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  • 1
    Publication Date: 2016-09-03
    Description: A new inductive photo-catalytic reactor was obtained by the alternative magnetic field and optical coupling, which was driven by AC supply. In the cylinder reactor, UV-LED lights with the wavelength of 375-380nm were evenly distributed, and the phenol solution was used as simulated wastewater. The effects of initial phenol concentration, pH, TiO 2 , H 2 O 2 , alternative magnetic frequency, current, and reaction time on the phenol degradation were investigated under an imposed alternative magnetic field. The optimized conditions and results were as follows: phenol concentrations of 15mg/L, pH of 7, H 2 O 2 of 15μL, TiO 2 of 0.18g and alternative magnetic frequency of 12 KHz and current of 2A. With these conditions, the phenol degradation ratio reached 47.1% in 1 h reaction time. The new reactor is very promising for the effective treatment of refractory organic pollutants.
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
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  • 2
    Publication Date: 2017-07-22
    Description: Pipeline integrity is significant to safe operation of long-range pipeline. To avoid critical failure of the pipeline, which may lead to great loss of property and life, MFL_PIG is often used to detect the corrosion and leakage of the pipeline. To accurately locate the defects, mileage pulses emitted by the mileage wheel are used to and emit signal to single-chip microcomputer for position. This paper investigates the factors that may affect the precision of mileage wheel, an important part of pipeline corrosion and leakage detector (MFL_PIG), investigate its working principle and present an optimized algorithm for mileage wheel to increase the precision of detection.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 3
    Publication Date: 2017-07-22
    Description: Magnetic sensors used in Above Ground Markers (AGM) to measure the magnetic field signals are one of the main parts of AGM. By collecting the change of magnetic field parameter using magnetic sensors, AGM can record the precise time when MFL_PIG is passing by the AGM. In this paper, the magnetic sensors, such as induced coil and magneto-resistive sensor, are investigated in characteristics and performance of measurement. With advantages of low cost, high resolution and wide range of measurement, the induced coil is adopted in a novel AGM. The traction test, seal ability test and temperature test show that the AGM with induced coil as magnetic sensor works well under extreme condition and reacts to change the magnetic field with high sensibility.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 4
    Publication Date: 2017-03-11
    Description: The mechanical properties and corrosion mechanism of both as-cast and solution-naturally age (T4) treated Mg-1.5Mn-1Ca-xSr alloys were investigated. The results showed that Sr is helpful to decrease grain size and increase the strength. The corrosion process of alloys was mainly determined by the quantity and distribution of second phases. Mg 17 Sr 2 , α-Mn and Ca-Sr phases acted as cathodes accelerated the corrosion of Mg 2 Ca anodic phase and α-Mg matrix. However, continuous distributed Mg 17 Sr 2 was beneficial to resist the happening of localized corrosion because of its barrier effect. T4 treatment could significantly improve the mechanical properties and corrosion resistance of Mg alloys because of the dissolution of Mg 2 Ca phase and the dispersive distribution of Mg 17 Sr 2 and α-Mn phases.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 5
    Publication Date: 2015-12-19
    Description: Numerical investigation was performed on the temperature control of NIF cryogenic target in order to get a temperature uniformity of 0.1mK on the surface of the capsule. Heat transfer process was discussed to find out major factors in the temperature control, tamping gas heat transfer and free convection of the tamping gas was calculated. Spherically symmetric temperature field is required due to energy released from the tritium decay within the capsule, auxiliary heating is set on the hohlraum to compensate the higher heat loss caused by the lower tamping gas thermal resistance on the mid plane. Free convection effect of the tamping gas is reduced by separating the tamping gas with plastic films and independent temperature control of the cooling arm. This research may provide theoretical foundation and reference for temperature control on the cryogenic target.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 6
    Publication Date: 2018-12-20
    Description: This paper discusses a new method for determining the iron content in Chinese fir leaves and roots using a SmartChem200 automatic chemical analyzer. With a pH value of 4-5, Fe 3 + was reduced to Fe 2 + by hydroxylamine hydrochloride, and Fe 2 + and 1,10-phenanthrolinemonohydrate generated an orange complex. The iron content was calculated based on the absorbance measured at a wavelength of 510 nm. The absorbance is directly proportional to the Fe 2 + content within a certain concentration range of Fe 2 +. The absorbance had a good linear relationship with the Fe 2 + content in the range of 0.01 mgL −1 to 5 mgL −1 ; the linear regression equation of the standard curve was Y=0.0632*X-0.00002, and the correlation coefficient was 1.0000. The method is convenient and rapid, and the experimental results were reliable.
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
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  • 7
    Publication Date: 2008-05-16
    Description: Understanding the origins and roles of cardiac progenitor cells is important for elucidating the pathogenesis of congenital and acquired heart diseases. Moreover, manipulation of cardiac myocyte progenitors has potential for cell-based repair strategies for various myocardial disorders. Here we report the identification in mouse of a previously unknown cardiac myocyte lineage that derives from the proepicardial organ. These progenitor cells, which express the T-box transcription factor Tbx18, migrate onto the outer cardiac surface to form the epicardium, and then make a substantial contribution to myocytes in the ventricular septum and the atrial and ventricular walls. Tbx18-expressing cardiac progenitors also give rise to cardiac fibroblasts and coronary smooth muscle cells. The pluripotency of Tbx18 proepicardial cells provides a theoretical framework for applying these progenitors to effect cardiac repair and regeneration.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cai, Chen-Leng -- Martin, Jody C -- Sun, Yunfu -- Cui, Li -- Wang, Lianchun -- Ouyang, Kunfu -- Yang, Lei -- Bu, Lei -- Liang, Xingqun -- Zhang, Xiaoxue -- Stallcup, William B -- Denton, Christopher P -- McCulloch, Andrew -- Chen, Ju -- Evans, Sylvia M -- P41 RR005351/RR/NCRR NIH HHS/ -- T32 HL007444/HL/NHLBI NIH HHS/ -- England -- Nature. 2008 Jul 3;454(7200):104-8. doi: 10.1038/nature06969. Epub 2008 May 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Skaggs School of Pharmacy, University of California, San Diego, La Jolla, California 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18480752" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; *Cell Lineage ; Gene Expression Regulation, Developmental ; Heart/growth & development ; Lac Operon/genetics ; Mice ; Myocardium/*cytology/metabolism ; Myocytes, Cardiac/*cytology/metabolism ; Myocytes, Smooth Muscle/metabolism ; Pericardium/*cytology/*metabolism ; Stem Cells/*cytology/metabolism ; T-Box Domain Proteins/genetics/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2015-10-28
    Description: Epigenetic silencing including histone modifications and DNA methylation is an important tumorigenic mechanism. However, its role in cancer immunopathology and immunotherapy is poorly understood. Using human ovarian cancers as our model, here we show that enhancer of zeste homologue 2 (EZH2)-mediated histone H3 lysine 27 trimethylation (H3K27me3) and DNA methyltransferase 1 (DNMT1)-mediated DNA methylation repress the tumour production of T helper 1 (TH1)-type chemokines CXCL9 and CXCL10, and subsequently determine effector T-cell trafficking to the tumour microenvironment. Treatment with epigenetic modulators removes the repression and increases effector T-cell tumour infiltration, slows down tumour progression, and improves the therapeutic efficacy of programmed death-ligand 1 (PD-L1; also known as B7-H1) checkpoint blockade and adoptive T-cell transfusion in tumour-bearing mice. Moreover, tumour EZH2 and DNMT1 are negatively associated with tumour-infiltrating CD8(+) T cells and patient outcome. Thus, epigenetic silencing of TH1-type chemokines is a novel immune-evasion mechanism of tumours. Selective epigenetic reprogramming alters the T-cell landscape in cancer and may enhance the clinical efficacy of cancer therapy.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4779053/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4779053/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peng, Dongjun -- Kryczek, Ilona -- Nagarsheth, Nisha -- Zhao, Lili -- Wei, Shuang -- Wang, Weimin -- Sun, Yuqing -- Zhao, Ende -- Vatan, Linda -- Szeliga, Wojciech -- Kotarski, Jan -- Tarkowski, Rafal -- Dou, Yali -- Cho, Kathleen -- Hensley-Alford, Sharon -- Munkarah, Adnan -- Liu, Rebecca -- Zou, Weiping -- 5P30CA46592/CA/NCI NIH HHS/ -- CA099985/CA/NCI NIH HHS/ -- CA123088/CA/NCI NIH HHS/ -- CA152470/CA/NCI NIH HHS/ -- CA156685/CA/NCI NIH HHS/ -- CA171306/CA/NCI NIH HHS/ -- CA190176/CA/NCI NIH HHS/ -- CA193136/CA/NCI NIH HHS/ -- R01 CA099985/CA/NCI NIH HHS/ -- R01 CA123088/CA/NCI NIH HHS/ -- R01 CA152470/CA/NCI NIH HHS/ -- R01 CA156685/CA/NCI NIH HHS/ -- R01 CA171306/CA/NCI NIH HHS/ -- R01 CA190176/CA/NCI NIH HHS/ -- R01 CA193136/CA/NCI NIH HHS/ -- England -- Nature. 2015 Nov 12;527(7577):249-53. doi: 10.1038/nature15520. Epub 2015 Oct 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Surgery, University of Michigan School of Medicine, Ann Arbor, Michigan 48109, USA. ; Graduate Program in Immunology, University of Michigan, Ann Arbor, Michigan 48109, USA. ; Department of Biostatistics, University of Michigan School of Medicine, Ann Arbor, Michigan 48109, USA. ; Department of Pathology, University of Michigan School of Medicine, Ann Arbor, Michigan 48109, USA. ; The First Department of Gynecologic Oncology and Gynecology, Medical University in Lublin, Lublin 20-081, Poland. ; The University of Michigan Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan 48109, USA. ; Department of Women's Health Services, Henry Ford Health System, Detroit, Michigan 48202, USA. ; Department of Obstetrics and Gynecology, University of Michigan School of Medicine, Ann Arbor, Michigan 48109, USA. ; Graduate Program in Tumor Biology, University of Michigan, Ann Arbor, Michigan 48109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26503055" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD274/metabolism ; CD8-Positive T-Lymphocytes/cytology/immunology ; Chemokine CXCL10/biosynthesis/genetics/immunology ; Chemokine CXCL9/biosynthesis/genetics/immunology ; Chemokines/biosynthesis/*genetics/immunology ; DNA (Cytosine-5-)-Methyltransferase/antagonists & inhibitors/metabolism ; DNA Methylation/drug effects ; *Epigenesis, Genetic/drug effects ; Female ; *Gene Silencing ; Histones/chemistry/metabolism ; Humans ; *Immunotherapy/methods ; Lymphocytes, Tumor-Infiltrating/immunology ; Lysine/metabolism ; Mice ; Ovarian Neoplasms/enzymology/*immunology/pathology/*therapy ; Polycomb Repressive Complex 2/antagonists & inhibitors/metabolism ; Prognosis ; Th1 Cells/immunology/*metabolism ; Tumor Cells, Cultured ; Tumor Escape/immunology ; Xenograft Model Antitumor Assays
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 9
    Publication Date: 2015-07-16
    Description: Traumatic brain injury (TBI), characterized by acute neurological dysfunction, is one of the best known environmental risk factors for chronic traumatic encephalopathy and Alzheimer's disease, the defining pathologic features of which include tauopathy made of phosphorylated tau protein (P-tau). However, tauopathy has not been detected in the early stages after TBI, and how TBI leads to tauopathy is unknown. Here we find robust cis P-tau pathology after TBI in humans and mice. After TBI in mice and stress in vitro, neurons acutely produce cis P-tau, which disrupts axonal microtubule networks and mitochondrial transport, spreads to other neurons, and leads to apoptosis. This process, which we term 'cistauosis', appears long before other tauopathy. Treating TBI mice with cis antibody blocks cistauosis, prevents tauopathy development and spread, and restores many TBI-related structural and functional sequelae. Thus, cis P-tau is a major early driver of disease after TBI and leads to tauopathy in chronic traumatic encephalopathy and Alzheimer's disease. The cis antibody may be further developed to detect and treat TBI, and prevent progressive neurodegeneration after injury.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4718588/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4718588/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kondo, Asami -- Shahpasand, Koorosh -- Mannix, Rebekah -- Qiu, Jianhua -- Moncaster, Juliet -- Chen, Chun-Hau -- Yao, Yandan -- Lin, Yu-Min -- Driver, Jane A -- Sun, Yan -- Wei, Shuo -- Luo, Man-Li -- Albayram, Onder -- Huang, Pengyu -- Rotenberg, Alexander -- Ryo, Akihide -- Goldstein, Lee E -- Pascual-Leone, Alvaro -- McKee, Ann C -- Meehan, William -- Zhou, Xiao Zhen -- Lu, Kun Ping -- P30 AG013846/AG/NIA NIH HHS/ -- P30AG13846/AG/NIA NIH HHS/ -- R01AG029385/AG/NIA NIH HHS/ -- R01AG046319/AG/NIA NIH HHS/ -- R01CA167677/CA/NCI NIH HHS/ -- R01HL111430/HL/NHLBI NIH HHS/ -- S10RR017927/RR/NCRR NIH HHS/ -- T32HD040128/HD/NICHD NIH HHS/ -- U01 NS086659/NS/NINDS NIH HHS/ -- U01NS086659-01/NS/NINDS NIH HHS/ -- England -- Nature. 2015 Jul 23;523(7561):431-6. doi: 10.1038/nature14658. Epub 2015 Jul 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Division of Translational Therapeutics, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA [2] Cancer Research Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA. ; Division of Emergency Medicine, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts 02115, USA. ; Alzheimer's Disease Center, CTE Program, Boston University School of Medicine, Boston, Massachusetts 02118, USA. ; 1] Division of Translational Therapeutics, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA [2] Geriatric Research Education and Clinical Center, VA Boston Healthcare System, Harvard Medical School, Boston, Massachusetts 02130, USA. ; Department of Neurology, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts 02115, USA. ; Department of Microbiology, Yokohama City University School of Medicine, Yokohama 236-0004, Japan. ; Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA. ; Micheli Center for Sports Injury Prevention, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26176913" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/complications/prevention & control ; Animals ; Antibodies, Monoclonal/*immunology/*pharmacology/therapeutic use ; Antibody Affinity ; Axons/metabolism/pathology ; Brain/metabolism/pathology ; Brain Injuries/complications/metabolism/*pathology/*prevention & control ; Disease Models, Animal ; Epitopes/chemistry/immunology ; Female ; Humans ; Male ; Mice ; Phosphoproteins/antagonists & inhibitors/biosynthesis/immunology/toxicity ; Stress, Physiological ; Tauopathies/complications/metabolism/pathology/*prevention & control ; tau Proteins/*antagonists & ; inhibitors/biosynthesis/*chemistry/immunology/toxicity
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 2018-10-31
    Description: The paper presented two kinds of typical topology structures of hybrid-DC transmission system along with the principle of the voltage source converter for the flexible DC transmission system. After that, the paper found that the flexibility of DC voltage in the start-up process should be restricted to an extent due to the unidirectional mobility of the HVDC transmission system. Therefore, the traditional start-up control method can not be directly applied in the starting process of the hybrid-DC transmission system. To solve this problem, the paper proposed a starting control strategy based on DC line polarity switching, which is reliable for hybrid HVDC transmission. Finally, the effect of the control strategy is verified by simulation.
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
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