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Extracorporeal shock-wave versus pneumatic ureteroscopic lithotripsy in treatment of lower ureteral calculi

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Asian Journal of Andrology 2002年第4期4卷 303-305页

作者： Zeng, GQ Zhong, WD Cai, YB Dai, QS Hu, JB Wei, ha 1st Municipal Peoples Hosp Dept Urol Guangzhou 510180 Peoples R China

Aim: To compare the efficacy and complications of extracorporeal shock-wave lithotripsy (SWL) and pneumatic ureteroscopic lithotripsy (URS) in the treatment of lower ureteral calculi. Methods: From August 1997 to June 1999, 210 patients with calculi in the distal third of the ureter were treated with SWL and the other 180 with URS. The stones were fragmented with either HB-ESWL-V lithotripter or JML-93 pneumatic lithotripter through Wolf 7.5～9.0 Fr ureteroscope. The outcome was assessed in terms of stone clearance rate, re-treatment rate and complication incidence. Results: The stone clearance rate was 78.1% with SWL and 93.3 % with URS (Phad a re-treatment rate of 11.9 %, vs 2.2 % in the URS group (P<.05). URS caused ureteral perforation in 3.3% of patients, while it was 0 with SWL (P<0.05). The differences in the incidence of other complications such as infection and stricture between the two groups were insignificant. Conclusion: Though the selection of these two options depends on equipments available and the expertise of the operator, we recommend URS as the optimal treatment for distal ureteral calculi. (Asian J Andro12002 Dec, 4: 303-305)

关键词： ureteral calculi lithotripsy ureteroscopy

“One stone,two birds”solvent system to fabricate microcrystalline cellulose–Ti_(3)C_(2)T_(x)nanocomposite film as a flexible dielectric and thermally conductive material

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Nano Research 2023年第2期16卷 3240-3253页

作者： Yong-Zhu Yan Shuwei Li Sung Soo Park Wei-Jin Zhang Jun Seok Lee Jung Rae Kim Dong Gi Seong Chang-Sik ha Department of Polymer Science and Engineering School of Chemical EngineeringPusan National UniversityBusan 46241Republic of Korea School of Chemical and Biomolecular Engineering Pusan National UniversityBusan 46241Republic of Korea Division of Advanced Materials Engineering Dong-Eui UniversityBusan 47340Republic of Korea

A strategy for fabricating microcrystalline cellulose–Ti_(3)C_(2)T_(x)(MCC–MXene)nanocomposite films with high relative permittivity,high thermal conductivity,and excellent mechanical properties was *** MCC–MXene nanocomposite film was fabricated by casting a solution containing N,N-dimethylacetamide/lithium chloride(DMAc/LiCl)-soluble MCC and DMAcdispersible MXene nanosheets,followed by humidity control *** MXene nanosheets greatly enhanced the permittivity of the nanocomposite films owing to interfacial ***,the nanocomposite film with 20 wt.%MXene content achieved a desirable permittivity of 71.4 at 102 Hz(a 770%improvement against that of neat cellulose),while the dielectric loss only increased by 1.8 times(from 0.39 to 0.70).The obtained nanocomposite films with 20 wt.%and 30 wt.%MXene exhibited remarkable in-plane thermal conductivities of 8.523 and 9.668 W∙m^(−1)∙K^(−1),respectively,owing to the uniform dispersion and selfalignment of the MXene layered ***,the uniformly dispersed MXene nanosheets in the MCC network with interfacial interaction(hydrogen bonding)and mechanical entanglement endowed the nanocomposite films with excellent mechanical properties and ***,the thermal stability,water resistance,and antibacterial properties of the nanocomposite films were effectively improved with the introduction of ***,using DMAc/LiCl as the solvent system not only improves the compatibility between MCC and MXene but also avoids the problem of easy oxidation of MXene in aqueous *** the high stability of the MCC–MXene solution and enhanced properties of the MCC–MXene films,the proposed strategy manifests great potential for fabricating natural biomass-based dielectric materials.

关键词： Ti_(3)C_(2)T_(x) microcrystalline cellulose flexible dielectric thermally conductive N,N-dimethylacetamide/lithium chloride(DMAc/LiCl) compatibility

Urease activity and nitrogen dynamics in highly weathered soils with designer biochars under corn cultivation

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Biochar 2020年第3期2卷 343-356页

作者： Gilbert C.Sigua Jeff M.Novak Don W.Watts William T.Myers Thomas F.Ducey Kenneth C.stone United States Department of Agriculture Agricultural Research ServiceCoastal Plains SoilWaterand Plant Research Center2611 West Lucas StreetFlorenceSC 29501USA

The application of designer biochar has the potential to impact soil enzyme activity and soil nitrogen ***,very little is known about the mechanisms responsible for biochar-enzyme-nitrogen interaction in highly weathered *** objective of our 3-year(2016-2018)field experiment was to evaluate the effectiveness of designer biochars(DB)in enhancing urease activity(UA),total nitrogen(TN),total inorganic nitrogen(TIN),and nitrogen uptake(NU)at different growth stages(GS)of corn in a highly weathered soil of southeastern Coastal Plain region,*** treatments have consisted of the control,100%pine chips(100PC),100%poultry litter(100PL),2:1 blend of PC and PL(PCPL),100%raw switchgrass(Panicum vaginatum,L;100RSG),and 2:1 blend of PC and RSG(PCRSG).All the designer biochar treatments were applied at the rate of 30,000 kg ha^(−1)to a Goldsboro loamy sand in *** activity,TN,TIN,and NU varied remarkably with DB(p≤0.0001)at different GS(p≤0.0001)of *** treated with 100PL had the greatest UA(28.18μg N g^(−1)h^(−1)),TN(0.087%),and TIN(14.53 mg kg^(−1))while the least UA,TN,and TIN of 20.55μg N g^(−1)h^(−1),0.063%,and 5.42 mg kg^(−1),respectively,were observed from the *** three-year TN average increase over the control was in the order:100PL(36.8%)>100RSG(25.8%)>PCRSG(25.3%)>PCPL(23.9%)>100PC(7.1%).The greatest NU of corn of 140.4 kg N ha^(−1)was from soils treated with 100PL while the least amount of NU was from ***,our results showed promising significance for the treatment of highly weathered soils since the application of DB did enhance UA and improve TN and TIN in the soils.

关键词： Goldsboro sandy loam Coastal plain Corn Urease activity Highly weathered soil Nitrogen Designer biochars Total inorganic nitrogen

藏南邛多江地堑的晚新生代沉积地层及对南北向裂谷形成时代的初步限定

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地质学报 2018年第10期92卷 2051-2067页

作者：哈广浩吴中海何林自然资源部新构造运动与地质灾害重点实验室中国地质科学院地质力学研究所北京100081 中国地质科学院北京100037 中国地质大学(北京)地球科学学院北京100083

邛多江地堑构成了藏南近南北向裂谷带最东侧的错那-沃卡裂谷中段,是由地堑西缘高角度正断层主控的半地堑式断陷盆地。详细的地质、地貌调查表明,该地堑内主要充填有晚新生代以来的多套河湖相、冰碛及冰水沉积地层。河湖相地层底部以黏... 详细信息

邛多江地堑构成了藏南近南北向裂谷带最东侧的错那-沃卡裂谷中段,是由地堑西缘高角度正断层主控的半地堑式断陷盆地。详细的地质、地貌调查表明,该地堑内主要充填有晚新生代以来的多套河湖相、冰碛及冰水沉积地层。河湖相地层底部以黏土和粉砂为主,上部以砾石层为主,向上砾石砾径逐渐变大,顶部为早更新世冲积砾石层;冰碛主要发育于地堑中部山前地带,构成宽缓的冰碛台地或者终碛垄、侧碛堤。地层的测年结果表明,该区主要发育两套晚新生代河湖相地层,早期沉积时代早于5Ma,晚期为晚第四纪;而冰碛及冰水沉积的时代主要为中更新世。综合该区地质地貌、沉积和构造等分析结果表明,早期的河湖相沉积与盆地发生初始裂陷后的主边界正断层发生强烈垂直活动有关,而晚期的河湖相沉积主要形成于盆地后期萎缩过程中,成因可能与中更新世以来的冰川堰塞湖有关。由于邛多江地堑受控于西侧主边界正断层,早期沉积应晚于其初始裂陷时代。因此,进一步综合现有年龄数据资料认为,藏南近南北裂谷的初始裂陷时代应早于5～10Ma,但晚于约15Ma。

关键词：藏南近南北裂谷邛多江地堑河湖相沉积正断层作用初始裂陷时代

Immediate balloon deflation method in endoscopic papillary large balloon dilation for extraction of difficult bile duct stones

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Open Journal of Gastroenterology 2013年第2期3卷 142-147页

作者： Duk Joo Choi Yeon Suk Kim Jung Ho Kim Yang Suh Ku Min Su ha Ju Hyeon Kim Department of Internal Medicine Gachon University Gil Medical Center Incheon South Korea

Background/Aims: Recently, endoscopic papillary large balloon dilation (EPLBD) using a large balloon (12 - 20 mm) for extraction of difficult common bile duct (CBD) stones has been widely accepted with favorable outcomes. However, there is no consensus with regard to the ballooning time. The aim of our study was to evaluate the efficacy and safety of immediate balloon deflation in EPLBD for the treatment of difficult bile duct stone. Methods: This was a retrospective study of 80 consecutive patients with bile duct stones who were treated with an immediate balloon deflation method in EPLBD combined with endoscopic sphincterotomy (EST) between January 2010 and December 2012. Overall success rate, success rate at first ERCP, and the frequency of mechanical lithotripsy for complete stone removal were assessed for efficacy and safety was evaluated by assessing major complications. Results: Overall success rate for complete stone removal was high (78/80, 97.5%) and success rate for complete stone removal at first ERCP was 86.3% (69/80). The use of mechanical lithotripsy was 0% (0/80). The overall complication rate was favorable (5/80, 6.3%). PostERCP pancreatitis was observed in 3 patients (two: mild, one: moderate). In subgroup analysis, the presence of periampullary diverticulum was the only factor affecting the success rate at first ERCP. Conclusion: This study demonstrated the favorable outcome of immediate balloon deflation for treatment of difficult CBD stones and can be considered for clinical application.

关键词： Endoscopic Papillary Large Balloon Dilation Ballooning Time Immediate Balloon Deflation Difficult Bile Duct stone

黑人女性生存的基石——莫里森小说的姐妹情谊

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太原大学教育学院学报 2007年第3期25卷 53-55页

作者：哈旭娴江苏广播电视大学江苏南京210036

姐妹情谊是黑人女性主义批评的一个重要组成,黑人女性对自我价值观的共享是黑人女性"姐妹情谊"的一个部分。在男权处于支配地位的世界中,姐妹情谊是广大黑人女性谋生存、求发展的精神和物质双重保证。莫里森在其创作中继承了这一黑人女... 详细信息

姐妹情谊是黑人女性主义批评的一个重要组成,黑人女性对自我价值观的共享是黑人女性"姐妹情谊"的一个部分。在男权处于支配地位的世界中,姐妹情谊是广大黑人女性谋生存、求发展的精神和物质双重保证。莫里森在其创作中继承了这一黑人女性书写的传统,同时她对姐妹情谊的传统概念作了自己的阐释。

关键词：黑人女性姐妹情谊莫里森基石

板栗壳生药研究及有效成分没食子酸、绿原酸、芦丁含量测定

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食品工业科技 2016年第21期37卷 323-328页

作者：苏丽娜王小庆曲靖医学高等专科学校药学系云南曲靖655000

摘要：采用性状鉴别、组织切片鉴别、粉末鉴别对板栗壳进行生药研究。建立HPLC法同时测定板栗壳中没食子酸、绿原酸和芦丁含量，色谱条件为C18柱，甲醇-0．4％磷酸为流动相梯度洗脱，检测波长275nm，流速1mL／min，柱温30℃。结果表明... 详细信息

摘要：采用性状鉴别、组织切片鉴别、粉末鉴别对板栗壳进行生药研究。建立HPLC法同时测定板栗壳中没食子酸、绿原酸和芦丁含量，色谱条件为C18柱，甲醇-0．4％磷酸为流动相梯度洗脱，检测波长275nm，流速1mL／min，柱温30℃。结果表明，板栗壳横切面、纵切面果皮细胞特点、中果皮的石细胞群和石细胞环带、内果皮较多的非腺毛、种脊部位的三角形维管柬及粉末中果皮细胞、石细胞、非腺毛特征均可作为板栗壳的生药鉴别特征，为板栗壳生药学质量标准研究奠定基础。测定11批云南不同产地板栗壳样品中没食子酸含量为0．328-0．362mg／g，绿原酸含量为0．129~0．141mg／g，芦丁含量为0．180—0．230mg／g。该含量测定方法操作简单，结果准确，专属性强，为板栗壳质量标准的建立提供依据。

关键词：板栗壳没食子酸绿原酸芦丁高效液相色谱生药研究

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朝鲜支石墓的特殊结构

边疆考古研究 2022年第1期 345-356页

作者：河文植延世大学首尔03722

以朝鲜半岛为代表的东北亚地区保留了史前遗迹的很多特点,支石墓就是其中之一。与其他遗迹相比,支石墓因其外形的特殊性更受到人们的关注。目前正在进行的关于支石墓结构的复原研究,主要是通过模拟当时建造支石墓所需的劳动力,研究并复... 详细信息

以朝鲜半岛为代表的东北亚地区保留了史前遗迹的很多特点,支石墓就是其中之一。与其他遗迹相比,支石墓因其外形的特殊性更受到人们的关注。目前正在进行的关于支石墓结构的复原研究,主要是通过模拟当时建造支石墓所需的劳动力,研究并复原当时的社会结构、筑造背景等方面。仔细考察朝鲜已发掘的支石墓,就会发现其建造过程和方法有独特性,对周边地区支石墓的调查也发现了同样的情况,这说明其结构具有地域性分布的特点(图一)。

关键词：支石墓复原研究地域性分布朝鲜半岛东北亚地区过程和方法发掘遗迹

微创经皮肾镜取石术和经尿道逆行输尿管镜气压弹道碎石术治疗幼儿输尿管中上段结石的疗效对比

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中外医疗 2018年第25期37卷 13-15页

作者：韩桂强临清市人民医院泌尿外科山东临清252600

目的探讨微创经皮肾镜取石术(MPCNL)和经尿道输尿管镜取石术(URSL)治疗≤5岁输尿管中上段结石患儿的临床疗效和安全性。方法根据患儿住院号先后顺序从2012年3月—2015年3月在该院治疗的≤6岁输尿管中上段结石患儿中随机抽取80例作为研... 详细信息

目的探讨微创经皮肾镜取石术(MPCNL)和经尿道输尿管镜取石术(URSL)治疗≤5岁输尿管中上段结石患儿的临床疗效和安全性。方法根据患儿住院号先后顺序从2012年3月—2015年3月在该院治疗的≤6岁输尿管中上段结石患儿中随机抽取80例作为研究对象,借助计算机相关程序将其平均分组,其中接受MPCNL治疗的设为观察组(40例),接受URSL治疗的设为对照组(40例),比较不同手术方案在疗效及观察指标方面的差异。结果观察组的手术时间和住院时间分别为(45.43±9.76)min和(8.12±1.03)d,明显短于对照组的(68.32±11.28)min和(13.45±2.34)d,差异有统计学意义(t=2.902、2.374,P0.05);观察组术后并发症发生率20.0%(8/40)明显低于对照组60.0%(24/40),差异有统计学意义(χ~2=13.33,P<0.05)。结论 MPCNL治疗幼儿输尿管中上段结石手术时间短,一期结石取净率高,围手术期并发症发生率低,较URSL安全高效,值得临床推广应用。

关键词：输尿管结石中上段幼儿经皮肾镜输尿管镜