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WANG, HONG JIANG,AN, DUCK SOON,LEE, DONG SUN ational Association for Food Protection 2016 Journal of food protection Vol.79 No.9
<B>ABSTRACT</B><P>Agar-based films with multiple functions (CO2 absorption, water vapor absorption, and antimicrobial activity) were developed, tested for their properties, and then applied to the packaging of fresh shiitake mushrooms as an insert label. The films were cast from an agar-based aqueous solution containing a dissolving plasticizer (glycerol), a CO2 absorbent (sodium carbonate [SC] alone or a combination of SC and sodium glycinate [SC-SG]), and a volatile antimicrobial agent (carvacrol [CRV]). The agar of the film matrix is designed to serve as a water vapor absorbent. The multifunctional films tended to have poor mechanical properties, with a hard texture and an opaque and yellowish color. The CO2 absorbent, either SC alone or SC-SG, affected CRV retention and release along with the CO2 and water vapor absorption behavior. Both films (SC-CRV and SC-SG-CRV films) showed good inhibitory effects against Pseudomonas fluorescens and Saccharomyces cerevisiae. SC-CRV film had a higher and faster CO2 absorption property, higher retention and extended release of CRV, and lower and slower water vapor absorption and was assessed to be better suited for use in shiitake mushroom packaging. The packaging in which the SC-CRV film with an appropriate amount of CRV was used as an insert label was able to generate the desired atmosphere and less moisture condensation inside the package, producing the best preservation of quality in terms of mushroom color, firmness, flavor score, and microbial counts after 6 days of storage at 10°C. A tailored modified atmosphere packaging system using multifunctional film would be useful in the preservation of CO2-sensitive fresh commodities.</P>
Jiang, Xingfen,Xiu, Qinglei,Zhou, Jianrong,Yang, Jianqing,Tan, Jinhao,Yang, Wenqin,Zhang, Lianjun,Xia, Yuanguang,Zhou, Xiaojuan,Zhou, Jianjin,Zhu, Lin,Teng, Haiyun,Yang, Gui-an,Song, Yushou,Sun, Zhiji Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.6
Gadolinium oxysulfide (GOS) is regarded as a novel scintillator for the realization of ultra-high spatial resolution in neutron imaging. Monte Carlo simulations of GOS scintillator show that the capability of its spatial resolution is towards the micron level. Through the time-of-flight method, the light output of a GOS scintillator was measured to be 217 photons per captured neutron, ~100 times lower than that of a ZnS/LiF:Ag scintillator. A detector prototype has been developed to evaluate the imaging solution with the GOS scintillator by neutron beam tests. The measured spatial resolution is ~36 ㎛ (28 line pairs/mm) at the modulation transfer function (MTF) of 10%, mainly limited by the low experimental collimation ratio of the beamline. The weak light output of the GOS scintillator requires an enormous increase in the neutron flux to reduce the exposure time for practical applications.
Jiang, Jun,Bai, Zi Long,Chen, Zhi Hui,He, Long,Zhang, David Wei,Zhang, Qing Hua,Shi, Jin An,Park, Min Hyuk,Scott, James F.,Hwang, Cheol Seong,Jiang, An Quan Nature Publishing Group, a division of Macmillan P 2018 NATURE MATERIALS Vol.17 No.1
Erasable conductive domain walls in insulating ferroelectric thin films can be used for non-destructive electrical read-out of the polarization states in ferroelectric memories. Still, the domain-wall currents extracted by these devices have not yet reached the intensity and stability required to drive read-out circuits operating at high speeds. This study demonstrated non-destructive read-out of digital data stored using specific domain-wall configurations in epitaxial BiFeO<SUB>3</SUB> thin films formed in mesa-geometry structures. Partially switched domains, which enable the formation of conductive walls during the read operation, spontaneously retract when the read voltage is removed, reducing the accumulation of mobile defects at the domain walls and potentially improving the device stability. Three-terminal memory devices produced 14 nA read currents at an operating voltage of 5 V, and operated up to T = 85 °C. The gap length can also be smaller than the film thickness, allowing the realization of ferroelectric memories with device dimensions far below 100 nm.
Jiang, W.,Woo, W.,An, G.B.,Park, J.U. Scientific and Technical Press ; Elsevier Science 2013 Materials & design Vol.51 No.-
Temperature and residual stresses were thermo-mechanically modeled in a 1000mm long welding plate based on the simplified variable length heat source. The stress relaxations were simulated as a function of the plate length after cutting the initial weld specimen by using an element removal method and treating the prior stress field as the next cutting origins. Meanwhile residual stresses were sequentially measured in a weld with the length of 300mm and cut welds having 150, 10mm lengths for comparison using neutron diffraction. Residual stresses from both the modeling and experimental results exponentially decrease from about 370 to 0MPa as the total weld plate length decreases from 300mm to 10mm. Such stress relaxation by the cutting length is correlated to the exponential decrease law based on the St. Venant's principle. It suggests that the minimum cutting length about 300mm is necessary to prevent the stress relaxation less than 3% of the initial stresses in a high-strength steel weld.
UBR2 mediates transcriptional silencing during spermatogenesis via histone ubiquitination
An, Jee Young,Kim, Eun-A.,Jiang, Yonghua,Zakrzewska, Adriana,Kim, Dong Eun,Lee, Min Jae,Mook-Jung, Inhee,Zhang, Yi,Kwon, Yong Tae Proceedings of the National Academy of Sciences 2010 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.107 No.5
<P>Ubiquitination of histones provides an important mechanism regulating chromatin remodeling and gene expression. Recent studies have revealed ubiquitin ligases involved in histone ubiquitination, yet the responsible enzymes and the function of histone ubiquitination in spermatogenesis remain unclear. We have previously shown that mice lacking the ubiquitin ligase UBR2, one of the recognition E3 components of the N-end rule proteolytic pathway, are infertile associated with meiotic arrest at prophase I. We here show that UBR2 localizes to meiotic chromatin regions, including unsynapsed axial elements linked to chromatin inactivation, and mediates transcriptional silencing via the ubiquitination of histone H2A. UBR2 interacts with the ubiquitin conjugating enzyme HR6B and its substrate H2A and promotes the HR6B-H2A interaction and the HR6B-to-H2A transfer of ubiquitin. UBR2 and ubiquitinated H2A (uH2A) spatiotemporally mark meiotic chromatin regions subject to transcriptional silencing, and UBR2-deficient spermatocytes fail to induce the ubiquitination of H2A during meiosis. UBR2-deficient spermatocytes are profoundly impaired in chromosome-wide transcriptional silencing of genes linked to unsynapsed axes of the X and Y chromosomes. Our findings suggest that insufficiency in UBR2-dependent histone ubiquitination triggers a pachytene checkpoint system, providing a new insight into chromatin remodeling and gene expression regulation.</P>
A Resistive Memory in Semiconducting BiFeO<sub>3</sub> Thin‐Film Capacitors
Jiang, An Quan,Wang, Can,Jin, Kui Juan,Liu, Xiao Bing,Scott, James F.,Hwang, Cheol Seong,Tang, Ting Ao,Lu, Hui Bin,Yang, Guo Zhen WILEY‐VCH Verlag 2011 ADVANCED MATERIALS Vol.23 No.10
<P><B>A ferroelectric‐resistive random access memory consisting of a conductive BiFeO<SUB>3</SUB></B> epitaxial thin film with a unipolar diode current modulated by electric polarization orientation is reported. This device has a memory that lasts for months, a sufficiently high on current and on/off ratio to permit ordinary sense amplifiers to measure “1” or “0”, and is fully compatible with complementary metal‐oxide semiconductor processing. </P>
Fast 3D reconstruction method based on UAV photography
Jiang-An Wang,Huang‐Te Ma,Chun-Mei Wang,Yong-Jie He 한국전자통신연구원 2018 ETRI Journal Vol.40 No.6
3D reconstruction of urban architecture, land, and roads is an important part of building a “digital city.” Unmanned aerial vehicles (UAVs) are gradually replacing other platforms, such as satellites and aircraft, in geographical image collection; the reason for this is not only lower cost and higher efficiency, but also higher data accuracy and a larger amount of obtained information. Recent 3D reconstruction algorithms have a high degree of automation, but their computation time is long and the reconstruction models may have many voids. This paper decomposes the object into multiple regional parallel reconstructions using the clustering principle, to reduce the computation time and improve the model quality. It is proposed to detect the planar area under low resolution, and then reduce the number of point clouds in the complex area.