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碱性过硫酸钾-紫外分光光度法测定水质总氮方法的改进

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岩矿测试 2024年第1期43卷 114-123页

作者：刘振超李志雄陆迁树王晓娜张松胡耀华中国地质调查局昆明自然资源综合调查中心云南昆明650111

水质总氮是指示水体富营养化的重要标志物,因此,开发测定水体中总氮的准确方法,对研究水体中的污染物来源、污染程度及总氮的地球化学循环过程具有重要意义。测定水质样品中的总氮,通常采用碱性过硫酸钾-紫外分光光度法,但该法对空白吸... 详细信息

水质总氮是指示水体富营养化的重要标志物,因此,开发测定水体中总氮的准确方法,对研究水体中的污染物来源、污染程度及总氮的地球化学循环过程具有重要意义。测定水质样品中的总氮,通常采用碱性过硫酸钾-紫外分光光度法,但该法对空白吸光度有严苛的要求,空白吸光度一旦超过0.030,就有可能导致测定结果严重偏低,其中,过硫酸钾的纯度和存放时间可能对测定结果影响最大;同时,采用比色管捆绑方式高温高压消解水质样品,导热较慢,消解时间偏长,捆绑时一旦比色管上的标签或记号脱落,容易导致样品混乱;样品保存条件不当也很容易造成测定结果偏低。为提高水质样品中总氮测定结果的准确性和效率,本文通过对国内外不同厂家生产的过硫酸钾进行总氮空白吸光度和存放时间对比实验,然后对两种消解方法进行消解时间对比实验,最后,对比了两种不同水质样品保存方法对测定结果的影响。对比实验结果表明:国产优级纯碱性过硫酸钾存放时间在30天内,其水质总氮空白吸光度均小于0.030;在124℃条件下,使用插置法消解样品,只用20min就能使样品消解完全;对酸化后的水质样品,其保质期从1天延长至7天。研究认为,选用国产优级纯过硫酸钾和改良过的插置法消解水质样品,与捆绑法相比,其水质总氮检出限更低,消解效率更高,且不容易出现互相污染和样品错位等情况,提高了水质总氮测定的准确度。

关键词：过硫酸钾紫外分光光度法水质总氮方法改进

Crustal Structure Revealed by a Deep Seismic Sounding Profile of Baijing-Gaoming-Jinwan in the Pearl River Delta

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Journal of Ocean University of China 2018年第1期17卷 186-194页

作者： ZHANG Xiang YE Xiuwei LV Jinshui SUN Jinlong wang xiaona CAS Key Laboratory of Ocean Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of Sciences Beijing 100049China Guangdong Earthquake Agency China Earthquake AdministrationGuangzhou 510070China

The Pearl River Estuary area, located in the middle part of the southern China coastal seismic belt, has long been considered a potential source of strong earthquakes above magnitude 7.0. To scientifically assess the potential strong earthquake risk in this area, a three-dimensional artificial seismic sounding experiment, consisting of a receiving array and seabed seismograph, was performed to reveal the deep crustal structure in this region. We used artificial ship-borne air-gun excitation shots as sources, and fixed and mobile stations as receivers to record seismic data from May to August 2015. This paper presents results along a line from the western side of the Pearl River Estuary to the western side of the Baijing-Gaoming-Jinwan profile. A two-dimensional velocity structure was constructed using seismic travel-time tomography. The inversion results show that the Moho depth is 27 km in the coastal area and 30 km in the northwest of the Pearl River Estuary area, indicating that the crust thins from land to sea. Two structural discontinuities and multiple low-velocity anomalies appear in the crustal section. Inside both discontinuity zones, a low-velocity layer, with a minimum velocity of 6.05 km s^(-1), exists at a depth of about 15 km, and another, with a minimum velocity of 6.37 km s^(-1), exists at a depth of about 21.5 km between the middle and lower crust. These low velocities suggest that the discontinuities may consist of partly molten material. Earthquakes with magnitudes higher than 5.0 occurred in the low-velocity layer along the profile. The deep Kaiping-Enping fault, rooted in the crust, may be one of the most important channels for deep material upwelling and is related to tectonic movement since the Cretaceous in the Pearl River Delta tectonic rift basin.

关键词： Pearl River Estuary seismic sounding profile crustal structure Kaiping-Enping fault earthquake potential

初诊手术治疗胃肠间质瘤临床病理特征及预后因素的真实世界研究

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中华消化外科杂志 2024年第8期23卷 1080-1086页

作者：王晓娜曹景新王宝贵詹宏杰刘勇丁学伟刘宁张汝鹏梁寒天津医科大学肿瘤医院胃部肿瘤科、国家恶性肿瘤临床医学研究中心、天津市肿瘤防治重点实验室、天津市恶性肿瘤临床医学研究中心、天津市消化系统肿瘤重点实验室天津300060 天津市东丽医院普通外科天津300301

目的探讨初诊手术治疗胃肠间质瘤(GIST)的临床病理特征及预后因素。方法采用回顾性队列研究方法。收集2011年1月至2020年12月天津医科大学肿瘤医院收治的847例初诊手术治疗GIST患者的临床病理资料;男405例, 女442例;年龄为(60±10)岁。... 详细信息

目的探讨初诊手术治疗胃肠间质瘤(GIST)的临床病理特征及预后因素。方法采用回顾性队列研究方法。收集2011年1月至2020年12月天津医科大学肿瘤医院收治的847例初诊手术治疗GIST患者的临床病理资料;男405例, 女442例;年龄为(60±10)岁。正态分布的计量资料以x±s表示, 组间比较采用t检验。偏态分布的计量资料以M(范围)表示。计数资料以绝对数或百分比表示, 组间比较采用χ^(2)检验。等级资料比较采用非参数秩和检验。采用Kaplan-Meier法计算生存率。单因素分析采用Log-rank检验, 多因素分析采用COX回归模型。结果 (1)GIST临床病理特征。847例患者中, 肿瘤原发部位为胃585例、空肠和回肠142例、十二指肠76例、结直肠10例、食管3例、胃肠道外31例;合并肝转移13例, 合并腹腔转移22例;肿瘤最大径为(7±5)cm, 核分裂象为4(0~60)个/50高倍视野或5 mm2;美国国立卫生研究院(NIH)危险度分级为极低危31例、低危238例、中危213例、高危365例。847例患者中, CD117阳性839例, Dog-1阳性788例, CD34阳性710例;272例Ki-67指数<5%, 214例为5%~9%, 198例为≥10%, 163例未知;R0切除814例, 非R0切除33例。(2)GIST患者基因检测与术后辅助治疗。①基因检测情况:847例患者中, 424例行基因检测, 其中2011年、2012年、2013年、2014年、2015年、2016年、2017年、2018年、2019年、2020年基因检测率分别为1.89%(1/53)、9.76%(8/82)、8.45%(6/71)、15.66%(13/83)、50.00%(40/80)、55.26%(42/76)、73.86%(65/88)、68.27%(71/104)、80.65%(75/93)、88.03%(103/117)。424例行基因检测患者中, KIT突变338例, PDGFRA突变31例, 野生型55例。②辅助治疗情况:847例患者中, 253例行术后辅助治疗, 其中低、中、高危患者术后辅助治疗的比例分别为8.82%(21/238)、41.78%(89/213)、39.18%(143/365)。578例中高危患者中, 2011年、2012年、2013年、2014年、2015年、2016年、2017年、2018年、2019年、2020年术后辅助治疗比例分别为15.15%(5/33)、14.71%(10/68)、22.45%(11/49)、29.09%(16/55)、41.38 %(24/58)、46.15%(24/52)、32.81%(21/64)、60.00%(45/75)、60.42%(29/48)、61.84%(47/76)。253例术后辅助治疗患者中, 247例接受伊马替尼治疗、6例接受舒尼替尼治疗。(3)非胃来源和胃来源GIST临床病理特征的比较。847例患者中, 非胃来源和胃来源GIST分别为262例和585例, 两者性别、肿瘤数目、肿瘤最大径、Ki-67指数、NIH危险度分级、R0切除比较, 差异均有统计学意义(χ^(2)=8.62、8.40、12.97、6.57, Z=-6.15, χ^(2)=17.19, P<0.05)。(4)GIST患者无复发生存率的影响因素分析。多因素分析结果显示:初诊年度、原发部位、肿瘤最大径、核分裂象、NIH危险度分级、R0切除、基因检测、术后辅助治疗是影响初诊手术治疗GIST患者无复发生存率的独立因素(风险比=0.58, 0.61, 2.00, 1.71, 5.81, 2.56, 0.65, 0.38, 95%可信区间为0.39~0.85, 0.45~0.83, 1.46~2.74, 1.24~2.35, 3.16~10.69, 1.63~4.02, 0.46~0.94, 0.25~0.56, P<0.05)。结论初诊手术治疗GIST部位以胃多见, CD117和Dog-1阳性率高。GIST行基因检测和靶向治疗的人数逐年增加。非胃来源和胃来源GIST的临床病理特征及预后不同。初诊年度、原发部位、肿瘤最大径、核分裂象、NIH危险度分级、R0切除、基因检测、术后辅助治疗是影响初诊手术治疗GIST无复发生存率的独立因素。

关键词：胃肠道间质瘤手术临床病理无复发生存率预后

彩色超声联合二维超声对甲状腺乳头状癌颈部中央区淋巴结转移的诊断价值

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世界复合医学 2024年第5期10卷 179-182页

作者：闫媛媛吴燕王晓娜苏州市相城人民医院超声科江苏苏州215100

目的分析彩色超声、二维超声联合用于诊断甲状腺乳头状癌颈部中央区淋巴结转移的价值。方法选取2020年1月—2023年10月相城人民医院收治的96例疑似甲状腺乳头状癌患者作为研究对象,所有患者均接受彩色超声、二维超声检查,以病理结果... 详细信息

目的分析彩色超声、二维超声联合用于诊断甲状腺乳头状癌颈部中央区淋巴结转移的价值。方法选取2020年1月—2023年10月相城人民医院收治的96例疑似甲状腺乳头状癌患者作为研究对象,所有患者均接受彩色超声、二维超声检查,以病理结果为金标准,分别计算彩色超声、二维超声及联合诊断颈部中央区淋巴结转移的灵敏度、特异度及准确度。结果 96例疑似甲状腺乳头状癌患者经病理诊断,50例出现中央区淋巴结转移情况,占比52.08%。彩色超声、二维超声联合诊断灵敏度为98.00%、特异度为100.00%及准确度为98.96%,明显高于单一彩色超声(88.00%、95.65%、91.67%)及二维超声(84.00%、93.48%、88.54%)检查,差异有统计学意义(χ^(2)=8.490、6.125、7.233,P均<0.05)。结论彩色超声联合二维超声可诊断甲状腺乳头状癌患者有无颈部中央区淋巴结转移情况,准确度高。

关键词：彩色超声二维超声甲状腺乳头状癌颈部中央区淋巴结转移

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疾病预防控制机构公共卫生人才培养的优化

中国卫生标准管理 2024年第10期15卷 70-73页

作者：董佳兰许旭艳王晓娜福州市疾病预防控制中心业务质量管理科福建福州350001

文章通过全面分析现状和挑战,并提出相应的优化策略和建议,为疾病预防控制机构公共卫生人才培养和发展提供了指导,有助于提高疾病预防控制的效能和公众健康水平。首先比较了国内外公共卫生人才培养模式,并探讨了有效的培养方法。然后重... 详细信息

文章通过全面分析现状和挑战,并提出相应的优化策略和建议,为疾病预防控制机构公共卫生人才培养和发展提供了指导,有助于提高疾病预防控制的效能和公众健康水平。首先比较了国内外公共卫生人才培养模式,并探讨了有效的培养方法。然后重点关注公共卫生人才培养的优化策略,提出了针对性培养和完善培养体系的具体措施,包括根据行业发展需求实施针对性的人才培养,完善培养体系,提升公共卫生人才质量以及调整教育策略,强化实践教学等策略。通过文章的研析,希望能提出有效的公共卫生人才培养模式和方法,为疾病预防控制机构提供优质的公共卫生人才支持,从而提升公众健康水平。

关键词：公共卫生人才疾病预防培养模式挑战优化策略制度改革实践长效机制

The Growth-Promoting Mechanism of Brevibacillus laterosporus AMCC100017 on Apple Rootstock Malus robusta

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Horticultural Plant Journal 2022年第1期8卷 22-34页

作者： xiaona wang Jiucheng Zhang Xiaofei wang Jianping An Chunxiang You Bo Zhou Yujin Hao State Key Laboratory of Crop Biology College of Horticulture Science and EngineeringShandong Agricultural UniversityTai’anShandong 271018China Department of Microbiology College of Life SciencesShandong Agricultural UniversityTai’anShandong 271018China National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources Tai’anShandong 271018China

Plant growth-promoting rhizobacteria(PGPR) located in rhizobacteria soil are beneficial to plant growth and development. A PGPR strain AMCC100017 of Brevibacillus laterosporus synthesizes the plant hormone IAA in a tryptophan-dependent manner. In this study, the AMCC100017 strain was used to treat Malus robusta, an excellent natural rootstock for apple production, and assess its ability to promote growth. The fresh weight, dry weight, plant height, and lateral root growth of M. robusta were significantly increased with treatment. The presence of the AMCC100017 strain increased IAA content in M. robusta and promoted root secretion of tryptophan. Colonization of the strain in the roots allowed continuous synthesis of IAA and promoted plant growth. In addition, the photosynthetic efficiency in leaves increased after microbial treatment, and the utilization of nitrogen, zinc, iron, copper and magnesium in leaves was increased, which was conducive to ***, the activities of CAT and SOD, as well as the contents of ROS in plants colonized by AMCC100017 were increased compared to control plants, but the activities of POD and MDA contents were decreased. AMCC100017 strain affected the antioxidant capacity and stress resistance of plants. AMCC100017 strain increased the content of soluble protein and soluble sugar in plants, improved plant metabolic activity and stress resistance. Therefore, AMCC100017 not only increased IAA content and photosynthetic efficiency to promote M. robusta growth, but also affected plant through multiple metabolic pathways.

关键词： Malus robusta PGPR phytohormone photosynthetic efficiency

Preparation and evaluation of nattokinaseloaded self-double-emulsifying drug delivery system

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Asian Journal of Pharmaceutical Sciences 2015年第5期10卷 386-395页

作者： xiaona wang Sifan Jiang Xinyue wang Jie Liao Zongning Yin Key Laboratory of Drug Targeting and Drug Delivery Systems West China School of PharmacySichuan UniversityNo.17Block 3Southern Renmin RoadChengdu 610041China

In the present study,we prepared nattokinase-loaded self-double-emulsifying drug delivery system(SDEDDS)and investigated its preliminary *** type and concentration of oil phase,inner aqueous phase and emulsifier were screened to prepare optimum nattokinase-loaded ***,the optimum formulations were characterized based on microstructure,volume-weighted mean droplet size,self-emulsifying rate,yield,storage stability,in vitro release and in vivo pharmacodynamics *** water/oil/watermultiple emulsions exhibited typicalmultiple structure,with relatively small volumeweighted mean droplet size 6.0±0.7μm and high self-emulsifying ability(self-emulsifying time<2 min).Encapsulation of nattokinase was up to 86.8±8.2%.The cumulative release of nattokinase within 8 h was about 30%,exhibiting a sustained release *** pharmacodynamics study indicated that nattokinase-loaded SDEDDS could significantly prolong the whole blood clotting time in mouse and effectively improve the carrageenan-induced tail thrombosis compared with nattokinase ***,we showed that SDEDDS could successfully self-emulsify into water/oil/water multiple emulsions upon dilution in dispersion medium with gentle stirring and effectively protect nattokinase activity in gastric *** findings suggested that SDEDDS could be a promising strategy for peptide and protein drugs by oral administration.

关键词： Self-double-emulsifying drug delivery system Nattokinase Yield Release in vitro Pharmacodynamics study

舒芬太尼调节cAMP/PKA/CREB信号通路对卵巢癌细胞增殖、凋亡和侵袭的影响

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中国细胞生物学学报 2024年第3期46卷 445-455页

作者：甄磊张懿兰王晓娜焦颖保定市第二医院麻醉科保定071000 保定市第二医院妇科保定071000

该文旨在探究舒芬太尼(SFTN)调节环磷酸腺苷(cAMP)/蛋白激酶A(PKA)/环磷腺苷效应元件结合蛋白(CREB)信号通路对卵巢癌(OC)细胞增殖、凋亡和侵袭的影响。用浓度为2.5~160 ng/mL的舒芬太尼处理人OC细胞(SKOV-3),CCK-8法检测细胞活性,筛选... 详细信息

该文旨在探究舒芬太尼(SFTN)调节环磷酸腺苷(cAMP)/蛋白激酶A(PKA)/环磷腺苷效应元件结合蛋白(CREB)信号通路对卵巢癌(OC)细胞增殖、凋亡和侵袭的影响。用浓度为2.5~160 ng/mL的舒芬太尼处理人OC细胞(SKOV-3),CCK-8法检测细胞活性,筛选最佳药物浓度。将SKOV-3细胞分为对照组(Control组),舒芬太尼低、中、高浓度组(SFTN-L组、SFTN-M组、SFTN-H组),舒芬太尼高浓度+PKA激活剂组(SFTN-H+8-溴-cAMP组),平板克隆法检测细胞增殖;流式细胞术检细胞凋亡;划痕实验检测细胞迁移;Transwell实验检测细胞侵袭;ELISA法检测环磷酸腺苷(cAMP)水平;Western blot法检测细胞核增殖抗原标记物(Ki67)、细胞周期蛋白D1(Cyclin D1)、半胱氨酸蛋白酶-3(Caspase-3)、B细胞淋巴瘤-2相关X蛋白(Bax)、基质金属蛋白酶2(MMP-2)、基质金属蛋白酶9(MMP-9)、蛋白激酶A(PKA)、磷酸化蛋白激酶A(p-PKA)、环磷腺苷效应元件结合蛋白(CREB)、磷酸化环磷腺苷效应元件结合蛋白(p-CREB)蛋白表达情况;裸鼠移植瘤实验检测舒芬太尼对OC移植瘤生长的影响。选择舒芬太尼浓度为20 ng/mL、40 ng/mL、80 ng/mL进行后续实验。与Control组比较,SFTN-L、SFTN-M、SFTN-H组的集落形成数、细胞划痕愈合率、细胞侵袭数量及Ki67、CyclinD1、MMP-2、MMP-9、cAMP、p-PKA/PKA、p-CREB/CREB表达水平降低,细胞凋亡率及Caspase-3、Bax表达水平显著升高,且呈浓度依赖性(P<0.05);与SFTN-H组相比,SFTN-H+8-溴-cAMP组的集落形成数、划痕愈合率、细胞侵袭数量及Ki67、Cyclin D1、MMP-2、MMP-9、cAMP、p-PKA/PKA、p-CREB/CREB表达水平升高,细胞凋亡率及Caspase-3、Bax表达水平显著降低(P<0.05)。移植瘤实验显示,SFTN组小鼠移植瘤比Control组生长缓慢,移植瘤质量、体积均减小,cAMP、p-PKA/PKA、p-CREB/CREB表达水平降低(P<0.05)。舒芬太尼通过抑制cAMP/PKA/CREB信号通路从而抑制OC细胞增殖和侵袭,促进细胞凋亡。

关键词：卵巢癌舒芬太尼环磷酸腺苷(cAMP)/蛋白激酶A(PKA)/环磷腺苷效应元件结合蛋白(CREB)信号通路增殖凋亡侵袭

Satisfactory surgical outcome of T2 gastric cancer after modified D2 lymphadenectomy

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Chinese Journal of Cancer Research 2017年第2期29卷 100-108页

作者： Shupeng Zhang Liangliang WU xiaona wang Xuewei Ding Han Liang Department of General Surgery the Fifth Central Hospital of Tianjin Tianjin 300450 China Department of Gastric Cancer Tianjin Medical University Cancer Institute & Hospital National Clinical Research Center of Cancer Key Laboratory of Cancer Prevention and Therapy Tianjin's Clinical Research Center for Cancer Tianjin 300060 China

Objective： Though D2 lymphadenectomy has been increasingly regarded as standard surgical procedure for advanced gastric cancer （GC）, the modified D2 （D 1＋7, 8a and 9） lymphadenectomy may be more suitable than D2 dissection for T2 stage GC. The purpose of this study is to elucidate whether the surgical outcome of modified D2 lymphadenectomy was comparable to that of standard D2 dissection in T2 stage GC patients. Methods： A retrospective cohort study with 77 cases and 77 controls matched for baseline characteristics was conducted. Patients were categorized into two groups according to the extent of lymphadenectomy： the modified D2 group （roD2） and the standard D2 group （D2）. Surgical outcome and recurrence date were compared between the two groups. Results： The 5-year overall survival （OS） rate was 71.4% for patients accepted mD2 lymphadenectomy and 70.1% for those accepted standard D2, respectively, and the difference was not statistically significant. Multivariate survival analysis revealed that curability, tumor size, TNM stage and postoperative complications were independently prognostic factors for T2 stage GC patients. Patients in the mD2 group tended to have less intraoperative blood loss （P=0.001） and shorter operation time （P〈0.001） than those in the D2 group. While there were no significant differences in recurrence rate and types, especially lymph node recurrence, between the two groups. Conclusions： The surgical outcome of mD2 lymphadenectomy was equal to that of standard D2, and the use of mD2 instead of standard D2 can be a better option for T2 stage GC.

关键词： Gastric carcinoma T2 modified D2 lymphadenectomy prognosis complication