gebhart/patrepeval huggingface dataset:
Luminescent d0 scandocene complexes: photophysical studies and electronic structure calculations on Cp*2ScX (X = Cl, I, Me) (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescent d0 scandocene complexes: photophysical studies and electronic structure calculations on Cp*2ScX (X = Cl, I, Me)Brian W. Pfennig, Mark E. Thompson, and Andrew B. BocarslyCite this: Organometallics 1993, 12, 3, 649–655Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://pubs.acs.org/doi/10.1021/om00027a014https://doi.org/10.1021/om00027a014research-articleACS PublicationsRequest reuse permissionsArticle Views222Altmetric-Citations39LEARN 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 InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
A Multimode 5–6 GHz sige BiCMOS PA design powers emerging wireless LAN radio standards (2017)

A multimode 5-6 GHz SiGe BiCMOS PA IC that powers the emerging Wireless LAN applications is presented. The design can be realized in a 1.35 × 0.7 active area as a standalone power amplifier (PA) or the transmit (Tx) chain of a Front-end IC. The design features multiple modes with low DEVM supporting 1024 QAM data rates and >20 dB accurate power controls. The linearity is well scaled with supply voltage from 2.8V to 5.5 V and insensitive to modulation bandwidths and duty cycles. With a 5 V supply, the PA has 32 dB gain and meets -41 dB DEVM for 1024 QAM, up to 20 dBm Pout and -35 dB DEVM for 256 QAM 802.11ac up to 21 dBm Pout. The design has also support a low power mode having 3 dB less linear power, with reduced current. With DPD, the low linearity mode can achieve similar linear power as the high linearity mode with 40 mA current reduction. The diverse features of the PA IC simplify front-end circuit designs of emerging high throughput radio standards.
Measurement ofWandZboson production cross sections inpp¯collisions ats=1.8TeV (1999)

D\O{} has measured the inclusive production cross section of W and Z bosons in a sample of 13 ${\mathrm{pb}}^{\ensuremath{-}1}$ of data collected at the Fermilab Tevatron. The cross sections, multiplied by their leptonic branching fractions, for production in $p\overline{p}$ collisions at $\sqrt{s}=1.8$ TeV are ${\ensuremath{\sigma}}_{W}\mathrm{B}(\stackrel{\ensuremath{\rightarrow}}{W}e\ensuremath{\nu})=2.36\ifmmode\pm\else\textpm\fi{}0.02\ifmmode\pm\else\textpm\fi{}0.08\ifmmode\pm\else\textpm\fi{}0.13\mathrm{}\mathrm{nb},$ ${\ensuremath{\sigma}}_{W}\mathrm{B}(\stackrel{\ensuremath{\rightarrow}}{W}\ensuremath{\mu}\ensuremath{\nu})=2.09\ifmmode\pm\else\textpm\fi{}0.06\ifmmode\pm\else\textpm\fi{}0.22\ifmmode\pm\else\textpm\fi{}0.11\mathrm{}\mathrm{nb},$ ${\ensuremath{\sigma}}_{Z}\mathrm{B}(\stackrel{\ensuremath{\rightarrow}}{Z}{e}^{+}{e}^{\ensuremath{-}})=0.218\ifmmode\pm\else\textpm\fi{}0.008\ifmmode\pm\else\textpm\fi{}0.008\ifmmode\pm\else\textpm\fi{}0.012\mathrm{}\mathrm{nb}$, and ${\ensuremath{\sigma}}_{Z}\mathrm{B}(\stackrel{\ensuremath{\rightarrow}}{Z}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}})=0.178\ifmmode\pm\else\textpm\fi{}0.022\ifmmode\pm\else\textpm\fi{}0.021\ifmmode\pm\else\textpm\fi{}0.009\mathrm{}\mathrm{nb}$, where the first uncertainty is statistical and the second systematic; the third reflects the uncertainty in the integrated luminosity. For the combined electron and muon analyses, we find ${\ensuremath{\sigma}}_{W}\mathrm{B}(\stackrel{\ensuremath{\rightarrow}}{W}l\ensuremath{\nu})/{\ensuremath{\sigma}}_{Z}\mathrm{B}(\stackrel{\ensuremath{\rightarrow}}{Z}{l}^{+}{l}^{\ensuremath{-}})=10.90\ifmmode\pm\else\textpm\fi{}0.52$. Assuming standard model couplings, we use this result to determine the width of the W boson, and obtain $\ensuremath{\Gamma}(W)=2.044\ifmmode\pm\else\textpm\fi{}0.097 \mathrm{GeV}$.
Innate Inflammatory Responses of Pediatric Cystic Fibrosis Airway Epithelial Cells (2011)

There is controversy regarding whether cystic fibrosis (CF) airway epithelial cells (AECs) are intrinsically proinflammatory. The objective of the current study was to characterize the inflammatory profiles of AECs from children with CF compared with cells from healthy control subjects. We obtained AECs from healthy children (12) and children with CF (27). Biochemical and functional characteristics were assessed by stimulating cells with IFNγ, LPS, a cocktail referred to as cytomix, which consists of IFNγ, IL-1β, TNF-α, and LPS, or with human rhinovirus (HRV). Cytokine production was assessed using ELISA. Apoptotic responses to HRV infection were measured via production of single-stranded DNA. Our results indicated that CF and healthy cells exhibited similar morphology in monolayer culture. CF cells constitutively produced greater amounts of IL-6, IL-1β, and prostaglandin E(2), but similar levels of IL-8 and soluble intracellular adhesion molecule-1 compared with healthy cells, and this profile was maintained through repeated passage. Stimulation with LPS or cytomix elicited similar levels of IL-8 in CF and non-CF cells. In contrast, exposure to HRV1b resulted in a marked increase in IL-8 production from CF compared with non-CF cells. CF cells also exhibited reduced apoptosis and increased viral replication compared with non-CF cells after exposure to HRV1b. We conclude that CF and healthy AECs have similar basal and stimulated expression of IL-8 in response to proinflammatory stimuli, but elevated IL-8 release in response to HRV infection. The elevated IL-8, together with dampened apoptotic responses by CF cells to HRV, could contribute to augmented airway inflammation in the setting of recurrent viral infections early in life.
ChemInform Abstract: Intramolecular Arylcyanation of Alkenes Catalyzed by Nickel/AlMe2Cl. (2009)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Using Domain Information for Word Sense Disambiguation (2001)

The major goal in ITC-irst&amp;apos;s participation at SENSEVAL-2 was to test the role of domain information in word sense disambiguation. The underlying working hypothesis is that domain labels, such as MEDICINE, ARCHITECTURE and SPORT provide a natural way to establish semantic relations among word senses, which can be profitably used during the disambiguation process. For each task in which we participated (i.e. English all words, English &amp;apos;lexical sample&amp;apos; and Italian &amp;apos;lexical sample&amp;apos;) a different mix of knowledge based and statistical techniques were implemented. 1
Dendrimer-Assisted Self-Assembled Monolayer of Iron Nanoparticles for Vertical Array Carbon Nanotube Growth (2009)

Self-assembled monolayers (SAMs) of iron oxide nanoparticles have been prepared using carboxylic-acid-terminated dendrimers. The iron-containing SAM was used as the catalyst for growth of vertical arrays of carbon nanotubes (CNTs). This approach has the potential for producing diameter controlled CNTs from premade catalyst nanoparticles as well as large scale production of CNTs by chemical vapor deposition.
Computing Bounds on Free Energy Changes with One and Two Dimensional Paths (1997)

The rapid computation of free energy changes is important for molecular design. Here we examine the use of Hamiltonian switching simulations, which provide rigorous upper and lower bounds to free energy changes, for computing the solvation energy difference of small molecules. We explore a number of switching pathways to shorten the relaxation time of the system and improve convergence of the free energy bounds.
Mechanical and piezoelectric properties of zinc oxide nanorods grown on conductive textile fabric as an alternative substrate (2014)

The present research is devoted to understanding the mechanism and causes of variation in the piezoelectric potential generated from vertically aligned zinc oxide (ZnO) nanorods (NRs), which were grown on a conductive textile fabric as an alternative substrate by using the aqueous chemical growth method. The piezoelectric voltage was harvested from vertically aligned ZnO NRs having different physical parameters by using atomic force microscopy in contact mode and the variation in the generated piezoelectricity was investigated. The generated output potential indicates that different physical parameters such aspect ratio, crystal size and lattice internal crystal strain have a strong influence on the piezoelectric properties of vertically aligned ZnO NRs, which were grown on a textile fabric. Presented results indicate that textiles can be used as an alternative substrate just like the other conventional substrates, because our results are similar/better than many reported works on conventional substrates.
Hemerythrin's oxygen-binding reaction studied by laser photolysis. (1981)

The dioxygen--iron bond in oxyhemerythrin is shown to be photosensitive. The recombination reaction after photodissociation depends strongly on solvent viscosity. In water (eta = 1 centipoise or 1 x 10(-3) Pa . s) the recombination is monophasic and second-order in solvent oxygen concentration, with a bimolecular rate coefficient of 2.9 x 10(7) M-1 s-1. In a glycerol/water mixture (eta = 180 centipoise) a concentration-dependent geminate recombination process is also seen. This opens a class of proteins to study by flash photolysis.
Mondrian hidden Markov model for music signal processing (2014)

This paper discusses a new extension of hidden Markov models that can capture clusters embedded in transitions between the hidden states. In our model, the state-transition matrices are viewed as representations of relational data reflecting a network structure between the hidden states. We specifically present a nonparametric Bayesian approach to the proposed state-space model whose network structure is represented by a Mondrian Process-based relational model. We show an application of the proposed model to music signal analysis through some experimental results.
Reaching out with wireless (2011)

The application of wireless for humanitarian relief can be greatly enhanced by circumventing the range limitations of current technologies, without requiring bulky transceivers with very large antennas. In this talk, we discuss two broad approaches to this problem, and give some preliminary results that illustrate the promise of these approaches. The first approach is the use of distributed antenna arrays using cooperation among neighboring nodes. Promising results over the past few years, both in terms of theory and prototyping, indicate that such distributed arrays have the potential of providing order of magnitude range improvements, along with enhanced spatial reuse. Such distributed arrays are easy to set up and tear down, since they can be realized with nodes with compact form factor, and allow operation over large carrier wavelengths (for which conventional centralized antenna arrays would be too bulky), thus significantly enhancing propagation. The second approach is the use of autonomous mobile agents such as Unmanned Aerial Vehicles (UAV) as an integral part of the sensing and communications infrastructure., which can, providing connectivity in disconnected networks and for tracking survivors using radio frequency (RF) beacons. We discuss promising recent results on providing adaptive UAV-based data collection and processing for disconnected sensor networks, and on robust algorithms for following RF beacons despite large spatial fades (which apply, for example, for tracking survivors in a disaster situation).
Synthesis and characterization of isosorbide-based polyphosphonates as biobased flame-retardants (2014)

A new isosorbide-based polyphosphate was synthesized and applied as a flame-retardant for polylactic acid (PLA). The storage modulus and glass transition temperature of PLA/polyphosphonate blends was unaffected by the inclusion of polyphosphonate, but moderate depressions of PLA's tensile strength (16%, 28%, and 45% reduction from PLA at a polyphosphonate mass percentage of 5%, 10%, and 15%, respectively) and strain-at-break (0%, 17%, and 30% reduction from PLA at a polyphosphonate mass percentage of 5%, 10%, and 15%, respectively) were observed. Modified UL-94 flammability testing indicated that isosorbide-based polyphosphonates are effective flame retardants for PLA and are able to self-extinguish flames in less than 2 s to achieve V2 and V0 ratings at polyphosphonate mass percentage of 5% and 15%, respectively. Fire test data indicates a gas phase mechanism that can quench the flame when no external radiant heat flux is present (e.g., in modified UL-94 testing) but does not affect the material's heat release rate in forced combustion (e.g., in cone calorimetry). Use of the biobased flame retardants described herein yields flame retardant PLA containing up to 97% by mass of bio-derived content.
Dual voltage DC generator for compact light-weight ship electrical systems (2011)

This paper proposes a dual voltage DC (DVDC) generation architecture for `Integrated Power System (IPS)' able to provide substantial size and weight reductions. The system uses an open-winding synchronous generator with a medium voltage (MV) active rectifier placed at one end and a low voltage (LV) active rectifier at the other. The two rectifiers are controlled to create a medium-voltage dc bus to feed the propulsion and pulsed weapon loads, and a low voltage DC bus for ship service needs. This architecture derives appropriate voltages for the propulsion and ship service loads from the shared generator while completely eliminating the need for transformers. This paper presents the voltage regulation technique for both medium-voltage and low voltage dc buses. It also discusses the fault management strategy.
Transition Metal Complexes with Sulfur Ligands, 123[[ Synthesis and Reactivity of New Complexes Containing the [Ru(“S4”)] Fragment [S42‐ = 1,2‐Bis(2‐mercaptophenylthio)ethane(2‐)] (1997)

Abstract In order to synthesize labile and well‐soluble [Ru(L)(L')(“S 4 ”)] complexes, [Ru(CI) 2 (DMSO) 4 ] was treated With “S 4 ”‐Na 2 (S 4 2‐ = 1,2‐bis(2‐mercaptophenylthio)‐ethane(2–1)] yielding [Ru(DMSO) 2 (“S 4 ”)] ( 1 which contains two labile DMSO ligands. An X‐ray structural analysis of 1 , verifies that both DMSO ligands are coordinated via their S atoms. The reaction of 1 with small ligands such as PR 3 (R = Et, n Pr, n Bu) or tetrahydrothiophene (THT) leads to substitution of both DMSO ligands yielding [Ru(PR 3 ) 2 (“S 4 ”)] (R = Et 3a , n Pr 3b , n Bu 3c ) and [Ru(THT) 2 (“S 4 ”] 2 , respectively, while bulky phosphane ligands such as PCy 3 and P i Pr 3 substitute one DMSO ligand to yield [Ru(DMSO)(PR 3 ])(“S 4 ”] (R = i Pr 4a , Cy 4b ). X‐ray structural analyses of [Ru(PnPr 3 ) 2 (“S 4 ”)] · 0.5 MeOH ( 3b · 0.5 MeOH), [Ru(PnBu 3 ) 2 (S 4 )} ( 3c ), and [Ru(Pme 3 ) 2 (“S 4 ”)] ( 3d ) confirm the pseudo‐octahedral coordination of the Ru centers by four Sdonors and two cis P‐donors and reveal close similarities bet ween the three complexes. Comparision of the structural parameters of 3b · 0.5 MeOH, 3c and 3d with those of [Ru(PPh 3 ) 2 (“MeS, 4 ”)] [MeS 4 “2” = 1,2‐bis(2‐mercaptophenylthio)propane(2–1)] indicates that the inertness towards substitution of 3b · 0.5 MeOH, 3c and 3d as opposed to the substitution lability of [Ru(PPh 3 ) 2 (,MeS 4 “)] is caused by the small cone angles of the alkyl phosphanes. In the DMSO/PCy 3 complex 4b both coligands are labile, and which one is substituted depends on the size of the entering ligand. The reactions of 4b with P n R 3 yield [Ru(DMSO)(PR 3 )('S 4 ”)] (R = n Pr 4c , n Bu 4d ) in contrast to the reaction with CO. PMe 3 , and SMe 2 which give [Ru(CO)(Pcy 3 )(“S 4 ”)] ( 5b ), [Ru(P‐Me 3 )(PCy 3 )(“S 4 ”)] ( 6 , and [Ru(SMe 2 )(PCy 3 )(“S 4 ”)] ( 7 , respectively. In an analogous manner, the CO complexes [Ru(CO(PR 3 )(“S 4 ”)] (R = i Pr 5a , n Bu 5c ) have been obtained by treatement of 4a and 4d with CO. The reactions of 4a and 4b with S 8 yielded the readily soluble μ‐S 2 complexes [μ‐S 2 [Ru(PR 3 )(“S 4 ”)] 2 ] (R ‐ i Pr 8a , Cy 8b ). The spectroscopi9c data of complex 8b and its cyclic voltammogram, which exhibits four quasi‐reversible redox waves, indicate a strong electronic coupling of the two [Ru(PCy 3 )(“S 4 ”)] fragments via the μ‐S 2 bridge.
Automated cellular sample preparation using a Centrifuge-on-a-Chip (2011)

The standard centrifuge is a laboratory instrument widely used by biologists and medical technicians for preparing cell samples. Efforts to automate the operations of concentration, cell separation, and solution exchange that a centrifuge performs in a simpler and smaller platform have had limited success. Here, we present a microfluidic chip that replicates the functions of a centrifuge without moving parts or external forces. The device operates using a purely fluid dynamic phenomenon in which cells selectively enter and are maintained in microscale vortices. Continuous and sequential operation allows enrichment of cancer cells from spiked blood samples at the mL min(-1) scale, followed by fluorescent labeling of intra- and extra-cellular antigens on the cells without the need for manual pipetting and washing steps. A versatile centrifuge-analogue may open opportunities in automated, low-cost and high-throughput sample preparation as an alternative to the standard benchtop centrifuge in standardized clinical diagnostics or resource poor settings.
Comparison of the efficacy of MOE and PMO modifications of systemic antisense oligonucleotides in a severe SMA mouse model (2020)

Spinal muscular atrophy (SMA) is a motor neuron disease. Nusinersen, a splice-switching antisense oligonucleotide (ASO), was the first approved drug to treat SMA. Based on prior preclinical studies, both 2'-O-methoxyethyl (MOE) with a phosphorothioate backbone and morpholino with a phosphorodiamidate backbone-with the same or extended target sequence as nusinersen-displayed efficient rescue of SMA mouse models. Here, we compared the therapeutic efficacy of these two modification chemistries in rescue of a severe mouse model using ASO10-29-a 2-nt longer version of nusinersen-via subcutaneous injection. Although both chemistries efficiently corrected SMN2 splicing in various tissues, restored motor function and improved the integrity of neuromuscular junctions, MOE-modified ASO10-29 (MOE10-29) was more efficacious than morpholino-modified ASO10-29 (PMO10-29) at the same molar dose, as seen by longer survival, greater body-weight gain and better preservation of motor neurons. Time-course analysis revealed that MOE10-29 had more persistent effects than PMO10-29. On the other hand, PMO10-29 appears to more readily cross an immature blood-brain barrier following systemic administration, showing more robust initial effects on SMN2 exon 7 inclusion, but less persistence in the central nervous system. We conclude that both modifications can be effective as splice-switching ASOs in the context of SMA and potentially other diseases, and discuss the advantages and disadvantages of each.
Developing underfill process in screening of no-flow underfill and wafer-applied underfill materials for 3D stacking (2013)

The demands and challenges in pushing the limits of Moore's Law made the 3D IC stacking radiate the pressure for MPTs (materials, processes and tools) in keeping up with the technology. The 3D IC architecture design built around the TSVs, micro-bumps and thinned wafers/dies is the center of the show, of which the MPTs must conform and be viable to be part of the supporting cast. Underfilling's main objectives is to provide the mechanical stability for micro-bumps and prevents moisture between the resulting gap between dies before the 3D stack is sent for packaging. With several complexities in 3D stacking had to be considered and addressed in applying the underfill materials. Complexities such as the stacking options Die-to-Die (D2D) or Die-to-Wafer (D2W), the thicknesses of the dies to be stacked (~50 um die thickness), the thermo-compression bonding parameters to be used and the behavior of the underfill materials to the different process parameters had to considered during the characterization process of underfills.
Kinetic and equilibrium studies of the interaction of amsacrine and anilino ring-substituted analogues with DNA. (1986)

The kinetic stability of complexes of the clinical antileukemic drug amsacrine and anilino ring-substituted analogues with DNA has been studied by using the surfactant sequestration technique in a stopped-flow spectrophotometer. In addition, viscometric measurements using covalently closed circular DNA and displacement measurements of DNA-bound ethidium have been performed to evaluate helix unwinding angles and association constants, respectively. Amsacrine and its analogues dissociate from DNA by a complex kinetic pathway which involves at least three discernible transiently bound forms of the drug. Dissociation time constants for amsacrine are found to range from less than 1 to 6 ms in buffer of ionic strength 0.1, and the biomolecular association rate constant is greater than 10(6) M-1 s-1. We find that amsacrine forms one of the weakest intercalation complexes among the compounds studied, as judged by the criteria of kinetic stability, affinity, and chromophore-base pair stacking interactions. Unlike other compounds of this broad class (intercalating chromophores bearing sterically-demanding side chains), addition of the bulky side chain has little effect on the kinetic stability of the drug-DNA complexes, suggesting that the acridinesulfonanilides may intercalate into DNA from the less sterically demanding major groove of the helix. Such a binding geometry would facilitate the formation of the previously proposed ternary complex between amsacrine, DNA, and gene-regulatory enzymes (e.g., topoisomerases and repressors) which are known to bind in the major groove.
ChemInform Abstract: Preparation and Double Michael Addition Reactions of a Synthetic Equivalent of the Nazarov Reagent. (2013)

Abstract The synthetic equivalent of the Nazarov reagent (II) is stable in storage at ‐20 °C under N 2 ‐atmosphere for several months.
Particle swarm optimisers for the designing of parametric adjustment laws in discrete-time adaptive systems (2014)

A large variety of linear/nonlinear adaptive systems in continuous/discrete time can be represented by using error models, which facilitates their analysis. In addition, a solution found for a particular error model constitutes an universal strategy which can be applied to any system represented through that error model. In this paper, we present a novel methodology based on particle swarm optimisers for online parametric adjustment in discrete-time adaptive systems represented by type 1, 2, and 3 error models, which provides stability properties and high performance compared with traditional techniques. Successful applications in combined and direct model reference adaptive control via detailed simulations are provided.