gebhart/patrepeval huggingface dataset:
Hydrogels based on poly(ethylene oxide) and poly(tetramethylene oxide) or poly(dimethyl siloxane). III. <i>In vivo</i> biocompatibility and biostability (2002)

To investigate the effects of polymer chemistry and topology (linear or graft copolymer) on in vivo biocompatibility and biostability based on cage implant system, various hydrogels, composed of short hydrophilic [polyethylene oxide (PEO)] and hydrophobic block, were prepared by polycondensation reaction. Poly(tetramethylene oxide) (PTMO) or poly(dimethyl siloxane) (PDMS) was chosen as a hydrophobic block because of their wide utilization as a biomaterial. By using the specimens retrieved from rats killed after 1, 2, 3, 5, and 7 weeks' implantation, cellular and material responses were assessed. Most hydrogels showed a comparable value of macrophage density to Pellethane(R), control polymer, whereas they did significantly lower foreign body giant cell (FBGC) density and coverage because of the presence of PEO. However, PEO block length and polymer topology did not affect macrophage adhesion and FBGC formation in our polymer composition. The hydrogel based on PDMS alone showed significantly lower macrophage density and FBGC density than Pellethane(R), indicating that PDMS plays a role in inhibiting cellular adhesion. The results obtained from gel permeation chromatography curve and Fourier transform infrared spectra exhibited that all the polymers were susceptible to oxidative degradation in vivo. Although Pellethane(R) revealed surface degradation by 5 weeks in vivo, hydrogels showed rapid degradation in the bulk within 2 weeks because of the penetration of oxidative chemicals released from phagocytic cells into PEO domain of phase-separated hydrogels. The more significant degradation was observed in the hydrogels with longer PEO block and PTMO as a hydrophobic block instead of PDMS. It was evident that the minor degradation could be achieved by grafting PEO and adopting PDMS as a hydrophobic block in the hydrogel.
Antidiabetic Activity of<i>Nigella sativa</i>. Seed Extract in Cultured Pancreatic β-cells, Skeletal Muscle Cells, and Adipocytes (2008)

The seeds of Nigella sativa L. (NS), a plant of the Runanculaceae family, are used in traditional medicine in North Africa and the Middle East for the treatment of diabetes.Despite widespread use and a number of scientific studies, the target tissues and cellular mechanisms of action of this plant product are not well understood.This study evaluated the effects of NS seed crude ethanol extract on insulin secretion in INS832/13 and TC-tet lines of pancreatic -cells and on glucose disposal by C2C12 skeletal muscle cells and 3T3-L1 adipocytes.An 18-h treatment with NS amplified glucose-stimulated insulin secretion by more than 35% without affecting sensitivity to glucose.NS treatment also accelerated -cell proliferation.An 18-h treatment with NS increased basal glucose uptake by 55% (equivalent to approximately two-fold the effect of 100 nM insulin) in muscle cells and approximately by 400% (equal to the effect of 100 nM insulin) in adipocytes; this effect was perfectly additive to that of insulin in adipocytes.Finally, NS treatment of pre-adipocytes undergoing differentiation accelerated triglyceride accumulation comparably with treatment with 10 M rosiglitazone.It is concluded that the well-documented in vivo antihyperglycemic effects of NS seed extract are attributable to a combination of therapeutically relevant insulinotropic and insulin-like properties.
The Changing Relationship between Headquarters and Cities (2005)

A recent Chicago Fed conference looked at the shifting geography of company headquarters, with a public policy focus on headquarters as a much-desired target of economic development efforts.
Nucleotide sequence of Escherichia coli katE, which encodes catalase HPII (1991)

A 3,466-bp nucleotide sequence containing the katE gene of Escherichia coli has been determined. An open reading frame of 2,259 bp was found and was preceded by a potential ribosome-binding site. The predicted N-terminal sequence agreed with the sequence determined by direct amino acid sequencing, and the predicted direction of transcription was confirmed by expression of the gene cloned in both directions behind a T7 promoter. The start site of transcription was determined to be 127 bp upstream from the start of the open reading frame, and a potential RNA polymerase-binding site similar to a sequence preceding the xthA gene, which is also controlled by the KatF protein, was identified. The predicted sequence of the 753-amino-acid protein was compared with known sequences of other catalases, revealing significant similarity to the shorter catalases, including the residues in the putative active site and residues involved in heme binding.
Heat Shock Transcription Factor 1 Binds Selectively in Vitro to Ku Protein and the Catalytic Subunit of the DNA-dependent Protein Kinase (1997)

Heat shock transcription factor 1 (HSF1) functions as the master regulator of the heat shock response in eukaryotes. We have previously shown that, in addition to its role as a transcription factor, HSF1 stimulates the activity of the DNA-dependent protein kinase (DNA-PK). DNA-PK is composed of two components: a 460-kDa catalytic subunit and a 70- and 86-kDa heterodimeric regulatory component, also known as the Ku protein. We report here that HSF1 binds specifically to each of the two components of DNA-PK. Binding occurs in the absence of DNA. The complex with the Ku protein is stable and forms at a stoichiometry close to unity between the Ku protein heterodimer and the active HSF1 trimer. The binding is blocked by antibodies against HSF1. Our results show that HSF1 also binds directly, but more weakly, to the catalytic subunit of DNA-PK. Both interactions are dependent on a specific region within the HSF1 regulatory domain. This sequence is necessary but not sufficient for HSF1 stimulation of DNA-PK activity. The ability of HSF1 to interact with both components of DNA-PK provides a potential mechanism for the activation of DNA-PK in response to heat and other forms of stress.
Structural studies in aqueous solution of new binuclear lanthanide luminescent peptide conjugates (2008)

The synthesis, NMR and luminescent analysis of a novel polypeptide possessing a sensitising naphthalimide antenna at the amino terminus, and a model compound with a Trp moiety, and their Eu(iii) and Tb(iii) complexes are described.
A four-parameter atomic decomposition of chirplets (1999)

A new four-parameter atomic decomposition of chirplets is developed for compact and precise representation of signals with chirp components. The four-parameter chirplet atom is obtained from the unit Gaussian function by successive applications of scaling, fractional Fourier transform (FRFT), and time-shift and frequency-shift operators. The application of the FRFT operator results in a rotation of the Wigner distribution of the Gaussian in the time-frequency plane by a specified angle. The decomposition is realized by using the matching pursuit algorithm. For this purpose, the four-parameter space is discretized to obtain a small but complete subset in the Hilbert space. A time-frequency distribution (TFD) is developed for clear and readable visualization of the signal components. It is observed that the chirplet decomposition and the related TFD provide more compact and precise representation of signal inner structures compared with the commonly used time-frequency representations.
An overview of the Tactical Secure Voice Cryptographic Interoperability Specification (2010)

The Tactical Secure Voice Working Group was formed by the National Security Agency in 2008 to ensure that modernized tactical secure voice devices will be interoperable across the Department of Defense. The Naval Research Laboratory was tasked by the working group to develop the Tactical Secure Voice Cryptographic Interoperability Specification (TSVCIS), which became an official National Security Agency (NSA) document in July of 2009. The TSVCIS consists of two documents, one classified and the other unclassified. These documents define the voice encoding, encryption, framing, synchronization, key management, and other functions for tactical secure voice and data radio communications. This paper describes the unclassified portion of the TSVCIS and explains some of the improvements over the legacy tactical secure voice systems. It also describes how the modernized secure voice modes can provide even wider benefits in the future.
Molecular characterization of arrestin family members in the malaria vector mosquito, <i>Anopheles gambiae</i> (2003)

Olfaction influences many insect behaviours including mate seeking and host selection. The molecular machinery underlying insect olfactory systems is a G protein-coupled receptor pathway that, in addition to activation, requires adaptation for olfactory sensitivity and discrimination. We have previously identified ARR1 (henceforth AgARR1), a sensory arrestin from the malaria vector mosquito Anopheles gambiae that has been postulated to modulate olfactory adaptation. This report describes three additional arrestin family members including ARR2 (henceforth AgARR2), which is similar to previously characterized insect sensory arrestins and is expressed at significantly higher levels in the antennae of male vs. female A. gambiae mosquitoes. This finding is consistent with the hypothesis that AgARR2 may be important for the regulation of olfactory-driven behaviours particular to male mosquitoes.
Energy efficiency ensured through surface temperature and heat flow studies (1990)

Surface temperature and heat flow measurement is a highly desirable but difficult thing to accomplish. Unlike applications where transducers in protective tubes are immersed in fluids under controlled or known circumstances, surface measurements require sensors to be outside vessels where environmental conditions may affect results. In addition, surface contours and thermal as well as electrical paths between the sensors and the objects of measurement influence output signal integrity. Selection of sensors and mounting techniques both influence measurement system performance.
Image restoration by the method of generalized projections with application to restoration from magnitude (1984)

The method of projections onto convex sets can be used to solve many problems in image restoration, e.g., restoration from phase, spectral extrapolation, and signal recovery in computer-aided tomography. However, image-restoration problems involving nonconvex constraints cannot be handled by the method of projection onto convex sets in a fashion that ensures convergence. The restoration-from-magnitude (RFM) problem is such a case. To handle the RFM as well as other nonconvex constraints, we describe an algorithm known as generalized projections and discuss its properties. When sets are nonconvex, it is possible for the algorithm to exhibit pathological behavior that is never manifest in convex projections. We introduce an error criterion called the summed-distance error (SDE) and show under what circumstances the SDE is a monotonically decreasing function of the number of iterations. Near-optimum performance of the algorithm is achieved by relaxation parameters. Comparisons with other RFM methods are furnished for synthetic imagery.
Pharmacological effects of rosa damascena. (2011)

Rosa damascena mill L., known as Gole Mohammadi in is one of the most important species of Rosaceae family flowers. R. damascena is an ornamental plant and beside perfuming effect, several pharmacological properties including anti-HIV, antibacterial, antioxidant, antitussive, hypnotic, antidiabetic, and relaxant effect on tracheal chains have been reported for this plant. This article is a comprehensive review on pharmacological effects of R. damascena. Online literature searches were performed using Medline, medex, Scopus, and Google Scholar websites backed to 1972 to identify researches about R. damascena. Searches also were done by going through the author's files and the bibliographies of all located papers.
Advances in the Colloidal Synthesis of Two-Dimensional Semiconductor Nanoribbons (2013)

The shape-controlled synthesis of colloidal semiconductor nanocrystals has attracted a lot of interest because of their shape-dependent physical and chemical properties. With the growing understanding of the shape evolution, several successful syntheses of two-dimensional (2D) nanocrystals have been reported. In this review, we focus on the recent advances in the colloidal synthesis of 2D CdSe nanoribbons with a wurtzite structure. 2D lamellar assemblies of CdSe clusters are generated in the early stage of the synthesis, and then they direct the formation of 2D structure. The dense organic layers on the {112̅0} facets significantly stabilize the 2D nanoribbons. The nanoribbons exhibit unique optical properties originating from the strong 1D quantum confinement within their extremely uniform and thin thickness. Interestingly, a large amount of manganese(II) ions can be incorporated into CdSe nanoribbons via a nucleation-controlled doping process. A high doping concentration and the strong confinement effect of the nanoribbons result in enhanced magneto-optical properties that are suitable for spintronic device applications. CdS nanoribbons have a very similar formation pathway, which suggests the cluster-assembled approaches can potentially be extended to various other materials.
Single-Step Formation of Degradable Intracellular Biomolecule Microreactors (2011)

Here we present a single-step all-aqueous approach to encapsulate biomolecules such as enzymes and proteins into stable microreactors. Key in this method is the use of spray-drying of the biomolecules of interest in combination with oppositely charged polyelectrolytes and mannitol as the sacrificial template. Remarkably, upon spray-drying in the presence of polyelectrolyte, mannitol crystallization is suppressed and the obtained amorphous mannitol offers enhanced preservation of the biomolecules’ activity. Moreover, the use of mannitol allows the formation of nanopores within the microparticles upon rehydration of the microparticles in aqueous medium and subsequent dissolution of the mannitol. The oppositely charged polyelectrolytes provide a polymeric framework which stabilizes the microparticles upon rehydration. The versatility of this approach is demonstrated using horseradish peroxidase as the model enzyme and ovalbumin as the model antigen.
Shock-Induced Cubic Silicon Nitride and Its Properties (2002)

The shock‐induced phase transition of Si3N4 has been investigated through recovery technique and Hugoniot measurements. Recovered samples indicates the formation of a cubic spinel (c‐Si3N4) and the yield of c‐Si3N4 increases with increasing the shock pressure and reaches 100% at 63 GPa. Hugoniot measurements have revealed a phase transition above 36 GPa and the associated volume change of about 25%. The shock synthesized c‐Si3N4 is nano crystalline and displays a high‐temperature metastability up to about 1620 K. c‐Si3N4 is one of hard materials based on the measured equation of state. Shock‐synthesized c‐Si3N4 has been characterized by electron microscopy and 29Si magic angle spinning NMR spectroscopy.
A novel control method for single-phase slow switching multilevel rectifiers (2003)

A novel control method for single-phase multilevel rectifiers is proposed to meet harmonic current limiting standards with minimum input filter inductance. Since the proposed rectifier consists of a main power circuit of a diode bridge and two auxiliary semiconductor switches in parallel with the main circuit, it provides several features; high efficiencies, high input power factor, and low EMI. The simulation and the experimental results show that the proposed control method reduces the input filter inductance minimum.
A Study of Efficacy of Ginseng Radix Palva On Osteoporosis In Ovariectomized Rats (2003)

Objectives : The present study has been undertaken to investigate the effects of and Ginseng Radix Palva on osteoporosis in ovariectomized rats. Methods : In this expaiment, the rats were ovariectomihed. Rats were administered by 2 kinds of medicine, Estradiol and Ginseng Radix Palva. The levels of bone mineral density, osteocalcin, ALP, phosphorus, calcium in serum, deoxypyridinoline in urine, calcium, phosphorus, ash weight of bone, body weight and uterus weight were measured. results : The levels of bone mineral density were not significantly increased in comparison with OVX group in Ginseng Radix Palva group. The levels of serum didn't show significant change in comparison with OVX group in Ginseng Radix Palva group. The levels of urine deoxypyridinoline didn't show significant decrease in comparison with OVX group in Ginseng Radix group. The levels of femoral and fibula-tibial ash weight didn't show significant increase in comparison with OVX group in Ginseng Radix Palva group. The levels of femoral and fibula-tibial calcium showed significant increase in comparison with OVX group in Ginseng Radix Palva group. The levels of femoral and fibula-tibial phosphorus showed significant increase in comparison with OVX group in Ginseng Radix Palva group. The levels of body weight didn't show significant changes in comparison with OVX group in Ginseng Radix Palva group. The levels of uterus weight didn't show significant changes in comparison with OVX group in Ginseng Radix Palva group. Conclusions : Reviewing these experimental results, it appears that Ginseng Radix Palva have efficacy on osteoporosis. And further study should be conducted to illustrate in depth the curing osteoporosis.
The clinical presentation of cutaneous angiolipomata and the response to beta-blockade (1988)

Angiolipomata are relatively uncommon benign tumours making up about 10% of all lipomatous lesions examined pathologically in one large series.1 They commonly appear during puberty and are remarkable in that clinically they are often painful, usually presenting with this specific symptom.2 The origin of the pain is unclear but may be produced by the vascular component of the lesion since increased vascularity is associated with this symptom.1 We report three cases of these uncommon tumours illustrating a range of presentations, the last of which has not been previously reported and which may suggest a mechanism of pain production.
AprilTag: A robust and flexible visual fiducial system (2011)

While the use of naturally-occurring features is a central focus of machine perception, artificial features (fiducials) play an important role in creating controllable experiments, ground truthing, and in simplifying the development of systems where perception is not the central objective. We describe a new visual fiducial system that uses a 2D bar code style "tag", allowing full 6 DOF localization of features from a single image. Our system improves upon previous systems, incorporating a fast and robust line detection system, a stronger digital coding system, and greater robustness to occlusion, warping, and lens distortion. While similar in concept to the ARTag system, our method is fully open and the algorithms are documented in detail.
A 100 mJ Q-switched Nd:YAGxYSAG(1−x) Laser at 944.1 nm (2001)

A new laser material, Nd:YAGxYSAG(1−x), has produced efficient Q-switched laser operation with energies exceeding 100 mJ per pulse at 944.1 nm. This represents one of the few lasers to be designed to operate at a specific, user preselected wavelength without the use of intraresonator tuning elements. Material design, Q-switched lasing and single pass amplifier results are presented.
Simple Microdetermination of Kjeldahl Nitrogen in Biological Materials (1958)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSimple Microdetermination of Kjeldahl Nitrogen in Biological MaterialsC. A. LangCite this: Anal. Chem. 1958, 30, 10, 1692–1694Publication Date (Print):October 1, 1958Publication History Published online1 May 2002Published inissue 1 October 1958https://pubs.acs.org/doi/10.1021/ac60142a038https://doi.org/10.1021/ac60142a038research-articleACS PublicationsRequest reuse permissionsArticle Views668Altmetric-Citations472LEARN 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
Pharmacokinetics of new radioiodine-labeled aromatic acids (1974)

In summary, treatment of diaphyseal fractures requires accurate assessment of the injury to rule out concomitant ligamentous injury at the wrist or the elbow. Minimally displaced ulnar fractures can be managed with bracing. Displaced diaphyseal fractures of the radius and ulna should be plated, usually with 3.5-mm compression plates using AO technique. Complications may still occur but can be minimized if strict attention to technique is followed.
Synchronization Control Strategy of Multi-motor System Based on Profibus Network (2007)

With the development of electric driving systems, the synchronization control system of multiple motors has been used widely in many industry fields recently. The research on the synchronized control technique of multiple motors is getting more and more important. This paper focuses on the synchronization control strategy of multi-motor control system based on PROFIBUS fieldbus. In this paper, the development of the synchronization control technique of multi-motor system is summarized. The model structure of synchronization control system of multi-motor based on PROFIBUS-DP fieldbus is proposed. MS (master-slave) communication mode is adopted. Specially, the synchronization control strategy based on this network control system is analyzed and described. It includes four parts. The first, in order to assign intelligently the given speed of each motor which in the slave station, a BP neural network arithmetic controller is set up in the DP master station. The next, in order to realize high precision control to the single motor, an adaptive double mode fuzzy PID arithmetic is adopted in the intelligent slave station. The third, the sync/freeze control method in virtue of PLC system function is adopted when the DP master transfers its command of synchronization execution to its distributed intelligent slave stations. The last, a short step control method of output frequency is adopted for the converter in the process of start and stop of motor to reduce the ill influence of some factors of equipments. It is the trend of development for the synchronization control of multiple motors to combine the technology of fieldbus with the technology of motor driving control. The analysis result of this paper can offer effective reference for the control of congener equipments. It is quite useful for actual application.