alkenes alkynes and aromatic compounds

... “Selective Nitration of Aromatic Compounds with Bismuth Subnitrate and Thionyl Chloride,” Molecules, Vol 8, No 7, 2003, pp 593-598 doi:10.3390/80700593 [10] N M Leonard, L C Wieland and R S Mohan, “Applications ... Pathways in Aromatic Nitration,” Acta Chemica Scandinavica, Vol 52, No 1, 1998, pp 11-22 doi:10.3891/acta.chem.scand.52-0011 [13] P T Anastas and J C Warner, “Green Chemistry: Theory and Practice,” ... Nitro aromatic compounds are extensively used as chemical feed stocks for a wide range of materials such as dyes, pharmaceuticals, perfumes, and plastics Therefore, nitration of organic compounds

Ngày tải lên: 02/11/2022, 14:35

... of the molecules and asymmetric twisting of the carboxylic acid group and the phenyl-amino group for M2 and M4 s Rocking of the molecules and Carboxylic-Phenyl group bend of M2 and M4 w Rocking ... Spectrum of PABA 136 Conclusions and Discussions 143 5.4 Chapter Conclusions, Discussions and Future Works 6.1 Conclusions and Discussions 146 6.2 Future Works and Possible Improvements 149 v ... the terahertz (THz) spectroscopic properties of two explosives and related compounds (ERCs), 2,4Dinitrotoluene (DNT) and 2,6-DNT, and a non-ERC, para-Aminobenzoic acid (PABA) THz spectroscopy

Ngày tải lên: 13/10/2015, 15:57

... are called alkenes Alkenes Alkynes  Unsaturated hydrocarbons which contain triple bond between two carbon atoms [...]...Hydrocarbons  Hydrocarbons are compounds of carbon and hydrogen ... to the difference in the arrangement of carbon atoms in diamond and graphite Hydrocarbons  Hydrocarbons are compounds of carbon and hydrogen The natural source of hydrocarbons is petroleum (crude ... hydrocarbons methane, ethane propane and butane form a series of carbon compounds known as alkanes  The alkane series can be represented by the general formula Isomerism  Compounds having the same molecular

Ngày tải lên: 01/12/2016, 23:46

... Life Sciences, Poland Background and objectives: Obesity is important public concerns and there is increasing demand for effective therapeutic strategies Pumpkin, corn silk, and adzuki bean have ... glucose to the formulation was essential and established for the production of hard candy; citric acid was added to sesame hard candy, which was added at the end and in the crystalline state In order ... Schlothauer2, W Cutfield1 Liggins Institute, University of Auckland, Australia Comvita New Zealand Ltd, Te Puke, New Zealand Bacground and objectives: Studies of the metabolic benefits of bioactives

Ngày tải lên: 16/05/2017, 19:45

... sorption and reaction of DMMP and 2-CEES from water vapor The sorption capacities of DMMP and 2-CEES on the MgO/C-1 sample under humid conditions were 61.5 mg/g and 30.4 mg/g, about 91% and 86% ... °C/min and soaking at 220 °C for h, (2) ramping from 220 to 280 °C at 0.8 °C/min and soaking at 280 °C for h, (3) ramping from 280 to 350 °C at 0.8 °C/min and soaking at 350 °C for h, and (4) ... XPS spectra of MgO and MgO/C composites exhibited very clear MgO features The photoelectron peaks at 49.8, 92.2, and 1304 eV corresponded to Mg 2p, 2s, and 1s, respectively, and the O 1s peak

Ngày tải lên: 02/09/2017, 10:00

... related compounds in breast milk of Japanese primiparas and multiparas Chemosphere 38:2461–2466 Johansen HR, Alexander J, Rossland OJ, Planting S, Lovik M, Gaarder PI, et al (1996) PCDDs, PCDFs, and ... calculation of arithmetic mean and TEQ values T4: tetra, P5: penta, H6: hexa, H7: hepta, and O8: octa c All the samples were below detection limit DRCs: Dioxins and related compounds PCBs: Polychlorinated ... 98.8% of exposure to dioxins and that water, soil, and air are not major sources (Travis and Hattemer-Frey 1991) In addition, it has been suggested that residue levels and composition of DRCs in

Ngày tải lên: 16/12/2017, 01:01

... relationships between o, and S,, x, and Q,, are similar to those of T, and T,> P, and R, The number o, can be calculated in terms of Ss , in “terms of Q., while S, and CG are the coefficients ... as a permutation group and H, denote the regular representation of the Abelian group of order p™ and type (p, p) H, and H, are permutation groups of order and degree p™, and they are combinatorially ... the given groups in a transparent way Let 6 and H be two permutation groups with, respectively, orders g and h, degrees r and s, and cycle indices » and ~ Denote by Bip wi (respectively Mi igi

Ngày tải lên: 01/02/2018, 15:59

... London Bhatta, D.D and R.B Rawa, 2001 Policy and Regulatory Environment in Relation of Jaributi Production in Nepal, in BSP/New ERA and EFEA Workshop Proceedings Kathmandu CBS 2002 A Hand Book of Environmental ... Nepal: Aspects of the Trade in Medicinal and Aromatic Plants Forest Research and Survey Centre, Ministry of Forests and Soil Conservation, HMG/N, Kathmandu Kanel, R 2000 Analyzing Policy for Poverty ... development, conservation and management it is difficult to enhance the production of locally available resources on one hand, and not possible to reduce the rate of poverty and environmental deterioration

Ngày tải lên: 14/01/2020, 13:11

... estimation and liver concentration prediction are precise for only certain pseudo compounds, and with smaller SD and narrower intervals, more pseudo compounds can have precisely estimated clearances and ... Concentration and DDI In this example, two sets of different values of hepatic clearance processes (i.e., CLact, CLpass, and CLmet are 10.7, 0.103, and 0.411 L/h for set 1, and 7.69, 0.100, and 55.3 ... synthetic compounds), within which 190 compounds are dropped due to numerical error Among the 810 surviving compounds, 12.7, 11.6, 12.7, and 4.4% have precise predictions on Kpuu, CLact, CLpass, and

Ngày tải lên: 11/05/2020, 11:43

... models and docking studies are also included to emphasize the molecular and structural properties that are essential in the larvicidal activity Materials and methods Compounds tested Fifty compounds ... free energy of the ligand coupled on the protein targets The figures were prepared with ChemBioOffice [42] for the structures and Chimera [43] for the proteins and ligands Andrade‑Ochoa et al ... against larvae (stair III and IV) and pupae of Culex quinquefasciatus Say (Diptera: Culicidae) Compounds were purchased from a Sigma-Aldrich (St Louis, MI, USA) distributor, and its chemical structure

Ngày tải lên: 29/05/2020, 13:36

... farnesyl group and a -CH2-CH2- fragment (at H 1.77 (2H, m, H-3) and 2.70 (2H, dt, J = 7.0, 2.0 Hz, H-4)) were confirmed based on correlations between protons and 224 Xanthones and other compounds ... control and Asample is the absorbance of the tested compounds The IC50 values were calculated from the graph plotted as inhibition percentage against the concentration RESULTS AND DISCUSSION Compounds ... data of 1-4 revealed signals of aromatic protons and carbons, a carbonyl group, prenyl and/or geranyl groups characterized for a xanthonoid skeleton with prenyl and/or geranyl side chains Compound

Ngày tải lên: 28/06/2021, 15:16

... flavonoids, 11 phenolic acids, and lignans and coumarins had significant differences Among them, 40 of these compounds were up-regulated and 13 compounds were down-regulated (Table and Fig 3d) Moreover, ... nucleotides and derivatives, lignans and coumarins, and terpenoids were much more abundant in the root tissue The results of the comparative analysis are shown in Table and Fig There were 44, 87, and ... 0.001, and 0.0001 probability level Where P < 0.05, P < 0.01, P < 0.001, and P < 0.0001 are denoted by *, **, ***, and ****, respectively Graph-Pad Prism 8.0 and MS Excel were used for graphs and

Ngày tải lên: 28/06/2021, 20:32

... of C-C π-Bonds - - Alkene and Alkyne chemistry I  Alkene chemistry Structures and influence of orbitals on reactivity: How alkenes react and why? Typical reactions of alkenes: Nucleophilic reactions ... Effects of π-bond on structure and reactivity Structures of conjugated alkenes and alkynes MO approach to conjugated systems: the allylic cation, allylic radical and butadiene Allylic bromination ... Wothers and Warren, OUP, 2000 Comments, questions and queries welcome  The Chemistry of C-C π-Bonds - - The most important feature of alkenes is the π bond Alkenes possess !-bonds and "-bonds...

Ngày tải lên: 22/03/2014, 20:20

... Approach 39 Ligand and Crystal Field Strength • the strength of the crystal field depends in large part on the ligands strong field ligands include: CN─ > NO2─ > en > NH3 weak field ligands include: ... complex and kinds of ligands  crystal field splitting energy  strong field splitting and weak field splitting Tro, Chemistry: A Molecular Approach 33 Splitting of d Orbital Energies due to Ligands ... McGraw Hill 19 Naming Coordination Compounds 1) List ligand names in alphabetical order  name each ligand alphabetically, adding a prefix in front of each ligand to indicate the number found in...

Ngày tải lên: 28/11/2013, 01:12

... chicken, antimicrobial histones H2A and H2B were isolated from the liver [8], and histones H1 and H2B were identified in the reproductive system [9] In humans, histone H1 and its fragments derived from ... typhimurium [10], and histones H2A and H2B were expressed on the surface of and secreted from amnion epithelial cells [11] A recent report indicated that activated human neutrophils contain and release ... H4-derived peptides H4(86–100) and HN possess bactericidal activity and whether such activity is modified by ATP Herein we report that H4-(86–100), HN and related compounds structure-dependently...

Ngày tải lên: 18/02/2014, 14:20

... Peter-Paul Hoppe, and Lester Packer Environmental Stressors in Health and Disease, edited by Jürgen Fuchs and Lester Packer Handbook of Antioxidants: Second Edition, Revised and Expanded, edited ... Cadenas and Lester Packer Flavonoids in Health and Disease: Second Edition, Revised and Expanded, edited by Catherine A Rice-Evans and Lester Packer 10 Redox–Genome Interactions in Health and Disease, ... and Lester Packer 11 Thiamine: Catalytic Mechanisms in Normal and Disease States, edited by Frank Jordan and Mulchand S Patel 12 Phytochemicals in Health and Disease, edited by Yongping Bao and...

Ngày tải lên: 11/03/2014, 03:20

... between FadD29 and PKS15 ⁄ on the one hand, and FadD26 and the FasI system on the other hand Further investigations, including protein interaction studies and structural studies, will be necessary ... intermediates in DIM and PGL biosynthesis has not been analyzed This study was undertaken to dissect the roles of FadD22, FadD26 and FadD29 in the biosynthesis of DIMs and related compounds Biochemical ... the DIM A and DIM B produced by Mycobacterium tuberculosis and Mycobacterium bovis BCG and of the glycosylated phenolphthiocerol dimycocerosates produced by M tuberculosis (PGL-tb) and M bovis...

Ngày tải lên: 15/03/2014, 11:20

... sheath and auxiliary gas, which were set to 20 and units, respectively The source current was set to lA and the capillary voltage was 49 V Vaporizer and capillary temperatures were 225 and 175 ... b-carotene and to lutein from a-carotene, an isomer of b-carotene containing one b- and one e-ionone ring Aromatic carotenoids (e.g isorenieratene) contain /-rings (Fig 2) Fig Cleavage sites and structures ... (F); lutein (G) and 3,3¢-dihydoxyisorenieratene (H) The substrates were cleaved at the C13-C14 and the C15-C15¢ double bonds Preferred and less targeted sites are shaded in dark and light gray,...

Ngày tải lên: 15/03/2014, 23:20

... instruments, photographic and optical Other manufacturing industries Electricity, gas and steam Water works and supply Construction Wholesale and retail trade and restaurants and hotels Land transport Water ... is currently developing Canada-wide Standards for dioxins and furans and is aiming for virtual elimination of this family of compounds Dioxins and related compounds can be transported a long distance ... dioxin and dioxin-like compounds A TDI of - TEQ pg/kg/day was established for dioxins and dioxin-like compounds based on dioxin-induced developmental and reproductive effects in rats and monkeys...

Ngày tải lên: 15/03/2014, 23:22