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DISCOVERY OF AN ULTRACOMPACT GAMMA-RAY MILLISECOND PULSAR BINARY CANDIDATE
Kong, Albert K. H.,Jin, Ruolan,Yen, T.-C.,Hu, C.-P.,Hui, C. Y.,Tam, P. H. T.,Takata, J.,Lin, L. C. C.,Cheng, K. S.,Park, S. M.,Kim, C. L. IOP Publishing 2014 ASTROPHYSICAL JOURNAL LETTERS - Vol.794 No.2
<P>We report multi-wavelength observations of the unidentified Fermi object 2FGL J1653.6-0159. With the help of high-resolution X-ray observations, we have identified an X-ray and optical counterpart to 2FGL J1653.6-0159. The source exhibits a periodic modulation of 75 minutes in the optical and possibly also in the X-ray. We suggest that 2FGL J1653.6-0159 is a compact binary system with an orbital period of 75 minutes. Combining the gamma-ray and X-ray properties, 2FGL J1653.6-0159 is potentially a black-widow-/redback-type gamma-ray millisecond pulsar (MSP). The optical and X-ray light curve profiles show that the companion is mildly heated by the high-energy emission and that the X-rays are from intrabinary shock. Although no radio pulsation has yet been detected, we estimated that the spin period of the MSP is similar to 2 ms based on a theoretical model. If pulsation can be confirmed in the future, 2FGL J1653.6-0159 will become the first ultracompact rotation-powered MSP.</P>
Catiane S. Souza,Bruno M. Oliveira,Gustavo G. L. Costa,Albert Schriefer,Alessandra Selbach-Schnadelbach,Ana Paula T. Uetanabaro,Carlos P. Pirovani,Gonçalo A. G. Pereira,Alex G. Taranto,Júlio Cézar de 한국미생물학회 2009 The journal of microbiology Vol.47 No.4
Chitin synthase (CHS) is a glucosyltransferase that converts UDP-N-acetylglucosamine into chitin, one of the main components of fungal cell wall. Class III chitin synthases act directly in the formation of the cell wall. They catalyze the conversion of the immediate precursor of chitin and are responsible for the majority of chitin synthesis in fungi. As such, they are highly specific molecular targets for drugs that can inhibit the growth and development of fungal pathogens. In this work, we have identified and characterized a chitin synthase gene of Moniliophthora perniciosa (Mopchs) by primer walking. The complete gene sequence is 3,443 bp, interrupted by 13 small introns, and comprises a cDNA with an ORF with 2,739 bp, whose terminal region was experimentally determined, encoding a protein with 913 aa that harbors all the motifs and domains typically found in class III chitin synthases. This is the first report on the characterization of a chitin synthase gene, its mature transcription product, and its putative protein in basidioma and secondary mycelium stages of M. perniciosa, a basidiomycotan fungus that causes witches’ broom disease of cacao.
Johannes Hausmann,Andrea Tal,Artur Gomer,Michael Philipper,Gero Moog,Horst Hohn,Norbert Hesselbarth,Harald Plass,Jörg Albert,Fabian Finkelmeier 대한소화기내시경학회 2021 Clinical Endoscopy Vol.54 No.1
Background/Aims: Reliable and especially widely accepted preventive measures are crucial to further reduce the incidenceof colorectal cancer (CRC). Colon capsule endoscopy (CCE) might increase the screening numbers among patients unable orunwilling to undergo conventional colonoscopy. This registry trial aimed to document and determine the CCE indications, findings,complications, and adverse events in outpatient practices and clinics throughout Germany. Methods: Patients undergoing CCE between 2010 and 2015 were enrolled in this prospective multicenter registry trial at six Germancenters. Patient demographics, outcomes, and complications were evaluated. Results: A total of 161 patients were included. Of the CCE evaluations, 111 (68.9%) were considered successful. Pathological findingsin the colon (n=92, 60.1%) and in the remaining gastrointestinal tract (n=38, 24.8%) were recorded. The main finding was thepresence of polyps (n=52, 32.3%). Furthermore, five carcinomas (3.1%) were detected and histologically confirmed later. Adequatebowel cleanliness was more likely to be achieved in the outpatient setting (p<0.0001). Interestingly, 85 patients (55.6%) chose toundergo CCE based on personal motivation. Conclusions: CCE seems to be a reliable and safe endoscopic tool for screening for CRC and detecting other diseases. Its patientacceptance and feasibility seems to be high, especially in the outpatient setting.
Investigation of radioactivity-induced backgrounds in EXO-200
Albert, J. B.,Auty, D. J.,Barbeau, P. S.,Beck, D.,Belov, V.,Benitez-Medina, C.,Breidenbach, M.,Brunner, T.,Burenkov, A.,Cao, G. F.,Chambers, C.,Cleveland, B.,Coon, M.,Craycraft, A.,Daniels, T.,Danilov American Physical Society 2015 PHYSICAL REVIEW C - Vol.92 No.1
First search for Lorentz andCPTviolation in double beta decay with EXO-200
Albert, J. B.,Barbeau, P. S.,Beck, D.,Belov, V.,Breidenbach, M.,Brunner, T.,Burenkov, A.,Cao, G. F.,Chambers, C.,Cleveland, B.,Coon, M.,Craycraft, A.,Daniels, T.,Danilov, M.,Daugherty, S. J.,Davis, C. American Physical Society 2016 Physical Review D Vol.93 No.7
<P>A search for Lorentz- and CPT-violating signals in the double beta decay spectrum of Xe-136 has been performed using an exposure of 100 kg . yr with the EXO-200 detector. No significant evidence of the spectral modification due to isotropic Lorentz -violation was found, and a two-sided limit of -2.65 x 10(-5) GeV < (a)(of),(,3r) < 7.60 x 10(-6) GeV (90% C.L.) is placed on the relevant coefficient within the Standard -Model Extension (SME). This is the first experimental study of the effect of the SME-defined oscillation -free and momentum-independent neutrino coupling operator on the double beta decay process.</P>
Search for2νββdecay ofXe136to the01+excited state ofBa136with the EXO-200 liquid xenon detector
Albert, J. B.,Auty, D. J.,Barbeau, P. S.,Beck, D.,Belov, V.,Breidenbach, M.,Brunner, T.,Burenkov, A.,Cao, G. F.,Chambers, C.,Chaves, J.,Cleveland, B.,Coon, M.,Craycraft, A.,Daniels, T.,Danilov, M.,Dau American Physical Society 2016 Physical Review C Vol.93 No.3
<P>EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless pp decay of Xe-136 to the ground state of Ba-136. We report here on a search for the two -neutrino pp decay of Xe-136 to the first 0+ excited state, 0(1)(+), of Ba-136 based on a 100 kg yr exposure of Xe-136. Using a specialized analysis employing a machine learning algorithm, we obtain a 90% CL half-life sensitivity of 1.7 x 10(24) yr. We find no statistically significant evidence for the 20P decay to the excited state resulting in a lower limit of Ti-1/2(7 nu) (0(+) -> 0(1)(+)) > 6.9 x10(23) yr at 90% CL. This observed limit is consistent with the estimated half-life of 2.5 x 10(25) yr.</P>
Albert, A.,André,, M.,Anghinolfi, M.,Anton, G.,Ardid, M.,Aubert, J.-J.,Avgitas, T.,Baret, B.,Barrios-Martí,, J.,Basa, S.,Bertin, V.,Biagi, S.,Bormuth, R.,Bourret, S.,Bouwhuis, M. C.,Bruijn American Physical Society 2017 Physical review. D Vol.96 No.2
<P>The Advanced LIGO observatories detected gravitational waves from two binary black hole mergers during their first observation run (O1). We present a high-energy neutrino follow-up search for the second gravitational wave event, GW151226, as well as for gravitational wave candidate LVT151012. We find two and four neutrino candidates detected by IceCube, and one and zero detected by ANTARES, within +/- 500 s around the respective gravitational wave signals, consistent with the expected background rate. None of these neutrino candidates are found to be directionally coincident with GW151226 or LVT151012. We use nondetection to constrain isotropic-equivalent high-energy neutrino emission from GW151226, adopting the GW event's 3D localization, to less than 2 x 10(51)-2 x 10(54) erg.</P>