193 research outputs found
Lepton flavor violation via four-Fermi contact interactions at the International Linear Collider
Lepton flavor violating (LFV) process induced by the
four-Fermi contact interactions at the International Linear Collider (ILC) is
studied. Taking account of the event selection conditions, it is shown that the
ILC is sensitive to smaller LFV couplings as compared to the measurement of
process at the B-factory experiment. The upper bounds on some of
the LFV couplings are improved by several factors using polarized
beams at and by an order of magnitude at
.Comment: 14 pages, 6 figures. Version to appear in Phys.Lett.
Insight into single cell cloning in serum-free media
Chinese hamster ovary (CHO) cells have been used as host cells for the manufacturing of therapeutic recombinant proteins over the past decade. It is thought that the development of high performance cell lines, which satisfy both productivity and regulatory expectations, is one of the key success drivers to establish good manufacturing processes. The cell line for the clinical and commercial productions should be derived from a single progenitor or clone, and so the single cell cloning is an essential step during the cell line development. Recently serum-free media have been widely applied for this step. But under such conditions, the cloning efficiency varies significantly among the clones. This might be because the serum-free conditions can be stressful for the CHO cells exposed to such an unexpected cloning process.
In this study, we performed re-cloning from two pre-cloned cell lines to evaluate the impact of serum-free cloning on the resulting cell line characteristics; various parameters such as cell growth, productivity, fed-batch culture performance, product quality and cell stability were evaluated. As a result, most of the clones showed exactly the same performance before and after the cloning process, but some clones did not. The detail of these results will be presented and also the proper evaluation to be needed during cell line development, especially after the single cell isolation, will be discusse
Physiological variation among Tricholoma matsutake isolates generated from basidiospores obtained from one basidioma
ArticleMycoscience. 60(2): 102-109. (2019)journal articl
Sibling spore isolates of Tricholoma matsutake vary significantly in their ectomycorrhizal colonization abilities on pine hosts in vitro and form multiple intimate associations in single ectomycorrhizal roots
ArticleFungal Ecology. 43: 100874. (2020)journal articl
Colors of a Second Earth II: Effects of Clouds on Photometric Characterization of Earth-like Exoplanets
As a test-bed for future investigations of directly imaged terrestrial
exoplanets, we present the recovery of the surface components of the Earth from
multi-band diurnal light curves obtained with the EPOXI spacecraft. We find
that the presence and longitudinal distribution of ocean, soil and vegetation
are reasonably well reproduced by fitting the observed color variations with a
simplified model composed of a priori known albedo spectra of ocean, soil,
vegetation, snow and clouds. The effect of atmosphere, including clouds, on
light scattered from surface components is modeled using a radiative transfer
code. The required noise levels for future observations of exoplanets are also
determined. Our model-dependent approach allows us to infer the presence of
major elements of the planet (in the case of the Earth, clouds and ocean) with
observations having S/N in most cases and with high confidence if
S/N . In addition, S/N enables us to detect the
presence of components other than ocean and clouds in a fairly
model-independent way. Degradation of our inversion procedure produced by cloud
cover is also quantified. While cloud cover significantly dilutes the magnitude
of color variations compared to the cloudless case, the pattern of color
changes remains. Therefore, the possibility of investigating surface features
through light curve fitting remains even for exoplanets with cloud cover
similar to the Earth's.Comment: 33 pages, 16 figures, accepted for publication in ApJ (discussion,
references, and description of data reduction added, typo fixed
Integrated analysis of the oral and intestinal microbiome and metabolome of elderly people with more than 26 original teeth: a pilot study
Elderly subjects with more than 20 natural teeth have a higher healthy life expectancy than those with few or no teeth. The oral microbiome and its metabolome are associated with oral health, and they are also associated with systemic health via the oral-gut axis. Here, we analyzed the oral and gut microbiome and metabolome profiles of elderly subjects with more than 26 natural teeth. Salivary samples collected as mouth-rinsed water and fecal samples were obtained from 22 healthy individuals, 10 elderly individuals with more than 26 natural teeth and 24 subjects with periodontal disease. The oral microbiome and metabolome profiles of elderly individuals resembled those of subjects with periodontal disease, with the metabolome showing a more substantial differential abundance of components. Despite the distinct oral metabolome profiles, there was no differential abundance of components in the gut microbiome and metabolomes, except for enrichment of short-chain fatty acids in elderly subjects. Finally, to investigate the relationship between the oral and gut microbiome and metabolome, we analyzed bacterial coexistence in the oral cavity and gut and analyzed the correlation of metabolite levels between the oral cavity and gut. However, there were few associations between oral and gut for bacteria and metabolites in either elderly or healthy subjects. Overall, these results indicate distinct oral microbiome and metabolome profiles, as well as the lack of an oral-gut axis in elderly subjects with a high number of natural teeth
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