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  • Journals  (1)
  • Articles  (41,683)
  • Institute of Physics (IOP)  (41,684)
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  • Journals  (1)
  • Articles  (41,683)
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  • 1
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    Configurations and Membranes of Photocatalytic Membrane Reactors for Water and Wastewater Treatment (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-12-21
    Description: The new photocatalytic membrane reactor composed of photocatalysis and membrane separation not only has the advantages of combination, but also can effectively solve the separation problem of harsh system and recover the catalyst particles in wastewater treatment. Especially, the coupling system greatly improves the efficiency of treatment of high concentration organic wastewater. In this paper, the structure and operation mode of different types of photocatalytic membrane reactors are studied and prospected.
    Print ISSN: 1755-1307
    Electronic ISSN: 1755-1315
    Topics: Geography , Geosciences , Physics
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  • 2
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    Effects of Different Soil Moistures on the Yield, Water Use Efficiency of Solar Greenhouse Tomatoes in Liaoning, China (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-12-21
    Description: Developing water-saving irrigation is an important guarantee for the sustainable development of agriculture. And the research of how to use limited water resources to obtain the best yield, water use efficiency is a hot topic at present. In this paper, the optimum irrigation schedule is achieved by setting different water treatment schemes, optimizing the tomato yield, water use efficiency indexes. The result shows, when soil water rate is controlled within 70%∼75%, 60%∼65%, 80%∼85%, 75%∼80% of field capacity respectively in different developing stages, the tomato yield is the highest, which can reach 54050. 27kg/hm 2 ; the water use efficiency is the highest, which can reach 27. 1kg/m 3 ; and it is the best water-saving, high-yield, high-quality planting treatment.
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    Topics: Geography , Geosciences , Physics
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  • 3
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    Dynamic Prediction Model for Multi-influence Factors of Hurricane Intensity (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-12-21
    Description: In recent years, the global hurricane has intensified, which not only has a certain impact on the climate, but also has a great impact on human living environment and social and economic development. Therefore, the prediction of hurricane intensity plays an extremely important role in current climatic conditions and human development. In order to understand the change of hurricane intensity, the sea surface temperature, vertical wind shear, ocean heat content, Coriolis parameters, low-level relative vorticity and other factors are used as related factors affecting hurricane intensity. In this paper, the dynamic weighted evaluation model is combined with the Borda number to establish a hurricane intensity evaluation model, and then the hurricane intensity under the influence of various influencing factors is predicted. At the same time, in order to more clearly reveal the specific impact of various factors on the hurricane, this paper uses the Arcgis platform for mapping, which i...
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  • 4
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    Crops and consumer preferences of 20 local rice genetic resources of Yogyakarta, Indonesia (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-12-21
    Description: The local genetic resourcesof rice was natural resources that need to be preserved from extinction. The aim of this research was to know the crop’s preference and consumer preferences of20 local rice of genetic resources from Yogyakarta. The study was conducted from July to October 2016 in Selomartani, Kalasan, Sleman, Yogyakarta, Indonesia. The research was conducted by planting 20 local rice genetic resources of repeated twice, using Integrated Crop management (ICM) with legowo planting system. Observations of plant performance included plant height, plant age, number of productive tillers, panicle length, leaf length, leaf width, grain amount of fill per panicle, 1000 grain weight and production. Data were analyzed using SAS software version 9.Consumer preferences for cropping are conducted directly with farmer, extension and related stakeholders’ meetings on the level of consumer preference for agronomic cultivation of the local rice crops and to disseminate of specific loca...
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  • 5
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    Biochar: effects on crop growth (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-12-21
    Description: Excessive tonnage of agricultural wastes from annual and field crops are generated yearly in Malaysia. The improper treatment such as open burning of residual biomass after the harvesting of rice plantcan affect global warming. The processing of agricultural wastes into biochar through pyrolysis has gained tremendous interest globally. A field trial to compare effectiveness on rice growth of variety MR 263 using rice husk and paddy straw biochar was determinedby application of four different rates of biochar 300 g, 600 g, 900 g and control (without biochar). Plant growth analysis based on average plant height was optimum with addition of 900 g rice husk biochar. A greenhouse trial using oil palm and rubber seedlings as indicatorswith application of 0, 10, 20, 30, and 40 g rice husk biochar and paddy straw biochar to the soil showed the highest plant height for treatment with 10 g biochar, ranging from 64.7 to 68.9 cm. Plant heights were slightly lower at higher levels of biochar...
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  • 6
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    The impact of horticulture farming practices in Andisols forest on organic-P content, Tawangmangu, Central Java (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-12-21
    Description: This research aimed at studying the change of organic-P status as an impact of horticultural farming in Andisols forest. Horticulture is an alternative agricultural practice which mainly develops in upland nowadays. However, the presence of this agricultural practice significantly influences on soil chemical properties, at most organic P-content. This research was conducted at five observation sites in the southern slope of Lawu Mountain, Tawangmangu, Central Java. Horticulture farming in this area has been developed for more than 25 years with organic manure application mainly derived from cow dung. This organic manure is applied for 15–25 Mg Ha −1 yr −1 . The Andisols in Lawu forest is mostly covered by Pine ( Pinus merkusii ) and the predominant horticulture vegetation developed in this area is Carrots ( Daucus carota ). The soil sampling was conducted through five replications for each site. The results showed a significant decreasin...
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  • 7
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    CO 2 emissions from industrial sector in Fujian Province, China: A decomposition analysis (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-12-21
    Description: Industries of Fujian Province use more energy than any other sectors and it is important to explore both the characteristics and reduction potential of their CO 2 emissions. A decomposition analysis based on the LMDI method during 2005-2016 is performed to investigate the main driving forces behind energy-related CO 2 emissions variations in Fujian Province, China. We find that raw coal, crude oil and electricity are ranked in the top three CO 2 emissions. The proportion of CO 2 emissions from raw coal still accounts for the largest proportion of CO 2 emissions from all types of energy. The total CO 2 emissions of industrial energy consumption increased from 44.27 million tons (Mt) in 2005 to 88.51 Mt in 2016. The industrial scale effect is the main driving factor for the growth of CO 2 emissions in Fujian industry sector. The energy intensity effect is the main inhibitor of the growth of CO 2 emissi...
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  • 8
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    The distribution of iron sand on surface substrate of Leungah fluvial system, Aceh Besar, Indonesia (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-12-21
    Description: Iron sand content is obviously observed at Leungah River which downstream into the beach. The study examines the distribution of iron sand at the surface around the coast and river sediment of Leungah. Data sampling was done on February 2017, a total of 20 stations with each of 10 sampling locations are stationed in the river and coastal areas. Sediment samples were collected by applying a coring method using a PVC tube with a diameter of 2.5 inches and a thickness of 15 cm from the surface. The sorting of the sediment samples by its grain size was done by using a wet sieving method consist of: 2 mm; 1 mm; 0.5 mm; 0.25 mm; 0.125 mm; 0.063 mm; 0.038 mm. The magnetite content is sorted from the bulk sediment from each sieve level using a neodymium n35 strong magnet and then weighed. The results showed that magnetite concentrations in surface sediment were found to be higher in the coastal areas than in the river area. Meanwhile, the coarsest magnetite grains were found in the uppe...
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  • 9
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    Sorption of cadmium by rice husk char, bamboo char, and coconut shell char in aqueous solutions (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-12-21
    Description: Cadmium (Cd) is a byproduct of zinc production. It has a high solubility, mobility and biological accumulation leading to a risk of bone and kidney damage after long-term exposure. Sorption is an effective method to treat Cd-contaminated water. As a great potential contaminant sorbent, biochar can be produced from rice husk, coconut shell and bamboo under their respective optimum conditions for the sorption of toxic metal ions were used as representatives. Sorption models of kinetics and isotherms were used to fit the experimental results. Pseudo-first-order models fitted the data better than pseudo-second-order for all types of biochar. The Cd 2+ sorption capacity of coconut shell char and bamboo char was higher than rice husk char (7.3723 mg/g ≈ 7.3835 mg/g 〉 5.0345 mg/g). Freundlich model fitted the results of coconut shell biochar and bamboo biochar better than Langmuir model, which indicate a strong bond for Cd 2+ sorption. In contrast, for rice husk ...
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  • 10
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    Araguspongine: an indole alkaloid as panc-1 cell inhibitory adapted to nutrient starvation from Indonesian’s marine sponge spongionellapulchella (2018)
    Institute of Physics (IOP)
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    Publication Date: 2018-12-21
    Description: Isolation of active metabolite from Indonesian’s Marine Sponge Spongionellapulchella has been conducted on July 2018. Active compound isolated based on bioassay-guided separation with several steps of chromatography. The rate of viability shows that IC 50 = 0.2 μg / mL against PANC-1 cell. The active compound know as C 28 H 51 N 2 O 2 determined by LCMS-ESI with molecular weight [M+H] + 447.3951m/z. Based on the FTIR spectrum shows that the active metabolite has functional groups at 3435.56 cm 1 as N-H secondary amines, 2853.39 cm 1 as C-H methyl, 2769.64 cm 1 as C-H methylene and the fingerprint region of amine at 1637.27 cm 1 as C-N imine. The active compound which knows as araguspongine, an indole alkaloid shows potential activity against PANC-1 cell.
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