检索结果-南通市图书馆

mAThEmATICAL AND PhYsICAL mODelING OF INTERFACIALPhENOmENA IN CONTINOUs CAsTING mOULD WITh ARGONINJECTION ThROUGh sUBmERGED ENTRV NOZZLE

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta metallurgica sinica(English Letters) 2000年第5期13卷 1079-1086页

作者： h. Lei, m. Y. Zhu and J.C. he (school of materials and metallurgy, Northeastern University, shenyang 110006, China) sch. of mat. and metall. Northeastern Univ. Shenyang 110006 China

The study on the fluid flow, meniscus oscillation, slag entrapment in continuous casting mould was conducted mathematically and experimentally. The results show that the injection of argon into submerged nozzle enhances the meniscus oscillation, thus increases the probability of slag entrapment, and the critical argon blowing flow rate, which will give rise to slag entrapment, is around 10l/min. The trajectory of bubble is affected by the bubble diameter and the molten steel flow, and the bubble diameter is dominant. The bubble with diameter 1.4mm floats fastest with 0.47m/s terminal velocity.

关键词： continuous casting mould argon injection meniscus oscillation slag entrapment mathematical and physical model

Parental Occupational Exposure and Risk of Acute Leukemia in Children: A Tunisian Population-Based Case-Control study

在线全文

学校读者我要写书评

暂无评论

International Journal of Clinical medicine 2016年第3期7卷 193-203页

作者： h. Kalboussi Y. Ben Youssef I. Bougmiza F. Aloui A. Aloui W. Boughattas m. maoua A. Brahem s. Chatti O. el maalel F. Debbabi A. Khlif N. mrizak Occupational medicine and Occupational Pathologies Department Farhat Hached Teaching Hospital Sousse Tunisia hematology Department Farhat Hached Teaching Hospital Sousse Tunisia Community medicine Department Faculty of Medicine of Sousse University of Sousse Sousse Tunisia

Background: In recent decades, the incidence of children’s hematological malignancies has been increasing worldwide including Tunisia. Their severity is reflected in the importance of the medical, social and economic impact. This increase remains fully unexplained, and the involvement of genetic, environmental and occupational factors is strongly suspected. materials and methods: Our study was a cross-sectional survey of the type case-control conducted in the University hospital of Farhat hached of sousse during the period ranging between 1 July 2011 and 30 June 2012, and which included children with acute leukemia compared to children unharmed by neoplastic disease. Cases and controls were matched by age and gender. Our objective was to describe the socio-occupational characteristics of the parents of children with acute leukemia and to identify potential occupational factors implicated in the genesis of acute leukemia. Results: The number of acute leukemia cases in the hematology service and day hospital of the University hospital of Farhat hached during the study period was 66 cases divided into in 40 boys and 26 girls with a sex ratio of 1.53. Our cases and controls were matched by age and gender. The risk of incidence of leukemia in children from smoking fathers was higher (p = 0.02, OR = 2.24, IC = [1.11 - 4.52]). The risk of incidence of leukemia in children from alcoholic fathers was higher with p = 0.009, OR = 3.9;CI = [1.33 - 11.39]. After adjusting different variables, the difference persisted significantly with pa = 0.03 and ORa = 3.5, ICa = [1.09 - 11.6]. 25.7% of cases had a family history of blood disease and neoplasia, whereas no control presented that. The difference was statistically significant (p = 0.006, OR = 1.46, IC = [1.38 - 1.56]). The parental occupational exposures associated to the occurrence of acute leukemia in children were pesticides with a statistically significant difference (p = 0.03, OR = 2.94, IC = [1.06 - 8.13]). This difference

关键词： Occupational medicine hematology Leukemia Children Case Control survey

Quranic Verse No. 8 of surat Al-Jumu’ah Leads us to Describe Cancer and Determine Its True Cause (Part-III)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CellBio 2018年第2期7卷 35-49页

作者： mahmoud saad mohamed el-Khodary Department of Veterinary medicine Zagazig University Zagazig Egypt Department of Fish Diseases Suez Canal University Ismailia Egypt General Organization for Export and Import Control Suez Egypt

Therapeutic strategies for destroying cancer cells by making its death programs run again. The normal cell passes through several stages (Accumulation stage, Detoxification stage, Formation of free radical stage and Activation of nuclear factor kappa B stage and the shutting down of programs of cell death stage) to become a cancerous cell. The success of the therapeutic strategy to treat cancer depends on making either one or both programs of cell death run again. shutting down one stage completely will be sufficient to stop the transformation of the natural cell into a cancerous cell, which eliminates the production of hydrogen peroxide, thus the activity of the NF-Kb will be inhibited. however, shutting down all stages is the most comprehensive therapeutic strategy and guarantees treatment success.

关键词： Cancer Therapeutic strategy Accumulation Detoxification Enzymes Free Radicals Antioxidants h2O2 Glutathione NF-Kb sulforaphane Flavonoid Cur Cumin

synthesis of Flower-Like Nanoparticles of Anatase Titania by microwave solvo-hydrothermal method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta metallurgica sinica(English Letters) 2013年第6期26卷 742-746页

作者： s.mahmoudi s.Boudjadar Ceramics Laboratory Department of PhysicsUniversity of Constantine

Anatase titania nanoparticles with an average size of about 14 nm were synthesized by microwave solvothermal method from TiCI4 and ethanol as a precursor and solvent respectively. The shapes of as prepared samples were modified by microwave hydrothermal treatment in strongly alkaline medium at 100℃ for 2 h, the agglomerate particles can be converted to the nanorods then to flower-like sphere. The structure, morphology and optical properties of as-prepared powders were investigated by X-ray diffraction, scanning electron microscopy and UV- vis absorption spectroscopy, the quality of the samples was examined by IR absorption spectroscopy and room temperature photoluminescence （PL）. The results showed that the synthesized Ti02 revealed the formation of the nanorods and the flower-like shape of titania after post treatment in 5 mol/L and 10 mol/L NaOh solution, respectively. IR absorption spectra showed that the as-prepared TiO2 nanocrystals were highly pure and strongly surface hydrated, The photoluminescence measurement showed that five main emission peaks appeared in UV, violet, blue and green regions.

关键词： Titanium dioxide microwave hydrothermal Alkaline medium Flower-like Photoluminescence

mhC class Ⅰ-independent activation of virtual memory CD8 T cells induced by chemotherapeutic agent-treated cancer cells

在线全文

学校读者我要写书评

暂无评论

Cellular & molecular Immunology 2021年第3期18卷 723-734页

作者： Xiaoguang Wang Brittany C.Waschke Rachel A.Woolaver samantha m.Y.Chen Zhangguo Chen Jing h.Wang Department of Immunology and microbiology University of ColoradoAnschutz Medical CampusAuroraCO 80045USA

Cancer cells can evade immune recognition by losing major histocompatibility complex(mhC)class Ⅰ.hence,mhC class Ⅰ-negative cancers represent the most challenging cancers to *** drugs not only directly kill tumors but also modulate the tumor immune microenvironment however,it remains unknown whether chemotherapy-treated cancer cells can activate CD8 T cells independent of tumor-derived mhC class Ⅰ and whether such mhC class Ⅰ-independent CD8 T-cell activation can be exploited for cancer ***,we showed that chemotherapy-treated cancer cells directly activated CD8 T cells in an mhC class Ⅰ-independent manner and that these activated CD8 T cells exhibit virtual memory(Vm)***,in vivo chemotherapeutic treatment preferentially increased tumor-infiltrating Vm CD8 T ***,mhC class Ⅰ-independent activation of CD8 T cells requires cell-cell contact and activation of the PI3K *** CD8 T cells contribute to a superior therapeutic effect on mhC class Ⅰ-deficient *** humanized mouse models or primary human CD8 T cells,we also demonstrated that chemotherapy-treated human lymphomas activated Vm CD8 T cells independent of tumor-derived mhC class Ⅰ.In conclusion,CD8 T cells can be directly activated in an mhC class Ⅰ-independent manner by chemotherapy-treated cancers,and these activated CD8 T cells may be exploited for developing new strategies to treat mhC class Ⅰ-deficient cancers.

关键词： DNA-damaging agents B-cell lymphomas virtual memory CD8 T cells cancer immunotherapy mhC classⅠ

The impact of emergency department length of stay on the outcomes of trauma patients requiring hospitalization: a retrospective observational study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Emergency medicine 2023年第2期14卷 96-105页

作者： Ahmed Faidh Ramzee Ayman el-menyar mohammad Asim Ahad Kanbar Khalid Ahmed Bahaa Daoud saji mathradikkal Ahmad Kloub hassan Al-Thani sandro Rizoli Trauma surgery section Hamad General Hospital(HGH)Doha P.O Box 3050Qatar Clinical Research Trauma&Vascular Surgery SectionHGHDoha P.O Box 3050Qatar Clinical medicine Weill Cornell Medical CollegeDoha P.O Box 3050Qatar

BACKGROUND: We aimed to explore the impact of the emergency department length of stay(EDLOs) on the outcome of trauma ***: A retrospective study was conducted on all trauma patients requiring hospitalization between 2015 and 2019. Patients were categorized into 4 groups based on the EDLOs(h, 4–12 h,12–24 h, and >24 h). Data were analyzed using Chi-square test(categorical variables), student’s t-test(continuous variables), correlation coefficient, analysis of variance and multivariate logistic regression analysis for identifying predictors of short EDLOs and hospital ***: The study involved 7,026 patients with a mean age of 32.1±15.6 years. Onefifth of patients had a short EDLOs(h) and had higher level trauma team T1 activation(TTA-1), higher Injury severity score(Iss), higher shock index(sI), and more head injuries than the other groups(P=0.001). Patients with an EDLOs >24 h were older(P=0.001) and had more comorbidities(P=0.001) and fewer deaths(P=0.001). multivariate regression analysis showed that the predictors of short EDLOs were female gender, GCs, sI, hemoglobin level, Iss, and blood transfusion. The predictors of mortality were TTA-1(odds ratio [OR]=4.081, 95%CI: 2.364–7.045), head injury(OR=3.920, 95%CI: 2.413–6.368), blood transfusion(OR=2.773, 95%CI: 1.668–4.609), sI(OR=2.132, 95%CI: 1.364–3.332), Iss(OR=1.077, 95%CI: 1.057–1.096), and age(OR=1.040, 95%CI: 1.026–1.054). CONCLUsIONs: Patients with shorter EDLOs had different baseline characteristics and hospital outcomes compared with patients with longer EDLOs. Patients with prolonged EDLOs had better outcomes;however, the burden of prolonged boarding in the ED needs further elaboration.

关键词： Emergency department Length of stay Trauma management Outcomes Trauma activation criteria

strength of Cement mortar solidified soil and Prediction

在线全文

学校读者我要写书评

暂无评论

Strength of Cement Mortar Solidified Soil and Prediction

COVID-19后影像学肺部后遗症及与临床和功能性肺部评估的相关性：一项前瞻性队列研究

作者： m Wang J J Yang m Q Zhao h Liu s C Li Key Laboratory of marine Environment and Ecology Ministry of Education College of Environmental science and engineering Ocean University of China

strength is an important index to evaluate the solidification effect of cement soil and engineering design and construction *** unconfined compressive strength test of cement mortar solidified soil was carried *** results showed that the strength growth rate of cement mortar solidified soil increased linearly with the sand content,which was the maximum at 7 d,and tended to be stable after 14 *** strength of solidified soil increased with age,and the initial growth rate was relatively *** with cement soil,the coefficient of deformation of cement mortar solidified soil did not slow down obviously in the later *** cement mortar solidified soil as cement soil for strength calculation,the strength prediction equation of cement solidified soft soil at full age could well reflect the strength growth rule of cement mortar solidified soil.

关键词： Cement mortar solidified soil unconfined compressive strength cement-water ratio strength prediction

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

国际医学放射学杂志 2024年第2期 254-254页

作者： s.soliman h.soliman m.Crézél P.Y.Brillet D.montani L.savale 朱婉秋

摘要目的 COVID-19是否会导致长期肺部后遗症尚不清楚。研究旨在评估COVID-19住院病人持续性放射学肺纤维化的患病率。方法该项前瞻性单中心研究收集了2020年

关键词：

morphological Changes in the Gills of Tilapia Fed sterilized and Nonsterilized sludge

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Biomedical and Environmental sciences 1989年第2期2卷 81-91页

作者： W.K.LIU m.h.WONG Y.h.ChEUNG Department of Anatomy The Chinese University of Hong KongShatinN.T.Hong Kong Department of Biology Hong Kong Baptist College224 Waterloo RoadKowloonHong Kong

The effects of digested sludge on the ultrastructure of gills of sarotherodon mossambicus were *** of digested sludge were collected from the shatin sewage Treatment Plant in hong Kong *** were (1)sun-dried(Ns)or(2)sterilized in an autoclave(ss).They were then used as supplementary fish feed to cultivate the freshwater tilapia,***,for 50 days under laboratory *** ss at low dosage(25%)had the lowest toxicity among different treatments.A swelling of lamellar epithelium,the enlargement of the subepitlaelial space,the collapse of capillaries,and the infiltration of polymorphonuclear cells in the lamellae offish gills were common to fish fed 50 to 100% Ns and *** thickening of the basal lamina in the gill lamellae is a common feature found in the sludge-treated fish.1989 Academic ***.

关键词： morphological Changes in the Gills of Tilapia Fed sterilized and Nonsterilized sludge