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Stefan Karrasch, Myriam Simon, Britta Herbig, Jeanette Langner, Stefan Seeger, Angelika Kronseder, Stefan Peters, Gisela Dietrich-Gümperlein, Rudolf Schierl, Dennis Nowak, Rudolf A Jörres
Ultrafine particles emitted from laser printers are suspected to elicit adverse health effects. We performed 75-minute exposures to emissions of laser printing devices (LPDs) in a standardized, randomized, cross-over manner in 23 healthy subjects, 14 mild, stable asthmatics and 15 persons reporting symptoms associated with LPD emissions. Low level exposures (LLE) ranged at the particle background (3,000 cm(-3) ), high level exposures (HLE) at 100,000 cm(-3) . Examinations before and after exposures included spirometry, body plethysmography, transfer factors for CO and NO (TLCO, TLNO), bronchial and alveolar NO, cytokines in serum and nasal secretions (IL-1β, IL-5, IL-6, IL-8, GM-CSF, IFNγ, TNFα), serum ECP, and IgE...
January 5, 2017: Indoor Air
Rim Dridi, Stephane Glenet, Zouhair Tabka, Mohamed Amri, Hervé Guénard
In both children and adults, acute exercise increases lung capillary blood volume (Vc) and membrane factor (DmCO). We sought to determine whether basketball training affected this adaptation to exercise in children. The purpose of this study was to determine the effects of two years sport activity on the components of pulmonary gas transfer in children. Over a 2-yr period, we retested 60 nine year old boys who were initially separated in two groups: 30 basketball players (P) (9.0 ± 1.0 yrs; 35.0 ± 5.2 kg; 1...
2006: Journal of Sports Science & Medicine
Zhong-Wei Gao, Xing Feng, Lan Mu, Xin-Long Ni, Li-Li Liang, Sai-Feng Xue, Zhu Tao, Xi Zeng, Bodgan E Chapman, Philip W Kuchel, Leonard F Lindoy, Gang Wei
Similar to the larger members of the cucurbituril family, such as cucurbit[8]uril (Q[8]), the smallest member, cucurbit[5]uril (Q[5]), can also induce room-temperature phosphorescence (RTP) of α-naphthol (1) and β-naphthol (2). The relationship between the RTP intensity of 1 and 2 and the concentration of Q[5] or Q[8] suggests that the mechanism underlying the Q[5] complex-induced RTP is different from that of the Q[8]-induced RTP for these luminophores. The crystal structures of 1-Q[5]-KI, 2-Q[5]-KI, 1-Q[5]-TlNO(3), and 2-Q[5]-TlNO(3) systems show that in each case Q[5] and the respective metal ions, K(+) or Tl(+), form infinite ···Q[5]-M(+)-Q[5]-M(+)··· chains that surround the luminophores...
February 21, 2013: Dalton Transactions: An International Journal of Inorganic Chemistry
Cabrini F de Souza, Renata K S Martins, Andrea R da Silva, Alessandra L M C da Cunha, Ricardo Q Aucélio
A phosphorimetric method was developed to enable the determination of enrofloxacin using photochemical derivatization which was used to both improve detection limits and to minimize the uncertainty of measurements. Phosphorescence was induced on cellulose containing TlNO(3). Absolute limit of detection at the ng range and linear analytical response over three orders of magnitude were achieved. A metrological study was made to obtain the combined uncertainty value and to identify that the precision was mainly affected by the changing of substrates when measuring the signal from each replicate...
January 1, 2013: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Sergey M Korotkov
It is known that permeability of the inner mitochondrial membrane is low to most univalent cations (K(+), Na(+), H(+)) but high to Tl(+). Swelling, state 4, state 3, and 2,4-dinitrophenol (DNP)-stimulated respiration as well as the membrane potential (DeltaPsi(mito)) of rat liver mitochondria were studied in media containing 0-75 mM TlNO(3) either with 250 mM sucrose or with 125 mM nitrate salts of other monovalent cations (KNO(3), or NaNO(3), or NH(4)NO(3)). Tl(+) increased permeability of the inner mitochondrial membrane to K(+), Na(+), and H(+), that was manifested as stimulation of the swelling of nonenergized and energized mitochondria as well as via an increase of state 4 and dissipation of DeltaPsi(mito)...
June 2009: Journal of Bioenergetics and Biomembranes
Bruno Degano, Marie Mittaine, Hervé Guénard, Jacques Rami, Gilles Garcia, Nassim Kamar, Christophe Bureau, Jean-Marie Péron, Lionel Rostaing, Daniel Rivière
In advanced cirrhosis, decreased lung transfer for carbon monoxide (TLCO) and increased alveolar-arterial oxygen tension difference (PA-aO(2) >or=15 mmHg while breathing ambient air) are frequently detected. Pulmonary membrane diffusion capacity for CO (DmCO) and pulmonary capillary blood volume (Vcap) can be derived from the simultaneous measurement of TLCO and lung transfer for nitric oxide (TLNO). Measurements of single-breath TLNO and TLCO were performed in 49 cirrhotic patients with advanced liver cirrhosis and in 35 healthy controls to derive Vcap, DmCO, and TLNO:TLCO ratio...
July 2009: Journal of Applied Physiology
E D Hagestuen, A D Campiglia
For the first time, solid-phase extraction (SPE) has been combined to room-temperature phosphorimetry (RTP) to determine the 16 polycylic aromatic hydrocarbons related as major pollutants by the US Environmental Protection Agency (EPA). These include naphthalene, anthracene, acenaphthylene, acenaphthene, fluorene, fluoranthene, benzo(a)anthracene, benzo(k)fluoranthene, benzo(b)fluoranthene, benzo(a)pyrene, indeno(1,2,3-cd)pyrene, pyrene, chrysene, phenanthrene, benzo(g,h,i)perylene and dibenzo(a,h)anthracene...
July 1999: Talanta
L Li, Y Zhao, Y Wu, A Tong
In our previous work, we reported that with TlNO(3) as a heavy atom perturber and Na(2)SO(3) as a deoxygenator, room temperature phosphorescence (RTP) emission of dansyl chloride and its amino acid derivatives can be induced directly from their aqueous solution without a protective medium. Is this kind of fluid luminescence phenomenon unique for the dansyl chloride compounds? The present work has shown that many naphthalene derivatives can also exhibit RTP emission in their aqueous solutions under similar conditions in the absence of a protective medium...
August 1998: Talanta
Sergey M Korotkov, Vadim V Glazunov, Olga V Yagodina
The effects of Tl(+) ions on isolated rat liver mitochondria were studied in the presence of nonactin, a cyclic ionophore. Nonenergized rat liver mitochondria were increasingly swollen at an elevated concentration of Tl(+) in the 160 mOsm medium containing 0-150 mM sucrose and 0-75 mM TlNO(3) or 0-50 mM Tl acetate. On the contrary, mitochondria in experiments with nonactin were contracted in the medium with 5-25 mM Tl(+) and were swollen only in the medium with 50-75 mM TlNO(3) or 50 mM Tl acetate. State 4 respiration along with swelling of succinate-energized mitochondria followed contraction after their deenergization was further enhanced at increasing concentration of Tl acetate in a medium containing nonactin...
2007: Journal of Biochemical and Molecular Toxicology
S Rouatbi, K Dardouri, Y Farhat Ouahchi, S Ben Mdella, Z Tabka, H Guenard
INTRODUCTION: The study of lung parenchymal function is focused on the measurement of carbon monoxide diffusing transfer (TLCO) which is a function of both membrane characteristics (Dm) and capillary lung volume (Vc) The objective of this study was to estimate the effect of age on both variables. METHODS: At rest, 134 healthy non-smokers (18-85 year old) were investigated by a double transfer NO-CO method. Capillary pulmonary compliance was estimated by applying a continuous negative pressure (CNP: -10 mmHg) at the mouth to 24 subjects...
November 2006: Revue des Maladies Respiratoires
Jesús R Berenguer, Juan Forniés, Belén Gil, Elena Lalinde
A novel series of [PtTl(2)(C[triple chemical bond]CR)(4)](n) (n = 2, R = 4-CH(3)C(6)H(4) (Tol) 1, 1-naphthyl (Np) 2; n = infinity, R = 4-CF(3)C(6)H(4) (Tol(F)) 3) complexes has been synthesized by neutralization reactions between the previously reported [Pt(C[triple chemical bond]CR)(4)](2-) (R = Tol, Tol(F)) or novel (NBu(4))(2)[Pt(C[triple chemical bond]CNp)(4)] platinum precursors and Tl(I) (TlNO(3) or TlPF(6)). The crystal structures of [Pt(2)Tl(4)(C[triple chemical bond]CTol)(8)]4 acetone, 14 acetone, [Pt(2)Tl(4)(C[triple chemical bond]CNp)(8)]3 acetone1/3 H(2)O, 23 acetone 1/3 H(2)O and [[PtTl(2)(C[triple chemical bond]CTol(F))(4)](acetone)S](infinity) (S = acetone 3 a; dioxane 3 b) have been solved by X-ray diffraction studies...
January 11, 2006: Chemistry: a European Journal
Allison L Thompson, Robert J Hurtubise
The solid-matrix fluorescence (SMF) quenching of benzo[e]pyrene and (+/-)-anti-dibenzo[a, l]pyrene-11,12-diol-13,14-epoxide ((+/-)-antiDB[a, l]PDE)-DNA adducts with thallium nitrate (TlNO(3)) and sodium iodide (NaI) was examined and several SMF quenching models were developed. The SMF quenching data for B[e]P with either TlNO(3) or NaI fit a two-independent-binding-site model. However, the SMF quenching of (+/-)-anti-DB[a, l]PDE-DNA adducts with TlNO(3) fits a sphere of action model, but quenching with NaI was modeled with the two-independent-binding-site model...
January 2005: Applied Spectroscopy
Boris E. Bosch, Martin Eisenhawer, Berthold Kersting, Kristin Kirschbaum, Bernt Krebs, Dean M. Giolando
The syntheses, molecular structures and properties of homoleptic 1,2-S(2)C(6)H(4) complexes of thallium(I) and thallium(III) with four-coordinated metal centers are described. Anaerobic treatment of TlCl, TlNO(3), or Tl(2)CO(3) with solutions of sodium methanolate and 1,2-(HS)(2)C(6)H(4) in methanol gave after metathesis with [NEt(4)]Br yellow solutions of [NEt(4)](2)[{Tl(1,2-(&mgr;-S)(2)C(6)H(4))}(2)] ([NEt(4)](2)1). Yellow single crystals were obtained from saturated acetone solutions at -10 degrees C and the crystal data for [NEt(4)](2)1 are monoclinic, P2(1)/c, with Z = 2, a = 7...
October 23, 1996: Inorganic Chemistry
C Borland, Y Cox, T Higenbottam
BACKGROUND: Unexplained or primary pulmonary hypertension results in an obliteration and obstruction of resistance pulmonary arteries. In these patients gas exchange is impaired and the measurement of gas transfer for carbon monoxide is usually reduced. This has been thought to represent a reduction in pulmonary alveolar capillary blood volume (Vc). A single breath test, measuring simultaneously the uptake of both nitric oxide (NO) and carbon monoxide (CO), provides a simple and practical measurement of membrane diffusion (Dm) and Vc...
August 1996: Thorax
J Moinard, H Guenard
Patients with chronic renal failure (CRF) and haemodialysis treatment usually have a reduced CO transfer factor. The aim of this study was to evaluate the effects of alveolar wall fibrosis and of anaemia on gas diffusion in the lungs. The NO and CO transfer factors of the lung (TLNO and TLCO) were measured, simultaneously, in 15 patients haemodialysed three times a week for 1-10 yrs. Assuming that NO is highly reactive with blood, Tlno is thus directly proportional to the membrane diffusion factor (DmCO). The lung capillary blood volume (Vc) was derived from the set of the two transfer equations...
February 1993: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
H Guenard, N Varene, P Vaida
NO and CO lung transfer values (TL) were measured separately in 14 healthy subjects (7 men, 7 women), using the single breath technique. Five repetitive maneuvers were performed by each subject for TLNO and TLCO determinations. The inspired mixture contained either 8 ppm NO or 0.25% CO, with 2% He, 21% O2 in N2. In order to measure an appreciable fraction of NO in the alveolar gas it was necessary to shorten the breath holding time to 3 sec. TLNO was about five times greater than TLCO. This result suggests that the specific conductance of blood (theta) for NO is very high and that the second term of the second member of the equation 1/TLNO = 1/DmNO + 1/(theta NO...
October 1987: Respiration Physiology
J Moinard, H Guenard
Lung capillary blood volume (Qc) and the membrane diffusing capacity (Dm) can both be determined from the combined measurement of nitric oxide (NO) and carbon monoxide (CO) transfers using the single-breath method. In ten healthy subjects, no differences was observed between the values of transfer factor of the lungs for carbon monoxide (TLCO) recovered after a 3 s or 9 s breath-holding time (tBH). The NO-CO method could thus be used with a short tBH and a low fraction of inspired nitric oxide (FINO) (8 ppm)...
March 1990: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
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