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HRCT征象评估纯磨玻璃结节浸润性:肺结节圆度优于长-短径比值和分叶深度

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放射学实践 2020年第12期35卷 1542-1546页

作者：巴文娟许迪尹柯沈晶汤敏刘金沙谢梅伍建林大连大学附属中山医院放射科辽宁116001

目的:探讨HRCT上肺结节圆度在预测纯磨玻璃结节(pGGN)浸润性中的应用价值及其与肺结节长-短径比值和分叶深度的相关性。方法:回顾性分析经病理证实的111例共计116个pGGNs的HRCT表现。将所有病灶分为浸润前病变组(n=63)和浸润性病变组(n=... 详细信息

目的:探讨HRCT上肺结节圆度在预测纯磨玻璃结节(pGGN)浸润性中的应用价值及其与肺结节长-短径比值和分叶深度的相关性。方法:回顾性分析经病理证实的111例共计116个pGGNs的HRCT表现。将所有病灶分为浸润前病变组(n=63)和浸润性病变组(n=53),前者包括非典型腺瘤样增生(AAH)和原位腺癌(AIS),后者包括微浸润性腺癌(Mia)和浸润性腺癌(ia)。使用Photoshop CS6软件测量pGGN的圆度,比较两组间圆度值的差异,利用ROC曲线评估圆度、长-短径比和分叶深度在鉴别2组病变中的最佳截断值和诊断效能,并分析3个指标间的相关性。结果:浸润前病变组和浸润性病变组pGGN的圆度值分别为79.9%±4.2%和68.5%±7.7%,两组间差异有统计学意义(P<0.05)。ROC曲线分析显示pGGN的圆度值、长-短径比和分叶深度的截断值分别为73.4%、1.204和0.081,AUC分别为0.902、0.635和0.753。圆度值与长-短径比值、分叶深度均呈负相关(r=-0.498,P<0.01;r=-0.672,P<0.01)。结论:相对于长-短径比和分叶深度,圆度对pGGN浸润性的预测具有更高的准确性。

关键词：纯磨玻璃结节肺腺癌浸润性高分辨力CT 肺结节圆度

外源激素对丹参愈伤组织诱导和有效成分含量的影响

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西北林学院学报 2006年第5期21卷 151-153,175页

作者：柳福智董娟娥梁宗锁西北农林科技大学林学院陕西杨陵712100

以丹参(S a lv ia m iltiorrh iza)无菌苗的叶为外植体,接种于附加2,4-D、NAA、6-ba及其组合的M S固体培养基上,研究了外源激素对愈伤组织的诱导及有效成分含量的影响。结果表明:单独使用3种外源激素在一定浓度范围内均能诱导外植体产... 详细信息

以丹参(S a lv ia m iltiorrh iza)无菌苗的叶为外植体,接种于附加2,4-D、NAA、6-ba及其组合的M S固体培养基上,研究了外源激素对愈伤组织的诱导及有效成分含量的影响。结果表明:单独使用3种外源激素在一定浓度范围内均能诱导外植体产生愈伤组织;2,4-D对丹参愈伤组织的生长有促进作用,但当2,4-D的浓度在4 m g/L以上时,对愈伤组织的生长有抑制作用;配合使用外源生长素和细胞分裂素,能获得出愈率高、生长快、质量好的愈伤组织;外源激素的适宜组合为2,4-D 2.0 m g/L+6-ba 1.0 m g/L;愈伤组织中丹酚酸B的含量随培养时间的延长呈下降趋势。

关键词：丹参愈伤组织外源激素丹酚酸B

CRUSTAL CONFIGURATION OF NW HIMALAYA: eVIDeNCeS FROM THe ISOSTATIC AND FLeXURAL ANALYSIS OF GRAVITY DATA

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地学前缘 2000年第S1期7卷 74-74页

作者： Satyaprakash and Paramesh banerjee[WT5,5”BX](Wadia Institute of Himalayan Geology 33, Gen. Mahadeo Singh Road Dehra Dun\|248001,India e\|mail:satprakash@***)

With an objective of better understanding the nature of India\|eurasia collision process, as manifest in the NW part of the Himalaya, gravity and GPS aided geodetic studies were carried out during the summers of 1994 through 1996. The area covered includes the Ladakh Himalaya, Indus suture zone (ISZ) and entire NW Himalaya between 74°～80° longitude and 30°～37° latitude. Gravity survey was carried out at 1～2km interval along Kiratpur—Leh—Panamik transect. Four different profiles viz., Kargil—Panikhar; Karu—Tangtse; Mahe—Sumdo and Nyoma—Kyon Tso were also taken. GPS was used, in fast\|static mode for 3\|d position determination of the gravity stations. The collected data were reduced to mean sea level using a new technique of terrain correction (banerjee, 1998). The collected data was further combined with the published gravity data of SOI (Gulatee, 1956, Chug, 1978); ONGC (Raiverman et al., 1994) and Jin et al., 1994 to produce a new ba map for the NW Himalaya at 10mGal interval. Isostatic anomaly map of the region was also prepared using the ba map and eTOPO\|5 global elevation data set. On the ia map, an isostatic high of about 80mGal is evident over the entire course of the higher Himalaya. This elongated pattern of the gravity high aligns itself over the exposed rocks of central crystallines where the average elevation is 4500m. This 80mGal isostatic high may have been caused due to the fact that isostasy does not strictly prevail in the higher Himalaya and these are in a state of under\|compensation. This ia high has been interpreted in terms of upwarping in the Moho beneath the higher Himalaya. The ia analysis has also led to the depth of Moho to be 36～37km under the foothills, 60～65km under the higher Himalaya and 70～75km under the ISZ and beyond. Doubling of the crustal thickness is evident from the ia analysis and they are in general, in agreement with the DSS results of the Kashmir Himalaya.

关键词： gravity suture zone flexure Himalaya coherence isostasy Moho Satyaprakash

Search for two-neutrino double-beta decay of^(136)Xe to the 0^(+)_(1)excited state of 136ba with the complete eXO-200 dataset

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Chinese Physics C 2023年第10期47卷 1-9页

作者： S.Al Kharusi G.Anton I.badhrees P.S.barbeau D.Beck V.Belov T.Bhatta M.Breidenbach T.Brunner G.F.Cao W.R.Cen C.Chambers B.Cleveland M.Coon A.Craycraft T.Daniels L.Darroch S.J.Daugherty J.Davis S.Delaquis A.Der Mesrobian-Kabakian R.DeVoe J.Dilling A.Dolgolenko M.J.Dolinski J.echevers W.Fairbank Jr. D.Fairbank J.Farine S.Feyzbakhsh P.Fierlinger Y.S.Fu D.Fudenberg P.Gautam R.Gornea G.Gratta C.Hall e.V.Hansen J.Hoessl P.Hufschmidt M.Hughes A.Iverson A.Jamil C.Jessiman M.J.Jewell A.Johnson A.Karelin L.J.Kaufman T.Koffas R.Krücken A.Kuchenkov K.S.Kumar Y.Lan A.Larson B.G.Lenardo D.S.Leonard G.S.Li S.Li Z.Li C.Licciardi Y.H.Lin R.MacLellan T.Mcelroy T.Michel B.Mong D.C.Moore K.Murray O.Njoya O.Nusair A.Odian I.Ostrovskiy A.Perna A.Piepke A.Pocar F.Retière A.L.Robinson P.C.Rowson J.Runge S.Schmidt D.Sinclair K.Skarpaas A.K.Soma V.Stekhanov M.Tarka S.Thibado J.Todd T.Tolba T.I.Totev R.Tsang B.Veenstra V.Veeraraghavan P.Vogel J.-L.Vuilleumier M.Wagenpfeil J.Watkins M.Weber L.J.Wen U.Wichoski G.Wrede S.X.Wu Q.Xia D.R.Yahne L.Yang Y.-R.Yen O.Ya.Zeldovich T.Ziegler 无 Physics Department McGill UniversityMontrealQuebec H3A 2T8Canada erlangen Centre for Astroparticle Physics(eCAP) Friedrich-Alexander-University Erlangen-NürnbergErlangen 91058Germany Physics Department Carleton UniversityOttawaOntario K1S 5B6Canada Department of Physics Duke Universityand Triangle Universities Nuclear Laboratory(TUNL)DurhamNorth Carolina 27708USA Physics Department University of IllinoisUrbana-ChampaignIllinois 61801USA Institute for Theoretical and experimental Physics named by A.I.Alikhanov of National Research Centre“Kurchatov Institute” Moscow 117218Russia Department of Physics University of South DakotaVermillionSouth Dakota 57069USA SLAC National Accelerator Laboratory Menlo ParkCalifornia 94025USA TRIUMF VancouverBritish Columbia V6T 2A3Canada Institute of High energy Physics Beijing 100049China Department of Physics Laurentian UniversitySudburyOntario P3E 2C6Canada Physics Department Colorado State UniversityFort CollinsColorado 80523USA Department of Physics and Physical Oceanography University of North Carolina at WilmingtonWilmingtonNC 28403USA Physics Department and CeeM Indiana UniversityBloomingtonIndiana 47405USA Physics Department Stanford UniversityStanfordCalifornia 94305USA Department of Physics Drexel UniversityPhiladelphiaPennsylvania 19104USA Amherst Center for Fundamental Interactions and Physics Department University of MassachusettsAmherstMA 01003USA Technische Universität München Physikdepartment and Excellence Cluster UniverseGarching 80805Germany Physics Department University of MarylandCollege ParkMaryland 20742USA Department of Physics and Astronomy University of AlabamaTuscaloosaAlabama 35487USA Wright Laboratory Department of PhysicsYale UniversityNew HavenConnecticut 06511USA IBS Center for Underground Physics Daejeon 34126Korea Department of Physics and Astronomy Stony Brook UniversitySUNYStony BrookNew York 11794USA Kellogg Lab CaltechPasadenaCalifornia 91125USA LHeP Albert Einstein CenterUniversi

A new search for two-neutrino double-beta(2νββ)decay of^(136)Xe to the 0+1 excited state of 136ba is performed with the full eXO-200 dataset.A deep learning-based convolutional neural network is used to discriminate signal from background *** detection efficiency is increased relative to previous searches by eXO-200 by more than a factor of *** the addition of the Phase II dataset taken with an upgraded detector,the median 90%confidence level half-life sensitivity of 2νββdecay to the 0+1 state of 136ba is 2.9×10^(24)yr using a total^(136)Xe exposure of 234.1 kg *** statistically significant evidence for 2νββdecay to the 0^(+)_(1)state is observed,leading to a lower limit of T2ν1/2(0^(+)→0^(+)_(1))>1.4×10^(24)yr at 90%confidence level,improved by 70%relative to the current world's best constraint.

关键词： eXO-200 experiment neutrinoless double beta decay excited state