A hammerhead ribozyme selects mechanically stable conformations for catalysis against viral RNA by Man Lu, Zhiqiang Cao, Luoan Xiong, Hongying Deng, Kangkang Ma, Ning Liu, Yanding Qin, Shen-Bo Chen, Jun-Hu Chen, Yao Li, Yijin Liu, Zhongbo Yu

“…We identify a conformational set containing five mechanical conformers of the mini ribozyme, where magnesium ions select the active one. Our results are supported by molecular dynamics simulations. …”
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Nutrient Stimulation of Indigenous Microorganisms for Oil-in-Water Emulsion in a Medium Temperature Petroleum Reservoir with Ca2+-Rich Brine by Guoxin Shi, Yuanyuan Jia, Lei Bai, Guoqiang Li, Xiaoli Liu, Meichen Liu, Xuecheng Dai, Xuefeng Tian, Hongbo Wang, Ting Ma

“…One of the challenges indigenous microbial enhanced oil recovery (MEOR) is facing is the high percentage of divalent ions, which obstruct the growth and metabolism of microorganisms and destabilize the oil-in-water (o/w) emulsion. …”
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Mössbauer, XRD, and Complex Thermal Analysis of the Hydration of Cement with Fly Ash by Vili Lilkov, Ognyan Petrov, Yana Tzvetanova, Plamen Savov, Milen Kadiyski

“…Iron in cement is present as Fe3+-ions and occupies two octahedral positions, with close isomer shifts and quadrupole splittings. …”
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NMR study of a gel layer formed on an irradiated Na-aluminoborosilicate glass during aqueous alteration by Sathya Narayanasamy, Thibault Charpentier, Amreen Jan, Mélanie Moskura, Matilde Benassi, Jean-Marc Delaye, Stéphane Gin

“…Abstract Simplified borosilicate glass powders were irradiated by 952 MeV 136Xe ions and then altered in a solution at a high S/V ratio at pH 9 and 90 °C for 33 days. …”
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Diagnostic uncertainty in primary aldosteronism by Marković Bojan, Stojković Mirjana, Janić Tamara, Babić Jovana, Đurković Ivana, Joksimović Nata, Nedeljković-Beleslin Biljana, Ćirić Jasmina, Žarković Miloš

“…Its main mechanism of action involves the reabsorption of sodium along with the secretion of potassium and hydrogen ions. It is the final hormonal signal in the renin-angiotensin-aldosterone system, which participates in the regulation of circulating volume and systemic vascular resistance. …”
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Biophysical and spectroscopical insights into structural modulation of species in the aggregation pathway of superoxide dismutase 1 by Vijay Raj Tomar, Shilpa Sharma, Soumik Siddhanta, Shashank Deep

“…Therefore, we probed the aggregation using ThT fluorescence, size-exclusion chromatography, and surface-enhanced Raman spectroscopy (SERS). The removal of metal ions and disulfide bonds resulted in the dimers rapidly first converting to an extended monomers then coming together slowly to form non-native dimers. …”
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The glycerol stabilized calcium phosphate cluster for rapid remineralization of tooth enamel by a water-triggered transformation by Nan Luo, Bing-Qiang Lu, Yu-Wei Deng, Hua Zeng, Yu Zhang, Jing-Yu Zhan, Xiao-Chen Xu, Gui-Zhi Cao, Jin Wen, Zhiyuan Zhang, Xi-Ping Feng, Xinquan Jiang, Feng Chen, Xi Chen

“…Here, by dissolving the ions of calcium and phosphate in glycerol-dominant solvents, we obtain the calcium phosphate clusters (1–2 nm), which are stabilized by glycerol (with high viscosity and affinity to clusters), but can perform a fast enamel repair via the water-triggered transformation in both static and dynamic environments. …”
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Magnetic Property and Therapeutic Effect of a New Co(II) Complex on Liver Cancer by Regulating the Expression of miRNA31 by Zhenshan Guo, Jun Zhen, Zhoujia Yao, Yemeng Wang, Chenlu Jin

“…The analysis of single X-ray diffraction indicated that the H2TTHA2- ligand μ5-bridges connected the Co(II) ions into a two-dimensional layered architecture. …”
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Periodic splay Fréedericksz transitions in a ferroelectric nematic by Bijaya Basnet, Sathyanarayana Paladugu, Oleksandr Kurochkin, Oleksandr Buluy, Natalie Aryasova, Vassili G. Nazarenko, Sergij V. Shiyanovskii, Oleg D. Lavrentovich

“…The stationary bound charge is reduced by a geometrical “splay cancellation” mechanism that does not require free ions: the charge created by splay in one plane is reduced by splay of an opposite sign in the orthogonal plane.…”
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Biosynthesis of α MnO2 nanorods using Coleus amboinicus leaf extract and its adsorption performance of Pb(II) from aqueous solutions. by Rejani Padmavathiamma, Rani Pillai

“…In the present study, nanostructured manganese oxide was used for the removal of the heavy metal ions from aqueous solutions by a batch adsorption method and have been modelled using classical Langmuir and Freundlich adsorption isotherms. we have successfully synthesized an efficient adsorbent through a cost-effective and eco-friendly method. …”
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Dimuon and ditau production in photon-photon collisions at next-to-leading order in QED by Hua-Sheng Shao, David d’Enterria

“…At the LHC, the calculations obtained with the charge form factor for protons and lead ions including the NLO QED corrections improve the data-theory agreement for all measured differential distributions, and prove an indispensable ingredient for the extraction of precision quantities in photon-photon processes, such as the anomalous magnetic moment of the tau lepton.…”
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Pelletization of fly ash for utilization in dynamic sorption processes by Vlahović Milica, Djordjević Nataša, Vušović Nenad, Vlahović Milan, Avramović Jelena, Veljković Nikola, Savić Aleksandar

“…Its alumino-silicate composition, porous structure, large specific surface area, and sorption activity make fly ash an efficient and low-cost sorbent for removing metal ions from acidic mine waters but only in discontinuous (static) systems. …”
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Research Progress in Raw Starch Degrading Enzymes by NING Ke, ZHANG Haoran, ZHAO Kai

“…Thereafter, this review outlines the sources of RSDE and analyzes the factors affecting RSDE activity, such as amylase action conditions, metal ions, and starch granule-associate protein. Finally, it summarizes the application of RSDE in the starch industry. …”
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Intestinal Permeability Assays: a Review by A. A. Iakupova, S. R. Abdulkhakov, R. K. Zalyalov, A. G. Safin, R. A. Abdulkhakov

“…The intestinal barrier integrity and permeability assays differ by the application setting (in vivo or ex vivo), subject (human or animal), marker molecules used to assess permeability (ions, various size carbohydrates, macromolecules, antigens, bacterial products and bacteria), biomaterial for the marker concentration assays (peripheral blood, portal venous blood, urine, stool). …”
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Regulation of the sintering trajectory of Ho,Pr:Y2O3 ceramics for 2.9 μm mid-infrared lasers by atmospheric sintering by Qing Li, Fei Liang, Jun Wang, Yan Ling Xue, Jie Ma, Peng Liu, Shiyu Sun, Zhan Hui, Jian Zhang, Changhua Zhang, Lili Hu, Haohai Yu, Huaijin Zhang, Dingyuan Tang

“…The codoping of Pr3+ as deactivating ions effectively depopulated the lower energy level 5I7 during the Ho3+:5I6 → 5I7 transition, thereby making the Ho,Pr:Y2O3 ceramics more conducive to promoting population inversion in the 2.9 μm laser wavelength range.…”
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Bacterial Exopolysaccharides as Reducing and/or Stabilizing Agents during Synthesis of Metal Nanoparticles with Biomedical Applications by Carlos Enrique Escárcega-González, Javier A. Garza-Cervantes, Augusto Vázquez-Rodríguez, José Rubén Morones-Ramírez

“…In this context, bacterial EPSs have been explored as agents to aid in a greener production of a myriad of metal nanoparticles, since they have the ability to reduce metal ions to form nanoparticles and stabilize them acting as capping agents. …”
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Solvent extraction of uranium from an acidic medium for the front-end of nuclear fuel cycle: from mechanisms understanding to innovative process design by Giusti, Fabrice, Guerinoni, Elise, Lemire, David, Thimotée, Marine, Arrachart, Guilhem, Dourdain, Sandrine, Pellet-Rostaing, Stéphane

“…Despite the fact that methods for uranium extraction from an acidic medium (sulfuric, phosphoric or nitric) are relatively robust processes, the search for more efficient systems in terms of extraction efficiency and selectivity with respect to competitor ions remains relevant. To address this challenge, researchers have developed a wide range of new extracting molecular agents that allow efficient and selective liquid–liquid extraction of the target metal. …”
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Raman Spectra of PbTe- and GeTe-Based Monocrystalline Epitaxial Layers by N. Romcevic, B. Hadzic, P. Dziawa, T. Story, W. D. Dobrowolski, M. Romcevic

“…An improvement in the quality of thin films due to doping with Eu ions was also registered.…”
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Kinetic Modeling for Microwave-Enhanced Degradation of Methylene Blue Using Manganese Oxide by Wen-Hui Kuan, Chun-Yuan Chen, Ching-Yao Hu, Yu-Min Tzou

“…However, a higher degradation rate of MB was available under the MW-enhanced process, which implies that the “athermal effect” of MW might be of more benefit for the generation of electrophilic oxygen ions (, , and ) to degrade MB. The results showed that the degradation percentage of MB could reach 100%, corresponding to 92% total organic carbon (TOC) removal under microwave irradiation at pH 7.20 for 10 min.…”
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Sensitivity of Nafion Films to Organic Substances, Especially Ketones by Alfredo Marquez Lucero, Miguel Orozco, Nancy Navarro, Virginia Collins

“…The main result of the present work is that Nafion can protonate gaseous ions from organic solvents, such as acetone and similar substances, which modify its electrical properties, presenting a differentiated behavior according to the chemical nature of these substances, which could lead to their identification, designing an electrical nose, because each behavior is a fingerprint of the substance to detect. …”
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