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Transpiration Driven Electrokinetic Power Generator
Yun, Tae Gwang,Bae, Jaehyeong,Rothschild, Avner,Kim, Il-Doo American Chemical Society 2019 ACS NANO Vol.13 No.11
<P>Transpiration is the process by which water is carried in plants from the roots to the leaves where evaporation takes place. Here, we report a transpiration driven electrokinetic power generator (TEPG) that exploits capillary flow of water in an asymmetrically wetted cotton fabric coated with carbon black. Accumulation of protons induced by the electrical double layer formed at the solid (carbon black)/liquid (water) interface gives rise to potential difference between the wet and dry sides. The conductive carbon black coating channels electrical current driven by the pseudostreaming mechanism. A TEPG of 90 mm × 30 mm × 0.12 mm yields a maximum voltage of 0.53 V, maximum current of 3.91 μA, and maximum energy density of 1.14 mWh cm<SUP>-3</SUP>, depending on the loading of the carbon black. Multiple TEPGs generate enough power to light up a light-emitting diode (20 mA × 2.2 V) or charge a 1 F supercapacitor.</P> [FIG OMISSION]</BR>
자가농가 자료에 의한 Yorkshire 돈의 몇개 형질에 대한 유전력 및 유전상관
서영석(Young Syek Sye),(M . F . Rothschild),(M . Healey) 한국축산학회 1989 한국축산학회지 Vol.31 No.9
This study was initiated to estimate genetic and phenotypic parameters from data of Yorkshire swine from a large breeding farm. These parameters were to be used in the future to estimate individual pig breeding values and to estimate progress due to selection. Although estimates of the parameters were generally within range of previous literature values, some fell outside the parameter space. These results may have been the result of sampling, previous selection of pigs to participate in the performance test or lack of large numbers of data to estimate the parameters. Despite these problems, consideration should be given to using estimates of genetic parameters from on-the-farm data because these estimates may be more representative of the underlying population in which breeding values are to be estimated. Acknowledgements This paper is Journal Paper No. J-13500 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa, Project .1901. Dr. Sye thanks Yeungnam University for their support during his leave and to express his appreciation to Iowa State University for the partial financial support that he received during his stay. The assistance of Drs. L. Christian and K. Boldman is greatly appreciated.
Choi, Seon-Jin,Jang, Bong-Hoon,Lee, Seo-Jin,Min, Byoung Koun,Rothschild, Avner,Kim, Il-Doo American Chemical Society 2014 ACS APPLIED MATERIALS & INTERFACES Vol.6 No.4
Sensitive detection of acetone and hydrogen sulfide levels in exhaled human breath, serving as breath markers for some diseases such as diabetes and halitosis, may offer useful information for early diagnosis of these diseases. Exhaled breath analyzers using semiconductor metal oxide (SMO) gas sensors have attracted much attention because they offer low cost fabrication, miniaturization, and integration into portable devices for noninvasive medical diagnosis. However, SMO gas sensors often display cross sensitivity to interfering species. Therefore, selective real-time detection of specific disease markers is a major challenge that must be overcome to ensure reliable breath analysis. In this work, we report on highly sensitive and selective acetone and hydrogen sulfide detection achieved by sensitizing electrospun SnO2 nanofibers with reduced graphene oxide (RGO) nanosheets. SnO2 nanofibers mixed with a small amount (0.01 wt %) of RGO nanosheets exhibited sensitive response to hydrogen sulfide (R-air/R-gas = 34 at 5 ppm) at 200 degrees C, whereas sensitive acetone detection (R-air/R-gas = 10 at 5 ppm) was achieved by increasing the RGO loading to 5 wt % and raising the operation temperature to 350 degrees C. The detection limit of these sensors is predicted to be as low as 1 ppm for hydrogen sulfide and 100 ppb for acetone, respectively. These concentrations are much lower than in the exhaled breath of healthy people. This demonstrates that optimization of the RGO loading and the operation temperature of RGO-SnO2 nanocomposite gas sensors enables highly sensitive and selective detection of breath markers for the diagnosis of diabetes and halitosis.
Kim, Eunjoon,Naisbitt, Scott,Hsueh, Yi-Ping,Rao, Anuradha,Rothschild, Adam,Graig, Ann Marie,Sheng, Morgan 부산대학교 유전공학연구소 1997 분자생물학 연구보 Vol.13 No.-
The molecular mechanisms underlying the organization of ion channels and signsling molecules at the synaptic junction are largely unknown. Recently, members of the PSD-95/SAP90 family of synaptic MAGUK(menbrane-acssociated guanylate kinase) proteins have been shown to interact. via their NH_2-terminal PDZ domains, with certain ion channels(NMDA receptors and K^+channels). thereby promoting the clustering of these proteins. Although the function of the NH_2-terminal PDZ domains in relatively well characterized, the function of the Src homology 3(SH3) domain and the guanylate kinase-like(GK)domain in the COOH-terminal half of PSD-95 has remained obscure. WE now repoet the isolation of a novel synaptic protein. termed GKAP for guanylate kinase-associated protein. that binds directly to the GK domain of the known members of the mammalian PSD-95 family. GKAP shows a unique domain structure and appear to be a major constituent of the postsynaptic density. GKAP colocalizes and coimmunoprecipitates with PSD-95 in vivo,and colusters with PSD-95 and K^+ channels/parent lack of guanylate kinase enzymatic activity, the fact that the GK domain can as a site for protein-protein interaction has implications for the function of diverse GK-containing proteins(such as p55,ZO-1,and LIN-2/CASK).
Yang, Dae‐,Jin,Kamienchick, Itai,Youn, Doo Young,Rothschild, Avner,Kim, Il‐,Doo WILEY‐VCH Verlag 2010 Advanced functional materials Vol.20 No.24
<P><B>Abstract</B></P><P>This work presents a new route to suppress grain growth and tune the sensitivity and selectivity of nanocrystalline SnO<SUB>2</SUB> fibers. Unloaded and Pd‐loaded SnO<SUB>2</SUB> nanofiber mats are synthesized by electrospinning followed by hot‐pressing at 80 °C and calcination at 450 or 600 °C. The chemical composition and microstructure evolution as a function of Pd‐loading and calcination temperature are examined using EDS, XPS, XRD, SEM, and HRTEM. Highly porous fibrillar morphology with nanocrystalline fibers comprising SnO<SUB>2</SUB> crystallites decorated with tiny PdO crystallites is observed. The grain size of the SnO<SUB>2</SUB> crystallites in the layers that are calcined at 600 °C decreases with increasing Pd concentration from about 15 nm in the unloaded specimen to about 7 nm in the 40 mol% Pd‐loaded specimen, indicating that Pd‐loading could effectively suppress the SnO<SUB>2</SUB> grain growth during the calcination step. The Pd‐loaded SnO<SUB>2</SUB> sensors have 4 orders of magnitude higher resistivity and exhibit significantly enhanced sensitivity to H<SUB>2</SUB> and lower sensitivity to NO<SUB>2</SUB> compared to their unloaded counterparts. These observations are attributed to enhanced electron depletion at the surface of the PdO‐decorated SnO<SUB>2</SUB> crystallites and catalytic effect of PdO in promoting the oxidation of H<SUB>2</SUB> into H<SUB>2</SUB>O. These phenomena appear to have a much larger effect on the sensitivity of the Pd‐loaded sensors than the reduction in grain size.</P>