bluuebunny/crossref_metadata_2025 huggingface dataset:
Alteration in glucose homeostasis and persistence of the pancreatic clock in aged mPer2Luc mice
Authors: Novosadová Zuzana , Polidarová Lenka , Sládek Martin , Sumová Alena
Published: July 2018

The physiological function of the pancreas is controlled by the circadian clock. The aim of this study was to determine whether aging-induced changes in glucose homeostasis affect properties of the circadian clock in the pancreas and/or its sensitivity to disturbances in environmental lighting conditions. mPer2Luc mice aged 24–26 months developed hyperinsulinemic hypoglycaemia, which was likely due to the Pclo-mediated insulin hyper-secretion and Slc2a2-mediated glucose transport impairment in the pancreas, and due to the alterations in Pp1r3c-related glycogen storage and Sgk1-related glucose transport in the liver. In the pancreatic tissue, aging affected clock gene expression only marginally, it upregulated Bmal1 and downregulated Clock expression. Whereas aging significantly impaired the circadian clock in lung explants, which were used as a control tissue, the properties of the pancreatic clock in vitro were not affected. The data suggest a non-circadian role of Bmal1 in changes of pancreatic function that occur during aging. Additionally, the pancreatic clock was more sensitive to exposure of animals to constant light conditions. These findings provide an explanation for the previously demonstrated relationship between disturbances in the circadian system and disordered glucose homeostasis, including diabetes mellitus type 2, in subjects exposed to long-term shift work.
Identification and characterization of TP53 gene Allele Dropout in Li-Fraumeni syndrome and Oral cancer cohorts
Authors: Haque Mohammed Moquitul , Kowtal Pradnya , Sarin Rajiv
Published: July 2018

Allele Drop out (ADO) arising from non-amplification of one allele may produce false negative result and impact clinical management. In cancer, germline and somatic genetic analysis is being increasingly used but the prevalence, nature and implications of ADO has not been studied in any cohort. In a cohort of 290 Li Fraumeni/Li Fraumeni Like Syndrome cases undergoing TP53 genetic testing, of the 69 pathogenic mutations identified so far, 5 were initially missed and 4 were misgenotyped as homozygous mutation due to germline ADO. Of the 9 germline ADOs, 8 were sequence dependent, arising from a polymorphism (rs12951053) in the primer annealing region of exon 7. Of 35 somatic TP53 variants identified by exome sequencing in 50 oral cancer tissues registered under International Cancer Genome Consortium (ICGC), as a result of ADO, 4 were not detectable and 6 were not called as variant on Sanger Sequencing due to low peak height. High prevalence of germline and somatic ADO in the most frequently mutated cancer gene TP53, highlights the need for systematic evaluation of ADO prevalence and causes in clinically important cancer genes. False negative result for high penetrance germline mutations or actionable somatic mutations in oncogenes could have major clinical implications.
A framework for large-scale metabolome drug profiling links coenzyme A metabolism to the toxicity of anti-cancer drug dichloroacetate
Authors: Dubuis Sébastien , Ortmayr Karin , Zampieri Mattia
Published: July 2018

Metabolic profiling of cell line collections has become an invaluable tool to study disease etiology, drug modes of action and to select personalized treatments. However, large-scale in vitro dynamic metabolic profiling is limited by time-consuming sampling and complex measurement procedures. By adapting a mass spectrometry-based metabolomics workflow for high-throughput profiling of diverse adherent mammalian cells, we establish a framework for the rapid measurement and analysis of drug-induced dynamic changes in intracellular metabolites. This methodology is scalable to large compound libraries and is here applied to study the mechanism underlying the toxic effect of dichloroacetate in ovarian cancer cell lines. System-level analysis of the metabolic responses revealed a key and unexpected role of CoA biosynthesis in dichloroacetate toxicity and the more general importance of CoA homeostasis across diverse human cell lines. The herein-proposed strategy for high-content drug metabolic profiling is complementary to other molecular profiling techniques, opening new scientific and drug-discovery opportunities.
Anab initioinvestigation on the electronic structure, defect energetics, and magnesium kinetics in Mg3Bi2
Authors: Lee Jeongjae , Monserrat Bartomeu , Seymour Ieuan D. , Liu Zigeng , Dutton Siân E. , Grey Clare P.
Published: July 2018

We show that vacancy creation and relativistic spin–orbit coupling play a crucial role in promoting fast Mg-ion conduction of Mg3Bi2.
Advances in surface-enhanced Raman spectroscopy (SERS) substrates for lipid and protein characterization: sensing and beyond
Authors: Bruzas Ian , Lum William , Gorunmez Zohre , Sagle Laura
Published: July 2018

Developments in SERS substrates are enabling detection and biophysical characterization of lipids, protein and cellular systems with improved sensitivity, reproducibility and biocompatibility.
Estimation of G-quartet-forming guanines in parallel-type G-quadruplexes by optical spectroscopy measurements of their single-nucleobase substitution sequences
Authors: Maruyama Ryo , Makino Kurumi , Yoshitomi Toru , Yui Hiroharu , Furusho Hitoshi , Yoshimoto Keitaro
Published: July 2018

Here, we established a new estimation method for G-quartet-forming guanines in parallel-type G-quadruplexes using measurements of circular dichroism and thermal stability.
Using polyoxometalates to enhance the capacity of lithium–oxygen batteries
Authors: Homewood Tom , Frith James T. , Vivek J. Padmanabhan , Casañ-Pastor Nieves , Tonti Dino , Owen John R. , Garcia-Araez Nuria
Published: July 2018

Improving Li–O2 batteries with the highly stable Keggin type-polyoxometalate α-SiW12O404−.
A coupled chlorinase–fluorinase system with a high efficiency oftrans-halogenation and a shared substrate tolerance
Authors: Sun H. , Zhao H. , Ang E. L.
Published: July 2018

SAM-dependent chlorinases exhibited tolerance to the modification at the C-2 position of the adenosine substrate and acted cooperatively with fluorinase for rapidtrans-halogenation.
Fabrication and high ORR performance of MnOx nanopyramid layers with enriched oxygen vacancies
Authors: Zhang Yong , Wang Chengcheng , Fu Jiali , Zhao Hui , Tian Fang , Zhang Renjie
Published: July 2018

MnOx nanopyramids with enriched OVs vertically grown on nitrogen doped carbon microlaminate arrays with narrow spacing yield a high ORR performance.
Direct cation exchange of surface ligand capped upconversion nanocrystals to produce strong luminescence
Authors: Guan Ming , Zhou Zhiguang , Mei Lefu , Zheng Hong , Ren Wei , Wang Li , Du Yi , Jin Dayong , Zhou Jiajia
Published: July 2018

We develop a facile and rapid cation exchange method for upconversion nanocrystals (UCNCs) without removing surface ligands.
Metal nitrene-like reactivity of a SiN bond towards CO2
Authors: Hadlington Terrance J. , Szilvási Tibor , Driess Matthias
Published: July 2018

The unusual reactivity of the SiN bond in metallo-iminosilane [DippN = Si(OSiMe3)Ni(Cl)(NHC)2]1towards CO2and cyclohexyl isocyanate (CyNCO) is reported;1reacts with two molar equiv. of CO2to give the [2+2+2] cycloaddition product3with complete scission of the σ- and π-Si–N bonds, akin to transition-metal nitrene complexes.
Multifunctional metallo-supramolecular interlocked hexagonal microstructures for the detection of lead and thiols in water
Authors: Singh Prabhpreet , Mittal Lalit Singh , Kumar Kapil , Sharma Poonam , Bhargava Gaurav , Kumar Subodh
Published: July 2018

We report metallo-supramolecular interlocked hexagonal self-assembly associated with the near-IR detection of Pb2+ ions and thiols in water using a perylene diimide probe.
A computational study of the vibrationally-resolved electronic circular dichroism spectra of single-chain transoid and cisoid oligothiophenes in chiral conformations
Authors: Aranda Daniel , Cerezo Javier , Pescitelli Gennaro , Avila Ferrer Francisco J. , Soto Juan , Santoro Fabrizio
Published: July 2018

Vibronic calculations on oligothiophenes show that transoid twisted ribbons always give monsignated ECD while it is bisignated for cisoid helices.
A new thin layer cell for battery related DEMS-experiments: the activity of redox mediators in the Li–O2 cell
Authors: Bawol P. P. , Reinsberg P. , Bondue C. J. , Abd-El-Latif A. A. , Königshoven P. , Baltruschat H.
Published: July 2018

The activity of four different redox mediators was investigated with DEMS. The paper provides information about the underlying mechanism of Li2O2 oxidation by a redox mediator as well as about the stability of the redox mediator.
Energy dissipation to tungsten surfaces upon hot-atom and Eley–Rideal recombination of H2
Authors: Galparsoro Oihana , Busnengo H. Fabio , Martinez Alejandra E. , Juaristi Joseba Iñaki , Alducin Maite , Larregaray Pascal
Published: July 2018

Adiabatic and nonadiabatic quasi-classical molecular dynamics simulations are performed to investigate the role of electron–hole pair excitations in hot-atom and Eley–Rideal H2 recombination mechanisms on H-covered W(100). The influence of the surface structure is analyzed by comparing with previous results for W(110).
How does the electric current propagate through fully-hydrogenated borophene?
Authors: An Yipeng , Jiao Jutao , Hou Yusheng , Wang Hui , Wu Dapeng , Wang Tianxing , Fu Zhaoming , Xu Guoliang , Wu Ruqian
Published: July 2018

Borophane shows a perfect electrical anisotropy and is a promising candidate for nano-switching materials with a stable structure and a high ON/OFF ratio.
Superior solar-to-hydrogen energy conversion efficiency by visible light-driven hydrogen production via highly reduced Ti2+/Ti3+ states in a blue titanium dioxide photocatalyst
Authors: De Silva Nuwan Lakshitha , Jayasundera A. C. A. , Folger A. , Kasian O. , Zhang S. , Yan Chang-Feng , Scheu C. , Bandara J.
Published: July 2018

A catalytic hydrogen production system was developed with TiO2 that contains Ti3+/Ti2+ reduced states which act as both visible and IR light harvesting components as well as the catalytic site.
Highly efficient 3d/4d–4f coordination polymer catalysts for carbon dioxide fixation into cyclic carbonates
Authors: Wang Gang , Xu Cong , Wang Li , Liu Weisheng
Published: July 2018

Two novel highly efficient 3d/4d–4f one-dimensional (1D) double-chain coordination polymer catalysts with unique structures were synthesized for the first time.
Electrochemical potential window of battery electrolytes: the HOMO–LUMO misconception
Authors: Peljo Pekka , Girault Hubert H.
Published: July 2018

Electrolyte stability is governed by its oxidation and reduction potentials, not by the energy levels of its HOMO and LUMO.
Stimulation of CCK and GLP-1 secretion and expression in STC-1 cells by human jejunal contents and in vitro gastrointestinal digests from casein and whey proteins
Authors: Santos-Hernández Marta , Tomé Daniel , Gaudichon Claire , Recio Isidra
Published: July 2018

The present study evaluates casein and whey protein gastrointestinal digests as inducers of CCK and GLP-1 secretion and expression in STC-1 cells.
Enhanced moisture stability of metal halide perovskite solar cells based on sulfur–oleylamine surface modification
Authors: Hou Yu , Zhou Zi Ren , Wen Tian Yu , Qiao Hong Wei , Lin Ze Qing , Ge Bing , Yang Hua Gui
Published: July 2018

In this paper, oleylammonium polysulfides molecules were self-assembled on an etched perovskite film, leading to an enhancement in moisture stability of the devices.
Butterfly-shaped tetranuclear Ln4 clusters showing magnetic refrigeration and single molecule-magnet behavior
Authors: Wang Wen-Min , Han Tong-Lei , Shao Yan-Ling , Qiao Xin-Yi , Wu Zhi-Lei , Wang Qing-Li , Shi Peng Fei , Gao Hong-Ling , Cui Jian-Zhong
Published: July 2018

A series of butterfly-shaped LnIII4 clusters were successfully synthesized. Magnetic studies show that the Gd4 cluster displays magnetic refrigeration (ΔSm = 18.85 J kg−1 K−1 for ΔH = 7.0 T at 2.5 K), while the Dy4 cluster shows SMMs behavior with ΔE/kB of 79.15 K and τ0 of 5.82 × 10−8 s.
New thiophene-based C60 fullerene derivatives as efficient electron transporting materials for perovskite solar cells
Authors: Castro Edison , Fernandez-Delgado Olivia , Arslan Funda , Zavala Gerardo , Yang Tingyuan , Seetharaman Sairaman , D'Souza Francis , Echegoyen Luis
Published: July 2018

Devices based on the new fullerene derivatives exhibited an improved overall performance compared to those with PC61BM as the electron transporting material.
In situgold nanoparticle growth on polydopamine-coated 3D-printed scaffolds improves osteogenic differentiation for bone tissue engineering applications:in vitroandin vivostudies
Authors: Lee Sang Jin , Lee Hyo-Jung , Kim Sung-Yeol , Seok Ji Min , Lee Jun Hee , Kim Wan Doo , Kwon Il Keun , Park Shin-Young , Park Su A
Published: July 2018

In this study, we designed scaffolds coated with gold nanoparticles (GNPs) grown on a polydopamine (PDA) coating of a three-dimensional (3D) printed polycaprolactone (PCL) scaffold.
Extended photo-induced endosome-like structures in giant vesicles promoted by block-copolymer nanocarriers
Authors: Montis C. , Till U. , Vicendo P. , Roux C. , Mingotaud A.-F. , Violleau F. , Demazeau M. , Berti D. , Lonetti B.
Published: July 2018

Upon irradiation, the photosensitizer pheophorbide-a encapsulated in a copolymer nanocarrier causes dramatic morphological transitions in giant unilamellar lipid vesicles.
Harnessing magnetic dipole resonance in novel dielectric nanomaterials
Authors: Singh Haobijam Johnson , Ghosh Ambarish
Published: July 2018

All dielectric core–shell nanopillars with extremely tunable magnetic dipole resonance.
Controlled RAFT polymerization facilitated by a nanostructured enzyme mimic
Authors: Fu Qiang , Ranji-Burachaloo Hadi , Liu Min , McKenzie Thomas G. , Tan Shereen , Reyhani Amin , Nothling Mitchell D. , Dunstan Dave E. , Qiao Greg G.
Published: July 2018

A nanostructured MOF composite was utilized as an enzyme mimic for the generation of hydroxyl radicals from hydrogen peroxide, which can subsequently initiate RAFT polymerizations in aqueous or organic media.
An isothiourea-catalyzed asymmetric formal [4 + 2] cycloaddition of in situ generated azoalkenes with C1 ammonium enolates
Authors: Zhang Zi-Jing , Song Jin
Published: July 2018

An efficient isothiourea-catalyzed stereoselective formal [4 + 2] cycloaddition of α-chloro cyclic hydrazones with carboxylic acids has been developed.
Membrane partition of bis-(3-hydroxy-4-pyridinonato) zinc(ii) complexes revealed by molecular dynamics simulations
Authors: Coimbra João T. S. , Brás Natércia F. , Fernandes Pedro A. , Rangel Maria , Ramos Maria J.
Published: July 2018

The membrane partition of hydroxypyridinones and of zinc complexes explored by molecular dynamics.
Flake-like InVO4 modified TiO2 nanofibers with longer carrier lifetimes for visible-light photocatalysts
Authors: Zhou Yun , Liu Lixin , Wu Tao , Yuan Guolong , Li Junyu , Ding Qiujie , Qi Fugang , Zhu Wenjun , OuYang Xiaoping , Wang Yuan
Published: July 2018

TiO2/InVO4 nanofibers have been designed and fabricated successfully by one-pot electrospinning process, which display longer carrier lifetime (22 ns) and enhanced visible-light photocatalytic activity.
Complex formation constant of ferric ion with Gly, Pro-Hyp and Gly-Pro-Hyp
Authors: Zhi Mingyu , Li Yanan , Santoso Shella Permatasari , Chen Fangyuan , Huang Guangrong
Published: July 2018

Potentiometric titration to determine the complex formation constant of ferric ions with Gly, Pro-Hyp and Gly-Pro-Hyp.
The effect of the morpholinium ionic liquid anion on the catalytic activity of Rh (or Pt) complex–ionic liquid systems in hydrosilylation processes
Authors: Jankowska-Wajda Magdalena , Dąbek Izabela , Fiedorow Ryszard , Maciejewski Hieronim
Published: July 2018

Rhodium and platinum complexes were immobilized in morpholinium ionic liquids, the effect of which on the catalytic activity was determined.
ZrMOF nanoparticles as quenchers to conjugate DNA aptamers for target-induced bioimaging and photodynamic therapy
Authors: Liu Yuan , Hou Weijia , Xia Lian , Cui Cheng , Wan Shuo , Jiang Ying , Yang Yu , Wu Qiong , Qiu Liping , Tan Weihong
Published: July 2018

Aptamer conjugated porphyrinic metal–organic framework (MOF) achieved target-induced bioimaging and photodynamic therapy.
A study on the wetting properties of broccoli leaf surfaces and their time dependent self-healing after mechanical damage
Authors: Rich Benjamin B. , Pokroy Boaz
Published: July 2018

This paper reports the self-healing of broccoli leaves after mechanical damage; connecting recovery of surface roughness to the wetting properties.
A flexible comb electrode triboelectric–electret nanogenerator with separated microfibers for a self-powered position, motion direction and acceleration tracking sensor
Authors: Zhu Jianxiong , Guo Xiaoyu , Meng Dehuan , Cho Minkyu , Park Inkyu , Huang Run , Song Weixing
Published: July 2018

In this paper, we report a flexible comb electrode triboelectric–electret coupling nanogenerator using a separated friction microfiber object for self-powered position, motion direction and acceleration tracking sensing and its energy harvesting.
Role of the Mn substituent in Na3V2(PO4)3 for high-rate sodium storage
Authors: Park Jae-Sang , Kim Jongsoon , Jo Jae Hyeon , Myung Seung-Taek
Published: July 2018

C/NVMP allowed high electrochemical performance supported by the replace V by the Mn promoted the easier electron transfer through lower band gap energy than Mn-free NVP and carbon coating increase the electric conductivity up to 2 × 10−3 s cm−1, which led to superior electrode performance.
Efficient deep blue electroluminescence with CIEy ∈ (0.05–0.07) from phenanthroimidazole–acridine derivative hybrid fluorophores
Authors: Chen Shuo , Lian Jiarong , Wang Weigao , Jiang Yue , Wang Xuedong , Chen Shuming , Zeng Pengju , Peng Zhengchun
Published: July 2018

Non-doped OLEDs using phenanthroimidazole–acridine derivatives PhImAc and PhImEn were designed and fabricated. They display deep blue with the CIE (0.15, 0.07) and (0.15, 0.05).
LncRNA PROX1-AS1 promotes proliferation, invasion, and migration in papillary thyroid carcinoma
Authors: Shen Yanyan , Xia Erjie , Bhandari Adheesh , Wang Xiaohui , Guo Guilong
Published: July 2018

Evidence has been provided that long noncoding RNAs (LncRNAs) play major roles in affecting essential physiological processes, and many of which seem to have functional roles in tumorigenesis and progression. However, the intrinsic molecular mechanism of LncRNAs acting on papillary thyroid carcinoma is not well understood. In the present study, we found that PROX1-AS1 levels were obviously increased in thyroid cancer cells compared with the normal thyroid epithelial cells. Knockdown of PROX1-AS1 gene expression by siRNA could inhibit cell proliferation. Subsequently, we also observed that silencing PROX1-AS1 might inhibit invasion and migration of thyroid cancer cell lines via modulating the expression of epithelial–mesenchymal transition related proteins. In conclusion, our study indicated that LncRNA PROX1-AS1 could promote papillary thyroid carcinoma development and might serve as a potential targeting marker for papillary thyroid carcinoma.
Towards automated statistical partial discharge source classification using pattern recognition techniques
Authors: Janani Hamed , Kordi Behzad
Published: July 2018

This study presents a comprehensive review of the automated classification in partial discharge (PD) source identification and probabilistic interpretation of the classification results based on the relationship between the variation of the phase‐resolved PD (PRPD) patterns and the source of the PD. The proposed automated classification system consists of modern, high‐performance statistical feature extraction methods and classifier algorithms. Their application in online monitoring and recognition of the PD patterns is investigated based on their low‐processing time and high‐performance evaluation. The application of modern statistical algorithms and pre‐processing methods configured in this automated classification system improves the pattern recognition accuracy of the different PD sources that are suitable to be employed in different high‐voltage (HV) insulation media. To evaluate the performance of the different combinations of the feature extraction/classier pairs, laboratory setups are designed and built that simulate various types of PDs. The test cells include three sources of PD in , two sources of PD in transformer oil, and corona in the air. Data samples for different classes of PD sources are captured under two levels of voltage and two different levels of noise. The results of this study evaluate the suitability of the proposed classification systems for probabilistic source identification in various insulation media. Furthermore, of importance to the problem of the PD source identification is to assign a ‘degree of membership’ to each PRPD pattern, besides assigning a class label to it. Some of the classifier algorithms studied in this study, such as fuzzy classifiers, are not only able to show high classification accuracy rate, but they also calculate the ‘degree of membership’ of a sample to a class of data. This enables probabilistic interpretation of a new PRPD pattern that is being classified. The determination of the degree of membership for future PRPD samples allows safer decision making based on the risk associated with the different sources of PD in HV apparatus.
Change detection in Landsat images based on local neighbourhood information
Authors: Gupta Neha , Pillai Gargi V. , Ari Samit
Published: July 2018

In this study, a novel technique is proposed to detect the changes in bitemporal multispectral images. Utilisation of the local neighbourhood information in any image processing task may provide good noise immunity and reduces false alarms. Motivated by this, Otsu's thresholding of local information based approach is proposed in this work. It shows the effective performance in change detection of bitemporal Landsat images which suffer from different atmospheric and sunlight conditions. To get the local information around each pixel, both bitemporal images are partitioned into overlapping image blocks. Every block of the first image is concatenated with the corresponding block of the second image for each pixel position. Thus, the information of the concatenated block is considered as inter‐block information. Further, Otsu's method is applied on the concatenated block for threshold calculation. Depending on the threshold, binary values are generated. Finally, binary values of both images for all bands are compared by XOR operation to detect it as the background i.e. unchanged pixel or foreground i.e. changed pixel. On the basis of majority class present in XOR output, binary change map is generated. Experiments conducted on Landsat images show that the proposed method provides better performance compared to reported techniques.
Collaborative demand response in smart electric grid with virtual system operator
Authors: Yammani Chandrasekhar , Prabhat Pankaj
Published: July 2018

The authors present a novel concept of virtual system operator (VSO) and its mechanism. This mechanism aims to determine load consumption pattern on day‐ahead basis which suits all the involved entities individually in real‐time pricing environment. The demand profile is scheduled by every consumer by performing demand response (DR) without having to coordinate with other consumers in the system. In the process flow, the VSO which remains in communication with the system operator and the consumer relays information regarding day‐ahead electricity tariff to consumers. Based on which the consumers simultaneously perform DR to optimise their electricity bill and forward the schedule to the VSO. This process repeats iteratively until a balanced price profile as well as load schedule is established in the system. Such schedules are capable of reducing dynamics in the electricity market. The proposed concept is demonstrated through three different types of consumers. These consumers realise DR through different objective functions and up to different extents. Ultimately, the load schedules are obtained for all individual users and corresponding price profile which suits every entity of the system.
First core properties: from low- to high-mass star formation
Authors: Bhandare Asmita , Kuiper Rolf , Henning Thomas , Fendt Christian , Marleau Gabriel-Dominique , Kölligan Anders
Published: July 2018

Aims. In this study, the main goal is to understand the molecular cloud core collapse through the stages of first and second hydrostatic core formation. We investigate the properties of Larsons first and second cores following the evolution of the molecular cloud core until the formation of Larson’s cores. We expand these collapse studies for the first time to span a wide range of initial cloud masses from 0.5 to 100 M⊙.

Methods. Understanding the complexity of the numerous physical processes involved in the very early stages of star formation requires detailed thermodynamical modelling in terms of radiation transport and phase transitions. For this we used a realistic gas equation of state via a density- and temperature-dependent adiabatic index and mean molecular weight to model the phase transitions. We used a grey treatment of radiative transfer coupled with hydrodynamics to simulate Larsons collapse in spherical symmetry.

Results. We reveal a dependence of a variety of first core properties on the initial cloud mass. The first core radius and mass increase from the low-mass to intermediate-mass regime and decrease from the intermediate-mass to high-mass regime. The lifetime of first cores strongly decreases towards the intermediate- and high-mass regimes.

Conclusions. Our studies show the presence of a transition region in the intermediate-mass regime. Low-mass protostars tend to evolve through two distinct stages of formation that are related to the first and second hydrostatic cores. In contrast, in the high-mass star formation regime, collapsing cloud cores rapidly evolve through the first collapse phase and essentially immediately form Larson’s second cores.
An Investigation of the Bacterial Influence of Acidithiobacillus Thiooxidans on Concrete Composites
Authors: Harbulakova Vlasta Ondrejka , Estokova Adriana , Luptakova Alena
Published: July 2018

Vegetation and microorganisms present the biological factors that deteriorate concrete. These problems are very visible in places like sewage, underground and hydraulic structures, chemical plants, industrial structures, liquid-containing structures, agricultural structures or marine environments. The most significant biodeteriogens are the sulphur-oxidising bacteria Acidithiobacillus thiooxidans (A. thiooxidans) and the sulphatereducing bacteria (Desulfovibrio spp.) that are responsible for the so-called sulphuretum consortium. Microorganisms that produce sulphuric acid accelerate the deterioration of concrete sewer pipes in a process termed Microbially Induced Concrete Corrosion (MIC). The paper considers the assessment of the release of calcium and silicon from concrete composites with and without coal fly ash by sulphur-oxidizing bacteria. The concrete mixture contained coal fly ash as 5 wt. % and wt. 10 % cement replacement. Prepared composites were exposed to an aggressive microbial environment under laboratory conditions for 3 months. The pH values were measured and studied during this time period. A different resistance against MIC was observed for the concrete composites of different compositions. The highest amount of calcium leached-out from the concrete was in the case of the composites where 10 % cement was replaced by fly ash.
The problem of stabilization of landslides in glaciotectonically disturbed areas. Case study: road engineering structure
Authors: Kołodziejczyk Urszula , Kostecki Jakub , Gontaszewska-Piekarz Agnieszka , Wysokowski Adam
Published: July 2018

The process of the construction of engineering structures situated within glacitectonically disturbed areas cause the necessity to link engineering operation with knowledge of geological processes. One of the examples of such a structure was the construction of the west bypass of Zielona Góra. The roadworks were connected with the necessity of deep excavations into glacitectonically disturbed soil structures. This caused intense changes in the soil mass and - as a consequence - loss of slope stability and the construction of landslides. At the construction stage numerous landslides were already active, which additionally increased during intensive road use. In spite of technical stabilization, there was a risk of loss of slope stability, which is a consequence of stresses in soil mass and engineering activity. This article presents the results of the monitoring of the slope stability during intensive road exploitation.
The influence of building and installation conditions on shaping the optimal conditions of room microclimate
Authors: Kurowski Krystian
Published: July 2018

We expect comfortable conditions when staying in a room for a long period of time. Architectural and constructional conditions (including, in particular, thermal parameters, or radiation transmittance - for transparent elements), and installations in confrontation with external conditions shape the microclimate of rooms. The standards and trends in the development of construction technologies, especially in terms of energy efficiency, equipment and installation systems, the role and the parameters of comfort in the rooms of contemporary solutions have been presented. The classic technologies of boilers (including solid fuel) and natural ventilation are presented. Technologies regarding modern boilers are discussed, both on conventional fuels and biomass, heat pumps, ventilation units, as well as installation systems in terms of energy, ecology and economy. The microclimate parameters were analysed, which shape the comfort and possibilities of influencing them with a construction and installation technique. The paper presents partial results from the conducted research on the impact of weather conditions, thermal protection and building installation solutions on shaping the parameters of the internal environment.
The application of natural zeolite to cement concrete intended for communications surfaces
Authors: Linek Małgorzata , Żebrowski Wojciech , Wolka Paweł
Published: July 2018

The article presents the application of a cement substitute in the form of natural zeolite to cement concrete. The reference mix design intended for communications surfaces and a mix of modified composition taking into consideration zeolite content were prepared. The basic parameters of concrete mix components were specified, including basalt aggregate, cement and zeolite. The influence of the applied zeolite of a grain-size distribution up to 50μm on the obtained parameters of concrete mix and hardened concrete was determined. It was observed that the applied zeolite contributes to the modification of the internal structure of concrete composite and consequently to the increase of the mechanical and physical parameters of hardened concrete tested within diversified standard periods of time. Due to the fact that the resistance of concrete to cyclic freezing and thawing is the determinant of concrete durability, in the case of pavement structure, hardened concretes were subject to a frost resistance assessment. The influence of zeolite content on both internal and external frost resistance of hardened concrete was specified. SEM observations of the internal structure of concretes exposed to the influence of freezingthawing cycles proved the advantageous changes of zeolite occurrence in concrete mix. A reduction of cement quantity and its replacement thereof with the suggested zeolite allows obtaining a pavement quality concrete of a more favourable internal micro structure and distinguished by higher parameters.
Radiological assessment of radionuclide contents in soils in Lower Silesian Voivodeship in the years 1988-2014
Authors: Łukaszek-Chmielewska Aneta , Stawarz Olga , Isajenko Krzysztof , Piotrowska Barbara , Girard Martin
Published: July 2018

Abstract. In 1986, the Chernobyl disaster provoked the uncontrolled release of significant amounts of radioactive substances, which caused surface contamination in Poland through radioactive isotopes. The most affected areas are Opole Voivodeship and part of Lower Silesian Voivoideship. Unfavorable meteorological conditions consisting of strong winds blowing from Chernobyl and local heavy rains favored the spread of a radioactive cloud, its shifting towards Poland and the accumulation of artificial isotopes in the soils of those regions [1]. Samples of the soils surface layers (0 - 10 cm) collected in different regions of Lower Silesian Voivodeship during the period 1988 - 2014 were studied. Changes in concentrations over time were analyzed for the following natural and artificial radionuclides: cesium (137Cs and 134Cs), potassium (40K), radium (226Ra) and actinium (228Ac). Since the disaster, the concentration of 137Cs in the surface layer decreased continuously over time. The mean concentration of 137Cs in the surface layer in Lower Silesian Voivodeship in 2014 was 1.46 kBq/m2, higher than the mean concentration for the whole Poland at 1.33 kBq/m2 [2]. Mean concentrations of other natural radionuclide such as 226Ra, 228Ac and 40K in the soils of Lower Silesian Voivodeship were also found to be higher than for the whole Poland [2].
The Monitoring of selected sources in the administration of the Forests of Brno
Authors: Marková Jana , Pelikán Petr , Šlezingr Miloslav
Published: July 2018

The article concerns the monitoring of selected sources (monitored a total of 10 springs, presented the results of 5 springs) administered by the Forests of the city of Brno in the northern district of Brno-county, describing their current state, including the evaluation of selected water quality parameters. The basis of the study was to measure basic water quality parameters (water temperature, pH, oxygen and measuring the rate of flow of water in springs) and sampling for laboratory analysis. The values obtained were tabulated and graphically evaluated and compared with values in accordance with Decree no. 252/2004 Coll., which lay down the hygienic requirements for drinking water. Based on the measured values charts and graphs were compiled, and the water quality of the individual strands were assessed. The overall condition of wells and their surroundings is described in detail and assessed.
Analysis of the heat and smoke release rate of selected undergrowth types
Authors: Półka Marzena
Published: July 2018

The paper presents the results of tests conducted regarding the flammability and heat release rate (HRR) of selected forest leaf litter under the impact of assumed flux density taking place in fire conditions. Litter samples for testing needs were collected from places characterised by similar biotope parameters. They were collected from 4 types of tree stands: from a cluster of pine trees, beech trees, spruce trees and oak trees. The highest HRRmax values were obtained during the testing of the spruce litter sample at a thermal exposure of 50 kW/m2. This suggests, that as compared to the remaining litter types being tested, this litter released the greatest amount of heat in the given time unit and has an evident impact on the rate and magnitude of a forest fire and in an indirect way on the ignition of subsequent leaf litter in adjacent forest zones.
Methods for reducing low emissions from heating devices in single- family housing
Authors: Proszak-Miąsik Danuta , Rabczak Sławomir
Published: July 2018

By low emission, we mean the pollution of the lower troposphere from emitters not exceeding 50 m in height and most often located at a level of 10 m in height. Due to such emitters the altitude this pollution accumulates around is its place of emission. The basic source of low emissions in Poland are pollutants caused by vehicular traffic and during the process of burning low quality coal, and rubbish - in domestic furnaces. The reason is the lack of proper filtrtation in these devices. Most air pollutants are gaseous substances. The second group is dust. Contamination is different in physical and chemical terms. The most dangerous for people and the environment are: dioxins, polycyclic aromatic hydrocarbons (benzopyrene), carbon monoxide, sulfur dioxide, nitrogen oxides, heavy metals (eg cadmium, manganese, chromium), and hydrogen cyanide. The largest increase in suspended particulates during the heating season affects a majority of single-family housing estates, due to the lack of system heat. It is a fact that many users have antiquated coal furnaces in which low-quality coal and sometimes waste is burned, for example, colored press, rubber, plastics, and impregnated wood. Unfavorable weather conditions during the heating season intensify this phenomenon which is known as smog. This publication is aimed at presenting methods for reducing the emission of pollutants into the air due to the combustion of inadequate fuel in areas of low residential buildings. The solutions, based on the replacement of fifth-generation furnaces as well as a change of fuel, have been proposed.
Damage to plastic pipelines and its consequences
Authors: Nienartowicz Beata , Przybyła Bogdan
Published: July 2018

The paper will present the issue of damage to plastic pipelines - especially thermoplastic ones, while also considering the aspect of testing their technical condition using standard diagnostic tools. The results of the strength analysis for the effects of local overheating of the sewage pipe wall - as an effect of inflow of sewage with a high temperature, will also be presented.
Research on the effectiveness of individual infiltration devices
Authors: Suchanek-Gabzdyl Ewa , Mrowiec Maciej
Published: July 2018

The increasing urbanization process in Europe has resulted in an increase in the proportion of impervious areas in the development of watersheds. This fact, combined with the more frequent occurrence of volatile rainfall, contributes to the formation of high intensity surface runoff, which results in local flooding of the lowest located areas. Water runoff also causes a large amount of pollution from the catchment to be flushed away and transported to the receiver, which generates many negative effects on the environment. Due to these unfavorable changes in the urban catchment, it is necessary to manage the waters in accordance with the principles of sustainable development. One of the basic tools to protect the quantity and quality of water discharged from the catchment area is to take into account the need to implement technical solutions to increase the retention of rainwater in cities. Such solutions, consisting of designing natural rainwater management systems, could work independently or in cooperation with traditional rainwater drainage systems [1].
Direct Electricity Production From Coconut Oil - The Electrooxidation Of Coconut Oil In An Acid Electrolyte
Authors: Włodarczyk Paweł P. , Włodarczyk Barbara , Kalinichenko Antonina
Published: July 2018

Supplying more and more energy is an essential task of today's energy industry. In the last few decades, in addition to traditional methods of energy production, alternative energy sources have been developing at a fast rate. One of the devices that can use these sources is the fuel cell (FC). FCs can be a power source of the future mainly due to their high efficiency, their low impact on the environment and the possibility of powering with different fuels. Most often, FCs are powered by hydrogen. However, issues with its cheap production and storage are the reasons for seeking new fuels for FCs. Yet it must be a fuel that will provide a zero or low emission level. One of these fuels can be vegetable oil. The paper presents the measurements for the electrooxidation of coconut oil emulsion on a platinum electrode (with smooth surfaces). The electrooxidation was performed in an aqueous solution of H2SO4. Electrochemical measurements were performed in a glass cell with three electrodes. The obtained maximum current density was equal to 21 mA/cm2. Therefore, there is a fundamental possibility of direct electricity production from coconut oil with acid electrolyte.
An innovative system for the acquisition and analysis of energy and utilities consumption data dedicated to smart energy cities
Authors: Ziembicki Piotr
Published: July 2018

Buildings in Poland are very energy-consuming, especially during their exploitation. As a result, there is a need for establishing new systems and technologies which could increase energy efficiency in this sector. One of the most important reasons is the lack of technologies and systems dedicated to managing energy and utilities for buildings or building compounds in urban areas. Wide implementation of these kinds of systems, which will operate based on measured on-line data, will ensure a decrease in energy and utilities consumption. At the beginning of the paper, some basic demands of exploitation data acquisition systems are described. The specifics of energy and utilities consumption data are presented. In the main body of the paper, a conception of an innovative system for the acquisition and analysis of energy and utilities consumption data dedicated for buildings is presented, which makes it possible to decrease heat, energy and utilities consumption in urban areas. Some basic systemic assumptions are presented and fundamental technical aspects are described. In addition, the essential assumptions of data analysis algorithms are described in the article.
An assessment of the quality and use of rainwater as the basis for sustainable water management in suburban areas
Authors: Zdeb Monika , Papciak Dorota , Zamorska Justyna
Published: July 2018

A common economic use of rainwater is the basis for strategies that will allow the water sector to adapt to progressive climate change. Rainwater is a basic part of water resources that ensures the renewal of the surface and groundwater, therefore they should be protected against pollution and be managed and used in places of rainfall. This is particularly true for heavily urbanized, agricultural and industrial areas. Stormwater collection and storage systems have been introduced in many countries [1]. The water obtained in this way is a valuable source of fresh water, thanks to which it is possible to reduce the demand for tap water by almost 60% or use it during periods of drought [1, 2]. The idea of the sustainable management of water resources and the increasing ecological consciousness of society have allowed installations for the collection and use of rainwater in residential houses and public buildings to become an increasingly popular phenomenon [3, 4]. The research and assessment of rainwater quality is a guarantee of safety for its users. The article presents the results of research on the physical and chemical quality of rainwater collected directly from precipitation. Samples for research were collected in a suburban area during March-November 2015. The pH, turbidity, permanganate index, OWO, nitrogen compounds, phosphates, oxygen content, acidity, basicity, conductivity, hardness, and heavy metals content were determined. The obtained results were the basis for indicating the possibility of using rainwater for various economic purposes.
Mode choice analysis using discrete choice model from transport user (Case study: Jakarta LRT, Indonesia)
Authors: Novi Wulansari Dwi , Dwi Astari Milla
Published: July 2018

Jakarta Light Rail Transit (Jakarta LRT) has been planned to be built as one of mass rail-based public transportation system in DKI Jakarta. The objective of this paper is to obtain a mode choice models that can explain the probability of choosing Jakarta LRT, and to estimate the sensitivity of mode choice if the attribute changes. Analysis of the research conducted by using discrete choice models approach to the behavior of individuals. Choice modes were observed between 1) Jakarta LRT and TransJakarta Bus, 2) Jakarta LRT and KRL-Commuter Jabodetabek. Mode choice model used is the Binomial Logit Model. The research data obtained through Stated Preference (SP) techniques. The model using the attribute influences such as tariff, travel time, headway and walking time. The models obtained are reliable and validated. Based on the results of the analysis shows that the most sensitive attributes affect the mode choice model is the tariff.
Effect of type of road humps on vehicular speeds on residential roads
Authors: Suryo Putranto Leksmono , Kurniawan Kevin
Published: July 2018

To reduce potential pedestrian fatalities, in residential road maximum speed is 30km/hour. Apart from installing maximum speed signs, installing road humps may ensure speed reduction. This paper is intended to compare light vehicles and motorcycles speeds and speeds reductions due to road humps. Data collection was done in Modernland, Tanggerang City. Two road segments were observed, i.e. segments with standard and non-standard road humps. Observation was made in morning, noon and afternoon periods. A portable speed gun was used to measure the speed at about 50m and 25m before the road humps. Some mean difference statistical analyses were conducted for both speeds and speeds differences between different type of road humps and between pairs of observation periods. The 0.05 significant level was used. Surprisingly, mean of speeds differences (50m vs 25m) in standard road hump is significantly higher than in non-standard road hump.
On street parking and its impact on road performance
Authors: Sulistyono Sonya , Sulistio Harnen , Djakfar Ludfi , Wicaksono Achmad , Endah Badriani Ririn
Published: July 2018

Commercial areas have a high economic and parking activity. High parking activity that is not comparable to the availability of parking facilities and it can interfere with the performance of the road. This study based on congestion caused by activities on-street parking on Gajah Mada St., Rambipuji, Jember. This road broadness reduced because on street parking and disrupting the flow of traffic. From the survey on Thursday, March 5, 2015 obtained the following results: performance comparison roads with and without on-street parking shows capacity has increased 25%, DS decreased 25%, and the speed has increased 11%. Characteristics of the road parking for MC, LV and HV in order are: volume parking 257 vehicles, 62 vehicles, and 10 vehicles. Accumulated parking 46 veh/h, 20 veh/h, and 5 veh/h. Turn over parking 0,0997 veh/SRP/h, 0,4588 veh/SRP/h, and 1,0940 veh/SRP/h. Parking index of 0,27, 2,22, and 8,20.
Identification of feeder service in every station on serving Jenggala Train
Authors: Widyastuti Hera , Hananda Ziantono Dio , de Jesus Babo Frans , Amijaya Jimi , Zafikhal Biad Sektyoko Rizal
Published: July 2018

Optimum performance of station affects on the level of service to the consumer that is train service users. The consumers of station or train always want to have appropriate services, from purchasing ticket in ticket counter until waiting for the train to board or arrive. But, based on earlier research, there were still much candidate of passengers looking for information about transportation upon arrival on the station. The purpose of the writing is to evaluate performance and get hints to make some improvements. While, for intermodal analysis of whole railway stations serving KRD Jenggala has been integrated with nearby terminal through the service of feeder that is Lyn.