gebhart/patrepeval huggingface dataset:
Redox Sorption and Recovery of Silver Ions as Silver Nanocrystals on Poly(aniline‐<i>co</i>‐5‐sulfo‐2‐anisidine) Nanosorbents (2010)

Poly[aniline(AN)-co-5-sulfo-2-anisidine(SA)] nanograins with rough and porous structure demonstrate ultrastrong adsorption and highly efficient recovery of silver ions. The effects of five key factors-AN/SA ratio, Ag(I) concentration, sorption time, ultrasonic treatment, and coexisting ions-on Ag(I) adsorbability were optimized, and AN/SA (50/50) copolymer nanograins were found to exhibit much stronger Ag(I) adsorption than polyaniline and all other reported sorbents. The maximal Ag(I) sorption capacity of up to 2034 mg g(-1) (18.86 mmol g(-1)) is the highest thus far and also much higher than the maximal Hg-ion sorption capacity (10.28 mmol g(-1)). Especially at <or=2 mM Ag(I), the nanosorbents exhibit >or=99.98 % adsorptivity, and thus achieve almost complete Ag(I) sorption. The sorption fits the Langmuir isotherm well and follows pseudo-second-order kinetics. Studies by IR, UV/Vis, X-ray diffraction, polarizing microscopy, centrifugation, thermogravimetry, and conductivity techniques showed that Ag(I) sorption occurs by a redox mechanism mainly involving reduction of Ag(I) to separable silver nanocrystals, chelation between Ag(I) and -NH-/-N=/-NH(2)/-SO(3)H/-OCH(3), and ion exchange between Ag(I) and H(+) on -SO(3) (-)H(+). Competitive sorption of Ag(I) with coexisting Hg, Pb, Cu, Fe, Al, K, and Na ions was systematically investigated. In particular, the copolymer nanoparticles bearing many functional groups on their rough and porous surface can be directly used to recover and separate precious silver nanocrystals from practical Ag(I) wastewaters containing Fe, Al, K, and Na ions from Kodak Studio. The nanograins have great application potential in the noble metals industry, resource reuse, wastewater treatment, and functional hybrid nanocomposites.
New Perspectives on Amyloid-β Dynamics After Acute Brain Injury (2010)

The links between traumatic brain injury and Alzheimer disease have been of great interest for many years. However, the importance of amyloid-β-related neurodegenerative pathophysiologic processes after traumatic brain injury is still unknown. In this review, we present a brief overview of the scientific evidence regarding traumatic brain injury as a contributor to Alzheimer disease and describe recent results showing significant changes in brain extracellular amyloid-β dynamics in patients with severe brain injury. We then discuss the clinical significance of these findings with their implications for translational neurobiology and conclude with further directions for traumatic brain injury and Alzheimer disease research.
Application of plasma polymerized methylsilane resist for all-dry 193 nm deep ultraviolet processing (1995)

Preliminary experiments employing plasma polymerized methylsilane (PPMS) as a single and bilayer resist system demonstrated that the resist process developed at 248 nm is extendible for application at 193 nm. PPMS exhibited excellent photosensitivity with efficient photo-oxidative bleaching when exposed to 193 nm radiation in air. PPMS as thick as 200 nm demonstrated complete bleaching throughout the film. A nitrogen atmosphere was found to quench the photo-oxidative bleaching. However, upon switching the gas ambient to air, the photo-oxidative bleaching rapidly proceeded to completion. Both positive- and negative-tone images were achieved with PPMS at 193 nm depending upon the development process. Using negative-tone development in a chlorine plasma, 0.2 μm lines/spaces were resolved in 100 nm films at an exposure dose of 20 mJ/cm2 and with a depth of focus of nearly 1.0 μm.
Metagenome assembled genomes of novel taxa from an acid mine drainage environment (2020)

ABSTRACT Acid mine drainage (AMD) is a global problem in which iron sulfide minerals oxidize and generate acidic, metal-rich water. Bioremediation relies on understanding how microbial communities inhabiting an AMD site contribute to biogeochemical cycling. A number of studies have reported community composition in AMD sites from16S rRNA gene amplicons but it remains difficult to link taxa to function, especially in the absence of closely related cultured species or those with published genomes. Unfortunately, there is a paucity of genomes and cultured taxa from AMD environments. Here, we report 29 novel metagenome assembled genomes from Cabin Branch, an AMD site in the Daniel Boone National Forest, KY, USA. The genomes span 11 bacterial phyla and include one Archaea and include taxa that contribute to carbon, nitrogen, sulfur, and iron cycling. These data reveal overlooked taxa that contribute to carbon fixation in AMD sites as well as uncharacterized Fe(II)-oxidizing bacteria. These data provide additional context for 16S rRNA gene studies, add to our understanding of the taxa involved in biogeochemical cycling in AMD environments, and can inform bioremediation strategies. IMPORTANCE Bioremediating acid mine drainage requires understanding how microbial communities influence geochemical cycling of iron and sulfur and biologically important elements like carbon and nitrogen. Research in this area has provided an abundance of 16S rRNA gene amplicon data. However, linking these data to metabolisms is difficult because many AMD taxa are uncultured or lack published genomes. Here, we present metagenome assembled genomes from 29 novel AMD taxa and detail their metabolic potential. These data provide information on AMD taxa that could be important for bioremediation strategies including taxa that are involved in cycling iron, sulfur, carbon, and nitrogen.
Microbiological and Biotechnological Aspects of Metabolism of Carbamates and Organophosphates (1992)

Several carbamate and organophosphate compounds are used to control a wide variety of insect pests, weeds, and disease-transmitting vectors. These chemicals were introduced to replace the recalcitrant and hazardous chlorinated pesticides. Although newly introduced pesticides were considered to be biodegradable, some of them are highly toxic and their residues are found in certain environments. In addition, degradation of some of the carbamates generates metabolites that are also toxic. In general, hydrolysis of the carbamate and organophosphates yields less toxic metabolites compared with the metabolites produced from oxidation. Although microorganisms capable of degrading many of these pesticides have been isolated, knowledge about the biochemical pathways and respective genes involved in the degradation is sparse. Recently, a great deal of interest in the mechanisms of biodegradation of carbamate and organophosphate compounds has been shown because (1) an efficient mineralization of the pesticides used for insect control could eliminate the problems of environmental pollution, (2) a balance between degradation and efficacy of pesticides could result in safer application and effective insect control, and (3) knowledge about the mechanisms of biodegradation could help to deal with situations leading to the generation of toxic metabolites and bioremediation of polluted environments. In addition, advances in genetic engineering and biotechnology offer great potential to exploit the degradative properties of microorganisms in order to develop bioremediation strategies and novel applications such as development of economic plants tolerant to herbicides. In this review, recent advances in the biochemical and genetic aspects of microbial degradation of carbamate and organophosphates are discussed and areas in need of further investigation identified.
Learning Analytics - Need of Centralized Portal for Access to E-Learning Resources (2019)

Recently, e-learning resources become widespread in school education worldwide, as they are a prerequisite for an efficient learning process. These resources are scattered across many websites and their search takes too long. Despite their diversity, often it is difficult for teachers to find the proper resources. After analyzing the findings of an anonymous online survey of Bulgarian teachers on the use of ICT and e-learning resources, researchers identified the need for easy access to various e-resources for school education. The paper offers a concept for a centralized access portal where users to upload links to e-learning resources that are shortly described and classified according to several indicators. These include accessibility, type, subject, school grade, purpose and other meaningful parameters. Free registration for teachers and students will allow data to be aggregated by user groups, to carry out analyzes of the resources' usage, to draw trends, and to make conclusions for future policies.
Data Logic Structure and Key Technologies on Intelligent High-precision Map (2020)

Taking autonomous driving and driverless as the research object, we discuss and define intelligent high-precision map. Intelligent high-precision map is considered as a key link of future travel, a carrier of real-time perception of traffic resources in the entire space-time range, and the criterion for the operation and control of the whole process of the vehicle. As a new form of map, it has distinctive features in terms of cartography theory and application requirements compared with traditional navigation electronic maps. Thus, it is necessary to analyze and discuss its key features and problems to promote the development of research and application of intelligent high-precision map. Accordingly, we propose an information transmission model based on the cartography theory and combine the wheeled robot’s control flow in practical application. Next, we put forward the data logic structure of intelligent high-precision map, and analyze its application in autonomous driving. Then, we summarize the computing mode of “Crowdsourcing+Edge-Cloud Collaborative Computing”, and carry out key technical analysis on how to improve the quality of crowdsourced data. We also analyze the effective application scenarios of intelligent high-precision map in the future. Finally, we present some thoughts and suggestions for the future development of this field.
The Rearrangement of Hydrazones and Semicarbazones (1953)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Rearrangement of Hydrazones and SemicarbazonesD. E. Pearson, K. N. Carter, and C. M. GreerCite this: J. Am. Chem. Soc. 1953, 75, 23, 5905–5908Publication Date (Print):December 1, 1953Publication History Published online1 May 2002Published inissue 1 December 1953https://doi.org/10.1021/ja01119a037Request reuse permissionsArticle Views686Altmetric-Citations23LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (573 KB) Get e-Alertsclose Get e-Alerts
Synthesis and study of a new polyorganophosphazene (2001)

Abstract In this study, a new polyorganophosphazene with pendant carbazolyl groups was synthesized, and its structure was characterized by IR, 1 H‐NMR, and 31 P‐NMR spectroscopy. To understand its carrier photogeneration and transport property, we also studied fluorescence spectra and photovoltage spectra. Fluorescence spectra show that the polymer possesses properties dissimilar to those of PVK. There are only two emission peaks at ≈ 360 nm in its spectra, which coincides with that of the monomer model compound, 9‐ethylcarbazole. This may be because of the influence of the spacer. The results of SPS shows that band–band transition mainly comes from electron π–π* transition, and the polymer is a p ‐type semiconductor. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 1446–1451, 2001
Fate of Nitrogen and Phosphorus in a Waste‐water Retention Reservoir Containing Aquatic Macrophytes (1983)

Abstract Potential use of retention/detention reservoirs stocked with vascular aquatic macrophytes was evaluated, using a microcosm reservoir for reducing the N and P levels of agricultural drainage effluents (waste water). The treatments evaluated were reservoirs stocked with (i) pennywort ( Hydrocotyle umbellata L.), (ii) water hyacinth ( Eichhornia crassipes [Mart] Solms), (iii) cattails ( Typha latifolia L.) and elodea ( Egeria densa P), and (iv) control (no macrophytes). Labeled 15 N was used to differentiate preferential uptake of 15 NH 4 + and 15 NO 3 − , and to follow the fate of added 15 NH 4 + and 15 NO 3 − . Results showed that 34 to 40% of the added inorganic 15 N ( 15 NH 4 + + 15 NO 3 − ) was removed through plant uptake, while 45 to 52% of the added 15 N was unaccounted for, presumably lost through NH 3 volatilization and nitrification‐denitrification processes. In the control reservoir, algal biomass removed 4.4% of added 15 N, while 41% of the added 15 N was not accounted. Pennywort and cattail‐elodea systems were found to be most effective, with about 50% inorganic N removal in a 4‐day detention period. All aquatic macrophytes preferred 15 NH 4 + over 15 NO 3 − , but the difference in uptake was not significant, except for pennywort and cattails, which removed 84 and 92% of the added 15 NH 4 + as compared to 16 and 8% of the added 15 NO 3 − , respectively. About 25 to 29 d were required by the systems with macrophytes to remove 50% of the wastewater P. Plant removal of P was in the range of 3 to 65% of added P, while 7 to 87% of the added P was lost through precipitation and adsorption reactions.
The Indonesian Communists and the CPSU Twenty-Second Congress (1962)

Research Article| March 01 1962 The Indonesian Communists and the CPSU Twenty-Second Congress Donald Hindley Donald Hindley Search for other works by this author on: This Site PubMed Google Scholar Memorandum (Institute of Pacific Relations, American Council) (1933) 2 (1): 20–27. https://doi.org/10.2307/3023655 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation Donald Hindley; The Indonesian Communists and the CPSU Twenty-Second Congress. Memorandum (Institute of Pacific Relations, American Council) 5 January 1933; 2 (1): 20–27. doi: https://doi.org/10.2307/3023655 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search nav search search input Search input auto suggest search filter All ContentAsian Survey Search This content is only available via PDF. Article PDF first page preview Close Modal You do not currently have access to this content.
Relationship of the chemical structure and immunobiological activities of lipoteichoic acid from<i>Streptococcus faecalis</i>(<i>Enterococcus hirae</i>) ATCC 9790 (1991)

Two molecular species of lipoteichoic acid (LTA 1 and LTA 2) were isolated from whole cells of Streptococcus faecalis (Enterococcus hirae) ATCC 9790 by hydrophobic chromatography on Octyl Sepharose CL-4B. Chemical analysis revealed that LTA 1 and LTA 2 contained two and four acyl lipid anchors respectively. LTA 1 was less active than LTA 2 in inducing cytokines, except interleukin-1 (IL-1), but their in vivo antitumour effects were similar. LTA 2 was a potent inducer of tumour necrosis factor (TNF) and interferon (IFN) production and had excellent antitumour activity against Meth A fibrosarcoma established in mice. Deacylation of LTA 2 by alkaline hydrolysis abolished these biological activities. The phosphatidylglycolipid fraction derived from LTA 2 after acid hydrolysis could also induce TNF, IFN, and IL-1 production, as well as having antitumour activity against Meth A fibrosarcoma. Therefore, the lipid anchor portion of S. faecalis LTA may play an important role in the manifestation of these various biological activities.
Electrically driven microseparation methods for pesticides and metabolites. II: On-line and off-line preconcentration of urea herbicides in capillary electrochromatography (1999)

Capillary electrochromatography (CEC) was introduced to the separation of nine important urea herbicides using octadecyl-silica (ODS) capillary columns that were specially designed to allow the realization of a relatively strong electroosmotic flow (EOF) and, in turn, fast separations. The ODS stationary phase was intentionally prepared to have a low surface coverage in octadecyl ligands in order to ensure a strong EOF. This ODS stationary phase of low surface coverage exhibited the usual reversed-phase chromatographic behavior as was manifested by the linearity of plots of log k' versus the percent organic modifier in the mobile phase. The nature of the organic modifier of the mobile phase influenced the order of elution as well as the separation efficiency of the nine urea herbicides. Mobile phases containing acetonitrile yielded higher separation efficiency (by a factor of 1.5) than methanol-containing mobile phases. This was attributed to the higher mass transfer resistances of the solute in and out of the pores in the presence of the more viscous methanol-containing mobile phases. Due to the relatively strong affinity of the urea herbicides to the ODS stationary phase, on-line preconcentration consisting of prolonged injections allowed the determination of 10−5 M urea herbicide samples using a UV detector without sacrificing separation efficiency. This was further decreased to 10−7 M when the prolonged injection was preceded by the injection of a plug of water. The plug of water (the more retentive mobile phase) brought about an enhanced accumulation of the dilute samples into a narrow band at the inlet of the CEC column. When this on-column sample enrichment approach was combined with an off-line sample preconcentration step, which consisted of a solid-phase extraction process, ultra dilute samples of 10−10 M (0.1 ppb) could be detected.
Simulation of Coherent Doppler Lidar Performance for Space-Based Platforms (2000)

The performance of coherent Doppler lidar velocity estimates for a space-based platform are produced using computer simulations of raw data and statistical descriptions of the resulting velocity estimates. The random spatial variability of the wind field and aerosol backscatter is included as well as the improvement using coprocessing of multiple shots for a fixed lidar beam geometry. Performance of velocity estimates is defined as the rms error of the good radial velocity estimates and the fraction of bad estimates in low signal conditions. For a wide range of conditions, performance is effectively described by a few basic parameters that are a function of the atmospheric conditions and the lidar design. The threshold signal level for acceptable velocity measurements scales as N−1/2, where N is the number of coprocessed lidar shots. For a 100-km satellite track and N = 100 lidar shots, the rms error is typically less than 0.4 m s−1 for high signal levels.
Fault zone monitoring with passive image interferometry (2007)

The technique of passive image interferometry applies interferometric methods to correlation functions of seismic noise to monitor small temporal variations of the Earth interior. We computed the autocorrelation function of seismic noise recorded at a single seismometer located in the vicinity of the source region of the Mw= 6.6 Mid‐Niigata earthquake. Analysing the temporal evolution of the autocorrelation function, which is interpreted as the source–receiver collocated elastic wave Green's function, we detect a sudden decrease of relative seismic velocity in the Earth crust of −0.6 per cent that coincides with the occurrence of the earthquake. This drop of seismic velocity is likely to be caused by the change of stress in the source region of the earthquake.
An improved design of microstrip patch antennas using compact microstrip resonant cell (2004)

A simple impedance matching technique is presented for microstrip patch antennas using a compact microstrip resonant cell (CMRC). The characteristic impedance of a microstrip line is controlled due to the additional effective inductance of the CMRC. Without any matching circuits, microstrip patch antennas can be easily fed by a 50 /spl Omega/ line with CMRC.
The Exploration of Icephobic Materials and Their Future Prospects in Aircraft Icing Applications (2012)

Figure 1: Various super-cooled droplet sized encounters in presence of a rising air system and high humidity resulting in aircraft icing [3]. Figure 2: A possible impact scenario, with liquid impacts ensuing in either splashing, ice adhesion or erosion [5]. Ever since the early days of aviation, scientists have undertaken numerous challenges pertaining to the influence of atmospheric conditions on flight characteristics and performance. A specific flight scenario may expose the airframe of the aircraft to various factors related to weather conditions such as lighting strikes, gust, rain, hail, snow and in rare conditions volcanic ash [1]. Although it is unlikely that an aircraft will be subjected to all of these conditions simultaneously, the sudden temperature change that the vehicle experiences between on-ground conditions and the cruise altitude can be considerably significant. The aforementioned conditions hence place stringent requirements on the external surfaces of the aircraft and their respective material characteristics.
Filtering effects of mid-cord offset measurements on track geometry data (2003)

The filtering effects of mid-cord offset measurements on the track geometry data are evaluated. A common method of measuring track geometry is using track measurement railcars that record the track deviations from the nominal measures at the mid cord of two points that are 62 feet apart. Alternatively, the track measurements can be made at discrete points, commonly one foot apart, independent of any other measurements. This method is referred to as space curve measurements. This study shows that special attention must be paid to the distortion effect of 62-foot mid-cord measurements on the data. A comparison of the gain and phase response of a space curve and mid-cord offset data in the frequency domain shows that mid-cord offset measurements greatly attenuate the low-frequency contents of the data and also introduce a ripple or scalloping effect at the higher spatial frequencies.