251
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Leon LE, Ríos A, Luque de Castro MD, Valcárcel M. Use of photochemical reactions in flow injection: determination of oxalate in urine. Analyst 1990; 115:1549-52. [PMID: 2080806 DOI: 10.1039/an9901501549] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The use of photochemical reactions in flow injection (FI) is reported. The irradiation of an FI reactor with a suitable source facilitates the development of the iron(III)-oxalate reaction, allowing the amperometric determination of the anion in the range 1.0-13.0 micrograms ml-1, with a relative standard deviation of 1.1% and a sampling frequency of 40 h-1. The proposed method was applied successfully to the determination of oxalate in urine samples.
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252
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Ríos A, Cañizo MC, Sanz MA, Vallespí T, Sanz G, Torrabadella M, Gomis F, Ruiz C, San Miguel JF. Bone marrow biopsy in myelodysplastic syndromes: morphological characteristics and contribution to the study of prognostic factors. Br J Haematol 1990; 75:26-33. [PMID: 2375920 DOI: 10.1111/j.1365-2141.1990.tb02612.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Ten characteristics of bone marrow (BM) biopsies in paraffin sections, obtained at diagnosis from patients with myelodysplastic syndromes (MDS) classified according to the FAB criteria, were analysed to identify both the most relevant morphologic data and any possible influence on survival. Agreement between two observers was obtained for 94% of the data. BM cellularity was increased in 63% of the cases and was higher in refractory anaemia with excess of blasts (RAEB). RAEB in transformation (RAEB-t) and chronic myelomonocytic leukaemia (CMML) (P = 0.001). Dysmegakaryopoiesis and dyserythropoiesis were present respectively in 83% and 72% of the cases, with slight differences among the FAB subtypes. Abnormal localization of immature precursors (ALIP) was found in more than half of the cases and somewhat more frequently seen in the RAEB + RAEB-t + CMML group (P = 0.07). Eosinophilia, plasmacytosis and reticulin fibrosis were evident in 26%, 18% and 47% of the cases respectively. Cellularity (P = 0.006), eosinophilia (P = 0.009) and, to some extent, dysmegakaryopoiesis (P = 0.07) bore a certain relationship with survival on univariate analysis. The presence of ALIP was not seen to affect the outcome. Multivariate analysis showed that the cellularity and presence of dysmegakaryopoiesis, in BM biopsy, added significant independent prognostic information to that achieved with age, platelet count and proportion of blast cells in BM aspirate, three variables with proven prognostic value in MDS patients. Using a regression model including these five characteristics we have stratified the patients into low, intermediate and high-risk groups with different survivals (P = 0.00001). The present findings show that BM biopsy is able to provide both morphological characteristics and information about the prognosis of survival, and should thus be included in the initial evaluation of MDS.
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253
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Agudo M, Marcos J, Ríos A, Valcárcel M. Analytical potential of flow gradients in unsegmented flow systems. Anal Chim Acta 1990. [DOI: 10.1016/s0003-2670(00)83855-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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254
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Woscoff A, Remondino G, Jaimovich L, Berengust G, Ríos A. Progressive systemic sclerosis and pemphigus vulgaris. J Am Acad Dermatol 1989; 21:142-4. [PMID: 2745765 DOI: 10.1016/s0190-9622(89)80358-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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255
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Canete F, Ríos A, De Castro M, Valcárel M. Kinetics of ion-pair extraction in continuous flow systems. Anal Chim Acta 1989. [DOI: 10.1016/s0003-2670(00)86557-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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256
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San Miguel JF, Tomás JF, Martín MJ, Ríos A, Moraleda JM, Cañizo MC, González M, Nieto MJ, Sánchez J, López Borrasca A. [Non-Hodgkin's lymphomas. II. Prognostic factors]. SANGRE 1988; 33:367-71. [PMID: 3247618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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257
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Ojeda E, San Miguel JF, González M, Cañizo C, Orfao A, Ríos A, López-Borrasca A. [Comparative study of the FAB classification and an immunologic classification model for the acute myeloid leukemias]. SANGRE 1988; 33:291-5. [PMID: 3187847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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258
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Del Cañizo MC, Ojeda E, San Miguel JF, Brufau A, González M, Orfao A, Ríos A, López Borrasca A. [Effect of a leukocyte medium conditioned with PHA on the proliferation and differentiation of leukemic cells]. SANGRE 1988; 33:15-9. [PMID: 3381162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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259
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Cañete F, Ríos A, de Castro MDL, Valcárcel M. Determination of pH, conductivity, residual chlorine and ammonium and nitrite lons in water with an unsegmented flow configuration. Analyst 1988. [DOI: 10.1039/an9881300739] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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260
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Cañete F, Ríos A, Luque de Castro MD, Valcárcel M. Determination of analytical parameters in drinking water by flow injection analysis. Part 2. Simultaneous determination of calcium and magnesium. Analyst 1987; 112:267-70. [PMID: 3592237 DOI: 10.1039/an9871200267] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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261
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Cañete F, Ríos A, Luque de Castro MD, Valcárcel M. Determination of analytical parameters in drinking water by flow injection analysis. Part 1. Simultaneous determination of pH, alkalinity and total ionic concentration. Analyst 1987; 112:263-6. [PMID: 3592236 DOI: 10.1039/an9871200263] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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262
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Ríos A, Lázaro F, de Castro M, Valcárcel M. Multidetection flow-injection techniques for manipulation of sensitivity. Anal Chim Acta 1987. [DOI: 10.1016/s0003-2670(00)82793-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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263
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Lázaro F, Ríos A, Luque de Castro MD, Valcárcel M. Determination of vitamin C by flow injection analysis. Analyst 1986; 111:163-6. [PMID: 3706760 DOI: 10.1039/an9861100163] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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264
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Lázaro F, Ríos A, Luque de Castro MD, Valcárcel M. Determination of vitamin C in urine by flow injection analysis. Analyst 1986; 111:167-9. [PMID: 3706761 DOI: 10.1039/an9861100167] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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265
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Ríos A, de Castro M, Valcárcel M. Simultaneous flow-injection flourimetric determination of ammonia and hydrazine with a novel mode of forming pH gradients. Anal Chim Acta 1986. [DOI: 10.1016/s0003-2670(00)82906-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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266
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Ruz J, Ríos A, de Castro M, Valcárcel M. Flow-injection configurations for chromium speciation with a single spectrophotometric detector. Anal Chim Acta 1986. [DOI: 10.1016/s0003-2670(00)81782-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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267
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Ríos A, de Castro M, Valcárcel M. Simultaneous determination by iterative spectrophotometric detection in a closed flow system. Anal Chim Acta 1986. [DOI: 10.1016/s0003-2670(00)84493-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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268
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Rozman C, Montserrat E, Rodríguez Fernández JM, Ayats R, Vallespí T, Parody R, Ríos A, Prados D, Morey M, Gomis F. [Prognosis of chronic lymphatic leukemia: clinical stage or bone marrow histopathology?]. Med Clin (Barc) 1985; 85:521-4. [PMID: 4079515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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269
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Ríos A, De Castro M, Valcárcel M. Spectrophotometric determination of acidity-constants of unstable compounds by flow injection analysis. Anal Chim Acta 1985. [DOI: 10.1016/s0003-2670(00)84208-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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270
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Ríos A, Moraleda JM, del Cañizo MC, Sastre R. [Sideroblastic anemia and tuberculosis]. Med Clin (Barc) 1985; 84:125-6. [PMID: 3974363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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271
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Ríos A, De Castro MD, Valcárcel M. Flow injection analysis: A new approach to pharmaceutical determinations. J Pharm Biomed Anal 1985; 3:105-12. [PMID: 16867693 DOI: 10.1016/0731-7085(85)80014-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/1984] [Indexed: 10/18/2022]
Abstract
A review is presented in which the fundamental principles, instrumentation and practical aspects of flow injection analysis (FIA) are discussed. A particular focus is put on applications in pharmaceutical chemistry, which offers a wide scope to the new technique.
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272
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Ríos A, Luque de Castro MD, Valcárcel M. New approach to the simultaneous determination of pollutants in waste waters by flow injection analysis. Part I. Anionic pollutants. Analyst 1984; 109:1487-92. [PMID: 6529009 DOI: 10.1039/an9840901487] [Citation(s) in RCA: 37] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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273
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Rozman C, Montserrat E, Rodríguez-Fernández JM, Ayats R, Vallespí T, Parody R, Ríos A, Prados D, Morey M, Gomis F. Bone marrow histologic pattern--the best single prognostic parameter in chronic lymphocytic leukemia: a multivariate survival analysis of 329 cases. Blood 1984; 64:642-8. [PMID: 6466871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
In previous studies, the prognostic value of bone marrow (BM) histologic patterns in chronic lymphocytic leukemia (CLL) has been demonstrated. In order to investigate whether such a value is independent of other prognostic parameters, a multivariate survival analysis (Cox's regression model) was undertaken in a series of 329 CLL patients in whom a BM had been performed. The following binary variables were included in the analysis: age (more than 60 years), lymphadenopathy (more than two areas involved), splenomegaly, hepatomegaly, absolute lymphocyte count (more than 30,000 microL), anemia (hemoglobin less than 10 g/dL), thrombocytopenia (less than 100,000 microL), and BM pattern (diffuse v nondiffuse). Three variables entered the regression at significant level: BM pattern (P less than .001), anemia (P less than .001), and hepatomegaly (P = .03). The model was also tested by expressing the variables in a continuous way when possible. Again, BM pattern entered first in the regression (P less than .001), followed by the hepatomegaly (P = .002), hemoglobin level (P = .02), and lymphadenopathy (P = .04). When both the binary and the continuous models were tested separately in 227 patients with BM as initial staging procedure and in 102 patients in whom this was performed later during the course of the disease, in all instances, BM pattern entered first in the regression at a highly significant level. BM histologic pattern appears to be a better single prognostic parameter than any one of the variables employed in current clinical staging systems. A combined clinicopathologic system incorporating the BM pattern, together with the usual clinical variables, is presented.
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274
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Ríos A, Rozman C, Del Cañizo MC, Brugués R. [Analysis of the effect of cellular morphology on obtaining a complete remission in 99 cases of acute leukemia]. SANGRE 1984; 29:273-279. [PMID: 6592764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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275
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Ostos MV, Peinado MA, Cuadros MA, Ríos A. [Analysis of the distribution of neuronal cytomorphometric parameters in the dorsal lateral geniculate nucleus of the rat]. TRABAJOS DEL INSTITUTO CAJAL 1984; 75:91-8. [PMID: 6545982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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