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Diffusion capacity

Liqi Sun, Yingying Xie, Xiao-Zhen Liao, Hong Wang, Guoqiang Tan, Zonghai Chen, Yang Ren, Jihyeon Gim, Wan Tang, Yu-Shi He, Khalil Amine, Zi-Feng Ma
O3-type NaNi1/3 Fe1/3 Mn1/3 O2 (NaNFM) is well investigated as a promising cathode material for sodium-ion batteries (SIBs), but the cycling stability of NaNFM still needs to be improved by using novel electrolytes or optimizing their structure with the substitution of different elements sites. To enlarge the alkali-layer distance inside the layer structure of NaNFM may benefit Na+ diffusion. Herein, the effect of Ca-substitution is reported in Na sites on the structural and electrochemical properties of Na1- x Cax /2 NFM (x = 0, 0...
April 18, 2018: Small
Suqin Zhu, Haohao Wu, Caili Zhang, Jinxin Jie, Zunying Liu, Mingyong Zeng, Changyun Wang
Shewanella baltica and Acinetobacter are among the predominant spoilage bacteria in refrigerated shrimp ( Litopenaeus vannamei ). S. baltica are incapable of producing acyl-homoserine lactone (AHL) quorum sensing signals, but can respond to environmental AHLs. In this paper, Acinetobacter was found to produce three AHLs, i.e. N -butanoyl-l-homoserine lactone (C4-HSL), N -(3-oxohexanoyl)-l-homoserine lactone (O-C6-HSL) and N -(3-oxooctanoyl)-l-homoserine lactone (O-C8-HSL), according to thin-layer chromatography using the bioreporter Agrobacterium tumefaciens A136...
May 2018: Journal of Food Science and Technology
Wei Huang, Hongyu Sun, Huihui Shangguan, Xianyi Cao, Xinxin Xiao, Fei Shen, Kristian Mølhave, Lijie Ci, Pengchao Si, Jingdong Zhang
Three-dimensional (3D) carbon-wrapped iron sulfide interlocked graphene (Fe7S8@C-G) composites for high-performance sodium-ion storage are designed and produced through electrostatic interactions and subsequent sulfurization. The iron-based metal-organic frameworks (MOFs, MIL-88-Fe) interact with graphene oxide sheets to form 3D networks, and carbon-wrapped iron sulfide (Fe7S8@C) nanoparticles with high individual-particle conductivity are prepared following a sulfurization process, surrounded by interlocked graphene sheets to enhance the interparticle conductivity...
April 17, 2018: Nanoscale
Umma Habiba, Tawsif A Siddique, Jacky Jia Li Lee, Tan Chin Joo, Bee Chin Ang, Amalina M Afifi
The chitosan/polyvinyl Alcohol/zeolite electrospun composite nanofibrous membrane was fabricated for adsorption of methyl orange. The EDX, TGA and tensile test were carried out for the characterization of the membrane. The Young's Modulus of the nanofibrous membranes increased by more than 100% with the addition of zeolite to chitosan/PVA. The batch adsorption tests were conducted by varying the initial concentration of methyl orange, contact time and pH of the dye solution. UV-vis results showed that most of the dye was adsorbed within 6 min...
July 1, 2018: Carbohydrate Polymers
Oksana Kamenskaya, Irina Loginova, Alexander Chernyavskiy, Aleksander Edemskiy, Vladimir V Lomivorotov, Aleksander Karaskov
OBJECTIVE: The aim of our study was to investigate the prevalence of chronic obstructive pulmonary disease (COPD) in patients with chronic thromboembolic pulmonary hypertension (CTEPH) and examine their impact on the results of pulmonary thrombendarterectomy (PEA). METHODS: We enrolled 136 patients with CTEPH who scheduled for elective PEA. Pulmonary function tests (PFTs) including full-body plethysmography with bronchodilation test and lung diffusion capacity assessment were performed in all patients prior to surgery treatment...
April 16, 2018: Clinical Respiratory Journal
Athina C Tsili, Alexandra Ntorkou, Anna Goussia, Loukas Astrakas, Eleni Panopoulou, Nikolaos Sofikitis, Maria I Argyropoulou
BACKGROUND: The development of noninvasive imaging parameters having the capacity to identify the population of men with nonobstructive azoospermia (NOA) where a successful sperm retrieval outcome is of great clinical significance. PURPOSE/HYPOTHESIS: To assess differences of apparent diffusion coefficient (ADC) and fractional anisotropy (FA) in NOA testes with impaired spermatogenesis and the possible association with the presence of spermatozoa after testicular sperm extraction (TESE)...
April 16, 2018: Journal of Magnetic Resonance Imaging: JMRI
Feng Li, Xiaoming Zhang, Xiaobiao Liu, Mingwen Zhao
Despite the high theoretical capacity of lithium-sulfur (Li-S) batteries, their commercialization is severely hindered by low cycle stability and low efficiency, stemming from the dissolution and diffusion of lithium polysulfides (LiPSs) in the electrolyte. In this study, we propose a novel two-dimensional (2D) conductive metal-organic framework (MOF), namely Cu-BHT, as a promising sulfur host material for high-performance Li-S battery. The excellent conductivity of the Cu-BHT eliminates the insulating nature of S-based electrodes...
April 16, 2018: ACS Applied Materials & Interfaces
Farkhondeh Poursina, Shima Sepehrpour, Sina Mobasherizadeh
Background: Escherichia coli is a Gram-negative, opportunistic human pathogen in which increasing antibiotic resistance is a great concern for continued human survival. Although biofilm formation is a mechanism that helps E. coli to survive in unfavorable conditions, according to the importance of biofilm formation in developing the antibiotic resistance here, we studied the relation between antibiotic resistance and in vitro qualitative rating method biofilm formation in E. coli isolated from patients with urinary tract infection (UTI)...
2018: Advanced Biomedical Research
Somak Chatterjee, Sanjay Jha, Sirshendu De
Low cost naturally available bone meal was carbonized and its fluoride adsorption capacity was explored. Carbonized bone meal (CBM) produced at 550°C, 4 h carbonization time and a heating rate of 60°C/min, showed fluoride adsorption capacity of 14 mg g-1 . Adsorbent was characterized using scanning electron microscopy, X-ray diffraction, X-ray fluoroscence, thermogravimetric analysis and Fourier transform infrared spectroscopy to highlight its physical and chemical properties. Best fluoride uptake capacity was observed for 0...
April 13, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Wolfram Windisch, Carl Peter Criée
Pulmonary function testing is essential for diagnosis and treatment-guidance of chronic obstructive pulmonary disease (COPD). Airway obstruction as assessed by spirometry should follow the reference-values provided by the Global Lung Initiative (GLI) of the European Respiratory Society (ERS). In addition, lung function testing should also include the assessment of lung hyperinflation and pulmonary emphysema by full-body plethysmography and determination of diffusion capacity. This is important since both, lung hyperinflation and pulmonary emphysema, can present without existing airway obstruction...
April 2018: Deutsche Medizinische Wochenschrift
Ashish Kumar Nayak, Anjali Pal
In this research, the performance of naturally abundant lignocellulosic by-product, Abelmoschus esculentus, and its processed seed powder referred as AESP, as a potential biosorbent for the removal of acridine orange (AO) from the aqueous environment was examined. The AESP biosorbent was characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) analysis, diffuse reflectance spectroscopy (DRS), Fourier transform infrared (FTIR) and pHZPC analyses. The average size of the biosorbent according to particle size distribution analysis was found to be ∼132 μm...
April 9, 2018: Journal of Environmental Management
Kaoruko Shimizu, Satoshi Konno, Hironi Makita, Hirokazu Kimura, Hiroki Kimura, Masaru Suzuki, Masaharu Nishimura
The overlap between asthma and chronic obstructive pulmonary disease (COPD) has attracted the interest of pulmonary physicians; thus, measurement of carbon monoxide diffusion capacity (DLco) and/or transfer coefficients (Kco, DLco/VA) may become valuable in clinical settings. How these parameters behave in chronic obstructive lung diseases is poorly understood. We predicted that Kco might more accurately reflect emphysematous changes in the lungs, than DLco. We examined DLco and Kco in non-smokers and smokers with asthma and investigated their relationships with forced expiratory volume in 1 s (%FEV1 ) by group...
April 12, 2018: Journal of Applied Physiology
Patrick J Kim, Harif D Fontecha, Kyungho Kim, Vilas G Pol
Lithium sulfur batteries have been intensively explored during last decades as next-generation batteries due to the high energy density of 2600 Wh kg-1 and low cost. However, systemic challenges, mainly associated polysulfide shuttling and low Coulombic efficiency, plague the practical utilization of sulfur cathode in battery market. In order to address the issues mentioned above, many approaches have been investigated by tailoring the surface characterisitics and porosities of carbon scaffold. In this article, we first present a facile and effective strategy of preparing porous sulfonated carbon (PSC) from low density polyethylene (LDPE) plastic via microwave-promoted sulfonation...
April 12, 2018: ACS Applied Materials & Interfaces
Wei Fan, Xizheng Liu, Zhifeng Wang, Pengyang Fei, Ruie Zhang, Yahui Wang, Chunling Qin, Weimin Zhao, Yi Ding
The major obstacles which prohibit the practical applications of alloy-type anodes include insufficient ionic/electronic transportations and structural failures. Herein, we report the fabrication of a carbon-coated nanoporous SnSb alloy (NP-SnOxSb@C) and its application as an anode in Li-ion batteries (LIBs). The as-fabricated NP-SnOxSb@C is characterized by SEM and TEM and demonstrates a bi-continuous nanoporous structure. Amorphous carbon is found to be uniformly coated on the alloy surface. When used as an anode for LIB, NP-SnOxSb@C displays a high capacity (850 mA h g-1 after the 50th cycle) and good rate performance of 664 mA h g-1 at 2000 mA g-1...
April 12, 2018: Nanoscale
Heeok Hong, Jun-Hyeong Lee, Soo-Ki Kim
Objective: To find biological functions such as antibacterial and antioxidant activities in several tropical plants and to investigate the possibility of antibiotic substitute agents to prevent and treat diseases caused by pathogenic bacteria. Methods: Those plants such as Poncirus trifoliata fruit (Makrut), Zingiber officinale Rosc (Khing), Areca catechu L. (Mak), Solanum melongena L. I (Makkhuayao), and Solanum melongena L. II (Makhurapro) were extracted by methanol, n-hexane, chloroform, ethyl acetate, butanol and water...
April 12, 2018: Asian-Australasian Journal of Animal Sciences
J-F Du, Y-M Chi, Z Song, Q-G Di, J Shi, J Lv, Z-T Mai, M Li, B-H Sun, M-M Jiang
OBJECTIVE: To explore the clinical efficacy of sequential therapy with voriconazole on chronic obstructive pulmonary disease (COPD) patients in acute phase with pulmonary aspergillosis and its effects on cytokines and pulmonary functions. PATIENTS AND METHODS: A total of 110 COPD patients in acute phase with pulmonary aspergillosis who were admitted to the hospital between February 2015 and November 2016 were enrolled. We divided them randomly into two groups, i...
March 2018: European Review for Medical and Pharmacological Sciences
Sanni L Aalto, Jatta Saarenheimo, Janne Ropponen, Janne Juntunen, Antti J Rissanen, Marja Tiirola
Sediment microbes have a great potential to transform reactive N to harmless N2 , thus decreasing wastewater nitrogen load into aquatic ecosystems. Here, we examined if spatial allocation of the wastewater discharge by a specially constructed sediment diffuser pipe system enhanced the microbial nitrate reduction processes. Full-scale experiments were set on two Finnish lake sites, Keuruu and Petäjävesi, and effects on the nitrate removal processes were studied using the stable isotope pairing technique. All nitrate reduction rates followed nitrate concentrations, being highest at the wastewater-influenced sampling points...
March 27, 2018: Water Research
Kyung-Won Jung, Seon Yong Lee, Young Jae Lee
In this study, hierarchical birnessite-type MnO2 /biochar composites (δ-MnO2 /BCs) were synthesized by a hydrothermal technique, and their Cu(II) removal performance was examined in aqueous solution. Morphological characterization confirmed that a three-dimensional flower-like structure of δ-MnO2 was formed, which results in effective adsorption affinity towards Cu(II). The effects of solution pH, adsorbent dosage, and ionic strength on the adsorption behavior of the prepared materials were systemically investigated...
March 31, 2018: Bioresource Technology
Walpurga Krepper, Peter Satzer, Beate Maria Beyer, Alois Jungbauer
Staphylococcal protein A affinity chromatography is a well-established platform for purification of clinical-grade antibodies. The wild type ligand has been mutated to improve caustic stability, elution behavior, and/or to increase binding capacity. Several modified protein A ligands are nowadays commercially available, one of them being the thermosensitive chromatography medium Byzen Pro from Nomadic Bioscience Co., Ltd. According to the manufacturer, Byzen Pro has the ability to release IgG upon a change in temperature...
March 30, 2018: Journal of Chromatography. A
W M Gayashani Sandamalika, Thanthrige Thiunuwan Priyathilaka, D S Liyanage, Sukkyoung Lee, Han-Kyu Lim, Jehee Lee
Glutathione S-transferase (GST; EC isoenzymes represent a complex group of proteins that are involved in phase II detoxification in several organisms. In this study, GST kappa (GSTκ) from the disk abalone (Haliotis discus discus; AbGSTκ) was characterized at both the transcriptional and functional levels to determine its potential capacity to perform as a detoxification agent under conditions of different stress. The predicted AbGSTκ protein consists of 227 amino acids, with a predicted molecular weight of 25...
April 2, 2018: Fish & Shellfish Immunology
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