bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on the adsorption and desorption characteristics of Phosphorus in Ryegrass and natural grasses in sloping land of Rainy Area of West China
Authors: Sun Bowen , Wang Qianxin , Zhao Qin , Yang Yuanxiang , Sheng Yuzhang 
Published: July 2019

Abstract
In this study, runoff plot test was carried out in Rainy Area of West China to study the adsorption and analytical characteristics of phosphorus on ryegxass(Lolium perenne L.) and natural grass soil planted on different slopes. The results showed that the content of available phosphorus and total p in ryegrass was higher than that in natural grassland. Langmuir equation can well fit the adsorption of phosphorus on soil, and the maximum adsorption capacity and adsorption coefficient are 434.76mg/kg and 0.57, respectively, which all appear in ryegrass field. The secondary kinetic equation can well fit the adsorption dynamic characteristics of phosphorus. The equilibrium adsorption capacity and adsorption rate are between 44.64∼49.06 mg/kg and 0.0258~0.0466 kg/(mgh), and the maximum value is in ryegrass field. The phosphorus analysis rate of the soil in the study area was 30.93∼34.41%, which showed that the natural grassland was > ryegrass. At the same adsorption amount, the soil phosphorus content was > ryegrass. The results showed that the soil phosphorus fixation effect of ryegrass was good. The rational planting of ryegrass on the slope of yuping district in west China can effectively reduce the pollution of phosphorus from non-point sources.
Analysis of Sediment-retaining Function of “7.26” Storm of Silt Dam in Xiaoli River Basin
Authors: Li Li , Jian Shi Xue , Shan Yang Ji , Li Ma 
Published: July 2019

Abstract
The construction of silt dams on the loess plateau is one of the highlights of water conservancy construction. Because silt dams can effectively prevent soil erosion, silt dams have been built on a large scale in the loess plateau. But what is the function and effect of silt dam in the process of rainstorm? It is a scientific question to be answered urgently. Therefore, we selected six hundred and forty-six silt dams in Xiaoli river basin under “7.26” rainstorm to carry out field survey and measure the silt and sediment situation of silt dams, so as to explore the silt retaining capacity of silt dams in small watersheds and the main factors affecting silt and sediment of silt dams during rainstorm. The results show that the small and medium-sized dams in the Xiaoli river basin have a strong ability to retain sediment in rainstorm, but the large and medium-sized dams play a major role in retaining sediment. The average modulus of retaining sediment in the basin is 12587t/km2.
Research on the characteristics of driver visual behavior in highway extra-long tunnel
Authors: Yang Yunxing , Chen Fang 
Published: July 2019

Abstract
In order to study the driver visual behavior in highway extra-long tunnel section, the paper used Smart Eye Pro5.7 Eye Tracking System to record the driver’s eye movement data, analyzed eye movement index, such as pupil area, X sight angle, Y sight angle, percentage of fixation times, percentage of fixation time and mean fixation time. The results showed that the driver’s pupil area changes rapidly to adapt brightness variation in the entrance and exit of the tunnel. After entering the tunnel, the psychological state of drivers tends to be stable, and there is a tendency of gradual relaxation. Drivers are more focused and look down.
A Summary of Research on Wide-area Distributed Electric Vehicle and Grid Interaction Technology
Authors: Shuanglong Shi , Zhe Yan , Shuaihua Li , Yuheng Xing , Zhengtao Jiang , Huan Xie 
Published: July 2019

Abstract
Electric vehicle charging behavior and grid interaction technology, including the impact assessment of electric vehicles for distribution networks and the planning and operation optimization of electric vehicles connected to the grid.Specifically, the main contents include: researching the agglomeration characteristics of large-scale electric vehicle charging behavior based on statistical data and charging history data, and evaluating the regulatory potential of large-scale electric vehicles; wide-area coordination strategy and station-level and regional-level orderly charging.The interaction mode and architecture, the hierarchical control strategy of large-scale electric vehicle charging behavior and grid interaction.
Global political economy of rare earths: changing positions of major market actors including China, European Union, Japan and United States
Authors: Yan Guangli , Zhongxue LI 
Published: July 2019

Abstract
The availability of rare earth elements became a global concern in 2010 when prices soared after China restricted exports of these metals. What measures can or should states or companies adopt to secure a supply of certain scarce resources where the control of the supply is dominated by only a few nations? This problem is becoming increasingly urgent in the case of rare earths because the global demand for these minerals continues to increase. We investigated the policy measures that countries that are major consumers of rare earths have taken when facing supply disruptions, including China, the European Union, Japan, and the United States. We found that strengthening research and development (R&D) and innovation became the first choice of these countries; in addition, market solutions helped to mitigate the supply risk. The supply disruption caused by China’s restrictions on the export of rare earths in 2010 dissipated a year later; this was caused by recycling and more efficient use of these metals and by initial steps to create new sources or alternative products. This event illustrates that both R&D and innovation are the most important elements related to industrial success rather than administrative interventions.
Removal of tar from coke oven flue gas by emulsion liquid membrane
Authors: Zhang Junjie , Dong Pengxiong , Li Chunying , Li Hongxia 
Published: July 2019

Abstract
The new method for removal tar from coke oven flue gas by emulsion liquid membrane was developed. The W/O emulsion was prepared by using kerosene as organic solvent, L-113B as surfactant, water as internal phase and external phase, respectively. The optimum operating conditions were obtained: The optimum experimental conditions of the ELM process for initial tar concentration of 62.5 mg/L are: absorption time: 40 min; concentration of L-113B: 4% (v/v); emulsification speed: 4000 r/min; volume ratio of emulsion to external water phase: 1:4; gas flow rate: 100 mL/min; stirring speed: 630 r/min; volume ratio of oil phase to internal phase: 1:1. The efficiency of tar removal was about 98 % at optimal operating conditions.
Numerical Study of AlN Growth in MOCVD Heated by Induction
Authors: Lu Ligen , Li Zhiming , Zhao Lili , Guo Runqiu , Feng Lansheng 
Published: July 2019

Abstract
In this paper, the process of growing aluminum nitride(AlN) film in the metal organic chemical vapor deposition(MOCVD) reactor heated by induction was simulated, and several important factors affecting the growth rate were analyzed. The purpose of this study is to explore the relationship between these factors and the growth rate of AlN films, and to provide feasible guidance for the parameter optimization of the growth of AlN film. It was concluded that compared with the pure nitrogen(N2) or hydrogen(H2) as the carrier gas, the growth rate was obviously improved under the conditions of using the mixed carrier gases composed of N2 and H2. In addition, the uniformity of AlN film and the growth rate can be improved with the increase of H2 ratio. It was also found that the growth rate of the film gradually decreased with the increased temperature of the gases introduced into the reactor, but the uniformity increased. Dimer is the main growth precursor of the film. In the parasitic reaction, the trimer has the greatest influence on the film, and the concentration of the polymer is more susceptible to temperature changes.
Design and Research of a New Type of Solar Energy Heat Collection and Heat Exchange System Based on Oil-water Graded Heat Conduction
Authors: Liu Denghua , Zhang Peng , Liu Xuetao 
Published: July 2019

Abstract
A low-carbon society and a low-carbon economy have become a new target for development. In China, construction, industry, and transportation energy consumption take up the major role in the overall energy consumptions. In addition, the present heating technology has a low efficiency with large coal consumption and heavy damage to the environment and damage. Investigation shows that northern China boasts rich solar energy resource, making it suitable for promoting solar heating system, which can bring better economic and social benefits. Research found out a new solar heat collection and exchange system based on oil-water grading heat conduction. It can effectively reduce the conventional energy consumption of the building to achieve low carbonization and even zero energy consumption.
Energy storage configuration for smoothing the output volatility of PV power generation
Authors: Xu Zhicheng , Yuan Bo , Liu Jun , Zheng Kuan , Xu Shenzhi 
Published: July 2019

Abstract
The volatility of photovoltaic (PV) power generation affects its schedulability and friendly grid connection. Energy storage as a highly flexible and controllable regulation resource is regarded as a key technical means to smooth PV power output. This paper proposes a BESS power and capacity determination method based on the definition of maximum PV power volatility and gives an empirical formula for determining the energy storage capacity under different levels of PV output volatility. Furthermore, the determination of BESS under different maximum power volatility constraints and installed capacity of PV plants is also studied. It provides a reference for the actual energy storage planning with different renewable energy penetration levels, which is conducive to the friendly grid connection and dispatch of renewable energy power generation.
Study on the Validity of NOX Uniformity Thermal State Optimization Adjustment Strategy for SCR Denitration Unit of Coal-fired Power Plant
Authors: Yu Honghai , Wang Zhi , Li Chao , He Fengyuan , Qu Litao , Wang Dexin , Qi Xiaohui , Du Jia 
Published: July 2019

Abstract
In order to make the NOx stable discharge standard after the ultra-low emission reform of coal-fired power plants, SCR denitration unit safe and economical operation. Taking a 600MW unit as the research object, the effectiveness of the NOx uniformity thermal state optimization adjustment strategy at the outlet of the denitration unit was studied, and the denitration unit inlet and outlet flow fields and NOx concentration field were tested to analyze the existing problems and formulate an optimization plan. The thermal state optimization adjustment, the NOx uniformity of the denitration unit outlet is significantly improved, the standard deviation of the NOx concentration at each outlet of the load section is reduced to below 15% and the ammonia escape concentration is reduced to below 3ppm. The research shows that the thermal optimization adjustment strategy is reliable and effective for improving the NOx uniformity of the SCR denitration unit, and the unit can operate safely and economically.
The effect of various storage condition to maintain Macadamia (Macadamia integrifolia) seeds viability
Authors: Kholibrina C R , Susilowati A , Kusuma Y S , Aswandi  
Published: July 2019

Abstract

Macadamia integrifolia is an exotic species in Indonesia. However, based on planting trials in Lake Toba, this species also well adapted on critical land dominated by Imperata cylindrica and produce high economic value fruits, so that potential as a forest and land rehabilitation tree species and community development. Unfortunately, the information on its seed handling for propagation still very limited. Therefore, our research was conducted to determine the effect of various storage condition to maintain the seeds viability. Research was designed using factorial in complete randomized design with three factors and 36 treatments. Each experimental unit consisted of 15 seeds. Results on variance analysis showed that, interaction of Natrium benzoate and charcoal powder treatment with different storage periods over 3 months (12 weeks) was significant on germination value and growth rate. The interaction effects with different storage conditions and different storage periods over 3 months was significant on 50 % limit of germination. During storage of seed, storage treatment and storage period play an important role in determining seed viability.
Preliminary Study of Local Bacteria Isolates in Decolorizing Liquid Waste from Boiling Process of Batik Industry
Authors: Noviar I , Munir E , Nurtjahja K 
Published: July 2019

Abstract
Liquid waste from boiling process of batik industry contains toxic compounds including wax, dye, soda ash, metal, cloth etc. If it is disposed into the environment without any treatment it will pollute the environment and threaten lives. Several methods to treat liquid waste of batik industry have been implemented, including by physical, chemical, and biological processes. The study to obtain potential bacteria in decolorization of liquid waste from boiling process of batik industry has been initiated. Bacteria were isolated from ditch soil around local batik industry in Medan. Fifteen bacterial isolates were obtained. Screening to obtain potential isolates to decolorize waste was done by culturing the isolates in solid minimal salt media containing increases concentration of liquid waste starting from 25%, 50% to 75%, no any other carbon source added to the media. Six isolates showed the growth in media containing 75% waste. All six isolates were then tested for the growth in minimal salt medium broth containing 75% of waste. Three isolates SP2, SP3, and SP4 exhibited good growth at this waste level media. These isolates were considered as potential bacteria and are subjected to be used for further decolorization analyses. Molecular identification of isolates based on 16S rRNA is also in process.
The effect of bokashi rice straw on the increase in production of three purple sweet potato varieties (Ipomoea batatas L.)
Authors: Ginting Jonatan 
Published: July 2019

Abstract
This research was conducted in the agricultural area of Pasar Kawat Village, Beringin District, Deli Serdangn Regency, North Sumatra Province, Indonesia. Conducted from June to November 2015. The study aimed to find purple sweet potato varieties that produced high and optimal bokashi rice doses. The experimental design used was a randomized block design with two treatment factors and three replications. The first treatment factor is the variety consisting of : Antin - 1, Antin - 2 and Antin - 3. The second treatment factor is the bokashi dose of rice straw consisting of four treatments: 0 tons/ha, 5 ton/ha, 10 tons/ha, and 15 tons/ha . The results showed that the highest variety of purple sweet potato which gave the highest production was found in the treatment of Antin 2 varieties and bokashi doses of rice straw 5 tons/ha with tuber production that could be achieved 908.07 g/plot (4.54 tons/ha).
The effect of the additional of Moringa leaves flour (Moringa oleifera) on the physicochemical properties of cup cake from composite flour
Authors: Nurminah Mimi , Sinaga Hotnida , Gultom Nelly Sahrina 
Published: July 2019

Abstract
Moringa leaf (Daun kelor) is a local plant that can be used for food and medicine in Indonesia, like vegetable and drug for bone. This study was to find nutritional of cup cake made from mocaf and wheat flour with the additional of Moringa leaves flour and to find the formulation of making cup cake. This research was performed using completely randomises design. Addition moringa leaves flour had effect on phisicochemical properties of cup cake. The best cup cake was made from 100% of wheat flour and 0% mocaf flour and the additional of 2% Moringa leaves flour.
Bioinformatics approach of predicted polyprenol reductase in Durian (Durio zibethinus Murr.)
Authors: Basyuni M , Hayati R , Sihaloho M A , Slamet B , Bimantara Y , Habsyah T S , Hanafiah D S , Julianti E 
Published: July 2019

Abstract

Durio zibethinus Murr. (Malvaceae) is well known to produce secondary metabolites and has been described to contain several biological activities. The present study reports the bioinformatics approach to determine ten probably polyprenol reductase from durian (Durio zibethinus Murr.). The length of the gene was varied from 1313 to 1702 bp with protein length from 317 to 412 amino acid. Several physicochemical parameters of polyprenol reductase in D. zibethinus were varied among the genes observed. Based on stability coefficients, ten D. zibethinus genes were unstable proteins except for X5 variant. The genes were mostly stored in the plasma membrane, chloroplast thylakoid membrane, Golgi body, and endoplasmic reticulum (membrane). In contrast to this observation, a few genes existed to the microbody (peroxisome), mitochondrial inner membrane, and endoplasmic reticulum (lumen). To clarify the homology in the group of the polyprenol reductase gene in D. zibethinus, a dendrogram tree was constructed. A clustering showed that polyprenol reductase in D. zibethinus consisted of three branches. The present results indicated the prominence of understanding the disparity and function of physical and chemical features of the different amino acids in plant polyprenol reductase genes in D. zibethinus.
Mangrove vegetation supports milkfish production in silvofishery pond
Authors: Basyuni M , Nasution KS , Bimantara Y , Hayati R , Slamet B , Sulistiyono N 
Published: July 2019

Abstract
The present study reports mangrove vegetation to support the milkfish (Chanos chanos) production in the silvofishery pond. This study aimed to determine the relationship between the densities of mangrove vegetation on C. chanos cultivation in a silvofishery pond and to determine the factors that influence milkfish production. 10,000 milkfish fries with a size of 3-4 cm were cultivated for six months in the silvofishery pond on sapling and seedling density based. The collection of milkfish production data was observed when harvesting was carried out. There are three mangrove vegetation inside the pond detected, including Rhizophora apiculata, R. mucronata, and Avicennia marina. Average water temperature measured in sapling dominance pond was 29-31.5 °C and seedling dominance pond 2 was 3031.5 °C. The density of mangrove sapling domination was 870 individual, 265 fish average weight of 147.4 g/milkfish yielding 39.1 kg while on seedling dominance has a density of mangrove of 695 individuals, with the level of fish was 436, average fish weight 95 g/milkfish yielded 41.4 kg. This research provided consideration for decision makers in implementing sustainable mangrove management policies.
DNA extraction from Ganoderma isolates of PT Socfindo collections
Authors: Hayati R , Basyuni M , Purba A , Arifianto D , Syahputra I , Chalil D , Bimantara Y 
Published: July 2019

Abstract
Method of CTAB (cetyltrimethylethylammonium bromide) is prevalent for low-cost DNA extraction with many published variations for other plants and tissues, including fungi Ganoderma. The quantity of DNA extracts from the Ganoderma sp fungus from a coconut tree and rubber tree with concentration extraction efficiency and the quality of purity wholeness varied with different DNA characterizations. DNA purity was measured using UV spectroscopy, where a ratio of 260 nm, 280 nm 320 nm was an indicator of different contaminants. The quantity of DNA from the isolate is indicated by 31 ng/ul until 133 ng/ul and range of ratio from 1,279 until 3,6654. The DNA extraction quantity ratio value obtained is below, and above the average, for absorbance 260 nm, 280 nm and 320 nm varies between 1.5 until 1.8 which is an indicator of DNA purity. Pure DNA isolate without contaminants is only found in sample isolate Ganoderma sp 141.1 from coconut tree with a ratio value of 2.2707. Furthermore on the other samples thought to be still contaminated with phenols, salts, proteins, polysaccharide or RNA still co-extracted with phenolic acid (chloroform phenol).
Selection of Character of Yield Component in M2 Aromatic Rice Mutant
Authors: Okasa A M , Sjahril R , Riadi M 
Published: July 2019

AbstractToraja has diversity of rice germplasm. Aromatic rice is very popular today because of its good quality and fragrant aroma. However its long harvesting period is not comparable to its low yield (2-3 ton ha-1) in 6 month planting season. Efforts to increase production through mutation breeding has been proposed here. The aim of this study is to evaluate the effect of 19 mutant (M2) lines on yield atributes.The study was conducted at Alla District, enrekang regency, South Sulawesi from May to October 2017 using mass selection method consisting of two irradiation treatments, namely: irradiation with Carbon ion dose 150 Gy (PB-C), irradiation with 10 Gy Argon ions (PB-A), and control as a comparison. The result showed that lines that have the best production components is PB-A-14.2.14. Whereas, there are 14 lines that have better production components than controls. Cluster analysis showed that there were 3 main componenets of lines formed into further 5 sub-groups with similarity level 66.67%.
Preliminary Phytochemical, Antioxidants, and Antibacterial Properties of Eucalyptus Aqueous Leaf Extract Against Streptococcus pyogenes
Authors: Syukri Dwi Marlina , Nwabor Ozioma , Ergantara Rani Ismiarti 
Published: July 2019

AbstractStreptococcus pyogenesis one of the exclusive human pathogenic bacterial, it causes diverse diseases such as pharyngotonsillitis, impetigo, necrotizing fasciitis, bacteremia or sepsis, and often leads to complications such as acute rheumatic fever and glomerulonephritis. In this study, the antimicrobial activity ofEucalyptusaqueous leaf extract against 15 clinical isolates ofStreptococcus pyogenesand reference strain DMST 17020 was evaluated using the standard microdilution technique.Eucalyptusshowed antibacterial activity against all the isolates with minimum inhibitory and minimum bactericidal concentrations of 64μg/ml and 64256 μg/ml respectively. The extract further showed free radical scavenging ability as detected using DPPH and ABTS assays. Phytochemical analysis of the extract revealed the presence of bioactive compounds.
Biodegradation process of crude oil and bioemulsifier activity by a bacterial consortium culture
Authors: Rangkuti M N S , Idramsa  , Pulungan S S 
Published: July 2019

Abstract
This study reports the analysis of biosurfactant production by a bacterial consortium culture (CC) during biodegradation of crude oil. The ability of CC (5% v/v), grown in Minimal Medium (MM) added with 1% (v/v) Tapis crude oil, to produce biosurfactant under different incubation times (0, 2, 4, 6 and 8 week) was investigated. Biosurfactant activity was estimated by water surface tension changes and emulsification index (E24). Maximum biosurfactant production was observed at 2 weeks incubation period, after which the yield gradually decreased. The biosurfactant produced by the CC significantly decreased the surface tension of water from 72 dynes/cm to 52 dynes/cm (p < 0.05) at week 4. Emulsification test indicated that this biosurfactant effectively emulsified the crude oil with an emulsification index (E24) of 85% (p < 0.05). This is significantly better (p < 0.05) when compared to other chemical surfactants tested namely SDS (53.3%), Tween-20 (50.8%) and Triton X-100 (55%). These results indicate the capability of CC to produce biosurfactant during crude oil degradation and this can be exploited for enhanced bioremediation in oil contaminated areas.