نتایج جستجو برای: ttv

تعداد نتایج: 389  

2012
Ji-Wei Xie

We extract Transit Timing Variation (TTV) signals for pairs of transiting planet candidates that are near first-order Mean Motion Resonances (MMR), using publicly available Kepler lightcurves (Q0-Q9). We are able to solidly confirm the planetary nature of 12 new pairs because their TTV signals exhibit sinusoidal variations at the expected timescale and with reasonable phases. Applying the analy...

Journal: :Advanced Materials Interfaces 2022

Smart materials are highly desirable over the recent decade due to growing demand on complicated nature. with stable stimuli-responsive properties widely applied in sensors, smart windows, displays, and chemical valves, but they relatively rare. Most of current chromic triggered by one or two external stimuli, only a few multi-stimuli responsive instances still suffer their restricting function...

2012
Aline Massaú Cristiana Martins Gilca Costa Nachtigal Anelise Bergmann Araújo Maria Lucia Rossetti Christian Niel Cláudia Maria Dornelles da Silva

Torque teno virus is a human non-enveloped singlestranded circular DNA virus with icosahedral symmetry and a particle size of approximately 30 nm. TTV was first characterised as a blood-borne virus and was initially referred to as transfusion-transmitted virus (Nishizawa et al. 1997). Its negative-sense genome is 3.6-3.9 kb in size (Mushahwar et al. 1999). Recently, it was renamed Torque teno v...

Journal: :Journal of virology 2000
H Okamoto M Takahashi N Kato M Fukuda A Tawara S Fukuda T Tanaka Y Miyakawa M Mayumi

Peripheral blood mononuclear cells (PBMC) harbored TT virus (TTV) of genotypes (3 and 4) different from those (1 and 2) of free virions in plasma of the same individuals. PBMC may act as a reservoir, and TTV of particular genotypes might have tropism for hematopoietic cells.

Journal: :Current topics in microbiology and immunology 2009
H Okamoto

Since 1997, groups of novel nonenveloped DNA viruses with a circular, single-stranded (negative sense) DNA genome of 3.6-3.9 kb, 3.2 kb, or 2.8-2.9 kb in size have been discovered and designated Torque teno virus (TTV), Torque teno midi virus (TTMDV), and Torque teno mini virus (TTMV), respectively, in the floating genus Anellovirus. These three anelloviruses frequently and ubiquitously infect ...

Journal: :Journal of virology 2005
Morris S Jones Amit Kapoor Vladimir V Lukashov Peter Simmonds Frederick Hecht Eric Delwart

A sequence-independent PCR amplification method was used to identify viral nucleic acids in the plasma samples of 25 individuals presenting with symptoms of acute viral infection following high-risk behavior for human immunodeficiency virus type 1 transmission. GB virus C/hepatitis G virus was identified in three individuals and hepatitis B virus in one individual. Three previously undescribed ...

2015
Angélica Yukari Takemoto Patrícia Okubo Patricia Keiko Saito Roger Haruki Yamakawa Maria Angélica Ehara Watanabe Waldir Veríssimo da Silva Sueli Donizete Borelli João Bedendo

Patients who undergo dialysis treatment or a renal transplant have a high risk of blood-borne viral infections, including the Torque teno virus (TTV). This study identified the presence of TTV and its genome groups in blood samples from 118 patients in dialysis and 50 renal-transplant recipients. The research was conducted in a hospital in the city of Maringá, state of Paraná. The viral DNA, ob...

Journal: :گوارش 0
akram pourshams kourosh azimi leyle kiani mehdi sarrafi mohammad farhadilangroody reza malekzadeh

introduction and aims: tt virus (ttv) is a dna virus and is proposed as a potential cause of non-a to e hepatitis. we aimed to investigate, for the first time, the prevalence of ttv in iranian healthy blood donors. materials and methods: three hundred and twelve healthy iranian blood donors were randomly selected and tested for ttv dna by the seminested polymerase chain reaction method. serum a...

2001
Suwanna NOPPORNPANTH Yong POOVORAWAN

TT virus (TTV) is not only an infectious agent of worldwide distribution but has also been demonstrated in various non-human primates in addition to humans. In the present study, we subjected the sera of 67 gibbons to PCR and nucleotide sequencing, with subsequent phylogenetic analysis to determine the nature of the relationship between TTV found in humans and non-human primates. We discovered ...

2013
Ji-Wei Xie Yanqin Wu Yoram Lithwick

A transiting planet exhibits sinusoidal transit-time-variations (TTVs) if perturbed by a companion near a mean-motion-resonance (MMR). We search for sinusoidal TTVs in more than 2600 Kepler candidates, using the publicly available Kepler light-curves (Q0-Q12). We find that the TTV fractions rise strikingly with the transit multiplicity. Systems where four or more planets transit enjoy four roug...

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