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Rh system

S Gu, H X Wang, C Y Yang, X F Yang, Y Lin, Y Zhong, J P He, Y J Wang
Objective: To summarize the clinical features of 7 rare cases of hemolytic disease of newborn (HDN), and to improve the understanding of rare HDN. Methods: Data of clinical information, laboratory findings, treatments and outcomes were collected and analyzed for four cases with HDN due to anti-M, two cases due to anti-Kidd, and one case due to anti-Duffy. All of them were admitted to the Department of Neonatology, Beijing Children's Hospital Affiliated to Capital Medial University from July 2007 to June 2017...
May 2, 2018: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
Titel Jurca, Theresa Dellermann, Naomi E Stubbs, Diego A Resendiz-Lara, George R Whittell, Ian Manners
Precatalysts active for the dehydropolymerisation of primary amine-boranes are generally based on mid or late transition metal. We have found that the activity of the precatalyst system formed from CpR 2 TiCl2 and 2 n BuLi towards the dehydrogenation of the secondary amine-borane Me2 NH·BH3 , to yield the cyclic diborazane [Me2 N-BH2 ]2 , increases dramatically with increasing electron-donating character of the cyclopentadienyl rings (CpR ). Application of the most active precatalyst system (CpR = η-C5 Me5 ) to the primary amine-borane MeNH2 ·BH3 enabled the first synthesis of high molar mass poly( N -methylaminoborane), [MeNH-BH2 ] n , the BN analogue of polypropylene, by an early transition metal such as catalyst...
April 7, 2018: Chemical Science
William J Lane, Connie M Westhoff, Nicholas S Gleadall, Maria Aguad, Robin Smeland-Wagman, Sunitha Vege, Daimon P Simmons, Helen H Mah, Matthew S Lebo, Klaudia Walter, Nicole Soranzo, Emanuele Di Angelantonio, John Danesh, David J Roberts, Nick A Watkins, Willem H Ouwehand, Adam S Butterworth, Richard M Kaufman, Heidi L Rehm, Leslie E Silberstein, Robert C Green
BACKGROUND: There are more than 300 known red blood cell (RBC) antigens and 33 platelet antigens that differ between individuals. Sensitisation to antigens is a serious complication that can occur in prenatal medicine and after blood transfusion, particularly for patients who require multiple transfusions. Although pre-transfusion compatibility testing largely relies on serological methods, reagents are not available for many antigens. Methods based on single-nucleotide polymorphism (SNP) arrays have been used, but typing for ABO and Rh-the most important blood groups-cannot be done with SNP typing alone...
May 17, 2018: Lancet Haematology
Ligang Luo, Jing Yang, Guodong Yao, Fangming Jin
Catalytic depolymerization of kraft lignin was successfully carried out in isopropanol/water mixture system over Rh/La2 O3 /CeO2 -ZrO2 catalyst at 373 °C for 2 h with Fe as reductant. The selectivity of in-situ H2 was increasing from 67 wt% to 98 wt% by changing the proportion of isopropanol and water with metal Fe. A one-to-one correspondence was established between liquid products distribution and H2 . It was an efficient method for predicting the composition of the liquid oil by H2 selectivity detection or converting kraft lignin to desirable liquid products optionally, which administered to reduce the dependence on the specific catalysts...
March 15, 2018: Bioresource Technology
Saman Fatima, Zeenat Iqbal, A K Panda, M Samim, Sushama Talegaonkar, Farhan Jalees Ahmad
Amikacin (A), a water soluble aminoglycoside antibiotic is commercially available for intravenous administration only. Present investigation is aimed at the development of poly-lactic-co-glycolic acid (PLGA) nanoparticles (A-NPs).1 for oral permeability enhancement of amikacin. The pharmaceutical attributes of the A-NPs revealed particle size, 260.3 ± 2.05 nm, zeta potential, -12.9 ± 1.12 mV and drug content, 40.10 ± 1.87 μg/mg with spherical shape and smooth surface. In vitro antibacterial studies showed that the A-NPs were active against P...
May 16, 2018: Colloids and Surfaces. B, Biointerfaces
Sameer Shakeel Ansari, Imtiyaz Yousuf, Farukh Arjmand, Mohammad Khursheed Siddiqi, Saeeda Naqvi
The intermolecular interaction of flufenamic acid (Hfluf) with two model proteins i.e., hemoglobin and lysozyme was explored using fluorescence, UV-vis, circular dichroism, DLS, and molecular docking techniques. The corroborative spectroscopic techniques suggested efficient binding of Hfluf to both the proteins. The S-V plot in Hb-Hfluf system showed positive deviation highlighting the presence of both static and dynamic quenching. Hence, ground state complex model and sphere of action quenching model were used for the study...
May 16, 2018: International Journal of Biological Macromolecules
Masao Gen, Dandan Huang, Chak Keung Chan
Reactions between dissolved ammonia and carbonyls, which form light-absorbing species in atmospheric particles, can be accelerated by actively removing water from the reaction system. Here, we examine the effects of relative humidity (RH) on the reactive uptake of glyoxal (Gly) by aqueous particles of ammonium sulfate (AS), ammonium bisulfate, sodium sulfate, magnesium sulfate, ammonium nitrate (AN), and sodium nitrate. In-situ Raman analysis was used to quantify particle-phase Gly and a colored product, 2,2'-biimidazole (BI) as a function of uptake time...
May 18, 2018: Environmental Science & Technology
Shintaro Ida, Kenta Sato, Tetsuya Nagata, Hidehisa Hagiwara, Motonori Watanabe, Kim Namhoon, Yoshihito Shiota, Michio Koinuma, Sakae Takenaka, Elif Ertekin, Tatsumi Ishiihara
The hydrogen evolution reaction using semiconductor photocatalysts has been significantly improved by cocatalyst loading. However, there are still many speculations regarding the actual role of the cocatalyst. Here we report a photocatalytic hydrogen evolution reaction pathway on a cocatalyst site using TiO2 nanosheets doped with Rh at Ti sites as one-atom cocatalysts. A hydride species adsorbed on the one-atom Rh dopant cocatalyst site was confirmed experimentally as the intermediate state for hydrogen evolution, which was consistent with the results of density functional theory (DFT) calculations...
May 15, 2018: Angewandte Chemie
Katarzyna Hubkowska, Mariusz Łukaszewski, Michał Soszko, Urszula Koss, Bartosz Hamankiewicz, Andrzej Czerwiński
Pd-Ru, Pd-Rh, Pd-Pt-Ru, and Pd-Rh-Ru electrodes were prepared as thin layers by potentiostatic codeposition or chemical co-precipitation of metals from baths containing mixtures of chloride salts. The formation of substitutional solid solutions, with lattice parameters smaller than that of pure Pd, was confirmed by X-ray diffraction (XRD). The compositions at various levels of sample volume and thickness were analyzed by inductively coupled plasma atomic emission spectroscopy (ICP-AES), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), and also electrochemically by cyclic voltammetry (CV) in 0...
May 15, 2018: Materials
Jiajing Zhang, Wentao Zhang, Minghui Xu, Yang Zhang, Xuefeng Fu, Huayi Fang
It is of fundamental importance to transform carbon monoxide (CO) to petrochemical feedstocks and fine chemicals. Many strategies built on the activation of C≡O bond by π-back bonding from the transition metal center were developed during the past decades. Herein, a new CO activation method, in which the CO was converted to the active acyl-like metallo-radical [(por)Rh(CO)]• (por = porphyrin), was reported. The reactivity of [(por)Rh(CO)]• and other rhodium porphyrin compounds, such as (por)RhCHO and (por)RhC(O)NH n Pr, and corresponding mechanism studies were conducted experimentally and computationally, and inspired the design of a new conversion system featuring 100% atomic economy that promotes carbonylation of amines to formamides using porphyrin rhodium(II) metallo-radical...
May 11, 2018: Journal of the American Chemical Society
Hyeyoung Shin, Hai Xiao, William A Goddard
The oxygen evolution reaction (OER) is critical to efficient water splitting to produce the H2 fuel for sustainable energy production. Currently, the best non-noble metal OER electrocatalyst in base conditions is the Fe-doped NiOOH (Ni1-xFexOOH), with η=0.4, but much lower values are desired. We use density functional theory to determine the overall mechanism for the OER of Ni1-xFexOOH, concluding that promoting radical character on the metal-oxo bond is critical to efficient OER. Then we consider replacing Fe with 17 other transition metals of the Fe, Ru, and Os rows, where we find 3 new promising candidates: Co, Rh, and Ir, which we predict to have η=0...
May 11, 2018: Journal of the American Chemical Society
Vivek Dave, Renu Bala Yadav, Kriti Kushwaha, Sachdev Yadav, Swapnil Sharma, Udita Agrawal
Poly lactic acid is a biodegradable, biocompatible, and non-toxic polymer, widely used in many pharmaceutical preparations such as controlled release formulations, parenteral preparations, surgical treatment applications, and tissue engineering. In this study, we prepared lipid-polymer hybrid nanoparticles for topical and site targeting delivery of Norfloxacin by emulsification solvent evaporation method (ESE). The design of experiment (DOE) was done by using software to optimize the result, and then a surface plot was generated to compare with the practical results...
December 2017: Bioactive Materials
Venkateswaran Vivekananthan, Nagamalleswara Rao Alluri, Yuvasree Purusothaman, Arunkumar Chandrasekhar, Sophia Selvarajan, Sang-Jae Kim
In contrast with the conventional ceramic/oxide humidity sensors (HS), a self-powered piezoelectric biopolymer (SP-PB)-HS with reasonable sensitivity, reliability, non-toxic, and eco-friendly nature is highly desirable. A piezoelectric nanogenerator (PNG) driven biopolymer based HS provides a pathway towards a sustainable and greener environment in the field of smart sensors. For that, a piezoelectric collagen-nanofibrils (PCNF) biopolymer coated on to a cotton fabric has dual functionality (energy harvesting and sensor)...
May 10, 2018: ACS Applied Materials & Interfaces
Evans K Cheruiyot, Rawlynce C Bett, Joshua O Amimo, Fidalis D N Mujibi
It is well established that milk composition is affected by the breed and genotype of a cow. The present study investigated the relationship between the proportion of exotic genes and milk composition in Tanzanian crossbred dairy cows. Milk samples were collected from 209 animals kept under smallholder production systems in Rungwe and Lushoto districts of Tanzania. The milk samples were analyzed for the content of components including fat, protein, casein, lactose, solids-not-fat (SNF), and the total solids (TS) through infrared spectroscopy using Milko-Scan FT1 analyzer (Foss Electric, Denmark)...
2018: Frontiers in Genetics
Wei Yang, Xiangyang Lei, Haohao Hui, Qinghua Zhang, Xueran Deng
Moisture-resistant silicone coatings were prepared on the surface of potassium dihydrogen phosphate (KDP) crystal by means of spin-coating, in which hydrophobic-modified SiO₂ nanoparticles were embedded in a certain proportion. The refractive index of such coating can be tuned arbitrarily in the range of 1.21⁻1.44, which endows the KDP optical component with excellent transmission capability as well as the moisture proof effect. A dual-layer anti-reflective coating system was obtained by covering this silicone coating with a porous SiO₂ coating which is specially treated to enhance the moisture resistance...
May 7, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Edileuza Danieli da Silva, Martin Cancela, Karina Mariante Monteiro, Henrique Bunselmeyer Ferreira, Arnaldo Zaha
BACKGROUND: Cystic hydatid disease is a zoonosis caused by the larval stage (hydatid) of Echinococcus granulosus (Cestoda, Taeniidae). The hydatid develops in the viscera of intermediate host as a unilocular structure filled by the hydatid fluid, which contains parasitic excretory/secretory products. The lipoprotein Antigen B (AgB) is the major component of E. granulosus metacestode hydatid fluid. Functionally, AgB has been implicated in immunomodulation and lipid transport. However, the mechanisms underlying AgB functions are not completely known...
May 4, 2018: PLoS Neglected Tropical Diseases
Carlos Romero-Muñiz, Ana Martín-Recio, Pablo Pou, José M Gómez-Rodríguez, Rubén Pérez
The atomistic mechanisms involved in the oxygen (O) intercalation in the strongly interacting graphene (G) on Rh(111) system are characterized in a comprehensive experimental and theoretical study, combining scanning tunneling microscopy and density functional theory (DFT) calculations. Experimental evidence points out that the G areas located just above the metallic steps of the substrate are the active sites for initializing the intercalation process when some micro-etching points appear after molecular oxygen gas exposure...
May 3, 2018: Physical Chemistry Chemical Physics: PCCP
Li Tang, Yaoming Feng, Zengshan Xing, Zhe Chen, Jianhui Yu, Heyuan Guan, Huihui Lu, Junbin Fang, Yongchun Zhong
This paper presented a high-sensitivity humidity sensor comprised of a side-polished fiber with polymer nanostructure cladding, which was constructed by dehydrating dichromate gelatin film on the polished surface. Due to the intermodal interference of the core mode and cladding mode, two main transmission dips were observed at 1184.4 nm and 1325.6 nm. These two transmission dips showed significant sensitivity to humidity. The position of transmission dip at 1325.6 nm shifted 22 nm while the relative humidity (RH) changed from 30% RH to 50% RH...
April 1, 2018: Applied Optics
Järvi Järveoja, Mats B Nilsson, Michal Gažovič, Patrick M Crill, Matthias Peichl
The net ecosystem CO2 exchange (NEE) drives the carbon (C) sink-source strength of northern peatlands. Since NEE represents a balance between various production and respiration fluxes, accurate predictions of its response to global changes require an in depth understanding of these underlying processes. Currently, however, detailed information of the temporal dynamics as well as the separate biotic and abiotic controls of the NEE component fluxes is lacking in peatland ecosystems. In this study, we address this knowledge gap by using an automated chamber system established across natural and trenching-/vegetation removal plots to partition NEE into its production (i...
April 30, 2018: Global Change Biology
Seulki Kim, Sung Gu Han, Young Gook Koh, Hyunjung Lee, Wonmok Lee
We demonstrate a fast response colorimetric humidity sensor using a crosslinked poly(2-hydroxyethyl methacrylate) (PHEMA) in the form of inverse opal photonic gel (IOPG) soaked in 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM⁺][BF₄− ]), a non-volatile hydrophilic room temperature ionic liquid (IL). An evaporative colloidal assembly enabled the fabrication of highly crystalline opal template, and a subsequent photopolymerization of PHEMA followed by solvent-etching and final soaking in IL produced a humidity-responsive IOPG showing highly reflective structural color by Bragg diffraction...
April 27, 2018: Sensors
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