bluuebunny/crossref_metadata_2025_split huggingface dataset:
Consistency between individuals' past and current romantic partners' own reports of their personalities
Authors: Park Yoobin , MacDonald Geoff 
Published: June 2019

Significance
Although a romantic partner’s personality creates an interpersonal environment that can be highly consequential for emotional and physical well-being, little research has examined to what degree romantic partners’ personalities are similar across relationships. In this study, we provide evidence of stability in partner personality, implementing a rigorous analysis using self-reports of personalities from both past and current partners themselves. The significant degree of unique similarity between an individual’s past and current partners could not be explained by important potential confounds. Our results also provided tentative evidence that this similarity is weaker for people who are more extraverted or open to experience.
Nineteenth-century nanotechnology: The plasmonic properties of daguerreotypes
Authors: Schlather Andrea E. , Gieri Paul , Robinson Mike , Centeno Silvia A. , Manjavacas Alejandro 
Published: June 2019

Significance
Daguerreotypes, among the earliest photographs of the 19th century, owe their incredible optical properties, image resolution, and dynamic range to light scattering produced by metallic nanostructures on their surface. Here we provide a detailed experimental and theoretical analysis on how the material composition, morphology, and dimensions of these nanostructures determine the characteristics of the daguerreotype image. Our results provide a scientific understanding of the unique optical effects of these artworks and therefore, in addition to providing valuable insight for developing preservation protocols, can inspire additional approaches for color printing, where nanostructures are directly manufactured by light.
Whose Africa is rising?
Authors: Khisa Moses 
Published: June 2019

SUMMARY
This briefing revisits the ‘Africa rising’ narrative. It makes two arguments. First, the ‘Africa rising’ narrative at best sits on a shaky foundation. African economies may have registered modest growth in recent years but the growth is either superficial or not happening in the sectors that matter the most. Second, the rather rosy picture of a rising Africa masks the continent’s continued marginal position in the global capitalist structures of power, domination and exploitation.
Feeding Aspergillus protease preparation combined with adequate protein diet to rats increases levels of cecum gut-protective amino acids, partially linked to Bifidobacterium and Lactobacillus
Authors: Yang Yongshou , Kumrungsee Thanutchaporn , Kuroda Manabu , Yamaguchi Shotaro , Kato Norihisa 
Published: June 2019

ABSTRACT
Our recent study indicated that dietary Aspergillus oryzae-derived protease preparation (AP), through its enzymatic activity, exerted a bifidogenic effect in rats. We hypothesized that dietary AP links to protein degradation and subsequently elevates gut-protective amino acids (AAs) in rats fed adequate protein diet. In this study, dietary AP markedly increased the relative abundance of Bifidobacterium and Lactobacillus and the levels of free threonine, alanine, proline, taurine, ornithine, phenylalanine, cystine, and γ-aminobutyric acid in the cecum contents of rats fed with an adequate protein diet, but not in those fed with a low-protein diet. The elevated AAs, except ornithine and phenylalanine, potentially have gut-related health benefits. Some of the AP-modulated free AAs appeared to be associated with the relative abundance of Bifidobacterium and Lactobacillus. Thus, AP combined with adequate protein diet is likely to increase the levels of cecum beneficial free AAs, which is partially associated with the relative abundance of the probiotics.
Hyper-Raman lines emission concomitant with high-order harmonic generation
Authors: Bloch Etienne , Beaulieu Samuel , Descamps Dominique , Petit Stéphane , Légaré François , Magunov Alexander , Mairesse Yann , Strelkov Vasily 
Published: June 2019

Abstract
Hyper-Raman lines (HRL) resulting from strong-field light–matter interaction have been predicted theoretically in the 1990s but never identified in high-order harmonic generation experiments. Here, we use a combination of 800 and 400 nm laser pulses to control independently the two processes required for the hyper-Raman emission: creation of a coherence between two electronic states and laser-dressing of these states. As a result we observe simultaneously high-order harmonics, XUV free induction decay and HRL. We investigate experimentally and numerically the properties of this novel emission source. It can be of high interest, amongst others, for high-resolution spatio-temporal spectroscopy of excited electronic states in the same fashion high-order harmonics generation provides it for ground state.
The role of non-CO2 mitigation options within the dairy industry for pursuing climate change targets
Authors: Rolph K A , Forest C E , Ruark M D 
Published: June 2019

Abstract
Mitigation of non-CO2 climate forcing agents must complement the mitigation of CO2 to achieve long-term temperature and climate policy goals. A large share of global non-CO2 greenhouse gas emissions is attributed to agriculture, with a significant contribution related to dairy production. As demonstrated by the results of a recent USDA coordinated project, Dairy-CAP, dairy farmers can significantly reduce their greenhouse gas emissions by implementing beneficial management practices (BMPs). This study assesses the potential mitigation of projected climate change if greenhouse gases associated with the dairy subsector were reduced. To compare the performance of several mitigation measures under future climate change, we employ a fully coupled Earth system model of intermediate complexity, the MIT Earth System Model. With an interactive carbon-cycle, the model is capable of addressing important feedbacks between the climate and terrestrial biosphere impacting greenhouse gas concentrations. We illustrate the importance of ongoing mitigation efforts in the agricultural sector to reduce non-CO2 greenhouse gas emissions towards established climate goals. If BMPs are implemented globally within the next three decades, projected warming by the end of the century can be reduced by 0.21 °C on average or 6% of total warming, with dairy farm mitigation contributing to 0.03 °C of the temperature reduction.
More extreme marine heatwaves in the China Seas during the global warming hiatus
Authors: Li Yan , Ren Guoyu , Wang Qingyuan , You Qinglong 
Published: June 2019

Abstract
Based on the satellite-derived global daily sea surface temperature (SST) data set with high resolution (0.25° by 0.25°), we analyzed changes in annual mean SST and extreme SSTs over the China Seas since 1982. Results show that the annual mean SST in the China Seas has experienced a remarkable declining trend during the global warming hiatus (1998–2013), which was dominated by the striking cooling of SST in boreal winter. Despite annual mean SST experienced warming hiatus after 1998, the regional averaged SST for 1998–2013 was still 0.5 °C above that for 1982–1997. The statistical distributions show that there are not only significant warmer climate shift in annual mean SSTs but also in annual extreme hot SSTs and cold SSTs. These changes can increase the likelihood of extreme oceanic warming events, known as marine heatwaves (MHWs). Further analyses reveal that, from 1982 to present, the MHW frequency increases at a rate of 1.13 events per decade, 2.5 times the global mean rate. For the period 1998–2013, the MHWs in the China Sea has never decreased in both of the frequency and intensity but has already become more frequent, longer duration and more intense than those metrics of MHWs during 1982–1997.
Preliminary study of the degradation of biocellulose based film using soil fungi Aspergillus unguis TP3 and Paecilomyces marquandii TP4 producing cellulose
Authors: Srikandace Y , Andayani D G S , Karina M 
Published: June 2019

Abstract
Bacterial cellulose or biocellulose (BC) is cellulose produced from the activity of bacteria in the suitable growth media containing glucose as mainly carbon source. Due to its unique properties, BC is used for edible packaging. Many studies reported on anti bacterial activity on BC based-edible packaging against Escherichia coli and Staphylococcus aureus as as well as Listeria monocytogenes. This study reports the biodegradation of BC (sample A) based-film by using Aspergillus unguis and Paecilomyces marquandii. For comparison, BC film was added with CMC (sample B), with glycerol (sample C), with CMC and glycerol (sample D), respectively. Biodegradation was carried out using broth fermentation and solid substrate fermentation (SSF). BC films (1 cm x 1 cm) and fungi were fermented in 100 mL of sterile aquadest for 60 days with agitation (120 rpm at room temperature). For treatment in SSF, fungi were inoculated into BC films for 60 days at room temperature in petridish. Results showed that all compounds of films were still available based on FTIR results. The physical performance of films BC was in solid chewy (A), like chewy thread (B and C), and like powder (D) form. Results showed that both fungi biodegraded films through broth fermentation whereas no biodegradation activity on SSF. From SEM analysis, it showed that the film surfaces performed fine and smooth morphology.
Evaluation of the strength of coconut shell aggregate concrete block for parking area
Authors: Ridwan A , Limantara A D , Subiyanto B , Gardjito E , Rahardjo D , Santoso A , Heryanto B , Sudarmanto H L , Murti H , Sari A G , Mudjanarko S W 
Published: June 2019

Abstract
The development of green technology requires the utilization of waste products and processing of them into cheap and environmentally friendly materials. The idea was applied in the concrete block (conblock) production. The usage of coconut shell waste for the concrete mixed material will reduce the cost and produce an environmentally friendly road conblock for pavement, which also quickly absorbs runoff into the soil so that pavement is more durable.The purpose of this research was to evaluate the compressive strength of concrete obtained by the addition of fine aggregate mixture and a coarse aggregate of coconut shell. The test specimens used were cubes with a size of 15x15x15 cm consisting of 5 samples for each variation of coconut shell and powder content (0%, 20%, 25%, and 30%) and tested at 28 days. The average yield of compressive strength and absorption at 28 days were 18.5 MPa and 22% for 0% variation, 11.4 MPa and 16% for 20% variation, 7.6 MPa and 14% for 25% variation, and 6.7 MPa and 12% for 30% variation. The results inform that the concrete given a mixture of fine and coarse aggregate coconut shell has decreasing compressive strength and absorption.
Isolation and characterization of Boso fish (Oxyeleotris marmorata) oil and their recovery using enzymatic reaction
Authors: Kosasih W , Priatni S , Saepudin E , Rosmalina R T , Nurasiah S , Endah E S 
Published: June 2019

Abstract

Oxyeleotris marmorata (Boso) fish is abundant and widespread in West Java Sea area, primarily in Indramayu. This study was aimed to improve the extraction method of essential fatty acids from Boso fish oil, so it would increase the economic value and the benefits of Boso fish. The extraction of fish oil was carried out by n-hexane for 2, 4, 6, 8, 10 and 12 hours. Fish oil was hydrolyzed by a commercial lipase enzyme at various concentration for 48 hours. The fish oil products were analyzed for acid level, acid value and saponification value. Fatty acid contents of fish oil with and without hydrolysis with lipase were determined by Gas Chromatography (GC) and Gas Chromatography-Mass Spectrophotometry (GC-MS) methods. GC-MS results show that fish oil without lipase hydrolysis contained 6.31% omega-6 and 12.31% omega-9, while fish oil hydrolyzed with lipase contained 10.76% omega-6 and 13.84% omega-9. The optimum methyl linolenic acid concentration of 8276.6 ppm was obtained with 9 units lipase concentration, whereas the optimum EPA (eicosapentaenoic acid) concentration of 3937.6 ppm was obtained with 6 units lipase concentration. Enzymatic reactions using lipase can increase the level of omega-3, omega-6 and omega-9 from Boso fish oil.
Performance of the three-stages anaerobic tofu wastewater treatment during the second start-up process
Authors: Sriwuryandari L , Widyarani  , Priantoro E A , Muchlis  , Hamidah U , Sembiring T , Sintawardani N 
Published: June 2019

Abstract
Tofu industry in Indonesia develops rapidly with the demand of the community. Therefore it is necessary to pay attention to the condition of liquid waste as the by-product of the industry. Traditionally, small- to medium-scale tofu industries produce highly polluted wastewater in compare with the big industries. For this reason, research on the tofu wastewater treatment was carried out to study the stability of anaerobic process in a three-stages packed-bed system after two months of pause or no-feeding process. The experiment used tofu wastewater from one of the factories in Bandung; the untreated wastewater had 15.9 g/L of COD at pH 3.5. Observations were carried out for 26 days. The system consisted of three similar reactors that worked in serial; each has the capacity of 10 litres. Tofu wastewater was introduced from the bottom of the reactor flowing vertically upward to the outlet. The outlet of the first reactor flow to the bottom inlet of the second reactor, and subsequently the outlet of the second reactor fed the third reactor. Each reactor was placed at different altitudes to facilitate gravity flow from one reactor to the next at the same rate. The results of the experiment show that the system overall worked well in a continuous flow rate. The COD value could decrease from 15.9 g/L to 7.4 g/L on average at the third reactor, as well as the pH changed from pH 3.5 to 7.
Removal of fluoride ion from fertilizer industry wastewater to recover ammonium and phosphate using a five-compartment electrodialysis system
Authors: Arum G S , Bagastyo A Y 
Published: June 2019

Abstract
Wastewater from the fertilizer industry contains high concentrations of ammonium and phosphate ions, up to 3,395 mg.L−1 and 12,725 mg.L−1, respectively. These ions can be recovered as struvite precipitates. However, 1,158 mg.L−1 of fluoride ions contained in the wastewater may influence the struvite formation. Therefore, experiments using a laboratory-scale of five-compartment electrodialysis batch reactor were performed to remove fluoride ion and subsequently recover ammonium and phosphate ions. Electrical currents of 0.05, 0.1, and 0.15 A were applied constantly to the electrodes. The initial pH of wastewater was adjusted to 5, 7, and 9. The highest removal of fluoride ion was obtained at 0.1 A, i.e. decreased to 376 mg.L−1 and 486 mg.L−1 at pH 5 and pH 7, respectively. At the same conditions, the final ammonium concentrations at pH 5 and 7 were 2,127 mg and 2,185 mg, respectively. Similarly, 7,878 mg and 10,669 mg phosphate ions were recovered at pH 5 and pH 7, respectively. The energy consumed for fluoride removal at pH 5 was higher than pH 7, i.e. 4 Wh.g−1 F− vs. 7 Wh.g−1 F−. Nevertheless, the suspended solid formation at pH 5 was higher than pH 7, suggesting that pH operational at 7 is preferable for application with less possibility of scaling formation.
Low volume liquid-liquid extraction for the determination of benzene, toluene, and xylene in water by GC-FID and HPLC-UV
Authors: Yusiasih R , Marvalosha R , Suci S D S , Yuliani E , Pitoi M M 
Published: June 2019

Abstract
A simple sample preparation method based on green analytical chemistry was proposed to measure benzene, toluene, and xylene (BTX) in water. The method implemented low volume liquid-liquid extraction for extraction of BTX from water using acetonitrile without any solid phase extraction (SPE) clean-up to cut the chemical consumption during the sample preparation. The quantification of BTX was done by GC-FID and HPLC-UV for comparison. The result showed that the method in combination with GC-FID was able to detect toluene and xylene in spiked water samples below the limit regulated by Ministry of Health of Indonesia (MRL toluene=0.7 mg/L; MRL xylene 0.5 mg/L) but not for benzene (MRL benzene=0.01 mg/L).
Health Benefit Value of Selenium (HBV-Se) of mercury from consumption of fishes from Tual, Indonesia
Authors: Kusnadi A , Oktaviyani S , Suratno  
Published: June 2019

Abstract
Our study reports the total mercury (THg) and total selenium (TSe) content measured in the tissue of fishes from the market at Tual (Indonesia), that was used to examine the Health Benefit Value of Selenium (HBV-Se) as a food safety index from mercury contamination in seafood consumption. Nine fish species that were usually eaten and predicted to have a high content of mercury were bought from the fish market. Direct Mercury Analyzer (DMA) NIC-MA3000 was used to analyze the total mercury (THg) content directly. While the fish sample for total selenium analysis must be prepared with microwave digestion prior to measure by ICP-OES. The mean THg concentrations varied from 0.009 up to 1.38 mg/kg-DW and the mean TSe concentrations varied from 1.56 up to 6.88 mg/kg-DW. Cephalopholis sonnerati and Epinephelus morrhua exceeded the SNI standard which has a limit of 0.5 mg/kg, but all the fishes exceeded the new BPOM guidelines (0.06 mg/kg) except Siganus lineatus. The THg values from the highest were Epinephelus morrhua > Cephalopholis sp > Cephalopholis ongus > Lutjanus gibbus > Ephinephelus ongus > Euthynus affinis > Rastrelinger kanagurta > Katsuwanus pelamis > Siganus lineatus. Measurement of HBV-Se value of all the fishes in Tual showed positive values, which means safe for consumption. HBV-Se index provided a comprehensive elucidation of human risk assessment on food safety compared with the single data of total mercury due to mercury contamination.
Etched and non-etched polystyrene nanoballs coated with AuNPs on Indium Tin Oxide (ITO) electrode as H2O2 sensor
Authors: Saputra G M A , Purwidyantri A , Yang C-M , Prabowo B A , Lai C-S 
Published: June 2019

Abstract
In electro-analytical applications, metallic nanoparticles (NPs) facilitate roughening of the conductive sensing interface and electrochemical signal amplification as a result of some metal NPs catalytic properties. In this study, natural lithography, termed as nanospheres lithography (NSL), was used to fabricate 5 nm thick AuNPs from thermal evaporation system on an Indium Tin Oxide (ITO) substrate patterned with polystyrene (PS) nanoballs (d=100 nm). The electrode substrate was characterized by field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), and cyclic voltammetry (CV) and utilized as a sensor to measure H2O2. More prominent features were shown by the etched PS on the fabricated electrode that left AuNPs honeycomb-like pattern than the non-etched one. Higher oxidation peak was demonstrated by the etched electrode than non-etched electrode as recorded with cyclic voltammogram, as well as in H2O2 measurement. CV outcomes denoted higher surface area at the substrate with etched PS and resulted in a lower limit of detection (LOD) of H2O2 than the non-etched substrates.
Experimental Study on the Unconfined Compressive Strength of Artificially Cemented Sand
Authors: Wang Xumin , Wang Cheng , Yi Zhao 
Published: June 2019

Abstract
Artificially cemented sand sample was prepared by incorporating cement clinker into the standard sand sample. The electron microscopic scanning test (SEM) and the unconfined compressive strength test of the artificial cementation sand sample were carried out, and the microstructure changes before and after the cementation of the sand sample were analyzed. The formula of the unconfined compressive strength of cemented sand samples considering the influence of cement clinker incorporation ratio Cv and curing time t is proposed. Scanning electron microscopy experiments show that as the incorporation ratio increases, the standard sand gap is gradually filled by the cements, and the shape of the cements attached to the surface of the standard sand changes from flocculant filamentous to pellet. The unconfined compressive strength test shows that the axial strain decreases with the increase of the blending ratio, and the brittle fracture is more and more obvious. The fitting formula of the unconfined compressive strength is proved to be reasonable by the experimental data of other scholars.
Combined Effect of Load and Water Environment on Creep Behaviours of Red Sandstone
Authors: Yu Chaoyun , Tang Chunan 
Published: June 2019

Abstract
Creep experiment was conducted on specimens submerged in water to know the combined effect of load and water on mechanical behaviour of red sandstone. Compared with saturated and dry specimen with the sealed surface, results show that the steady-state creep strain rate of submerged specimen is the highest, whereas, the corresponding long-term strength is the smallest. Creep cracks initiation and propagation make it possible for water in the environment to migrate into the tip of new cracks, which intensifies the stress corrosion effect of water. This is the effect mechanism of a combined action of load and water on the creep behaviour of red sandstone. The presented experimental results are beneficial for monitoring and assessing the long-term stability and safety of rock engineering.
Experimental Study of Pervious Concrete Using Recycled Coarse Aggregate
Authors: Zhang Weidong , Gao Yanan 
Published: June 2019

Abstract
The project aims at study the effect of water-cement ratio and the replacement ratio of recycled coarse aggregate (RCA) on the physical and mechanical properties of pervious concrete and the correlation between these properties. The research methodology is to replace natural coarse aggregate (NCA) with RCA at four replacement levels of 10, 20, 30 and 40 % and adjust water-cement ratios of 0.25 and 0.30. The total void content, effective void content, cubic compressive strength, splitting tensile strength, water permeability, and abrasion resistance of pervious concrete were tested. The results show that with the increasing of w/c ratio or replacement ratio of RCA, void content and permeability coefficient of pervious concrete increase in a certain degree, but cubic compressive strength, splitting tensile strength and abrasion resistance decrease. Data analysis shows that there are good correlations between relevant performance indicators.
An Improved Damage Mechanics Method for Solving Three Dimensional Crack Problems of Concrete
Authors: Yun Kumchol , Wang Zhenqing 
Published: June 2019

Abstract
In this paper, a damage mechanical model is improved to simulate the three-dimensional (3D) mixed mode cracking process of quasi-brittle material such as concrete. The cracking and crack propagating in an element is reflected in the model by controlling the degraded stiffness matrix and the dissipated energy. The local tracking algorithm (LTA) is employed to preselect the element that will belong to the crack path to be damaged. The local tracking algorithm is extended to 3D by analyzing and overcoming defects in the previous 3D LTAs. The present LTA has very low computational cost and this fact is proved by comparison with well-known global tracking algorithm. The numerical results from the novel damage model added 3D local tracking algorithm show good agreement with the results of the previous researches, demonstrating the superior performance of the approach in predicting crack propagation and fracture strength.