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Survival of rat sciatic nerve segments preserved in storage solutions ex vivo assessed by novel electrophysiological and morphological criteria

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Neural Regeneration Research 2023年第9期18卷 2082-2088页

作者： Liwen Zhou Monzer Alatrach ted zhao Paul Oliphint George D.Bittner Department of Neuroscience University of Texas at AustinAustinTXUSA

Most organ or tissue allografts with viable cells are sto red in solutions ex vivo for hours to seve ral *** allografts then require rapid host revascula rization upon transplantation to maintain donor-cell functions(e.g.,cardiac muscle contra ctions,hepatic secretions).In contrast,peripheral nerve allografts stored ex vivo do not require revascularization to act as scaffolds to guide outgrowth by host axons at 1-2 mm/d,likely aided by viable donor Schwann *** current storage solutions and protocols,axons in all these donor orga n/tissue/nerve transplants are expected to rapidly become non-viable due to Wallerian degeneration within ***,ex vivo storage solutions have not been assessed for preserving normal axonal functions,i.e.,conducting action potentials or maintaining myelin *** hypothesized that most or all organ storage solutions would maintain axonal *** examined several common organ/tissue storage solutions(University of Wisconsin Cold Storage Solution,Normosol-R,Normal Saline,and La ctated Ringe rs) for axonal viability in rat sciatic nerves ex vivo as assessed by maintaining:(1) conduction of artificially-induced compound action potentials;and(2) axonal and myelin morphology in a novel assay *** ten diffe rent storage solution conditions for peripheral nerves with viable axons(PNVAs) diffe red in their solution composition,osmolarity(250-318 mOsm),temperature(4℃ vs.25℃),and presence of *** action potentials and axonal morphology in PNVAs were best maintained for up to 9 days ex vivo in calcium-free hypotonic diluted(250 mOsm) Normosol-R(dNR) at 4℃.Surprisingly,compound action potentials were maintained for only 1-2 days in UW and NS at 4℃,a much shorter duration than PNVAs maintained in 4℃ dNR(9 days) or even in 25℃ dNR(5 days).Viable axons in peripheral nerve allografts are critical for successful polyethylene glycol(PEG)-fusion of viable proximal and distal ends of host axons with viable donor a

关键词： axonal morphometrics axonal viability calcium osmolarity peripheral nerve grafts peripheral nerve injury temperature tissue storage solutions tonicity Wallerian degeneration

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Honor classes in China's higher education:perspectives from four universities

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National Science Review 2022年第3期9卷 169-174页

作者： Weijie zhao NSR

Ever since the University of Science and Technology of China started the Special Class for the Gi?ted Young in 1978, many Chinese universities have set up their own honor classes under different names such as Gi?ted Young Class, Basic Science Class, Experimental Class or Elite *** are o?ten small classes; some emphasize mathematics and physics, aiming to cultivate talents with broad basic knowledge, while others focus on a particular discipline, such as computer science. In 2011, the Chinese Ministry of Education started the Experimental Program for the Cultivation of Top Talents in Basic Sciences, which boosted a new round of honor classes.

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Pyramid size control and morphology treatment for high-efficiency silicon heterojunction solar cells

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Journal of Semiconductors 2019年第3期40卷 39-44页

作者： Xiaorang Tian Peide Han Guanchao zhao Rong Yang Liwei Li Yuan Meng ted Guo State Key Lab on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences School of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences ENN Solar Energy Co. Ltd.

This paper investigates the formation process of surface pyramid and etching characteristics during the texturing process of mono-crystalline silicon wafers. It is found that there is an etch rate transition point in alkaline anisotropic etching when{100} plane-dominated etch turns to {111} plane-dominated etch, and the pyramid size has a strong linear correlation with the etch amount at the transition point. Several techniques were developed to control the pyramid size by monitoring and adjusting the etching amount. A wide range of average pyramid sizes were successfully achieved, from 0.5 to 12 μm. The experiments of the pyramid size on the light reflectance, the minority carrier lifetime(MCLT), and the performance of silicon heterojunction(SHJ)solar cells were carried out and analyzed. A desirable range of pyramid sizes was empirically determined by our investigation. In order to reduce the density states on the texturing surface, the wet-chemical smoothing treatment was also investigated. The smoothing treatment improves the passivation quality and the performance of the solar cells. Through pyramid size control and morphology treatment, together with the amorphous silicon(a-Si:H) deposition improvement, and electrode optimization, high performance of SHJ solar cells has been achieved, up to conversion efficiency 23.6%.

关键词： pyramid size silicon heterojunction passivation

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Identification of anomalous fast bulk events in a p-type point-contact germanium detector

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Nuclear Science and Techniques 2022年第5期33卷 53-67页

作者： Ren-Ming-Jie Li Shu-Kui Liu Shin-ted Lin Li-Tao Yang Qian Yue Chang-Hao Fang Hai-Tao Jia Xi Jiang Qian-Yun Li Yu Liu Yu-Lu Yan Kang-Kang zhao Lei Zhang Chang-Jian Tang Hao-Yang Xing Jing-Jun Zhu College of Physics Sichuan UniversityChengdu 610065China Key Laboratory of Particle and Radiation Imaging(Ministry of Education)and Department of Engineering Physics Tsinghua UniversityBeijing 100084China

The ultralow detection threshold,ultralow intrinsic background,and excellent energy resolution of ptype point-contact germanium detectors are important for rare-event searches,in particular for the detection of direct dark matter interactions,coherent elastic neutrino-nucleus scattering,and neutrinoless double beta *** bulk events with an extremely fast rise time are observed in the CDEX-1B *** report a method of extracting fast bulk events from bulk events using a pulse shape simulation and reconstructed source experiment *** data and the distribution of X-rays generated by intrinsic radioactivity verified that the fast bulk experienced a single hit near the passivation *** performance of this germanium detector indicates that it is capable of single-hit bulk spatial resolution and thus provides a background removal technique.

关键词： p-type point-contact germanium detector Dark matter Pulse shape analysis Anomalous fast bulk events

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Derivative Estima tes of It era ted Spherical Average and Ext ension

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Acta Mathematica Sinica,English Series 2021年第7期37卷 1109-1130页

作者： Meng WANG Jun Yan zhao Department of Mathematics Zhejiang UniversityHangzhou 310027P.R.China Department of Mathematics Zhejiang Normal UniversityJinhua 321004P.R.China

In the paper,we study derivative estimates of the iterated spherical averages(At)^(N)(f).We obtain the optimal range of exponents(α,N,p)to ensure the L^(p)boundedness of P(■/■x)(A1)^(N)(f)for 1≤p≤∞,where P is a homogeneous polynomial of degree *** main theorem extends some known *** an application,we obtain the smallest N such that(A1)^(N):L^(p)(R^(n))→L_(α)^(p)(R^(n)).

关键词： H^(p)space spherical mean Bessel function H^(p)multiplier wave operator

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Spectrum of Normal Weighted Composition Operators on the Fock Space Over C^N

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Acta Mathematica Sinica,English Series 2019年第9期35卷 1563-1572页

作者： Li Xia FENG Lian Kuo zhao School of Mathematics and Computer Science Shanxi Normal University

By using commutative C*-algebra techniques, spectrum and essential spectrum of normal weighted composition operators on the Fock space over CN are completely characterized. As an application, spectrum of self-adjoint ... 详细信息

关键词： Fock space weigh ted composition operator normal spectrum

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Focal nodular hyperplasia of the liver: pathological analysis of 11 cases

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Hepatobiliary & Pancreatic Diseases International 2004年第2期3卷 199-203页

作者： Yi Pan, zhao-Ming Wang, Ling-Jun Mou, Xiao-Dong Teng, Zhou-Jun Zheng and Li-Xiong Ying Hangzhou, ChinaDepartments of Pathology and General Surgery First Affilia- ted Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China Department of Pathology First Affiliated Hospital Zhejiang University School of Medicine Hangzhou 310003 China. tjphy@***

BACKGROUND: Focal nodular hyperplasia (FNH) is a benign tumor-like lesion of the liver, predominantly affect- ing women. Its etiology is obscure and its pathogenesis is poorly understood. FNH should be differentiated from oth- er benign and malignant hepatic lesions. The aim of this study was to explore the pathological characteristics of FNH of the liver. METHODS: Eleven patients with FNH were studied retro- spectively by using hematoxylin and eosin, immunohisto- chemical and histochemical staining. RESULTS: In 8 female and 3 male FNH patients aged 19 to 54 years (mean 32), most of lesions showed central scars macroscopically. Microscopically 8 patients were found of classical type, 2 were of telangiectic type, and 1 was of mixed type. CONCLUSION: FNH is an uncommon benign hyperplastic lesion of the liver. It should be differentiated from hepato- cellular adenoma, alpha-fetoprotein negative hepatocellular carcinoma, and fibrolamellar carcinoma.

关键词： hepatic focal nodular hyperplasia pathology pathological diagnosis

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Emergent and urgent otologic surgeries during the SARS-CoV-2 pandemic: a protocol and review of literature

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2020年第S01期6卷 S11-S15页

作者： Elise E.zhao Joshua A.Lee Theodore R.McRackan Shaun A.Nguyen ted A.Meyer Department of Otolaryngology-Head and Neck Surgery Medical University of South CarolinaCharlestonSCUSA

Objective:To review guidelines for otologic procedures during the SARS-CoV-2 pandemic and to present a protocol for emergent or urgent mastoidectomy at our *** sources:Guidelines regarding emergent and urgent otologic procedures from otolaryngo-logic societies are *** described a protocol for emergent or urgent mastoidectomy at our ***:Patients requiring urgent or emergent mastoidectomy during the COVID-19 pandemic require prompt *** make the following recommendations:Emergent or urgent otologic procedures should be performed in a contained environment,such as a tent created by the microscope *** surgical team should practice using instruments in the tent setup to prepare for real *** procedures should adhere to guidelines set for high-risk procedures.

关键词： Mastoidectomy Head and neck cancer Ventilation tube Otitis media SARS-CoV-2

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Mg_(3)(Bi,Sb)_(2)-based thermoelectric modules towards near-room temperature cooling and power generation

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Journal of Materiomics 2022年第6期8卷 1218-1221页

作者： Gang Wang Jiawei Yang Huaizhou zhao Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing100049China

*** Heat-flow-driven Seebeck effect and electric-potential-driven Peltier effect collectively decide whether the thermoelectric device(ted)could function availably or ***,the primary parameters that evaluate the performance of ted are COP(coeffi-cient of performance)(c)and power conversion efficiency(h),which strongly depend on the figure of merit ZT of *** three coupled parameters could be inferred from.

关键词： materials. collective effect

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High molecular karyotype variation revealed in indigenous Elymus nutans in the Qinghai Plateau

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Plant Diversity 2017年第3期39卷 117-122页

作者： Quanwen Dou Feng Yu Yuan Li Yanyan zhao Ruijuan Liu Laboratory of Adaptation and Evolution of Plateau Biota Northwest Plateau Institute of BiologyChinese Academy of Sciences Xining 810001 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

The karyotypes of 27 individuals of Elymus nutans from eight wild populations in the Qinghai Plateau were analyzed using sequential FISH and GISH. High FISH pattern polymorphism and karyotype variation were detected within and among populations. The chromosome variations were mainly characterized as repeat deletions and amplifications along with inter-genomic translocations. The chromosomes of the St and Y genomes demonstrated higher polymorphism than those of the H genome. Six different intergenomic translocations were identified in 33.3% of individuals; type Ⅰ and Ⅱ translocations were detected with higher frequency. Further analysis revealed that type Ⅰ and Ⅱ translocations were distributed in different geographic regions. The origin of high karyotype variation of E. nutans in the Qinghai plateau is further discussed.

关键词： Elymus nutans Karyotype variation Inter-genomic translocation

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