gebhart/patrepeval huggingface dataset:
The Preparation of Other Borohydrides by Metathetical Reactions Utilizing the Alkali Metal Borohydrides<sup>1</sup> (1953)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Preparation of Other Borohydrides by Metathetical Reactions Utilizing the Alkali Metal Borohydrides1H. I. Schlesinger, Herbert C. Brown, and Earl K. HydeCite this: J. Am. Chem. Soc. 1953, 75, 1, 209–213Publication Date (Print):January 1, 1953Publication History Published online1 May 2002Published inissue 1 January 1953https://pubs.acs.org/doi/10.1021/ja01097a055https://doi.org/10.1021/ja01097a055research-articleACS PublicationsRequest reuse permissionsArticle Views987Altmetric-Citations104LEARN 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
[Expression of a tumor related gene chp2 in leukemia cells]. (2008)

The purpose of this study was to investigate the expression feature of a human tumor related gene chp2 in leukemia primary cells and leukemia cell lines, real-time quantitative PCR (RQ-PCR) was performed to detect the expression level of chp2 gene in peripheral blood mononuclear cells from 10 healthy individuals (as control) and 24 cases of leukemia, and in 4 kinds of leukemia cell lines. The results showed that the detection rate of chp2 gene in 10 normal controls was 80%, positive expression was (0.744 +/- 0.682) x 10(5) cps/microl. The expression levels of chp2 mRNA leukemia primary cells and leukemia cell lines were significantly higher than that in the normal control (p < 0.05). The expression levels of chp2 mRNA were higher in AML cells (7 cases), CML cells (6 cases), ALL cells (7 cases) and CLL cells (4 cases), and their expression levels were (11.637 +/- 5.588), (6.122 +/- 3.785), (4.262 +/- 2.561) and (3.434 +/- 1.974) x 10(5) cps/microl respectively. Gene chp2 positively expressed in four kinds of leukemia cell lines, and the expression levels in K562 cells, Jurkat cells, HL-60 cells and M07e cells were (5.243 +/- 1.852), (4.463 +/- 1.621), (4.137 +/- 1.837) and (2.578 +/- 1.137) x 10(6) cps/microl respectively. The expression level in leukemia cell lines was higher than that in primary cells. It is concluded that the human tumor related gene chp2 expression in leukemia primary cells and leukemia cell lines significantly increase, which may play an important role in growth process of leukemia cells.
Dual-polarised dielectric resonator antenna with high isolation and low cross-polarisation (2009)

A novel, dual-polarised dielectric resonator antenna with high-isolation and low cross-polarisation is presented using a hybrid feeding technique. Port isolation of 35.9 dB and a cross-polarisation level of −34 dB are measured. The impedance bandwidth of return loss less than −10 dB is 440 MHz (7.9%) with a centre frequency of 5.7 GHz. Since its feeding mechanism is symmetric, a symmetric radiation pattern is also achieved. It is suitable for the application of synthesis aperture radar and some wireless systems.
Associations between Drugs Administered during Pregnancy and Congenital Abnormalities of the Fetus (1971)

In a retrospective study to compare the drug consumption during pregnancy of mothers of infants with congenital abnormalities and of those without, over 97% of 1,369 mothers took prescribed drugs and 65% self-administered drugs. Significantly more mothers of infants with congenital abnormalities took aspirin, antacids, dextroamphetamine, phenobarbitone, sodium amytal, other barbiturates, cough medicines, iron, sulphonamides, and nicotinamide than mothers in the control group. However, most mothers taking analgesics, antacids, appetite suppressants, barbiturates, cough medicines, iron, sulphonamides, and vitamins produced normal infants. Any teratogenic effect of these drugs is therefore one of low potency. On the other hand, deficiencies such as those of ascorbic acid and folic acid may have a teratogenic effect. There is need for caution in presuming teratogenic effects on the basis of the associations shown here. During pregnancy, however, it would appear wise to avoid the administration of any drug which carries a suspicion of teratogenicity unless that drug is specifically indicated, and self-medication with common household remedies such as aspirin and antacids should be avoided. These recommendations would also apply to any woman of childbearing age in whom conception is likely.
Self‐Assembling, Bioinspired Wax Crystalline Surfaces with Time‐Dependent Wettability (2011)

Abstract One of the most fascinating properties of materials in nature is the superhydrophobic and self‐cleaning capabilities of different plant surfaces. This is usually achieved by the hydrophobic cuticles that are made of cutin and contain wax crystals both within them and on their surfaces. Here, bioinspired n ‐hexatriacontane wax films are deposited via thermal evaporation and it is shown that the surface evolves in time via self‐assembly. This leads to a dramatic change in the wetting properties with a transition from hydrophobic to superhydrophobic characteristics, which takes place within several days at room temperature. This phenomenon is investigated and strain‐induced recrystallization is proposed to be the mechanism for it. This work could become the basis for the inspiration and production of tuned, time‐dependant, temperature‐sensitive, variable‐wettability surfaces.
Single-exposure quantitative phase imaging in color-coded LED microscopy (2017)

We demonstrate single-shot quantitative phase imaging (QPI) in a platform of color-coded LED microscopy (cLEDscope). The light source in a conventional microscope is replaced by a circular LED pattern that is trisected into subregions with equal area, assigned to red, green, and blue colors. Image acquisition with a color image sensor and subsequent computation based on weak object transfer functions allow for the QPI of a transparent specimen. We also provide a correction method for color-leakage, which may be encountered in implementing our method with consumer-grade LEDs and image sensors. Most commercially available LEDs and image sensors do not provide spectrally isolated emissions and pixel responses, generating significant error in phase estimation in our method. We describe the correction scheme for this color-leakage issue, and demonstrate improved phase measurement accuracy. The computational model and single-exposure QPI capability of our method are presented by showing images of calibrated phase samples and cellular specimens.
Optimizing synchronization in multiprocessor DSP systems (1997)

This paper is concerned with multiprocessor implementations of embedded applications specified as iterative dataflow programs in which synchronization overhead can be significant. We develop techniques to alleviate this overhead by determining a minimal set of processor synchronizations that are essential for correct execution. Our study is based in the context of self-timed execution of iterative dataflow programs. An iterative dataflow program consists of a dataflow representation of the body of a loop that is to be iterated an indefinite number of times; dataflow programming in this form has been studied and applied extensively, particularly in the context of signal processing software. Self-timed execution refers to a combined compile-time/run-time scheduling strategy in which processors synchronize with one another based only on interprocessor communication requirements, and thus, synchronization of processors at the end of each loop iteration does not generally occur. We introduce a new graph-theoretic framework based on a data structure called the synchronization graph for analyzing and optimizing synchronization overhead in self-timed, iterative dataflow programs. We show that the comprehensive techniques that have been developed for removing redundant synchronizations in noniterative programs can be extended in this framework to optimally remove redundant synchronizations in our context. We also present an optimization that converts a feedforward dataflow graph into a strongly connected graph in such a way as to reduce synchronization overhead without slowing down execution.
Prenatal diagnosis of brain abnormalities in Wolf–Hirschhorn (4p‐) syndrome (2002)

Subtle abnormalities on ultrasound may suggest a chromosomal problem. Standard cytogenetics cannot always demonstrate a microdeletion. High-resolution banding and molecular analysis can help to confirm the diagnosis.
<b>The Base-Induced Pyrolysis of Tosylhydrazones of α,β-Unsaturated Aldehydes and Ketones. A Convenient Synthesis of Some Alkylcyclopropenes</b> (1963)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Base-Induced Pyrolysis of Tosylhydrazones of α,β-Unsaturated Aldehydes and Ketones. A Convenient Synthesis of Some AlkylcyclopropenesGerhard L. Closs, Liselotte E. Closs, and Walter A. BollCite this: J. Am. Chem. Soc. 1963, 85, 23, 3796–3800Publication Date (Print):December 1, 1963Publication History Published online1 May 2002Published inissue 1 December 1963https://pubs.acs.org/doi/10.1021/ja00906a018https://doi.org/10.1021/ja00906a018research-articleACS PublicationsRequest reuse permissionsArticle Views982Altmetric-Citations133LEARN 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
Behavior learning of a face robot using human natural instruction (2003)

In this paper, based on the concept "learning oriented interaction " (LOI) as a basic strategy of organizing the sensorymotor coordination for the interacting robot, we first point out the problems of the conventional approach to realize LOI, i.e. the "direct instruction method". Then we propose an alternative approach, i.e. the "natural instruction method", and we conduct the experiments using a face robot system in order to evaluate the effectiveness of the new method in real robot-interaction with human. We explain briefly the concept of LOI and point out its problems.
O(<sup>1</sup><i>S</i>) 557.7 nm and O(<sup>1</sup><i>D</i>) 630 nm emissions in shuttle thruster plumes (1995)

Radiation resulting from interaction between the effluent cloud of a space shuttle thruster and the ambient atmosphere was observed with a spectrograph aboard the shuttle. The spectral measurements were made between 400 and 800 nm with a resolution of 3 nm. The primary emissions are identified as NO 2 , HNO, O( 1 D ), and O( 1 S ). These are the first observations of O( 1 S ) emission in the shuttle plume. These data are compared with previous measurements, and possible excitation mechanisms are discussed. The results are also compared with a Monte Carlo simulation of thruster plume‐atmosphere interaction radiation.
Strategy for comprehensive identification of human <i>N</i>‐myristoylated proteins using an insect cell‐free protein synthesis system (2010)

To establish a strategy for the comprehensive identification of human N-myristoylated proteins, the susceptibility of human cDNA clones to protein N-myristoylation was evaluated by metabolic labeling and MS analyses of proteins expressed in an insect cell-free protein synthesis system. One-hundred-and-forty-one cDNA clones with N-terminal Met-Gly motifs were selected as potential candidates from approximately 2000 Kazusa ORFeome project human cDNA clones, and their susceptibility to protein N-myristoylation was evaluated using fusion proteins, in which the N-terminal ten amino acid residues were fused to an epitope-tagged model protein. As a result, the products of 29 out of 141 cDNA clones were found to be effectively N-myristoylated. The metabolic labeling experiments both in an insect cell-free protein synthesis system and in the transfected COS-1 cells using full-length cDNA revealed that 27 out of 29 proteins were in fact N-myristoylated. Database searches with these 27 cDNA clones revealed that 18 out of 27 proteins are novel N-myristoylated proteins that have not been reported previously to be N-myristoylated, indicating that this strategy is useful for the comprehensive identification of human N-myristoylated proteins from human cDNA resources.
Acute Renal Failure During a Trial of SpinalCord Stimulation: Theories as to a PossibleConnection (2008)

The development of the episode of acute renal failure may have been influenced by the secondary effects of spinal cord stimulation. Since acute renal failure has never been associated with the use of spinal cord stimulation, this singular example does not by itself demonstrate a relationship. However, if future episodes are seen, a link between the 2 events could be drawn. For now, it is not clear if the development of this patient's acute renal failure could, in part, be attributed to the use of the spinal cord stimulator or if it was merely coincidental in nature. We do feel it is useful for the clinician to understand the pathophysiologic changes associated with spinal cord stimulation and to see how, at least in theory, there could be a connection.
New Constitutive Vectors: Useful Genetic Engineering Tools for Biocatalysis (2013)

Constitutive vectors are useful tools for genetic engineering. Two constitutive vectors with high levels of expression and broad host ranges were developed and used in a range of Pseudomonas hosts. The vectors showed superior characteristics compared to the inducible vectors as well as the potential to be used as improved genetic tools for biocatalysis.
Theoretical and experimental investigations of novel fiber lasers. (1996)

Ultrafast science has historically been concerned with the areas of spectroscopy and the study of dynamic processes in the sciences and engineering. With the recent advent of compact, economical sources of ultrashort optical pulses, many potential applications have emerged in the fields of communications, medicine, metrology, and industrial processing. In this thesis, fiber lasers are explored as compact sources of ultra short optical pulses. Several passive modelocking schemes in fiber lasers have been reported. Unfortunately, when implemented in the negative group velocity regime, modelocked fiber lasers are plagued with a multiple-pulsing instability which limits them to low output pulse energy. In this work, a modelocking scheme based on a nonlinear directional coupler is proposed and analyzed. This laser, when embodied as a dual-core fiber, is shown to be immune to the multiple-pulsing instability and produces sub-100-fs pulses in the negative group velocity regime. In the presence of gain saturation, the laser produces 100-fs pulses and can evolve to steady-state from initial noise input when operated under the right conditions. The dual-core fiber laser even produces nanojoule, picosecond when implemented in the regime of positive group velocity dispersion. These pulses are chirped which allows for further compression down to 160 fs. Using a similar model, the first theoretical analysis of passive modelocking in birefringent fiber is performed. The results of the model (45 fs) are in excellent agreement with experimental results (38 fs). Additional wavelengths are also needed if fiber lasers are to be considered viable as compact sources of ultrashort pulses. To this end, a diode-pumped thulium-doped fluorozirconate fiber laser which operates near 800 nm is examined. The upconversion process is shown to be due to avalanche absorption of the pump. By constructing a compact, diode-pumped laser from an unoptimized sample of this fiber, this technique is shown to be a promising candidate for an 800-nm fiber laser. The study is concluded with research and development of a chirped pulse amplification system based on ytterbium doped fiber. Both the small and large signal gains are measured. When configured as a two-stage amplifier, this system amplifies the entire bandwidth of 100-fs pulses to the 10-$\mu$J level. These pulses are the most energetic, to date, produced from a standard single-mode fiber amplifier.
Multi‐parametric MRI characterization of healthy human thigh muscles at 3.0 T – relaxation, magnetization transfer, fat/water, and diffusion tensor imaging (2014)

Muscle diseases commonly have clinical presentations of inflammation, fat infiltration, fibrosis, and atrophy. However, the results of existing laboratory tests and clinical presentations are not well correlated. Advanced quantitative MRI techniques may allow the assessment of myo-pathological changes in a sensitive and objective manner. To progress towards this goal, an array of quantitative MRI protocols was implemented for human thigh muscles; their reproducibility was assessed; and the statistical relationships among parameters were determined. These quantitative methods included fat/water imaging, multiple spin-echo T2 imaging (with and without fat signal suppression, FS), selective inversion recovery for T1 and quantitative magnetization transfer (qMT) imaging (with and without FS), and diffusion tensor imaging. Data were acquired at 3.0 T from nine healthy subjects. To assess the repeatability of each method, the subjects were re-imaged an average of 35 days later. Pre-testing lifestyle restrictions were applied to standardize physiological conditions across scans. Strong between-day intra-class correlations were observed in all quantitative indices except for the macromolecular-to-free water pool size ratio (PSR) with FS, a metric derived from qMT data. Two-way analysis of variance revealed no significant between-day differences in the mean values for any parameter estimate. The repeatability was further assessed with Bland-Altman plots, and low repeatability coefficients were obtained for all parameters. Among-muscle differences in the quantitative MRI indices and inter-class correlations among the parameters were identified. There were inverse relationships between fractional anisotropy (FA) and the second eigenvalue, the third eigenvalue, and the standard deviation of the first eigenvector. The FA was positively related to the PSR, while the other diffusion indices were inversely related to the PSR. These findings support the use of these T1 , T2 , fat/water, and DTI protocols for characterizing skeletal muscle using MRI. Moreover, the data support the existence of a common biophysical mechanism, water content, as a source of variation in these parameters.
Synthesis and characterization of polyvinyl alcohol hydrogel (2010)

Ability of the hydrogels to absorb and retain fluids and bioactive materials made them the centre of attraction for researchers. Physiochemical properties (e.g. swelling, ionic strength etc) of a hydrogel can be changed by varying the concentration of crosslinker and by crosslinker itself. These changes are exploited for various purposes such as controlled and sustained drug delivery systems, biosensors etc. We have crosslinked polyvinyl alcohol chemically with different acid crosslinkers such as maleic acid, maleic anhydride, citric acid and tartaric acid. Effect of crosslinking ratio on swelling of hydrogels in different pH solution including water has been studied. Besides that FTIR of the hydrogels reveal the chemical changes during crosslinking. Biocompatibility of hydrogels was evaluated through MTT assay.
ZnO, ZnMnO and ZnCoO films grown by atomic layer deposition (2012)

Despite many efforts the origin of a ferromagnetic (FM) response in ZnMnO and ZnCoO is still not clear. Magnetic investigations of our samples, not discussed here, show that the room temperature FM response is observed only in alloys with a non-uniform Mn or Co distribution. Thus, the control of their distribution is crucial for explanation of contradicted magnetic properties of ZnCoO and ZnMnO reported till now. In the present review we discuss advantages of the Atomic Layer Deposition (ALD) growth method, which enables us to control uniformity of ZnMnO and ZnCoO alloys. Properties of ZnO, ZnMnO and ZnCoO films grown by the ALD are discussed.
Elevated D-dimer Level in the Differential Diagnosis of Venous Malformations (2009)

Elevated D-dimer level is highly specific for VMs (pure, combined, or syndromic), and therefore this easy and inexpensive biomarker test should become part of the clinical evaluation of vascular anomalies. It can detect hidden VMs and help differentiate glomuvenous malformation (normal D-dimer levels) from other multifocal venous lesions. Elevated D-dimer level also differentiates a VM from a lymphatic malformation. Moreover, slow-flow Klippel-Trenaunay syndrome (capillaro-lymphatico-venous malformation with limb hypertrophy) can be distinguished from fast-flow Parkes Weber syndrome (capillary malformation with underlying multiple microfistulas and limb hypertrophy). For these reasons, D-dimer level measurement is a useful complementary tool for diagnosing vascular anomalies in everyday practice.
Artificial Bandwidth Extension of Telephony Speech by Data Hiding (2005)

The current public switched telephone network (PSTN) is only able to deliver analog signals in a relatively narrow frequency band, about 300-3400 Hz. Such a bandwidth is so small that the intelligibility of speech frequently suffers from poor subjective quality. In order to improve the voice quality and intelligibility, it is proposed to use a data hiding technique to extend the PSTN channel bandwidth artificially. That is, the higher frequency components beyond the PSTN bandwidth are encoded and imperceptibly embedded into the narrowband signal. When the hidden signal is extracted at the receiver, wideband speech can be reconstructed with better perceptual quality. The advantage of the proposed scheme lies in that it is fully compatible with conventional end-user equipment, e.g., a plain ordinary telephone set (POTS). Experimental results show that the proposed scheme has a better performance than conventional bandwidth extension methods with speaker-independent training.