1
|
Kosmidis C, Hashad R, Mathioudakis AG, McCahery T, Richardson MD, Vestbo J. Impact of self-reported environmental mould exposure on COPD outcomes. Pulmonology 2023; 29:375-384. [PMID: 34130917 DOI: 10.1016/j.pulmoe.2021.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 05/04/2021] [Accepted: 05/04/2021] [Indexed: 10/21/2022] Open
Abstract
BACKGROUND Indoor and outdoor mould exposure can affect respiratory symptoms, but its contribution to COPD outcomes such as exacerbation rates or antibiotics courses is not well defined. Some patients with COPD develop chronic pulmonary aspergillosis (CPA), but the contribution of environmental exposure is not known. METHODS We correlated activities or exposures related to mould with COPD outcomes in patients with COPD with or without CPA using a questionnaire. RESULTS One hundred and forty patients were included and 60 had CPA in addition to COPD. Seventy-six were male and mean age was 66.9 years (range 40-87). Thirty-nine (28%) were active cigarette smokers. On multivariate analysis, occupational contact with agricultural resources (p = 0.017), vacuuming once weekly or more often (p = 0.026) and not asking visitors to remove shoes on home entry (p = 0.035) were significantly more common in participants reporting ≥ 4 office visits for COPD symptoms in the last year. Living within one mile of industrial composting sites (p = 0.013), vacuuming once weekly or more often (p = 0.016) and not asking visitors to remove shoes on home entry (p = 0.028) were significantly more common in participants reporting ≥4 antibiotics courses in the last year. Patients with CPA showed a trend for residence within one mile of farms or agricultural areas (P = 0.088, OR 2, 95% CI 0.9-4.4). CONCLUSION Activities potentially leading to mould exposure were common in a population with COPD with or without CPA and were associated with adverse COPD outcomes. Environmental mould exposure may play a role in the development of CPA in patients with COPD.
Collapse
Affiliation(s)
- C Kosmidis
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester Academic Health Science Centre, United Kingdom; National Aspergillosis Centre, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester M23 9LT, United Kingdom.
| | - R Hashad
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester Academic Health Science Centre, United Kingdom; Department of Medical Microbiology and Immunology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - A G Mathioudakis
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester Academic Health Science Centre, United Kingdom; The North West Lung Centre, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester M23 9LT, United Kingdom
| | - T McCahery
- National Aspergillosis Centre, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester M23 9LT, United Kingdom
| | - M D Richardson
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester Academic Health Science Centre, United Kingdom; Mycology Reference Centre Manchester, ECMM Excellence Centre, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Southmoor Rd, Manchester M23 9LT, United Kingdom
| | - J Vestbo
- Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester Academic Health Science Centre, United Kingdom; The North West Lung Centre, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester M23 9LT, United Kingdom
| |
Collapse
|
2
|
Ocansey BK, Otoo B, Gbadamosi H, Opintan JA, Dei-Adomakoh Y, Kosmidis C, Denning DW. Invasive Aspergillosis among Haematological Malignancy Patients in Ghana: A Pilot Study on Prevalence and Antifungal Prophylaxis at the National Referral Hospital. West Afr J Med 2023; 40:613-618. [PMID: 37390225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2023]
Abstract
BACKGROUND Invasive aspergillosis (IA) among haematological malignancy patients is rarely diagnosed or studied in many African countries. Aspergillus galactomannan (GM) enzyme immunoassay (EIA) utilized in aiding diagnosis is not readily accessible in Ghana. Previous studies have evaluated the IMMY sōna Aspergillus GM lateral flow assay (LFA) and suggested it as a potential alternative to the GM EIA. OBJECTIVES We aimed to use the LFA in international (EORTC/ MSGERC) definitions to obtain preliminary data on IA among patients with haematological malignancies in Ghana with a focus on the prevalence and antifungal prophylaxis. METHODS We conducted a pilot study among patients with haematological malignancies at the Korle-Bu Teaching Hospital, Ghana using the LFA, culture and computed tomography scan to screen for and classify IA cases according to international definitions. RESULTS A total of 56 adult patients were recruited including acute leukaemia 14 (25.0%), chronic leukaemia 38 (67.9%), and lymphoma 4 (7.1%). Nine (16.1%) patients had a history of severe neutropenic episodes. All patients were on at least one chemotherapy drug. Three (5.4%) patients met the criteria for IA, comprising two probable IA in acute myeloid leukaemia and one possible IA in non-Hodgkin's lymphoma and constitutes one of five (20%) patients with ongoing severe neutropenia. The LFA was diagnostic in two IA patients. The IA cases were among 49 (87.5%) patients who did not receive antifungal prophylaxis. CONCLUSION Proactive diagnostic approaches to IA and effective antifungal prophylaxis may be significant in the management of haematological malignancy patients with severe neutropenia in Ghana.
Collapse
Affiliation(s)
- B K Ocansey
- Division of Evolution, Infection and Genomics, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - B Otoo
- Department of Bacteriology, University of Wisconsin-Madison, Madison, USA
| | - H Gbadamosi
- Radiology Department, Korle-Bu Teaching Hospital, Accra, Ghana
| | - J A Opintan
- Department of Medical Microbiology, University of Ghana Medical School, Accra, Ghana
| | - Y Dei-Adomakoh
- Department of Haematology, University of Ghana Medical School, Accra, Ghana
| | - C Kosmidis
- Division of Evolution, Infection and Genomics, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
- National Aspergillosis Centre, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester, UK
| | - D W Denning
- Division of Evolution, Infection and Genomics, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| |
Collapse
|
3
|
Bakarezos M, Tzianaki E, Petrakis S, Tsibidis G, Loukakos PA, Dimitriou V, Kosmidis C, Tatarakis M, Papadogiannis NA. Ultrafast laser pulse chirp effects on laser-generated nanoacoustic strains in Silicon. Ultrasonics 2018; 86:14-19. [PMID: 29407277 DOI: 10.1016/j.ultras.2018.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 12/20/2017] [Accepted: 01/16/2018] [Indexed: 06/07/2023]
Abstract
Nanoacoustic strains are generated in Silicon by chirped femtosecond laser pulses using thin Titanium films as transducers. We investigate the effect that the generating laser pulse chirp has on the amplitude of the induced strains, manifested as Brillouin oscillations observed in degenerate femtosecond pump-probe transient reflectivity measurements. The strain amplitude is larger when negatively chirped pulses are used, which is attributed to the more efficient conversion of laser pulse light into acoustic strain in the Titanium transducer. Our present studies clearly show that the dependence of the Brillouin amplitude and the lattice strain is a non-monotonous function of the laser chirp parameter. An optimum negative laser pulse chirp is found for which the strain amplitude is maximized. A detailed thermomechanical model satisfactorily supports the experimental findings. In such a way, it is possible to suppress or enhance the induced nanoacoustic strain amplitude, thus all-optically controlling it by at least a factor of two.
Collapse
Affiliation(s)
- M Bakarezos
- Centre for Plasma Physics and Lasers, School of Applied Sciences, Technological Educational Institute of Crete, Tria Monastiria, 741 00 Rethymno, Greece; Department of Music Technology & Acoustics Engineering, School of Applied Sciences, Technological Educational Institute of Crete, 1 E. Daskalaki Str., 741 33 Rethymno, Greece.
| | - E Tzianaki
- Physics Department, School of Sciences, University of Ioannina, 451 10 Ioannina, Greece
| | - S Petrakis
- Centre for Plasma Physics and Lasers, School of Applied Sciences, Technological Educational Institute of Crete, Tria Monastiria, 741 00 Rethymno, Greece
| | - G Tsibidis
- Foundation for Research and Technology - Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), N. Plastira 100, Vassilika Vouton, 700 13 Heraklion, Greece
| | - P A Loukakos
- Foundation for Research and Technology - Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), N. Plastira 100, Vassilika Vouton, 700 13 Heraklion, Greece
| | - V Dimitriou
- Centre for Plasma Physics and Lasers, School of Applied Sciences, Technological Educational Institute of Crete, Tria Monastiria, 741 00 Rethymno, Greece
| | - C Kosmidis
- Physics Department, School of Sciences, University of Ioannina, 451 10 Ioannina, Greece
| | - M Tatarakis
- Centre for Plasma Physics and Lasers, School of Applied Sciences, Technological Educational Institute of Crete, Tria Monastiria, 741 00 Rethymno, Greece
| | - N A Papadogiannis
- Centre for Plasma Physics and Lasers, School of Applied Sciences, Technological Educational Institute of Crete, Tria Monastiria, 741 00 Rethymno, Greece; Department of Music Technology & Acoustics Engineering, School of Applied Sciences, Technological Educational Institute of Crete, 1 E. Daskalaki Str., 741 33 Rethymno, Greece
| |
Collapse
|
4
|
Kotsina N, Kaziannis S, Kosmidis C. Elucidating the two and three-body fragmentation channels on isotopically labeled nitrous oxide by a two-color asymmetric laser field. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.03.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
5
|
Abstract
Investigation of the dynamics of toluene-h8 (C6H5CH3), toluene-d8 (C6D5CD3) and toluene-α,α,α-d3 (C6H5CD3) has been performed utilizing the VUV pump-IR probe technique on the fs timescale. Using the 5th harmonic (∼160 nm) of a Ti:sapphire laser as the pump beam, two superimposed electronic states, the valence S3 and the Rydberg 4p, were excited by one-photon absorption, followed by ionization and dissociation induced by the probe beam (800 nm). Analysis of the transient signal of the parent (P(+)) and fragment ions ([P-H](+) or [P-D](+)) implies the existence of two different relaxation processes: (i) from the Rydberg and (ii) from the S3 valence state. Using a rate equation model, the decay times have been determined and comparison between the different isotopologues has been made. Conclusions on the relaxation path, the relative displacements of the potential energy surfaces and the activation energies needed have been drawn from the decay times. The signals corresponding to the fragment ions present a small in amplitude, but nonetheless, unambiguous periodical modulation, which is attributed to out-of-plane bending oscillation, involving also the methyl group. The dynamics of the H- and D-loss channels has been investigated. Especially for the case of toluene-α,α,α-d3, where both channels are in operation, it was found that the ratio of the abundance of H/D-loss dissociation reactions decreases as the pump-probe delay time increases.
Collapse
Affiliation(s)
- C C Papadopoulou
- Department of Physics, Atomic and Molecular Physics Laboratory, University of Ioannina, University Campus, Ioannina GR-45110, Greece.
| | - S Kaziannis
- Department of Physics, Atomic and Molecular Physics Laboratory, University of Ioannina, University Campus, Ioannina GR-45110, Greece.
| | - C Kosmidis
- Department of Physics, Atomic and Molecular Physics Laboratory, University of Ioannina, University Campus, Ioannina GR-45110, Greece.
| |
Collapse
|
6
|
Kaziannis S, Kotsina N, Kosmidis C. Interaction of toluene with two-color asymmetric laser fields: Controlling the directional emission of molecular hydrogen fragments. J Chem Phys 2014; 141:104319. [DOI: 10.1063/1.4895097] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Kaziannis
- Department of Physics, Atomic and Molecular Physics Laboratory, University of Ioannina, University Campus, Ioannina GR-45110, Greece
| | - N. Kotsina
- Department of Physics, Atomic and Molecular Physics Laboratory, University of Ioannina, University Campus, Ioannina GR-45110, Greece
| | - C. Kosmidis
- Department of Physics, Atomic and Molecular Physics Laboratory, University of Ioannina, University Campus, Ioannina GR-45110, Greece
| |
Collapse
|
7
|
|
8
|
Kotsina N, Kaziannis S, Danakas S, Kosmidis C. Selective ionization/dissociation of oriented N2O molecules by asymmetric fs laser field. J Chem Phys 2013; 139:104313. [DOI: 10.1063/1.4820531] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
|
9
|
Polyzos A, Tsavaris N, Kosmas C, Gogas H, Toufexi H, Kosmidis C, Markopoulos C, Giannopoulos A, Papadopoulos O, Stamatiadis D, Kouraklis G. Full Dose Paclitaxel Plus Vinorelbine as Salvage Chemotherapy in Anthracycline-Resistant Advanced Breast Cancer: A Phase II Study. J Chemother 2013; 15:607-12. [PMID: 14998089 DOI: 10.1179/joc.2003.15.6.607] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
This phase II trial studied the efficacy and toxicity of full dose paclitaxel plus vinorelbine, as salvage chemotherapy in patients with metastatic breast cancer resistant to anthracyclines. Patients received vinorelbine (30 mg/m2) followed 1 hour later by full dose paclitaxel (175 mg/m2) every 3 weeks for a maximum of 8 cycles or until disease progression. Because of the heavy pretreatment of the patients, prophylactic granulocyte-colony stimulating factor (5 microg/kg) was administered daily for 5-10 days. To minimize potentially cumulative neurotoxicity due to both agents, amifostine was given prior to chemotherapy. Thirty-four patients: 8 with tumors primary resistant and 26 with tumors recurring within 3-6 months after anthracycline treatment, were evaluable for efficacy and toxicity. Objective responses occurred in 11 patients [32%; 95% confidence interval (CI): 16.3-47.7%), all partial responses. Responses were observed in lung and liver. The median response duration was 4 months (range 3-7), median time to progression was 5 months (range 3-9) and median overall survival was 8 months (range 4-24). Neutropenia was dose limiting (35% grade 3-4 toxicity). The left ventricular ejection fraction, measured and followed in 18 patients, fell less than 20% below baseline level in 9 patients (50%), but only one patient developed congestive cardiac failure. The paclitaxel-vinorelbine regimen was moderately tolerated and moderately effective in poor prognosis breast cancer patients with visceral metastases and tumors resistant to anthracyclines. The combination at these doses and schedules should be considered in the design of regimens for advanced breast cancer.
Collapse
Affiliation(s)
- A Polyzos
- Medical Oncology Unit, Laikon General Hospital, Athens University School of Medicine, 17 Agiou Thoma Street, Goudi, Athens, Greece
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Katsandri A, Avlamis A, Vasilakopoulou A, Mela V, Kosmidis C, Papaparaskevas J, Petrikkos G. Risk Factors for Coexistence of Fluoroquinolone Resistance and ESBL Production amongEnterobacteriaceaein a Greek University Hospital. J Chemother 2013; 20:452-7. [DOI: 10.1179/joc.2008.20.4.452] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
|
11
|
Efthimiadis C, Kosmidis C, Fotiadis P, Anthimidis G, Vasiliadou K, Mekras A, Ioannidou G, Basdanis G. Breast cancer metastatic to the rectum: a case report. Tech Coloproctol 2012; 15 Suppl 1:S91-3. [PMID: 21912949 DOI: 10.1007/s10151-011-0740-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
INTRODUCTION Patients with breast cancer may present with systemic recurrence in any organ, primarily the bones, lungs, lymph nodes, liver, pleura, and adrenal glands. We report a case of rectal tumor, metastatic from breast cancer, which represents an unusual location of metastasis. CASE PRESENTATION A 74-year-old woman, operated for lobular breast cancer 5 years ago, but not compliant with the annual follow-up, presented with severe constipation and pseudodiarrhea. Digital examination and anoscopy revealed a mass at the lower rectum, 2 cm distant from the anal verge. CT and MRI scan of the abdomen confirmed this finding and did not reveal metastatic lesions elsewhere. The patient underwent abdominoperineal resection. RESULTS The postoperative period was uneventful, and the patient was discharged on the 7th postoperative day. The histopathological findings revealed rectal cancer, metastatic from the known invasive lobular breast cancer. CONCLUSIONS Rectal metastasis from breast cancer is very rare. The presented case emphasizes the need to keep in mind this possibility and at all times associate the emergency condition with the related history of breast cancer.
Collapse
Affiliation(s)
- C Efthimiadis
- Department of Surgery, Interbalkan European Medical Center, Asklipiou 10, Pilea, Thessaloniki, Greece
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Siozios A, Koutsogeorgis DC, Lidorikis E, Dimitrakopulos GP, Kehagias T, Zoubos H, Komninou P, Cranton WM, Kosmidis C, Patsalas P. Optical encoding by plasmon-based patterning: hard and inorganic materials become photosensitive. Nano Lett 2012; 12:259-263. [PMID: 22132841 DOI: 10.1021/nl2034738] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The photosensitivity of nanocomposite AlN films with embedded silver nanospheres is reported. It stems from localized surface plasmon resonances (LSPR) whose modulation is photoinduced by laser annealing that induces a combined effect of metallic nanoparticle enlargement and dielectric matrix recrystallization; the photoindunced changes of the refractive index of the matrix result in strong spectral shift of LSPR. We demonstrate the utilization of this process for spectrally selective optical encoding into hard, durable, and chemically inert films.
Collapse
Affiliation(s)
- A Siozios
- Department of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece
| | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Stathopoulos KD, Kosmidis C, Lyritis GP. Atypical fractures of the femur and ulna and complications of fracture healing in a 76-year-old woman with Sjögren's syndrome. J Musculoskelet Neuronal Interact 2011; 11:208-211. [PMID: 21625058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Affiliation(s)
- K D Stathopoulos
- Bone Metabolic Unit, First Orthopaedic Department, University of Athens, "Attikon" University General Hospital, Greece.
| | | | | |
Collapse
|
14
|
Karras G, Danakas S, Kosmidis C. Formation of Molecular Halide Ions from Alkyl-Halide Clusters Irradiated by ps and fs Laser Pulses. J Phys Chem A 2011; 115:4186-94. [DOI: 10.1021/jp2015947] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- G. Karras
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
| | - S. Danakas
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
| | - C. Kosmidis
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
| |
Collapse
|
15
|
Vassilaki M, Sioulas A, Tsantekidou M, Klitsa A, Desses N, Georgakopoulos C, Kosmidis C, Tsionou C, Parassiris V, Xepapadakis G. P275 Platinum compounds (PLcs) added to standard adjuvant or neoadjuvant regimen of doxorubicin plus cyclophosphamide (AC), followed by weekly paclitaxel (wP) in triple negative (TN), HER 2-neu positive (HER 2+) or locally advanced breast cancer (LABC). Breast 2011. [DOI: 10.1016/s0960-9776(11)70217-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
|
16
|
Karras G, Kosmidis C. Angular distribution anisotropy of fragments ejected from methyl iodide clusters: Dependence on fs laser intensity. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.09.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
17
|
Daikos GL, Vryonis E, Psichogiou M, Tzouvelekis LS, Liatis S, Petrikkos P, Kosmidis C, Tassios PT, Bamias G, Skoutelis A. Risk factors for bloodstream infection with Klebsiella pneumoniae producing VIM-1 metallo- -lactamase. J Antimicrob Chemother 2010; 65:784-8. [DOI: 10.1093/jac/dkq005] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
18
|
Kaziannis S, Liontos I, Karras G, Corsi C, Bellini M, Kosmidis C. The ejection of triatomic molecular hydrogen ions H3+ produced by the interaction of benzene molecules with ultrafast laser pulses. J Chem Phys 2009; 131:144308. [DOI: 10.1063/1.3246832] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
|
19
|
Kosmidis C, Katsogianni K, Matsoukas S, Tsagarakis M, Georgiou P, Giannopoulou P, Liapi G, Antonopoulos A. A fatal case of cutaneous zygomycosis in a patient with severe metabolic acidosis. Mycoses 2009; 52:364-7. [DOI: 10.1111/j.1439-0507.2008.01596.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
20
|
Kaziannis S, Kosmidis C. The ejection anisotropy in the Coulomb explosion of some alkyl halide molecules under strong ps laser fields. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2008.11.068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
21
|
Nikou GC, Marinou K, Thomakos P, Papageorgiou D, Sanzanidis V, Nikolaou P, Kosmidis C, Moulakakis A, Mallas E. Chromogranin a levels in diagnosis, treatment and follow-up of 42 patients with non-functioning pancreatic endocrine tumours. Pancreatology 2008; 8:510-9. [PMID: 18765956 DOI: 10.1159/000152000] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2007] [Accepted: 11/06/2007] [Indexed: 12/11/2022]
Abstract
BACKGROUND/AIMS Non-functioning pancreatic endocrine tumours (NFPET) constitute the largest component (35-50%) of pancreatic endocrine tumours. They are characterized by the absence of symptoms of hormone hypersecretion and frequently have clinical manifestations similar to the more common exocrine pancreatic adenocarcinoma. The present studyaims toevaluate the clinical features, diagnostic approach and, in particular, the significance of serum chromogranin A levels (CgA) in the management and outcome of 42 patients with NFPET (from a series of 121 patients with pancreatic endocrine tumours). METHODS Twenty-five males and 17 females were included, and the mean age at diagnosis was 52.3 years (range: 26-68 years). The diagnosis for each patient was established by histopathological examination and immunohistochemistry. After the histopathological confirmation of diagnosis and during the follow-up period, patients were evaluated clinically and radiologically (including OctreoScan), whilst fasting gut hormones (including CgA) were also estimated. At diagnosis, all patients were checked for the presence of multiple endocrine neoplasia type I syndrome. The follow-up was complete and ranged from 12 to 86 months (mean: 49 months). RESULTS Dyspepsia (66.5%) and weight loss (47.6%) were the most common symptoms at diagnosis, while in 21.4% of patients tumour lesions were revealed incidentally. Plasma CgA levels were significantly or moderately elevated in all patients with liver metastases at diagnosis (64.3%). The levels also reflected tumour progression or response to treatment during the follow-up period. OctreoScan showed avid uptake in 77.8% of patients with hepatic metastases. Moreover, in 2 patients OctreoScan revealed unexpected metastatic mesenteric deposits, which had not been found by the other studies. However, it was negative in 6 patients with liver metastases, in whom tumours were proved to be poorly differentiated (high-grade). CONCLUSIONS (1) NFPET may present with clinical manifestations similar to those of an exocrine pancreatic tumour; (2) plasma CgA levels reflect tumour load, and also seem to correlate with tumour progression or response to treatment; (3) surgeryin patients with localized disease at presentation can be curative, while it can also reduce tumour burden in patients with metastases; (4) long-acting somatostatin analogues provide good quality of life and temporary disease stabilization in patients with low-grade tumours; (5) systemic chemotherapy or chemoembolization seem to be beneficial in high-grade and progressive tumours.
Collapse
Affiliation(s)
- G C Nikou
- 1st Department of Propaedeutic Internal Medicine, Medical School, University of Athens, Laikon Hospital, Athens, Greece.
| | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Kaziannis S, Kosmidis C, Lyras A. Alignment of Ethyl Halide Molecules (C2H5X, X= I, Br, Cl) Induced by Strong ps Laser Irradiation. J Phys Chem A 2008; 112:4754-64. [DOI: 10.1021/jp710540r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- S. Kaziannis
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
| | - C. Kosmidis
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
| | - A. Lyras
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
| |
Collapse
|
23
|
Prousalidis J, Kosmidis C, Anthimidis G, Fachantidis E, Harlaftis N, Aletras H. Forty-four years' experience (1963-2006) in the management of primarily infected hydatid cyst of the liver. HPB (Oxford) 2008; 10:18-24. [PMID: 18695754 PMCID: PMC2504849 DOI: 10.1080/13651820701854669] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2007] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIM The aim of this study was to report our 44-year experience (1963-2006) in the management of primarily infected hydatid cyst of the liver. This is a retrospective review of demographic data, clinical presentation, diagnostic work-up, surgical management, and long-term outcome of patients treated at our center. MATERIAL AND METHODS There were 77 patients with operated infected liver cysts. In the same period, a total of 460 cases with liver hydatidosis were treated surgically. Of those with suppurated cysts, 27 were men and 50 were women, with a mean age 54.5 years. RESULTS Clinical manifestations of an abscess were identified in 75% of the patients. In the earlier cases of the study, the diagnosis was made from the clinical picture, laboratory studies, in combination with plain X-ray, hepatic scintigraphy, and in the later cases with US (ultrasonography), CT (computed tomography) or MRI (magnetic resonance imaging), and ERCP (endoscopic cholangiopangreatography). Abdominal and, rarely, thoracic and abdominal or thoracoabdominal incisions were used. Total cystopericystectomy in 8 patients and partial pericystectomy and proper drainage with one or two drainage tubes of the cystic cavity in the other 69 patients were carried out. Hospital stay was between 13 and 146 days with 5 re-operations. Two patients with grossly suppurated cysts and coexistent medical problems died. The disease recurred in five patients. CONCLUSIONS. We conclude that, under good perioperative antibiotic and metabolic coverage, the infected hydatid cysts have to be completely evacuated and properly drained. The application of "conservative" surgical procedures should be preferred. Further studies are needed to solve the clinical and therapeutic problems of this serious complication.
Collapse
Affiliation(s)
- J. Prousalidis
- A’ Propedeutic Surgical Clinic, Aristotle's University of Thessaloniki, AHEPA HospitalThessalonikiGreece
| | - C. Kosmidis
- A’ Propedeutic Surgical Clinic, Aristotle's University of Thessaloniki, AHEPA HospitalThessalonikiGreece
| | - G. Anthimidis
- A’ Propedeutic Surgical Clinic, Aristotle's University of Thessaloniki, AHEPA HospitalThessalonikiGreece
| | - E. Fachantidis
- A’ Propedeutic Surgical Clinic, Aristotle's University of Thessaloniki, AHEPA HospitalThessalonikiGreece
| | - N. Harlaftis
- A’ Propedeutic Surgical Clinic, Aristotle's University of Thessaloniki, AHEPA HospitalThessalonikiGreece
| | - H. Aletras
- A’ Propedeutic Surgical Clinic, Aristotle's University of Thessaloniki, AHEPA HospitalThessalonikiGreece
| |
Collapse
|
24
|
Psichogiou M, Tassios PT, Avlamis A, Stefanou I, Kosmidis C, Platsouka E, Paniara O, Xanthaki A, Toutouza M, Daikos GL, Tzouvelekis LS. Ongoing epidemic of blaVIM-1-positive Klebsiella pneumoniae in Athens, Greece: a prospective survey. J Antimicrob Chemother 2007; 61:59-63. [PMID: 17999975 DOI: 10.1093/jac/dkm443] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVES To determine the current frequency and study the characteristics of VIM-1-producing Klebsiella pneumoniae isolates from bloodstream infections in Greek hospitals. METHODS All blood isolates of K. pneumoniae were prospectively collected during 2004-06 in three teaching hospitals located in Athens. MICs of antibiotics were determined by the Etest. Extended-spectrum- (ESBL) and metallo-beta-lactamase (MBL) production was examined by clavulanate- and EDTA-based techniques, respectively. Isolates were typed by PFGE of XbaI-digested genomic DNA. Detection of bla(VIM-1) and mapping of the VIM-1-encoding integrons were performed by PCR and sequencing. Beta-lactamase activities were analysed by IEF and imipenem hydrolysis was assessed by spectrophotometry. VIM-1-encoding plasmids were transferred to Escherichia coli by conjugation and transformation and characterized by Inc/rep typing and RFLP. RESULTS Sixty-seven (37.6%) of 178 K. pneumoniae blood isolates were bla(VIM-1)-positive (VPKP); 77.8% of these were from ICUs. All VPKP isolates were multidrug-resistant. The MICs of carbapenems for VPKP varied from the susceptible range to high-level resistance overlapping with those of MBL-negative isolates. The EDTA-imipenem synergy methods had reduced sensitivity in detecting VPKP isolates when the MICs were in the susceptible range. ESBL production was common among VPKP isolates (n = 45, 67.2%) as indicated by resistance to aztreonam and confirmed by a clavulanate-based double-disc synergy test. The responsible ESBL was always an SHV-5-type enzyme as indicated by IEF. PFGE identified eight clusters (A-H) of VPKP isolates with related (>80%) patterns, as well as four unique types. Both inter-hospital spread of several clones and genotypic similarities among susceptible, ESBL-positive and VPKP isolates were also observed. Location of bla(VIM-1) and expression of VIM-1 were studied in 12 isolates representing the eight PFGE clusters. In all isolates, bla(VIM-1) was part of a class 1 integron that also carried aacA4, dhfrI, aadA and sulI. In eight isolates (clusters C, D, G and H), the bla(VIM-1) integron was located in transferable IncN plasmids. A cluster F isolate carried a VIM-1-encoding, self-transferable plasmid that was not typeable by Inc/rep typing. VIM-1-encodingreplicons were not identified in three isolates (PFGE clusters A, B and E). VPKP isolates exhibited differences in imipenem-hydrolysing activities which, however, were not correlated with the respective carbapenem MICs. CONCLUSIONS A multiclonal epidemic of bla(VIM-1)-carrying K. pneumoniae is under way in the majorhospitals in Greece. Microorganisms producing both VIM-1 and SHV-5 constitute the prevalent multidrug-resistant population of K. pneumoniae in this setting.
Collapse
Affiliation(s)
- M Psichogiou
- First Department of Propaedeutic Medicine, Medical School, University of Athens, Athens, Greece
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Kaziannis S, Kosmidis C. Comparative Study of Multielectron Ionization of Alkyl Halides Induced by Picosecond Laser Irradiation. J Phys Chem A 2007; 111:2839-51. [PMID: 17388396 DOI: 10.1021/jp068300b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The interaction of C2H5X, 1-C3H7X, 1-C4H9X, where X = I, Br, Cl, with strong (1 x 10(13)-1.2 x 10(14) W/cm2) 35 ps laser pulses at 1064 nm is studied by means of time-of-flight mass spectrometry. The multielectron ionization following the C-X bond elongation has been verified for the studied molecules. By combination of the intensity dependence of the ion yields, the estimated kinetic energies of the released fragment ions, and their angular distributions, we have identified the different dissociation channels of the transient multiply charged parent ions. From the dependence on the laser intensity of the ratio of the doubly charged halogen ions to the singly charged ones, it is concluded that the molecular coupling with the laser field increases with the molecular size.
Collapse
Affiliation(s)
- S Kaziannis
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
| | | |
Collapse
|
26
|
Efthimiadis C, Basdanis G, Zatagias A, Tzeveleki I, Kosmidis C, Karamanlis E, Harlaftis N. Manometric and clinical evaluation of patients after low anterior resection for rectal cancer. Tech Coloproctol 2005; 8 Suppl 1:s205-7. [PMID: 15655624 DOI: 10.1007/s10151-004-0158-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The aim of this study was to examine the anorectal physiological and clinical changes that occur after low anterior resection for rectal cancer. Since 1998, 30 patients underwent laboratory tests of anorectal function, preoperatively and 1 month and 6 months after low anterior resection. Postoperatively all patients presented with increased bowel frequency, 60% of the patients with mild soiling and 30% with urgency for defecation. Six months after surgery there was a significant improvement of these symptoms. The anal resting pressure was significantly decreased postoperatively, while maximum squeezing pressure remained unchanged. The rectoanal inhibitory reflex was absent in 80% of the patients and at 6 months after surgery it tended to recover. Rectal capacity and compliance were reduced in all patients. In the current study, the majority of patients demonstrated manometric anorectal changes and clinical anorectal function disorders during the first year after surgery. We observed that these disorders correlated with the low level of the anastomosis.
Collapse
Affiliation(s)
- C Efthimiadis
- 1st Propedeutic Surgical Department, Aristotle University, AHEPA Hospital, Thessaloniki, Greece.
| | | | | | | | | | | | | |
Collapse
|
27
|
Kosmidis C, Siozos P, Kaziannis S, Robson L, Ledingham KWD, McKenna P, Jaroszynski DA. Interaction Mechanism of Some Alkyl Iodides with Femtosecond Laser Pulses. J Phys Chem A 2005; 109:1279-85. [PMID: 16833441 DOI: 10.1021/jp045500j] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The interaction of 1-iodopropane, 2-iodopropane, 1-iodobutane, 2-iodobutane, and 1-iodopentane with (5 x 10(13-)5 x 10(15) W/cm2) femtosecond laser fields is studied by means of a time-of-flight mass spectrometer. It is found that multiphoton ionization (MPI) and field ionization (FI) processes are involved in the molecular ionization. The contribution of these processes can be distinguished using the peak profile of the ions in the mass spectra. Thus, from the mass spectra of 2-iodoropane and 2-iodobutane, it is concluded that MPI processes are taking place even for Keldysh parameter values gamma approximately 0.3. The field ionization process depends on the characteristics of the molecular binding potential well and leads to an asymmetric charge distribution of the transient multiply charged parent ions. In the case of 1-iodobutane, the MPI processes lead to a stable doubly charged parent ion production with a laser intensity threshold higher than that found for I2+ ions. In addition, the isomers studied exhibit distinct differences in their mass spectra and their origin is discussed in detail.
Collapse
Affiliation(s)
- C Kosmidis
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece.
| | | | | | | | | | | | | |
Collapse
|
28
|
Kaskani E, Lyritis GP, Kosmidis C, Galanos A, Andypas G, Chorianopoulos K, Giagiosis A, Iliadou K, Karagianis A, Katsimichas K, Koskinas A, Matsouka K. Effect of intermittent administration of 200 IU intranasal salmon calcitonin and low doses of 1α(OH) vitamin D3 on bone mineral density of the lumbar spine and hip region and biochemical bone markers in women with postmenopausal osteoporosis: a pilot study. Clin Rheumatol 2005; 24:232-8. [PMID: 15647969 DOI: 10.1007/s10067-004-1004-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2004] [Accepted: 08/03/2004] [Indexed: 10/26/2022]
Abstract
A 1-year prospective, open, randomized, controlled trial was conducted as a pilot study to examine the effect of intermittent administration of 200 IU intranasal salmon calcitonin and 1alpha(OH) vitamin D3 [1alpha(OH)D3] on bone mineral density (BMD) of the lumbar spine and hip as well as on the markers of bone metabolism in women with postmenopausal osteoporosis. A total of 102 randomly recruited women received either 200 IU intranasal salmon calcitonin (Miacalcic nasal 200, Novartis, Basel, Switzerland) daily, 1 month on-1 month off, 0.25 mug 1alpha(OH)D3, and 500 mg elemental calcium continuously (n=57 women) or only 0.25 mug 1alpha(OH)D3 and 500 mg calcium (n=45 women) for a period of 1 year. BMD of the lumbar spine and hip plus biochemical markers reflecting calcium (Ca) metabolism and bone turnover [serum Ca, serum phosphorus, intact parathormone (iPTH), total and bone-specific alkaline phosphatase, osteocalcin levels, 24-h urinary Ca, morning fasting urinary Ca/creatinine, and Pyrilinks-D/creatinine ratio] were measured at the beginning of the study before treatment and after 6 and 12 months of treatment. Baseline characteristics of participants, including age, body mass index, lumbar and hip BMD, and biochemical markers were similar between the two groups. A total of 91 patients completed the study (50 in the salmon calcitonin nasal spray group and 41 in the other group). Lumbar BMD increased significantly in the salmon calcitonin group from baseline (3.0%, p=0.005) and in comparison to the non-calcitonin-treated group (p=0.009). The salmon calcitonin group also had a significant increase in femoral neck BMD compared with baseline values (3.1%, p=0.0005) and in comparison to the non-calcitonin-treated group (p=0.0005) in Ward's triangle BMD (2.9% from baseline values, p=0.009) and in comparison to the non-calcitonin-treated group (p=0.005) in trochanteric BMD (3.4% from baseline values, p=0.007) and in comparison to the non-calcitonin-treated group (P=0.01). Urinary Ca/creatinine and Pyrilinks-D/creatinine levels were significantly decreased from baseline in the salmon calcitonin-treated group (-6.1 and -6.3%, respectively, p=0.001). Bone-specific alkaline phosphatase levels were also significantly decreased from baseline in the salmon calcitonin-treated group (-3.6%, p=0.003). In the same group, a significant decrease in iPTH serum levels compared to baseline values (-2.5%, p=0.005) and in comparison to the non-calcitonin-treated group (p=0.005) was noted. In conclusion, in this pilot study, 1-year intermittent treatment with 200 IU intranasal salmon calcitonin and low doses of 1alpha(OH)D3 produced a significant effect on bone turnover and BMD in postmenopausal women with osteoporosis.
Collapse
Affiliation(s)
- Evangelia Kaskani
- Laboratory for the Research of the Musculoskeletal System (LRMS), KAT Hospital, Kifisia, Greece.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
|
30
|
Robson L, Ledingham K, Tasker A, McKenna P, McCanny T, Kosmidis C, Jaroszynski D, Jones D, Issac R, Jamieson S. Ionisation and fragmentation of polycyclic aromatic hydrocarbons by femtosecond laser pulses at wavelengths resonant with cation transitions. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)00872-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
31
|
Tasker AD, Robson L, Ledingham KWD, McCanny T, Hankin SM, McKenna P, Kosmidis C, Jaroszynski DA, Jones DR. A High Mass Resolution Study of the Interaction of Aromatic and Nitro-Aromatic Molecules with Intense Laser Fields. J Phys Chem A 2002. [DOI: 10.1021/jp013830n] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A. D. Tasker
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ Scotland, United Kingdom, Department of Physics, University of Ioannina, GR-45110, Ioannina, Greece, TOPS Laser Facility, Department of Physics and Applied Physics, University of Strathclyde G4 ONG, Scotland, United Kingdom, and AWE plc., Aldermaston, Reading RG7 4PR, United Kingdom
| | - L. Robson
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ Scotland, United Kingdom, Department of Physics, University of Ioannina, GR-45110, Ioannina, Greece, TOPS Laser Facility, Department of Physics and Applied Physics, University of Strathclyde G4 ONG, Scotland, United Kingdom, and AWE plc., Aldermaston, Reading RG7 4PR, United Kingdom
| | - K. W. D. Ledingham
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ Scotland, United Kingdom, Department of Physics, University of Ioannina, GR-45110, Ioannina, Greece, TOPS Laser Facility, Department of Physics and Applied Physics, University of Strathclyde G4 ONG, Scotland, United Kingdom, and AWE plc., Aldermaston, Reading RG7 4PR, United Kingdom
| | - T. McCanny
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ Scotland, United Kingdom, Department of Physics, University of Ioannina, GR-45110, Ioannina, Greece, TOPS Laser Facility, Department of Physics and Applied Physics, University of Strathclyde G4 ONG, Scotland, United Kingdom, and AWE plc., Aldermaston, Reading RG7 4PR, United Kingdom
| | - S. M. Hankin
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ Scotland, United Kingdom, Department of Physics, University of Ioannina, GR-45110, Ioannina, Greece, TOPS Laser Facility, Department of Physics and Applied Physics, University of Strathclyde G4 ONG, Scotland, United Kingdom, and AWE plc., Aldermaston, Reading RG7 4PR, United Kingdom
| | - P. McKenna
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ Scotland, United Kingdom, Department of Physics, University of Ioannina, GR-45110, Ioannina, Greece, TOPS Laser Facility, Department of Physics and Applied Physics, University of Strathclyde G4 ONG, Scotland, United Kingdom, and AWE plc., Aldermaston, Reading RG7 4PR, United Kingdom
| | - C. Kosmidis
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ Scotland, United Kingdom, Department of Physics, University of Ioannina, GR-45110, Ioannina, Greece, TOPS Laser Facility, Department of Physics and Applied Physics, University of Strathclyde G4 ONG, Scotland, United Kingdom, and AWE plc., Aldermaston, Reading RG7 4PR, United Kingdom
| | - D. A. Jaroszynski
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ Scotland, United Kingdom, Department of Physics, University of Ioannina, GR-45110, Ioannina, Greece, TOPS Laser Facility, Department of Physics and Applied Physics, University of Strathclyde G4 ONG, Scotland, United Kingdom, and AWE plc., Aldermaston, Reading RG7 4PR, United Kingdom
| | - D. R. Jones
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ Scotland, United Kingdom, Department of Physics, University of Ioannina, GR-45110, Ioannina, Greece, TOPS Laser Facility, Department of Physics and Applied Physics, University of Strathclyde G4 ONG, Scotland, United Kingdom, and AWE plc., Aldermaston, Reading RG7 4PR, United Kingdom
| |
Collapse
|
32
|
Hankin SM, Tasker AD, Robson L, Ledingham KWD, Fang X, McKenna P, McCanny T, Singhal RP, Kosmidis C, Tzallas P, Jaroszynski DA, Jones DR, Issac RC, Jamison S. Femtosecond laser time-of-flight mass spectrometry of labile molecular analytes: laser-desorbed nitro-aromatic molecules. Rapid Commun Mass Spectrom 2002; 16:111-116. [PMID: 11754256 DOI: 10.1002/rcm.553] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Femtosecond laser time-of-flight mass spectra of solid samples of trinitrobenzene (TNB), trinitrotoluene (TNT) and trinitrophenol (TNP) have been recorded. Desorption of the solid samples was enacted by the fourth harmonic output (266 nm) of a 5 ns Nd:YAG laser. Subsequent femtosecond post-ionisation of the plume of neutral molecules was achieved using 800 nm laser pulses of 80 fs duration. Mass spectra have been recorded for desorption laser intensities from 2-6 x 10(9) W cm(-2) with ionisation laser intensities between 2 x 10(14) and 6 x 10(15) W cm(-2). Femtosecond laser ionisation has been shown to be capable of generating precursor and characteristic high-mass fragment ions for labile nitro-aromatic molecules commonly used in high-explosive materials. This feature is critical in the future development of femtosecond laser-based analytical instruments that can be used for complex molecular identification and quantitative analysis of environmentally important labile molecules. Furthermore, a comparison of femtosecond post-ionisation mass spectra with standard 70 eV electron impact data has revealed similarities in the spectra and hence the fragmentation processes.
Collapse
Affiliation(s)
- S M Hankin
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, UK
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
|
34
|
Tzallas P, Kosmidis C, Ledingham KWD, Singhal RP, McCanny T, Graham P, Hankin SM, Taday PF, Langley AJ. On the Multielectron Dissociative Ionization of Some Cyclic Aromatic Molecules Induced by Strong Laser Fields. J Phys Chem A 2000. [DOI: 10.1021/jp001096m] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- P. Tzallas
- Atomic and Molecular Physics Laboratory, Department of Physics, P.O. Box 1186, University of Ioannina, GR-451 10 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, England, U.K
| | - C. Kosmidis
- Atomic and Molecular Physics Laboratory, Department of Physics, P.O. Box 1186, University of Ioannina, GR-451 10 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, England, U.K
| | - K. W. D. Ledingham
- Atomic and Molecular Physics Laboratory, Department of Physics, P.O. Box 1186, University of Ioannina, GR-451 10 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, England, U.K
| | - R. P. Singhal
- Atomic and Molecular Physics Laboratory, Department of Physics, P.O. Box 1186, University of Ioannina, GR-451 10 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, England, U.K
| | - T. McCanny
- Atomic and Molecular Physics Laboratory, Department of Physics, P.O. Box 1186, University of Ioannina, GR-451 10 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, England, U.K
| | - P. Graham
- Atomic and Molecular Physics Laboratory, Department of Physics, P.O. Box 1186, University of Ioannina, GR-451 10 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, England, U.K
| | - S. M. Hankin
- Atomic and Molecular Physics Laboratory, Department of Physics, P.O. Box 1186, University of Ioannina, GR-451 10 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, England, U.K
| | - P. F. Taday
- Atomic and Molecular Physics Laboratory, Department of Physics, P.O. Box 1186, University of Ioannina, GR-451 10 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, England, U.K
| | - A. J. Langley
- Atomic and Molecular Physics Laboratory, Department of Physics, P.O. Box 1186, University of Ioannina, GR-451 10 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, England, U.K
| |
Collapse
|
35
|
Tzallas P, Kosmidis C, Graham P, Ledingham K, McCanny T, Hankin S, Singhal R, Taday P, Langley A. Coulomb explosion in aromatic molecules and their deuterated derivatives. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)01285-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
36
|
Kosmidis C, Tzallas P, Ledingham KWD, McCanny T, Singhal RP, Taday PF, Langley AJ. Multiply Charged Intact Ions of Polyatomic Cyclic Molecules Generated by a Strong Laser Field. J Phys Chem A 1999. [DOI: 10.1021/jp990692h] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C. Kosmidis
- Physics Department, University of Ioannina, 45110 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX England, U.K
| | - P. Tzallas
- Physics Department, University of Ioannina, 45110 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX England, U.K
| | - K. W. D. Ledingham
- Physics Department, University of Ioannina, 45110 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX England, U.K
| | - T. McCanny
- Physics Department, University of Ioannina, 45110 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX England, U.K
| | - R. P. Singhal
- Physics Department, University of Ioannina, 45110 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX England, U.K
| | - P. F. Taday
- Physics Department, University of Ioannina, 45110 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX England, U.K
| | - A. J. Langley
- Physics Department, University of Ioannina, 45110 Ioannina, Greece, Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., and Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX England, U.K
| |
Collapse
|
37
|
Abstract
Hydatid disease of the liver is still a major cause of morbidity in Greece. Beside the common complications of rupture and suppuration, calcification of the hepatic cysts represent a not well studied, less frequent and sometimes difficult surgical problem. In the present study 75 cases with calcified symptomatic liver echinococcosis were operated on in the 1st Propedeutic Surgical Clinic between 1964 to 1996. Twenty-eight patients were male and 47 female with ages from 23 to 78 years. The diagnosis was based mainly on the clinical picture and radiological studies. In 5 cases the operative method was cystopericystectomy. We performed evacuation of the cystic cavity and partial pericystectomy and primary closure of the residual cavity in 6 cases, omentoplasty or filling of the residual cavity with a piece of muscle of the diaphragm in 4 cases and external drainage by closed tube, in 60 cases. In 12 of those with drainage, after a period of time, a second operation with easy, removal of most of the calcareous wall plaques was performed. The mortality rate was 2%. Our results could be considered satisfactory. In the calcified parasitic cysts of the liver the proposed technique is cystopericystectomy. An alternative procedure is pericystectomy and drainage with a "planned" reoperation with a bloodless, due to intervening inflammation, chiseling of the calcification.
Collapse
Affiliation(s)
- J Prousalidis
- 1st Propedeutic Surgical Clinic A.U.T. A.H.E.P.A. Hospital, Thessaloniki, Greece
| | | | | | | | | |
Collapse
|
38
|
Ledingham KWD, Smith DJ, Singhal RP, McCanny T, Graham P, Kilic HS, Peng WX, Langley AJ, Taday PF, Kosmidis C. Multiply Charged Ions from Aromatic Molecules Following Irradiation in Intense Laser Fields. J Phys Chem A 1999. [DOI: 10.1021/jp984359+] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
39
|
|
40
|
Smith DJ, Ledingham KW, Singhal RP, McCanny T, Graham P, Kilic HS, Tzallas P, Kosmidis C, Langley AJ, Taday PF. The onset of coulomb explosions in polyatomic molecules. Rapid Commun Mass Spectrom 1999; 13:1366-1373. [PMID: 10407326 DOI: 10.1002/(sici)1097-0231(19990730)13:14<1366::aid-rcm644>3.0.co;2-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
With the development of high intensity femtosecond lasers, the ionisation and dissociation dynamics of molecules has become an area of considerable interest. Using the technique of femtosecond laser mass spectrometry (FLMS), the molecules carbon disulphide, pyrimidine, toluene, cyclohexanone and benzaldehyde are studied with pulse widths of 50 fs in the near infrared (IR) wavelength region (790 nm). Results are presented and contrasted for laser beam intensities around 10(15) and 10(16) W cm(-2). For the lower intensities, the mass spectra yield dominant singly charged parent ions. Additionally, the appearance of doubly charged parent ions is evident for carbon disulphide, toluene and benzaldehyde with envelopes of doubly charged satellite species existing in these local regions. Carbon disulphide also reveals a small triply charged component. Such atomic-like features are thought to be a strong fingerprint of FLMS at these intensities. However, upon increasing the laser intensity to approximately 10(16) W cm(-2), parent ion dominance decreases and the appearance of multiply charged atomic species occurs, particularly carbon. This phenomenon has been attributed to Coulomb explosions in which the fast absorption of many photons may produce transient highly ionised parent species which can subsequently blow apart. Copyright 1999 John Wiley & Sons, Ltd.
Collapse
Affiliation(s)
- DJ Smith
- Department of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ. Scotland, UK
| | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Ledingham KWD, Singhal RP, Smith DJ, McCanny T, Graham P, Kilic HS, Peng WX, Wang SL, Langley AJ, Taday PF, Kosmidis C. Behavior of Polyatomic Molecules in Intense Infrared Laser Beams. J Phys Chem A 1998. [DOI: 10.1021/jp9816162] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. W. D. Ledingham
- Department of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, England, U.K., and Department of Physics, University of Ioannina, Greece
| | - R. P. Singhal
- Department of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, England, U.K., and Department of Physics, University of Ioannina, Greece
| | - D. J. Smith
- Department of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, England, U.K., and Department of Physics, University of Ioannina, Greece
| | - T. McCanny
- Department of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, England, U.K., and Department of Physics, University of Ioannina, Greece
| | - P. Graham
- Department of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, England, U.K., and Department of Physics, University of Ioannina, Greece
| | - H. S. Kilic
- Department of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, England, U.K., and Department of Physics, University of Ioannina, Greece
| | - W. X. Peng
- Department of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, England, U.K., and Department of Physics, University of Ioannina, Greece
| | - S. L. Wang
- Department of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, England, U.K., and Department of Physics, University of Ioannina, Greece
| | - A. J. Langley
- Department of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, England, U.K., and Department of Physics, University of Ioannina, Greece
| | - P. F. Taday
- Department of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, England, U.K., and Department of Physics, University of Ioannina, Greece
| | - C. Kosmidis
- Department of Physics & Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K., Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, England, U.K., and Department of Physics, University of Ioannina, Greece
| |
Collapse
|
42
|
Smith DJ, Ledingham KWD, Kilic HS, McCanny T, Peng WX, Singhal RP, Langley AJ, Taday PF, Kosmidis C. Ionization and Dissociation of Benzaldehyde Using Short Intense Laser Pulses. J Phys Chem A 1998. [DOI: 10.1021/jp9802127] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | - C. Kosmidis
- Department of Physics, University of Ionannina, Greece
| |
Collapse
|
43
|
Kosmidis C, Ledingham KWD, Kilic HS, McCanny T, Singhal RP, Langley AJ, Shaikh W. On the Fragmentation of Nitrobenzene and Nitrotoluenes Induced by a Femtosecond Laser at 375 nm. J Phys Chem A 1997. [DOI: 10.1021/jp963187i] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C. Kosmidis
- Department of Physics, University of Ioannina, Ioannina GR-45110, Greece
| | | | | | | | | | | | | |
Collapse
|
44
|
Kilic HS, Ledingham KWD, Kosmidis C, McCanny T, Singhal RP, Wang SL, Smith DJ, Langley AJ, Shaikh W. Multiphoton Ionization and Dissociation of Nitromethane Using Femtosecond Laser Pulses at 375 and 750 nm. J Phys Chem A 1997. [DOI: 10.1021/jp962495d] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- H. S. Kilic
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, Department of Physics, University of Ioannina, GR-45110 Ioannina, Greece, and Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - K. W. D. Ledingham
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, Department of Physics, University of Ioannina, GR-45110 Ioannina, Greece, and Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - C. Kosmidis
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, Department of Physics, University of Ioannina, GR-45110 Ioannina, Greece, and Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - T. McCanny
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, Department of Physics, University of Ioannina, GR-45110 Ioannina, Greece, and Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - R. P. Singhal
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, Department of Physics, University of Ioannina, GR-45110 Ioannina, Greece, and Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - S. L. Wang
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, Department of Physics, University of Ioannina, GR-45110 Ioannina, Greece, and Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - D. J. Smith
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, Department of Physics, University of Ioannina, GR-45110 Ioannina, Greece, and Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - A. J. Langley
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, Department of Physics, University of Ioannina, GR-45110 Ioannina, Greece, and Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| | - W. Shaikh
- Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, Department of Physics, University of Ioannina, GR-45110 Ioannina, Greece, and Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, U.K
| |
Collapse
|
45
|
Singhal R, Kilic H, Ledingham K, Kosmidis C, McCanny T, Langley A, Shaikh W. Multiphoton ionisation and dissociation of NO2 by 50 fs laser pulses. Chem Phys Lett 1996. [DOI: 10.1016/0009-2614(96)00226-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
46
|
Scott CTJ, Kosmidis C, Jia WJ, Ledingham KWD, Singhal RP. Investigations of desorbed species from matrix materials used in MALDI. ACTA ACUST UNITED AC 1995. [DOI: 10.1063/1.47635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
|
47
|
|
48
|
Marshall A, Clark A, Deas RM, Kosmidis C, Ledingham KWD, Peng W, Singhal RP. Sensitive atmospheric pressure detection of nitroaromatic compounds and NO x (x= 1,2) molecules in an ionization chamber using resonance-enhanced multi-photon ionization. Analyst 1994. [DOI: 10.1039/an9941901719] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|