Silica colloidal crystals with uni- and multi-photonic bandgaps and controlled reflective properties

Piret, F.,Kwon, Y.-U.,Su, B.-L. Elsevier 2009 Chemical physics letters Vol.472 No.4

<P><B>Graphical abstract</B></P><P>The present Letter introduces a new concept in the field of 3D photonic crystals, for the first time, we prepared the 3D silica colloidal crystals containing multi-photonic bandgaps. This is achieved by creating multiple layer structures of two (or more) colloidal crystals with different lattice parameters. Each layer will diffract lights of its characteristic wavelength and the reflectance spectra are expected to present as many reflectance peaks as the number of layers.</P><ce:figure></ce:figure> <P><B>Abstract</B></P><P>High quality silica colloidal crystals with one or multi-photonic bandgaps that can be controlled in the whole range of the visible and near infrared lights have been designed. A comprehensive set of parameters that can predetermine the particle sizes from 150 to 750nm of the resulting silica colloids and their polydispersities was established. Self-assembly of such silica spheres produced highly organized colloidal crystals, leading to the photonic crystals of which the reflectance wavelengths can cover the whole range of visible lights and parts of the ultraviolet and infrared lights. Multiple deposition of silica spheres of two or more different sizes produced a heterostructured with multiple photonic bandgaps.</P>

Dietary Modification for Reducing Electrical Conductivity of Piggery Wastewater

Yu, I.T.,Su, J.J.,Wu, J.F.,Lee, S.L.,Ju, C.C.,Yen, H.T. Asian Australasian Association of Animal Productio 2005 Animal Bioscience Vol.18 No.9

A total of 108 pigs (including 36 starters, 36 growers, and 36 finishers) were randomly allocated to six treatments, which involved a 2 (Crude Protein (CP): 100 and 80% of control diet)${\times}$3 (Ca, P, Salt (CPS): 100, 80 and 60% of control diet) factorial design to evaluate the effectiveness of reducing CP and CPS in reducing wastewater EC in different stages. Another 72 starters were adopted to examine the effect of the six treatment diets (as mentioned above) on the growth performance of pigs. Activated carbon and Reverse Osmosis System (RO) were adopted to examine the reducing efficiency of wastewater EC, and ion analysis was also applied to compare with the wastewater EC in different stages of the metabolism trial. The results of wastewater EC of the six treatment diets in different stages of metabolism trial demonstrated that diminishing dietary CP or CPS decreased wastewater EC. The largest decrease of EC was approximately 30%, and was achieved with 20 and 40% reduced dietary CP and CPS, respectively. Pig growth performance deteriorated somewhat when dietary CP or CPS was diminished. Wastewater ion concentration was not always consistent with dietary CP or CPS content, except for $NO_2^{-}$, $NH_4^{+}$ and $K^{+}$, which were positively correlated with dietary CP or CPS in different stages. Activated carbon is not effective for reducing wastewater EC, while, RO system is effective (90% elimination rate) in reducing wastewater EC, but the EC of concentrated (excreted) water is around 10% higher than that of intact wastewater, representing an additional problem besides the high cost of RO system treatment.

A TWO-DIMENSIONAL FINITE VOLUME METHOD FOR TRANSIENT SIMULATION OF TIME- AND SCALE-DEPENDENT TRANSPORT IN HETEROGENEOUS AQUIFER SYSTEMS

Liu, F.,Turner, I.,Ahn, V.,Su, N. 한국전산응용수학회 2003 Journal of applied mathematics & informatics Vol.11 No.1

In this paper, solute transport in heterogeneous aquifers using a modified Fokker-Planck equation (MFPE) is investigated. This newly developed mathematical model is characterised with a time-, scale-dependent dispersivity. A two-dimensional finite volume quadrilateral mesh method (FVQMM) based on a quadrilateral background interpolation mesh is developed for analysing the model. The FVQMM transforms the coupled non-linear partial differential equations into a system of differential equations, which is solved using backward differentiation formulae of order one through five in order to advance the solution in time. Three examples are presented to demonstrate the model verification and utility. Henry's classic benchmark problem is used to show that the MFPE captures significant features of transport phenomena in heterogeneous porous media including enhanced transport of salt in the upper layer due to its parameters that represent the dependence of transport processes on scale and time. The time and scale effects are investigated. Numerical results are compared with published results on the some problems.

Effects of Inclusion Levels of Wheat Bran and Body Weight on Ileal and Fecal Digestibility in Growing Pigs

Huang, Q.,Su, Y.B.,Li, D.F.,Liu, L.,Huang, C.F.,Zhu, Z.P.,Lai, C.H. Asian Australasian Association of Animal Productio 2015 Animal Bioscience Vol.28 No.6

The objective of this study was to determine the effects of graded inclusions of wheat bran (0%, 9.65%, 48.25% wheat bran) and two growth stages (from 32.5 to 47.2 kg and 59.4 to 78.7 kg, respectively) on the apparent ileal digestibility (AID), apparent total tract digestibility (ATTD) and hindgut fermentation of nutrients and energy in growing pigs. Six light pigs (initial body weight [BW] $32.5{\pm}2.1kg$) and six heavy pigs (initial BW $59.4{\pm}3.2kg$) were surgically prepared with a T-cannula in the distal ileum. A difference method was used to calculate the nutrient and energy digestibility of wheat bran by means of comparison with a basal diet consisting of corn-soybean meal (0% wheat bran). Two additional diets were formulated by replacing 9.65% and 48.25% wheat bran by the basal diet, respectively. Each group of pigs was allotted to a $6{\times}3$ Youden square design, and pigs were fed to three experimental diets during three 11-d periods. Hindgut fermentation values were calculated as the differences between ATTD and AID values. For the wheat bran diets, the AID and ATTD of dry matter (DM), ash, organic matter (OM), carbohydrates (CHO), gross energy (GE), and digestible energy (DE) decreased with increasing inclusion levels of wheat bran (p<0.05). While only AID of CHO and ATTD of DM, ash, OM, CHO, GE, and DE content differed (p<0.05) when considering the BW effect. For the wheat bran ingredient, there was a wider variation effect (p<0.01) on the nutrient and energy digestibility of wheat bran in 9.65% inclusion level due to the coefficient of variation (CV) of the nutrient and energy digestibility being higher at 9.65% compared to 48.25% inclusion level of wheat bran. Digestible energy content of wheat bran at 48.25% inclusion level (4.8 and 6.7 MJ/kg of DM, respectively) fermented by hindgut was significantly higher (p<0.05) than that in 9.65% wheat bran inclusion level (2.56 and 2.12 MJ/kg of DM, respectively), which was also affected (p<0.05) by two growth stages. This increase in hindgut fermentation caused the difference in ileal DE (p<0.05) to disappear at total tract level. All in all, increasing wheat bran levels in diets negatively influences the digestibility of some nutrients in pigs, while it positively affects the DE fermentation in the hindgut.

AN ITERATIVE METHOD FOR SYMMETRIC INDEFINITE LINEAR SYSTEMS

Walker, Homer-F.,Yi, Su-Cheol Korean Mathematical Society 2004 대한수학회논문집 Vol.19 No.2

For solving symmetric systems of linear equations, it is shown that a new Krylov subspace method can be obtained. The new approach is one of the projection methods, and we call it the projection method for convenience in this paper. The projection method maintains the residual vector like simpler GMRES, symmetric QMR, SYMMLQ, and MINRES. By studying the quasiminimal residual method, we show that an extended projection method and the scaled symmetric QMR method are equivalent.

An Impedance-Transduced Chemiresistor with a Porous Carbon Channel for Rapid, Nonenzymatic, Glucose Sensing

Ogata, Alana F.,Song, Seok-Won,Cho, Su-Ho,Koo, Won-Tae,Jang, Ji-Soo,Jeong, Yong Jin,Kim, Min-Hyeok,Cheong, Jun Young,Penner, Reginald M.,Kim, Il-Doo American Chemical Society 2018 ANALYTICAL CHEMISTRY - Vol.90 No.15

<P>A new type of chemiresistor, the impedance-transduced chemiresistor (ITCR), is described for the rapid analysis of glucose. The ITCR exploits porous, high surface area, fluorine-doped carbon nanofibers prepared by electrospinning of fluorinated polymer nanofibers followed by pyrolysis. These nanofibers are functionalized with a boronic acid receptor and stabilized by Nafion to form the ITCR channel for glucose detection. The recognition and binding of glucose by the ITCR is detected by measuring its electrical impedance at a single frequency. The analysis frequency is selected by measuring the signal-to-noise (<I>S</I>/<I>N</I>) for glucose detection across 5 orders of magnitude, evaluating both the imaginary and real components of the complex impedance. On the basis of this analysis, an optimal frequency of 13 kHz is selected for glucose detection, yielding an <I>S</I>/<I>N</I> ratio of 60-100 for [glucose] = 5 mM using the change in the total impedance, Δ<I>Z</I>. The resulting ITCR glucose sensor shows a rapid analysis time (<8 s), low coefficient of variation for a series of sensors (<10%), an analysis range of 50 μM to 5 mM, and excellent specificity versus fructose, ascorbic acid, and uric acid. These metrics for the ITCR are obtained using a sample size as small as 5 μL.</P> [FIG OMISSION]</BR>

Genome Sequence of the Probiotic Bacterium Bifidobacterium animalis subsp. lactis AD011

Kim, Jihyun F.,Jeong, Haeyoung,Yu, Dong Su,Choi, Sang-Haeng,Hur, Cheol-Goo,Park, Myeong-Soo,Yoon, Sung Ho,Kim, Dae-Won,Ji, Geun Eog,Park, Hong-Seog,Oh, Tae Kwang American Society for Microbiology 2009 Journal of Bacteriology Vol.191 No.2

<B>ABSTRACT</B><P><I>Bifidobacterium animalis</I> subsp. <I>lactis</I> is a probiotic bacterium that naturally inhabits the guts of most mammals, including humans. Here we report the complete genome sequence of <I>B. animalis</I> subsp. <I>lactis</I> AD011 that was isolated from an infant fecal sample. Biological functions encoded in a single circular chromosome of 1,933,695 bp, smallest among the completely sequenced bifidobacterial genomes, are suggestive of their probiotic functions, such as utilization of bifidogenic factors and a variety of glycosidic enzymes and biosynthesis of polysaccharides.</P>

Mapping of Quantitative Trait Loci on Porcine Chromosome 7 Using Combined Data Analysis

Zuo, B.,Xiong, Y.Z.,Su, Y.H.,Deng, C.Y.,Lei, M.G.,Zheng, R.,Jiang, S.W.,Li, F.E. Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.10

To further investigate the regions on porcine chromosome 7 that are responsible for economically important traits, phenotypic data from a total of 287 F2 individuals were collected and analyzed from 1998 to 2000. All animals were genotyped for eight microsatellite loci spanning the length of chromosome 7. QTL analysis was performed using interval mapping under the line-cross model. A permutation test was used to establish significance levels associated with QTL effects. Observed QTL effects were (chromosomewide significance, position of maximum significance in centimorgans): Birth weight (<0.01, 3); Carcass length (<0.05, 80); Longissimus muscle area (<0.01, 69); Skin percentage (<0.01, 69); Bone percentage (<0.01, 74); Fat depths at shoulder (<0.05, 54);Mean fat depth (<0.05, 81); Moisture in m. Longissimus Dorsi (<0.05, 88). Additional evidence was also found which suggested QTL for dressing percentage and fat depths at buttock. This study offers confirmation of several QTL affecting growth and carcass traits on SSC7 and provides an important step in the search for the actual major genes involved in the traits of economic interest.

COMMON FEATURES OF SPATIAL ORIENTATION OF DISK GALAXIES IN THE COMA AND VIRGO CLUSTER

Hul F. X.,Wu G. X.,SU H. J.,LIU Y. Z.,YUAN Q. R. The Korean Astronomical Society 1996 Journal of The Korean Astronomical Society Vol.29 No.suppl1

Based on the database of 128 disk galaxies (66 SO, 62 S and Irr) mailnly compiled from Kent and Gunn (1982) and Doi et a1.(1995) which is complete down to m < 15.6 mag within a radius of $3^{\circ}$, the orientation of spin vectors of disk galaxies of the Coma cluster has been analyzed. The results confirm the morphological dependence of the orientation of disk galaxies found from the analsis of the Virgo cluster. Common features of orientation of disk galaxies of both clusters are outlined.

Characterization of the root-predominant gene promoter HPX1 in transgenic rice plants

Park, Su-Hyun,Jeong, Jin Seo,Han, Eun Hyang,Redillas, Mark C.F.R.,Bang, Seung Woon,Jung, Harin,Kim, Youn Shic,Kim, Ju-Kon 한국식물생명공학회 2013 Plant biotechnology reports Vol.7 No.3

Gene promoter(s) specialized in root tissues is an important component for crop biotechnology. In our current study, we report results of promoter analysis of the HPX1, a gene expressed predominantly in roots. The HPX1 promoter regions were predicted, linked to the gfp reporter gene, and transformed into rice. Promoter activities were analyzed in various organs and tissues of six independent transgenic HPX1:gfp plants using the fluorescent microscopy and q-RT-PCR methods. GFP fluorescence levels were high in root elongation regions but not in root apex and cap of the HPX1:gfp plants. Very low levels of GFP fluorescence were observed in anthers and leaves. Levels of promoter activities were 16- to 190-fold higher in roots than in leaves of the HPX1:gfp plants. The HPX1 promoter directs high levels of gene expression in root tissues producing GFP levels up to 0.39 % of the total soluble protein. Thus, the HPX1 promoter is predominantly active in the root elongation region during the vegetative stage of growth.