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改变世界的一张照片

摄影之友 2024年第6期 64-71页

作者：健一黄功吾(图) 不详

在历史的长河中,有些瞬间是如此强烈,以至于它们永远地刻录在我们的记忆中。对于许多美国人来说,越南战争就是这样一个时刻,而黄功吾(Nick ut)所拍摄的一张照片则成了那个时代的象征。

关键词：越南战争刻录照片

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战地摄影:见证暴行,传承反战愿望

摄影之友 2024年第6期 62-63页

作者：周仰黄功吾(图) 英国伯明翰城市大学艺术学院英国威斯敏斯特大学不详

在2024年世界新闻摄影大赛(荷赛)中,巴以冲突和俄乌战争的摄影作品再次引起了人们对战争暴行的关注。然而,这些令人楸心的战地影像似乎未能引起我们足够的关注。与20世纪战地摄影师,如罗伯特·卡帕、唐·麦卡林和詹姆斯·纳切威等的作... 详细信息

在2024年世界新闻摄影大赛(荷赛)中,巴以冲突和俄乌战争的摄影作品再次引起了人们对战争暴行的关注。然而,这些令人楸心的战地影像似乎未能引起我们足够的关注。与20世纪战地摄影师,如罗伯特·卡帕、唐·麦卡林和詹姆斯·纳切威等的作品相比,如今的观众似乎更难为某一幅战地影像停留。这让我们不禁反思,战地摄影在当今社会的地位和影响力是否已经发生了变化?而传奇摄影师黄功吾的故事则让我们重新审视了战地摄影的意义和价值,以及它对历史的见证和反战愿望的传承。

关键词：摄影大赛摄影作品战地摄影巴以冲突历史的见证反战摄影师罗伯特·卡帕

Optimization of Electrical Conductivity of SA-graphene Nanocomposites Using Response Surface Methodology

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Chemical Research in Chinese Universities 2022年第2期38卷 596-602页

作者： HakanŞAHAL Gülben TORĞut Erdal CANPOLAT Vocational School of Tunceli Department of Food ProcessingMunzur UniversityTunceli 62000Turkey Vocational School of Tunceli Department of Chemistry and Chemical ProcessesMunzur UniversityTunceli 62000Turkey Department of Elementary Science Education Faculty of EducationFirat UniversityElazig 23119Turkey

Synthesis and characterization of 4-{(E)-[(5-bromo-2-hydroxyphenyl)methylidene]amino}-N-carbamimidoylbenzene-1-sulfonamide(SA) and its composites with graphene(SA-GF) were performed. Compound SA and SA-GF were characterized by FTIR and 1H NMR. The GF dispersion in the composites was analyzed by means of scanning electron microscopy(SEM) for morphology. Thermal properties of SA and nanocomposites were investigated using differential thermal analysis(DTA) and thermogravimetric analysis(TGA). The optimum electrical conductivity of the new sulfonamide-based Schiff base was determined to be 1.78×10–5 S/cm at a frequency of 9923 Hz, an applied voltage of –19 V, a mass fraction of 9.38% for graphene loading using a central composite design in the response surface methodology. The significance of the selected parameters(frequency, voltage and GF amount) in the model was determined by the analysis of variance(ANOVA). The results showed that frequency and graphene loading represent important model terms and have considerable effects on the conductivity of SA.

关键词： Schiff base Sulfonamide Graphene Conductivity Nanocomposite

Inhibition of cell proliferation and migration by Oroxylum indicum extracts on breast cancer cells via Rac1 modulation

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Journal of Pharmaceutical Analysis 2020年第2期10卷 187-193页

作者： Benjaporn Buranrat Sirintra Noiwetch Tippaporn Suksar Aphimook Ta-ut MD Program Faculty of MedicineMahasarakham UniversityMuang DistrictMaha Sarakham44000Thailand Applied Thai Traditional Medicine Program Faculty of MedicineMahasarakham UniversityMuang DistrictMaha Sarakham44000Thailand

In this study,we investigated how Oroxylum indicum leaf and fruit extracts affect the viability and migration of MCF-7 breast cancer cells and the mechanisms of action responsible for these ***-7 cells treated with the extracts were examined using the sulforhodamine B,colony formation and caspase 3 activity assays,and by Western *** extracts were found to inhibit MCF-7 cell growth in a concentration-and time-dependent manner,with 48 h IC50 values of 57.02±2.85μg/mL and 131.3±19.2μg/mL for leaf and fruit extracts,***,the *** leaf extract caused a reduction in MCF-7 cell viability,induction of MCF-7 cell apoptosis and ROS formation,and an increase in caspase 3 ***,the two extracts inhibited MCF-7 cell migration and reduced both MMP 9 and ICamP1 gene expression and MMP9 protein ***,*** extracts greatly reduced expression of the cell cycle regulatory protein Rac1 in the mevalonate *** summary,*** leaf and fruit extracts reduce breast cancer cell growth,cell viability and cell *** constituents could,therefore,be useful for augmenting the activity of chemotherapeutic drugs employed to treat breast cancer.

关键词： Oroxylum indicum Reactive oxygen species(ROS) Migration Cell viability Matrix metalloproteinase(MMP) Apoptosis

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ut斯达康基于GEPON的业务解决方案

电信科学 2006年第6期22卷 91-92页

作者： ut斯达康公司 ut斯达康公司

1基于GEPON的业务平台的整体架构

关键词： ut斯达康业务平台以太网接口最终用户宽带数据接入接入系统视频业务 IP网络语音业务业务发展

Microfabrication of Bubbular Cavities in PDMS for Cell Sorting and Microcell Culture Applications

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Journal of Bionic Engineering 2008年第4期5卷 308-316页

作者： ut-Binh T. Giang Michael R. King Lisa A. DeLouise Department of Biomedical Engineering University of Rochester Department of Biomedical Engineering Cornell University Department of Dermatology University of Rochester Medical Center

We describe a novel technique, low surface energy Gas Expansion Molding （GEM）, to fabricate microbubble arrays in polydimethylsiloxane （PDMS） which are incorporated into parallel plate flow chambers and tested in cell sorting and microcell cutture applications. This architecture confers several operational advantages that distinguish this technology approach from currently used methods. Herein we describe the GEM process and the parameters that are used to control microbubble formation and a Vacuum-Assisted Coating （VAC） process developed to selectively and spatially alter the PDMS surface chemistry in the wells and on the microchannel surface. We describe results from microflow image visualization studies conducted to investigate fluid streams above and within microbubble wells and conclude with a discussion of cell culture studies in PDMS.

关键词： polydimethylsiloxane microfabrication cell culture cell sorting molding

Effect of liver regeneration after partial hepatectomy and ischemia-reperfusion on expression of growth factor receptors

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World Journal of Gastroenterology 2006年第24期12卷 3835-3840页

作者： P Baier G Wolf-Vorbeck S Hempel ut Hopt E von Dobschuetz Department of General and Visceral Surgery Albert-Ludwigs-University FreiburgGermany

AIM： To investigate the effects of experimental partial hepatectomy and normothermic ischemia-reperfusion damage on the time course of the expression of four different growth factor receptors in liver regeneration. This is relevant due to the potential therapeutic use of growth factors in stimulating liver regeneration. METHODS： For partial hepatectomy （PH） 80% of the liver mass was resected in Sprague Dawley rats. Ischemia and reperfusion （I/R） were induced by occlusion of the portal vein and the hepatic artery for 15 min. The epidermal growth factor receptor, hepatic growth factor receptor, fibroblast growth factor receptor and tumour necrosis factor receptor-1 were analysed by immunohistochemistry up to 72 h after injury. Quantitative RT-PCR was performed at the time point of minimal receptor expression （24 h）. RESULTS： In immunohistochemistry, EGFR, HGFR, FGFR and TNFR1 showed biphasic kinetics after partial hepatectomy with a peak up to 12 h, a nadir after 24 h and another weak increase up to 72 h. During liver regeneration, after ischemia and reperfusion, the receptor expression was lower; the nadir at 24 h after reperfusion was the same. To evaluate whether this nadir was caused by a lack of mRNA transcription, or due to a posttranslational regulation, RT-PCR was performed at 24 h and compared to resting liver. In every probe there was specific mRNA for the receptors. EGFR, FGFR and TNFR1 mRNA expression was equal or lower than in resting liver, HGFR expression after I/R was stronger than in the control. CONCLUSION： At least partially due to a post-transcriptional process, there is a nadir in the expression of the analysed receptors 24 h after liver injury. Therefore, a therapeutic use of growth factors to stimulate liverregeneration 24 h after the damage might be not successful.

关键词： Partial hepatectomy Liver ischemia Growthfactor receptors