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Transition metal oxides as hole-transporting materials in organic semiconductor and hybrid perovsk.te based solar cells

2008年

作者： wallace Michael.

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Science China Chemistry 2017年第4期60卷 472-489页

作者： Pingli Qin Qin He Dan Ouyang Guojia Fang wallace C.H. Choy Gang Li Department of Electronic and Information Engineering The Hong Kong Polytechnic University Hong Hum Kowloon Hong Kong SAR China School of Science Wuhan Institute of Technology Wuhan 430073 China College of Post and Telecommunications Wuhan Institute of Technology Wuhan 430073 China k.y Laboratory of Artificial Micro- and Nano-struetures of the Ministry of Education School of Physics and Technology Wuhan University Wuhan 430072 China Department of Electrical and Electronic Engineering The University of Hong Kong Hong Kong SAR China

Organic polymer solar cells （OSCs） and organic-inorganic hybrid perovsk.te solar cells （PSCs） have achieved notable progress over the past several years. A central topic in these fields is exploring electronically efficient, stable and effective hole-transporting layer （HTL） materials. The goal is to enhance hole-collection ability, reduce charge recombination, increase built-in voltage, and hence improve the performance as well as the device stability. Transition metal oxides （TMOs） semiconductors such as NiOx, CuOx, CrOx, MoOx, WO3, and V2O5, have been widely used as HTLs in OSCs. These TMOs are naturally adopted into PSC as HTLs and shows their importance. There are similarities, and also differences in applying TMOs in these two types of main solution processed solar cells. This concise review is on the recent developments of transition metal oxide HTL in OSCs and PSCs. The paper starts from the discussion of the cation valence and electronic structure of the transition metal oxide materials, followed by analyzing the structure-property relationships of these HTLs, which we attempt to give a systematic introduction about the influences of their cation valence, electronic structure, work.ftmction and film property on device performance.

关键词： hole-transporting layer transition metal oxide perovsk.te solar cell organic solar cell

INTERACTION BETWEEN ATMOSPHERE AND OCEAN AND TELECONNECTION IN THE ATLANTIC DURING THE COLD SEASON

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Acta meteorologica Sinica 1992年第1期6卷 38-46页

作者：蒋全荣 J.M.wallace Department of Atmospheric Sciences Nanjing UniversityNanjing Department of Atmospheric Sciences University of WashingtonU.S.A.

In this paper,the WA teleconnection pattern of SST in the Atlantic during the cold season is *** results show the WA pattern of atmosphere is link.d to the SST pattern and relative higher frequencies account for most of the WA *** link.d pair of atmosphere and ocean patterns might be mutually supportive and exhibit“quasi-annual cycle”.The possible explanation for the polarity reversal of WA pattern is also discussed.

关键词： interaction WA teleconnection pattern phase relation

Color-coded perfluorocarbon nanodroplets for multiplexed ultrasound and photoacoustic imaging

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Nano Research 2019年第4期12卷 741-747页

作者： Daniela Y. Santiesteban k.istina A. Hallam Steven k. Yarmosk. Stanislav Y. Emelianov wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA School of Electrical & Computer Engineering Georgia Institute of Technology Atlanta GA 30332 USA

Laser-activated perfluorocarb on n anodroplets are an emerging class of phase-cha nge, dual-c ontrast age nts that can be utilized in ultraso und and photoacoustic imaging. Through the ability to differe ntiate subpopulations of nano droplets via laser activatio n at differe nt wavelengths of n ear-infrared light, optically-triggered color-coded perfluorocarb on nano droplets prese nt themselves as an attractive tool for multiplexed ultrasound and photoacoustic imaging. In particular, laser-activated droplets can be used to provide quantitative spatiotemporal information regarding distinct biological targets, allowing for their potential use in a wide range of diagnostic and therapeutic applications. In the work.prese nted, laser-activated color-coded perfluorocarb on nan odroplets are syn thesized to selectively resp ond to laser irradiati on at corresp on ding wavele ngths. The dyn amic ultraso und and photoacoustic signals produced by laser-activated perfluorocarbon nano droplets are evaluated in situ prior to implementation in a murine model. In vivo, these particles are used to distinguish unique particle traffick.ng mechanisms and are show n to provide ultraso und and photoacoustic contrast for up to 72 hours within lymphatics. Overall, the con ducted studies show that laser-activated color-coded perfluorocarbo n nano droplets are a promising agent for multiplexed ultraso und and photoacoustic imaging.

关键词： multiplexed imaging perfluorocarbon nanodroplets photoacoustic imaging ultrasound imaging molecular targets

Immunopathology of inflammatory bowel disease

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World Journal of Gastroenterology 2014年第1期20卷 6-21页

作者： k.ri L wallace Li-Bo Zheng Yoshitak. k.nazawa David Q Shih F Widjaja Foundation Inflammatory Bowel and Immunobiology Research InstituteCedars-Sinai Medical CenterLos Angeles CA 90048United States Department of Gastroenterology The Second Hospital of Hebei Medical University

Inflammatory bowel disease (IBD) results from a complex series of interactions between susceptibility genes, the environment, and the immune system. The host microbiome, as well as viruses and fungi, play important roles in the development of IBD either by causing inflammation directly or indirectly through an altered immune system. New technologies have allowed researchers to be able to quantify the various components of the microbiome, which will allow for future developments in the etiology of IBD. Various components of the mucosal immune system are implicated in the pathogenesis of IBD and include intestinal epithelial cells, innate lymphoid cells, cells of the innate (macrophages/monocytes, neutrophils, and dendritic cells) and adaptive (T-cells and B-cells) immune system, and their secreted mediators (cytok.nes and chemok.nes). Either a mucosal susceptibility or defect in sampling of gut luminal antigen, possibly through the process of autophagy, leads to activation of innate immune response that may be mediated by enhanced toll-lik. receptor activity. The antigen presenting cells then mediate the differentiation of naïve T-cells into effector T helper (Th) cells, including Th1, Th2, and Th17, which alter gut homeostasis and lead to IBD. In this review, the effects of these components in the immunopathogenesis of IBD will be discussed.

关键词： Inflammatory bowel disease, Crohn’ s disease, Ulcerative colitis, Microbiome, Autophagy, T helper 17, Innate immune system, Adaptive immune system, Innate lymphoid cells, TL1A

Software for automated classification of probe-based confocal laser endomicroscopy videos of colorectal polyps

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World Journal of Gastroenterology 2012年第39期18卷 5560-5569页

作者： Barbara André Tom Vercauteren Anna M Buchner Murli k.ishna Nicholas Ayache Michael B wallace Image Computing Group Mauna Kea Technologies75010 ParisFrance Asclepios Research Team The National Institute for Research in Computer Science and Control Sophia Antipolis06902 Sophia AntipolisFrance Division of Gastroenterology Hospital of theUniversity of PennsylvaniaPhiladelphiaPA 19104United States Laboratory Medicine and Pathology Mayo Clinic Hospital in JacksonvilleJacksonvilleFL 3224United States Department of Gastroenterology and Hepatology Mayo Clinic Hospital in JacksonvilleJacksonvilleFL 3224United States

AIM:To support probe-based confocal laser endomi-croscopy (pCLE) diagnosis by designing software for the automated classification of colonic polyps. METHODS:Intravenous fluorescein pCLE imaging of colorectal lesions was performed on patients under-going screening and surveillance colonoscopies, followed by polypectomies. All resected specimens were reviewed by a reference gastrointestinal pathologist blinded to pCLE information. Histopathology was used as the criterion standard for the differentiation between neoplastic and non-neoplastic lesions. The pCLE video sequences, recorded for each polyp, were analyzed off-line by 2 expert endoscopists who were blinded to the endoscopic characteristics and histopathology. These pCLE videos, along with their histopathology diagnosis, were used to train the automated classification software which is a content-based image retrieval technique followed by k.nearest neighbor classification. The performance of the off-line diagnosis of pCLE videos established by the 2 expert endoscopists was compared with that of automated pCLE software classification. All evaluations were performed using leave-one-patient- out cross-validation to avoid bias. RESULTS:Colorectal lesions (135) were imaged in 71 patients. Based on histopathology, 93 of these 135 lesions were neoplastic and 42 were non-neoplastic. The study found no statistical significance for the difference between the performance of automated pCLE software classification (accuracy 89.6%, sensitivity 92.5%, specificity 83.3%, using leave-one-patient-out cross-validation) and the performance of the off-line diagnosis of pCLE videos established by the 2 expert endoscopists (accuracy 89.6%, sensitivity 91.4%, specificity 85.7%). There was very low power (< 6%) to detect the observed differences. The 95% confidence intervals for equivalence testing were:-0.073 to 0.073 for accuracy, -0.068 to 0.089 for sensitivity and -0.18 to 0.13 for specificity. The classification software proposed i

关键词： Colorectal neoplasia Computer-aided diag-nosis Content-based image retrieval Nearest neigh-bor classification software Probe-based confocal laserendomicroscopy

A Distributed Optical Fiber Chemical Sensor System

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光电工程 1998年第6期 81-85页

作者： Yang Yatao,P.A.wallace,M.Campbell (Glasgow Caledonian University,Glasgow,U.k.)

ＩｎｔｒｏｄｕｃｔｉｏｎＯｐｔｉｃａｌｆｉｂｅｒｔｅｃｈｎｏｌｏｇｙｐｒｅｓｅｎｔｓｍａｎｙａｔｒａｃｔｉｖｅｐｏｓｉｂｉｌｉｔｉｅｓｉｎｔｈｅａｒｅａｏｆｃｈｅｍｉｃａｌｓｅｎｓｉｎｇ．Ｔｈｅｕｓｅｏｆｏｐｔｉｃａ... 详细信息

ＩｎｔｒｏｄｕｃｔｉｏｎＯｐｔｉｃａｌｆｉｂｅｒｔｅｃｈｎｏｌｏｇｙｐｒｅｓｅｎｔｓｍａｎｙａｔｒａｃｔｉｖｅｐｏｓｉｂｉｌｉｔｉｅｓｉｎｔｈｅａｒｅａｏｆｃｈｅｍｉｃａｌｓｅｎｓｉｎｇ．Ｔｈｅｕｓｅｏｆｏｐｔｉｃａｌｆｉｂｅｒａｌｏｗｓｓｉｇｎａｌ...

关键词： Optical fiber sensors Chemical sensors.

Progress and Challenges for Live-cell Imaging of Genomic Loci Using CRISPR-based Platforms

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Genomics, Proteomics & Bioinformatics 2019年第2期17卷 119-128页

作者： Xiaotian Wu Shiqi Mao Yachen Ying Christopher J.k.ueger Antony k. Chen Department of Biomedical Engineering College of Engineering Peking University Beijing 100871 China School of Life Sciences Peking University Beijing 100871 China wallace H Coulter Department of Biomedical Engineering Georgia Institute of Technology Atlanta GA 30332 USA

Chromatin conformation,localization,and dynamics are crucial regulators of cellular behaviors. Although fluorescence in situ hybridization-based techniques have been widely utilized for investigating chromatin architectures in healthy and diseased states,the requirement for cell fix-ation precludes the comprehensive dynamic analysis necessary to fully understand chromatin activ-ities. This has spurred the development and application of a variety of imaging methodologies for visualizing single chromosomal loci in the native cellular context. In this review,we describe currently-available approaches for imaging single genomic loci in cells,with special focus on clus-tered regularly interspaced short palindromic repeats (CRISPR)-based imaging approaches. In addition,we discuss some of the challenges that limit the application of CRISPR-based genomic imaging approaches,and potential solutions to address these challenges. We anticipate that,with continued refinement of CRISPR-based imaging techniques,significant understanding can be gained to help decipher chromatin activities and their relevance to cellular physiology and pathogenesis.

关键词： CRISPR Cas9 dCas9 Genomic imaging sgRNA

Multiple effects of grape seed polyphenolics to prevent metabolic diseases

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Frontiers of Agricultural Science and Engineering 2018年第3期5卷 351-361页

作者： Torey ARVIk.Hyunsook.k.M James SEIBER wallace YOk.YAMA Sonomaceuticals/WholeVine Product LLC Santa RosaCA 95403USA Hanyang University Seoul 04763Korea Department of Food Science University of CaliforniaDavisCA 95616USA United States Department of Agriculture(USDA) Agricultural Research Service(ARS)Western Regional Research CenterAlbanyCA 94710USA

Obesity is increasing in developing *** studies show a relationship between affluence and obesity. Changing food intak. patterns with affluence such as preference for foods with less astringent polyphenolic compounds and dietary fibers may increase risk.of metabolic dysfunctions due to caloric *** models of obesity consistently show that grape seed procyanidins prevent increases in body and abdominal adipose weight gain, plasma cholesterol, liver weight gain and inflammation in animals on high fat diets. The mechanisms are not clear because the oral intak. of procyanidins results in pleiotropic interactions with proteins in the mouth, stomach, small intestine, cecum and colon that affect the rate of digestion of bioavailability of macronutrients, sterols, and dietary fiber. Procyanidins also bind bile acids and reduce intestinal permeability to inflammatory bacterial cell wall fragment. Procyanidins are not degraded or metabolized until reaching the lower gut where they can be metabolized into phenolic acids by gut bacteria. While they are metabolized by gut bacteria,they also alter total numbers and distribution of phyla and species of gut bacteria. Gut bacteria are recognized as significant contributors to obesity and obesity related metabolic diseases. The review examines the different pleiotropic effects of grape seed procyanidins that have a significant effect on metabolic disease in animal models of obesity.

关键词： grape seed obesity procyanidins high fat microbiota animal models

Generating Hyperchaos via a Simple Periodic Forcing Signal

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Generating Hyperchaos via a Simple Periodic Forcing Signal