Showing 261 - 280 results of 408 for search '"reagent"', query time: 0.08s Refine Results
  1. 261

    Alkene Cleavage Catalysed by Heme and Nonheme Enzymes: Reaction Mechanisms and Biocatalytic Applications by Francesco G. Mutti

    Published 2012-01-01
    “…Ozonolysis requires harsh conditions (−78°C, for a safe process) and reducing reagents in a molar amount, whereas the use of poisonous heavy metals such as Cr, Os, or Ru as catalysts is additionally plagued by low yield and selectivity. …”
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    Article
  2. 262

    RESEARCH OF THE CLEANING PROCESS REGULARITIES FOR THE MODEL WASTE WATER SYSTEMS WITH THE «VODOKANALNY» POLYACRYLAMIDE FLOCULANT by Eugeniya Y. Shachneva, Viktor Y. Khentov

    Published 2020-08-01
    “…Graphical dependences of the described quantities on the concentration of introduced reagents are given. The clarification rates of suspensions in the presence of polyelectrolytes were investigated. …”
    Article
  3. 263

    Using of aluminium slags and products of their pro‑cessing in metallurgical production by L. V. Tribushevskiy, B. M. Nemenenok, G. A. Rumiantseva, A. V. Arabey

    Published 2021-12-01
    “…It has been shown that the bulk of reagents derived from secondary aluminum production wastes (APWs) are used with increased sodium and potassium chloride. …”
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  4. 264

    Synthesis and Reactions of Five-Membered Heterocycles Using Phase Transfer Catalyst (PTC) Techniques by Ahmed M. El-Sayed, Omyma A. Abd Allah, Ahmed M. M. El-Saghier, Shaaban K. Mohamed

    Published 2014-01-01
    “…They are known to accelerate reaction rates by facilitating formation of interphase transfer of species and making reactions between reagents in two immiscible phases possible. Application of PTC instead of traditional technologies for industrial processes of organic synthesis provides substantial benefits for the environment. …”
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    Article
  5. 265

    Environmental Method to Determine Dopamine and Ascorbic Acid Simultaneously via Derivative Spectrophotometry by Ahmed M. El-Zohry, E. Y. Hashem

    Published 2013-01-01
    “…These obtained methods could be used to determine both reagents in real and synthesized samples.…”
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    Article
  6. 266

    Syntheses of Marine Natural Products via Matteson Homologations and Related Processes by Uli Kazmaier

    Published 2025-01-01
    “…In contrast, in Aggarwal’s lithiation-borylation strategy, new chiral auxiliary reagents must be used in each reaction step, which on the other hand allows the individual insertion of the desired stereogenic centers. …”
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    Article
  7. 267

    Miniaturization and characterization of patient derived hepatocellular carcinoma tumor organoid cultures for cancer drug discovery applications by David A. Close, Paul A. Johnston

    Published 2025-01-01
    “…Hoechst and live/dead reagents provided organoid numbers and viability comparisons. …”
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  8. 268

    Syntheses of 2-(6’-Fluorobenzothiazol-2’-ylamino)-4, 6-(disubstituted thiouriedo)-1,3-pyrimidine Derivatives as Antimicrobial Agents by Anoop K. Pathak, Viney Chawla, Shailendra K. Saraf

    Published 2011-01-01
    “…A new series of 1,3-pyrimidine derivatives (3a-f) have been synthesized by reacting 2,4,6-Trichloropyrimidine with nucleophilic reagents 2-amino-6-fluorobenzothiazole (1) in the presence of acetone. …”
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    Article
  9. 269

    Theoretical Analysis of the Mechanism of the 1,3-Dipolar Cycloaddition of Benzodiazepine with N-Aryl-C-ethoxycarbonylnitrilimine by Khadija Nabih, Mohamed Maatallah, Abdesselam Baouid, Abdellah Jarid

    Published 2020-01-01
    “…The two C=N sites of 2,4-dimethyl-3H-1,5-benzodiazepine are easily reached by the dipole, and the energy barrier between the reagents and the transition states is too weak. The secondary barriers are traversed by the heat released in the reaction medium after the crossing of the first TS, which facilitates the addition reaction and does not require high energy. …”
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  10. 270

    Effect of PdS on Photocatalytic Hydrogen Evolution of Nanostructured CdS under Visible Light Irradiation by Qingyun Chen, Cheng Suo, Shu Zhang, Yunhai Wang

    Published 2013-01-01
    “…With PdS highly dispersed in the CdS nanostructures, the photoactivity was evaluated by hydrogen evolution from aqueous solution containing Na2S/Na2SO3 as sacrificial reagents under visible light irradiation. When the concentration of PdS was 1% by weight, PdS/CdS, prepared by the in situ coprecipitation, showed the highest photocatalytic activity, while that prepared by hydrothermal method showed the most stability for hydrogen evolution. …”
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  11. 271

    Application of Statistical Experimental Design and Surface Plot Technique to Optimize Oxygenated Apatite Synthesis by Soumia Belouafa, Hassan Chaair, Khalid Digua

    Published 2020-01-01
    “…An experimental design is applied to precise the influence of the synthesis parameters (pH of the reaction medium, atomic ratio Ca/P of the reagents, concentration of the calcium solution (Ca2+), temperature of the reaction medium (T), and duration of the reaction (D)) on the chemical composition (Ca/P molar ratio, % O2, and % O22−). …”
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  12. 272

    Research Progress on Mechanoenzymatic Reactions by CUI Tianyu, XIN Jiaying, SUN Lirui, LI Yue, LIU Jingxue, ZHANG Jianxiong, XIA Chungu

    Published 2024-12-01
    “…Organic synthesis reactions typically use a large amount of chemical reagents and require strict reaction conditions and complex downstream operations to separate and purify products, which should be used sparingly or not at all in foods. …”
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    Article
  13. 273

    Application of Autofluorescence Endoscopy for Colorectal Cancer Screening: Rationale and an Update by Hiroyuki Aihara, Hisao Tajiri, Takeshi Suzuki

    Published 2012-01-01
    “…Autofluorescence endoscopy (AFE) can detect slight alterations in their distribution and concentration during the colorectal carcinogenesis process and, thus facilitate noninvasive screening colonoscopies without the need for fluorescent substances or staining reagents to be administered. While detecting faint autofluorescence intensity by conventional fiberoptic endoscopy remains challenging, the latest AFE system with high-resolution videoendoscope capabilities enables such detection by using a false-color display algorithm. …”
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  14. 274

    Synthesis and evaluation of antitumor activity of new 4-substituted thieno[3,2-d]pyrimidine and thienotriazolopyrimidine derivatives by Hafez Hend N., El-Gazzar Abdel-Rhman B. A.

    Published 2017-12-01
    “…In addition, compound 12 was used to synthesize thieno[1,2,4] triazolopyrimidine derivatives 14 and 15 and 3-methyl-2-(methyl-sulfonyl)-6-phenyl-thieno[3,2-d]pyrimidin-4(3H)-one (16) through the reaction with the respective reagents. Moreover, the reaction of 16 with 4-phenylenediamine gave 2-[(4-aminophenyl)-amino]-3-methyl-6-phenyl-thieno[3,2-d] pyrimidin-4(3H)-one (17), which reacted with methanesulfonyl chloride to afford N-{4-[(3-methyl-4-oxo-6-phenyl-3H,4H- -thieno[3,2-d]pyrimidin-2-yl)-amino]phenyl}-methanesulfonamide (18). …”
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  15. 275

    Technological Cooperation Networks at Bio-Manguinhos: the Role of Information and Communication Technologies by Lázaro Pereira de Oliveira, Claudio Pitassi, Antônio Augusto Gonçalves

    Published 2015-01-01
    “…This article identifies and discusses the contribution of information and communication technologies (ICTs) to the technological cooperation projects of Bio-Manguinhos, a pharmaceutical manufacturer that belongs to Osvaldo Cruz Foundation (FIOCRUZ), responsible for producing vaccines, reagents and biopharmaceuticals, with priority on meeting the needs of the Brazilian public health system. …”
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  16. 276

    Ultrasonic-Assisted Synthesis of Two t-Butoxycarbonylamino Cephalosporin Intermediates on SiO2 by Feng Xue, Yibin Wei, Shengui Ju, Weihong Xing

    Published 2016-01-01
    “…The advantages of this reaction route including the usage of economical reagents and mild reaction conditions and high isolated yield make the two significant t-butoxycarbonylamino cephalosporin intermediates possible in large-scale production.…”
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  17. 277

    UV Dose Governs UV-Polymerized Polyacrylamide Hydrogel Modulus by Saahil Sheth, Era Jain, Amin Karadaghy, Sana Syed, Hunter Stevenson, Silviya P. Zustiak

    Published 2017-01-01
    “…This method, while generally well accepted, has its drawbacks: long polymerization times, unstable and toxic reagents, and tedious preparation. Alternatively, PAA gels could be made by free radical polymerization (FRP) using ultraviolet (UV) photopolymerization, a method which is quicker, less tedious, and less toxic. …”
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  18. 278
  19. 279

    Synthesis and Characteristics of 1,2,4,5-Tetrazines for Using as High Energy Density Materials (HEDMs) by Sebastian Górecki, Agnieszka Kudelko

    Published 2025-01-01
    “…This review presents methods for constructing 1,2,4,5-tetrazine precursors from acyclic reagents and describes their chemical modifications, leading to new energetic compounds with potential applications in the industry as explosives, propellants, or pyrotechnics. …”
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  20. 280