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Showing 1 to 12 of 224 entries
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Quantitative characterization of critical nanoclusters nucleated on large single molecules.

Physical review letters

Winkler PM, Vrtala A, Steiner G, Wimmer D, Vehkamäki H, Lehtinen KE, Reischl GP, Kulmala M, Wagner PE.
PMID: 22463542
Phys Rev Lett. 2012 Feb 24;108(8):085701. doi: 10.1103/PhysRevLett.108.085701. Epub 2012 Feb 23.

First order phase transitions involve nucleation, formation of nanoscale regions of a new phase within a metastable parent phase. Using the heterogeneous nucleation theorem we show how clusters formed by nucleation on single molecules evolve from the gas phase...

Contrast-Enhanced Micro-Computed Tomography in Evaluation of Spontaneous Repair of Equine Cartilage.

Cartilage

Kulmala KA, Pulkkinen HJ, Rieppo L, Tiitu V, Kiviranta I, Brünott A, Brommer H, van Weeren R, Brama PA, Mikkola MT, Korhonen RK, Jurvelin JS, Töyräs J.
PMID: 26069636
Cartilage. 2012 Jul;3(3):235-44. doi: 10.1177/1947603511424173.

OBJECTIVE: Contrast-enhanced computed tomography (CECT) has been introduced for the evaluation of cartilage integrity. Furthermore, CECT enables imaging of the structure and density of subchondral bone. In this laboratory study, we investigate the potential of microCECT to simultaneously image...

"Dentinal microcracks after root canal preparation" a comparative evaluation with hand, rotary and reciprocating instrumentation.

Journal of clinical and diagnostic research : JCDR

Priya NT, Chandrasekhar V, Anita S, Tummala M, Raj TB, Badami V, Kumar P, Soujanya E.
PMID: 25654036
J Clin Diagn Res. 2014 Dec;8(12):ZC70-2. doi: 10.7860/JCDR/2014/11437.5349. Epub 2014 Dec 05.

INTRODUCTION: The purpose of this study was to compare the incidence of dentinal micro cracks after instrumentation with various types of NiTi files in rotary and reciprocating motion.MATERIALS AND METHODS: One hundred human extracted mandibular central incisors were taken...

Flavonolignans As a Novel Class of Sodium Pump Inhibitors.

Frontiers in physiology

Kubala M, Čechová P, Geletičová J, Biler M, Štenclová T, Trouillas P, Biedermann D.
PMID: 27065883
Front Physiol. 2016 Mar 30;7:115. doi: 10.3389/fphys.2016.00115. eCollection 2016.

We examined the inhibitory effects of three flavonolignans and their dehydro- derivatives, taxifolin and quercetin on the activity of the Na(+)/K(+)-ATPase (NKA). The flavonolignans silychristin, dehydrosilychristin and dehydrosilydianin inhibited NKA with IC50 of 110 ± 40 μM, 38 ±...

Combined use of biological indicators and dispersion models in air pollution monitoring.

Environmental monitoring and assessment

Jokinen J, Karjalainen R, Kulmala A.
PMID: 24264352
Environ Monit Assess. 1982 Dec;2(4):411-5. doi: 10.1007/BF00416699.

No abstract available.

Corrigendum: Polluted dust promotes new particle formation and growth.

Scientific reports

Nie W, Ding A, Wang T, Kerminen VM, George C, Xue L, Wang W, Zhang Q, Petäjä T, Qi X, Gao X, Wang X, Yang X, Fu C, Kulmala M.
PMID: 25735455
Sci Rep. 2015 Mar 04;5:8949. doi: 10.1038/srep08949.

No abstract available.

Nucleation burst in a coagulating system.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

Lushnikov AA, Kulmala M.
PMID: 11089039
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 2000 Oct;62(4):4932-9. doi: 10.1103/physreve.62.4932.

The source-enhanced formation and growth of disperse particles is considered assuming the particles born by nucleation grow then by coagulation and condensation of a low volatile vapor onto their surfaces. After formulating the basic equations governing the particle-formation-growth process...

Soluble-insoluble transition in binary heterogeneous nucleation.

Physical review letters

Petersen D, Ortner R, Vrtala A, Wagner PE, Kulmala M, Laaksonen A.
PMID: 11736410
Phys Rev Lett. 2001 Nov 26;87(22):225703. doi: 10.1103/PhysRevLett.87.225703. Epub 2001 Nov 12.

In this Letter, we report the first experimental study of binary heterogeneous gas-liquid nucleation. Onset activities were obtained for nucleation of various n-propanol-water vapor mixtures on 6.9 nm NaCl particles soluble in water and practically insoluble in n-propanol. The...

Toward direct measurement of atmospheric nucleation.

Science (New York, N.Y.)

Kulmala M, Riipinen I, Sipilä M, Manninen HE, Petäjä T, Junninen H, Maso MD, Mordas G, Mirme A, Vana M, Hirsikko A, Laakso L, Harrison RM, Hanson I, Leung C, Lehtinen KE, Kerminen VM.
PMID: 17761851
Science. 2007 Oct 05;318(5847):89-92. doi: 10.1126/science.1144124. Epub 2007 Aug 30.

Atmospheric aerosol formation is known to occur almost all over the world, and the importance of these particles to climate and air quality has been recognized. Although almost all of the processes driving aerosol formation take place below a...

Heterogeneous nucleation experiments bridging the scale from molecular ion clusters to nanoparticles.

Science (New York, N.Y.)

Winkler PM, Steiner G, Vrtala A, Vehkamäki H, Noppel M, Lehtinen KE, Reischl GP, Wagner PE, Kulmala M.
PMID: 18323450
Science. 2008 Mar 07;319(5868):1374-7. doi: 10.1126/science.1149034.

Generation, investigation, and manipulation of nanostructured materials are of fundamental and practical importance for several disciplines, including materials science and medicine. Recently, atmospheric new particle formation in the nanometer-size range has been found to be a global phenomenon. Still,...

The carrier gas pressure effect in a laminar flow diffusion chamber, homogeneous nucleation of n-butanol in helium.

The Journal of chemical physics

Hyvärinen AP, Brus D, Zdímal V, Smolík J, Kulmala M, Viisanen Y, Lihavainen H.
PMID: 16784271
J Chem Phys. 2006 Jun 14;124(22):224304. doi: 10.1063/1.2200341.

Homogeneous nucleation rate isotherms of n-butanol+helium were measured in a laminar flow diffusion chamber at total pressures ranging from 50 to 210 kPa to investigate the effect of carrier gas pressure on nucleation. Nucleation temperatures ranged from 265 to...

Flood or drought: how do aerosols affect precipitation?.

Science (New York, N.Y.)

Rosenfeld D, Lohmann U, Raga GB, O'Dowd CD, Kulmala M, Fuzzi S, Reissell A, Andreae MO.
PMID: 18772428
Science. 2008 Sep 05;321(5894):1309-13. doi: 10.1126/science.1160606.

Aerosols serve as cloud condensation nuclei (CCN) and thus have a substantial effect on cloud properties and the initiation of precipitation. Large concentrations of human-made aerosols have been reported to both decrease and increase rainfall as a result of...

Showing 1 to 12 of 224 entries