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Book ; Online ; E-Book: Systems approach to astrobiology

Kolb, Vera M. / Clark, B. C.

(Series in astrophysics)

2023

Author's details	Vera M. Kolb and Benton C. Clark
Series title	Series in astrophysics
Keywords	Exobiology/Methodology
Subject code	576.839
Language	English
Size	1 online resource (169 pages)
Publisher	CRC Press
Publishing place	Abingdon, England
Document type	Book ; Online ; E-Book
Remark	Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
ISBN	1-00-322587-X ; 1-003-22587-X ; 1-000-86882-6 ; 1-03-212714-7 ; 978-1-00-322587-4 ; 978-1-003-22587-4 ; 978-1-000-86882-1 ; 978-1-03-212714-9
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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Article ; Online: An international review of patient safety measures in radiotherapy practice: Shafiq J, Barton M, Noble D, Lemer C, Donaldson LJ. Radiother Oncol. 2009 Jul;92(1):15-21.

Clark, Brenda G / Grimard, Lával

Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology

2009 Volume 93, Issue 3, Page(s) 657

MeSH term(s)	Humans ; Medical Errors ; Neoplasms/radiotherapy
Language	English
Publishing date	2009-12
Publishing country	Ireland
Document type	Comment ; Letter
ZDB-ID	605646-5
ISSN	1879-0887 ; 0167-8140
ISSN (online)	1879-0887
ISSN	0167-8140
DOI	10.1016/j.radonc.2009.08.025
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Article: C-M medium; a mounting medium for small insects, mites, and other whole mounts.

CLARK, E W / MORISHITA, F

Science (New York, N.Y.)

2003 Volume 112, Issue 2922, Page(s) 789–790

MeSH term(s)	Allergens ; Animals ; Humans ; Insecta ; Mites
Chemical Substances	Allergens
Language	English
Publishing date	2003-05-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	128410-1
ISSN	1095-9203 ; 0036-8075
ISSN (online)	1095-9203
ISSN	0036-8075
DOI	10.1126/science.112.2922.789
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Book: Paul C. Bucy, M.D

Clark, W. Kemp

(Leaders in neuroscience ; 4)

1988

Abstract: Producer) Dr. Bucy describes the first meeting of the organization that became the Harvey Cushing Society, discusses how manpower was viewed in those days and now, the establishment of the American Board of Neurological Surgery, anticipation that ... ...

Institution	Harvey Cushing Society. American Association of Neurological Surgeons
Author's details	American Association of Neurological Surgeons
Series title	Leaders in neuroscience ; 4
Abstract	(Producer) Dr. Bucy describes the first meeting of the organization that became the Harvey Cushing Society, discusses how manpower was viewed in those days and now, the establishment of the American Board of Neurological Surgery, anticipation that future advances in neurosurgery will be as great or greater than what has already happened.
MeSH term(s)	Physicians ; History, 20th Century ; Neurosurgery/history ; Societies, Medical/history
Keywords	United States
Language	English
Size	1 videocassette (60 min.) :, sd., col. ;, 1/2 in.
Publisher	The Association
Publishing place	Park Ridge, Ill.
Document type	Book
Database	Catalogue of the US National Library of Medicine (NLM)

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Article: Perfluoroterephthalate bridged complexes with M-M quadruple bonds: ((t)BuCO(2))(3)M(2)(mu-O(2)CC(6)F(4)CO(2))M(2)(O(2)C(t)Bu)(3), where M = Mo or W. Studies of solid-state, molecular, and electronic structure and correlations with electronic and Raman spectral data.

Bursten, Bruce E / Chisholm, Malcolm H / Clark, Robin J H / Firth, Steven / Hadad, Christopher M / Wilson, Paul J / Woodward, Patrick M / Zaleski, Jeffrey M

Journal of the American Chemical Society

2002 Volume 124, Issue 41, Page(s) 12244–12254

Abstract: The compounds [((t)BuCO(2))(3)M(2)(mu-O(2)CC(6)F(4)CO(2))M(2)(O(2)C(t)Bu)(3)], M(4)PFT, where M ... of the plane of the C(6)F(4) ring to become orthogonal to the M(4) plane, this energy gap is nearly doubled ... structure involving M.O intermolecular interactions in the solid state. The dihedral angle between the M(2 ...

Abstract	The compounds [((t)BuCO(2))(3)M(2)(mu-O(2)CC(6)F(4)CO(2))M(2)(O(2)C(t)Bu)(3)], M(4)PFT, where M = Mo or W, are shown by model fitting of the powder X-ray diffraction data to have an infinite "twisted" structure involving M.O intermolecular interactions in the solid state. The dihedral angle between the M(2) units of each molecule is 54 degrees. Electronic structure calculations employing density functional theory (Gaussian 98 and ADF2000.01, gradient corrected and time dependent) on the model compounds (HCO(2))(3)M(2)(mu-O(2)CC(6)F(4)CO(2))M(2)(O(2)CH)(3), where M = Mo or W, reveal that in the gas phase the model compounds adopt planar D(2)(h) ground-state structures wherein M(2) delta to bridge pi back-bonding is maximized. The calculations predict relatively small HOMO-LUMO gaps of 1.53 eV for M = Mo and 1.22 eV for M = W for this planar structure and that, when the "conjugation" is removed by rotation of the plane of the C(6)F(4) ring to become orthogonal to the M(4) plane, this energy gap is nearly doubled to 2.57 eV for M = Mo and 2.18 eV for M = W. The Raman and resonance Raman spectra of solid M(4)PFT and of Mo(4)PFT in THF solution are dominated by bands assigned to the bridging perfluoroterephthalate (pft) group. The intensities of certain Raman bands of solid W(4)PFT are strongly enhanced on changing the excitation line from 476.5 nm (off resonance) to 676.5 nm, which is on resonance with the W(2) delta --> CO(2) (pft) pi transition at ca. 650 nm. The resonance enhanced bands are delta(s)(CO(2)) (pft) at 518 cm(-)(1) and its first overtone at 1035 cm(-)(1), consistent with the structural change to W(4)PFT expected on excitation from the ground to this pi excited state. The electronic transitions for solid Mo(4)PFT (lowest at 410 nm) were not accessible with the available excitation lines (457.9-676.5 nm), and no resonance Raman spectra of this compound could be obtained. For Mo(4)PFT in THF solution, it is the band at 399 cm(-)(1) assigned to nu(MoMo) which is the most enhanced on approach to resonance with the electronic band at 470 nm; combination bands involving the C(6)F(4) ring-stretching mode, 8a, are also enhanced.
Language	English
Publishing date	2002-10-16
Publishing country	United States
Document type	Journal Article
ZDB-ID	3155-0
ISSN	1520-5126 ; 0002-7863
ISSN (online)	1520-5126
ISSN	0002-7863
DOI	10.1021/ja020248j
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Article: The stereoselectivity and catalytic properties of Xanthobacter autotrophicus 2-[(R)-2-Hydroxypropylthio]ethanesulfonate dehydrogenase are controlled by interactions between C-terminal arginine residues and the sulfonate of coenzyme M.

Clark, Daniel D / Boyd, Jeffrey M / Ensign, Scott A

Biochemistry

2004 Volume 43, Issue 21, Page(s) 6763–6771

Abstract: ... a substrate for R-HPCDH with a K(m) identical to that for R-HPC but with a k(cat) 600 times lower. Achiral 2 ... as the carbon chain length increased, K(m) decreased, with the K(m) for (R)-2-octanol being 1700 times lower ... substrates for R-HPCDH. The K(m) for (S)-2-butanol was identical to that for (R)-2-butanol, while the K(m ...

Abstract	2-[(R)-2-Hydroxypropylthio]ethanesulfonate (R-HPC) dehydrogenase (DH) catalyzes the reversible oxidation of R-HPC to 2-(2-ketopropylthio)ethanesulfonate (2-KPC) in a key reaction in the bacterial conversion of chiral epoxides to beta-keto acids. R-HPCDH is highly specific for the R-enantiomer of HPC, while a separate enzyme, S-HPCDH, catalyzes the oxidation of the corresponding S-enantiomer. In the present study, the features of substrate and enzyme imparting stereospecificity have been investigated for R-HPCDH. S-HPC was a substrate for R-HPCDH with a K(m) identical to that for R-HPC but with a k(cat) 600 times lower. Achiral 2-propanol and short-chain (R)- and (S)-2-alkanols were substrates for R-HPCDH. For (R)-alkanols, as the carbon chain length increased, K(m) decreased, with the K(m) for (R)-2-octanol being 1700 times lower than for 2-propanol. At the same time, k(cat) changed very little and was at least 90% lower than k(cat) for R-HPC and at least 22 times higher than k(cat) for S-HPC. (S)-2-Butanol and (S)-2-pentanol were substrates for R-HPCDH. The K(m) for (S)-2-butanol was identical to that for (R)-2-butanol, while the K(m) for (S)-2-pentanol was 7.5 times higher than for (R)-2-pentanol. Longer chain (S)-2-alkanols were sufficiently poor substrates for R-HPCDH that kinetic parameters could not be determined. Mutagenesis of C-terminal arginine residues of R-HPCDH revealed that R152 and R196 are essential for effective catalysis with the natural substrates R-HPC and 2-KPC but not for catalysis with 2-alkanols or ketones as substrates. Short-chain alkylsulfonates and coenzyme M (2-mercaptoethanesulfonate) were found to modify the kinetic parameters for 2-butanone reduction by R-HPCDH in a saturable fashion, with the general effect of increasing k(cat), decreasing K(m), and increasing the enantioselectivity of 2-butanone reduction to a theoretical value of 100% (S)-2-butanol. The modulating effects of ethanesulfonate and propanesulfonate provided thermodynamic binding constants close to K(m) for the natural substrates R-HPC and 2-KPC. The effects of alkylsulfonates on modulating the enantioselectivity and kinetic properties of R-HPCDH were abolished in R152A and R196A mutants but not in mutants of other C-terminal arginine residues. Collectively, the results suggest that interactions between the sulfonate of CoM and specific arginine residues are key to the enantioselectivity and catalytic efficiency of R-HPCDH. A model is proposed wherein sulfonate-arginine interactions within an alkylsulfonate binding pocket control the catalytic properties of R-HPCDH.
MeSH term(s)	Alcohol Oxidoreductases/chemistry ; Alcohol Oxidoreductases/genetics ; Alcohol Oxidoreductases/metabolism ; Alcohols/chemistry ; Alcohols/metabolism ; Alkanesulfonates/chemistry ; Alkanesulfonates/metabolism ; Arginine/metabolism ; Binding Sites ; Butanones/metabolism ; Catalysis ; Catalytic Domain ; Kinetics ; Mesna/chemistry ; Mesna/metabolism ; Mutagenesis, Site-Directed ; Oxidation-Reduction ; Stereoisomerism ; Substrate Specificity ; Xanthobacter/enzymology
Chemical Substances	Alcohols ; Alkanesulfonates ; Butanones ; ethane sulfonate (599310E3U2) ; methylethyl ketone (6PT9KLV9IO) ; Arginine (94ZLA3W45F) ; Alcohol Oxidoreductases (EC 1.1.-) ; 2-hydroxypropylthioethanesulfonate dehydrogenase, Xanthobacter (EC 1.1.1.-) ; Mesna (NR7O1405Q9)
Language	English
Publishing date	2004-06-01
Publishing country	United States
Document type	Journal Article ; Research Support, U.S. Gov't, P.H.S.
ZDB-ID	1108-3
ISSN	1520-4995 ; 0006-2960
ISSN (online)	1520-4995
ISSN	0006-2960
DOI	10.1021/bi049783h
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Article ; Online: Letter regarding: Allen, B. M., Hack, C. E., & Clewell, H. J. (2007). Use of Markov Chain Monte Carlo analysis with a physiologically based pharmacokinetic model of methylmercury to estimate exposure in U.S. women of childbearing age. Risk Analysis, 27(1), 947-959.

Carrington, Clark D / Bolger, Michael

Risk analysis : an official publication of the Society for Risk Analysis

2008 Volume 28, Issue 5, Page(s) 1137–1140

MeSH term(s)	Adult ; Environmental Exposure ; Female ; Humans ; Markov Chains ; Maternal Age ; Maternal Exposure ; Methylmercury Compounds/administration & dosage ; Methylmercury Compounds/pharmacokinetics ; Models, Biological ; Monte Carlo Method ; Pregnancy ; Risk Assessment ; United States ; Young Adult
Chemical Substances	Methylmercury Compounds ; methylmercuric chloride (RWZ4L3O1X0)
Language	English
Publishing date	2008-10
Publishing country	United States
Document type	Comment ; Letter
ZDB-ID	778660-8
ISSN	1539-6924 ; 0272-4332
ISSN (online)	1539-6924
ISSN	0272-4332
DOI	10.1111/j.1539-6924.2008.01056.x
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Article: N.m.r. studies of the cytoplasmic C-terminal beta-subunit domain of the high-affinity IgE receptor.

Zloh, M / Anderson, G / Clark-Lewis, I / Thomas, R / Benedetti, E / Toth, I / Gibbons, W A

Biochemical Society transactions

1994 Volume 22, Issue 4, Page(s) 1027–1029

MeSH term(s)	Amino Acid Sequence ; Macromolecular Substances ; Magnetic Resonance Spectroscopy/methods ; Molecular Sequence Data ; Peptide Fragments/chemical synthesis ; Peptide Fragments/chemistry ; Protein Structure, Secondary ; Receptors, IgE/chemistry ; Spectroscopy, Fourier Transform Infrared
Chemical Substances	Macromolecular Substances ; Peptide Fragments ; Receptors, IgE
Language	English
Publishing date	1994-11
Publishing country	England
Document type	Journal Article
ZDB-ID	184237-7
ISSN	1470-8752 ; 0300-5127
ISSN (online)	1470-8752
ISSN	0300-5127
DOI	10.1042/bst0221027
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Article: Oxalate-bridged complexes of dimolybdenum and ditungsten supported by pivalate ligands: ((t)BuCO(2))(3)M(2)(mu-O(2)CCO(2))M(2)(O(2)C(t)Bu)(3). Correlation of the solid-state, molecular, and electronic structures with Raman, resonance Raman, and electronic spectral data.

Bursten, Bruce E / Chisholm, Malcolm H / Clark, Robin J H / Firth, Steven / Hadad, Christopher M / MacIntosh, Ann M / Wilson, Paul J / Woodward, Patrick M / Zaleski, Jeffrey M

Journal of the American Chemical Society

2002 Volume 124, Issue 12, Page(s) 3050–3063

Abstract: The compounds ((t)BuCO(2))(3)M(2)(mu-O(2)CCO(2))M(2)(O(2)C(t)Bu)(3) (M(4)OXA), where M = Mo or W ... oxygen atoms from the oxalate and pivalate ligands of one M(4)OXA molecule are linked to metal atoms ... emission spectra are reported, together with corresponding spectra of the mu-O(2)(13)C(13)CO(2) isotopomers. To aid ...

Abstract	The compounds ((t)BuCO(2))(3)M(2)(mu-O(2)CCO(2))M(2)(O(2)C(t)Bu)(3) (M(4)OXA), where M = Mo or W, are shown by analysis of powder X-ray diffraction data to have extended lattice structures wherein oxygen atoms from the oxalate and pivalate ligands of one M(4)OXA molecule are linked to metal atoms of neighboring molecules. Raman, resonance Raman, electronic absorption (2-325 K in 2-MeTHF), and emission spectra are reported, together with corresponding spectra of the mu-O(2)(13)C(13)CO(2) isotopomers. To aid in the assignment, the Raman spectra of K(2)C(2)O(4).H(2)O and K(2)(13)C(2)O(4).H(2)O have also been recorded. The visible region of the electronic spectra is dominated by intense, fully allowed MLCT transitions, M(2) delta to oxalate pi, which show pronounced thermochromism and extensive vibronic progressions associated with the oxalate ligand at low temperatures. With excitation into these charge-transfer bands, strong resonance enhancement is seen for Raman bands assigned to the oxalate nu(1)(a(g)) and, to a lesser extent, nu(2)(a(g)) modes. Electronic structure calculations for the model compounds (HCO(2))(3)M(2)(mu-O(2)CCO(2))M(2)(O(2)CH)(3), employing density functional theory (gradient corrected and time-dependent) with the Gaussian 98 and ADF 2000 packages, predict the planar oxalate D(2h) configuration to be favored, which maximizes M(2) delta to oxalate pi back-bonding, and indicate low barriers (<8 kcal mol(-1)) to rotation about the oxalate C-C bonds.
Language	English
Publishing date	2002-03-27
Publishing country	United States
Document type	Journal Article
ZDB-ID	3155-0
ISSN	1520-5126 ; 0002-7863
ISSN (online)	1520-5126
ISSN	0002-7863
DOI	10.1021/ja011786j
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Article: Walter James Latham, M.R.C.S. (Eng.), L.R.C.P. (Lond.), D.M.R.D. R.C.P. (Lond), R.C.S. (Eng), F.F.R.

Dickie-Clark, W F

South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde

1971 Volume 45, Issue 40, Page(s) 1124–1125

MeSH term(s)	History of Medicine ; Naval Medicine ; Radiology ; South Africa
Language	English
Publishing date	1971-10-16
Publishing country	South Africa
Document type	Biography ; Historical Article ; Journal Article
ZDB-ID	390968-2
ISSN	2078-5135 ; 0256-9574 ; 0038-2469
ISSN (online)	2078-5135
ISSN	0256-9574 ; 0038-2469
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