Showing 7,961 - 7,980 results of 11,088 for search '"chemical"', query time: 0.07s Refine Results
  1. 7961

    The Earth-Mars Transfer Trajectory Optimization of Solar Sail Based on hp-Adaptive Pseudospectral Method by Yufei Guo, Dongzhu Feng, Xin Wang, Cong Li, Yunzhao Liu

    Published 2018-01-01
    “…Solar sails have many advantages over traditional chemical propulsion spacecraft, such as needlessness of fuel, high payload ratio, long service life, and great application potential in deep space exploration, interstellar voyage, and other aerospace application fields. …”
    Get full text
    Article
  2. 7962

    Analysis of Hydrogeochemical Characteristics of Tunnel Groundwater Based on Multivariate Statistical Technology by Chen Peng, Yuanming Liu, Huiyu Chen, Qiaowei Yuan, Qingzhi Chen, Shilong Mei, Zhonghu Wu

    Published 2021-01-01
    “…According to the mineral saturation index calculations, the dissolution and precipitation of minerals such as alum, gypsum, calcite, dolomite, and salt rock have an important influence on the main chemical components in water. The 38 samples were subjected to cluster analysis, and the results could be classified into seven categories. …”
    Get full text
    Article
  3. 7963

    Isolation and Structural Identification of New Diol Esters of Okadaic Acid and Dinophysistoxin-1 from the Cultured <i>Prorocentrum lima</i> by Yeong Kwang Ji, Semin Moon, Sangbum Lee, Yun Na Kim, Eun Ju Jeong, Jung-Rae Rho

    Published 2025-01-01
    “…In this study, we report the isolation of four new diol esters of OA/DTX-1 from large-scale cultures of <i>Prorocentrum lima</i>. Their chemical structures were elucidated through comprehensive NMR and MS analyses, along with structural comparisons with the well-known OA. …”
    Get full text
    Article
  4. 7964

    Treatment of Wastewater from Thermal Desorption for Remediation of Oil-Contaminated Soil by the Combination of Multiple Processes by Feng Xiao, Jun Yin, Dongsheng Shen, Ting Chen, Li Lv

    Published 2022-01-01
    “…The combined process was optimized, and the maximum chemical oxygen demand (COD), NH3-N, turbidity, and extractable petroleum hydrocarbons (EPH) removal efficiencies reached 93.3%, 79.8%, 97.6%, and 99.9%, respectively. …”
    Get full text
    Article
  5. 7965

    Morphological Effect of CNT/TiO2 Nanocomposite Photoelectrodes Dye-Sensitized Solar Cell on Photovoltaic Performance with Various Annealing Temperatures by Mohd Zikri Razali, Huda Abdullah, Izamarlina Asaahari

    Published 2015-01-01
    “…The results show the improvement of the chemical and electrical properties of the solar cells annealed at different temperatures. …”
    Get full text
    Article
  6. 7966

    Silvicultural Attempts to Induce Browse Resistance in Conifer Seedlings by Bruce A. Kimball, Fred Pfund, Mark Gourley, Doreen L. Griffin, John H. Russell

    Published 2011-01-01
    “…Fertilization and sulfur treatments had a moderate impact on growth and no influence on browse damage or the chemical responses. Over the course of the study, browse damage diminished while foliar monoterpene concentrations increased in redcedar. …”
    Get full text
    Article
  7. 7967

    Striving for consistency in a national lake assessment: Defining reference status and littoral macroinvertebrate condition in lakes across the conterminous United States by Richard M. Mitchell, Alan T. Herlihy, Robert M. Hughes

    Published 2025-01-01
    “…As part of that process, we identified least-disturbed ecoregional reference lakes by filtering all sampled lakes by using specific physical, chemical, and disturbance variables to remove disturbed lakes. …”
    Get full text
    Article
  8. 7968

    Safeguarding forest ecosystems: harnessing IoT for fire detection by Iman Atighi, Zhi Zhou

    Published 2023-12-01
    “…This paper explores the utilization of IoT-enabled WSNs in forest fire detection, with a specific focus on the sensor nodes' ability to monitor environmental parameters such as temperature, pressure, and humidity, as well as chemical indicators including Carbon Monoxide, Carbon Dioxide, and Nitrogen Dioxide. …”
    Get full text
    Article
  9. 7969

    Drug allergy by Samira Jeimy, Tiffany Wong, Moshe Ben-Shoshan, Ana Maria Copaescu, Ghislaine A. C. Isabwe, Anne K. Ellis

    Published 2025-01-01
    “…When available, alternative medications with unrelated chemical structures should be substituted. Cross-reactivity among drugs should also be taken into consideration when choosing alternative agents. …”
    Get full text
    Article
  10. 7970
  11. 7971

    Temporal Aspects of Surface Water Quality Variation Using Robust Statistical Tools by Adamu Mustapha, Ahmad Zaharin Aris, Mohammad Firuz Ramli, Hafizan Juahir

    Published 2012-01-01
    “…Partial correlation results revealed that there are strong (rp=0.829) and moderate (rp=0.614) relationships between five-day biochemical oxygen demand (BOD5) and chemical oxygen demand (COD), total solids (TS) and dissolved solids (DS) controlling for the linear effect of nitrogen in the form of ammonia (NH3) and conductivity for dry and wet seasons, respectively. …”
    Get full text
    Article
  12. 7972
  13. 7973
  14. 7974

    Characterization of Polylysine Enriched Self-Adhesive Resin Cements by Zainab M. Mansi, Abdulla MW Al-Shamma

    Published 2023-01-01
    “…FTIR showed that PLS addition did not change the functional groups’ peaks for either cement type indicating that no chemical reaction with and/or alteration within the cement has occurred. …”
    Get full text
    Article
  15. 7975
  16. 7976

    Plankton diversity and aquatic ecology of a freshwater lake (L3) at Bharti Island, Larsemann Hills, east Antarctica by Pawan K. Bharti, U.K. Niyogi

    Published 2015-04-01
    “…Water sample was collected from a freshwater lake during XXXth Indian Scientific Expedition to Antarctica (ISEA) and analyzed for the physico-chemical parameters, major elements, trace metals and major plankton diversity in surface lake water by following standard methodology. …”
    Get full text
    Article
  17. 7977
  18. 7978
  19. 7979
  20. 7980

    Copolymer Based on Polyglycerol-Acrylate-Lactate as Potential Water Viscosifier and Surfactant for Enhanced Oil Recovery by M. P. Amaya-Gómez, L. M. Sanabria-Rivas, A. M. Díaz-Lasprilla, C. Ardila-Suárez, R. H. Castro-García, H. I. Quintero-Pérez, G. E. Ramírez-Caballero

    Published 2020-01-01
    “…The copolymers were synthesized using a polyglycerol backbone, acrylic acid, lactic acid, and oleic acid. The chemical structure of copolymers was characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetry (TG), and differential scanning calorimetry (DSC). …”
    Get full text
    Article