bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multinationals, Capital Export, and the Inclusive Development Debate in Developing Countries: The Nigerian Insight
Authors: Ezeoha Abel , Akinyoade Akinyinka , Amobi Ifediora , Ekumankama Ogbuagu , Kamau Paul , Kazimierczuk Agnieszka , Mukoko Catherine , Okoye Ifeanyi , Uche Chibuike 
Published: January 2022

AbstractIn this paper, we employed a blend of multiple and historical case study design, and a mix of institutional, behavioral, resource-based, and multinational theories, to examine the nature of multinational companies’ (MNC) engagements in local economic development and capital export practices in an African context. Evidence from our Nigerian case analysis (FrieslandCampina, Nigerian Breweries Plc. and Dangote Cement) confirms the proposition that, faced with a similar degree of uncertainty and constrained institutional environment and laying claims to differing sources of competitive advantage, both local and foreign MNCs would repatriate profits and limit exposures to local value chains (LVCs) mainly as a strategy for mitigating country risks and preserving corporate value. Such limited exposures detach MNCs, especially the foreign ones, from the LVCs, and by doing so push them to deeper reliance on the global value chains (GVCs). Linking local businesses to the GVCs is central in the inclusive development (ID) debate essentially because it allows for the redistribution of economic benefits, helps in building a complementary (rather than competitive) relationship between MNCs and local businesses, and facilitates local businesses’ access to international markets. We, therefore, recommend that in pursuit of the inclusive and sustainable development projects in Africa, industrial policies need to be tailored toward stabilizing the policy environment, protecting investments from risk of expropriation, and incentivizing MNCs’ participation in the LVCs.
Red blood cell in the field of a beam of optical tweezers
Authors: Ermolinskiy P.B. , Lugovtsov A.E. , Semenov A.N. , Priezzhev A.V. 
Published: January 2022

AbstractWe consider the effect of a tightly focused laser beam with a wavelength of 1064 nm and a power from 10 to 160 mW on red blood cells during their optical trapping with optical tweezers. It is found that the shape of a red blood cell, which alters after optical trapping, ceases to change when the trapping duration is less than 5 min and the laser beam power is less than 60 mW. At a beam power above 80 mW, the red blood cell begins to fold at a trapping duration of about 1 min, and at powers above 100 – 150 mW, the red blood cell membrane ruptures in 1 – 3 min after optical trapping. It is also found that with repeated short-term capture of a red blood cell in an optical trap, the deformation properties of the membrane change: it becomes more rigid. The obtained results are important both for understanding the mechanisms of interaction of a laser beam with red blood cells and for optimising the technique of optical experiments, especially for measuring the deformation properties of a membrane using optical tweezers.
Melanin diagnostics with nonlinear optics: a mini-review
Authors: Shirshin E.A. , Yakimov B.P. , Budylin G.S. , Buyankin K.E. , Armaganov A.G. , Fadeev V.V. , Kamalov A.A. 
Published: January 2022

AbstractOptical methods are widely used to perform fundamental studies of living systems and solve problems of biomedical diagnostics. Along with the classical spectroscopy, methods of nonlinear optics (e.g., multiphoton microscopy) are also applied in biophotonics. The potential of nonlinear optical methods for visualisation and analysis of the properties of endogenous chromophore molecules are considered in this minireview. Melanin – a pigment with specific spectral features of photophysical properties in the visible and near-IR ranges – is taken as an example. It is discussed what information about its localisation in tissues and structural organisation can be obtained by nonlinear optical methods: multiphoton fluorescence microscopy (including fluorescence lifetime imaging), third harmonic generation, pump – probe spectroscopy, and coherent anti-Stokes Raman spectroscopy.
Effect of anisotropy of a single-mode fibre on lightning-induced rotation of polarisation of a light signal in an optical ground wire
Authors: Gorbatov D.V. , Konyshev V.A. , Lukinykh T.O. , Nanii O.E. , Novikov A.G. , Treshchikov V.N. , Ubaydullaev R.R. 
Published: January 2022

Abstract
A numerical model is constructed for calculating lightning-induced rapid changes in the polarisation state of a light signal at the output of a fibre-optic communication line with an optical ground wire. It is shown that taking into account anisotropy of real optical fibres has a noticeable effect on the shape of the polarisation rotation speed time profile. It is found that the maximum rate of change in the polarisation state and its temporal profile depend on the location of the lightning strike in the fibre span, the magnitude of fibre anisotropy and the direction of propagation of a light wave.
Influence of the measurement configuration on the results of Raman microspectroscopy of human hair
Authors: Brandt N.N. , Travkina E.I. , Mikhal’chik E.V. , Chikishev A.Yu. 
Published: January 2022

AbstractIncreasing interest in spectroscopic studies of human hair raises the question about the accuracy of measurement of their spectra and requires optimisation of experimental facilities. An original method of obtaining transverse hair sections without using a microtome and chemical influence is proposed. The results obtained by confocal Raman microspectroscopy of human hair differently oriented with respect to the optical axis of the measuring setup are compared. It is shown that, in addition to expected changes in the spectra measured at different distances from the hair periphery in the direction to its centre, the spectra measured in the case of hair excitation perpendicular and parallel to its axis are also considerably different.
Terpenoids of plants in arid environments
Authors: Tahri Djilali , Elhouiti Fatiha , Ouinten Mohamed , Yousfi Mohamed 
Published: January 2022

Abstract
Arid and desert environments are characterized by the sparse and discontinuous vegetation cover. Species that have been able to survive difficult bioclimatic conditions and adapt from generation to generation in these areas had to develop physiological and biochemical mechanisms of tolerance and/or resistance. The use of secondary metabolites, specifically terpenoids, is predominant in most of the biotic and abiotic interactions in which these plants are involved. Studies have shown their roles in the prevention of oxidative stress by intervening in thermo-tolerance, water stress, and salt stress generalized in a model of "the protective role of volatile compounds" explained by a single biochemical mechanism. Other studies have proven the functions of terpenoids in direct and indirect defenses against natural enemies, herbivores, and pathogenic microorganisms, in the attraction of pollinators, in competition and facilitation and other interactions between plants. This review mainly summarizes the recent research progress on the adaptation mechanisms of plants in arid environments and the biological and ecological roles of terpenoids in the various biotic and abiotic interactions.
Descriptors of intrinsic hydrodynamic thermal transport: screening a phonon database in a machine learning approach
Authors: Torres Pol , Wu Stephen , Ju Shenghong , Liu Chang , Tadano Terumasa , Yoshida Ryo , Shiomi Junichiro 
Published: January 2022

Abstract
Machine learning techniques are used to explore the intrinsic origins of the hydrodynamic thermal transport and to find new materials interesting for science and engineering. The hydrodynamic thermal transport is governed intrinsically by the hydrodynamic scale and the thermal conductivity. The correlations between these intrinsic properties and harmonic and anharmonic properties, and a large number of compositional (290) and structural (1224) descriptors of 131 crystal compound materials are obtained, revealing some of the key descriptors that determines the magnitude of the intrinsic hydrodynamic effects, most of them related with the phonon relaxation times. Then, a trained black-box model is applied to screen more than 5000 materials. The results identify materials with potential technological applications. Understanding the properties correlated to hydrodynamic thermal transport can help to find new thermoelectric materials and on the design of new materials to ease the heat dissipation in electronic devices.
A dimethyl methylphonate sensor based on HFIPPH modified SWCNTs
Authors: Wu Haiyang , Yuan Yubin , Wu Qiang , Bu Xiangrui , Hu Long , Li Xin , Wang Xiaoli , Liu Weihua 
Published: January 2022

Abstract
In order to meet the requirements of ultra-fast real-time monitoring of sarin simulator with high sensitivity and selectivity, it is of great significance to develop high performance dimethyl methylphonate (DMMP) sensor. Herein, we proposed a DMMP sensor based on p-hexafluoroisopropanol phenyl (HFIPPH) modified self-assembled single-walled carbon nanotubes (SWCNTs) with field effect transistor (FET) structure. The self-assembly method provides a 4 nanometres thick and micron sized SWCNT channel, with high selectivity to DMMP. The proposed SWCNTs-HFIPPH based sensor exhibits remarkably higher response to DMMP than bare SWCNT based gas sensor within only few seconds. The gas sensing response of SWCNTs-HFIPPH based sensor for 1 ppm DMMP is 18.2%, and the response time is about 10 s. What’s more, the gas sensor we proposed here shows excellent selectivity and reproducibility, and the limitation of detection is as low as ppb level. The proposed method lays the foundation for miniaturization and integration of DMMP sensors, expecting to develop detection system for practical sarin sensing application.
Role of extended gravity theory in matter bounce dynamics
Authors: S Agrawal A , Tripathy S K , Pal Sarmistha , Mishra B 
Published: January 2022

Abstract
In this work, we have studied some bouncing cosmologies in the frame work of f(R, T) gravity. The bouncing scenario has been formulated to avoid the big bang singularity. The physical and geometrical parameters are investigated. The effect of the extended gravity theory on the dynamical parameters of the model has been investigated. It is found that, the f(R, T) gravity parameter affects the cosmic dynamics substantially. We have also, tested the model through the calculation of the cosmographic coefficients and the Om(z) parameter. A scalar field reconstruction of the bouncing scenario is also carried out. The stability of the model are tested under linear, homogeneous and isotropic perturbations.
Hawking radiation and the quantum marginal problem
Authors: Aurell Erik , Eckstein Michał , Horodecki Paweł 
Published: January 2022

Abstract
In 1974 Steven Hawking showed that black holes emit thermal radiation, which eventually causes them to evaporate.
The problem of the fate of information in this process is known as the “black hole information paradox”.
Two main types of resolution postulate either a fundamental loss of information in Nature — hence the breakdown of quantum mechanics — or some sort of new physics, e.g. quantum gravity, which guarantee the global preservation of unitarity.
Here we explore the second possibility with the help of recent developments in continuous-variable quantum information.
Concretely, we employ the solution to the Gaussian quantum marginal problem to show that the thermality of all individual Hawking modes is consistent with a global pure state of the radiation. Surprisingly, we find out that the mods of radiation of an astrophysical black hole are thermal until the very last burst. In contrast, the single-mode thermality of Hawking radiation originating from microscopic black holes, expected to evaporate through several quanta, is not excluded, though there are constraints on modes' frequencies. Our result paves the way towards a systematic study of multi-mode correlations in Hawking radiation.
Dynamical Casimir–Polder force in a semi-infinite rectangle waveguide
Authors: Jin Zhe , Tian Tian , Wang Wentao , Long Yumei , Zhang Xue , Zheng Taiyu 
Published: January 2022

Abstract
In this paper, we study the dynamical Casimir–Polder force between an ensemble of identical two-level atoms and the wall of a rectangle waveguide with semi-infinite length. With the presence of both the rotating wave and counter rotating wave terms in the light–matter interaction Hamiltonian, we utilize the perturbation theory to solve the Heisenberg equation. Up to the seconder of coupling strength, we obtain the energy shift analytically and the Casimir–Polder force numerically. Our result shows that the dynamical behavior of the Casimir force is closely connected to the photon propagation in the waveguide. Therefore, we hope this work will stimulate the studies about the quantum effect in waveguide scenario.
A look at photodynamic inactivation as a tool for pests and vector-borne diseases control
Authors: Lima Alessandra R , Dias Lucas D , Garbuio Matheus , Inada Natalia M , Bagnato Vanderlei S 
Published: January 2022

Abstract
The control of pests and vector-borne diseases (VDBs) are considered public health issues Worldwide. Among the control techniques and pesticides used so far, photodynamic inactivation (PDI) has been shown as an eco-friendly, low cost, and efficient approach to eliminate pests and VDBs. PDI is characterized using a photosensitizing molecule, light and molecular oxygen (O2) resulting in production of reactive oxidative species which can promote the oxidation of biomolecules on pests and vectors. Herein, we review the past 51 years (1970–2021) regarding the use of photo pesticides, reporting the most important parameters for the protocol applied, the results obtained, and limitations. Moreover, we described the mechanism of action of the PDI, main classes of photopesticides used so far as well as the cell death mechanism resulting from the photodynamic action.
Preparation and Characterization of Gaphene-Doped Carbon-Aerogel Electrode
Authors: Wang Zhengshun , Wang Kaizheng , Mao Jianzhen , Jiang Zaiyong 
Published: January 2022

Abstract
Carbon-aerogel is a kind of nano-porous carbon material with special three-dimensional network structure. Electrode materials with high specific surface area, high porosity, superior conductivity and low density were obtained by adding graphene to prepare graphene-doped carbon-aerogels.
Effects of Calcium Sulfate Whiskers on the Mechanical Properties and Light Transmittance of PE Greenhouse Films
Authors: Qiao Runmeng , Zhong Zhengping , Liu Qiao , Liu Jialei , He Wenqing 
Published: January 2022

Abstract
Calcium sulfate whisker (CSW) is a kind of fiber crystal material with high orientation structure. The major goal of this research is to study the changes of mechanical properties and light transmittance of PE greenhouse film with different proportions of CSW. The experimental results show that the mechanical properties and light transmittance of PE/CSW films are enhanced compared with the pure PE. For PE/2%CSW, it shows a 18.6% increase in tear strength, a 3.1% increase in luminous transmittance and 17.7% increase in haze. The PE/5%CSW demonstrates a 12.8% higher in tensile strength, a 20.5% higher in tear strength, a 23.9% lower in luminous transmittance and a 53.0% higher in haze. This article gives a new formula to strengthen the mechanical properties of PE greenhouse films and finds the direction for the research and development of astigmatic covering film.
Two-time Calibration at Both Ends for Sulfur Measurement by Using High Frequency Induction Infrared Absorption Method
Authors: Wei Jianhuan 
Published: January 2022

Abstract
High frequency induction heating infrared absorption method is a relative measurement method, and it requires calibrating the analyzer during the measurement process. Usually, one-time calibration on an analyzer is made for high sulfur value by using standard substances. The method proposed by this paper calibrates carbon-sulfur analyzers with a method of two-time calibration at both ends, which eliminates the impact of sulfur blank and thus improves the accuracy and precision of ultra-low sulfur measurement. The method extents the lower limit of measurement of sulfur in high temperature alloy, to 0.00005%, namely, 0.5ppm.
Analysis on Influence of Hydrogen Content Exceeding Standard in GaAs Device
Authors: Song Yan , Wen Ping , Hua Xi , Yang Zhao , Xu Tang , Dong Zuodian 
Published: January 2022

Abstract
Aiming at the problem of hydrogen content exceeding the standard in GaAs device, the influence mechanism of hydrogen content exceeding the standard on the device is analyzed, the failure model of hydrogen content exceeding the standard in GaAs device in engineering is given, the source of hydrogen is analyzed, and the protective measures of hydrogen content exceeding the standard are given. It is of certain guiding significance for future engineering application.
Production and Identification of Polypeptide from Silks by Hydrothermal Method
Authors: Jin Tian , Wei Tao , Zhang Zitong , Lei Zehao , Sun Liquan 
Published: January 2022

Abstract
There are two kinds of proteins in silk, sericin and silk fibroin. Polypeptide compounds from silk sericin and silk fibroin were prepared by hydrothermal method. The process of silk dissolution was investigated under different solid-liquid ratio, reaction temperature and reaction time. By controlling the operating parameters of hydrothermal method, the temperature, material ratio and time were further optimized, and the best experimental results were obtained, the expected decomposition of silks occurred when the ratio of silks to waters was selected as 1 to 10, at 140 degree in 30 min. The molecular weight of polypeptide was detected by SDS-PAGE electrophoresis and analysed by MALDI-TOF-MS. The results showed that the molecular weight of the polypeptide obtained from silks was about 6000-8000Da. After literature research, the polypeptide with such molecular weight could have better performance for some functional additives.
Preparation and Properties of Decellularized Sheep Kidney Derived Matrix Scaffolds
Authors: Zheng Le , Zheng Shuangshuang , Chen Zilong , Li Xiangqin , Liu Chunyan , Bai Jie , Jiang Daqing , Nie Yi , Zhang Jingying , Liu Tianqing , Song Kedong 
Published: January 2022

AbstractScaffolds from tissues or organs have nanoscale microstructures. Derived matrix scaffolds prepared by decellularized method can provide more cell attachment sites, which is conducive to cell adhesion, proliferation, differentiation and other physiological activities on scaffolds. In this study, the sheep kidney decellularized matrix scaffold was prepared by the method of decellularization. Due to the poor mechanical properties of the decellularized matrix, the cross linking method was adopted to enhance its mechanical properties. The decellularization efficiency of sheep renal matrix scaffolds was observed by scanning electron microscopy and histological staining, and the biocompatibility of the scaffolds was investigated by inoculating adipose derived stem cells. It was found that the scaffold had good decellularization effect and good pore structure.
Research Progress of Heat Resistant Magnesium Alloys
Authors: Wang Xiaomin , Su Yang , Guo Lili , Liu Yan , Li Honggang , Ren Hailin 
Published: January 2022

Abstract
Magnesium alloy has extremely excellent properties and is known as “21st Century Green Engineering Material”. This article mainly introduces the influence of the heat resistance and comprehensive performance of the three series of Mg-Al, Mg-Zn and Mg-RE heat-resistant magnesium alloys after adding rare earth elements, alkali metal elements and other elements. Three development directions of improving the heat resistance of magnesium alloys are prospected. These are: 1. Using cheap alloy elements (such as Ca, Si, etc.) to replace rare earth elements of the heat-resistant magnesium alloy, 2. Titanium element is added to improve heat-resistant magnesium alloy’s mechanical properties and its strength, 3. The new casting process and processing technology are used to improve the heat-resistant magnesium alloy’s properties. This article aims to provide technical reference for the development of my country’s magnesium alloy industry.
Comparative Study of the New Type Capping Layer for Hf0.5Zr0.5O2 Ferroelectric Film
Authors: Zhai Minglong , Liu Xueyuan , Chang Hudong , Liu Honggang , Sun Bing 
Published: January 2022

Abstract
The capping layers have great influences on the ferroelectricity of the Hf0.5Zr05O2 (HZO) film during annealing process. In this paper we compared the properties of the HZO film with two inorganic nonmetallic capping layers and no capping layer. The remnant (2Pr) of HZO films are 23.5 uC/cm2, 27.3 uC/cm2 and 20.3 uC/cm2 for no capping layer, Si3N4 capping layer and SiO2 capping layer, respectively. The capping layer can change the direction of the coercive filed shift even though the capacitors have the same metal electrodes.
A New Purification Process of Solanesol Based on Chemically Modified Diatomite
Authors: Liu Jing , Han Xiaobin , Peng Yulong , Wang Xiaoyan , Qiao Runmeng , Liu Jialei 
Published: January 2022

Abstract
Diatomite is a kind of natural material with adsorption capacity and it’s widely used in industry. The main purpose of this paper is to study the influence of hydrochloric acid concentration and modification time on the modification effect of diatomite. This article describes a modified method of diatomite, which can not only reduce the purification cost, but also improve the separation efficiency of solanesol. The results show that when the concentration of hydrochloric acid is 3mol/L and the treatment time is 50 minutes, the modification effect of diatomite is the best. The determination of the optimum technological conditions is conducive to the separation and purification of Solanesol by diatomite, and lays a foundation for the further development and utilization of diatomite.
Narrow Gap MAG Welding and Joint Performance Analysis of 25Cr2NiMo1V Thick Plate
Authors: Qian Xiaoyan , Ye Xin , Hou Xiaoqi , Wang Fuxin , Li Shaowei , Yu Zhishui , Huang Chen , Cui Jinpeng , Zhu Chunxiang 
Published: January 2022

Abstract
The narrow gap MAG welding system was used to successfully weld the 50mm thick butt joint of 25Cr2NiMo1V rotor steel. After 15-layer bead welding, heat treatment is performed on the welded joint. Compare the changes in the microstructure, tensile strength and impact energy of the welded joints and the heat-treated joints at 580°C (20h). The results show that after the heat treatment of the structure, the side lath ferrite in the coarse-grained region grows up, and the eutectoid ferrite grows up in the fine-grained region first. The strength of the welded joint is about 605MPa, and the fracture is characterized by ductile fracture. After heat treatment at 580°C (20h), the strength is about 543MPa, the fracture is characterized by ductile fracture, and there are also a large number of discontinuous small surface platforms, and the characteristic of brittle fracture appears slightly. The impact energy of the weld center of the welded joint is about 141J, the fusion line area is about 113J, and the toughness of the fusion line is slightly lower than that of the weld center. After heat treatment, the impact energy at the center of the weld is about 183J, the fusion line area is about 95J, the toughness of the weld center increases, and the toughness of the fusion line decreases.