gebhart/patrepeval huggingface dataset:
.beta.-Diketone reagents for the determination of borate in water (1978)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT.beta.-Diketone reagents for the determination of borate in waterJack L. Lambert, Joseph V. Paukstelis, and Roderick A. BruckdorferCite this: Anal. Chem. 1978, 50, 6, 820–822Publication Date (Print):May 1, 1978Publication History Published online1 May 2002Published inissue 1 May 1978https://pubs.acs.org/doi/10.1021/ac50027a037https://doi.org/10.1021/ac50027a037research-articleACS PublicationsRequest reuse permissionsArticle Views76Altmetric-Citations6LEARN 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
Phonon-induced relaxation in theCr7Nimagnetic molecule probed by NMR (2010)

We study the phonon-induced relaxation dynamics in the heterometallic ${\text{Cr}}_{7}\text{Ni}$ ring. By assuming that spin-phonon coupling occurs through the modulation of local crystal fields, we investigate the decay of time correlations of molecular observables, such as fluctuations of the cluster magnetization. Single-crystal $^{1}\text{H}$ nuclear magnetic resonance measurements have been performed for two orthogonal orientations of the applied magnetic field. The nuclear spin-lattice relaxation rate $1/{T}_{1}$ probes fluctuations of specific molecular observables, thus allowing to determine the magnetoelastic coupling strength and to calculate the magnetization relaxation time as well as phonon-induced level lifetimes. The knowledge of these time scales is crucial to control the spin dynamics of the magnetic cluster in view of the potential technological applications.
Mechanics of land subsidence due to groundwater pumping (2009)

Abstract This paper presents the formulation of the basic mechanics governing the changes in stress states from groundwater pumping and comparisons among predicted land subsidence from this mechanics with existing analyses and field data. Land subsidence is a growing, global problem caused by petroleum and groundwater withdrawal, mining operations, natural settlement, hydro‐compaction, settlement of collapsible soils, settlement of organic soils and sinkholes. This paper is concerned with the land subsidence due to groundwater level decline by groundwater pumping. It is shown that the stress state consists of asymmetric stresses that are best simulated by a Cosserat rather than a Cauchy continuum. Land subsidence from groundwater level decline consists of vertical compression (consolidation), shear displacement and macro‐rotation. The latter occurs when conditions are favorable (e.g. at a vertical interface) for the micro‐rotation imposed by asymmetric stresses to become macro‐rotation. When the length of the cone of depression is beyond √2 times the thickness of the aquifer, simple shear on vertical planes with rotation is the predominant deformation mode. Otherwise, simple shear on horizontal planes is present. The predicted subsidence using the mechanics developed in this paper compares well with data from satellite‐borne interferometric synthetic aperture radar. Copyright © 2009 John Wiley &amp; Sons, Ltd.
Kinetic studies on the effect of the heme iron(III) on the protein folding of ferricytochrome c. (1979)

The three-dimensional conformation of ferricytochrome c results from specific folding of the polypeptide chain around the covalently bound heme so that His-18 and Met-80 are axially coordinated to the Fe(III). The Fe(III)-free, porphyrin protein has an intrinsic viscosity, sedimentation coefficient, and circular dichroism indicative of a compact, globular protein conformation comparable to the holoprotein. Both the porphyrin protein and ferricytochrome c are reversibly denatured by guanidinium chloride. Refolding of the porphyrin protein occurs in essentially a single, exceptionally rapid kinetic phase (tau = 14 ms, 0.75 M guanidinium chloride, pH 6.5, 25 degrees C); whereas refolding of ferricytochrome c occurs in two slower kinetic phases (TAU 1 = 0.10 S, TAU 2 = 20 S) UNDER COMPARABLE CONDITIONS. The presence of Fe(III) in the metalloporphyrin of ferricytochrome c thus has a major effect on the protein folding kinetics. The slow kinetic phase is evidently due to this effect of Fe(III) and not to the slow cis-trans isomerism of the peptide bond of proline residues as has been suggested.
Total Wet-end System with Reduced Alum Dosage for Linerboard (2006)

製紙業界では近年，地球環境問題に対する配慮が必要不可欠になる一方で，収益改善を目的とした合理化，コストダウンを余儀なくされており，製紙工程の環境が急激に変化している。板紙に着目すると，雑誌古紙の配合比率が増加するなど原料事情が変化し，抄造系への炭酸カルシウムの混入量が増加する傾向にある。そのため，抄造系のpHが上昇し，それを抑えるために過剰な硫酸や硫酸バンドを使用している現状がある。また，石膏スケール問題が頻繁に発生したり，電気伝導度が上昇し内添薬品の効果が低下したりするなどの弊害が生じている。このような状況の下，板紙において硫酸バンドを削減しながら，いかに有効に使用するかを模索することが今後重要となる。硫酸バンドを減少するだけではデメリットも生じるが，トータル処方としてのウェットエンドシステムを適用すれば，それらのデメリットを解消できるだけでなく，相乗効果による品質向上が見込まれる。本報では硫酸バンド量を削減し，地球環境への配慮，品質向上，生産性の向上といった現代の板紙抄造が抱える課題を同時に解決することができるトータルウェットエンドシステムについて紹介する。
29.1 A 40nm 64Kb 56.67TOPS/W Read-Disturb-Tolerant Compute-in-Memory/Digital RRAM Macro with Active-Feedback-Based Read and In-Situ Write Verification (2021)

As memory-centric workloads (AI, graph-analytics) continue to gain momentum, technology solutions that provide higher on-die memory capacity/bandwidth can provide scalability beyond SRAM. Resistive RAM (RRAM) owing to (1) higher bit-density (2-4× of SRAM), (2) CMOS process/voltage compatibility, (3) nano-second read (RD) and (4) non-volatility has emerged as a promising candidate [1]. In spite of early prototypes, several technology challenges remain, and need to be addressed through circuit-technology co-design [1]. This paper presents a 64Kb RRAM macro supporting: (1) a programmable (1 to 9) number of row-accesses (N) to enable vector-matrix multiplication (referred to as compute-in-memory, or CIM) for a target algorithm-level inference-accuracy [2] -[8], (2) voltage-based RD with active feedback, advancing the state-of-the-art current-based RD, targeted for the low ratio between the high-resistance-state (HRS) and low-resistance-state (LRS) in typical RRAM, (3) RD-disturb tolerance under RRAM drift, through embedded RD-disturb monitor and write (WR)-back and (4) in-situ WR verification to enable a tight resistance distribution.
Range resolved mode mixing in a large volume for the mitigation of speckle and strategic target orientation requirements in active millimeter-wave imaging (2015)

In spite of many reports of active millimeter-wave imaging in the literature, speckle and requirements for cooperative target orientation significantly reduce its practical usefulness. Here we report a new technique, range resolved mode mixing (RRMM), which significantly mitigates both of these issues. It also provides a three-dimensional (3D) image. RRMM accomplishes this by combining multimode illumination (which eliminates the requirement for cooperative target orientation) with range resolution (which provides statistical independence of speckle patterns for averaging and the 3D image). The use of a 5W extended interaction klystron amplifier results in large signal margins in the 50 m scale atrium of the Physics Department at Ohio State University. It appears that there are a number of scenarios out to a range of 1 km for which this approach is useful to provide 3D images, with minimal speckle, and no requirement for cooperative target orientation.
Age, Product Nutrition, and Label Format Effects on Consumer Perceptions and Product Evaluations (1996)

Nutrition label format effects across different levels of product nutrition value and groups of younger (under 58 years; average 46 years) and older consumers (58 years or more; average 70 years) are examined using a 3 × 2 × 2 experimental design. Age interacts with nutrition level in affecting nutrition evaluation measures with older consumers displaying smaller differences in nutrition attitude and purchase likelihood for a low versus a high nutrition value product. Older consumers also perceive all labels as more difficult to understand. Consumer performance on judgment tasks vary across label formats and nutrition value manipulations. Implications for consumer welfare and future research are offered.
Nonlinear near-field optical effects of the AgO/sub x/-type super-resolution near-field structure (2003)

Super-resolution near-field structure (Super-RENS) was introduced by Tominaga et al. (1998) to perform the task of near-field recording in a more feasible way. Super-RENS has the advantages of simpler recording head design, less mechanic damage, and higher recording speed. Our previous research has shown that the collective effects of the localized surface plasmon and the heterogeneous material structure are responsible for the unusual optical property of the Super-RENS. To further explore the nonlinear near-field optical property of the Super-RENS, we studied direct near-field optical images and two-dimensional finite-difference time-domain (FDTD) simulations of the AgO/sub x/ super-RENS. Our results provide a direct connection between the surface plasmon effects of silver nanoparticles and nonlinear near-field optical property observed in experiments.
Energy recovering static memory (2002)

This paper proposes an energy-recovering (a.k.a. adiabatic) static RAM with a novel driver that reduces power dissipation by efficiently recovering energy from the bit/word line capacitors. Powered by a single-phase sinusoidal power-clock, our SRAM delivers read and write operations with single-cycle latency. To that end, a precharge-low scheme is employed along with a modified sense amplifier design that achieves high efficiency at differential voltages near V/sub SS/. A simple control circuit is used to maintain driver operation in synchrony with the power-clock waveform. Feedback circuitry from the driver output to the control circuit ensures that out driver remains efficient, independent of the access pattern. Our energy recovering SRAM functions correctly while achieving substantial energy savings over a wide range of supply voltages and operating frequencies. Hspice simulations of a simple full-custom adiabatic 256/spl times/256 SRAM, that includes the energy recovering bit/word line drivers, the cell array, and the sense amplifiers, show over 2.6x energy savings at 3V, 300MHz in comparison with its conventional counterpart.
Novel large-pore vanadium alumino- and boro-silicates with BEA structure (1995)

New large-pore vanadium alumino- and boro-silicates with beta (BEA) structure are synthesized; ESR, IR data and catalytic oxidation properties indicate that vanadium is incorporated as V5+ in the lattice.
Replication of Cancellation Orders Using First-Passage Time Theory in Foreign Currency Market (2017)

Our research focuses on the annihilation dynamics of limit orders in a spot foreign currency market for various currency pairs. We analyze the cancellation order distribution conditioned on the normalized distance from the mid-price; where the normalized distance is defined as the final distance divided by the initial distance. To reproduce real data, we introduce two simple models that assume the market price moves randomly and cancellation occurs either after fixed time t or following the Poisson process. Results of our model qualitatively reproduce basic statistical properties of cancellation orders of the data when limit orders are cancelled according to the Poisson process. We briefly discuss implication of our findings in the construction of more detailed microscopic models.
Observations on the optimum time for operative intervention for aortic regurgitation. I. Evaluation of the results of aortic valve replacement in symptomatic patients. (1980)

Fifty consecutive patients undergoing aortic valve replacement for isolated aortic regurgitation were studied prospectively by echocardiography, electrocardiography and cardiac catheterization. Good quality echocardiograms were obtained in 49 of the 50 patients. Left ventricular (LV) dilatation was present in all 49 patients. LV systolic function, as assessed by echocardiographic percent fractional shortening, was normal in many patients but was moderately to severely reduced (less than 25%) in 14 patients (29%). Echocardiographic studies 6 months postoperatively revealed significant reductions in LV end-diastolic dimension (73.8 mm vs 58.7 mm; p less than 0.01), and serial echocardiographic studies early and late after operation revealed that the decrease in LV size had occurred by the time of the early study (8-22 days postoperatively), with little additional change thereafter. Operative deaths occurred in three of the 49 patients (6%). Eight of the 49 patients (16%) died of congestive heart failure (CHF) after hospital discharge at times ranging from 5-43 months after operation. Preoperative echocardiographic measurements of the LV end-systolic dimension and percent fractional shortening were strongly associated (p less than 0.01) with these late CHF deaths. Preoperative LV end-systolic dimension greater than 55 mm and fractional shortening less than 25% identified the high-risk group: nine of 13 patients (69%) in this group died either at operation or subsequently from CHF. In contrast, of 32 patients with LV end-systolic dimension less than 55 mm, only one died at operation and one died late from CHF. Thus, the population at high risk of late death from CHF was identified before operation by echocardiography.
Effect of constitutive laws for two-dimensional membranes on flow-induced capsule deformation (2002)

Three constitutive laws (Skalak et al. 's law extended to area-compressible interfaces, Hooke's law and the Mooney–Rivlin law) commonly used to describe the mechanics of thin membranes are presented and compared. A small-deformation analysis of the tension–deformation relation for uniaxial extension and for isotropic dilatation allows us to establish a correspondence between the individual material parameters of the laws. A large-deformation analysis indicates that the Mooney–Rivlin law is strain softening, whereas the Skalak et al. law is strain hardening for any value of the membrane dilatation modulus. The large deformation of a capsule suspended in hyperbolic pure straining flow is then computed for several membrane constitutive laws. A capsule with a Mooney–Rivlin membrane bursts through the process of continuous elongation, whereas a capsule with a Skalak et al. membrane always reaches a steady state in the range of parameters considered. The small-deformation analysis of a spherical capsule embedded in a linear shear flow is modified to account for the effect of the membrane dilatation modulus.
Driving T Cell Development in the Thymus. (2004)

Abstract Background: Classic reports on lymphocyte development hold that B and T cells develop independently. This concept derives in part from the observation that patients with pure B cell immunodeficiency and hypogammaglobulinemia have a normal thymus and T cell numbers. Our recent findings however challenge this concept. We found that T cell development depends not only on the interaction of T cell precursors with thymic epithelial cells but also on other cells. Here we report that those other cells are B cells. Aims: The purpose of this study was to determine whether B cells drive T cell development and TCR diversification in the thymus. Methods: We compared the number of sub-populations of thymocytes and TCR repertoire diversity in B-cell deficient and B-cell proficient mice and in B cell deficient mice following immunoglobulin (Ig) injections. Total leucocytes numbers were determined with a Coulter counter and numbers of thymocytes sub-populations were calculated by flow cytometry analysis. TCR repertoire diversity was measured by a novel method based on hybridization of TCR Vβ specific cRNA on a gene chip platform. Results: In B-cell deficient mice the number of thymocytes was four times reduced and TCR Vβ chain diversity was up to one million times lower compared with wild type mice. Numbers and diversity were restored by treatment of the mice with gamma globulin (see table). Conclusions: T cell development and diversification is driven by B cells. Mice Number of total thymocytes (mean ± standard deviation) p Value β V TCR diversity of thymocytes (median; min.-max.) p Value C57BL/6 (wild mice) 1.3 x 108 ± 5.1 x 107N=7 4.7 x 106; 1.0 x 105 − 1.1 x 108N=5 JH−/− (B cell immunodeficient mice) 3.1 x 107 ± 1.7 x107N=7 0.002 5.9 x 102; 3.6 x 102 − 1.1 x 103N=5 0.0002 JH−/− treated with Ig 3.9 x 107 ± 1.4 x106N=2 0.20 1.1 x 105; 2.7 x 100 − 7.7 x 105N=4 0.08
Rfid Design Principles, Second Edition (2012)

(radio-frequency identification) is an emerging communication system technology and one of the most rapidly growing segments of today's automatic identification data collection industry. More and more engineers are looking for practical knowledge of the subject so they can realize RFID's performance maximizing benefits. Now, in a new thoroughly revised edition, the Artech House bestseller RFID Design Principles serves as an up-to-date and comprehensive introduction to the subject. The Second Edition features numerous updates and brand new and expanded material on emerging topics such as the medical applications of and new ethical challenges in the field. This cutting-edge book offers professionals a detailed understanding of design essentials, key applications, and important management issues. By comparing with other technologies, this practical resource shows professionals how technology can help them overcome many design challenges and limitations in the field. This hands-on reference distills the latest standards, and examines at work in supply chain management, intelligent buildings, intelligent transportation systems, and tracking animals. is controversial among privacy and consumer advocates, and this book also looks at every angle concerning security, ethics, and protecting consumer data.
Coexistence of TV White Space enabled cognitive wireless access points (2012)

We address the problem of coexistence between neighboring cognitive wireless networks operating in the TV White Space (TVWS). We derive an interference model to predict the range and level of interference generated in the TV bands by portable low-heigh antenna cognitive wireless access points (AP) in suburban and urban areas. Based on our model, we provide an analysis of the spectral availability (SA) for either the scenarios where dynamic frequency selection (DFS) coexistence technique is employed or not. We derive the steps of our analysis and provide, as an illustrative example, the expected coexistence performance of TVWS enabled cognitive wireless APs in Japan. Our analysis demonstrates the intrinsic relationship SA holds with the TVWS channel set as well as statistical information, e.g., house-hold density of wards and cities, Internet penetration, White Space (WS) radio AP market penetration.
Comparison of Serum Prolactin and Thyrotropin Responses to Thyrotropin-Releasing Hormone in Patients with Graves' Ophthalmopathy (1974)

To obtain further information on the mechanism of abnormal serum thyrotropin (TSH) responses to thyrotropin-releasing hormone (TRH) reported recently in patients with Graves' ophthalmopathy, we compared the serum prolactin (PRL) and TSH responses to TRH, 200 fig iv in 13 such patients, 9 of whom were euthyroid and 4 hyperthyroid on the basis of serum free T3 and free T4. Among the 7 patients who demonstrated subnormal serum TSH response to TRH (Group I), 3 were hyperthyroid (Group IA) and 4 euthyroid (Group IB). The net 2-hr PRL secretion response of 401,508 and 321 ng-min in the 3 Group IA patients, respectively, was below the normal range (696–7914). However, the mean (±se) PRL secretion response of the 4 Group IB patients, 1400 ± 221 ng-min, did not differ significantly from the corresponding normal value, 2392 ± 760. Similarly, 1 hyperthyroid (Group IIA) and 5 euthyroid (Group IIB) patients who had supranormal serum TSH responses to TRH demonstrated a clearly normal serum PRL response (2786 ± 702 ng-min, cf. normal N.S.). It is concluded that lactotrophs respond normally to TRH in euthyroid patients with Graves' ophthalmopathy and that the abnormalities in serum TSH response to TRH in these patients are due to mechanism(s) other than a generalized defect in TRH, receptors.
Field emission property improvement of ZnO nanowires coated with amorphous carbon and carbon nitride films (2005)

In this paper, we report an approach to prepare a new type of field emitter made up of ZnO nanowires coated with an amorphous carbon (a-C) or carbon nitride film (a-CNx). The coated ZnO nanowires form coaxial nanocables. The best field emission properties, which showed a very low turn-on electric field of 1.5 V µm−1 and an emission current density of 1 mA cm−2 (enough to produce a luminance of 300 cd m−2 from a VGA FED with a typical high-voltage phosphor screen efficacy of 9 lm W−1) under the field of only 2.5 V µm−1, have been obtained from the a-CNx coated ZnO nanowire field emitter among three kinds of emitters: a-C coated ZnO nanowires, a-CNx coated ZnO nanowires and uncoated ZnO nanowires. Microstructures and crystal configuration were investigated by scanning electron microscopy, x-ray diffraction and transmission electron microscopy. Band edge transition without any significant photoluminescence peak relating to intrinsic defects has been observed by photoluminescence measurement. The superior properties of the field emission are attributed to the low work function of the coated carbon nitride film and good electron transport property of the ZnO nanowires with an extremely sharp tip.
Syntheses of D‐Labelled Oxidative Metabolites of Acrylamide and Acrylonitrile for the Quantification of Their Toxicities in Humans (2008)

Abstract Syntheses of the labelled oxidative metabolites of acrylamide and acrylonitrile – reference compounds for the evaluation of human exposure to important toxicants – are reported. For that, L ‐cystine tert ‐butyl ester was acetylated and the product reductively cleaved to L ‐cysteine tert ‐butyl ester, which reacted with carbamoyl[D 3 ]oxirane (obtained from [D 3 ]acrylonitrile and 30 % aq. H 2 O 2 at pH = 7.0–7.5) and afforded a separable mixture of tert ‐butyl N ‐acetyl‐ S ‐(2‐hydroxy‐2‐carbamoyl[D 3 ]ethyl)cysteinate and tert ‐butyl N ‐acetyl‐ S ‐(1‐carbamoyl‐2‐hydroxy[D 3 ]ethyl)cysteinate (ca. 9:1). Removal of the tert ‐butyl group in these intermediates with aq. HCl gave the final deuterated internal standards with carbamoyl residues. Protection of the secondary hydroxy group in the major intermediate with t BuMe 2 SiCl/imidazole in DMF followed by dehydration of the carbamoyl group (trifluoroacetic anhydride/pyridine in CH 2 Cl 2 ) and stepwise removal of the tert ‐butyl and t BuMe 2 Si protecting groups (TFA, Et 3 SiH,CH 2 Cl 2 ; aq. HF in MeCN) yielded N ‐acetyl‐ S ‐(2‐cyano‐2‐hydroxy[D 3 ]ethyl)cysteine. Monoprotection of [D 4 ]ethylene glycol with t BuMe 2 SiCl and NaH in THF, oxidation to t BuMe 2 SiOCD 2 CDO, conversion to t BuMe 2 SiOCD 2 CD(OH)CN and t BuMe 2 SiOCD 2 CD(OTs)CN followed by nucleophilic substitution of the tosyloxy group with N ‐acetyl‐ L ‐cysteine (MeOD, Et 3 N) and deprotection with 4 M HCl in dioxane resulted in N ‐acetyl‐ S ‐(1‐cyano‐2‐hydroxy[D 3 ]ethyl)cysteine. All transformations (except the last but one) gave the respective products in good yields.(© Wiley‐VCH Verlag GmbH &amp; Co. KGaA, 69451 Weinheim, Germany, 2008)