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白洋淀上游典型林分类型土壤理化性质及其化学计量特征

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土壤通报 2024年第4期55卷 960-967页

作者：史丽娟吕海涛张树梓李联地任启文冯广河北省林业和草原科学研究院河北石家庄050061 河北小五台山森林生态系统国家定位观测研究站河北涿鹿075600 河北省林业和草原工程项目中心河北石家庄050081 河北省森林城市建设技术创新中心河北石家庄050061 海南大学热带农林学院海南海口570228

【目的】白洋淀上游规模化林场是改善京津冀地区生态环境、保障雄安新区及周边生态安全的绿色屏障。研究该区不同林分类型土壤理化性质,了解不同林分土壤肥力情况,以期为后续人工林的经营和管理提供科学参考。【方法】选取4种典型林分:... 详细信息

【目的】白洋淀上游规模化林场是改善京津冀地区生态环境、保障雄安新区及周边生态安全的绿色屏障。研究该区不同林分类型土壤理化性质,了解不同林分土壤肥力情况,以期为后续人工林的经营和管理提供科学参考。【方法】选取4种典型林分:刺槐、油松、蒙古栎和栓皮栎为研究对象,测定其0~20 cm和20~40 cm土层土壤理化性质,计算碳(C)、氮(N)、磷(P)化学计量比,并进行差异性检验和相关性分析。【结果】蒙古栎林的土壤容重最小,孔隙度最大,持水量最高,其他林分类型之间土壤物理性质差异不显著。刺槐林土壤有机质、全磷、速效磷含量较高,全钾、速效钾含量偏低;油松林土壤pH值较低,土壤酸化较为严重,有机质、全氮、碱解氮含量偏低;蒙古栎林土壤拥有较高的全氮、碱解氮含量;栓皮栎林土壤表现为较低的磷含量和较高的钾含量。根据土壤C、N、P化学计量特征,本研究区4种林分类型在0~40 cm土层C∶N、C∶P、N∶P的变化范围为18.87~40.54、25.10~95.32、0.95~6.06,油松林土壤C∶N最高,C∶P、N∶P最低,栓皮栎林C∶N最低,N∶P最高;蒙古栎林C∶P最高。【结论】研究区土壤有机质矿化速率较低,植物生长受氮限制,油松林氮受限最严重,栓皮栎林土壤有机质更易矿化分解,氮限制程度较弱。

关键词：林分类型土壤理化性质化学计量特征

中药复方对绵羊生长性能、血清生化指标、免疫和抗氧化功能的影响

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饲料研究 2024年第9期47卷 1-6页

作者：何振莲于天力任靖宇韩怡静裴彩霞山西农业大学动物科学学院山西晋中030801

试验旨在研究高精料饲粮中添加中药复方对绵羊生长性能、养分表观消化率、血清生化指标、免疫、抗炎和抗氧化功能的影响。选取30只体重(20.81±1.27)kg的3月龄杜寒杂交公羔,随机分为3组,每组10个重复,每个重复1只羊。基础饲粮精粗比为75... 详细信息

试验旨在研究高精料饲粮中添加中药复方对绵羊生长性能、养分表观消化率、血清生化指标、免疫、抗炎和抗氧化功能的影响。选取30只体重(20.81±1.27)kg的3月龄杜寒杂交公羔,随机分为3组,每组10个重复,每个重复1只羊。基础饲粮精粗比为75∶25,对照组、Z1组和Z3组的中药复方添加量分别为0、10、30 g/d。预试期15 d,正式试验期50 d。结果显示,与对照组相比,添加30 g/d中药复方可以提高绵羊的末重和平均日增重(P<0.05),降低料重比(P<0.05),提高粗蛋白表观消化率(P<0.05),降低血清尿素氮的含量(P<0.05),降低血清中甘油三酯含量(P<0.05),增加低密度脂蛋白胆固醇和高密度脂蛋白胆固醇含量(P<0.05),提高血清中总抗氧化能力以及过氧化氢酶、谷胱甘肽过氧化物酶和总超氧化物歧化酶的活性(P<0.05),降低血清中丙二醛含量(P<0.05),提高血清中酸性磷酸酶、溶菌酶活性以及免疫球蛋白、干扰素-γ含量(P<0.05),降低血清中一氧化氮、脂多糖、白细胞介素-1β、白细胞介素-6和肿瘤坏死因子-α含量(P<0.05)。研究表明,在高精料饲粮中添加30 g/d的中药复方可以提高绵羊的抗氧化能力和免疫功能,降低血清促炎因子水平,缓解机体炎症,提高绵羊的日增重和养分表观消化率,对保持绵羊机体健康具有积极影响。

关键词：高精料饲粮中草药添加剂绵羊生长性能免疫力抗氧化能力

Determination and correlation solubility of m-phenylenediamine in (methanol, ethanol, acetonitrile and water) and their binary solvents from 278.15 K to 313.15 K

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Chinese Journal of Chemical Engineering 2019年第5期27卷 1149-1158页

作者： Pengbao lian Huipeng Zhao Jianlong Wang Lizhen Chen Yong Xiang Qinghua ren School of Chemical Engineering and Technology North University of ChinaTaiyuan 030051China Sichuan North Hongguang Special Chemical Co. Ltd.Yibin 644100China

In this study, the solubility of m-phenylenediamine in four pure solvents(methanol, ethanol, acetonitrile and water) and three binary solvent(methanol + water),(ethanol + water) and(acetonitrile + water) systems were determined in the temperature ranging from 278.15 K to 313.15 K by using the gravimetric method under atmospheric pressure. In the temperature range of 278.15 K to 313.15 K, the mole fraction solubility values of m-phenylenediamine in water, methanol, ethanol, and acetonitrile are 0.0093–0.1533, 0.1668–0.5589,0.1072–0.5356, and 0.1717–0.6438, respectively. At constant temperature and solvent composition, the mole fraction solubility of o-phenylenediamine in four pure solvents was increased as the following order:water b ethanol b methanol b acetonitrile;and in the three binary solvent mixtures could be ranked as follows:(ethanol + water) b(methanol + water) b(acetonitrile + water). The relationship between the experimental temperature and the solubility of m-phenylenediamine was revealed as follows: the solubility of mphenylenediamine in pure and binary solvents could be increased with the increase of temperature. The experimental values were correlated with the Jouyban–Acree model, van’t Hoff–Jouyban–Acree model, modified Apelblat–Jouyban–Acree model, Sun model and Ma model. The standard dissolution enthalpy, standard dissolution entropy and the Gibbs energy were calculated based on the experimental solubility data. In the binary solvent mixtures, the dissolution of m-phenylenediamine could be an endothermic process. The solubility data,correlation equations and thermodynamic property obtained from this study would be invoked as basic data and models regarding the purification and crystallization process of m-phenylenediamine.

关键词： m-Phenylenediamine Solubility Solid-liquid equilibrium Jouyban-Acree model Thermodynamic property

Study on the Expression Levels of CXCR4, CXCL12, CD44, and CD147 and Their Potential Correlation with Invasive Behaviors of Pituitary Adenomas

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Biomedical and Environmental Sciences 2013年第7期26卷 592-598页

作者： XING Bing KONG Yan Guo YAO Yong lian Wei WANG ren Zhi ren Zu Yuan Departments of Neurosurgery Key Laboratory of Endocrinology Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College

Objective To evaluate the factors of CXCR4, CXCL12, CD44, and CD147 as early potential diagnostic biomarkers by determining their expression levels in invasive and non-invasive pituitary adenomas. Methods Fresh pituitary adenoma specimens were collected from 35 pituitary adenoma （21 invasive and 14 non-invasive） patients who underwent surgical treatment in our Neurosurgery Department between January and April of 2009. The expression levels of CXCR4, CXCL12, CD44, and CD147 were evaluated firstly by flow cytometry, fluorescence microscopy in single cell suspensions, and then by immunohistochemical staining of paraffin tissue sections. Results Flow cytometric analyses showed that the percentage of CXCR4- and CXCL12-positive cells from invasive pituitary adenomas （IPA） was significantly higher in the single cell suspensions than that from non-invasive pituitary adenomas （nlPA）（P〈O.05）. Immunohistochemical staining revealed that CXCR4 and CXCL12 staining index scores of the invasive pituitary adenomas were significantly higher than those of the non-invasive pituitary adenomas （P〈O.05）. In contrast, neither flow cytometry nor immunohistochemical staining demonstrated significant difference between CD44 and CD147 expression levels, respectively. Conclusion Expression levels of CXCR4 and CXCL12 are correlated with the invasiveness of pituitary adenomas. Therefore, rather than CD44 and CD147, CXCR4 and CXCL12 may potentially serve as biomarkers for early detection of pituitary adenomas.

关键词： Pituitary adenoma Invasiveness Flow cytometry Immunohistochemistry CXCR4, CXCL12,CD44, and CD147

骨形态发生蛋白4诱导下骨骼肌内异位骨化的细胞来源

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中国组织工程研究 2024年第25期28卷 4034-4040页

作者：余洋溢廉强吴建群张轩任晋可李广恒深圳市肌肉骨骼组织重建与功能恢复重点实验室关节骨科深圳市人民医院(暨南大学第二临床医学院南方科技大学第一附属医院)广东省深圳市510515

背景:骨骼肌异位骨化是临床上严重的并发症。对于骨骼肌异位骨化而言,其参与成骨过程中的细胞仍不明确。目的:观察肌细胞及筋膜细胞以及内皮细胞在骨肌中异位骨化过程中的参与情况,观察骨形态发生蛋白4诱导下骨骼肌内异位骨化的细胞来... 详细信息

背景:骨骼肌异位骨化是临床上严重的并发症。对于骨骼肌异位骨化而言,其参与成骨过程中的细胞仍不明确。目的:观察肌细胞及筋膜细胞以及内皮细胞在骨肌中异位骨化过程中的参与情况,观察骨形态发生蛋白4诱导下骨骼肌内异位骨化的细胞来源。方法:培养C2C12细胞和诱导培养基数天下C 2 C 12细胞形成的肌管,将质量浓度500 ng/mL骨形态发生蛋白4分别加入培养基后,显微镜下观察处理10 d内C2C12细胞和肌管是否继续增殖;按不同比例共培养大鼠肌细胞(L6)和人成纤维源性细胞(fibroblast-derived cells,FDC),通过番红O染色和阿尔新蓝染色研究上述细胞在质量浓度500 ng/mL的骨形态发生蛋白4和质量浓度10 ng/mL的转化生长因子β3处理下21 d内成骨和成软骨分化潜力。使用转基因动物FVB/N-TgN(TIE2-LacZ)182Sato小鼠,通过在基因鼠大腿肌间隙植入含有15μL的腺相关病毒-骨形态发生蛋白4(5×1010 PFU/mL)10 d及14 d,再通过X-gal染色来观察异化骨中有无新血管内皮生成。结果与结论:①骨形态发生蛋白4导致肌束退化并增加C2C12细胞增殖。与其他组相比,FDC组具有较高的阿尔新蓝和番红O染色面积(P<0.05)和较低碱性磷酸酶染色面积(P<0.05);而L6组和其他组相比具有更大的碱性磷酸酶染色面积(P<0.05),但阿尔新蓝和番红O染色面积较小(P<0.05)。②将腺相关病毒-骨形态发生蛋白4吸附的明胶海绵移植到FVB/N-TgN(TIE2-LacZ)182Sato小鼠中会导致异位骨化。③X-gal染色结果显示,在软骨细胞及异化骨中无明显染色,提示Tie2+内皮细胞不参与异位骨化的形成。④结果证实,在腺相关病毒-骨形态发生蛋白4诱导的骨骼肌异位软骨化过程中,成纤维细胞是软骨细胞的主要细胞来源,而肌源性细胞是成骨细胞的主要来源。Tie2+内皮细胞可能不是软骨和骨的细胞来源。

关键词：异位骨化骨形态发生蛋白4 肌源性细胞纤维源性细胞 Tie2+内皮细胞骨骼肌成骨细胞软骨细胞肌周膜肌束

Absolute Angular Displacement Determination Based on Laser-Frequency Splitting Technology

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Chinese Physics Letters 2012年第5期29卷 111-114页

作者： ren Cheng YANG Xing-Tuan ZHANG Shu-lian Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing 102201 Department of Precision Instruments and Mechanology Tsinghua UniversityBeijing 100084

We introduce an angle measurement system based on laser-frequency splitting technology,which is capable of absolute angular displacement *** core part is a dual-frequency microchip Nd:YAG laser which has two quarter-wave plates in the laser resonator and outputs two orthogonally linearly polarized lights with variable intermode frequency.A rotation of one of the wave plates shifts the frequency difference between *** angular displacement can thus be examined by detecting the shift of the frequency *** principle of the dual-frequency laser is demonstrated.A setup developed to accomplish angular displacement determinations and the experimental results of using this setup are then presented.

关键词： Nd:YAG resonator displacement

Relation Enhanced Neural Model for Type Classification of EntityMentions with a Fine-Grained Taxonomy

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Journal of Computer Science & Technology 2017年第4期32卷 814-827页

作者： Kai-Yuan Cui Peng-Jie ren Zhu-Min Chen Tao lian Jun Ma Information Retrieval Laboratory School of Coutputer Science and Technology Shandong University Jinan 250101 China

Inferring semantic types of the entity mentions in a sentence is a necessary yet challenging task. Most of existing methods employ a very coarse-grained type taxonomy, which is too general and not exact enough for many tasks. However, the performances of the methods drop sharply when we extend the type taxonomy to a fine-grained one with several hundreds of types. In this paper, we introduce a hybrid neural network model for type classification of entity mentions with a fine-grained taxonomy. There are four components in our model, namely, the entity mention component, the context component, the relation component, the already known type component, which are used to extract features from the target entity mention, context, relations and already known types of the entity mentions in surrounding context respectively. The learned features by the four components are concatenated and fed into a softmax layer to predict the type distribution. We carried out extensive experiments to evaluate our proposed model. Experimental results demonstrate that our model achieves state-of-the-art performance on the FIGER dataset. Moreover, we extracted larger datasets from Wikipedia and DBpedia. On the larger datasets, our model achieves the comparable performance to the state-of-the-art methods with the coarse-grained type taxonomy, but performs much better than those methods with the fine-grained type taxonomy in terms of micro-F1, macro-F1 and weighted-F1.

关键词： entity mention classification entity mention relation fine-grained taxonomy

Boundedness of Marcinkiewicz integral with rough kernel on Triebel-Lizorkin spaces

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Frontiers of Information Technology & Electronic Engineering 2015年第8期16卷 654-657页

作者： Chun-jie ZHANG Fang-fang ren Yu-huai ZHANG Gui-lian GAO Department of Mathematics Hangzhou Dianzi University

This paper is a continuation of our previous work （Zhang and Chen, 2010b）. Following the same generalsteps of the proof there, we make essential improvement on our previous theorem by recalculating a key inequality. Our result shows that the Marcinkiewicz integral, with a bounded radial function in its kernel, is still bounded on the Triebel-Lizorkin space.

关键词： Marcinkiewicz integral Triebel-Lizorkin spaces

Giant benign phyllodes breast tumour with pulmonary nodule mimicking malignancy:A case report

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World Journal of Clinical Cases 2020年第16期8卷 3591-3600页

作者： Ting Zhang liang Feng Jie lian Wei-Li ren Department of Breast Disease Center People's Hospital of ShangyuShaoxing 312300Zhejiang ProvinceChina Department of Pathology People's Hospital of ShangyuShaoxing 312300Zhejiang ProvinceChina

BACKGROUND Phyllodes tumours(PTs)are fibroepithelial breast tumours,which can be classified as benign,borderline or malignant,according to their histological *** various huge borderline or malignant PTs have been previously described,a benign PT with a pulmonary nodule mimicking malignancy has not yet been *** order that doctors may have a comprehensive understanding of super-giant benign PTs(≥20 cm),we also performed a literature review to summarize the clinical features,differential diagnosis,and treatment of this *** SUMMARY A 42-year-old woman with severe anaemia presented with a rapidly enlarging right breast mass,measuring approximately 30 cm×25 cm×20 cm that was first noticed 1 year previously.A region of skin ulceration and necrosis(20 cm×15 cm)was observed on the lateral side of the *** tomography(CT)of the chest revealed a pulmonary nodule,which initially suggested a diagnosis of *** showed that the boundaries between the pectoralis major and the mass were blurred,which was presumed to be due to tumour ***,two core needle biopsies of the mass showed no evidence of *** these results,the tumour was removed by mastectomy of the right ***,postoperative pathology finally proved the diagnosis of a benign *** 1 year of follow-up,wedge resection of the small pulmonary nodule was performed,and it was confirmed that the lung nodule was actually adenocarcinoma rather than metastatic breast *** patient recovered very well without any postoperative *** This case is unique in that the giant breast mass initially mimicking a malignantclinical presentation was eventually pathologically confirmed to be a benign PT,which misled the diagnosis and complemented the atypical features of benign *** pathological and immunohistochemical results were important in the differential *** addition,total mastectomy should be recommended due to di

关键词： Phyllodes tumour Pulmonary neoplasms Diagnosis Treatment Recurrence Case report