gebhart/patrepeval huggingface dataset:
Structural Control of the Photoluminescence of Silole Regioisomers and Their Utility as Sensitive Regiodiscriminating Chemosensors and Efficient Electroluminescent Materials (2005)

We synthesized a group of silole regioisomers 1(x,y), whose photoluminescence varied dramatically with its regiostructure. By internally hindering the intramolecular rotation, we succeeded in creating a novel silole (1(3,4)) that is strongly luminescent in solutions and whose fluorescence quantum yield in acetone is as high as 83%. We revealed that 1(3,4) was a sensitive chemosensor capable of optically discriminating nitroaromatic regioisomers of p-, o-, and m-nitroanilines. Against general belief, crystal formation of 1(2,4) blue-shifted its emission color and boosted its emission efficiency. The light-emitting diode based on the crystal of 1(2,4) emitted a strong blue light (464 nm) in a high current efficiency (5.86 cd/A).
Novel bifunctional macrocyclic chelating agents appended with a pendant-type carboxymethylamino ligand and nitrobenzyl group and stability of the 88YIII complexes (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel bifunctional macrocyclic chelating agents appended with a pendant-type carboxymethylamino ligand and nitrobenzyl group and stability of the 88YIII complexesKazuya Takenouchi, Kenzo Watanabe, Yoshinori Kato, Tohru Koike, and Eiichi KimuraCite this: J. Org. Chem. 1993, 58, 7, 1955–1958Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://pubs.acs.org/doi/10.1021/jo00059a062https://doi.org/10.1021/jo00059a062research-articleACS PublicationsRequest reuse permissionsArticle Views251Altmetric-Citations30LEARN 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-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
Analytical Chemistry of the Manhattan Project (1951)

Our website uses cookies to enhance your experience. By continuing to use our site, or clicking "Continue," you are agreeing to our Cookie Policy | Continue JAMA HomeNew OnlineCurrent IssueFor Authors Podcasts Clinical Reviews Editors' Summary Medical News Author Interviews More Publications JAMA JAMA Network Open JAMA Cardiology JAMA Dermatology JAMA Health Forum JAMA Internal Medicine JAMA Neurology JAMA Oncology JAMA Ophthalmology JAMA Otolaryngology–Head & Neck Surgery JAMA Pediatrics JAMA Psychiatry JAMA Surgery Archives of Neurology & Psychiatry (1919-1959) JN Learning / CMESubscribeJobsInstitutions / LibrariansReprints & Permissions Terms of Use | Privacy Policy | Accessibility Statement 2023 American Medical Association. All Rights Reserved Search All JAMA JAMA Network Open JAMA Cardiology JAMA Dermatology JAMA Forum Archive JAMA Health Forum JAMA Internal Medicine JAMA Neurology JAMA Oncology JAMA Ophthalmology JAMA Otolaryngology–Head & Neck Surgery JAMA Pediatrics JAMA Psychiatry JAMA Surgery Archives of Neurology & Psychiatry Input Search Term Sign In Individual Sign In Sign inCreate an Account Access through your institution Sign In Purchase Options: Buy this article Rent this article Subscribe to the JAMA journal
Genetic Characterization and Immunogenicity of Coli Surface Antigen 4 from Enterotoxigenic <i>Escherichia coli</i> when It Is Expressed in a <i>Shigella</i> Live-Vector Strain (2003)

The genes that encode the enterotoxigenic Escherichia coli (ETEC) CS4 fimbriae, csaA, -B, -C, -E, and -D', were isolated from strain E11881A. The csa operon encodes a 17-kDa major fimbrial subunit (CsaB), a 40-kDa tip-associated protein (CsaE), a 27-kDa chaperone-like protein (CsaA), a 97-kDa usher-like protein (CsaC), and a deleted regulatory protein (CsaD'). The predicted amino acid sequences of the CS4 proteins are highly homologous to structural and assembly proteins of other ETEC fimbriae, including CS1 and CS2, and to CFA/I in particular. The csaA, -B, -C, -E operon was cloned on a stabilized plasmid downstream from an osomotically regulated ompC promoter. pGA2-CS4 directs production of CS4 fimbriae in both E. coli DH5alpha and Shigella flexneri 2a vaccine strain CVD 1204, as detected by Western blot analysis and bacterial agglutination with anti-CS4 immune sera. Electron-microscopic examination of Shigella expressing CS4 confirmed the presence of fimbriae on the bacterial surface. Guinea pigs immunized with CVD 1204(pGA2-CS4) showed serum and mucosal antibody responses to both the Shigella vector and the ETEC fimbria CS4. Among the seven most prevalent fimbrial antigens of human ETEC, CS4 is the last to be cloned and sequenced. These findings pave the way for CS4 to be included in multivalent ETEC vaccines, including an attenuated Shigella live-vector-based ETEC vaccine.
An error analysis for absolute flux density measurements of Cassiopeia A (1976)

An error analysis for absolute flux density measurement of radiosource Cas A is discussed. The lower-bound quadrature-accumulation error for state-of-the-art measurements of the absolute flux density of Cas A around 7 GHz is estimated to be 1.71 percent for 3σ limits. The corresponding practicable error for the careful but not state-of-the-art measurements is estimated to be 4.46 percent for 3σ limits.
A Security Model for Mobile Processes (2008)

Technologies like mobile devices (e.g. PDAs, smartphones, notebooks)and wireless data communication (e.g. GPRS, UMTS, WiFi) have a great potential for the improvement of mobile processes, e.g. by enabling access to time-critical information and preventing media disruptions. But the usage of these technologies leads also to specific challenges, particularly with regard to security and usability. One approach to deal with mobile-specific security concerns is to control access to functions provided by mobile information systems depending on the current location of the user, e.g. a travelling salesman should only be allowed to enter a customer's order when he currently resides at the premises of that customer. A formal model to write down such rules is called "security model". There are already some security models which take the user's location into account when deciding which functions of a system a certain user is allowed to use but they are process-agnostic, i.e. location-restrictions at process level cannot be expressed. In literature also security models for process-aware information system can be found but they don't consider location. In our work we therefore propose a security model for mobile processes based on an elicitation of requirements.
Angiotensin and cell growth (1991)

The possible role of angiotensin II as a growth factor or growth modulator, and its relationship to the development of cardiovascular hypertrophy as an initiating event of the vicious circle in organ damage, is an area of intensive research at the present time. The stimulatory effects of angiotensin II on certain oncogenes has opened up new vistas and novel methodological approaches which were previously more commonly used in basic cell biology and cancer research
Large-Field-of-View Image-Intensifier Gamma-Camera Detectors Using a Silicon X y Scintillation Localizer (1981)

Two years ago, a gamma camera detector, consisting of a 34 cm input field image intensifier coupled to a scintillator crystal at the input and to a silicon localizer at the output, was built and tested at Thomson-CSF. Snce that time the 34-cm model has been further developed, and a 40 cm model using an improved silicon localizer has been built and tested. This paper discusses the performances of the two cameras, and explains how the localizer output signal is processed to obtain gain uniformity and low geometrical distortion.
Evaluation of the Performance of Intelligent Spray Networks Based On Fuzzy Logic (2012)

Considering the ever increasing advances in technology, especially in the field of IT, It is felt necessary to approach more correctly the question of using pesticides at the suitable time and in a scientific way; because it is observed that, due to lack of necessary knowledge in deciding the type, the amount, or the application time of pesticides, using pesticides not only does not solve problems but causes irreparable environmental and economic damages as well. Therefore, in this article we tackle the default implementation and mechanization of the process of controlling pests, one of the methods of which is the use of intelligent spray using the fuzzy logic. In this method, based on the prevailing conditions in the field, it is divided into several parts so as to protect the environment, to economize in the use of pesticides, and to avoid spraying the parts of the field that are not infested with pests; and sensors sensitive to the pests present are used so that fuzzy logic can be employed to decide what types of pesticides and how much of them are to be used.
Exogenously applied sulphate as a tool to investigate transport and reduction of chromate in the duckweed <i>Spirodela polyrhiza</i> (2004)

ABSTRACT The accumulation of chromium in Spirodela polyrhiza was investigated in the presence and absence of exogenously applied sulphate. Precultivation (10 d) at minimum sulphate concentration (0.013 m m versus 1 m m in controls) enhanced the rate of chromium accumulation. This effect was caused by the increased number of sulphate transporters which transport chromate into cells. Chromate and sulphate compete for the available sulphate transporters. The kinetics of reduction Cr(VI)→Cr(V) was investigated by l ‐band electron paramagnetic resonance (EPR) spectroscopy. The kinetic model developed previously (Appenroth et al ., Journal of Inorganic Biochemistry 78, 235–242, 2000) was refined and extended to include chromate transport and reduction in the presence of competing ions. The following conclusions were drawn from the fitting procedure: without simultaneously applied sulphate, the rate constant of Cr(VI) transport from apoplast into plant cells and the rate constant of Cr(VI) to Cr(V) reduction within the apoplast are comparable (7.0 versus 5.7 h −1 ) demonstrating that these two processes are competing. Moreover, the rate constant of reduction Cr(V)→Cr(III) is much lower within cells than in apoplast (0.39 versus 7.0 h −1 ) showing that Cr(V) is stabilized in the symplast. The rate of transport of Cr(VI) into plant cells is at least one order of magnitude higher than that of Cr(V) or Cr(III). The treatment with sulphate (10 m m ) decreases the rate constant of the transport of Cr(VI) into cells (2.0 h −1 ) confirming the competition of chromate and sulphate for the same transporters. Simultaneously, the rate constant of Cr(V)→Cr(III) reduction is increased in the apoplast (by the factor of 3) and decreased in the symplast (by the factor of 5). Treatment with higher sulphate concentrations (100 m m ) increases the accumulation of chromium by enhancing the rate constant of Cr(VI) transport into cells leaving other processes essentially unchanged. We suggest that 100 m m sulphate opens a new pathway for chromate transport into cells.
Radiation from fast and slow traveling waves (2008)

This article presents an overview of the radiation from fast and slow traveling waves. The goal is to describe the mechanisms that give rise to the radiation in a leaky-wave antenna (LWA). An infinite aperture distribution and line-source assumptions will be used to convey the concepts. In addition, the relationship between the leaky-wave antenna and other types of traveling wave antennas will be elucidated.
TWO – DIMENSIONAL CODES ON MOBILE DEVICES AND THE DEVELOPMENT OF THE PLATFORM (2011)

In the last times, the mobile terminals have experienced an accelerated technological development. This evolution has provided numerous advances in presentation and interactivity in general and it has given rise to the generation of numerous applications for it. Following this line; this article shows how to incorporate on mobile terminals a simple interaction with the environment across the technological successor of the bar codes: the two-dimensional codes. We will use three basic elements-camera quality, growth in data traffic and increased bandwidth in mobile phones-to create a platform that provides to the user an easy and useful way of obtaining information multimedia that improves his relation with the environment. We will look for a complete and global development of the system, that is, the generation of the two-dimensional code; his interaction with the platform and final obtaining of the information in the terminal.
Construct Synthetic Gene Encoding Artificial Spider Dragline Silk Protein and its Expression in Milk of Transgenic Mice (2007)

Based on the known partial cDNA sequence of dragline silk protein an artificial gene monomer, a 360 bp sequence, was designed and polymerized to encode an analog of dragline silk protein. Six tandem copies of monomer were cloned into pBC1 vector and microinjected into the pronuclei of fertilized Kunming White eggs. Transgenic mice were screened by Polymerase Chain Reaction (PCR) and Southern blot which revealed that 10 mice (5 male, 5 female) among 58 mice were transgenic positive. Milk of five F0 mice and eight F1 mice was analyzed by Western blot, and two F0 mice and seven F1 mice expressed recombinant dragline silk protein. In transgenic mice milk a maximum of concentration of recombinant dragline silk protein was 11.7 mg/L by radioimmunoassay.
Randomized, Double-blind Placebo-controlled Trial of Coenzyme Q10 in Chronic Renal Failure: Discovery of a New Role (2000)

Purpose: Antioxidant vitamin and coenzyme Q10 deficiency as well as oxidative damage have been observed in patients with chronic renal failure. In this study, we examine whether treatment with coenzyme Q10 can improve renal function in chronic renal failure. Design: Randomized, double-blind, placebo-controlled trial. Materials and Methods: Subjects ( n = 21) with available records of chronic renal failure on dialysis or not on dialysis (serum creatinine 5 mg dl -1 or above) were randomly divided into intervention ( n = 11) and control ( n = 10) groups by blindly selecting a card. The intervention group was administered coenzyme Q10 (60 mg thrice daily) and the placebo group inert fibre (cellulose, 1 g thrice daily) for a period of 4 weeks. Results: The coenzyme Q10 group showed a significant reduction in serum creatinine, blood urea and a significant increase in creatinine clearance and urine output compared to the placebo group after the 4-week trial period, while the baseline values of these parameters were comparable between the two groups. The frequency of dialysis and the proportion of subjects on dialysis were comparable at baseline. However, after 4 weeks, the subjects on dialysis were significantly fewer in the coenzyme Q10 group than the placebo group (36.2% vs. 90.0% , p < 0.02). Plasma levels of antioxidant vitamins A, E and C and beta-carotene showed a significant increase whereas thiobarbituric acid reactive substances, diene conjugates and malondialdehyde showed a significant reduction in the coenzyme Q10 group compared to the control group. Conclusions: Treatment with coenzyme Q10 improves renal function in patients with chronic renal failure and decreases the need for dialysis in patients on chronic dialysis. Long-term follow-up in a large number of patients would be necessary to confirm these results.
Regulation of the<i>Bacillus subtilis fur</i>and<i>perR</i>Genes by PerR: Not All Members of the PerR Regulon Are Peroxide Inducible (2002)

PerR is a ferric uptake repressor (Fur) homolog that functions as the central regulator of the inducible peroxide stress response in Bacillus subtilis. PerR has been previously demonstrated to regulate the mrgA, katA, ahpCF, hemAXCDBL, and zosA genes. We now demonstrate that PerR also mediates both the repression of its own gene and that of fur. Whereas PerR-mediated repression of most target genes can be elicited by either manganese or iron, repression of perR and fur is selective for manganese. Genetic studies indicate that repression of PerR regulon genes by either manganese or iron requires PerR and is generally independent of Fur. Indeed, in a fur mutant, iron-mediated repression is enhanced. Unexpectedly, repression of the fur gene by manganese appears to require both PerR and Fur, but only PerR binds to the fur regulatory region in vitro. The fur mutation appears to act indirectly by affecting cellular metal ion pools and thereby affecting PerR-mediated repression. While many components of the perR regulon are strongly induced by hydrogen peroxide, little, if any, induction of fur and perR could be demonstrated. Thus, not all components of the PerR regulon are components of the peroxide stimulon. We suggest that PerR exists in distinct metallated forms that differ in DNA target selectivity and in sensitivity to oxidation. This model is supported by the observation that the metal ion composition of the growth medium can greatly influence the transcriptional response of the various PerR regulon genes to hydrogen peroxide.
Global static and dynamic car body stiffness based on a single experimental modal analysis test (2010)

Global car body stiffness is an important design attribute in vehicle design. Therefore accurate characterization of this stiffness is needed. The current industrial method for static stiffness determination has several downsides, amongst others its time consuming set-up preparation. Dynamic characterization by means of modal analysis on the other hand has high repeatability and a less time consuming set-up preparation. This paper describes and experimentally validates the industrial implementation of a method to overcome the downsides of the classic static test by determining both global static, as well as dynamic stiffness based on a single modal analysis test. The method combines several techniques available in literature. Theory behind the method is elaborated, simulation tests show the potential of the method and finally experimental validation on a full body-in-white proves industrial applicability of the proposed technique.
Unique architecture and concept for high-performance organic transistors (2004)

We report an organic transistor with a vertically stack structure, which consists of a layer-by-layer active cell (drain/organics/source) on top of a capacitor cell (source/dielectrics/gate); the middle source electrode is shared by the capacitor cell and active cell. Three unique characteristics of this transistor, (a) its very thin and rough middle source electrode; (b) its capacitor cell with high charge-storage capability, allow the active cell to be influenced when the gate is biased; and (c) the large cross-section area and small distance between the source and the drain allow current flowing between the source and drain electrodes. Devices have been fabricated by thermal evaporation with the source-drain current well modulated by the gate potential. We have achieved organic transistors with low working voltage (less than 5V) and high current output (up to 10mA or 4A∕cm2) and an ON/OFF ratio of 4×106. A model is proposed for the device operation mechanism. The demonstrated device with its enhanced operating characteristics may open directions for organic transistors and their applications.
Application performance assurance using end-to-end user level monitoring (2003)

A new measure of performance, which uses both application integrity and traditional network response time, is proposed. Modern networked application services rely on a stack of network protocols and a host of other services many of which cross-organizational and corporate boundaries. We point out that traditional software quality assurance techniques don't scale up for post-deployment integrity checks for such applications and services. A new methodology to do non-stop post-production monitoring of networked application services for transactional integrity and time delay measurement is proposed. Specifically we describe the Telcordia/spl trade/ Application Assurance System, which we have created for measuring real-time performance of web-based applications used in commercial settings. The system measures both post-production application integrity and time delay. The measurements are carried out by sending synthetic end-user transactions and analyzing the responses. Statistical models for analyzing the data using single monitoring site as well as multiple monitoring sites are described. Creating synthetic end-user transactions is crucial for our method. The paper presents a method for generation of 'highly efficient' end-user transactions from a graphical model of the functionality of the system. Highly efficient transactions are generated using combinatorial designs. The graphical model is incrementally created using a recorder. We give several empirical examples of efficacy of this system and uses for finding performance problems.
Inversion of short-time fourier transform magnitude spectrograms with adaptive window lengths (2009)

In this paper, we extend the real-time iterative spectrogram inversion method (RTISI) for generating a time-domain audio signal from a magnitude spectrogram such that it can handle changing spectrogram window lengths. For each desired window length, we use a separate buffer structure and synchronize the buffers each time the window length changes. This way, the proposed method helps to improve the time/frequency-resolution trade-off for algorithms that operate on magnitude-only spectra.
Fabrication of Optical Fiber Preform by CIP Forming Technique (1996)

A new hybridized process for preparing optical fibers has been developed. The process consists of overcladding a VAD-derived core rod with commercial silica powder by cold isostatic pressing (CIP) technique. Single-mode optical fibers were fabricated by the process which used the core rod having a ratio of core to cladding radius of 3 and silica powder of average particle diameter of 10μm. The losses were 0.36dB/km at 1.3μm and 0.23dB/km at 1.55μm. The points for the process are following; (1) Silica powder was granulated by spray dryer from slurry containing poly-vinyl-alcohol (PVA) to be packed uniformly into a rubber mold for CIP forming. (2) To prevent the core rod from breaking in the compression, a rubber mold with a structure in which both ends of the core rod were pressed by hydrostatic pressure was used. This CIP process provided the hybridized soot preform which consisted of the core rod and a porous body around it from silica powder in one step. (3) It was very important that 10μm silica powder was used because it was easy to purify into high-purity glass. (4) To remove PVA which was added in granulating, heat treatment was carried out at 500°C in an atmosphere of dry air. The heat-treated porous body containing 25ppm carbon was consolidated into the overcladding glass for low-loss optical fibers. Further, a relation between the pore diameter and purification of the porous body was studied. As a result, pores with more than 0.2μm diameter were presumed to be required for making high-purity glass by chlorine purification.