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THE MASS PROFILE OF ABELL 1689 FROM A LENSING ANALYSIS OF DEEP WIDE FIELD SUBARU IMAGES
UMETSU KEIICHI,BROADHURST TOM,TAKADA MASAHIRO,KONG Xu The Korean Astronomical Society 2005 Journal of The Korean Astronomical Society Vol.38 No.2
We used Subaru observations of A1689 (z = 0.183) to derive an accurate, model-independent mass profile for the entire cluster, r$\le$2Mpc/h, by combining magnification bias and distortion measurements. The projected mass profile steepens quickly with increasing radius, falling away to zero at r${\~}$1.0Mpc/h, well short of the anticipated virial radius. Our profile accurately matches onto the inner profile, r $\le$200kpc/ h, derived from deep HST / ACS images. The combined ACS and Subaru information is well fitted by an NFW profile with virial mass, $(1.93 \pm 0.20) {\times}10^{15} M_{\bigodot}$, and surprisingly high concentration, $C_{vir} = 13.7^{+1.4}_{-1.1}$, significantly larger than theoretically expected ($C_{vir} {\le}4$), corresponding to a relatively steep overall profile. These results are based on a reliable sample of background galaxies selected to be redder than the cluster E/SO sequence. By including the faint blue galaxy population a much smaller distortion signal is found, demonstrating that blue cluster members significantly dilute the true signal for r $\le$ 400kpc/ h. This contamination is likely to affect most weak lensing results to date.
Risk Assessment of Pesticides: Risk of Eating
Noriharu Ken Umetsu 한국농약과학회 2007 한국농약과학회 학술발표대회 논문집 Vol.- No.-
In general, consumers tend to believe that synthetic pesticides and pesticide residues in crop plants are dangerous to our health. On the other hand, less attention has been paid to the naturally-occurring toxic substances in crop plants, which may cause or contribute to illness in humans. In this presentation, scientific findings will be provided in order to make a risk assessment of synthetic pesticides, or pesticide residues, as well as naturally-occurring substances existing in crop plants and in general chemicals surrounding us. The presentation is concerned with the effort made by the Pesticide Science Society of Japan and myself to change consumer's perception about issues concerning the safety of pesticide and pesticide residue. Discussion particularly focuses on the risk of eating crops and foods which may contain pesticide residues, food additives and many different kinds of natural chemicals. Scientists and government administration should fulfill their obligation to continuously conduct risk communication by revealing technical validation results of pesticide and pesticide residue safety and schemes to confirm safety in an easier way to understand, so that general consumers and the media can more fully comprehend them.
SOCIAL RELATIONSHIP AND SPATIAL DISTRIBUTION IN A SMALL HERD OF JAPANESE BLACK CATTLE IN A DRY-LOT
Nakanishi, Y.,Mutoh, Y.,Umetsu, R. Asian Australasian Association of Animal Productio 1992 Animal Bioscience Vol.5 No.1
Behaviour of 7 horned Japanese Black Cattle (3-9 years old) kept in a $450m^2$ dry-lot under loose housing condition was observed in the daytime (0930-1730 h) during 3 consecutive days. Eating and lying behaviour of cattle and the positions of all animals when lying together were recorded at 10-min intervals. Agonistic encounters and social licking interactions in the herd were also recorded. The cattle established a social hierarchy which was near linear. An irregularity in the diurnal rhythm of lying behaviour was found on the 3rd day, which appeared to be caused by oestrus behaviour of a herdmate. Eating frequency showed greater variation among individuals than lying frequency, and the most dominant animal ate most frequently in the herd. The spatial pattern of the herd when lying indicated a relatively loose dispersion in the lot. Higher ranking cattle tended to lie down more frequently near the hay rack in the lot, so that lower ranking animals had more difficult access to feed. Cattle with more social licking interactions had a tendency to lie down near each other irrespective of proximity of social order, therefore it was suggested that social preference among particular individuals occurred in the herd.
Tomohito Kameda,Yoshiaki Umetsu 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.53 No.-
Carbonate ion-intercalated Mg–Al layered double hydroxides (CO3-type Mg–Al LDHs) were prepared by using various methods to mix a solution of Mg(NO3)2 and Al(NO3)3 with an alkaline solution, and the particle properties of the obtained samples were compared. By mixing stoichiometric quantities of Mg2+, Al3+, and OH according to the coprecipitation reaction for preparing CO3-type Mg–Al LDHs, Mg2+ and Al3+ in solution were quantitatively precipitated, and the Mg/Al molar ratios of the obtained Mg–Al LDHs were equal to those of the solution, irrespective of the preparation method. However, the different preparation methods resulted in different particle properties, namely, different particle size distributions, particle morphologies, and sedimentation properties were observed. These differences were attributed to different formation processes for Mg–Al LDH. The ideal preparation method was determined to involve the addition of Mg(NO3)2 and Al(NO3)3 solution to Na2CO3 solution at a constant pH, which was achieved by adjusting with NaOH solution. This preparation method resulted in the formation of CO3-type Mg–Al LDH particles with uniform primary particles, good sedimentation properties, and a narrow distribution of secondary particle aggregates. Such characteristics make these Mg–Al LDHs excellent candidates for wastewater treatment.
Oral Immunotherapy for Food Allergy: Towards a New Horizon
Evelyne Khoriaty,Dale T. Umetsu 대한천식알레르기학회 2013 Allergy, Asthma & Immunology Research Vol.5 No.1
Food allergy has increased dramatically in prevalence over the past decade in westernized countries, and is now a major public health problem. Unfortunatelyfor patients with food allergy, there is no effective therapy beyond food allergen avoidance, and rapid medical treatment for accidentalexposures. Recently, oral immunotherapy (OIT) has been investigated as a treatment for this problem. In this review, we will discuss the progress indeveloping OIT for food allergy, including a novel approach utilizing Xolair (anti-IgE monoclonal antibody, omalizumab) in combination with OIT. Thiscombination may enhance both the safety and efficacy of oral immunotherapy, and could lead to a widely available and safe therapy for food allergy.
Isomorphic coalescence of aster cores formed <i>in vitro</i> from microtubules and kinesin motors
Kim, K,Sikora, A,Nakazawa, H,Umetsu, M,Hwang, W,Teizer, W IOP 2016 Physical Biology Vol.13 No.5
<P>We report fluorescence microscopy studies of the formation of aster-like structures emerging from a cellular element-based active system and a novel analysis of the aster condensation. The system consists of rhodamine labeled microtubules which are dynamically coupled by functionalized kinesin motor proteins cross-linked via streptavidin-coated quantum dots (QDs). The aster-shaped objects contain core structures. The cores are aggregates of the QD-motor protein complexes, and result from the dynamic condensation of sub-clusters that are connected to each other randomly. The structural specificity of the aster core reflects a configuration of the initial connectivity between sub-clusters. Detailed image analysis allows us to extract a novel correlation between the condensation speed and the sub-cluster separation. The size of the core is scaled down during the condensation process, following a power law dependence on the distance between sub-clusters. The exponent of the power law is close to two, as expected from a geometric model. This single exponent common to all the contractile lines implies that there exists a time regime during which an isomorphic contraction of the aster core continues during the condensation process. We analyze the observed contraction by using a model system with potential applicability in a wide range of emergent phenomena in randomly coupled active networks, which are prevalent in the cellular environment.</P>