bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of primary reference measurement procedures for food quality control
Authors: Medvedevskikh Sergey V , Medvedevskikh Maria Y , Sergeeva Anna S , Baranovskaya Vasilisa B. 
Published: December 2019

Abstract
The work is about the development of primary reference measurement procedures for food quality control based on the methods of gravimetry, butymetry, photometry, chromatography, spectrometry and others.
Improvement of the reference material planning mechanism for the provision of the necessary nomenclature of various areas of the Russian economy
Authors: Sobina Egor P , Medvedevskikh Sergey V , Kremleva Olga N 
Published: December 2019

Abstract
The paper is about necessity of making organizational decisions, creation of publicly available RM nomenclature planning systems with the involvement of experts, integration into Programs of various level on the measures of state support of developed lists of RMs in Russia. Creation of these lists is necessary to ensure uniformity of measurements in the areas of state regulation in Russia.
CEN standard “Harmonized counting of atmospheric ultrafine particles” and UFP monitoring initiatives in Europe
Authors: Bustin Lucia , Tritscher Torsten , Spielvogel Jürgen , Bischof Oliver F. , Scheckman Jacob , Krinke Thomas 
Published: December 2019

Abstract
The paper is devoted the standard CEN/TS 16976 described a standardized measuring method with number concentration of UFP. As well as, described TSI 3750-CEN CPC which meet all of these requirements.
Dosimetric system on the basis of EPR-spectroscopy with use state primary standards of power of the absorbed dose and Standard of number of the paramagnetic centers
Authors: Leskov A S , Kuvykina M B , Tenishev V P 
Published: December 2019

Abstract
This paper presents an overview of the current state of ensuring the measurement uniformity of absorbed dose of ionizing radiation during the treatment of food and agricultural products in Russia. The way of measuring the absorbed dose of ionizing radiation in the range of absorbed doses up to 1 kGy with Primary State Standard GET209-2014 and GET83-2017 is proposed.
Questions of metrological support for bioanalysis. Catalytic activity of enzymes
Authors: Kulyabina E V , Kulyabina T V , Morozova V V , Melkova O N , Guskova E A 
Published: December 2019

Abstract
The relevance of metrological support of measurements carried out in laboratory medicine is examined to increase the accuracy of analyzes results, namely, measurements of the catalytic concentration of the human body enzymes. The development of reference materials with a long shelf life is discussed. The results of the development of Russian reference materials of the catalytic concentration of α-amylase and alkaline phosphatase are discussed. Based on the measuring model (Beer-Lambert-Bouguer law), sources of uncertainty are established. The developed reference materials make it possible to measure the catalytic concentration of enzymes with high reliability, make the correct diagnoses at the early stages of the disease, and make it possible to achieve the world level of metrological support of laboratory medicine in the field of measuring enzyme parameters.
Results of research of transfer measurement standards in the form of pure substances
Authors: Migal Pavel V 
Published: December 2019

Abstract
The paper presents the summarized results of the development of transfer measurement standards in the form of pure substances and the methods of transferring units, characterizing chemical composition from transfer measurement standards to routine measurements with the use of reference materials. The work was performed in the framework of the research project “Purity” and experimental project “Purity2b”.
X-ray absorption spectral analysis of heavy metals with Si-PIN detectors
Authors: Osadchii S M , Petukhov A A , Dunin V B 
Published: December 2019

Abstract
An X-ray absorption spectroscopy method for the detection of heavy metals at the K-absorption edges is implemented using the designed Si-PIN detector. The limits of detection of heavy metals and uncertainty of measurement are estimated by the results of measurements of the thickness of gold and lead foil.
Nanoparticle concentration in engine emissions
Authors: Belenkii D I , Magomedov T M , Balakhanov D M 
Published: December 2019

Abstract
Nanoparticles arising during the operation of the internal combustion engine are dangerous for human health, as they easily penetrate the body through the respiratory tract. Nanoaerosol in car exhaust gases is a complex mixture of different components, often having a polydisperse size distribution of particles, most of which are from 5 to 100 nm. In Europe, since 2008, the Regulation establishes limits of the mass concentration and the counting concentration of nanoparticles in engine emissions (European Commission, Commission Regulation No. 692/2008), however, there is no such Regulation in Russian Federation, which in turn leads to the deterioration of the environmental situation and people health.
Singularity of GOST R 57165 and GOST 31870 applications to determine of lithium
Authors: Volkov P A , Belus S K , Retivov V M , Zhavoronkov V V 
Published: December 2019

Abstract
The authors propose changes to existing standards GOST К 57165 and GOST 31870 in part of sample preparation for analysis on determining the lithium content in water by atomic emission spectrometry with inductively coupled plasma (AES-ICP)
Development of the Certified Reference Materials in the field of physical and chemical analysis. Reference Materials of the composition of aqueous solutions of yttrium and scandium ions
Authors: Ermakova I I , Ivanov A V , Ziablikova I N , Shobina A N 
Published: December 2019

Abstract
In this work is described to study on rare-earth elements scandium and yttrium were, the development of certified reference materials of aqueous solutions of yttrium and scandium ions.
Reference materials for inductively coupled plasma methods (ICP standards) produced by VNIIFTRI
Authors: Stolboushkina T P , Stakheev A A 
Published: December 2019

Abstract
For the metrological assurance of the high-precision inductively coupled plasma methods, the Russian Metrological Institute of Technical Physics and Radio Engineering (VNIIFTRI) developed four types of certified reference materials (CRMs) of the mass fraction of metals in solutions (ICP CRM). The permissible certified values of the element mass fraction (mass concentration) in the developed ICP CRM range from 800 mg/kg to 1200 mg/kg (from 800 mg/dm3 to 1200 mg/dm3). The developed ICP CRMs can be used for ensuring the metrological traceability of measurements in inorganic analyses to the State Primary Standard for units of the mass fraction and mass (molar) concentration of inorganic components in aqueous solutions based on gravimetric and spectral methods GET 217-2018.
Exposure to cold temperature affects the spring phenology of Alaskan deciduous vegetation types
Authors: Shi Mingjie , Parazoo Nicholas C , Jeong Su-Jong , Birch Leah , Lawrence Peter , Euskirchen Eugenie S , Miller Charles E 
Published: December 2019

Abstract
Temperature is a dominant factor driving arctic and boreal ecosystem phenology, including leaf budburst and gross primary production (GPP) onset in Alaskan spring. Previous studies hypothesized that both accumulated growing degree day (GDD) and cold temperature (chilling) exposure are important to leaf budburst. We test this hypothesis by combining both satellite and aircraft vegetation measurements with the Community Land Model Version 4.5 (CLM), in which the end of plant dormancy depends on thermal conditions (i.e. GDD). We study the sensitivity of GPP onset of different Alaskan deciduous vegetation types to a GDD model with chilling requirement (GC model) included. The default CLM simulations have a 1–12 d earlier day of year GPP onset over Alaska vegetated regions compared to satellite constrained estimates from the Polar Vegetation Photosynthesis and Respiration Model. Integrating a GC model into CLM shifts the phase and amplitude of GPP. During 2007–2016, mean GPP onset is postponed by 5 ± 7, 4 ± 8, and 1 ± 6 d over Alaskan northern tundra, shrub, and forest, respectively. The GC model has the greatest impact during warm springs, which is critical for predicting phenology response to future warming. Overall, spring GPP high bias is reduced by 10%. Thus, including chilling requirement in thermal forcing models improves northern high-latitude phenology, but leads to other impacts during the growing season which require further investigation.
Time-evolution of nonlinear optomechanical systems: interplay of mechanical squeezing and non-Gaussianity
Authors: Qvarfort Sofia , Serafini Alessio , Xuereb André , Braun Daniel , Rätzel Dennis , Bruschi David Edward 
Published: December 2019

Abstract
We solve the time evolution of a nonlinear optomechanical Hamiltonian with arbitrary time-dependent mechanical displacement, mechanical single-mode squeezing and a time-dependent optomechanical coupling up to the solution of two second-order differential equations. The solution is based on identifying a minimal and finite Lie algebra that generates the time-evolution of the system. This reduces the problem to considering a finite set of coupled ordinary differential equations of real functions. To demonstrate the applicability of our method, we compute the degree of non-Gaussianity of the time-evolved state of the system by means of a measure based on the relative entropy of the non-Gaussian state and its closest Gaussian reference state. We find that the addition of a constant mechanical squeezing term to the standard optomechanical Hamiltonian generally decreases the overall non-Gaussian character of the state. For sinusoidally modulated squeezing, the two second-order differential equations mentioned above take the form of the Mathieu equation. We derive perturbative solutions for a small squeezing amplitude at parametric resonance and show that they correspond to the rotating-wave approximation at times larger than the scale set by the mechanical frequency. We find that the non-Gaussianity of the state increases with both time and the squeezing parameter in this specific regime.
Invasive Aquatic Plant Species of Chenderoh Reservoir, Malaysia and Jatiluhur Reservoir, Indonesia
Authors: Ismail S N , Subehi L , Mansor A , Mashhor M 
Published: December 2019

Abstract
The sampling was carried out in two sampling sites; Chenderoh Reservoir, Malaysia and Jatiluhur Reservoir, Indonesia. These reservoirs are the initial of cascade reservoirs on Perak River and Citarum River. The aquatic plants distribution and abundance were recorded, and water quality parameters were measured. A total of 23 aquatic plant species from 14 families were identified. The populations of water hyacinth (Eichhornia crassipes) and giant salvinia (Salvinia molesta) were recorded in all sampling points of both reservoirs. Based on the TSI (Chl a), Chenderoh Reservoir was subjected to a mesotrophic, whereas, Jatiluhur Reservoir was subjected to an eutrophic reservoir. E. crassipes and S. molesta which were abundant in those reservoirs were listed in the 100 world worst invasive alien species.
The River Basin Spatial Informative Nesting (E-BASIN) framework as an alternative approach for flood disaster management
Authors: Izham M Y , Aznarahayu R , Nurul Azni M A , Norashila M N 
Published: December 2019

Abstract
The usage of technology is vital towards flood management. It helps on delivering the information on disasters occurred in the affected areas. Heavy rainfall and flood disaster occur frequently in Malaysia during the monsoon seasons. This causes significant impact towards human life, loss of properties and damage to the surrounding environment. The requirement on effective flood disaster management within river basin boundaries has become a necessity by managing the weather records, simulating present and future flood events; and providing best approach of reducing flood impact assessment before, during and after. This article aims to propose a new framework in flood disaster management as an alternative way to disseminate flood events, namely E-Basin framework. E-Basin is designed via “light and easy” approach to visualise, alert and report flood events among affected local residents, societies and related agencies situated in flood-prone areas. The implementation of E-Basin framework could provide further guideline among the involved agencies for improving effectiveness of flood disaster management geographically in the 4th Industrial Revolution era.
Bacterial indicators reveal water quality status of Rangkui River, Bangka Island, Indonesia
Authors: Maghfiroh Miratul , Novianti Heni , Lukman  , Nurtjahya Eddy 
Published: December 2019

Abstract
Rangkui River flows across Pangkal Pinang City, the capital of Bangka Belitung Province. Land uses vary and can inevitably be pollution hot-spots for this river. This study aimed to investigate the current status of Rangkui River based on bacterial indicators in association with other water quality parameters. The sample collection was completed in March 2017 within 6 stations. Water quality parameters observed were temperature, TSS, turbidity, pH, DO, salinity, BOD, COD, Nitrate and Phosphate. The results of faecal coliform observation indicated that the stations closer to upstream (station 1, 2, 3) showed lower faecal coliform concentration (530-940 MPN/100 ml) as compared to those closer to downstream (station 4, 5, 6) which had the amount of ∼11,000 MPN/100 ml. Phylogenetic study emphasized that isolates of interest were more similar to Escherichia group. The water from Rangkui River could be classified from Class I to Class IV according to Indonesia Government Regulation No.82/2001. PCA revealed Station 3 and 6 obviously separated from other stations so that more concerns should be given to improving water quality in these areas.
Bifurcation analysis of the prey-predator models incorporating herd behaviours
Authors: Manaf Z I A , Mohd M H 
Published: December 2019

Abstract
In ecology, herd behaviour corresponds to the situation how a group of animals of the same species interacts in the time of danger. A herd mechanism offers more protection for preys against predators. But this mechanism can also provide defence from predators. To address this problem, we consider two ecological models of prey-predator interactions with the presence of different herd behaviours. While the first system represents a simple prey-predator model incorporating herd behaviour in prey populations only, the second one considers the herd behaviour in both prey and predator populations. We examine how different strategies of herd behaviours can determine the outcomes of species interactions. To do this, we employ stability analysis and numerical simulations to illustrate different dynamical behaviours of the two models, e.g. coexistence and extinction steady states and also limit cycles. By using bifurcation analysis, we observe the occurrences of Hopf bifurcation, transcritical bifurcation, limit point and limit point of cycles. These bifurcations can shape the overall dynamics of these two ecological systems.
Population structure and gonadal maturity stage of endemic and alien fish dominant species in Lake Matano, South Sulawesi
Authors: Nasution SH , Dina R 
Published: December 2019

Abstract
Lake Matano, one of the lakes in the Malili Lake complex, is located in East Luwu District, South Sulawesi Province. Lake Matano is an ancient lake that is very deep with high biota and endemicity, including fish. The dominant endemic fish found on Lake Matano is Telmatherina antoniae. At present, dominant alien fish which is Louhan fish is also found at this site. This paper aims to convey the latest information regarding population structure of the dominant endemic and alien fish in Lake Matano, namely relative abundance distribution, size structure (length and weight), growth patterns and gonadal maturity stages. Sampling was carried out in May and August 2016 at five stations. Fish were caught using gill nets with seven mesh sizes and installed for at least two hours. The relative abundance of fish at each station is determined based on the average of catch per unit effort, namely the number of fish caught per hour of gillnet installation(ind/hour), with growth pattern determined based on the length weight relationship, and the stage of gonadal maturity determined morphologically. Telmatherina antoniae and Louhan were found at all stations with the highest relative abundance in MT4 (Petea) and MT2 (Nuha), respectively. The length of T. antoaniae ranged from 64 to 105 mm (82.24 ± 0.61 mm) and weight 2.3 to 11 grams (5.62 ± 0.14 mm). The length of Louhan ranged from 51 to 185 mm (96.42 ± 3.36 mm) and weight from 2.5 to 102.6 grams (21.66 ± 2.36 grams). In May and August both T. antoniae and Louhan were found with gonadal maturity stage I to IV.
Characterisation of allelochemical compounds signature in two mangrove forest species of Rhizophora apiculata and Acrostichum aureum and potential in suppressing weed growth
Authors: Othman Rashidi , Ramya Razanah , Mohd Hassan Norazian , Masyitah Wan Daud Wan , Nadia Johari Nursyafica 
Published: December 2019

Abstract

Rhizophora apiculata and Acrostichum aureum are a common mangrove species in Malaysia. Allelochemical interaction of the mangrove species was speculated to play an important role in dominance in the harsh mangrove environment. This study assessed the quantitative and qualitative determination for total phenolic content and individual phenolic compounds as allelochemical content for R. apiculata and A. aureum leaves as a potential allelopathic substance. The second objective is to investigate the allelopathic effect towards weed germination and growth through in vitro model system. Two types of maceration extraction comprising water extraction and sequential alkaline extract were used for allelochemical screening analysis. Both extractions were separated by ethyl acetate. Acrostichum aureum had the highest total phenolic content (1129.52 µg GAE/g DW) in comparison with R. apiculata. Meanwhile, the quantitative analysis by HPLC, revealed that different extraction detected different individual phenolic acid, Caffeic acid detected in both mangrove species in sequential alkaline extraction by A. aureum. The allelopathic effect of Chloris barbata for A. aureum extract indicated that during pre-emergent development, the suppression of weed growth was higher compared to post-emergent. Therefore, A. aureum may work as an allelochemical producer and can contribute to the establishment of pure colonies of A. aureum in the mangrove ecosystem.
Soil Water Analysis Tools (SWAT) hydrology modelling as a basis for spatial planning: a case study in Cimandiri Watershed, West Java Province
Authors: Ridwansyah I , Yulianti M , Wibowo H 
Published: December 2019

Abstract
Appropriate spatial planning can be analysed by looking at its impact on water resources on a watershed scale through a hydrological modelling approach. The objective of this study was to examine the effect of land-use change and the spatial plan of the region in the Cimandiri watershed using Soil Water Analysis Tools (SWAT) hydrological modelling. The Cimandiri watershed (1,830 km2) is situated in West Java Province, Indonesia. This watershed has a strategic position because of its proximity to the Capital City of Jakarta. This study highlights the importance of hydrological response considerations in spatial planning. From 1994 to 2016, there has been a reduction of forest land cover (157.8 ha), paddy fields (688.5 ha) and plantations (216.4 ha). This land-use change affects the hydrological conditions of the Cimandiri Watershed. The results indicated that there was an increase in the surface flow of 8.7 mm/year (186.6 to 195.3 mm/year), from 1994 to 2016 while baseflow decreased from 781.64 to 777.7 mm/year. The verification models were in satisfactory categories (R2 0.62 and NSE 0.51). Therefore, this indicated hydrological conditions in 1994 were relatively better than in 2016. The simulation result on the spatial plan shows the surface runoff, and the base rate was 284.9 mm/year and 684.7 mm/year, respectively. Interestingly, land use proportion based on urban spatial planning generated relatively higher surface runoff and sediment yield compared to existing land use. Hence there should be a review of the existing urban spatial planning of Sukabumi Regency that was resulting in the worst hydrological response based on SWAT model.
An investigation into the tribological properties of wood flour reinforced polypropylene composites
Authors: Ibrahim Mohamed A , Hirayama T , Khalafallah Diab 
Published: December 2019

Abstract
The uncontrolled recycling activities of waste species can lead to series problems to both environment and human health. In addition, the exploration of environmentally friendly materials has been received growing interests from researchers and academicians. Herein, we investigated the tribological and mechanical properties of wood flour reinforced polypropylene (WF/PP) composites. The WF/PP complexes were successfully fabricated via a controllable injection molding approach using PP frameworks incorporating 5 wt%, 15 wt%, 25 wt%, 35 wt%, 45 wt%, and 55 wt% WF in the presence of maleated polypropylene (MA-PP) as an effective coupling agent to enhance the WF adhesion to the polymeric matrix and promote the interfacial interaction and wettability. Results demonstrate improved mechanical properties and wear resistance of the as-synthesized composites with the increment of WF content, benefiting from the robust interfacial adhesion and collaborative effects of both natural filler and polymeric components. The inherent strength of natural fibers significantly contributes to the overall strength of the resultant composites. Remarkably, the embedment of coupling agent enables superior properties to certain dozens of WF due to further impregnation of filler along the matrix. Thus, our developed synthesis method holds a promise as efficient pathway to fabricate hybrids comprising polymer and natural fibers to achieve a maximum utilization.
Formation of a phase pure kesterite CZTSe thin films using multisource hybrid physical vapour deposition
Authors: Simya O K , Geetha Priyadarshini B , Balachander K , Ashok Anuradha M 
Published: December 2019

Abstract
Copper Zinc Tin Selenide (CZTSe) absorber films were obtained by growing CZT films with simultaneous RF and DC magnetron sputtering followed by thermal evaporation of Selenium. The deposition of CZTSe films was performed with different sputter powers with in-situ and post annealing of the deposited films at 400 °C in order to get uniformity and phase purity. Detailed GIXRD analysis concluded that a phase pure CZTSe film was obtained for in-situ annealed sample with Cu-Sn deposited through RF sputter power of 250W and Zn deposited through pulsed DC power of 200W. In conclusion from Raman scattering measurements, phase pure Raman active A mode of Kesterite CZTSe was observed for the same sample. Compositional analysis by EDS and XPS clearly showed that the CZTSe films are having Cu poor and Zn rich composition, favoring shallow Cu-vacancy which is highly desirable as p-type absorber layers for solar cells. The optical bandgaps (Eg) of the films calculated using Tauc plots were within the reported bandgap value of 1.0–1.35eV. The present deposition approach using hybrid PVD tool helps to control individual fluxes (Cu-Sn, Zn, Se), more precisely without the need of extra selenization step, leading to one step reduction in production process.