نتایج جستجو برای: fragmentation measurement

تعداد نتایج: 474775  

2017
Nicolas Kalogerakis Katerina Karkanorachaki G. Calypso Kalogerakis Elisavet I. Triantafyllidi Alexandros D. Gotsis Panagiotis Partsinevelos Fabio Fava

The fragmentation of high-density polyethylene (HDPE) films from single-use supermarket plastic bags to microplastics under laboratory-simulated onshore and nearshore conditions was investigated for a period of 6 months. The weathering process of the plastic strips either on beach sand or in seawater under direct natural sunlight was monitored by tensile strength, molecular weight measurements,...

Journal: :international journal of reproductive biomedicine 0
zohreh khodayari naeini hassan hassani bafrani hossein nikzad

background: an effect of cryopreservation on human sperm is sublethal cryodamage, in which cell viability post-thaw is lost more rapidly at later times than in fresh cells. objective:  this study examined whether the addition of an antioxidant to cryopreservation medium could improve the post-thaw parameters and evaluation of sperm chromatin quality of cryopreserved human spermatozoa from men w...

2000
A. V. Efremov

The perspectives of two new nonstandard methods of transversal quark polarization measurement are considered: the jet handedness and the so-called ”Collins effect” due to spin dependent T-odd fragmentation function responsible for the left-right asymmetry in fragmenting of transversally polarized quarks. Recent experimental indications in favor of these effects are observed: 1.The correlation o...

2011

Next-generation sequence based transcriptome methodologies (broadly referred to as RNA-seq) were initially developed in 2007 for massively parallel short read sequencing platforms. RNA-seq involves purification of RNA, followed by either selection of poly-A(+) RNA or depletion of ribosomal RNA. RNA is then converted into cDNA by one of two methods; 1) random priming, followed by cDNA fragmentat...

2009
J. Frantz

Various 2-particle direct photon-hadron correlation yields in p + p and Au + Au collisions at √ sNN = 200 GeV are presented. The per-trigger yield of direct photon hadron pairs from direct-photon-jet correlations is obtained by a statistical subtraction of the decay photon pairs from inclusive photon-hadron sample. The decay photon pertrigger yields are estimated from the measured π-hadron by m...

2011

Next-generation sequence based transcriptome methodologies (broadly referred to as RNA-seq) were initially developed in 2007 for massively parallel short read sequencing platforms. RNA-seq involves purification of RNA, followed by either selection of poly-A(+) RNA or depletion of ribosomal RNA. RNA is then converted into cDNA by one of two methods; 1) random priming, followed by cDNA fragmentat...

2009
Xia Yin Xin Wu Zhiliang Wang

Address Fragmentation plays a key role in the exponential growth of DFZ routing table, known as the scalability problem of current Internet. In this paper, we measure the severity of address fragmentation, and try to figure out the relationship between Prefix-Distance and Network-Distance of current Internet by taking Geographic-Distance as an approximation of NetworkDistance. We focus our meas...

1999
Danning Dong

We present preliminary results of a new measurement of the b quark fragmentation function in Z decays using a novel kinematic B hadron energy reconstruction technique. The measurement is performed using 150,000 hadronic Z events recorded in the SLD experiment at SLAC between 1996 and 1997. The small and stable SLC beam spot and the CCD-based vertex detector are used to reconstruct topological B...

Journal: :Journal of the American Society for Mass Spectrometry 2012
Benjamin T Walters Alec Ricciuti Leland Mayne S Walter Englander

The addition of mass spectrometry (MS) analysis to the hydrogen exchange (HX) proteolytic fragmentation experiment extends powerful HX methodology to the study of large biologically important proteins. A persistent problem is the degradation of HX information due to back exchange of deuterium label during the fragmentation-separation process needed to prepare samples for MS measurement. This pa...

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