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Yang Gyu Ku,David Woolley,Michael Nichols 한국원예학회 2007 Horticulture, Environment, and Biotechnology Vol.48 No.1
Effects of repeated application of N-(2-chloro-4-pyridyl)-N'-phenylurea (CPPU) to foliage of asparagus seedlings on cladophyll morphology using growth analysis were investigated. Seven-week-old asparagus seedlings cvs. ‘Jersey Giant’ and ‘UC 157’ were sprayed to run off with CPPU at 10 mgㆍL?¹. Untreated seedlings were sprayed with tap water. The application of CPPU or tap water were repeated after 4, 8, and 12 weeks. Repeated CPPU foliar sprays significantly increased cladophyll area and cladophyll dry weight, but decreased root dry matter and the number of buds. Despite the higher cladophyll area, CPPU did not increase photosynthetic efficiency as measured by relative growth rate and net assimilation rate. ‘UC 157’ produced more bud numbers than ‘Jersey Giant’, but root dry weight did not differ between the two cultivars. ‘UC 157’ and ‘Jersey Giant’ had similar relative growth rates and net assimilation rates.
Fabrication of DNA-Templated Te and Bi<sub>2</sub>Te<sub>3</sub> Nanowires by Galvanic Displacement
Liu, Jianfei,Uprety, Bibek,Gyawali, Shailendra,Woolley, Adam T.,Myung, Nosang V.,Harb, John N. American Chemical Society 2013 Langmuir Vol.29 No.35
<P>This paper demonstrates the use of galvanic displacement to form continuous tellurium-based nanowires on DNA templates, enabling the conversion of metals, which can be deposited site-specifically, into other materials needed for device fabrication. Specifically, galvanic displacement reaction of copper and nickel nanowires is used to fabricate tellurium and bismuth telluride nanowires on λ-DNA templates. The method is simple, rapid, highly selective, and applicable to a number of different materials. In this study, continuous Ni and Cu nanowires are formed on DNA templates by seeding with Ag followed by electroless plating of the desired metal. These wires are then displaced by a galvanic displacement reaction where either Te or Bi<SUB>2</SUB>Te<SUB>3</SUB> is deposited from an acidic solution containing HTeO<SUB>2</SUB><SUP>+</SUP> ions or a combination of HTeO<SUB>2</SUB><SUP>+</SUP> and Bi<SUP>3+</SUP> ions, and the metal wire is simultaneously dissolved due to oxidation. Both tellurium and bismuth telluride wires can be formed from nickel templates. In contrast, copper templates only form tellurium nanowires under the conditions considered. Therefore, the composition of the metal being displaced can be used to influence the chemistry of the resulting nanowire. Galvanic displacement of metals deposited on DNA templates has the potential to enable site-specific fabrication of a variety of materials and, thereby, make an important contribution to the advancement of useful devices via self-assembled nanotemplates.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/langd5/2013/langd5.2013.29.issue-35/la402678j/production/images/medium/la-2013-02678j_0009.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/la402678j'>ACS Electronic Supporting Info</A></P>
Jae Bok Lee,노철영,Jonathan A Woolley 서울대학교행정대학원 2018 The Korean Journal of Policy Studies Vol.33 No.3
Health services should be accessible regardless of citizens’ gender, age, race, or insurance type, and geographic barriers should not interfere with this access. This article aims to assess the heterogeneous impacts of geographic barriers on inpatients’ hospital choices and to examine whether they vary according inpatients’ socioeconomic or insurance status. Using data on providers and inpatients obtained from the New York State Bureau of Health Informatics Office of Quality and Patient Safety for New York County (New York City’s borough of Manhattan) for 2009, we employed a discrete choice model. Our findings reveal that geographic barriers limit inpatients’ choices of hospitals more when they are of low socioeconomic status.
Yang Gyu Ku,D.J. Woolley,M.A. Nichols 한국원예학회 2006 Horticulture, Environment, and Biotechnology Vol.47 No.3
The purpose of this research was to investigate the effect of N-(2-chloro-4-pyridyl)-N’-phenylurea (CPPU) application to Asparagus officinalis foliage (foliar spray and foliar dip) and roots (crown soaking) on fern number, fern height, axillary bud break, cladophyll length and diameter, root number, and bud production, as these may affect photosynthetic rate or bud number limitation of yield. CPPU applied as a root soak decreased numbers of ferns, roots, and buds, fern height, fresh and dry weights (fern, rhizome, and root), and total dry weight. In contrast, CPPU as a foliar spray or dip stimulated the height of initial ferns, but decreased the height of subsequent ferns. All CPPU treatments significantly enhanced axillary bud break and stimulated axillary shoot length compared to the control. CPPU was also effective in promoting cladophyll diameter and length. However, CPPU applied as a foliar spray or dip did not influence the ratio of root mass to crown bud numbers. Root to shoot ratio of CPPU foliar spray and dip treated plants was lower than control plants, indicating that although CPPU as a foliar spray and dip increased fresh and dry weight of fern, number of roots and buds, and root dry weight were not increased in proportion.
Yang-Gyu Ku(구양규),David J. Woolley(데이빗 울리),Sung-Ju Ahn(안성주),Jeong-Hyun Lee(이정현) 한국원예학회 2010 원예과학기술지 Vol.28 No.2
CPPU 엽면 살포와 토양관주 처리에 따른 아스파라거스의 shoot(fern) 개수, fern 신장, 액아 타파, 뿌리의 수와 버드 생산에 미치는 영향을 조사하였다. CPPU 토양관주 처리는 fern생산을 촉진하였는데, 그러나CPPU 엽면살포(≥ 10 ㎎?L<SUP>-1</SUP>)처리에서는 ‘Jersey Giant’의 fern 개수를 감소시켰다. CPPU호르몬은 식물 체내에서 이동성이 느려 지상부 shoot 생산에 이동되는 억제물질을 감소시켜 아스파라거스fern 생산을 촉진할 것으로 제안된다. 대조적으로 CPPU호르몬을 직접 crown 버드에 토양관주를 처리하면 사이토키닌 호르몬의 전형처럼 버드 생성을 활발히 촉진한다. CPPU호르몬을 엽면시비와 토양관주를 처리하면 초기의 fern 신장은 촉진되지만, CPPU 호르몬 처리 이후의 자라는 fern 신장은 오히려 감소된다. 모든 CPPU 처리는 대조구와 비교해서 액아 타파를 촉진하였다. CPPU 호르몬을 토양관주 처리하면 fern 생산에 효율적일지라도 뿌리의 수나 crown 버드 생산에 영향을 미치지 않았다. The effect of foliar spray and soil drench applications of N1-(2-chloro-4-pyridyl)-N3-phenylurea (CPPU) on shoot (fern) numbers, fern height, axillary bud break, root number and bud production were investigated. A soil drench with CPPU stimulated fern production, but applying CPPU (≥ 10 ㎎?L<SUP>-1</SUP>) to foliage of ‘Jersey Giant’ seedlings reduced the numbers of ferns. Since CPPU is poorly transported these results suggest that CPPU may be stimulating the production in the fern of a mobile inhibitor of shoot production. In contrast, CPPU applied directly to the crown buds using a soil drench could act directly in stimulating bud outgrowth, as is typical of cytokinin-like substances. CPPU as a foliar spray or soil drench stimulated the height of initial ferns, but decreased the height of subsequent ferns. All CPPU treatments significantly enhanced axillary bud break of the fern compared to the control. Although CPPU, applied as a soil drench, was effective in promoting fern production, it did not influence root and crown bud numbers.