Proton-proton collisions at the LHC

Summaries of newsworthy papers: Proton-proton collisions at the LHC; Engineering liquid quadrupoles; Propagation of B cells in culture

This press release contains:

Summaries of newsworthy papers:

Proton-proton collisions at the LHC
Engineering liquid quadrupoles
Propagation of B cells in culture

Mention of papers to be published at the same time
Geographical listing of authors

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[1] Proton-proton collisions at the LHC
DOI: 10.1038/ncomms1472

The first experimental measurement of the proton-proton cross-section at 7 TeV is reported by the ATLAS collaboration at the Large Hadron Collider (LHC) this week in Nature Communications. This finding marks the highest energy collision for protons observed to date. These data are important for modelling cosmic ray showers and validating our understanding of high-energy particle interactions.
The cross-section describes the probability for two particles to collide and depends on the energy of the particles.

Understanding the rate of proton interactions is fundamentally important for particle physics but it cannot be worked out from existing theories. The team at ATLAS determined this rate by measuring the subatomic products resulting from the colliding protons using the ATLAS detector.
The results confirm previous predications for the behaviour of high-energy protons.

CONTACT

Klaus Mönig (CERN, ATLAS Secretariat, Geneva, Switzerland)
Tel: +41 227 674 279; E-mail: [email protected]

[2] Engineering liquid quadrupoles
DOI: 10.1038/ncomms1471

Researchers have created the fluid analogue of an electrostatic quadrupole. The discovery, reported this week in Nature Communications, may find use in cell biology as a means to culture stem cells.
Quadrupoles have many engineering applications, most notably as magnets used to focus beams of charged particles in particle accelerators. However, experimental applications of fluid quadrupoles have not been reported until now.

The microfluidic quadrupole demonstrated by David Junker and colleagues consists of flowing liquids rather than magnetic fields. A stagnation point at the centre of the quadrupole can be readily adjusted in both size and position from which a concentration gradient can form, allowing solutions to move between poles. This could provide a platform for cultivating cell cultures that are normally hard to breed inside closed channels, such as stem cells.

CONTACT

David Juncker (McGill University, Montreal, Canada)
Tel: +1 514 398 7676; E-mail: [email protected]

[3] Propagation of B cells in culture
DOI: 10.1038/ncomms1475

Naive B cells can be induced to proliferate in culture and can produce cells with a phenotype similar to germinal centre B cells. The findings, published in Nature Communications, suggest that this method can be used to propagate B cells in vitro facilitating the study of germinal centre B cell differentiation.

Daisuke Kitamura and colleagues culture B cells from mice on feeder cells in the presence of interleukin and show that this enhances the number of proliferating cells 180-fold after 6 days. The cells could also be transferred into mice and differentiate into memory B cell-like cells and can produce antibodies. Alternatively the cells can be cultured with another interleukin, IL-21, and to generate cells that are similar to long lived plasma cells.

This method allows the manipulation of the fate of B cells in culture and may permit the more in depth study of the differentiation of these cells.

CONTACT

Daisuke Kitamura (Tokyo University of Science, Chiba, Japan)
Tel: +81 4 7121 4071; E-mail: [email protected]

Papers to go live at the same time:

[4] Responsive nematic gels from the self-assembly of aqueous nanofibres
DOI: 10.1038/ncomms1465

[5] Smad6-specific recruitment of Smurf E3 ligases mediates TGF-β1-induced degradation of MyD88 in TLR4 signalling
DOI: 10.1038/ncomms1469

[6] Surfactant-enabled epitaxy through control of growth mode with chemical boundary conditions
DOI: 10.1038/ncomms1470

[7] Bacterial Pili exploit integrin machinery to promote immune activation and efficient blood-brain barrier penetration
DOI: 10.1038/ncomms1474

GEOGRAPHICAL LISTING OF AUTHORS…

The following list of places refers to the whereabouts of authors on the papers numbered in this release. For example, London: 4 - this means that on paper number four, there will be at least one author affiliated to an institute or company in London. The listing may be for an author's main affiliation, or for a place where they are working temporarily. Please see the PDF of the paper for full details.

ARGENTINA
Buenos Aires: 1
La Plata: 1

ARMENIA
Yerevan: 1

AUSTRALIA
Melbourne: 1
Sydney: 1

AUSTRIA
Innsbruck: 1
Wiener Neustadt: 1

AZERBAIJAN
Baku: 1

BELARUS
Minsk: 1

BRAZIL
Rio de Janeiro: 1
Sao Paulo: 1

CANADA
Burnaby: 1
Edmonton: 1
Montreal: 1, 2
Ottawa: 1
Saskatchewan: 1
Toronto: 1
Vancouver: 1
Victoria: 1

CHILE
Santiago: 1
Valparaiso: 1

CHINA
Anhui: 1
Beijing: 1
Guangzhou: 1
Jiangsu: 1
Shandong: 1

COLOMBIA
Bogota: 2

CZECH REPUBLIC
Olomouc: 1
Prague: 1

DENMARK
Copenhagen: 1

FRANCE
Annecy-le-Vieux: 1
Aubiere: 1
Gif-sur-Yvette: 1
Grenoble: 1
Marseilles: 1
Orsay: 1
Paris: 1
Villeurbanne: 1

GEORGIA
Tbilisi: 1

GERMANY
Berlin: 1
Bonn: 1
Dortmund: 1
Dresden: 1
Freiberg: 1
Giessen: 1
Gottingen: 1
Hamburg: 1
Heidelberg: 1
Mainz: 1
Mannheim: 1
Munich: 1
Siegen: 1
Wuppertal: 1
Wurzburg: 1

GREECE
Athens: 1
Thessaloniki: 1
Zografou: 1

HUNGARY
Budapest: 1

ISRAEL
Haifa: 1
Rehovot: 1
Tel Aviv: 1

ITALY
Bologna: 1
Frascati: 1
Genova: 1
Lecce: 1
Milan: 1
Naples: 1
Pavia: 1
Pisa: 1
Rende: 1
Rome: 1
Trieste: 1
Udine: 1

JAPAN
Chiba: 3
Hiroshima: 1
Ibaraki: 1
Kobe: 1
Kyoto: 1
Nagano: 1
Nagasaki: 1
Nagoya: 1
Okayama: 1
Osaka: 1
Shiga: 1
Tokyo: 1
Tsukuba: 1

MOROCCO
Casablanca: 1
Marrakesh: 1
Oujda: 1
Rabat: 1

NETHERLANDS
Amsterdam: 1
Nijmegen: 1

NORWAY
Bergen: 1
Oslo: 1

POLAND
Krakow: 1

PORTUGAL
Braga: 1
Coimbra 1
Lisbon: 1

ROMANIA
Bucharest: 1
Timisoara: 1

RUSSIA
Dubna: 1
Gatchina: 1
Moscow: 1
Novosibirsk: 1
Protvino: 1

SERBIA
Belgrade: 1

SLOVAK REPUBLIC
Bratislava: 1
Kosice: 1

SLOVENIA
Ljubljana: 1

SOUTH AFRICA
Johannesburg: 1

SOUTH KOREA
Seoul: 4, 5
Suwon: 5

SPAIN
Barcelona: 1
Granada: 1
Madrid: 1
Valencia: 1

SWEDEN
Lund: 1
Stockholm: 1
Uppsala: 1

SWITZERLAND
Bern: 1
Geneva: 1

TAIWAN
Taipei: 1

TURKEY
Ankara: 1
Gaziantep: 1
Istanbul: 1
Kutahya: 1

UNITED KINGDOM
Birmingham: 1
Brighton: 1
Cambridge: 1
Didcot: 1
Edinburgh: 1
Glasgow: 1
Lancaster: 1
Liverpool: 1
London: 1
Manchester: 1
Oxford: 1
Sheffield: 1
Surrey: 1

UNITED STATES OF AMERICA
Arizona
Tucson: 1
California
Berkeley: 1
Fresno: 1
Irvine: 1
La Jolla: 7
Los Angeles: 7
Pasadena: 1
San Diego: 7
Santa Cruz: 1
Stanford: 1
Connecticut
New Haven: 1
Illinois
Argonne: 1
Chicago: 1
DeKalb: 1
Urbana: 1
Indiana
Bloomington: 1
Iowa
Ames: 1
Iowa City: 1
Louisiana
Ruston: 1
Massachusetts
Boston: 1
Cambridge: 1
Medford: 1
Waltham: 1
Michigan
Ann Arbor: 1
East Lansing: 1
New Mexico
Albuquerque: 1
New York:
Albany: 1
Amherst: 1
Irvington: 1
New York: 1
Stony Brook: 1
Upton: 1
North Carolina
Durham: 1
Rayleigh: 6
Ohio
Columbus: 1
Oklahoma
Norman: 1
Stillwater: 1
Oregon
Eugene: 1
Pennsylvania
Philadelphia: 1
Pittsburgh: 1
South Carolina
Columbia: 1
Texas
Arlington: 1
Dallas: 1
Richardson: 1
Virginia
Hampton: 1
Washington
Seattle: 1
Wisconsin
Madison: 1

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Neda Afsarmanesh, Nature New York
Tel: +1 212 726 9231; E-mail: [email protected]

From Japan, Korea, China, Singapore and Taiwan
Mika Nakano, Nature Tokyo
Tel: +81 3 3267 8751; E-mail: [email protected]

From the UK
Rachel Twinn, Nature, London
Tel: +44 20 7843 4658; E-mail: [email protected]

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Published: 07 Sep 2011

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