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https://www.readbyqxmd.com/read/29786887/perovskite-solar-cells-with-inorganic-electron-and-hole-transport-layers-exhibiting-long-term-%C3%A2-500-h-stability-at-85-%C3%A2-c-under-continuous-1-sun-illumination-in-ambient-air
#1
Seongrok Seo, Seonghwa Jeong, Changdeuck Bae, Nam-Gyu Park, Hyunjung Shin
Despite the high power conversion efficiency (PCE) of perovskite solar cells (PSCs), poor long-term stability is one of the main obstacles preventing their commercialization. Several approaches to enhance the stability of PSCs have been proposed. However, an accelerating stability test of PSCs at high temperature under the operating conditions in ambient air remains still to be demonstrated. Herein, interface-engineered stable PSCs with inorganic charge-transport layers are shown. The highly conductive Al-doped ZnO films act as efficient electron-transporting layers as well as dense passivation layers...
May 22, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29786075/tp53-gain-of-function-mutation-promotes-inflammation-in-glioblastoma
#2
Seok Won Ham, Hee-Young Jeon, Xiong Jin, Eun-Jung Kim, Jun-Kyum Kim, Yong Jae Shin, Yeri Lee, Se Hoon Kim, Seon Yong Lee, Sunyoung Seo, Min Gi Park, Hye-Mi Kim, Do-Hyun Nam, Hyunggee Kim
Glioblastoma (GBM), the most severe and common brain tumor in adults, is characterized by multiple somatic mutations and aberrant activation of inflammatory responses. Immune cell infiltration and subsequent inflammation cause tumor growth and resistance to therapy. Somatic loss-of-function mutations in the gene encoding tumor suppressor protein p53 (TP53) are frequently observed in various cancers. However, numerous studies suggest that TP53 regulates malignant phenotypes by gain-of-function (GOF) mutations...
May 21, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29785699/spectroscopic-analysis-of-the-cu-2-induced-fluorescence-quenching-of-fluorescent-proteins-amcyan-and-morange2
#3
Ji-Eun Bae, In Jung Kim, Ki Hyun Nam
Fluorescent proteins show fluorescence quenching by specific metal ions, which can be applied towards metal biosensing applications. In order to develop metal-biosensor, we performed spectroscopic analysis of the fluorescence quenching of fluorescent protein AmCyan and mOrange2 by various metal ions. The fluorescence intensity of AmCyan was reduced to 48.54% by Co2+ and 67.77% by Zn2+ ; Cu2+ reduced the fluorescence emission of AmCyan to 19.30% of its maximum. The fluorescence intensity of mOrange2 was quenched by only Cu2+ , to 11...
May 21, 2018: Molecular Biotechnology
https://www.readbyqxmd.com/read/29783899/the-effect-of-tai-chi-training-on-the-dual-tasking-performance-of-stroke-survivors-a-randomized-controlled-trial
#4
Wing Nga Chan, William Wai-Nam Tsang
OBJECTIVE: To compare the effect of Tai Chi training with conventional exercise on dual-tasking performance among stroke survivors. DESIGN: An assessor-blinded, randomized controlled trial. SUBJECTS: Community-dwelling stroke survivors. SETTING: Community centers and university. INTERVENTIONS: Subjects in the Tai Chi group and the conventional exercise group were trained with the corresponding exercises for 12 weeks (1 hour/session, 2/week)...
May 1, 2018: Clinical Rehabilitation
https://www.readbyqxmd.com/read/29782798/regulatory-activities-of-dopamine-and-its-derivatives-towards-metal-free-and-metal-induced-amyloid-%C3%AE-aggregation-oxidative-stress-and-inflammation-in-alzheimer-s-disease
#5
Eunju Nam, Jeffrey S Derrick, Seunghee Lee, Juhye Kang, Jiyeon Han, Shin Jung C Lee, Su Wol Chung, Mi Hee Lim
A catecholamine neurotransmitter, dopamine (DA), is suggested to be linked to the pathology of dementia; however, the involvement of DA and its structural analogues in the pathogenesis of Alzheimer's disease (AD), the most common form of dementia, composed of multiple pathogenic factors has not been clear. Herein, we report that DA and its rationally designed structural derivatives (1-6) based on DA's oxidative transformation are able to modulate multiple pathological elements found in AD [ i.e., metal ions, metal-free amyloid-β (Aβ), metal-bound Aβ (metal-Aβ), and reactive oxygen species (ROS)], with demonstration of detailed molecular-level mechanisms...
May 21, 2018: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29782683/nife-oxy-hydroxides-derived-from-nife-disulfides-as-an-efficient-oxygen-evolution-catalyst-for-rechargeable-zn-air-batteries-the-effect-of-surface-s-residues
#6
Tanyuan Wang, Gyutae Nam, Yue Jin, Xingyu Wang, Pengju Ren, Min Gyu Kim, Jiashun Liang, Xiaodong Wen, Haeseong Jang, Jiantao Han, Yunhui Huang, Qing Li, Jaephil Cho
A facile H2 O2 oxidation treatment to tune the properties of metal disulfides for oxygen evolution reaction (OER) activity enhancement is introduced. With this method, the degree of oxidation can be readily controlled and the effect of surface S residues in the resulted metal (oxy)hydroxides for the OER is revealed for the first time. The developed NiFe (oxy)hydroxide catalyst with residual S demonstrates an extraordinarily low OER overpotential of 190 mV at the current density of 10 mA cm-2 after coupling with carbon nanotubes, and outstanding performance in Zn-air battery tests...
May 21, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29782518/objective-assessment-of-flap-volume-changes-and-aesthetic-results-after-adjuvant-radiation-therapy-in-patients-undergoing-immediate-autologous-breast-reconstruction
#7
Yujin Myung, Yousung Son, Tae-Hyun Nam, Eunyoung Kang, Eun-Kyu Kim, In Ah Kim, Keun-Yong Eom, Chan Yeong Heo, Jae Hoon Jeong
BACKGROUND: The use of immediate breast reconstruction and adjuvant radiation therapy is increasing in breast cancer patients. This study aimed to analyze the aesthetic outcome and changes in flap volume in patients with breast cancer undergoing radiation therapy of the surgical site after immediate autologous tissue reconstruction. METHODS: Immediate abdominal free flap breast reconstruction following unilateral mastectomy was performed in 42 patients; 21 patients received adjuvant radiation (study group) and 21 patients did not (control group)...
2018: PloS One
https://www.readbyqxmd.com/read/29782036/differential-diagnosis-of-jaw-pain-using-informatics-technology
#8
Yoon Nam, Hong-Gee Kim, Hong-Seop Kho
This study aimed to deduce evidence-based clinical clues that differentiate temporomandibular disorders (TMD)-mimicking conditions from genuine TMD by text mining using natural language processing (NLP) and recursive partitioning. We compared the medical records of 29 patients diagnosed with TMD-mimicking conditions and 290 patients diagnosed with genuine TMD. Chief complaints and medical histories were preprocessed via NLP to compare the frequency of word usage. In addition, recursive partitioning was used to deduce the optimal size of mouth opening, which could differentiate TMD-mimicking from genuine TMD groups...
May 21, 2018: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/29781725/the-effects-of-an-expanded-cognitive-stimulation-therapy-model-on-the-improvement-of-cognitive-ability-of-elderly-with-mild-stage-dementia-living-in-a-community-a-randomized-waitlist-controlled-trial
#9
Daniel Kim-Wan Young, Petrus Yat-Nam Ng, Timothy Kwok, Florence Ho, Daphne Cheng, Vivan Mak, Andrew Lau
OBJECTIVE: This research study aims to evaluate the effectiveness of an expanded cognitive stimulation therapy (CST) model that combines a CST group and tai chi on improving the cognitive ability of community-dwelling Chinese elderly with mild stage dementia (EwMD). METHOD: A randomized waitlist controlled trial design was adopted in this study. The treatment group participated in a structured CST group followed by tai chi twice a week, with a total of 14 sessions throughout the study period...
May 21, 2018: Aging & Mental Health
https://www.readbyqxmd.com/read/29781178/the-effects-of-platelet-rich-plasma-on-hypertrophic-scars-fibroblasts
#10
Seung Min Nam, Yong Bae Kim
We hypothesised that a feedback mechanism of the transforming growth factor (TGF)-β1 signalling pathway, triggered by high-level TGF-β1, activates platelet-rich plasma (PRP) release to reduce connective tissue growth factor (CTGF) production and expression of CTGF mRNA in hypertrophic scar dermal fibroblasts. Primary dermal fibroblasts were isolated from cultures of hypertrophic scars. Cells were cultured after addition of serum-free Dulbecco's modified Eagle's medium supplemented with 5% (wt/vol) PRP or platelet-poor plasma (PPP)...
May 21, 2018: International Wound Journal
https://www.readbyqxmd.com/read/29780816/identification-of-phosphohistone-h3-cutoff-values-corresponding-to-original-who-grades-but-distinguishable-in-well-differentiated-gastrointestinal-neuroendocrine-tumors
#11
Min Jeong Kim, Mi Jung Kwon, Ho Suk Kang, Kyung Chan Choi, Eun Sook Nam, Seong Jin Cho, Hye-Rim Park, Soo Kee Min, Jinwon Seo, Ji-Young Choe, Hyoung-Chul Park
Mitotic counts in the World Health Organization (WHO) grading system have narrow cutoff values. True mitotic figures, however, are not always distinguishable from apoptotic bodies and darkly stained nuclei, complicating the ability of the WHO grading system to diagnose well-differentiated neuroendocrine tumors (NETs). The mitosis-specific marker phosphohistone H3 (PHH3) can identify true mitoses and grade tumors reliably. The aim of this study was to investigate the correspondence of tumor grades, as determined by PHH3 mitotic index (MI) and mitotic counts according to WHO criteria, and to determine the clinically relevant cutoffs of PHH3 MI in rectal and nonrectal gastrointestinal NETs...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29780169/mediator-kinase-cdk8-cdk19-drives-yap1-dependent-bmp4-induced-emt-in-cancer
#12
Anne Serrao, Laura M Jenkins, Alexander A Chumanevich, Ben Horst, Jiaxin Liang, Michael L Gatza, Nam Y Lee, Igor B Roninson, Eugenia V Broude, Karthikeyan Mythreye
CDK8 is a transcription-regulating kinase that controls TGF-β/BMP-responsive SMAD transcriptional activation and turnover through YAP1 recruitment. However, how the CDK8/YAP1 pathway influences SMAD1 response in cancer remains unclear. Here we report that SMAD1-driven epithelial-to-mesenchymal transition (EMT) is critically dependent on matrix rigidity and YAP1 in a wide spectrum of cancer models. We find that both genetic and pharmacological inhibition of CDK8 and its homologous twin kinase CDK19 leads to abrogation of BMP-induced EMT...
May 21, 2018: Oncogene
https://www.readbyqxmd.com/read/29780057/prevalence-and-risk-factors-of-dengue-infection-in-khanh-hoa-province-viet-nam-a-stratified-cluster-sampling-survey
#13
Vien Quang Mai, Trịnh Thị Xuan Mai, Ngo Le Minh Tam, Le Trung Nghia, Kenichi Komada, Hitoshi Murakami
BACKGROUND: Dengue is a clinically important arthropod-borne viral disease with increasing global incidence. Here we aimed to estimate the prevalence of dengue infections in Khanh Hoa Province, central Viet Nam, and to identify risk factors for infection. METHODS: We performed a stratified cluster sampling survey including residents of 3-60 years of age in Nha Trang City, Ninh Hoa District and Dien Khanh District, Khanh Hoa Province, in October 2011. Immunoglobulin G (IgG) and immunoglobulin M (IgM) against dengue were analyzed using a rapid test kit...
May 19, 2018: Journal of Epidemiology
https://www.readbyqxmd.com/read/29779869/genotypic-characteristics-and-their-association-with-phenotypic-characteristics-of-hereditary-medullary-thyroid-carcinoma-in-korea
#14
Kyong Yeun Jung, Seok-Mo Kim, Min Joo Kim, Sun Wook Cho, Bup-Woo Kim, Yong Sang Lee, Jong Ju Jeong, Kee-Hyun Nam, Woong Youn Chung, Kyu Eun Lee, Eun-Jae Chung, Hyo Jeong Kim, Do Joon Park, Myung-Whun Sung, Cheong Soo Park, Bo Young Cho, Young Joo Park, Hang-Seok Chang
BACKGROUND: Hereditary medullary thyroid carcinoma can present as a part of multiple endocrine neoplasia syndrome by rearranged during transfection gene mutation. We evaluated the prevalence of rearranged during transfection gene mutation in patients who have medullary thyroid carcinoma and the correlations of genotype with medullary thyroid carcinoma, pheochromocytoma, and hyperparathyroidism according to the revised American Thyroid Association risk level. METHODS: A total of 331 patients were diagnosed with medullary thyroid carcinoma, 172 of whom were tested for the rearranged during transfection germline mutation by sequencing of exon 8, 10, 11, and 13-16...
May 17, 2018: Surgery
https://www.readbyqxmd.com/read/29779430/intratumoral-immune-cells-expressing-pd-1-pd-l1-and-their-prognostic-implications-in-cancer-a-meta-analysis
#15
Younghoon Kim, Xianyu Wen, Nam Yun Cho, Gyeong Hoon Kang
BACKGROUND: The prognostic value of immune cells expressing programmed cell death 1 (PD-1) and PD-1 ligand 1 (PD-L1) in cancer are controversial, and the potential differential impact of using tissue microarrays and whole tissue sections to assess the positivity of immune cells has not been addressed. METHODS: The current study included 30 eligible studies with 7251 patients that evaluated the relationship between tumor-infiltrating lymphocytes expressing PD-1/PD-L1 and overall survival and disease-free survival, or progression-free survival...
May 1, 2018: International Journal of Biological Markers
https://www.readbyqxmd.com/read/29779363/prognostic-factors-affecting-surgical-outcomes-in-squamous-cell-carcinoma-of-external-auditory-canal
#16
Gi-Sung Nam, In Seok Moon, Ji Hyung Kim, Sung Huhn Kim, Jae Young Choi, Eun Jin Son
Objectives: Carcinomas of the external auditory canal (EAC) are rare, and management remains challenging. Previous studies seeking prognostic factors for EAC cancers included cancers other than carcinomas. In this study, we analyzed the treatment outcomes of, prognostic factors for, and survival rates associated with specifically squamous cell carcinoma (SCC) of the EAC. Methods: A retrospective review of 26 consecutive patients diagnosed with SCCs of the EAC in a 10-year period was performed in terms of clinical presentation, stage, choice of surgical procedure, and adjunct therapy...
May 22, 2018: Clinical and Experimental Otorhinolaryngology
https://www.readbyqxmd.com/read/29779050/proprioceptive-loss-and-the-perception-control-and-learning-of-arm-movements-in-humans-evidence-from-sensory-neuronopathy
#17
R Chris Miall, Nick M Kitchen, Se-Ho Nam, Hannah Lefumat, Alix G Renault, Kristin Ørstavik, Jonathan D Cole, Fabrice R Sarlegna
It is uncertain how vision and proprioception contribute to adaptation of voluntary arm movements. In normal participants, adaptation to imposed forces is possible with or without vision, suggesting that proprioception is sufficient; in participants with proprioceptive loss (PL), adaptation is possible with visual feedback, suggesting that proprioception is unnecessary. In experiment 1 adaptation to, and retention of, perturbing forces were evaluated in three chronically deafferented participants. They made rapid reaching movements to move a cursor toward a visual target, and a planar robot arm applied orthogonal velocity-dependent forces...
May 19, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29778349/a-contemporary-prostate-biopsy-risk-calculator-based-on-multiple-heterogeneous-cohorts
#18
Donna P Ankerst, Johanna Straubinger, Katharina Selig, Lourdes Guerrios, Amanda De Hoedt, Javier Hernandez, Michael A Liss, Robin J Leach, Stephen J Freedland, Michael W Kattan, Robert Nam, Alexander Haese, Francesco Montorsi, Stephen A Boorjian, Matthew R Cooperberg, Cedric Poyet, Emily Vertosick, Andrew J Vickers
BACKGROUND: Prostate cancer prediction tools provide quantitative guidance for doctor-patient decision-making regarding biopsy. The widely used online Prostate Cancer Prevention Trial Risk Calculator (PCPTRC) utilized data from the 1990s based on six-core biopsies and outdated grading systems. OBJECTIVE: We prospectively gathered data from men undergoing prostate biopsy in multiple diverse North American and European institutions participating in the Prostate Biopsy Collaborative Group (PBCG) in order to build a state-of-the-art risk prediction tool...
May 16, 2018: European Urology
https://www.readbyqxmd.com/read/29778318/quality-specifications-for-articles-of-botanical-origin-from-the-united-states-pharmacopeia
#19
Cuiying Ma, Hellen Oketch-Rabah, Nam-Cheol Kim, Maria Monagas, Anton Bzhelyansky, Nandakumara Sarma, Gabriel Giancaspro
BACKGROUND: In order to define appropriate quality of botanical dietary supplements, botanical drugs, and herbal medicines, the United States Pharmacopeia (USP) and the Herbal Medicines Compendium (HMC) contain science-based quality standards that include multiple interrelated tests to provide a full quality characterization for each article in terms of its identity, purity, and content. PURPOSE: To provide a comprehensive description of the pharmacopeial tests and requirements for articles of botanical origin in the aforementioned compendia...
April 10, 2018: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/29778073/non-selective-rapid-electro-oxidation-of-persistent-refractory-vocs-in-industrial-wastewater-using-a-highly-catalytic-and-dimensionally-stable-irpd-ti-composite-electrode
#20
Wan-Cheol Cho, Kyung-Min Poo, Hend Omar Mohamed, Tae-Nam Kim, Yul-Seong Kim, Moon Hyun Hwang, Do-Won Jung, Kyu-Jung Chae
Volatile organic compounds (VOCs) are highly toxic contaminants commonly dissolved in industrial wastewater. Therefore, treatment of VOC-containing wastewater requires a robust and rapid reaction because liquid VOCs can become volatile secondary pollutants. In this study, electro-oxidation with catalytic composite dimensionally stable anodes (DSAs)-a promising process for degrading organic pollutants-was applied to remove various VOCs (chloroform, benzene, toluene, and trichloroethylene). Excellent treatment efficiency of VOCs was demonstrated...
May 11, 2018: Chemosphere
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