gebhart/patrepeval huggingface dataset:
Determination of rumen microbial growth in vitro from<sup>32</sup>P-labelled phosphate incorporation (1977)

1. The extracellular phosphate pool in incubations of rumen fluid or washed cell suspensions of mixed rumen bacteria (WCS) was labelled with 32P. From the constant extracellular phosphate pool specific activity and the amount of radioactivity incorporated during incubation, the amount of P incorporated in the microbial fraction was calculated. From the value for nitrogen: P determined in microbial matter, the amount of N incorporated was calculated as a measure of microbial growth. 2. Incorporation of soluble non-protein-N in incubations devoid of substrate protein was 50 and 80% of the values obtained using the isotope method for rumen fluid and WCS respectively. It is suggested that results obtained using the former method reflect 'net growth' of micro-organisms which is the result of simultaneous growth and degradation. The isotope method measures 'total growth', as isotope incorporation is not affected by degradation of non-growing cells. 3. Incorporation of 32P in P-containing microbial components (mainly nucleic acids) was compared with net synthesis of these components in incubations of WCS. The results showed different specific rates of synthesis and degradation for all components studied. It is concluded that the composition of microbial matter changed during growth. 4. When N incorporation, calculated from results obtained using the isotope method in incubations with rumen fluid, was compared with the amount of carbohydrate substrate fermented and the type of fermentation, values between 18-3 and 44-6 g N incorporated/kg of organic matter fermented were obtained. Low values were associated with large proportions of the substrate being fermented to lactate and the use of glucose instead of disaccharides as substrate. Part of the variation could also be attributed to differences in incubation period, reflected in different proportions of polysaccharide formed. 5. The use of isotopes for determination of rumen microbial growth in vitro is critically discussed.
[Functional disorders of the digestive tract in children with vertebrogenic diseases]. (1996)

The paper provides the results of comprehensive clinical and X-ray studies of the digestive tract by using ultrasonography, fiber gastroscopy, heat imaging. The X-ray symptomatology of its dysfunctions was examined in 89 children with vertebrogenic diseases (osteochondrosis, scoliosis, developmental anomalies, sequelae of birth injury to the neck, spine, vertebral arteries).
Video segmentation based on the presence and/or absence of moving objects (1999)

Video clip is the dominant component of multimedia system. However, video data are voluminous. An effective and efficient visual data management system is highly desired. Recent technology in digital video processing has moved to 'content-based' storage and retrieval. To detect meaningful area/region, using only production and camera operation- based detection is not enough. The contents of a video also have to be considered. The basic idea of this scheme is that if we can distinguish individual objects in the whole video sequence, we would be able to capture the changes in content throughout the sequences. Among many object features, motion content has been widely used as an important key in video storage and retrieval systems. Therefore, through motion- based representation, this paper will investigate an algorithm for sub-shot extraction and key-frame selection. From a given video sequence, first we segment the sequence into shots by using some of the production and camera operation-based detection techniques. Then, from the beginning of each shot, we calculate optical flow vectors by using complex wavelet phase-matching-based method on a pair of successive frames. Next, we segment each moving object based on these vectors using clustering in a competitive agglomeration scheme and represent them into a number of layers. After separating moving object(s) from each other for every frame in this shot, we extract sub-shots and select key-frames by using information about the presence and absence of moving object in each layer. Finally, these key-frames and sub-shots have been used to represent the whole video in panoramic mosaic-based representation form. Experimental results showing the significance of the proposed method are also provided.© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
An Improved Approach to Locating Pinhole Defects in MOS and Bipolar Integrated Circuits Using Liquid Crystals (1976)

Routine failure analysis of dielectric defects using nematic liquid crystals is possible with the method described in this paper. The refinements on previously described implementations result in excellent definition of the pinhole site. The paper discusses the principle involved in liquid crystal pinhole detection and details a practical liquid crystal fixture and device preparation. The influence of cell voltage polarity is illustrated and shown to be an important factor in achieving satisfactory results. The effectiveness of using dark field illumination and polarized light is shown and compared with the conventional bright field illumination used by prior authors. CMOS, MOS capacitor, and bipolar device analyses are included. Results are presented in sufficient detail to allow the reader to easily implement the technique in his own laboratory.
Aliphatic alcohols stabilize an alternative conformation of the tryptophan synthase alpha 2 beta 2 complex from Salmonella typhimurium. (1994)

The conformational changes that accompany association of the tryptophan synthase alpha and beta 2 subunits are probed by investigating the effects of solvents on the catalytic and spectroscopic properties of tryptophan synthase. Low concentrations of ethanol, propanol, and butanol inhibit conversion of L-serine and indole to L-tryptophan by the alpha 2 beta 2 complex. Inhibition depends on the concentration, chain length, and hydrophobicity of the alcohol. In contrast, these alcohols increase the rates of conversion of beta-chloro-L-alanine and indole to L-tryptophan and of L-serine to pyruvate. Thus, alcohols alter the substrate specificity and reaction specificity of the alpha 2 beta 2 complex. These altered specificities are similar to those of the free beta 2 subunit in aqueous solution. The spectroscopic properties of enzyme-substrate intermediates formed by the alpha 2 beta 2 complex in 3 M ethanol and 0.5 M 1-butanol also resemble the intermediates formed by the free beta 2 subunit in aqueous solution. Experiments using gel-filtration, membrane ultrafiltration, and limited proteolysis show that the alpha 2 beta 2 complex does not dissociate at low concentrations of alcohols. Our results provide evidence that alcohols can stabilize an alternative conformation of the alpha 2 beta 2 complex which is similar to the open conformation of the free beta 2 subunit in aqueous solution.
A simplified nonlinear regression method for human height estimation in video surveillance (2015)

This paper presents a simple camera calibration method for estimating human height in video surveillance. Given that most cameras for video surveillance are installed in high positions at a slightly tilted angle, it is possible to retain only three calibration parameters in the original camera model, namely the focal length, the tilting angle and the camera height. These parameters can be directly estimated using a nonlinear regression model from the observed head and foot points of a walking human instead of estimating the vanishing line and point in the image, which is extremely sensitive to noise in practice. With only three unknown parameters, the nonlinear regression model can fit data efficiently. The experimental results show that the proposed method can predict the human height with a mean absolute error of only about 1.39 cm from ground truth data.
Some Remarks Concerning the Real and Imaginary Parts of the Characteristic Roots of a Finite Matrix (1960)

Some theorems are obtained on the existence of certain determinantal equations whose roots are separately the real or imaginary parts of the characteristic roots of a given matrix with simple elementary divisors. When the elementary divisors are not simple, similar, but somewhat less precise, results are obtained.
Adaptive call admission control under quality of service constraints: a reinforcement learning solution (2000)

We solve the adaptive call admission control (CAC) problem in multimedia networks via reinforcement learning (RL). The problem requires that network revenue be maximized while simultaneously meeting quality of service (QoS) constraints that forbid entry into certain states and use of certain actions. We show that RL provides a solution to this constrained semi-Markov decision problem and is able to earn significantly higher revenues than alternative heuristics. Unlike other model-based algorithms, RL does not require the explicit state transition models to solve the decision problems. This feature is very important if one considers large integrated service networks supporting a number of different service types, where the number of states is so large that model-based optimization algorithms are infeasible. Both packet-level and call-level QoS constraints are addressed, and both conservative and aggressive approaches to the QoS constraints are considered. Results are demonstrated on a single link and extended to routing on a multilink network.
A Recommendation System for Execution Plans Using Machine Learning (2016)

Generating execution plans is a costly operation for the DataBase Management System (DBMS). An interesting alternative to this operation is to reuse the old execution plans, that were already generated by the optimizer for past queries, to execute new queries. In this paper, we present an approach for execution plan recommendation in two phases. We firstly propose a textual representation of our SQL queries and use it to build a Features Extractor module. Then, we present a straightforward solution to identify query similarity.This solution relies only on the comparison of the SQL statements. Next, we show how to build an improved solution enabled by machine learning techniques. The improved version takes into account the features of the queries’ execution plans. By comparing three machine learning algorithms, we find that the improved solution using Classification Based on Associative Rules (CAR) identifies similarity in 91 % of the cases.
Random Networks for Communication (2008)

Random networks for communication , Random networks for communication , کتابخانه دیجیتال جندی شاپور اهواز
Development of 4 in. field-emission displays (1997)

This article describes experimental results on the fabrication of monochrome 4 in. field-emission displays (FEDs) on soda–lime glass substrates for practical use in manufacturing display. By fabrication of the Spindt-type field emitters without utilizing conventional resistive layers, several parameters closely related to these emitter arrays are discussed. In addition, analytical studies on the process environments of microtip fabrication and their related processes for FED mass production are significantly focused in this article. The characteristics of the field-emission quality is improved using unique gas and electrical aging effects on the microtip.
Neutron Age in Mixtures of D<sub>2</sub>O and H<sub>2</sub>O (1958)

The neutron age for fission neutrons and Po-Be neutrons was measured in mixtures of D2O and H2O. The age was evaluated from the second moment of the slowing-down distribution at the 1.4-ev resonance of indium. The ages of fission neutrons at concentrations of 99.8, 99.0, 98.4, 95.3, 94.0, 91.8, 48.6% D2O, and in pure H2O were 109, 107, 106, 93, 86, 78, 38.6, and 31 cm2, respectively. In the range from 100 to 90% D2O, the rate of decrease of the age was approximately 4 cm2 for each additional per cent of H2O. The ages of Po-Be neutrons in 99.4, 48.6% D2O, and in H2O were 148, 72.5, and 55.7 cm2, respectively.
Recombinant Staphylokinase Variants With Altered Immunoreactivity (1997)

SakSTAR(K74), a variant of recombinant staphylokinase with a single substitution of Lys74 with Ala, and SakSTAR(K74), with Lys74, Glu75, and Arg77 substituted with Ala, have intact thrombolytic potencies but induce significantly less antibody formation in patients.
In tight junctions, claudins regulate the interactions between occludin, tricellulin and marvelD3, which, inversely, modulate claudin oligomerization (2012)

Tight junctions seal the paracellular cleft of epithelia and endothelia, form vital barriers between tissue compartments and consist of tight-junction-associated marvel proteins (TAMPs) and claudins. The function of TAMPs and the interaction with claudins are not understood. We therefore investigated the binding between the TAMPs occludin, tricellulin, and marvelD3 and their interaction with claudins in living tight-junction-free human embryonic kidney-293 cells. In contrast to claudins and occludin, tricellulin and marvelD3 showed no enrichment at cell-cell contacts indicating lack of homophilic trans-interaction between two opposing cell membranes. However, occludin, marvelD3 and tricellulin exhibited homophilic cis-interactions, along one plasma membrane, as measured by fluorescence resonance energy transfer. MarvelD3 also cis-interacted with occludin and tricellulin heterophilically. Classic claudins, such as claudin-1 to -5 may show cis-oligomerization with TAMPs, whereas the non-classic claudin-11 did not. Claudin-1 and -5 improved enrichment of occludin and tricellulin at cell-cell contacts. The low mobile claudin-1 reduced the membrane mobility of the highly mobile occludin and tricellulin, as studied by fluorescence recovery after photobleaching. Co-transfection of claudin-1 with TAMPs led to changes of the tight junction strand network of this claudin to a more physiological morphology, depicted by freeze-fracture electron microscopy. The results demonstrate multilateral interactions between the tight junction proteins, in which claudins determine the function of TAMPs and vice versa, and provide deeper insights into the tight junction assembly.
CONTRIBUTION TO THE CLASSIFICATION OF WELDING FLUXES FOR SUBMERGED-ARC WELDING ACCORDING TO THEIR METALLURGICAL BEHAVIOUR (1991)

The metallurgical behaviour of fluxes for submerged-arc welding is investigated, and in particular how well the behaviour is reproduced by Boniszewski's equation for the degree of basicity.Proposals are also put forward for replacing the classification of welding fluxes according to the degree of basicity by other evaluation scales. Theoretical considerations on the form of bonding are discussed in this connection. Finally, a report is given of experiments aimed at determining the oxygen content in the weld deposit.
Polarization effects of axicons (1979)

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text David Fink, "Polarization effects of axicons," Appl. Opt. 18, 581-582 (1979) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Isolation and characterization of Shigella shigae cytotoxin. (1980)

Shigella shigae cytotoxin was isolated from pressure-dialyzed culture medium and from a 26-year-old sample of partially purified toxin. The toxin was adsorbed to a column of acid-treated chitin at low salt concentration and eluted with 1 M NaCl. The partially purified toxin was labeled with 125 I and resubmitted to chromatography on acid-treated chitin. The labeled material eluted with 1 M NaCl was mixed with unlabeled rabbit hemoglobin as a carrier and the toxin was further purified by chromatography on a DE52 column and by sucrose gradient centrifugation. In polyacrylamide gel electrophoresis in the presence of sodium dodecyl sulfate, the pure Shigella toxin migrated as two bands corresponding to molecular weights of 30,500 and of about 11,000. The intact toxin may consist of one heavy chain and four to five copies of the light chain. In isoelectric focusing experiments, Shigella toxin was recovered from a broad zone between pH 5.8 and pH 7.5. This appears to be due to charge heterogeneities both in the large and the small chain. Most cell lines tested were completely resistant even to high concentrations of Shigella toxin. Vero cells and one strain of HeLa cells were very sensitive, 2.5 pg/ml of pure toxin induced 50% inhibition of protein synthesis overnight in HeLa cells.
Tristetraprolin regulates expression of VEGF and tumorigenesis in human colon cancer (2009)

Tristetraprolin (TTP) is an AU-rich element-binding protein that regulates mRNA stability. Here, we report that TTP suppress the growth of human colon cancer cells both in vivo and in vitro by regulating of the expression of vascular endothelial growth factor (VEGF). TTP protein expression in human colonic tissues was markedly decreased in colonic adenocarcinoma compared with in normal mucosa and adenoma. VEGF expression was higher in colonic adenocarcinoma than in normal mucosa and adenoma. Specific inhibition of TTP expression by RNA-interference increased the expression of VEGF in cultured human colon cancer cells, and TTP overexpression markedly decreased it. In addition, elevated expression of TTP decreased the expression level of luciferase linked to a 3' terminal AU-rich element (ARE) of VEGF mRNA. Colo320/TTP cells overexpressing TTP grew slowly in vitro and became tumors small in size when xenografted s.c into nude mice. These findings demonstrate that TTP acts as a negative regulator of VEGF gene expression in colon cancer cells, suggesting that it can be used as novel therapeutic agent to treat colon cancer.
Reactions of Diethyl N-Alkoxyphosphoramidate Anions with Carbon Dioxide and Carbon Disulfide (1965)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of Diethyl N-Alkoxyphosphoramidate Anions with Carbon Dioxide and Carbon DisulfideRandolph T. Major and Robert J. HedrickCite this: J. Org. Chem. 1965, 30, 4, 1268–1270Publication Date (Print):April 1, 1965Publication History Published online1 May 2002Published inissue 1 April 1965https://pubs.acs.org/doi/10.1021/jo01015a521https://doi.org/10.1021/jo01015a521research-articleACS PublicationsRequest reuse permissionsArticle Views88Altmetric-Citations17LEARN 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
Comparison of finger and intra-arterial blood pressure monitoring at rest and during laboratory testing. (1989)

The accuracy of blood pressure values obtained by continuous noninvasive finger blood pressure recording via the FINAPRES device was evaluated by comparison with simultaneous intraarterial monitoring both at rest and during performance of tests known to induce fast and often marked changes in blood pressure. The comparison was performed in 24 normotensive or essential hypertensive subjects. The average discrepancy between finger and intra-arterial blood pressure recorded over a 30-minute rest period was 6.5 +/- 2.6 mm Hg and 5.4 +/- 2.9 mm Hg for systolic and diastolic blood pressure, respectively; a close between-method correspondence was also demonstrated by linear regression analysis. The beat-to-beat changes in finger systolic and diastolic blood pressure were on average similar to those measured intra-arterially during tests that induced a pressor or depressor response (hand-grip, cold pressor test, diving test, Valsalva maneuver, intravenous injections of phenylephrine and trinitroglycerine) as well as during tests that caused vasomotor changes without major variations in blood pressure (application of lower body negative pressure, passive leg raising). The average between-method discrepancy in the evaluation of blood pressure changes was never greater than 4.3 and 2.0 mm Hg for systolic and diastolic blood pressure, respectively; the corresponding standard deviations ranged between 4.6 and 1.6 mm Hg. Beat-to-beat computer analysis of blood pressure variability over the 30-minute rest period provided standard deviations almost identical when calculated by separate consideration of intra-arterial and finger blood pressure tracings (3.7 and 3.8 mm Hg, respectively).(ABSTRACT TRUNCATED AT 250 WORDS)
Low-Temperature Growth of Well-Aligned ZnO Nanorods by Chemical Vapor Deposition (2002)

1D single-crystalline zinc oxide nanostructures are promising for nanoscale optoelectronic applications. Here a simple chemical vapor deposition method for the growth of well-aligned ZnO nanorods (see Figure) at low temperature is demonstrated. The nanorods, which grow on fused silica and are preferentially oriented in the c-axis direction, are strongly UV light emitting, peaking at around 386 nm at room temperature.
Infliximab "TNF-alpha antagonist" decreases intraabdominal adhesions. (2007)

Early blocking of the activity of TNF-alpha after cecal abrasion resulted in lower rates of adhesion formation, macroscopically. The TNF-alpha, a proinflammatory cytokine appears to be an important mediator for postoperative adhesion formation.
Concepts for Dynamic Scheduling in the Laboratory (2004)

Laboratory environments are controlled more and more by automated systems. Written procedures and lab journals are replaced by workflow description languages and electronic notebooks, which not only describe the processes but are used also for the control of the entire workbench, data acquisition, and documentation. Dynamic scheduling is needed in such an environment. Multiple samples with different procedures are processed in parallel, competing for the instruments. The whole environment may be also underlaid by optimization strategies like throughput or minimum sample processing time. The modeling of all components interacting on the workbench—samples, devices, sensors, results, database systems, and so on—needs to rely on concepts building a consistent framework. This article gives a set of terms and definitions used in a dynamic scheduling environment. It describes most of these entities in detail, including their functionality and attributes as well as their logical and physical interactions. It also describes concepts such as workflows with activities and constraints, functional libraries, hidden transport, and dynamic execution. Maintenance, calibration, and error management also are included. Finally, it discusses how the entities interact with the different components in the scheduling system.
[Effects of 3-n-butylphthalide on thrombosis formation and platelet function in rats]. (2001)

The results suggest that NBP is a potent antiplatelet drug, the mechanism of its antithrombotic and antiplatelet activity is related to its regulation of cAMP level and 5-HT release.