gebhart/patrepeval huggingface dataset:
Synthesis and crosslinking of a series of dimeric liquid‐crystalline diglycidylester compounds containing imine groups (2002)

Abstract We used readily available commercial reagents and well‐known procedures to synthesize a series of aromatic imine mesogenic diglycidylester compounds with dimeric architectures. The compounds obtained were characterized by spectroscopic techniques. Their liquid‐crystalline behavior was examined by differential scanning calorimetry, hot‐stage polarized optical microscopy (POM), and wide‐angle X‐ray scattering (WAXS) and related to the different structures that varied in the length of the central spacer. All the compounds exhibited nematic mesophases with the exception of the dimer with a three‐methylene central spacer that did not reveal liquid‐crystalline character. We investigated the crosslinking of the synthesized compounds and obtained liquid‐crystalline thermosets (LCTs) with several primary aromatic diamines in stoichiometric ratios or a tertiary amine as a catalyst. The curing processes were measured by calorimetry, and the thermal stability of the LCTs was evaluated by thermogravimetry. The ordered character of the LCTs was confirmed by POM and WAXS. Finally, the mechanical characterization of the LCTs obtained was examined by dynamic mechanical thermal analysis. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 4344–4356, 2002
Investigation of Robustness Capability of −730 V P-Channel Vertical SiC Power MOSFET for Complementary Inverter Applications (2017)

In this paper, a p-channel vertical 4H-silicon carbide (SiC) MOSFET (SiC p-MOSFET) has been fabricated successfully for the first time as a potential candidate for the complementary inverter application. The static characteristics and the robustness, including short circuit and avalanche capabilities of the p-MOSFET, are experimentally tested. Moreover, the comparison between the p-MOSFET and similar rating n-MOSFET is carried out. The short-circuit capability is 15% higher than that of the n-channel MOSFET. Furthermore, this paper also provides the physical insights into the failure mechanism during the short-circuit transient of the p- and n-MOSFET. Meanwhile, an electro-thermal analytical model is proposed to explain the thermal distribution during this transient. Last, the avalanche withstand time of the fabricated SiC p-MOSFET is experimentally demonstrated to be 27% higher than that of the n-channel one. It is concluded that the SiC p-MOSFET could be a competitive power switch applicable for high-frequency complementary inverters.
Janus Microspheres for Visual Assessment of Molecular Interconnects (2013)

A rigid S-functionalized metalloligand is used to pair Janus Au-coated silica microspheres and the resulting assemblies are assessed with optical microscopy. New Pd complexes provide stable molecular interconnects, and the metal centre controls the structure of the linker and provides the desired rigidity, by virtue of its well-established coordination chemistry.
Influence of the Processing on the Surface Structure of Potato Granules as Viewed by SEM (1977)

Abstract Formation of the final surface structure of potato granules during the drying cycle of the freezethaw process is observed by scanning electron microscope. The cause of the formation of aggregates, polished cells, cemented granules and shrunken potato cells is discussed. The attention is given to the influence of surface structure on the rate of water penetration into the granules.
Role of transglutaminases in dermatitis herpetiformis (2023)

In this review article, after a short introduction, the authors present the pathogenesis and pathomechanism of dermatitis herpetiformis from the perspective of the transglutaminase enzyme family. According to our current knowledge, these isoenzymes consist of nine members in humans, and four of them play a role in the development of the disease. The main autoantigen is probably epidermal transglutaminase, but the role of other isozymes cannot be neglected either. The mechanism of the development of gluten-sensitive enteropathy is presented, followed by the theory of formation of IgA-epidermal transglutaminase immune complexes. The article also briefly covers the associated disorders of the blood coagulation system and neurological conditions.
An entity maintenance and connection service for sensor networks (2003)

In this paper, we present a middleware architecture for coordination services in sensor networks that facilitates interaction between groups of sensors which monitor different environmental events. It sits on top of the native routing infrastructure and exports the abstraction of mobile communication endpoints maintained at the locations of such events. A single logical destination is created and maintained for every environmental event of interest. Such destinations are uniquely labeled and can be used for communication by application-level algorithms for coordination and sensory data management between the different event locales. For example, they may facilitate coordination, in a distributed intrusion scenario, among nodes in the vicinity of the intruders.We evaluate our middleware architecture using GloMoSim, a wireless network simulator. Our results illustrate the success of our architecture in maintaining event-related communication endpoints. We provide an analysis of how architectural and network dependent parameters affect our performance. Additionally we provide a proof of concept implementation on a real sensor network testbed (Berkeley's MICA Motes).
A Photoelastic Analysis of Machining Stresses (1960)

Direct measurements of the distributions of normal and frictional stresses on a rake face under cutting conditions have been considered to be practically impossible. However, as reported in this paper, the stress distributions have been successfully obtained photoelastically by using a tool made of a photoelastic material. According to the authors’ experiment, the frictional stress on the rake face is distributed uniformly over a wide range of the tool-chip contact length, but it decreases rapidly near the point of chip-separation on the rake face. As to the normal stress, it has a peak near the cutting edge, being rather stationary in the middle part of the contact length and decreasing gradually toward the point of chip-separation.
Progress report on the NAL energy doubler design study (1974)

For close to a year and a half, a study has been in [progress at NAL to examine the feasibility of con-structing the "Energy Doabler" -an accelerator emjploying superconducting magnets which would increase ithe energy of protons available at the Laboratory substantially above that provided by the present accelera-'tor system and possibly to 1000 C5eV.In this paper, we report on the progress to date and on plans for continuing the study in the immediate future.' i ;
Polysaccharide purified fromGanoderma luciduminduced activation and maturation of human monocyte-derived dendritic cells by the NF-κB and p38 mitogen-activated protein kinase pathways (2005)

Ganoderma lucidum, a fungus native to China, has been widely used to promote health and longevity in the Chinese. The polysaccharide component with a branched (1-->6)-beta-D-glucan moiety of G. lucidum (PS-G) has been reported to exert anti-tumor activity and activation of natural killer cells. In this study, we investigated the effects of PS-G on human monocyte-derived dendritic cells (DC). Treatment of DC with PS-G resulted in the enhanced cell-surface expression of CD80, CD86, CD83, CD40, CD54, and human leukocyte antigen (HLA)-DR, as well as the enhanced production of interleukin (IL)-12p70, p40, and IL-10 and also IL-12p35, p40, and IL-10 mRNA expression, and the capacity for endocytosis was suppressed in DC. In addition, treatment of DC with PS-G resulted in enhanced T cell-stimulatory capacity and increased T cell secretion of interferon-gamma and IL-10. Neutralization with antibodies against Toll-like receptor (TLR)-4 inhibited the PS-G-induced production of IL-12 p40 and IL-10, suggesting a vital role for TLR-4 in signaling DC upon incubation with PS-G. Further study showed that PS-G was able to augment inhibitor of kappaB (IkappaB) kinase and nuclear factor (NF)-kappaB activity and also IkappaB alpha and p38 mitogen-activated protein kinase (MAPK) phosphorylation. Further, inhibition of NF-kappaB by helenalin and p38 MAPK by SB98059 prevented the effects of PS-G in the expression of CD80, CD86, CD83, CD40, CD54, and HLA-DR and production of IL-12p70, p40, and IL-10 in various degrees. Taken together, our data demonstrate that PS-G can effectively promote the activation and maturation of immature DC, suggesting that PS-G may possess a potential in regulating immune responses.
Effects of Chinese Medicinal Formula BNG-1 on Phosphodiesterase 3B Expression, Hepatic Steatosis, and Insulin Resistance in High Fat Diet-induced NAFLD Mice (2018)

<b>Background:</b> Chinese medicinal formula BNG-1, a non-specific inhibitor of phospho-diesterases (PDEs), can be considered as a potential anti-inflammatory agent. The present study was aimed at determining the effects of BNG-1 on the development of non-alcoholic fatty liver disease (NAFLD) in mice. <b>Design and Methods:</b> Male CD1 mice were randomly divided into seven groups, the control Con (4) and Con (8)+saline groups were fed a standard control diet for four or eight weeks; the experimental HFD (4) and HFD (8)+saline groups were fed a high fat diet for four or eight weeks; the HFD (8)+LBNG, HFD (8)+MBNG, and HFD (8)+HBNG groups received a high fat diet along with low, moderate or high doses of BNG-1 (0.026, 0.035, and 0.052g/30g body weight) which was administered for the last four weeks of an eight-week experimental period. After the end of experiment, blood and tissue samples were taken and analyzed. <b>Results:</b> Mice in the HFD (4) group had higher levels of alanine aminotransferase (ALT), plasma and hepatic triglyceride and cholesterol, and homeostasis model assessment-estimated insulin resistance (HOMA-IR) compared with mice in the Con (4) group. Mice receiving the high fat diet along with the BNG-1 supplement had decreased body weight gains and lower visceral fat weights compared with the HFD (8)+saline group. They had also significantly reduced levels of abnormal ALT and HOMA-IR, and improved blood lipid profile. BNG-1-treated mice exhibited reduced hepatic lipid accumulation, lower oxidative stress, and decreased expression of pro-inflammatory cytokines (TNF-α and IL-1β). Furthermore, BNG-1 treatment resulted in down-regulation of hepatic cyclic-AMP dependent PDE3B and up-regulation of PDE3B expression in epididymis adipose tissue. <b>Conclusions:</b> BNG-1 mediated changes in PDE3B expression along with reduction in oxidative stress and inflammation. BNG-1 may ameliorate insulin resistance and hepatic steatosis in the NAFLD mouse model.
5-(Alkylsulfonyl)salicylanilides as potential dental antiplaque agents (1986)

A series of 22 5-(alkylsulfonyl)salicylanilides was synthesized and evaluated for in vitro antibacterial and antiplaque activity against Actinomyces viscosus and Streptococcus mutans, adherent microorganisms implicated in periodontal disease and dental caries. The minimum inhibitory concentrations of 25 salicylanilides (including 5-acyl-, 5-alkyl-, and 5-(alkylsulfonyl)-4'-bromo- and -4'-(trifluoromethyl)salicylanilides) were found to correlate (r = 0.94) with estimated log D values. Several salicylanilides, such as 5-(decylsulfonyl)- and 5-(dodecylsulfonyl)-4'-(trifluoromethyl)salicylanilides (15 and 19) were found to exhibit high levels of in vitro antibacterial and antiplaque activity against A. viscosus and S. mutans.
CHROMOSOMAL ABNORMALITIES AND THE MORPHOLOGY OF MOUSE SPERM HEADS (1975)

In the mouse, numerous mutagens, teratogens and carcinogens have been shown to induce marked elevations in the fraction of sperm with head shape abnormalities. Since carcinogens and teratogens may act by causing genetic damage, a likely explanation of these results is that the sperm abnormalities are also caused by genetic damage. There are two more or less distinct classes of genetic damage, chromosomal aberrations and point mutations. In this paper, we provide evidence, that in general, chromosomal aberrations are not responsible for causing abnormally shaped sperm. Chromosomal aberrations could have caused abnormal sperm morphology in a number of ways. One possibility was that the mere presence of a translocated chromosome within the germ cell led to the malformation of the sperm head. A second possibility was that chromosomal imbalance, i.e., aneuploidy, duplications or deficiencies, within the spermatid or haploid cells caused abnormalities in shape. We tested these hypotheses by measuring the level of abnormally shaped sperm in mice homozygous and heterozygous for 24 various reciprocal and Robertsonian translocations. The diploid cells of these mice are known to be chromosomally balanced, containing translocated chromosomes. A predictable proportion of their gametes are, however, chromosomally unbalanced and carry translocated chromosomes. It was found that the levels of sperm abnormalities in these mice were convincingly unrelated to the levels predicted by any of the above hypotheses. Based on these results it seems that sperm abnormalities in mice are not due to the mere presence of translocated chromosomes in germ cells and also not due to chromosomal aneuploidy or duplication-deficiencies of chromosomal segments in the spermatid during development of the sperm.
A New Localization Objective for Accurate Fine-Grained Affordance Segmentation Under High-Scale Variations (2019)

Fine-grained affordance segmentation for object parts can greatly benefit robotics and scene understanding applications. In this work, we propose an instance-segmentation framework that can accurately localize functionality and affordance of individual object parts. We build on the standard Mask-RCNN framework and propose two novelties to the localization objective that can lead to improved part detection and affordance segmentation results. Specifically, we notice two problems with the conventional IOU based regression loss, (a) the small boxes, that are specially relevant for fine-grained detection, have a higher risk of being ignored during the optimization process and (b) a constant value of IOU for non-overlapping candidates means no supervision is available to encourage the reduction in loss function. To address these limitations, we propose a novel Angular Intersection Over Larger (AIOL) measure. Our experiments show consistent improvement over other baselines and state of the art localization loss functions for the fine-grained affordance segmentation task.
Improved endurance behavior of resistive switching in (Ba,Sr)TiO3 thin films with W top electrode (2008)

We compared the resistive switching performance of barium strontium titanate (BST) thin films with tungsten (W) and platinum (Pt) top electrodes, respectively. The yield, endurance, and reliability were strongly improved for the samples with W top electrode. Whereas the samples with Pt top electrode show a fast drop in the resistance for both high and low resistance states, the devices with W top electrode can be switched for 104 times without any obvious degradation. We attribute the improved switching performance to a reversible oxidation and reduction in a WOx layer at the W-BST interface, which was detected by time-of-flight secondary-ion-mass spectroscopy measurements.
Signal‐level fusion for indexing and retrieval of facial biometric data (2022)

Abstract The growing scope, scale, and number of biometric deployments around the world emphasise the need for research into technologies facilitating efficient and reliable biometric identification queries. This work presents a method of indexing biometric databases, which relies on signal‐level fusion of facial images (morphing) to create a multi‐stage data structure and retrieval protocol. By successively pre‐filtering the list of potential candidate identities, the proposed method makes it possible to reduce the necessary number of biometric template comparisons to complete a biometric identification transaction. The proposed method is extensively evaluated on publicly available databases using open‐source and commercial off‐the‐shelf recognition systems. The results show that using the proposed method, the computational workload can be reduced down to around 30% while the biometric performance of a baseline exhaustive search‐based retrieval is fully maintained, both in closed‐set and open‐set identification scenarios.
MOS characterization of thermally oxided 6H silicon carbide (1993)

An MOS evaluation of the SIO/sub 2//SiC interface as a function of oxidation conditions and substrate doping is reported. 6H SiC (Si face) epitaxial wafers were thermally oxidized in both wet and dry ambients. MOS capacitors were formed by thermally evaporating circular aluminium field plates. Capacitance transient (C-t) measurements have been performed at elevated temperatures (260-370 degrees C). Approximate values for intrinsic carrier concentration n/sub i/ as a function of temperature in the range 270-360 degrees C have been obtained directly from the measured C-V curve. These n/sub i/ values are more than two orders of magnitude larger than would be calculated by extrapolating the accepted room temperature value. Based on these n/sub i/ values, bulk generation lifetime tau /sub G/ and surface generation velocity S/sub 0/ are calculated for an n-type sample using a modified Zerbst technique. Both tau /sub G/ and S/sub 0/ are within about a factor of 20 of the best reported silicon values.
The effects of the seat cushion contour and the sitting posture on surface pressure distribution and comfort during seated work (2020)

The conclusion was that the cushion contour had a greater effect on seat pan interface pressure parameters than the sitting posture. Notably, AP and MPP can be indicators for assessing seat cushion comfort in a short-term perspective. Int J Occup Med Environ Health. 2020;33(5):675-89.
Mechanistic Inferences from the Binding of Ligands to LpxC, a Metal-Dependent Deacetylase, (2006)

The metal-dependent deacetylase LpxC catalyzes the first committed step of lipid A biosynthesis in Gram-negative bacteria. Accordingly, LpxC is an attractive target for the development of inhibitors that may serve as potential new antibiotics for the treatment of Gram-negative bacterial infections. Here, we report the 2.7 A resolution X-ray crystal structure of LpxC complexed with the substrate analogue inhibitor TU-514 and the 2.0 A resolution structure of LpxC complexed with imidazole. The X-ray crystal structure of LpxC complexed with TU-514 allows for a detailed examination of the coordination geometry of the catalytic zinc ion and other enzyme-inhibitor interactions in the active site. The hydroxamate group of TU-514 forms a bidentate chelate complex with the zinc ion and makes hydrogen bond interactions with conserved active site residues E78, H265, and T191. The inhibitor C-4 hydroxyl group makes direct hydrogen bond interactions with E197 and H58. Finally, the C-3 myristate moiety of the inhibitor binds in the hydrophobic tunnel of the active site. These intermolecular interactions provide a foundation for understanding structural aspects of enzyme-substrate and enzyme-inhibitor affinity. Comparison of the TU-514 complex with cacodylate and imidazole complexes suggests a possible substrate diphosphate binding site and highlights residues that may stabilize the tetrahedral intermediate and its flanking transition states in catalysis. Evidence of a catalytic zinc ion in the native zinc enzyme coordinated by H79, H238, D242, and two water molecules with square pyramidal geometry is also presented. These results suggest that the native state of this metallohydrolase may contain a pentacoordinate zinc ion, which contrasts with the native states of archetypical zinc hydrolases such as thermolysin and carboxypeptidase A.
Different assembly species of IgM are directed to distinct degradation sites along the secretory pathway. (1993)

In 38C B lymphocytes the membrane form of IgM is displayed on the cell surface whereas the secretory form of IgM is degraded. In the EH cell line, a light chain-deficient variant of 38C cells, the mu heavy chains are partially assembled with surrogate light chains characteristic of pre-B cells. In these cells neither the membrane (microns) nor the secretory (microsecond) forms of the mu heavy chain reach their final destination, and both are rapidly degraded. The degradation of mu chains in EH cells, like that of microsecond in 38C cells, is nonlysosomal and occurs prior to the trans-Golgi. However, while microsecond degradation in 38C cells is inhibited by brefeldin A, in EH cells microsecond and micron are retained and degraded by a brefeldin A-insensitive mechanism. These results indicate that degradation in EH cells occurs within the endoplasmic reticulum, whereas degradation in 38C cells requires exit from this compartment. Thus, mu heavy chains can be degraded in multiple sites along the secretory pathway. The location of the degradation process is determined by the developmentally regulated assembly species of the mu chains with either "classical" or surrogate light chains.
Dynamic Virtual Power Plant Design for Fast Frequency Reserves:\n Coordinating Hydro and Wind (2021)

To ensure frequency stability in future low-inertia power grids, fast\nancillary services such as fast frequency reserves (FFR) have been proposed. In\nthis work, the coordination of conventional (slow) frequency containment\nreserves (FCR) with FFR is treated as a decentralized model matching problem.\nThe design results in a dynamic virtual power plant (DVPP) whose aggregated\noutput fulfills the system operator (SO) requirements in all time scales, while\naccounting for the capacity and bandwidth limitation of participating devices.\nThis is illustrated in a 5-machine representation of the Nordic synchronous\ngrid. In the Nordic grid, stability issues and bandwidth limitations associated\nwith non-minimum phase zeros of hydropower is a well-known problem. By\nsimulating the disconnection of a 1400 MW importing dc link, it is shown that\nthe proposed DVPP design allows for coordinating fast FFR from wind, with slow\nFCR from hydro, while respecting dynamic limitations of all participating\ndevices. The SO requirements are fulfilled in a realistic low-inertia scenario\nwithout the need to install battery storage or to waste wind energy by\ncurtailing the wind turbines.\n
Heat of Formation of Propylene Oxide. (1962)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeat of Formation of Propylene Oxide.G. C. Sinke and D. L. HildenbrandCite this: J. Chem. Eng. Data 1962, 7, 1, 74Publication Date (Print):January 1, 1962Publication History Published online1 May 2002Published inissue 1 January 1962https://pubs.acs.org/doi/10.1021/je60012a022https://doi.org/10.1021/je60012a022research-articleACS PublicationsRequest reuse permissionsArticle Views446Altmetric-Citations20LEARN 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