH on the transobturator sling pathway. METHODS: 3D-MRI reconstruction models were retrospectively developed for the measurement of various parameters before and after RH, including puncture angle, orientation and distance from the midurethral puncture site to the obturator membrane (DUO), in 31 patients with cervical cancer...
December 14, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/29242569/ecosystem-respiration-and-its-components-in-a-rainfed-spring-maize-cropland-in-the-loess-plateau-china
#7
Xiang Gao, Xurong Mei, Fengxue Gu, Weiping Hao, Haoru Li, Daozhi Gong
We estimated ecosystem respiration (Re) and its components in a rainfed spring maize field in the Loess Plateau, China, during the growing seasons of 2012, 2013, and 2014 using measurements of eddy covariance and soil respiration (Rs). The multi-factor equation, which included photosynthetic active radiation, 5-cm soil temperature, 10-cm soil water content, and green leaf area index (GLAI), had goodness-of-fit values of between 0.81 and 0.94 for Re, autotrophic respiration (Ra), and above-ground autotrophic respiration (Raa), and goodness-of-fit values of between 0...
December 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29240918/evaluation-of-the-natural-zeolite-lethal-effects-on-adults-of-the-bean-weevil-under-different-temperatures-and-relative-humidity-regimes
#8
George D Floros, Anastasia I Kokkari, Nikolaos A Kouloussis, Nikolaos A Kantiranis, Petros Damos, Anestis A Filippidis, Dimitris S Koveos
We studied the insecticidal activity of different concentrations of very high quality natural zeolites (zeolitic rock containing 92 wt% clinoptilolite) applied on dry beans. The test species was adult bean weevils Acanthoscelides obtectus (Say; Coleoptera: Bruchidae), and the variables included different temperatures and humidity regimes. At certain natural zeolite concentrations the adult mortality approached 100% within the first day of exposure. The lethal natural zeolite concentration for 50% adult mortality (LD50) was 1...
December 12, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29239449/synthesis-of-spirocyclic-orthoesters-by-anomalous-rhodium-ii-catalysed-intramolecular-c-h-insertions
#9
Fanny J Lombard, Romain J Lepage, Brett D Schwartz, Ryne C Johnston, Peter C Healy, Elizabeth H Krenske, Mark J Coster
A tetrahydropyranyl acetal bearing a proximal phenyl diazoketone substituent underwent Rh(ii)-catalysed C-H insertion via an 'anomalous' C-O bond-forming, rather than C-C bond-forming, transformation, giving spirocyclic orthoesters. Density functional theory calculations with M06 show that the formation of these anomalous products involves hydride transfer to the rhodium carbene, giving an intermediate zwitterion which undergoes C-O bond formation in preference to C-C bond formation.
December 14, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29238974/a-randomized-phase-iii-trial-of-neoadjuvant-recombinant-human-endostatin-docetaxel-and-epirubicin-as-first-line-therapy-for-patients-with-breast-cancer-cbcrt01
#10
Jianghao Chen, Qing Yao, Meiling Huang, Bo Wang, Juliang Zhang, Ting Wang, Yu Ming, Xiaodong Zhou, Qianxin Jia, Yi Huan, Jing Wang, Ling Wang
To further assess the efficacy and safety of recombinant human endostatin (rh-endostatin), a phase III, multicenter, prospective, randomized, controlled clinical trial was conducted. Patients to be treated with neoadjuvant docetaxel and epirubicin (DE) or DE plus rh-endostatin (DEE) were eligible for this trial. The primary endpoint was clinical/pathological response. Secondary endpoints included adverse events and quality of life (QOL). Finally, 803 patients were enrolled and randomly assigned to receive DE (n = 402) or DEE (n = 401) regimen...
December 14, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29238438/aqueous-heterogeneous-parahydrogen-induced-15n-polarization
#11
Liana B Bales, Kirill V Kovtunov, Danila A Barskiy, Roman V Shchepin, Aaron M Coffey, Larisa M Kovtunova, Andrey V Bukhtiyarov, Matthew A Feldman, Valerii I Bukhtiyarov, Eduard Y Chekmenev, Igor V Koptyug, Boyd M Goodson
The successful transfer of parahydrogen-induced polarization to 15N spins using heterogeneous catalysts in aqueous solutions was demonstrated. Hydrogenation of a synthesized unsaturated 15N-labeled precursor (neurine) with parahydrogen (p-H2) over Rh/TiO2 heterogeneous catalysts yielded a hyperpolarized structural analog of choline. As a result, 15N polarization enhancements of over two orders of magnitude were achieved for the 15N-ethyl trimethyl ammonium ion product in deuterated water at elevated temperatures...
July 20, 2017: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
https://www.readbyqxmd.com/read/29238327/transmission-of-airborne-bacteria-across-built-environments-and-its-measurement-standards-a-review
#12
REVIEW
So Fujiyoshi, Daisuke Tanaka, Fumito Maruyama
Human health is influenced by various factors including microorganisms present in built environments where people spend most of their lives (approximately 90%). It is therefore necessary to monitor and control indoor airborne microbes for occupational safety and public health. Most studies concerning airborne microorganisms have focused on fungi, with scant data available concerning bacteria. The present review considers papers published from 2010 to 2017 approximately and factors affecting properties of indoor airborne bacteria (communities and concentration) with respect to temporal perspective and to multiscale interaction viewpoint...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29235709/dynamic-environments-of-fungus-farming-termite-mounds-exert-growth-modulating-effects-on-fungal-crop-parasites
#13
Lakshya Katariya, Priya B Ramesh, Renee M Borges
This study investigated for the first time the impact of the internal mound environment of fungus-growing termites on the growth of fungal crop parasites. Mounds of the termite Odontotermes obesus acted as 1) temperature and relative humidity (RH) "stabilisers" showing dampened daily variation, and 2) "extreme environments" exhibiting elevated RH and CO2 levels, compared to the outside. Yet, internal temperatures exhibited seasonal dynamics as did daily and seasonal CO2 levels. During in situ experiments under termite-excluded conditions within the mound, the growth of the crop parasite Pseudoxylaria was greater inside than outside the mound, i...
December 13, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/29232516/highly-enantioselective-synthesis-of-propargyl-amides-through-rh-catalyzed-asymmetric-hydroalkynylation-of-enamides-scope-mechanism-and-origin-of-selectivity
#14
Xiao-Yan Bai, Wen-Wen Zhang, Qian Li, Bi-Jie Li
Chiral propargyl amides are particularly useful structural units in organic synthesis. The enantioselective synthesis of propargyl amide is highly desirable. Conventional approach involves the use of stoichiometric amount of metal reagent or chiral auxiliary. In comparison, direct alkynylation with terminal alkyne is attractive because it avoids the use of stoichiometric organometallic reagent. The asymmetric coupling of aldehyde, amine and alkyne (A3-coupling) provide an efficient method for the synthesis of N-alkyl and N-aryl substituted propargyl amines, but this strategy is not amenable for the direct enantioselective synthesis of propargyl amide...
December 12, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29231932/rhodium-mediated-asymmetric-transfer-hydrogenation-a-diastereo-and-enantioselective-synthesis-of-syn-%C3%AE-amido-%C3%AE-hydroxy-esters
#15
Long-Sheng Zheng, Charlène Férard, Phannarath Phansavath, Virginie Ratovelomanana-Vidal
The preparation of syn α-benzoylamido β-hydroxy esters through asymmetric transfer hydrogenation (ATH) with a tethered Rh(iii)-DPEN complex via dynamic kinetic resolution (DKR) has been developed for the first time starting from α-benzoylamido β-keto esters. A variety of α-benzoylamido β-keto esters were converted under mild conditions into the corresponding syn α-benzoylamino β-hydroxy esters with high yields (up to 98%) and diastereomeric ratios (up to >99 : 1 dr) as well as excellent enantioselectivities (up to >99% ee)...
December 12, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29231726/activation-of-small-molecules-by-the-metal-amido-bond-of-rhodium-iii-and-iridium-iii-%C3%AE-5-c5me5-m-aminopyridinate-complexes
#16
Ana Zamorano, Nuria Rendón, Joaquín López-Serrano, Eleuterio Álvarez, Ernesto Carmona
We report the synthesis and structural characterization of five-coordinate complexes of rhodium and iridium of the type [(η5-C5Me5)M(N^N)]+ (3-M+), where N^N represents the aminopyridinate ligand derived from 2-NH(Ph)-6-(Xyl)C5H3N (Xyl = 2,6-Me2C6H3). The two complexes were isolated as salts of the BArF anion (BArF = B[3,5-(CF3)2C6H3]4). The M-Namido bond of complexes 3-M+ readily activated CO, C2H4, and H2. Thus, compounds 3-M+ reacted with CO under ambient conditions, but whereas for 3-Rh+, CO migratory insertion was fast, yielding a carbamoyl carbonyl species, 4-Rh+, the stronger Ir-Namido bond of complex 3-Ir+ caused the reaction to stop at the CO coordination stage...
December 12, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29226669/enhanced-oxidation-resistant-cu-ni-core-shell-nanoparticles-for-printed-flexible-electrodes
#17
Tae Gon Kim, Hye Jin Park, Kyoohee Woo, Sunho Jeong, Youngmin Choi, Su Yeon Lee
Conductive metallic nanomaterials applicable to low-cost and scalable methods have attracted great attention. Among these, Cu-based electrodes appear promising for flexible and stretchable electronic devices. However, Cu nanoparticle (NP)-based electrodes are inherently sensitive to oxygen and moisture, which hinder their practical applications. In this work, fabrication and application of highly conductive, robust, flexible, and oxidation-resistant Cu-Ni core-shell NP-based electrodes have been reported. Cu@Ni core-shell NPs with a tunable Ni shell thickness were synthesized by varying the Cu/Ni molar ratios in the precursor solution...
December 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29224338/dynamic-behavior-of-rh-species-of-rh-al2o3-model-catalyst-during-three-way-catalytic-reaction-an-operando-xas-study
#18
Hiroyuki Asakura, Saburo Hosokawa, Toshiaki Ina, Kazuo Kato, Kiyofumi Nitta, Kei Uera, Tomoya Uruga, Hiroki Miura, Tetsuya Shishido, Jun-Ya Ohyama, Atsushi Satsuma, Katsutoshi Sato, Akira Yamamoto, Satoshi Hinokuma, Hiroshi Yoshida, Masato Machida, Seiji Yamazoe, Tatsuya Tsukuda, Kentaro Teramura, Tsunehiro Tanaka
The dynamic behavior of Rh species in 1 wt% Rh/Al2O3 catalyst during the three-way catalytic reaction was examined using a micro gas chromatograph, a NOx meter, a quadrupole mass spectrometer, and time-resolved quick X-ray absorption spectroscopy (XAS) measurements at a public beamline for XAS, BL01B1 at SPring-8, operando. The combined data suggest different surface rearrangement behavior, random reduction processes, and autocatalytic oxidation processes of Rh species when the gas is switched from a reductive to an oxidative atmosphere and vice versa...
December 11, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29223564/indocyanine-green-assisted-parametrial-dissection-during-type-c1-radical-hysterectomy-after-sentinel-lymph-node-biopsy-in-early-stage-cervical-cancer
#19
Nicolò Bizzarri, Valentina Ghirardi, Ali Kucukmetin
OBJECTIVES: The standard treatment for FIGO stage 1B1 cervical cancer is radical hysterectomy (RH) [1]. Indocyanine-green (ICG) is a drug injected within the cervical stroma to detect the sentinel lymph node (SLN) in cervical cancer [2,3]. ICG travels through the lymphatic channels in the lateral parametrium, which results enhanced with green, before reaching the SLNs. This could help identifying the surgical landmarks. The aim of this video is to propose a new approach to perform parametrial dissection as part of RH under the guidance of ICG...
December 6, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/29222672/morphological-alterations-in-the-position-of-the-mandibular-foramen-in-dentate-and-edentate-mandibles
#20
Niki Matveeva, Lidija Popovska, Biljana Evrosimovska, Elizabeta Chadikovska, Julijana Nikolovska
The technique of inferior alveolar nerve (IAN) block must be based on precise anatomical knowledge regarding the correct position of the mandibular foramen (MF). The aim of the investigation reported here was to determine the anatomic and topographic localization of the MF according to mandibular ramus anatomic landmarks and to identify morphological alterations in the position of the MF and size and shape of the ramus in terms of the impact of tooth socket loss in the molar and premolar region. Seventy-three dry human adult mandibles were divided into two groups according to dental status...
December 8, 2017: Anatomical Science International
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