Stereoisomers, tautomers and protomers must be enumerated using, for instance, OpenEye tools, and Morgan fingerprints must be calculated (Fig. 3). Other similar database preparation tools can be used for the same purpose. The procedure described here calculates all the possible stereoisomers of a given molecule and the dominant tautomer form (protonated at pH 7.4) for each isomer. These commands can be changed, for example, to enumerate multiple tautomers and protomers (see for guidance); each of these must be assigned a unique name, however, resulting in a substantial increase in the number of unique library entries. For some chemical libraries, the tautomers and protomers are partially or completely enumerated, and therefore these steps may not be required.
Initially, the library is obtained in SMILES format and split into evenly populated files to facilitate sampling and inference. Depending on the available resources, the user can then follow two preparation procedures. Procedure 1 (manual preparation) requires each preparation action to be executed manually (enumeration of stereoisomers, tautomers and protomers; renaming the files; and calculation of Morgan fingerprints). Procedure 2 (automated) allows running all the preparation automatically; however, it requires access to a computing cluster running with a job scheduler (Slurm). Both processes will generate a folder with the prepared SMILES and another one with the corresponding Morgan fingerprints in DD format.
Windows Xc 2011 V2 3 Isomers
As in Procedure 1, stereoisomers, tautomers and protomers must be enumerated using for instance OpenEye tools, and Morgan fingerprints must be calculated (Fig. 3). Other similar database preparation tools can be used for the same purpose. The procedure described here calculates all the possible stereoisomers of a given molecule and the dominant tautomer form (protonated at pH 7.4) for each isomer. These commands can be changed, for example, to enumerate multiple tautomers and protomers (see for guidance); each of these must be assigned a unique name, however, resulting in a substantial increase in the number of unique library entries. For some chemical libraries, the tautomers and protomers are partially or completely enumerated, and therefore these steps may not be required.
S. mansoni egg antigens, but not ω-1, interact with Dectin-1 and Dectin-2 expressed by DCs to promote 2 intracellular pathways in moDCs in an Syk-dependent manner: ERK-cPLA2-COX and ROS activity that culminate in PGE2 and PGE2 isomer synthesis, respectively. Both PGE2 and its isomers can then bind to EP2 and EP4 in an autocrine loop to trigger OX40L expression, which endows the DCs with the capacity to prime a Th2 response. ω-1, omega-1; COX, cyclooxygenase; cPLA2, cytosolic phospholipase A2; DC, dendritic cell; EP2, prostaglandin E2 receptor 2; ERK, extracellular signal-regulated kinase; moDC, monocyte-derived DC; OX40L, OX40 ligand; PGE2, prostaglandin E2; ROS, reactive oxygen species; Syk, spleen tyrosine kinase; Th2, T helper 2.
In 2010, 2K Marin announced they were working on re-imagining of X-COM, relabeled as XCOM.[31] It was described as a tactical and strategic first-person shooter that would combine elements from the original X-COM alongside a new setting and viewpoint while keeping some main concepts from the original game series. The setting received a complete overhaul, now based in the early 1960s, with the original XCOM organization being a secret U.S. federal agency. Originally planned for 2011, the game was repeatedly redesigned by different studios before being finally released in 2013 as The Bureau: XCOM Declassified for Windows, OS X, PlayStation 3 and Xbox 360.
Fan-remake projects for UFO: Enemy Unknown have included X-com - Last Hope (a mod of Half-Life 2 released in 2006),[67] UFO: The Two Sides (development halted in 2011 due to copyright issues),[68] UFO: Cydonia's Fall (canceled in 2012),[69] X-COM: Origin (canceled in 2013),[70] and The Rebel Squad (an also defunct project by Sam Liu).[71]
Lutein and zeaxanthin are two ofthe most abundant carotenoids present in the diet - they are the pigments responsible for the bright yellow, red, and orange colors of many fruits and vegetables. Lutein and zeaxanthin are isomers that differ by the location of a single double bond [4]. Supplementation with lutein/zeaxanthin has been shown to increase circulating and tissue levels of these xanthophylls and are potent anti-oxidants which also act as filters of high-energy blue light. Thus, these xanthophylls are reported to be protective against photo-induced oxidative damage, particularly in highly exposed tissues such as the skin and eyes. The visible light spectrum is composed of wavelengths of light from about 390nm to 700nm with short, high energy wavelengths at the lower end and long, low energy at the upper end of the range. Violet - blue light (high-energy blue light) ranges from around 400 - 500nm and is known to be damaging. Blue light is capable of inducing photo- oxidative damage through generation of ROS and it requires 100 times less energy to cause damage to tissues compared to orange light (590nm) [5].
The ability of carotenoids, such as lutein, zeaxanthin isomers, P-carotene, and lycopene, to function as blue light filters has been evaluated using a unilamellar liposome model, in vitro [6]. Lutein, zeaxanthin, and meso-zeaxanthin (macular carotenoids) are known to deposit in the macula (yellow spot) of the retina and function to protect the retina at a spot where light is concentrated - the area of visual acuity - through their ability to act as a powerful antioxidant and oxygen singlet quencher. In rhesus monkeys deprived of dietary xanthophyll's during their lifetime, supplementation with either lutein or zeaxanthin at 2.2 mg/kg body weight/day for 22 to 28 weeks resulted in less damage in the fovea following blue light exposure compared to non-supplemented animals [7]. Moreover, the sensitivity to damage in these supplemented animals did not differ from those observed in control animals fed a standard diet throughout their lifetimes [7].
Subjects were randomly assigned to either placebo (n = 13) or MC supplement (L/Zi, n = 35) groups. Pills for each group were identical, brown-colored, soft gelatin capsules. PLA contained only safflower oil without L and Zi. Independent analysis indicated that the active supplement pills (Lutemax 2020) contained 20 mg of Lutein (L), and 4 mg Zeaxanthin isomers (Zi, zeaxanthin and meso- zeaxanthin), obtained from the extract of dried flowers of Marigold (Tagetes species) supplied by OmniActive Health Technologies Ltd, India. Subjects were instructed to ingest one pill with a meal (preferably lunch or dinner) daily. Compliance was ensured with weekly phone calls and pill counts.
Current Version: 1.5.10 (April 14, 2011)OverviewThe ChemRate program package enables one to calculate time-dependent and steady-state rate coefficients at different temperatures and pressures. Systems of high complexity involving reversible isomerization, decomposition and thermal and chemical activation can be considered. The density and sum of states are calculated using direct count or Whitten-Rabinovitch algorithms with vibration frequencies and moments of inertia as input parameters. Alternatively, analytical expression with three parameters can be used for k(E). The microscopic rate coefficients k(E) are calculated by using RRKM theory. The collision energy transfer probabilities are taken in the standard form of an "exponential down" model. The time evolution of the population of each the species in the system is described by the master equation.Development HistoryThe basis for ChemRate was developed about 20 years ago in 1995-1996. A description of the some of the methodology can be found inBedanov, V. M.; Tsang, W.; Zachariah, M. R.; "Master equation analysis of thermal activation reactions - reversible isomerization and decomposition." J. Phys. Chem. 99, 11452-11457 (1995).Tsang, W; Bedanov, V; Zachariah, MR; "Master equation analysis of thermal activation reactions: Energy-transfer constraints on falloff behavior in the decomposition of reactive intermediates with low thresholds." J. Phys. Chem. 100, 4011-4018 (1996).Knyazev, VD; Tsang, W; "Chemically and thermally activated decomposition of secondary butyl radical." J. Phys. Chem. A 104, 10747-10765 (2000).Flow Sheet for The Calculation of Unimolecular ReactionsDatabases of Transition Statesand Molecular Properties Databases for Experimental ResultsCalculator for Density andSum of States Specific Rates Calculator for High PressureRate Constants Thermal Functions Master Equation SolverDistribution FunctionsRate Constants for All ConditionsCurve Fitting RoutinesAppropriate Forms for SimulationFeaturesCalculates high pressure rate constants of all unimolecular reactionson the basis of transition state theory.
Determines specific rate constants on the basis of RRKM theory.
Treats multichannel reactions including chemical activation processes under equilibriumand non-equilibrium conditions. Calculates steady state rate constant as well astime-dependent rate constants.
Carry out calculations with any initial distribution.
Compute thermofunctions (Cp, ΔS, ΔH, pK, etc.) at any temperature.
Simple treatment of bimolecular reactions.
Calculates thermodynamic properties and rate constants from Gaussian file.
Treats hindered rotors.
Treats tunneling.
Multicomponent buffer gas.
Fit computed results in various ways.
Compare computed results with experimental data.
Easy to build time-dependent distribution functions, rate constants, and concentration.
DatabasesCreates and accesses the database of components and reactions. The database includes:standard heat of formation, frequencies, external and internal rotations, collisionparameters, geometry, experimental data. Possibility to define collisional parametersbetween any pair of collision participants.
Technical Application contains follow tools:Content-sensitive help.
3D molecule geometry viewer.
Import data from GAUSSIAN output file.
Find internal rotors and compute moments of inertia.
Compute Lenard-Jones parameters from critical T and P.
Graphical presentation of data including 3D view.
Data exchange between other Windows applications (Word, Excel, Access, etc.) bycopy & paste.
Requirements Pentium II 400 processor or greater
Windows 95/98/NT/2000/XPWindows 7/Windows 10
128 Mb RAM
100 Mb hard drive space
Sample ImagesWorkspace Database Usage by ResearchersThe ChemRate program has been used by a variety of researchers over the last 15-20 years.1995Bedanov, V. M.; Tsang, W.; Zachariah, M. R.; "Master equation analysis of thermal activation reactions - reversible isomerization and decomposition." J. Phys. Chem. 99, 11452-11457 (1995).1996Tsang, W; Bedanov, V; Zachariah, MR; "Master equation analysis of thermal activation reactions: Energy-transfer constraints on falloff behavior in the decomposition of reactive intermediates with low thresholds." J. Phys. Chem. 100, 4011-4018 (1996).2000Knyazev, VD; Tsang, W; "Chemically and thermally activated decomposition of secondary butyl radical." J. Phys. Chem. A 104, 10747-10765 (2000).2002Lee, JW; Chen, CJ; Bozzelli, JW; "Thermochemical and kinetic analysis of the acetyl radical (CH3C center dot O)+O-2 reaction system." J. Phys. Chem. A 106, 7155-7170 (2002).2002Lindstedt, RP; Rizos, KA; "The formation and oxidation of aromatics in cyclopentene and methyl-cyclopentadiene mixtures." Proc. Combust. Inst. 29, Published: 2002 (2002).2003Bryukov, MG; Kostina, SA; Knyazev, VD; "Kinetics of the unimolecular decomposition of the C2Cl3 radical." J. Phys. Chem. A 107, 6574-6579 (2003).2003Lee, J; Bozzelli, JW; "Reaction of H plus ketene to formyl methyl and acetyl radicals and reverse dissociations." Int. J. Chem. Kinet. 35, 20-44 (2003).2003Tokmakov, IV; Moskaleva, LV; Paschenko, DV; et al.; "Computational study of the HCCO+NO reaction: ab initio MO/vRRKM calculations of the total rate constant and product branching ratios." J. Phys. Chem. A 107, 1066-1076 (2003).2004Li, J; Kazakov, A; Dryer, FL; "Experimental and numerical studies of ethanol decomposition reactions." J. Phys. Chem. A 108, 7671-7680 (2004).2005Ismail, H; Park, J; Wong, BM; et al.; "A theoretical and experimental kinetic study of phenyl radical addition to butadiene." Proc. Combust. Inst. 30, 1049-1056 (2005).2005Lee, J; Bozzelli, JW; "Thermochemical and kinetic analysis of the allyl radical with O-2 reaction system." Proc. Combust. Inst. 30, 1015-1022 (2005).2005Xu, S; Irle, S; Musaev, AG; et al.; "Water clusters on graphite: Methodology for quantum chemical A priori prediction of reaction rate constants." J. Phys. Chem. A 109, 9563-9572 (2005).2006McGivern, W. Sean; Manion, Jeffrey A.; Tsang, Wing; "Ring-expansion reactions in the thermal decomposition of tert-butyl-1,3-cyclopentadiene." J. Phys. Chem. A 110, 12822-12831 (2006).2006Xu, ZF; Lin, MC; "Ab initio kinetics for the unimolecular reaction C6H5OH -> CO+C5H6." J. Phys. Chem. A 110, 1672-1677 (2006).2007Xu, Z. F.; Lin, M. C.; "Computational studies on the kinetics and mechanisms for NH3 reactions with ClOx (x=0-4) radicals." J. Phys. Chem. A 111, 584-590 (2007).2008McGivern, W. Sean; Awan, Iftikhar A.; Tsang, Wing; et al.; "Isomerization and decomposition reactions in the pyrolysis of branched hydrocarbons: 4-methyl-1-pentyl radical." J. Phys. Chem. A 112, 6908-6917 (2008).2009da Silva, Gabriel; Bozzelli, Joseph W.; "Benzoxyl Radical Decomposition Kinetics: Formation of Benzaldehyde plus H, Phenyl + CH2O, and Benzene plus HCO." J. Phys. Chem. A 113, 6979-6986 (2009).2009Huang, Wen-Fei; Chen, Hsin-Tsung; Lin, M. C.; "Density Functional Theory Study of the Adsorption and Reaction of H2S on TiO2 Rutile (110) and Anatase (101) Surfaces." J. Phys. Chem. C 113, 20411-20420 (2009).2009Tsang, Wing; McGivern, W. Sean; Manion, Jeffrey A.; "Multichannel decomposition and isomerization of octyl radicals." Proc. Combust. Inst. 32, 131-138 (2009).2010Awan, Iftikhar A.; McGivern, W. Sean; Tsang, Wing; et al.; "Decomposition and Isomerization of 5-Methylhex-1-yl Radical." J. Phys. Chem. A 114, 7832-7846 (2010).2010Davis, Alexander C.; Francisco, Joseph S.; "Ab Initio Study of Hydrogen Migration in 1-Alkylperoxy Radicals." J. Phys. Chem. A 114, 11492-11505 (2010).2011Guan, Yulei; Yang, Bolun; Oi, Suitao; et al.; "Kinetic Modeling of the Free-Radical Process during the Initiated Thermal Cracking of Normal Alkanes with 1-Nitropropane as an Initiator." Ind. Eng. Chem. Res. 50, 9054-9062 (2011).2011Nisar, Jan; Awan, Iftikhar A.; "Kinetics of the gas-phase thermal decomposition of 3-bromopropene." Kinet. Catal. 52, 487-492 (2011).2011Tian, Zhenyu; Yuan, Tao; Fournet, Rene; et al.; "An experimental and kinetic investigation of premixed furan/oxygen/argon flames." Combust. Flame 158, 756-773 (2011).2012Awan, Iftikhar A.; Burgess, Donald R., Jr.; Manion, Jeffrey A.; "Pressure Dependence and Branching Ratios in the Decomposition of 1-Pentyl Radicals: Shock Tube Experiments and Master Equation Modeling." J. Phys. Chem. A 116, 2895-2910 (2012).2012Awan, Iftikhar A.; Burgess, Donald R., Jr.; Tsang, Wing; et al.; "Standard reactions for comparative rate studies: Experiments on the dehydrochlorination reactions of 2-chloropropane, chlorocyclopentane, and chlorocyclohexane." Int. J. Chem. Kinet. 44, 351-368 (2012).2012Cord, Maximilien; Sirjean, Baptiste; Fournet, Rene; et al.; "Improvement of the Modeling of the Low-Temperature Oxidation of n-Butane: Study of the Primary Reactions." J. Phys. Chem. A 116, 6142-6158 (2012).2012Kislov, V. V.; Mebel, A. M.; Aguilera-Iparraguirre, J.; et al.; "Reaction of Phenyl Radical with Propylene as a Possible Source of Indene and Other Polycyclic Aromatic Hydrocarbons: An Ab Initio/RRKM-ME Study." J. Phys. Chem. A 116, 4176-4191 (2012).2012Sirjean, Baptiste; Dames, Enoch; Wang, Hai; et al.; "Tunneling in Hydrogen-Transfer Isomerization of n-Alkyl Radicals." J. Phys. Chem. A 116, 319-332 (2012).2012Weng, Meng Hsiung; Chen, Hsin-Tsung; Wang, Yao-Chun; et al.; "Kinetics and Mechanisms for the Adsorption, Dissociation, and Diffusion of Hydrogen in Ni and Ni/YSZ Slabs: A DFT Study." Langmuir 28, 5596-5605 (2012).2013Altarawneh, Ibrahem; Altarawneh, Mohammednoor; Rawadieh, Saleh; "Theoretical study on thermochemical parameters and IR spectra of chlorinated isomers of nitrobenzene." Can. J. Chem. 91, 999-1008 (2013).2013Davis, Alexander C.; Sarathy, S. Mani; "Computational Study of the Combustion and Atmospheric Decomposition of 2-Methylfuran." J. Phys. Chem. A 117, 7670-7685 (2013).2013Manion, Jeffrey A.; Awan, Iftikhar A.; "The decomposition of 2-pentyl and 3-pentyl radicals." Proc. Combust. Inst. 34, 537-545 (2013).2014Ahubelem, Nwakamma; Altarawneh, Mohammednoor; Dlugogorski, Bogdan Z.; "Dehydrohalogenation of ethyl halides." Tetrahedron Lett. 55, 4860-4868 (2014).2014Wang, Zhandong; Ye, Lili; Yuan, Wenhao; et al.; "Experimental and kinetic modeling study on methylcyclohexane pyrolysis and combustion." Combust. Flame 161, 84-100 (2014).2015Al Rashidi, Mariam J.; Davis, Alexander C.; Sarathy, S. Mani; "Kinetics of the high-temperature combustion reactions of dibutylether using composite computational methods." Proc. Combust. Inst. 35, 385-392 (2015).2015Khaled, Fethi; Giri, Binod Raj; Szori, Milan; et al.; "An experimental and theoretical study on the kinetic isotope effect of C2H6 and C2D6 reaction with OH." Chem. Phys. Lett. 641, 158-162 (2015).2015Ning, HongBo; Gong, ChunMing; Li, ZeRong; et al.; "Pressure-Dependent Kinetics of Initial Reactions in Iso-octane Pyrolysis." J. Phys. Chem. A 119, 4093-4107 (2015).2015Trong-Nghia Nguyen; Putikam, Raghunath; Lin, M. C.; "A novel and facile decay path of Criegee intermediates by intramolecular insertion reactions via roaming transition states." J. Chem. Phys. 142, 124312 (2015).2016Yang, Feiyu; Deng, Fuquan; Pan, Youshun; et al.; "Ab initio kinetics for isomerization reaction of normal-chain hexadiene isomers." Chem. Phys. Lett. 663, 66-73 (2016).NotesThe Microsoft Visual C++ 2008 Redistributable may be required (if you get an error and the application refuses to start).
2ff7e9595c
Comments