The effect of the modification methods on the catalytic performance of activated carbon supported CuO-ZnO catalysts

Huamei Duan,Yunxia Yang3,Jim Patel,Nick Burke,Yuchun Zhai,Paul A. Webley,Dengfu Chen,Mujun Long 한국탄소학회 2018 Carbon Letters Vol.25 No.-

Activated carbon (AC) was modified by ammonium persulphate or nitric acid, respectively. AC and the modified materials were used as catalyst supports. The oxygen groups were introduced in the supports during the modifications. All the supports were characterized by N2-physisorption, Raman, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and thermogravimetric analysis. Methanol synthesis catalysts were prepared through wet impregnation of copper nitrate and zinc nitrate on the supports followed by thermal decomposition. These catalysts were measured by the means of N2-physisorption, X-ray diffraction, XPS, temperature programmed reduction and TEM tests. The catalytic performances of the prepared catalysts were compared with a commercial catalyst (CZA) in this work. The results showed that the methanol production rate of AC-CZ (23 mmol-CH3OH/(g-Cu·h)) was higher, on Cu loading basis, than that of CZA (9 mmol-CH3OH/(g-Cu·h)). We also found that the modification methods produced strong metal-support interactions leading to poor catalytic performance. AC without any modification can prompt the catalytic performance of the resulted catalyst.

HBC media를 이용한 살수여상 공정에서 온도와 내부순환비의 영향 평가

이형집,독고석,양기해,정팔진 대한상하수도학회 2003 상하수도학회지 Vol.17 No.6

Trickling filters have been used in the biological treatment of municipal and industrial wastewater for many years. They are nonsubmerged fixed-film biological reactors using rock or plastic packing media over which wastewater is distributed continuously. Recently new packing medium with high specific surface area and low specific gravity has been developed instead of gravel. In this study the trickling filter system using polyethylene HBC media was applied for treating wastewater from a restaurant. The water quality of treated water according to the variations of recycling ratio, DO, OCD, and temperature were monitored in the period of 90 days. Based on the results from this study, it can be concluded that the higher treatment efficiency is obtained from the condition of low recycling ratio (around N = 1∼10), Hardly has the recycling ratio an influence on the efficiency at low surface loading, while it is vice versa at high surface loading. Trickling filter system has no merit when the temperature goes down under 5℃ compared with the conventional activated sludge system.

Detection of epistatic interaction of grain weight QTLs in rice

Paul Yang,Feng Xue Jin,Ju Won Kang,Sang Nag Ahn 한국육종학회 2011 한국육종학회 학술발표회 발표요지 Vol.43 No.-

Synaptic behaviors of thin-film transistor with a Pt/HfO<i> _x </i>/n-type indium–gallium–zinc oxide gate stack

Yang, Paul,Park, Daehoon,Beom, Keonwon,Kim, Hyung Jun,Kang, Chi Jung,Yoon, Tae-Sik IOP 2018 Nanotechnology Vol.29 No.29

<P>We report a variety of synaptic behaviors in a thin-film transistor (TFT) with a metal-oxide-semiconductor gate stack that has a Pt/HfO<I> <SUB>x</SUB> </I>/n-type indium–gallium–zinc oxide (n-IGZO) structure. The three-terminal synaptic TFT exhibits a tunable synaptic weight with a drain current modulation upon repeated application of gate and drain voltages. The synaptic weight modulation is analog, voltage-polarity dependent reversible, and strong with a dynamic range of multiple orders of magnitude (>10<SUP>4</SUP>). This modulation process emulates biological synaptic potentiation, depression, excitatory-postsynaptic current, paired-pulse facilitation, and short-term to long-term memory transition behaviors as a result of repeated pulsing with respect to the pulse amplitude, width, repetition number, and the interval between pulses. These synaptic behaviors are interpreted based on the changes in the capacitance of the Pt/HfO<I> <SUB>x</SUB> </I>/n-IGZO gate stack, the channel mobility, and the threshold voltage that result from the redistribution of oxygen ions by the applied gate voltage. These results demonstrate the potential of this structure for three-terminal synaptic transistor using the gate stack composed of the HfO<I> <SUB>x</SUB> </I> gate insulator and the IGZO channel layer.</P>

Strategies to Increase Exercise Compliance and Adherence for Breast Cancer Survivors: A Descriptive Review

Yang, Paul,Foroughi, Nasim,Kilbreath, Sharon International Academy of Physical Therapy Research 2010 Journal of International Academy of Physical Ther Vol.1 No.2

Breast cancer is the most frequently diagnosed cancer primarily affecting women and negatively impacting the individuals, families, and the health care system. Despite the well-known benefits of exercise for breast cancer survivors, rate of physical activity declines during adjuvant therapy and may not return to pre-diagnosis levels. In addition, low levels of adherence to exercise have been observed in this cohort. The challenge is to identify strategies that are effective in promoting exercise adherence. Several of the studies use social cognitive theory as a theoretical framework to design exercise interventions that encourage adherence. Within and without this framework, they have implemented interventions within the home and gym-based environments. Strategies used to encourage adherence to exercise programs and which are readily implemented in most situations have included distribution of print materials and pedometers, as well as recommendation from the oncologist. Other strategies that may be less feasible have included provision of trainers, gym memberships, regular phone-calls, and psychologist-lead stress management sessions.

Marker Assisted Development and Characterization of Beta-Carotene Rice

Paul Yang,Mi Hee Song,Sun Hwa Ha,Jae Kwang Kim,Jong Seok Park,Sang Nag Ahn 한국육종학회 2011 한국육종학회지 Vol.43 No.5

Beta-carotene producing transformants were produced in the background of 'Nagdongbyeo', a Japonica rice cultivar. Introgression of the carotenoid locus in the transformant, PAC4-2 into the elite cultivar 'Ilpumbyeo' was started. To initiate a backcrossing program, we surveyed 220 SSR markers and found that 38% of them were polymorphic between 'Ilpumbyeo' as a recurrent parent and the PAC4-2 as a recipient parent. The selection strategy comprising foreground and background selection was employed. First, foreground selection was practiced in BC1, BC2, and BC3 generations using the transgene specific PCR-based marker in addition to visual scoring of the seed color. Marker-based background selection combined with phenotypic selection was employed from BC3F2 to BC3F4 generations. Blast search indicated that the transgene PAC4-2 was located between SSR markers, RM6 and RM482. 240 BC3F3 and 63 BC3F4 lines were evaluated for four agronomic traits including days to heading. Most of the lines were similar to Ilpumbyeo in agronomic traits evaluated. The percentage of PAC4-2 genome ranged from 4% to 21% with a mean of 12.5%, which was higher than the expected for an unselected BC3 backcross population. This could be explained by the fact that two genes for beta-carotene and the stripe virus resistance were targeted in this study. We selected 10 representative BC3F5 lines from 63 BC3F4 lines based on agronomic traits and carotenoids content. The selection strategy would be appropriate for the introgression of beta-carotene gene in a breeding program.

Marker-Aided Selection and Characteristics of β-Carotene Rice

Paul Yang,Mi-Hee Song,Sun-Hwa Ha,Sang-Nag Ahn 한국작물학회 2010 한국작물학회 학술발표대회 논문집 Vol.2010 No.04

β-carotene producing transformants were produced in the background of "Nagdong", a japonica rice cultivar. Introgression of the caroteniod locus into the elite cultivar "Ilpum". Was started to initiate a backcrossing program, we surveyed 220 SSR markers and found that 38% of them were polymorphic between the “Ilpum” as the recurrent parent and "Nagdong" transfomed as a recipient parent. First, backcross progenies have been produced and genotyped by the transgene specific PCR-based marker. Blast search indicated that the transgene PAC4-2 was located between SSR markers, RM5631 and RM5916. We produced 240 BC3F2 plants derived from thirteen BC3F1 plants containing the caroteniod gene. To develop near isogenic line, additional experiments including target and background selection are being performed using SSR markers. Traits of agronomic importance such as heading date, panicle number and culm length will also be evaluated. The results will be discussed.

Characteristics of β-carotene rice developed using Marker-assisted selection

Paul Yang,Mi Hee Song,Sun Hwa Ha,Tae Hoon Ryu,Sang Nag Ahn 한국육종학회 2010 한국육종학회 학술발표회 발표요지 Vol.42 No.1

Harnessing an RNA-mediated chaperone for the assembly of influenza hemagglutinin in an immunologically relevant conformation

Yang, Seung Won,Jang, Yo Han,Kwon, Soon Bin,Lee, Yoon Jae,Chae, Wonil,Byun, Young Ho,Kim, Paul,Park, Chan,Lee, Young Jae,Kim, Choon Kang,Kim, Young Seok,Choi, Seong Il,Seong, Baik Lin Federation of American Societies for Experimental 2018 The FASEB Journal Vol.32 No.5

<P>A novel protein-folding function of RNA has been recognized, which can outperform previously known molecular chaperone proteins. The RNA as a molecular chaperone (chaperna) activity is intrinsic to some ribozymes and is operational during viral infections. Our purpose was to test whether influenza hemagglutinin (HA) can be assembled in a soluble, trimeric, and immunologically activating conformation by means of an RNA molecular chaperone (chaperna) activity. An RNA-interacting domain (RID) from the host being immunized was selected as a docking tag for RNA binding, which served as a transducer for the chaperna function for <I>de novo</I> folding and trimeric assembly of RID-HA1. Mutations that affect tRNA binding greatly increased the soluble aggregation defective in trimer assembly, suggesting that RNA interaction critically controls the kinetic network in the folding/assembly pathway. Immunization of mice resulted in strong hemagglutination inhibition and high titers of a neutralizing antibody, providing sterile protection against a lethal challenge and confirming the immunologically relevant HA conformation. The results may be translated into a rapid response to a new influenza pandemic. The harnessing of the novel chaperna described herein with immunologically tailored antigen-folding functions should serve as a robust prophylactic and diagnostic tool for viral infections.—Yang, S. W., Jang, Y. H., Kwon, S. B., Lee, Y. J., Chae, W., Byun, Y. H., Kim, P., Park, C., Lee, Y. J., Kim, C. K., Kim, Y. S., Choi, S. I., Seong, B. L. Harnessing an RNA-mediated chaperone for the assembly of influenza hemagglutinin in an immunologically relevant conformation.</P>

Strategies to Increase Exercise Compliance and Adherence for Breast Cancer Survivors: A Descriptive Review.

Paul Yang,Nasim Foroughi,Sharon Kilbreath 국제물리치료학회 2010 Journal of International Academy of Physical Ther Vol.1 No.2

Breast cancer is the most frequently diagnosed cancer primarily affecting women and negatively impacting the individuals, families, and the health care system. Despite the well-known benefits of exercise for breast cancer survivors, rate of physical activity declines during adjuvant therapy and may not return to pre-diagnosis levels. In addition, low levels of adherence to exercise have been observed in this cohort. The challenge is to identify strategies that are effective in promoting exercise adherence. Several of the studies use social cognitive theory as a theoretical framework to design exercise interventions that encourage adherence. Within and without this framework, they have implemented interventions within the home and gym-based environments. Strategies used to encourage adherence to exercise programs and which are readily implemented in most situations have included distribution of print materials and pedometers, as well as recommendation from the oncologist. Other strategies that may be less feasible have included provision of trainers, gym memberships, regular phone-calls, and psychologist-lead stress management sessions.