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Showing 1 to 12 of 144 entries
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Anthropometric determinants of rowing ergometer performance in physically inactive collegiate females.

Biology of sport

Podstawski R, Choszcz Dj, Konopka S, Klimczak J, Starczewski M.
PMID: 25609890
Biol Sport. 2014 Dec;31(4):315-21. doi: 10.5604/20831862.1133936. Epub 2014 Oct 16.

The aim of the study was to evaluate anthropometric characteristics as determinants of 500 m rowing ergometer performance in physically inactive collegiate females. In this cross-sectional study, which included 196 collegiate females aged 19-23 years not participating in regular...

Dimeric TADDOL Phosphoramidites in Asymmetric Catalysis: Domino Deracemization and Cyclopropanation of Sulfonium Ylides.

Angewandte Chemie (International ed. in English)

Klimczyk S, Misale A, Huang X, Maulide N.
PMID: 26138505
Angew Chem Int Ed Engl. 2015 Aug 24;54(35):10365-9. doi: 10.1002/anie.201503851. Epub 2015 Jul 03.

A gold-catalyzed asymmetric cyclopropanation of unactivated olefins with sulfonium ylides in the presence of a bimetallic catalyst with a novel dimeric TADDOL-phosphoramidite ligand is reported. This transformation allows a rare gold-catalyzed dynamic deracemization of chiral racemic substrates, where the...

Pressure tuning of laser diodes in the near-infrared up to 1850 nm: operational characteristics and reliability studies.

The Review of scientific instruments

Bercha A, Dybala F, Piechal B, Ivonyak Y, Klimczak M, Trzeciakowski WA.
PMID: 24985799
Rev Sci Instrum. 2014 Jun;85(6):063107. doi: 10.1063/1.4881607.

Wavelength tuning of infrared laser diodes in the high-hydrostatic pressure setup is demonstrated and its reliability is discussed in detail. Major reliability issues concern the photochemical reactions on the laser facet and the presence of strong absorption bands above...

Stereoselective gold(I) domino catalysis of allylic isomerization and olefin cyclopropanation: mechanistic studies.

The Journal of organic chemistry

Klimczyk S, Huang X, Kählig H, Veiros LF, Maulide N.
PMID: 26017800
J Org Chem. 2015 Jun 05;80(11):5719-29. doi: 10.1021/acs.joc.5b00666. Epub 2015 May 27.

Gold(I) catalysis of olefin activation is still a rare feature in the repertoire of that metal. Mechanistic studies on the gold(I)-catalyzed cyclopropanation of allyl-substituted sulfonium ylides, including kinetic analysis as well as detailed computational studies, reveal that the reaction...

Optical fibers with gradient index nanostructured core.

Optics express

Buczyński R, Klimczak M, Stefaniuk T, Kasztelanic R, Siwicki B, Stępniewski G, Cimek J, Pysz D, Stępień R.
PMID: 26480075
Opt Express. 2015 Oct 05;23(20):25588-96. doi: 10.1364/OE.23.025588.

We present a new approach for the development of structured optical fibers. It is shown that fibers having an effective gradient index profile with designed refractive index distribution can be developed with internal nanostructuring of the core composed of...

Ambulatory Holter monitoring in asymptomatic patients with DDD pacemakers - do we need ACC/AHA Guidelines revision?.

Archives of medical science : AMS

Chudzik M, Klimczak A, Wranicz JK.
PMID: 24273562
Arch Med Sci. 2013 Oct 31;9(5):815-20. doi: 10.5114/aoms.2013.38675. Epub 2013 Nov 05.

INTRODUCTION: We sought to determine the usefulness of ambulatory 24-hour Holter monitoring in detecting asymptomatic pacemaker (PM) malfunction episodes in patients with dual-chamber pacemakers whose pacing and sensing parameters were proper, as seen in routine post-implantation follow-ups.MATERIAL AND METHODS:...

Superconductivity phase diagram of Na(x)CoO2*1.3H2O.

Nature

Schaak RE, Klimczuk T, Foo ML, Cava RJ.
PMID: 12891350
Nature. 2003 Jul 31;424(6948):527-9. doi: 10.1038/nature01877.

The microscopic origin of superconductivity in the high-transition-temperature (high-T(c)) copper oxides remains the subject of active inquiry; several of their electronic characteristics are well established as universal to all the known materials, forming the experimental foundation that all theories...

Physical properties of the noncentrosymmetric superconductor Mg10Ir19B16.

Physical review letters

Klimczuk T, Ronning F, Sidorov V, Cava RJ, Thompson JD.
PMID: 18233551
Phys Rev Lett. 2007 Dec 21;99(25):257004. doi: 10.1103/PhysRevLett.99.257004. Epub 2007 Dec 19.

Specific heat, electrical resistivity, and magnetic susceptibility measurements on a high quality sample of Mg10Ir19B16 provide a self-consistent determination of its superconducting properties. They indicate that Mg10Ir19B16 is a type-II superconductor [T{C}=4.45 K, kappa(0) approximately 20], with an electron-phonon...

Nanoscale structures and dynamics of a boundary liquid layer.

Journal of physics. Condensed matter : an Institute of Physics journal

Walz M, Gerth S, Falus P, Klimczak M, Metzger TH, Magerl A.
PMID: 21795767
J Phys Condens Matter. 2011 Aug 17;23(32):324102. doi: 10.1088/0953-8984/23/32/324102. Epub 2011 Jul 27.

Our long term scientific interest is the understanding of the interface properties of flowing liquids on a microscopic level. Various mechanisms have been introduced to explain the origin of slip at a solid-liquid interface like the formation of a...

Prognostic value of the pretreatment neutrophil-to-lymphocyte ratio in patients with advanced gastrointestinal stromal tumors treated with sunitinib after imatinib failure.

Oncology letters

Sobczuk P, Teterycz P, Lugowska I, Klimczak A, Bylina E, Czarnecka AM, Kosela-Paterczyk H, Osuch C, Streb J, Rutkowski P.
PMID: 31452817
Oncol Lett. 2019 Sep;18(3):3373-3380. doi: 10.3892/ol.2019.10622. Epub 2019 Jul 16.

The neutrophil-to lymphocyte ratio (NLR) has been proven to be correlated with outcomes in various cancer types, including gastrointestinal stromal tumors (GIST). There is limited data regarding the clinical value of NLR during second line therapy after failure of...

TaRh.

Science advances

Carnicom EM, Xie W, Klimczuk T, Lin J, Górnicka K, Sobczak Z, Ong NP, Cava RJ.
PMID: 29736418
Sci Adv. 2018 May 04;4(5):eaar7969. doi: 10.1126/sciadv.aar7969. eCollection 2018 May.

It is a fundamental truth in solid compounds that the physical properties follow the symmetry of the crystal structure. Nowhere is the effect of symmetry more pronounced than in the electronic and magnetic properties of materials-even the projection of...

Two Octaves Supercontinuum Generation in Lead-Bismuth Glass Based Photonic Crystal Fiber.

Materials (Basel, Switzerland)

Buczynski R, Bookey H, Klimczak M, Pysz D, Stepien R, Martynkien T, McCarthy JE, Waddie AJ, Kar AK, Taghizadeh MR.
PMID: 28788699
Materials (Basel). 2014 Jun 19;7(6):4658-4668. doi: 10.3390/ma7064658.

In this paper we report a two octave spanning supercontinuum generation in a bandwidth of 700-3000 nm in a single-mode photonic crystal fiber made of lead-bismuth-gallate glass. To our knowledge this is the broadest supercontinuum reported in heavy metal...

Showing 1 to 12 of 144 entries