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( Thomas H. Tai ),( Areum Chun ),( Isabelle M. Henry ),( Kathie J. Ngo ),( Diana Burkart-waco ) 한국육종학회 2016 Plant Breeding and Biotechnology Vol.4 No.4
Rice seeds of the temperate japonica cultivar Kitaake were mutagenized with sodium azide alone and in combination with methyl nitrosourea. Using the reduced representation sequencing method Restriction Enzyme Sequence Comparative Analysis (RESCAN), the mutation densities, types and local sequence context were determined in the resulting M2 generation mutants. The results indicate that sodium azide is as effective alone as in combination with methyl nitrosourea in generating mutations in rice. In both cases, GC>AT transitions were the predominant mutation type and similar local sequence contexts were observed (5`-G-G-R-3` for sodium azide, 5`-R-G-R-3` for sodium azide plus methyl nitrosourea). Differences in local sequence context with those reported for another common chemical mutagen, ethyl methanesulfonate, suggests that rice mutant populations developed by combining mutants derived independently from sodium azide and ethyl methanesulfonate may exhibit a broader spectrum of mutations and mutant phenotypes.
Gemini lipopeptides as vaccine adjuvants: a new role for these versatile carriers
Lucía Daniela Grippo,Ivana Gabriela Reidel,María Inés García,Alexis Streu,Diana María Müller,Carolina Melania Veaute 대한백신학회 2020 Clinical and Experimental Vaccine Research Vol.9 No.2
The design of subunit vaccines requires new adjuvant systems. We designed and synthesized new lipopeptides (cysteine-based) of low molecular weight with different hydrophobic chains that dimerize becoming gemini lipopeptides. They were characterized and their adjuvant capacity was tested in mice by the inoculation of a protein antigen formulated with the lipopeptides, with and without the addition of CpG-oligodeoxynucleotides. Formulations were able to induce an immune response and produced no adverse effects. An adjuvant ability is described for the first time for this type of molecules.
Effects of the yaw angle on the aerodynamic behaviour of the Messina multi-box girder deck section
Diana, G.,Resta, F.,Zasso, A.,Belloli, M.,Rocchi, D. Techno-Press 2004 Wind and Structures, An International Journal (WAS Vol.7 No.1
An analysis refinement of the Messina Strait suspension bridge project has been recently required, concerning mainly the yaw angle effects on the multi-box deck section aerodynamics and the vortex shedding at low reduced velocities $V^*$. In particular the possible interaction of the axial flow with the large cross beams has been investigated. An original test rig has been designed at this purpose allowing for both forced motion and free motion aero elastic tests, varying the average angle of attack ${\alpha}$ and the deck yaw angle ${\beta}$. The hydraulic driven test rig allowed for both dynamic and stationary tests so that both the stationary coefficients and the flutter derivatives have been evaluated for each yaw angle. Specific free motion tests, taking advantage from the aeroelastic features of the section model, allowed also the study of the vortex shedding induced phenomena.
Diana M. Hernández-Corona,Esperanza Martínez-Abundis,Manuel González-Ortiz 한국식품영양과학회 2014 Journal of medicinal food Vol.17 No.7
The aim of this article is to evaluate the effect of fucoidan administration on insulin secretion and insulin sensitivity in overweight or obese adults. A randomized, double-blind, placebo-controlled clinical trial was carried out in 25 obese or overweight volunteers. Thirteen patients received an oral dose of 500 mg of fucoidan once daily before breakfast and 12 patients received placebo for 3 months. Before and after the intervention, fasting glucose and 2-h postload, total cholesterol, high-density lipoprotein cholesterol, triglycerides, and insulin levels were measured. Low-density lipoprotein cholesterol (LDL-C) and homeostasis model analysis formulas (HOMA) for b-cell function and insulin resistance were calculated. The results showed a significant decrease in diastolic blood pressure (71.7 – 12.2 vs. 67.8 – 13.8 mmHg; P < .05) and LDL-C (3.1 – 0.5 vs. 2.7 – 0.6 mmol/l; P < .01) with increase in insulin levels (60.6 – 24.0 vs. 78.6 – 32.4 pmol/l; P < .05), HOMA b-cell (35.0 – 20.8 vs. 50.6 – 18.7; P < .05) and HOMA IR (1.9 – 1.2 vs. 2.6 – 1.8; P < .05) were observed after fucoidan administration. We conclude that fucoidan administration during a 3-month period in overweight or obese adults decreased diastolic blood pressure and LDL-C concentrations, increasing insulin secretion and insulin resistance.
명승권,Diana D. McDonnell,Gene Kazinets,서홍관,Joel M. Moskowitz 대한의학회 2010 Journal of Korean medical science Vol.25 No.2
This cross-sectional study examined the relationships between household smoking restrictions and intentions to quit smoking among Korean American male smokers in California. We used data from the California Korean American Tobacco Use Survey (CKATUS), which was conducted in 2004 using computer-assisted telephone interviewing. Among the 2,545 respondents who participated in the CKATUS,the 387 male smokers who answered a question assessing their intention to quit smoking were included in the final analyses. In univariable analyses, smokers who reported having household smoking restrictions were more likely to intend to quit smoking as compared with those who did not (P<0.01). Other independent correlates of having an intention to quit smoking were being less than 50 yr of age, having spent more than 50% of one’s life in the US, being assimilated, and having other smokers in the household. In a multiple logistic regression analysis, the significant correlates of having an intention to quit smoking were household smoking restrictions (complete or partial restriction vs. no restriction on smoking; odds ratio, 2.54;95% confidence interval, 1.22-5.28) and absence of other smokers in the household. In conclusion, smoking restrictions in the household are associated with an intention to quit smoking among Korean American male smokers in California.
Improving accessibility and distinction between negative results in biomedical relation extraction
Sousa, Diana,Lamurias, Andre,Couto, Francisco M. Korea Genome Organization 2020 Genomics & informatics Vol.18 No.2
Accessible negative results are relevant for researchers and clinicians not only to limit their search space but also to prevent the costly re-exploration of research hypotheses. However, most biomedical relation extraction datasets do not seek to distinguish between a false and a negative relation among two biomedical entities. Furthermore, datasets created using distant supervision techniques also have some false negative relations that constitute undocumented/ unknown relations (missing from a knowledge base). We propose to improve the distinction between these concepts, by revising a subset of the relations marked as false on the phenotype-gene relations corpus and give the first steps to automatically distinguish between the false (F), negative (N), and unknown (U) results. Our work resulted in a sample of 127 manually annotated FNU relations and a weighted-F1 of 0.5609 for their automatic distinction. This work was developed during the 6th Biomedical Linked Annotation Hackathon (BLAH6).
Polymer-Cement Composites with Self-Healing Ability for Geothermal and Fossil Energy Applications
Childers, M. Ian,Nguyen, Manh-Thuong,Rod, Kenton A.,Koech, Phillip K.,Um, Wooyong,Chun, Jaehun,Glezakou, Vassiliki-Alexandra,Linn, Diana,Roosendaal, Timothy J.,Wietsma, Thomas W.,Huerta, Nicolas John American Chemical Society 2017 Chemistry of materials Vol.29 No.11
<P>Sealing of wellbores in geothermal and tight oil/gas reservoirs by filling the annulus with cement is a well-established practice. Failure of the cement as a result of physical and/or chemical stress is a common problem with serious environmental and financial consequences. Numerous alternative cement blends have been proposed for the oil and gas industry. Most of these possess poor mechanical properties, or are not designed to work in high temperature environments. This work reports on a novel polymer-cement composite with remarkable self-healing ability that maintains the required properties of typical wellbore cements and may be stable at most geothermal temperatures. We combine for the first time experimental analysis of physical and chemical properties with density functional theory simulations to evaluate cement performance. The thermal stability and mechanical strength are attributed to the formation of a number of chemical interactions between the polymer and cement matrix including covalent bonds, hydrogen bonding, and van der Waals interactions. Self-healing was demonstrated by sealing fractures with 0.3–0.5 mm apertures, 2 orders of magnitude larger than typical wellbore fractures. This polymer-cement composite represents a major advance in wellbore cementing that could improve the environmental safety and economics of enhanced geothermal energy and tight oil/gas production.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cmatex/2017/cmatex.2017.29.issue-11/acs.chemmater.7b00344/production/images/medium/cm-2017-00344c_0009.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cm7b00344'>ACS Electronic Supporting Info</A></P>