检索结果-南通市图书馆

Transient features of graphitization and nitrogen-vacancy color centers in a diamond fabricated by localization femtosecond laser direct writing

引用

Science China(Technological Sciences) 2024年第8期67卷 2530-2536页

作者： cui lin YIN SiYu HU ZiFan WANG Lei State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

Femtosecond laser direct writing provides an efficient approach to fabricating single nitrogen vacancy(NV) color centers with a relatively high yield. Different from previously reported NV color centers with a random distribution in a bulk diamond or nanocrystals, this gives an opportunity to study the photophysical properties of single NV color centers with precise numbers and positions. However, ultrafast studies on single NV color centers prepared by localization femtosecond laser direct writing are still rare, especially for the graphitization inside a diamond and its relationship with single NV color centers. Here, we report the broadband transient absorption(TA) spectroscopic features of the graphitization and NV color centers in a diamond fabricated by localization femtosecond laser direct writing at room temperature under 400 nm excitation. In comparison with the graphene oxide film, the bleaching features of the graphitization point array in a diamond are similar to reduced graphene oxide,accompanied by excited state absorption signals from local carbon atom vacancy defects in graphene-like structures induced by laser writing. On the other hand, transient features of laser processing array containing single NV color centers with a yield of~50% are different from those of the graphitization point array. Our findings suggest that for ultrashort pulse processing of diamonds, broadband TA spectral signals are sensitive to the surrounding atomic environment of processing sites, which could be applied to laser writing point defects in other materials used as solid-state single photon sources.

关键词： nitrogen-vacancy color center graphitization diamond femtosecond laser direct writing ultrafast spectroscopy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hot-exciton effects on exciton diffusion and circular polarization dynamics in a single PbI_(2)nanoflake

引用

Science China(Technological Sciences) 2024年第1期67卷 83-90页

作者： XU ChenYu WANG Lei cui lin GAO BingRong WANG HaiYu State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

As one of the emerging two-dimensional lead halide materials,lead iodide(PbI_(2))nanosheets have proven to possess strong application potential in the fields of high-energy radiation detection and highly efficient perovskite solar ***,the underlying photophysical properties such as hot-exciton-related carrier dynamics remain unclear for PbI_(2)***,we report the exciton dynamics of a single PbI_(2)nanoflake prepared by an aqueous solution *** a three-dimensional(3D)diffusion model,we obtain the exciton annihilation radius and diffusion coefficient of a single PbI_(2)nanoflake under nonresonant and resonant excitation conditions of band-edge exciton *** initial exciton densities increase,we find the carrier recombination mechanism for a single PbI_(2)nanoflake gradually changes from exciton-exciton annihilation to free-carrier ***,we reveal the room-temperature circular polarization of a single PbI_(2)nanoflake is due to free-carrier recombination with a band-edge exciton dissociation time of~120 fs under the resonant excitation condition.

关键词： single PbI_(2)nanoflake exciton diffusion room-temperature circular polarization ultrafast spectroscopy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Impact of H_(2)S on Hg^(0)capture performance over nitrogen-doped carbon microsphere sorbent:experimental and theoretical insights

引用

Frontiers of Chemical Science and Engineering 2024年第3期18卷 89-100页

作者： Guopei Zhang Xiaoyang Zhang Xiangwen Xing Xiangru Kong lin cui Dong Yong National Engineering Laboratory for Reducing Emissions from Coal Combustion Shandong UniversityJinan250061China Bingtuan Energy Development Institute Shihezi UniversityShihezi832000China

A nitrogen-doped carbon microsphere sorbent with a hierarchical porous structure was synthesized via aggregation-hydrothermal *** Hg^(0)adsorption performance of the nitrogen-doped carbon microsphere sorbent was tested and compared with that of the coconut shell activated carbon prepared in the *** effect of H_(2)S on Hg^(0)adsorption was also *** nitrogen-doped carbon microsphere sorbent exhibited superior mercury removal performance compared with that of coconut shell activated *** the absence of H_(2)S at a low temperature(≤100℃),the Hg^(0)removal efficiency of the nitrogen-doped carbon microsphere sorbent exceeded 90%.This value is significantly higher than that of coconut shell activated carbon,which is approximately 45%.H_(2)S significantly enhanced the Hg^(0)removal performance of the nitrogen-doped carbon microsphere sorbent at higher temperatures(100–180℃).The hierarchical porous structure facilitated the diffusion and adsorption of H_(2)S and Hg^(0),while the nitrogen-containing active sites significantly improved the adsorption and dissociation capabilities of H_(2)S,contributing to the generation of more active sulfur species on the surface of the nitrogen-doped carbon microsphere *** formation of active sulfur species and HgS on the sorbent surface was further confirmed using X-ray photoelectron spectroscopy and Hg^(0)temperature-programmed desorption *** functional theory was employed to elucidate the adsorption and transformation of Hg^(0)on the sorbent surface.H_(2)S adsorbed and dissociated on the sorbent surface,generating active sulfur species that reacted with gaseous Hg^(0)to form HgS.

关键词： nitrogen-doped carbon microsphere H_(2)S Hg^(0)removal adsorption mechanism

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Engineering singlet and triplet excitons of TADF emitters by different host-guest interactions

Aggregate

引用

Aggregate 2024年第1期5卷 337-344页

作者： Wei Zhang Jie Kong Rui Zhi An Jiachen Zhang Yujie Zhou lin-Song cui Meng Zhou Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefeiChina Key Laboratory of Precision and Intelligent Chemistry University of Science and Technology of China(USTC)HefeiChina CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefeiChina

Understanding the host-guest interactions for thermally activated delayed fluorescence(TADF)emitters is critical because the interactions between the host matrices and TADF emitters enable precise control on the optoelectronic performance,whereas technologically manipulating the singlet and triplet excitons by using different kinds of host-guest interactions remains ***,we report a comprehensive picture that rationalizes host-guest interaction-modulated exciton recombination by using time-resolved *** found that the early-time relaxation is accelerated in polar polymer because dipole-dipole interaction facilitates the stabilization of the 1CT ***,an opposite trend is observed in longer delay time,and faster decay in the less polar polymer is ascribed to theπ-πinteraction that plays the dominant role in the later stage of the excited *** findings highlight the technological engineering singlet and triplet excitons using different kinds of host-guest interactions based on their electronic characteristics.

关键词： host-guest interaction singlet TADF triplet

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Application and mechanisms of Sanhua Decoction in the treatment of cerebral ischemia-reperfusion injury

引用

World Journal of Clinical Cases 2024年第4期12卷 688-699页

作者： Ya-Kuan Wang Huang lin Shu-Rui Wang Ru-Tao Bian Yang Tong Wen-Tao Zhang Ying-lin cui Department of Encephalopathy The Second Clinical College of Henan University of Chinese MedicineZhengzhou 450000Henan ProvinceChina Department of Encephalopathy Henan Provincial Hospital of Integrated Chinese and Western MedicineZhengzhou 450000Henan ProvinceChina Department of Traditional Chinese Medicine Classics Henan Provincial Hospital of Traditional Chinese Medicine(The Second Affiliated Hospital of Henan University of Chinese Medicine)Zhengzhou 450000Henan ProvinceChina Department of Central Laboratory Zhengzhou Traditional Chinese Medicine HospitalZhengzhou 450000Henan ProvinceChina Department of Encephalopathy Henan Provincial Hospital of Traditional Chinese Medicine(The Second Affiliated Hospital of Henan University of Chinese Medicine)Zhengzhou 450000Henan ProvinceChina Famous Doctor Hall Henan Provincial Hospital of Traditional Chinese Medicine(The Second Affiliated Hospital of Henan University of Chinese Medicine)Zhengzhou 450000Henan ProvinceChina

Cerebral ischemia-reperfusion is a process in which the blood supply to the brain is temporarily interrupted and subsequently ***,it is highly likely to lead to further aggravation of pathological damage to ischemic tissues or the nervous system.,and has accordingly been a focus of extensive clinical *** a traditional Chinese medicinal formulation,Sanhua Decoction has gradually gained importance in the treatment of cerebrovascular *** main constituents include Citrus aurantium,Magnolia officinalis,rhubarb,and Qiangwu,which are primarily used to regulate *** the treatment of neurological diseases,the therapeutic effects of the Sanhua Decoction are mediated via different pathways,including antioxidant,anti-inflammatory,and neurotransmitter regu-latory pathways,as well as through the protection of nerve cells and a reduction in cerebral *** the studies conducted to date,many have found that the application of Sanhua Decoction in the treatment of neurological diseases has clear therapeutic *** addition,as a natural treatment,the Sanhua Decoction has received widespread attention,given that it is safer and more effective than traditional Western ***,research on the mechanisms of action and efficacy of the Sanhua Decoctions in the treatment of cerebral ischemia-reperfusion injury is of considerable *** this paper,we describe the pathogenesis of cerebral ischemia-reperfusion injury and review the current status of its treatment to examine the therapeutic mechanisms of action of the Sanhua *** hope that the findings of the research presented herein will contribute to a better understanding of the efficacy of this formulation in the treatment of cerebral ischemia-reperfusion,and provide a scientific basis for its application in clinical practice.

关键词： Sanhua Decoction Cerebral ischemia-reperfusion Mechanism of action Application progress Traditional Chinese medical science Review

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Risk of cardiovascular death in patients with hepatocellular carcinoma based on the Fine-Gray model

引用

World Journal of Gastrointestinal Oncology 2024年第3期16卷 844-856页

作者： Yu-Liang Zhang Zi-Rong Liu Zhi Liu Yi Bai Hao Chi Da-Peng Chen Ya-Min Zhang Zi-lin cui First Central Clinical College Tianjin Medical UniversityTianjin 300070China Department of Hepatobiliary Surgery Tianjin First Central HospitalSchool of MedicineNankai UniversityTianjin 300192China

BACKGROUND Hepatocellular carcinoma(HCC)is one of the most common types of cancers worldwide,ranking fifth among men and seventh among women,resulting in more than 7 million deaths *** the development of medical tech-nology,the 5-year survival rate of HCC patients can be increased to 70%.How-ever,HCC patients are often at increased risk of cardiovascular disease(CVD)death due to exposure to potentially cardiotoxic treatments compared with non-HCC ***,CVD and cancer have become major disease burdens ***,further research is needed to lessen the risk of CVD death in HCC patient *** This study was conducted on the basis of the Surveillance,Epidemiology,and End Results database and included HCC patients with a diagnosis period from 2010 to *** independent risk factors were identified using the Fine-Gray model.A nomograph was constructed to predict the CVM in HCC *** nomograph performance was measured using Harrell’s concordance index(C-index),calibration curve,receiver operating characteristic(ROC)curve,and area under the ROC curve(AUC)***,the net benefit was estimated via decision curve analysis(DCA).RESULTS The study included 21545 HCC patients,of whom 619 died of ***(5 cm:2.090(1.543-2.830),P<0.001],surgery(no)[0.376(0.297-0.476),P<0.001],and chemotherapy(none/unknown)[0.578(0.472-0.709),P<0.001]were independent risk factors for CVD death in HCC *** discrimination and calibration of the nomograph were *** C-index values for the training and validation sets were 0.736 and 0.665,*** AUC values of the ROC curves at 2,4,and 6 years were 0.702,0.725,0.740 in the training set and 0.697,0.710,0.744 in the validation set,*** calibration curves showed that the

关键词： Hepatocellular carcinoma Cardiovascular disease deaths Fine-Gray model Risk factor Nomograph Predict

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

消费率与工业化:一个跨国实证研究

引用

上海经济研究 2024年第4期 80-90页

作者：崔琳中共中央党校(国家行政学院)经济学教研部 100091

消费是一国经济发展的直观反映,本文利用跨国数据,研究以工业增加值占比为代表的工业化程度对一国消费率的影响。研究发现:工业化导致消费率降低,即使考虑到工业化过程中投资率上升挤压消费率、经济发展初期必选消费品占比快速下滑等因... 详细信息

消费是一国经济发展的直观反映,本文利用跨国数据,研究以工业增加值占比为代表的工业化程度对一国消费率的影响。研究发现:工业化导致消费率降低,即使考虑到工业化过程中投资率上升挤压消费率、经济发展初期必选消费品占比快速下滑等因素,这种影响依然存在。影响机制上,伴随工业化过程中劳动报酬占比的下降是导致居民消费能力相对不足的重要原因,更为平等的收入分配结构能够大幅抑制工业化对于消费率的负向影响。对于低收入国家而言,尽管过早去工业化能够提升消费率,但需要付出经济增长放缓的巨大代价。从我国来看,当前工业占比超过约九成国家,收入均等化尚有进一步改善空间,在经济发展过程中难以避免出现消费率偏低的现象。未来我国消费率的根本改善与居民整体收入水平的提高密切相关,依赖于经济发展过程中收入分配体系的持续优化以及投资效率和质量的有效提升。

关键词：消费率工业化经济发展产业结构收入均等化

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A newly proposed heatstroke-induced coagulopathy score in patients with heat illness: A multicenter retrospective study in China

引用

Chinese Journal of Traumatology 2024年第2期27卷 83-90页

作者： Qing-Wei lin lin-cui Zhong Long-Ping He Qing-Bo Zeng Wei Zhang Qing Song Jing-Chun Song Department of Critical Care Medicine The 908th Hospital of Chinese PLA Logistic Support ForcesNanchang360104Jiangsu ProvinceChina Department of Emergency Medicine The 900th Hospital of Chinese PLA Logistic Support ForcesFuzhou350000China Department of Critical Care Medicine Hainan Hospital of Chinese PLA General HospitalSanya572013Hainan ProvinceChina

Purpose:In patients with heatstroke, disseminated intravascular coagulation (DIC) is associated with greater risk of in-hospital mortality. However, time-consuming assays or a complex diagnostic system may delay immediate treatment. Therefore, the present study proposes a new heatstroke-induced coagulopathy (HIC) score in patients with heat illness as an early warning indicator for ***:This retrospective study enrolled patients with heat illness in 24 Chinese hospitals from March 2021 to May 2022. Patients under 18 years old, with a congenital clotting disorder or liver disease, or using anticoagulants were excluded. Data were collected on demographic characteristics, routine blood tests, conventional coagulation assays and biochemical indexes. The risk factors related to coagulation function in heatstroke were identified by regression analysis, and used to construct a scoring system for HIC. The data of patients who met the diagnostic criteria for HIC and International Society on Thrombosis and Haemostasis defined-DIC were analyzed. All statistical analyses were performed using SPSS ***:The final analysis included 302 patients with heat illness, of whom 131 (43.4%) suffered from heatstroke, including 7 death (5.3%). Core temperature (OR = 1.681, 95% CI 1.291 - 2.189, p < 0.001), prothrombin time (OR = 1.427, 95% CI 1.175 - 1.733, p < 0.001) and D-dimer (OR = 1.242, 95% CI 1.049 - 1.471, p = 0.012) were independent risk factors for heatstroke, and therefore used to construct an HIC scoring system because of their close relation with abnormal coagulation. A total score ≥ 3 indicated HIC, and HIC scores correlated with the score for International Society of Thrombosis and Hemostasis-DIC (r = 0.8848, p < 0.001). The incidence of HIC (27.5%) was higher than that of DIC (11.2%) in all of 131 heatstroke patients. Meanwhile, the mortality rate of HIC (19.4%) was lower than that of DIC (46.7%). When HIC developed into DIC, parameters of coagulation dysfunct

关键词： Heat illness Heatstroke Coagulation disorders Diagnosis Disseminated intravascular coagulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Intratumoural microorganism can affect the progression of hepatocellular carcinoma

引用

World Journal of Gastrointestinal Oncology 2024年第10期16卷 4232-4243页

作者： Bao-Qun Liu Yi Bai Da-Peng Chen Ya-Min Zhang Tian-Ze Wang Jing-Rui Chen Xiang-Yu Liu Bin Zheng Zi-lin cui First Central Clinical College Tianjin Medical UniversityTianjin 300070China Department of Hepatobiliary Surgery Tianjin First Central HospitalSchool of MedicineNankai UniversityTianjin 300192China Tianjin First Central Hospital Clinic Institute School of MedicineNankai UniversityTianjin 300192China School of Medicine Tianjin UniversityTianjin 300072China

BACKGROUND Several recent studies have confirmed that intratumoural microorganisms can affect the occurrence and development of hepatocellular carcinoma(HCC);however,their role in tumor progression remains ***,there is a need for further research on the role of intratumoural microorganisms in *** To investigate the changes in intratumoural microorganisms in HCC and the effect of Propionibacterium on HCC *** HCC and normal liver tissue specimens were subjected to fluorescence in situ hybridization(FISH).After performing 16S rRNA sequencing on HCC and peritumoral tissues to analyze the differences between the two *** was cocultured with HCC cells in *** in cell proliferation and migration capacity were *** expression of NF-κB pathway related proteins in tumor cells was *** orthotopic liver implantation model and the subcutaneous xenograft model were *** tissues and subcutaneous tumors were collected 2 weeks *** FISH demonstrated the presence of microorganisms in HCC and normal liver tissues.16S rRNA sequencing revealed an abundance of Lysobacter,Lachnospiraceae,Pseudomonas,and Lactobacillus in HCC *** distribution and abundance of Propionibacterium showed differences between HCC and peritumoral tissues(Pling pathway also decreased in HCC cells(P<0.05).CONCLUSION Microorganisms in HCC and normal liver tissues displayed significant *** PA-producing bacterium Propionibacterium in HCC exerts an effect on the NF-κB pathway,thereby affecting the biological behavior of HCC.

关键词： Hepatocellular carcinoma Intratumoural microbiome 16S rRNA sequencing Propionibacterium

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

黄河流域乡村旅游重点村及其网络关注度空间分异规律

引用

西北大学学报（自然科学版） 2024年第3期54卷 472-488页

作者：温秀黄枭崔林西北大学经济管理学院陕西西安710127 西安文理学院历史文化旅游学院陕西西安710065

黄河流域乡村旅游的高质量发展成为乡村振兴战略、黄河流域生态保护和高质量发展战略实施的有力抓手。以黄河流域386个乡村旅游重点村为样本点,运用地理空间分析方法,研究黄河流域乡村旅游及其网络关注度的空间格局及差异。研究发现:(1... 详细信息

黄河流域乡村旅游的高质量发展成为乡村振兴战略、黄河流域生态保护和高质量发展战略实施的有力抓手。以黄河流域386个乡村旅游重点村为样本点,运用地理空间分析方法,研究黄河流域乡村旅游及其网络关注度的空间格局及差异。研究发现:(1)黄河流域乡村旅游重点村及其网络关注度在空间分布上均呈集聚态势。乡村旅游重点村形成甘青交界区、宁夏北部、河南北部、山东中部和四川中部五大集聚区,网络关注度集中在山东中部、四川中部、宁夏北部、陕西中部区域,内蒙古、甘肃西部、青海西部的关注度偏低,没有形成明显的集聚。(2)乡村旅游重点村及其网络关注度的集聚分布存在空间差异。山东中部、四川中部、宁夏北部区域乡村旅游重点村和网络关注度都呈现高度集聚;甘青交界乡村旅游重点村集聚,但网络关注度较低且分散;陕西中部区域乡村旅游重点村数量较少,但网络关注度呈现高度聚集;内蒙古、青海西部、陕西北部区域的重点村空间集聚度低、网络关注度低。(3)乡村旅游重点村及其网络关注度在空间关联上具有明显的差异性,黄河流域乡村旅游重点村的冷热点区分布与网络关注度的冷热点分布呈现倒置。根据研究的结论,在空间分析的基础上,提出乡村旅游空间格局优化和营销管理的建议。

关键词：乡村旅游空间格局黄河流域

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：