gebhart/patrepeval huggingface dataset:
Modulation of the Photophysical Properties of Gold Nanoparticles by Accurate Control of the Surface Coverage (2004)

ADVERTISEMENT RETURN TO ISSUEPREVNoteModulation of the Photophysical Properties of Gold Nanoparticles by Accurate Control of the Surface CoverageMarco Montalti, Luca Prodi, Nelsi Zaccheroni, and Gionata BattistiniView Author Information Dipartimento di Chimica "G.Ciamician", Università di Bologna, Via Selmi 2, 40126 Bologna, Italy Cite this: Langmuir 2004, 20, 18, 7884–7886Publication Date (Web):August 6, 2004Publication History Received8 April 2004Revised22 June 2004Published online6 August 2004Published inissue 1 August 2004https://pubs.acs.org/doi/10.1021/la0491044https://doi.org/10.1021/la0491044brief-reportACS PublicationsCopyright © 2004 American Chemical SocietyRequest reuse permissionsArticle Views375Altmetric-Citations25LEARN 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 SUBJECTS:Aromatic compounds,Fluorescence,Gold,Hydrocarbons,Metal nanoparticles Get e-Alerts
Sentinel Pigeon Surveillance for West Nile Virus by Using Lard-Can Traps at Differing Elevations and Canopy Cover Classes (2005)

Abstract Sentinel pigeons, Columba livia, were installed in lard-can traps at heights of 1.5 m and 7.6–9.1 m within differing canopy cover classes in New York City. Adult mosquitoes were collected weekly from July to October 2002, as were serum samples from each pigeon. Culex pipiens L. and Culex restuans Theobald comprised 97% of mosquitoes collected and were most numerous in canopy-level, forested traps. The West Nile virus (family Flaviviridae, genus Flavivirus, WNV) seroconversion rate was significantly greater for pigeons in canopy-level traps, although seroconversions occurred concurrently with human cases in the city and were of little prognostic value to public health agencies. Our results indicate that sentinel pigeons were most effective for monitoring enzootic transmission of WNV when placed in single-sentinel caging 7.6–9.1 m above ground level.
The absolute configuration of curdione and the stereostructure of curcumalactone from Curcuma wenyujin. (1985)

The absolute configuration of curdione isolated from Curcuma wenyujin was determined as 1 on the basis of its CD spectra and the X-ray diffraction of the p-bromobenzoate of 8αH-dihydrocurdione (2a). The absolute stereostructure of a new spirocyclopentanolide, curcumalactone occuring in the titled plant, was deduced as 3 based on its direct X-ray analysis and the biomimetic transformation of 1 to 3.
<i>Anaplasma phagocytophilum</i>from Rodents and Sheep, China (2010)

Abstract To characterize the strains of Anaplasma phagocytophilum in wild and domestic animals in China, we isolated the organism from rodents and sheep in northeastern China. We isolated 3 strains (2 from rodents and 1 from sick sheep) through propagation in BALB/c mice and then cell culture in HL60 cells. The 3 isolates were identified by Wright-Giemsa staining, immunofluorescence, and electronic microscopy and were characterized by sequence analyses of the 16S rRNA gene, partial citrate synthase gene, major surface protein 4 gene, and heat shock protein gene. The multiple sequences of the 3 isolates were identical to each other but different from all known strains from other countries. The public health and veterinary relevance of the isolates deserves further investigation.
Synthetic and biological studies on the spiro-mamakone system (2008)

An exploration of the chemistry of the spiro-mamakone system, exemplified by the cytotoxic, fungal metabolite spiro-mamakone A, is presented. The first reported synthesis of the spiro-mamakone carbon skeleton was achieved, as well as the synthesis of a variety of closely related analogues of the natural product. Biological testing of the synthetic analogues generated a structure-activity profile for the natural product, establishing the importance of the enedione moiety to biological activity.
<i>In Vitro</i> and <i>In Vivo</i> Efficacy of Florfenicol for Treatment of <i>Francisella asiatica</i> Infection in Tilapia (2010)

Francisella asiatica is a recently described, Gram-negative, facultative intracellular fish pathogen, known to be the causative agent of francisellosis in warm-water fish. Francisellosis outbreaks have increased in frequency among commercial aquaculture operations and have caused severe economic losses in every case reported. The lack of effective treatments for piscine francisellosis led us to investigate the potential efficacy of florfenicol for inhibition of F. asiatica in vitro and as an oral therapeutic agent in vivo. The MIC of florfenicol for F. asiatica, as determined by the broth dilution method, was 2 μg/ml, which indicates its potential efficacy as a therapeutic agent for treatment of francisellosis. The intracellular susceptibility of the bacterium to florfenicol in tilapia head kidney-derived macrophages (THKDM) was also investigated. Addition of florfenicol to the medium at 10 μg/ml was sufficient to significantly reduce bacterial loads in the THKDM in vitro. Cytotoxicity assays done in infected THKDM also demonstrated drug efficacy in vivo, as determined by lactate dehydrogenase (LDH) release. Levels of LDH released from infected THKDM were significantly lower in macrophages treated with florfenicol (P < 0.001) than in untreated cells. In medicated-feed trials, fish were fed 15 mg of florfenicol/kg of fish body weight for 10 days, and the feeding was initiated at either 1, 3, or 6 days postchallenge. Immersion challenges resulted in 30% mean percent survival in nontreated fish, and fish receiving medicated feed administered at 1 and 3 days postinfection showed higher mean percent survival (100% and 86.7%, respectively). A significant decrease (P < 0.001) in bacterial numbers (number of CFU/g of spleen tissue) was observed in treated groups compared to nontreated infected fish at both 1 and 3 days postchallenge. There were no differences in bacterial burden in the spleens between fish treated 6 days postchallenge and untreated controls. In conclusion, if florfenicol is administered during early stages of infection, it has the potential for effectively treating piscine francisellosis, including the capacity for intracellular penetration and bacterial clearance.
Using knowledge maintenance for preference assessment. (1995)

Most real-life decisions require the decision maker to make trade-offs in order to fulfill multiple conflicting objectives. This is especially true in medical decision making while selecting the optimal therapy plan from among competing therapy plans for a patient. Multi-attribute utility theory provides a framework to specify these trade-offs for optimal decision making based on the preferences of the decision maker. However traditional preference-assessment techniques are difficult to implement and rarely elicit the true preferences of the decision maker. We describe a new preference-assessment method based on the concept of knowledge maintenance where the preference model is changed each time it makes an incorrect recommendation. The method is implemented in a decision-theoretic system to evaluate competing three-dimensional radiation treatment plans. The preference-assessment method leads to preference models which perform better than preference models elicited using traditional assessment techniques.
Java to Logic programming (2010)

Definition: A popular object-oriented programming language, derived from C++ but with many significant differences, some of them improvements.
Stimulation of G<sub>s</sub>and Inhibition of G<sub>i</sub>Protein Functions by Minimally Oxidized LDL (1995)

We have previously shown that treatment of aortic endothelial cells with minimally oxidized LDL (MM-LDL) induces their interaction with monocytes but not neutrophils and that these induced responses are associated with increased cAMP levels. Here we studied the mechanism of by which MM-LDL elevates cAMP levels. Treatment of human aortic endothelial cells with MM-LDL resulted in a saturable dose-dependent increase in cAMP levels. Studies using a combination of pertussis toxin and MM-LDL suggested that part of the cAMP increase was due to the stimulation of Gs complexes. Studies with pertussis toxin-treated membranes in which Gi was completely inhibited were used to directly address the effect of MM-LDL on the Gs pathway. MM-LDL and an oxidized lipid (palmitoyl arachidonyl phosphatidylcholine), the effects of which mimic those of MM-LDL, caused a 40% to 100% increase in cAMP levels in these isolated membranes that was augmented by GTP, thus showing Gs stimulation. These results also show that MM-LDL increases cAMP levels by inhibiting Gi. MM-LDL inhibited ADP ribosylation of Gi by about 30% and completely abolished the ability of serotonin to interact with Gi complexes, whereas direct activation of Gi by mastoparan was not inhibited. This observation suggests that MM-LDL interferes with the interaction of Gi molecules with inhibitory receptors. There was no direct effect of MM-LDL on adenylate cyclase. Overall, these studies show that MM-LDL increases cAMP levels both by stimulating Gi and inhibiting Gi complexes.
Synthesis and Luminescent Properties of Transparent Oxyfluoride Glass-Ceramics Containing Er<sup>3+</sup>:YLiF<sub>4</sub>Nanocrystals (2010)

Transparent glass-ceramics containing YLiF4 nano-crystals were synthesized by controlled heat treatment of LiF–YF3–Al2O3–SiO2 glass. The crystallite size, estimated to be about 8 nm, was much less than the wavelength of visible light. From the fluorescent properties of the Er3+-doped precursor glass and the glass-ceramic, it was confirmed that Er3+ could be incorporated into YLiF4 nano-crystallites in the glass-ceramic. This transparent glass-ceramic containing YLiF4 nano-crystals is promising as a gain medium for rare earth-doped fiber lasers and amplifiers.
Scalable Network-Layer Defense Against Internet Bandwidth-Flooding Attacks (2009)

In a bandwidth-flooding attack, compromised sources send high-volume traffic to the target with the purpose of causing congestion in its tail circuit and disrupting its legitimate communications. In this paper, we present active Internet traffic filtering (AITF), a network-layer defense mechanism against such attacks. AITF enables a receiver to contact misbehaving sources and ask them to stop sending it traffic; each source that has been asked to stop is policed by its own Internet service provider (ISP), which ensures its compliance. An ISP that hosts misbehaving sources either supports AITF (and accepts to police its misbehaving clients), or risks losing all access to the complaining receiver-this is a strong incentive to cooperate, especially when the receiver is a popular public-access site. We show that AITF preserves a significant fraction of a receiver's bandwidth in the face of bandwidth flooding, and does so at a per-client cost that is already affordable for today's ISPs; this per-client cost is not expected to increase, as long as botnet-size growth does not outpace Moore's law. We also show that even the first two networks that deploy AITF can maintain their connectivity to each other in the face of bandwidth flooding. We conclude that the network-layer of the Internet can provide an effective, scalable, and incrementally deployable solution against bandwidth-flooding attacks.
Reversible alignment change of liquid crystals induced by photochromic molecular films (1993)

Abstract The nematic director alignment in the liquid crystal cell was reversibly regulated by the geometrical isomerization of α-hydrazono- β-keto esters chemically linked on the substrate surface. Two methods for the surface modification were employed successfully. Method I was based on direct modification of substrates with α-hydrazono-β-keto ester units having a silylating group. Cells fabricated with these substrates showed altering reversible liquid crystal alignment through a combination of photoirradiation and heating. In method II, ω-acryloyloxyalkyl α-hydrazono-β-keto ester units were introduced through Michael addition to substrates modified with 3-aminopropyltriethoxysilane. The liquid crystal alignment in this case altered reversibly according to the reversible photoisomerization of the α-hydrazono-β-keto units on the substrates. The results strongly support the observation that a change in molecular shape, due to geometrical isomerization, is responsible for regulating the nematic director alignment.
Characterization of self-assembled supramolecular [Ga<sub>4</sub>L<sub>6</sub>] host-guest complexes by electrospray ionization mass spectrometry (2006)

Self-assembled supramolecular host-guest complexes have been characterized by electrospray ionization mass spectrometry. The spectra obtained by use of a Q-TOF instrument equipped with a Z-spray ion source show primarily the 3- and 4- charge states of the assemblies. The assemblies have the general formula [guest subset Ga4L6]11- where L represents the chelating bidentate catechol ligand 1,5-bis(2',3'-dihydroxy-benzamido)naphthalene and guests are tetramethyl ammonium (Me4N+), tetraethyl ammonium (Et4N+), tetra-n-propyl ammonium (Pr4N+) and decamethylcobaltocenium (Cp*2Co+) cations. For the first time, the mass spectrum of the empty assembly [Ga4L6]12- is reported. This article also reports that provided the electrospray ion source is capable of preserving noncovalent interactions, it is possible to observe host-guest complexes containing both weak binding guests as well as sterically demanding guests in the mass spectra. The present data suggest that electrospray mass spectrometry is a powerful tool for characterization of supramolecular host-guest complexes.
Prototyping of time-division unbalanced carrier sense multiple access and first experiments (2012)

This paper presents the work of prototyping a weakly synchronous and distributed coordination function called Time-Division Unbalanced Carrier Sense Multiple Access (TDuCSMA). The prototype, designed and developed by modification of the wireless Atheros drivers, is meant to demonstrate the feasibility of TDuCSMA and its capabilities in bandwidth management and QoS provisioning. Furthermore, the bandwidth reservation model, derived and verified by simulations in previous works, is validated by real communication experiments.
Distribution and epidermal growth factor receptor expression of primordial follicles in human ovarian tissue before and after cryopreservation (2000)

The freezing of ovarian tissue and the growth of immature oocytes from primordial follicles is an interesting concept in ovarian tissue transplantation and in-vitro fertilization. In this study, the morphology and distribution of primordial follicles were studied in ovarian tissue from 24 women before and after cryopreservation. Cryopreservation did not significantly change either the morphology or number per unit volume of morphologically normal follicles in frozen ovarian tissue. Primordial follicles were predominant, accounting for 78.6% and 82.6% of total follicles in fresh and frozen ovarian tissues respectively. The distribution of follicles was extremely uneven in ovarian tissue. A large variation in follicle numbers was observed in ovarian tissue samples from patient to patient, and even in the same patient, indicating that the number of follicles counted in one sample of ovarian tissue may not represent the number of follicles in other tissue samples. Ovarian tissue could be frozen in the form of strips instead of fragments for fast processing and better viability of ovarian tissue in cryopreservation. The number of follicles in ovarian tissue declined with the increasing age of the patients. An immunohistochemical study showed that immunoreactivity for the epidermal growth factor (EGF) receptor was detected in primordial follicles of adult ovarian tissue. EGF receptor staining was most intense in the oocytes of primordial follicles. Weak staining for EGF receptor was observed in some surrounding pregranulosa cells. Immunohistochemical staining for EGF receptor was also present in the stromal cells of ovarian tissue, but to a much lesser degree. There was no significant difference in the immunohistochemical staining for EGF receptor in ovarian tissue before and after cryopreservation.
Shootin1: a protein involved in the organization of an asymmetric signal for neuronal polarization (2006)

Neurons have the remarkable ability to polarize even in symmetrical in vitro environments. Although recent studies have shown that asymmetric intracellular signals can induce neuronal polarization, it remains unclear how these polarized signals are organized without asymmetric cues. We describe a novel protein, named shootin1, that became up-regulated during polarization of hippocampal neurons and began fluctuating accumulation among multiple neurites. Eventually, shootin1 accumulated asymmetrically in a single neurite, which led to axon induction for polarization. Disturbing the asymmetric organization of shootin1 by excess shootin1 disrupted polarization, whereas repressing shootin1 expression inhibited polarization. Overexpression and RNA interference data suggest that shootin1 is required for spatially localized phosphoinositide-3-kinase activity. Shootin1 was transported anterogradely to the growth cones and diffused back to the soma; inhibiting this transport prevented its asymmetric accumulation in neurons. We propose that shootin1 is involved in the generation of internal asymmetric signals required for neuronal polarization.
Further characterization of the structural and functional properties of the cross‐linked complex between F‐actin and myosin S‐1 (1985)

Several structural and functional properties of the covalent complex, formed upon cross-linking of the myosin heads (S-1) to F-actin with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide, were characterized. The elevated Mg2+-ATPase activity was measured during a 1-month storage of the complex under various conditions. In aqueous medium it showed a rapid time-dependent decrease but it was significantly more stable in the presence of 50% ethylene glycol at -20 degrees C. The ATPase loss most likely reflects a progressive conformational change within the S-1 ATPase site resulting from its greater exposure to the medium, induced by the permanently bound F-actin. The covalent acto-S1 complex was submitted to depolymerization-repolymerization experiments using different depolymerizing agents (0.6 M KI; 4.7 M NH4Cl; low-ionic-strength solution). The depolymerization led to an immediate loss of the enhanced Mg2+-ATPase activity; this activity was almost entirely recovered upon repolymerization of the complex. The protein material formed upon depolymerization of the covalent acto-S1 was analyzed by gel chromatography, gel electrophoresis, analytical ultracentrifugation and electron microscopy. It comprised mainly small-sized actin oligomers associated with the covalently bound S-1 and only a limited amount of free G-actin. The results illustrate the relationships between the filamentous state of actin and its ability to stimulate the Mg2+-ATPase activity of S-1. They also indicate that the binding of S-1 to F-actin is transmitted to several neighbouring actin subunits and strengthens the interactions between actin monomers. Acto-S1 cross-linked complexes were prepared in the presence of tropomyosin and the tropomyosin-troponin system. Under the conditions employed, the regulatory proteins were not cross-linked to actin or S-1 and did not affect the extent or the pattern of S-1 cross-linking to F-actin. Measurements of the elevated Mg2+-ATPase activity of the cross-linked preparations revealed that tropomyosin and the tropomyosin-troponin complex, in the absence of Ca2+, inhibit ATP hydrolysis; the extent of ATPase inhibition (up to 50%) was dependent on the amount of covalently bound S-1, being larger at low level of S-1 cross-linking; the addition of Ca2+ restored the ATPase activity to the control value. The data provide direct evidence that the regulatory proteins can modulate directly the kinetics of ATP hydrolysis by the covalent acto-S1 complex as has earlier been suggested for the reversible complex [Chalovich, J. M. and Eisenberg, E. (1982) J. Biol. Chem. 257, 2432-2437].(ABSTRACT TRUNCATED AT 400 WORDS)
Pontibacter niistensis sp. nov., isolated from forest soil (2011)

Microbiology Society journals contain high-quality research papers and topical review articles. We are a not-for-profit publisher and we support and invest in the microbiology community, to the benefit of everyone. This supports our principal goal to develop, expand and strengthen the networks available to our members so that they can generate new knowledge about microbes and ensure that it is shared with other communities.
Comparison of Three Different Minimally Invasive Procedures of Distal Gastrectomy for Nonoverweight Patients with T1N0-1 Gastric Cancer (2013)

Laparoscopic-assisted distal gastrectomy has recently come to be a standard procedure for the treatment of early gastric cancer (1 - 5) in select patients. The minimal invasiveness associated with laparoscopic procedures for the resection of gastrointestinal cancer has been repeatedly explained in part by the short incision that is required. (6 - 11) We used two different approaches to perform distal gastrectomies for the resection of gastric cancer as minimally invasive alternatives to a standard laparoscopic approach prior to our surgical team's complete mastery of the skills required for laparoscopic oncological surgery for gastric cancer. (9 , 12) If the minimal invasiveness associated with laparoscopic-assisted gastrectomy can be explained by the small incision, a gastrectomy via a small incision without the use of a pneumoperitoneum may provide a similar outcome in patients. However, to our knowledge, such a comparison has not been previously made. We compared the minimal invasiveness of three different approaches (minilaparotomy, minilaparotomy approach with laparoscopic assistance, and standard laparoscopic-assisted approach) to performing a distal gastrectomy for T1N0-1 gastric cancer in nonoverweight patients (body mass index, ≤ 25 kg/m(2)) performed within a limited study period.
Total Synthesis of Salinosporamide A (2008)

The total synthesis of salinosporamide A has been achieved through enzymatic desymmetrization, diastereoselective aldol reaction, intramolecular aldol reaction, and intermolecular Reformatsky-type reaction followed by 1,4-reduction as key reactions.
Resonant Magnetopolaron Effects due to Interface Phonons in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>GaAs</mml:mi><mml:mi>/</mml:mi><mml:mi>AlGaAs</mml:mi></mml:math>Multiple Quantum Well Structures (1997)

Polaron cyclotron resonance (CR) has been studied in three modulation-doped $\mathrm{GaAs}/\mathrm{Al}{}_{0.3}{\mathrm{Ga}}_{0.7}\mathrm{As}$ multiple quantum well structures in magnetic field up to 30 T. Large avoided-level-crossing splittings of the CR near the GaAs reststrahlen region, and smaller splittings in the region of the AlAs-like optical phonons of th AlGaAs barriers, are observed. Based on a comparison with a detailed theoretical calculation, the high frequency splitting, the magnitude of which increases with decreasing well width, is assigned to resonant polaron interactions with AlAs-like interface phonons.