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Formation of High Concentration Cr4+ Ion in a PbWO4 Single Crystal

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Formation of High Concentration Cr4+ Ion in a PbWO4 Single C...

第十二届全国量子光学学术会议

作者： Tong b.tang Department of Physics Hong Kong baptist University Kowloon TongHong Kong

Cr4+ ion with tetrahedral symmetry, as found in single crystals of forsterite and YAG , have found application as saturable-absorbors, tunable solid state lasers etc. However, a high concentration of active Cr species is difficult to obtain because it is rather unstable in these materials. It is expected that the continuing search for other alternative hosts will lead to the emergence of new efficient Cr4+ -doped lasers.

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Precision determination of dipole transition elements with a single ion

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Photonics Research 2024年第10期12卷 2242-2248页

作者： H.SHAO Y.-b.tang H.-L.YUE F.-F.WU Z.-X.MA Y.HUANG L.-Y.tang H.GUAN K.-L.GAO State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China Physics Teaching and Experiment Center Shenzhen Technology UniversityShenzhen 518118China University of Chinese Academy of Sciences Beijing 100049China College of Sciences China Jiliang UniversityHangzhou 310018China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China Wuhan Institute of Quantum Technology Wuhan 430206China Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences University of Science and Technology of ChinaHefei 230026China

In the field of quantum metrology,transition matrix elements are crucial for accurately evaluating the black-body radiation shift of the clock transition and the amplitude of the related parity-violating transition,and can be used as probes to test quantum electrodynamic effects,especially at the 10^(−3)–10^(−4)*** developed a universal experimental approach to precisely determine the dipole transition matrix elements by using the shelving technique,for the species where two transition channels are involved,in which the excitation pulses with increasing duration were utilized to induce shelving,and the resulting shelving probabilities were determined by counting the scattered photons from the excited^(2)P_(1∕2)state to the^(2)S_(1∕2)ground *** the scattered photons offers several advantages,including insensitivity to fluctuations in magnetic field,laser intensity,and frequency *** intensity-alternating sequence to minimize detection noise and a real-time approach for background photon correction were implemented in *** applied this technique to a single Yb^(+)ion,and determined the 6p^(2)P_(1∕2)-5d^(2)D_(3∕2)transition matrix element 2.9979(20)ea0,which indicates an order of magnitude improvement over existing *** combining our result with the 6p^(2)P_(1∕2)lifetime of 8.12(2)ns,we extracted the 6s^(2)S_(1∕2)-6p^(2)P_(1∕2)transition matrix element to be 2.4703(31)*** accurately determined dipole transition matrix elements can serve as a benchmark for the development of high-precision atomic many-body theoretical methods.

关键词： transition dipole elements

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一种新定义——炸药的特性位

火炸药

火炸药 1986年第1期 50-55页

作者： V.Krishna Mohan Tong b.tang 郑孟菊

1.引言炸药的特性可用威力表示,可理解为单位时间的作功能力.另一个与此密切相关的术语是猛度,它是炸药装药对非常近邻物质的粉碎效应.民用炸药工业中通常用威力,军事领域内则较常使用猛度.至今还不能用基本的物理化学性质对这两个术语... 详细信息

1.引言炸药的特性可用威力表示,可理解为单位时间的作功能力.另一个与此密切相关的术语是猛度,它是炸药装药对非常近邻物质的粉碎效应.民用炸药工业中通常用威力,军事领域内则较常使用猛度.至今还不能用基本的物理化学性质对这两个术语给出清楚而定量的定义.本文的目的是在这方面作一尝试.一般是炸药的威力愈大,猛度就愈大,但含大量金属的炸药是例外.可能的原因是沿C-J等熵曲线独特的高压膨胀行为造成的,我们在这里不考虑这些炸药.对于CHNO型炸药威力在很大程度上取决于炸药爆轰时产生的气体体积和热量;而猛度主要受炸药装填密度和爆速的控制.

关键词：威力钢板金属板爆轰产物圆筒试验爆速猛度炸药密度

歧化反应生成正交相氧化锡的119Sn NMR研究

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歧化反应生成正交相氧化锡的119Sn NMR研究

2018第二十届全国波谱学学术年会

作者：连亚东黄枭坤于积 Tong b.tang 顾民南京大学固体微结构物理国家重点实验室物理系先进材料协同创新中心南京大学香港浸会大学物理系

氧化锡作为一种常见的金属氧化物半导体材料,被广泛应用于透明导电、气敏传感和催化领域。常温常压下,氧化锡为金红石结构(r-SnO),在高温高压下会发生结构相变,生成氧化铅结构的正交相氧化锡(s-SnO)。正交相氧化锡还可以通过氧化亚锡的...

氧化锡作为一种常见的金属氧化物半导体材料,被广泛应用于透明导电、气敏传感和催化领域。常温常压下,氧化锡为金红石结构(r-SnO),在高温高压下会发生结构相变,生成氧化铅结构的正交相氧化锡(s-SnO)。正交相氧化锡还可以通过氧化亚锡的纳米颗粒[薄膜]在空气中的氧化反应得到,同时会生成金红石结构的氧化锡。正交相氧化锡的特殊结构使其具有优异的气敏和催化特性。我们用球磨方法制备了纳米氧化亚锡,通过歧化反应生成了正

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Response surface methodology for optimizing the fermentation medium of alpha-galactosidase in solid-state fermentation

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Response surface methodology for optimizing the fermentation...

中国食品科学技术学会第五届年会暨第四届东西方食品业高层论坛

作者： C.Q.Liu Q.H.Chen b.tang H.Ruan G.Q.He (Department of Food Science and Nutrition,Zhejiang University,Hangzhou 310029,China)

Aims:Alpha-galactosidase is applied in food and feed industries for hydrolysing raffinose series oligosaccharides(RO)that are the factors primarily responsible for flatulence upon ingestion of soybean-derived *** objective of the current work was to develop an optimal culture medium for the production of alpha-galactosidase in solid-state fermentation(SSF) by a mutant strain Aspergillus foetidus.,Methods and Results:Response surface methodology (RSM)was applied to evaluate the effects of variables,namely the concentrations of wheat bran, soybean meal,KHPO,MnSO·HO and CuSO·5HO on alpha-galactosidase production in the solid substrate.A fractional factorial design(FFD)was firstly used to isolate the main factors that affected the production of alpha-galactosidase and the central composite experimental design (CCD)was then adopted to derive a statistical model for optimizing the composition of the fermentation *** experimental results showed that the optimum fermentation medium for alpha-galactosidase production by Aspergillus foetidus ZU-Gl was composed of 8.2137 g wheat bran,1.7843 g soybean meal,0.001 g MnSO·HO and 0.001 g CuSO·5HO in 10g dry matter fermentation medium.,Conclusions:After incubating 96 h in the optimum fermentation medium,alpha-galactosidase activity was predicted to be 2210·76 U gdry matter in 250 ml shake *** the present study,alpha-galactosidase activity reached 2207·19 U gdry matter. Significance and Impact of the Study:Optimization of the solid substrate was a very important measure to increase enzyme activity and realize industrial production of *** process of alpha-galactosidase production in laboratory scale may have the potential to scale-up.

关键词： alpha-galactosidase Aspergillus foetidus medium optimization response surface methodology solid-state fermentation.

Response surface methodology for optimizing the fermentation medium of alpha-galactosidase in solid-state fermentation

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Response surface methodology for optimizing the fermentation...

饲用酶制剂开发与应用技术交流研讨会

作者： C.Q.Liu,Q.H.Chen,b.tang,H.Ruan and G.Q.He Department of Food Science and Nutrition,Zhejiang University,Hangzhou 310029,China

Aims:Alpha-galactosidase is applied in food and feed industries for hydrolysing raffinose series oligosaccharides(RO) that are the factors primarily responsible for flatulence upon ingestion of soybean-derived *** objective of the current work was to develop an optimal culture medium for the production of alpha-galactosidase in solid-state fermentation(SSF) by a mutant strain Aspergillus foetidus. Methods and Results:Response surface methodology(RSM) was applied to evaluate the effects of variables,namely the concentrations of wheat bran,soybean meal,KHPO,MnSO·HO and CuSO·5HO on alpha-galactosidase production in the solid substrate.A fractional factorial design(FFD) was firstly used to isolate the main factors that affected the production of alpha-galactosidase and the central composite experimental design(CCD) was then adopted to derive a statistical model for optimizing the composition of the fermentation *** experimental results showed that the optimum fermentation medium for alpha-galactosidase production by Aspergillus foetidus ZU-G1 was composed of 8-2137 g wheat bran,1·7843 g soybean meal,0·001 g MnSO·HO and 0·001 g CuSO·5HO in 10 g dry matter fermentation medium. Conclusions:After incubating 96 h in the optimum fermentation medium, alpha-galactosidase activity was predicted to be 2210·76 U g dry matter in 250 ml shake *** the present study,alpha-galactosidase activity reached 2207·19 U g dry matter. Significance and Impact of the Study:Optimization of the solid substrate was a very important measure to increase enzyme activity and realize industrial production of *** process of alpha-galactosidase production in laboratory scale may have the potential to scale-up.

关键词： alpha-galactosidase Aspergillus foetidus medium optimization response surface methodology solid-state fermentation

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钨酸铅晶体中的偶极缺陷

物理学报 2003年第8期52卷 2066-2074页

作者：冯锡淇邓棠波中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室上海200050 香港浸会大学物理系

在用阻抗谱研究PbWO4 (PWO)晶体的介电特性时发现 ,掺La3+ 的PWO晶体中存在典型的介电弛豫现象 ,它被归因于La3+ 进入Pb位并与铅空位VPb缔合成偶极缺陷 .这一结果不仅清楚地证明了PWO晶体中铅空位的存在 ,而且表明阻抗谱测试可以成为PW... 详细信息

在用阻抗谱研究PbWO4 (PWO)晶体的介电特性时发现 ,掺La3+ 的PWO晶体中存在典型的介电弛豫现象 ,它被归因于La3+ 进入Pb位并与铅空位VPb缔合成偶极缺陷 .这一结果不仅清楚地证明了PWO晶体中铅空位的存在 ,而且表明阻抗谱测试可以成为PWO晶体微结构研究的有力工具 .以阻抗谱测试为主要工具 ,结合光吸收谱 (包括红外谱 )和x射线光电子能谱 ,阐明了在异价掺杂离子 (3+,4 +,5 +以及 3+和 5 +双掺 )掺杂的PWO晶体中偶极缺陷的形成、类型和转化规律及其与晶体性能的关系 ,以及退火对偶极缺陷演变过程的影响 .所得的结果还与PWO晶体缺陷的计算机模拟结果进行了比较 .

关键词：钨酸铅晶体偶极缺陷介电弛豫异价掺杂退火效应闪烁晶体高能物理阻抗谱测试光吸收谱

Ultra-high Ultra-short OPCPA Laser Development

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Ultra-high Ultra-short OPCPA Laser Development

CCAST“2002年全国强场激光物理”研讨会

作者： X.D.Yang.Z.Z.Xu,R.X.LI,Z.Q.Zhang,H.H.Lu, Y.X.Leng L.H.Lin, W.Q.Zhang, Y.Fan, b.tang, b.Z.Zhao Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences

＜正＞MotivationsDeveloping 16.7TW OPCPA laser systemThe Latest Research Result on OPCPAA practical design of a 100TW OPCPA scheme Conclusion

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Lenalidomide regulates the CCL21/CCR7/ERK1/2 axis to inhibit migration and proliferation in diffuse large b-cell lymphoma

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Oncology Research 2025年第1期33卷 199-212页

作者： WEN YANG bIN tang DAN XU WENXIU YANG Department of Pathology Guizhou Medical UniversityThe Affiliated Hospital of Guizhou Medical UniversityGuiyang550004China

background:The prognostic significance of the chemokine receptor CCR7 in diffuse large b-cell lymphoma(DLbCL)has been reported ***,the detailed mechanisms of CCR7 in DLbCL,particularly regarding its interaction with lenalidomide treatment,are not fully ***:Our study utilized bioinformatics approaches to identify hub genes in SU-DHL-2 cell lines treated with lenalidomide compared to control *** data and clinical information from 122 patients with DLbCL were analyzed to assess the correlation of CCR7 and p-ERK1/2 expression with the prognosis of ***,in vitro and in vivo experiments were conducted to clarify the role of CCR7 in the response of DLbCL to lenalidomide ***:Our bioinformatics analysis pinpointed CCR7 as a hub gene in the context of lenalidomide treatment in ***,31.14%and 36.0%(44/122)of DLbCL cases showed positive expression for CCR7 and ERK1/2 respectively,establishing them as independent prognostic factors for adverse outcomes in DLbCL via multivariate Cox regression ***,our studies demonstrated that the external application of the protein CCL21 promoted proliferation,migration,invasion,and activation of the ERK1/2 pathway in SU-DHL-2 and OCI-LY3 cell lines with high levels of CCR7 *** effect was mitigated by CCR7 silencing through siRNA,application of ERK inhibitors,or lenalidomide *** vivo experiments reinforced the efficacy of lenalidomide,significantly reducing tumor growth rate,tumor mass,serum total LDH levels,and expression of CCR7 and p-ERK1/2 in a SUDHL-2 xenograft model in nude mice(pbCL treatment.

关键词： CCR7 CCL21 ERK1/2 Lenalidomide Diffuse large b-cell lymphoma(DLbCL)