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[Antimicrobial peptides: A new alternative for the treatment of aspergillosis]. Rev Mal Respir 2024; 41:283-288. [PMID: 38458868 DOI: 10.1016/j.rmr.2024.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 02/05/2024] [Indexed: 03/10/2024]
Abstract
Aspergillus fumigatus is the predominant fungal species causing pulmonary aspergillosis. The present-day anti-aspergillosis arsenal is limited, with a number of molecules occasioning severe side effects (amphotericin B) or provoking significant drug interactions (azole derivatives). Moreover, the recent emergence of azole-resistant A. fumigatus strains is a cause for concern. In this context, antimicrobial peptides (AMPs) are emerging as a promising therapeutic approach and alternative or complement to conventional antifungals.
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410: Pseudomonas aeruginosa modulates SARS-CoV-2 infectivity in CF airway epithelial cells by increasing expression of the host protease TMPRSS2. J Cyst Fibros 2021. [PMCID: PMC8518457 DOI: 10.1016/s1569-1993(21)01834-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Use of the Xpert CarbaR assay for direct detection of carbapenemase genes from blood cultures and urine samples. J Hosp Infect 2017; 98:245-246. [PMID: 28970052 DOI: 10.1016/j.jhin.2017.09.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 09/26/2017] [Indexed: 10/18/2022]
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Analyse des modifications phénotypiques et transcriptomiques lymphocytaires de patients transplantés rénaux traités par fortes doses d’immunoglobulines intraveineuses. Nephrol Ther 2017. [DOI: 10.1016/j.nephro.2017.08.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Transcriptomic Signature of the CD24 hi CD38 hi Transitional B Cells Associated With an Immunoregulatory Phenotype in Renal Transplant Recipients. Am J Transplant 2016; 16:3430-3442. [PMID: 27273606 DOI: 10.1111/ajt.13904] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 05/25/2016] [Accepted: 05/27/2016] [Indexed: 01/25/2023]
Abstract
The role of B cells after transplant regarding allograft rejection or tolerance has become a topic of major interest. Recently, in renal transplant recipients, a B cell signature characterized by the overexpression of CD19+ CD38hi CD24hi transitional B cells has been observed in operationally tolerant patients and in belatacept-treated patients with significantly lower incidence of donor-specific antibodies. The phenotypic and functional characterization of these transitional B cells is far from exhaustive. We present the first transcriptomic and phenotypic analysis associated with this cell phenotype. Three populations were studied and compared: (i) transitional CD24hi CD38hi , (ii) CD24+ CD38- , and (iii) CD24int CD38int B cells. Transcriptome bioinformatic analysis revealed a particular signature for the CD24hi CD38hi population. Phenotypic analysis showed that CD24hi CD38hi transitional B cells also expressed CD9, CD10, CD1b and inducible T cell costimulator ligand (ICOS-L) markers. In addition, we found enrichment of IL-10+ cells among CD24hi CD38hi cells expressing ICOS-L and CD1b, the latter showing regulatory properties. Renal transplant recipients treated with belatacept exhibited significant expression of CD1b. Our results show that transitional CD24hi CD38hi B cells exhibit a distinct and specific profile, and this could be helpful for understanding of immune-regulatory mechanisms and immune monitoring in the field of organ transplant and autoimmune disease.
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How to improve the preoperative staging of presumed early-stage endometrioid endometrial cancer? EUR J GYNAECOL ONCOL 2015; 36:698-702. [PMID: 26775355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
PURPOSE OF INVESTIGATION Accurate preoperative staging of early-stage endometrioid endometrial cancer (EEC) is necessary to avoid under or over surgical treatment. The objective is to determine the rate of understaging and to evaluate the accuracy of different methods: hysteroscopy-curettage versus endometrial biopsy in predicting the final stage. MATERIALS AND METHODS This retrospective single-centre study led from 2000 to 2010, included women with EEC preoperatively assessed at low- or intermediate-risk. Understaging was defined as a postoperative FIGO Stage > 1 or a determination of high risk after the final histopathologic diagnosis. RESULTS The study included 101 women (75 low-risk and 26 intermediate-risk). Final diagnosis was upstaged for 26 of them, more frequently in the presumed intermediate-risk group (57.7% vs 14.7%, p < 0.001). The rate of preoperative understaging was higher in the women with endometrial biopsies than those with curettage (34.5% vs 15.2%, p = 0.04). CONCLUSIONS Hysteroscopy-curettage combined with magnetic resonance imaging (MRI) may improve preoperative staging of early-stage EEC, especially for presumed intermediate-risk disease.
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Prévention de la pénibilité : harmonisation des pratiques en Picardie. ARCH MAL PROF ENVIRO 2014. [DOI: 10.1016/j.admp.2014.03.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kidney transplant recipients treated with belatacept exhibit increased naïve and transitional B cells. Am J Transplant 2014; 14:1173-82. [PMID: 24730563 DOI: 10.1111/ajt.12721] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 02/05/2014] [Accepted: 02/24/2014] [Indexed: 01/25/2023]
Abstract
Phase III clinical studies have shown that kidney transplant (KT) recipients treated with the costimulation blocker belatacept exhibited a better renal allograft function and lower donor-specific anti-HLA immunization when compared to recipients treated with calcineurin inhibitors (CNI). We analyzed B cell phenotype in KT recipients treated with belatacept and stable renal function (N = 13). Results were compared to those observed in stable patients treated with CNI (N = 12), or with chronic antibody-mediated rejection (N = 5). Both transcriptional profile and phenotypic characterization of peripheral B cells were performed by real-time polymerase chain reaction and flow cytometry, respectively. In belatacept group, the frequency and absolute number of transitional B cells as defined by both phenotypes: CD19(+) CD24(hi) CD38(hi) and CD19(+) IgD(hi) CD38(hi) CD27(-) , as well as naïve B cells were significantly higher compared with CNI group. B cell activating factor (BAFF) and BAFF receptor mRNA levels were significantly lower in belatacept group than in CNI group. These results show for the first time that belatacept influences B cell compartment by favoring the occurrence of transitional B cells with potential regulatory properties, as described in operational tolerant patients. This role may explain the lower alloimmunization rate observed in belatacept-treated patients.
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Does a combination of ultrasound, MRI, and biochemical amniotic fluid analysis improve prenatal diagnosis of esophageal atresia? Prenat Diagn 2014; 34:839-42. [DOI: 10.1002/pd.4376] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 03/31/2014] [Accepted: 03/31/2014] [Indexed: 11/10/2022]
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[Esophageal atresia: prevalence, prenatal diagnosis and prognosis]. ACTA ACUST UNITED AC 2014; 43:424-30. [PMID: 24440126 DOI: 10.1016/j.jgyn.2013.11.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2013] [Revised: 11/10/2013] [Accepted: 11/19/2013] [Indexed: 01/29/2023]
Abstract
Esophageal atresia (EA) is a rare congenital malformation (1 in 2,500 to 3,500 births). Prenatal diagnosis (PN) is particularly interesting allowing search for associated malformations related to worse prognosis forms (reference ultrasound, MRI and amniocentesis) and planning the birth in an adapted medico-surgical center. Diagnosis of EA is usually suspected because of indirect and non-specific signs: association of polyhydramnios and absent or small stomach bubble. The visualization in ultrasound or MRI of cervical or thoracic fluid image corresponding to the expansion of the bottom of upper esophageal ("pouch sign") increases the specificity of diagnosis. However, prenatal diagnosis remains difficult and less than 50 % of EA are diagnosed prenatally. Biochemical analysis could improve these results. If EA is confirmed at birth, surgical management consists in a primary end-to-end anastomosis in first days of life, or in two-steps surgery if the defect is too large. Although current prognosis of EA is good, frequency of surgical complications and esophageal lesions secondary to gastroesophageal reflux justify a systematic and multidisciplinary extended follow-up.
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Le regard d’EVREST sur la pénibilité et la problématique d’âge. ARCH MAL PROF ENVIRO 2012. [DOI: 10.1016/j.admp.2012.03.411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abstract
We report a series of three cases of progressive anterior vertebral fusion diagnosed and monitored in our establishment. This very rare condition was discovered in young children while exploring a spinal deformity. With X-rays of the thoracolumbar spine it was possible to make a positive diagnosis and ensure follow-up. The radiographic semeiotics are characteristic and combine anterior pinching of the disc, well-delimited erosion of the anterior vertebral corners and anterior then posterior intervertebral ankylosis. MRI is very useful for assessing the extent of the intervertebral ankylosis and the condition of the residual discs, without irradiation. The condition develops over several months or years. Conservative treatment is usually sufficient.
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[Prenatal helical CT diagnosis of severe fibular hemimelia]. JOURNAL DE RADIOLOGIE 2011; 92:431-436. [PMID: 21621110 DOI: 10.1016/j.jradio.2011.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Revised: 06/05/2010] [Accepted: 03/03/2011] [Indexed: 05/30/2023]
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A study of irradiated FeCr alloys: deviations from Matthiessen's rule and interstitial migration. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0305-4608/17/5/014] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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[Equilibrium in the aged, the Troyes experience]. SOINS. GERONTOLOGIE 2000:20-1. [PMID: 11221231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Abstract
Gradient-echo MR imaging (MRI) was evaluated for the diagnosis of ovarian mature cystic teratomas (MCTs). The FLASH technique was applied to T1-weighted images with and without fat suppression in 18 surgical operated patients with 19 MCTs, and findings were compared to those of conventional spin-echo (SE) T1-weighted-SE. Seventeen out of 19 MCTs were correctly diagnosed using FLASH and SE T1-weighted MR images with and without fat saturation. This study suggests that gradient-echo MRI can replace conventional SE T1-weighted MRI for the diagnosis of ovarian MCTs.
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The Solubility of Carbon in High Purity α Iron Measured by Electrical Resistivity at 4.2 K. ACTA ACUST UNITED AC 2000. [DOI: 10.2320/matertrans1989.41.78] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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[Determination of the best diagnostic criteria of sacroiliitis with MRI]. JOURNAL DE RADIOLOGIE 1999; 80:1649-57. [PMID: 10642659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
AIM To determine which signs are the most accurate in the diagnosis of sacroiliitis with MRI. MATERIAL AND METHODS 40 consecutive patients with inflammatory low back pain underwent MRI at 1.5 T with FSE T2 and SE T1 weighted-images before and after Gadolinium-DOTA injection. 22 patients were suffering from spondylarthropathy while the other 18 patients constituted the control group. Each examination was interpreted by two independent observers who analysed 11 different signs. RESULTS Intra and inter observer reproducibility were high (respectively 76% and 70%). Inter observer reproducibility was excellent for bone marrow edema (89%) but low for bone productions (38%). Three lesions displayed a high positive predictive value: ligamentous contrast enhancement (86%), bone marrow edema (80%) and bone erosions (70%). Intra articular enhancement of the sacro-iliac joint was a less sensitive sign than bone marrow edema. CONCLUSION This study confirms the excellent positive predictive value of MRI for an early diagnosis of active sacroiliitis. Bone marrow edema seems to be a more pertinent sign than intra articular enhancement.
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Abstract
The objective of this study was to determine the utility of CT scan findings for the diagnosis of chest wall tuberculosis, excluding the spine. We reviewed 15 patients (13 Africans and 2 Indians) with chest wall tuberculosis, retrospectively. The radiologic examination consisted of a plain X-ray and a CT scan of the chest for each patient. The site of disease was the rib in 13 patients or the body of the sternum in 2 patients. One rib was involved in 11 patients, 2 contiguous ribs (one site) in 2 patients, and bilateral disease (two sites) was observed in the remaining patient. The 14 rib sites involved the posterior arc or costovertebral joint in 11 cases, the anterior arc in 2 cases, and the anterior and middle arc in 1 case. The CT scan findings were an abscess (n = 14) or a soft tissue mass (n = 2), osteolytic lesions (n = 13), periosteal reaction (n = 10), and sequestrum (n = 14). Bone sclerosis was observed only in 3 cases of rib involvement. The association of a soft tissue abscess, an osteolytic lesion, and sequestrum, especially in immigrants to France, suggests chest wall tuberculosis on CT scan.
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Blessures musculotendineuses à répétition survenant sur un terrain métabolique perturbé : à propos d'une observation de maladie de Gilbert chez un sprinter de niveau national. Sci Sports 1998. [DOI: 10.1016/s0765-1597(99)80013-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Electron dynamics in copper metallic nanoparticles probed with femtosecond optical pulses. PHYSICAL REVIEW LETTERS 1995; 75:4702-4705. [PMID: 10059976 DOI: 10.1103/physrevlett.75.4702] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
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Pitting Resistance of Pure Fe-17%Cr Alloys : Consequences for Localized Corrosion Modeling. ACTA ACUST UNITED AC 1995. [DOI: 10.1051/jp4:1995751] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Dephasing dynamics of the vibronic states of epitaxial polydiacetylene films. PHYSICAL REVIEW LETTERS 1995; 74:904-907. [PMID: 10058878 DOI: 10.1103/physrevlett.74.904] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Material transport mechanisms and activation energy in nanometric Fe powders based on sintering experiments. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0965-9773(95)00199-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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The relationship between consolidation behavior and particle size in Fe nanometric powders. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/s0956-716x(99)80003-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ultrafast phase dynamics of coherent emission from excitons in GaAs quantum wells. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:8439-8453. [PMID: 9974862 DOI: 10.1103/physrevb.50.8439] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Effects of low temperature on nitrate uptake, and xylem and phloem flows of nitrogen, in Secale cereale L. and Brassica napus L. THE NEW PHYTOLOGIST 1994; 127:675-683. [PMID: 33874379 DOI: 10.1111/j.1469-8137.1994.tb02970.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The effect of low temperature on nitrate uptake and subsequent N translocation and cycling was investigated in Secale cereale L. and Brassica napus L. transferred to 7 °C for 9 d or kept at a warm temperature (20 °C). Some plants were grown with a split root system and 15 NO3 - , labelled to measure NO3 - uptake, root-to-shoot and shoot-to-root translocation of N from NO3 - , taken up. Other plants with single-root system were subjected to 15 N pulse-chase labelling to quantify endogenous N remobilization. Lowering growth temperature from 20 to 7 °C reduced nitrate uptake more strongly in rye (-59%) than in winter rape (-28%). A very large proportion of the nitrate taken up was further translocated to shoots in both species. However, lowering the temperature decreased, xylem N translocation by about 60 and 30% in S. cereale and B. napus, respectively. Most root N in the latter species came directly from root absorption, while in rye roots the proportions ascribe able to direct root allocation and phloem flow were well balanced. Cold treatment did not significantly modify the imbalance between the two origins. Mobilization of endogenous N from roots to shoot, estimated by pulse-chase labelling, was limited in B. napus and significant in S. cereale despite a depressive effect of low temperature. In general, low temperature led to an increase in root N concentration in both species. It is Suggested that low temperature may directly affect the nitrate uptake system, and also that N accumulation in the roots (resulting from greater inhibition of N xylem flow than of NO3 - uptake) might increase the inhibition of uptake by higher cellular NO3 , and/or amino acid content. The usefulness (for spring growth) of root N accumulation triggered by low temperature is discussed.
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Femtosecond dephasing in CdSxSe1-x mixed crystals: The role of localized biexcitons. PHYSICAL REVIEW LETTERS 1993; 71:1820-1823. [PMID: 10054508 DOI: 10.1103/physrevlett.71.1820] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Instantaneous frequency dynamics of coherent wave mixing in semiconductor quantum wells. PHYSICAL REVIEW LETTERS 1993; 70:3307-3310. [PMID: 10053835 DOI: 10.1103/physrevlett.70.3307] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Collective effects in excitonic free induction decay: Do semiconductors and atoms emit coherent light in different ways? PHYSICAL REVIEW LETTERS 1992; 69:2685-2688. [PMID: 10046558 DOI: 10.1103/physrevlett.69.2685] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Two-dimensional carrier-carrier screening in a quantum well. PHYSICAL REVIEW LETTERS 1991; 67:636-639. [PMID: 10044949 DOI: 10.1103/physrevlett.67.636] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
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Non-Markovian dephasing of molecules in solution measured with three-pulse femtosecond photon echoes. PHYSICAL REVIEW LETTERS 1991; 66:1138-1141. [PMID: 10044005 DOI: 10.1103/physrevlett.66.1138] [Citation(s) in RCA: 107] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Properties of the electron-hole plasma in II-VI compounds as a function of temperature. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:11019-11027. [PMID: 9947916 DOI: 10.1103/physrevb.39.11019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Effects of the Quenching Conditions on the Relaxation Enthalpy and on the Soft Magnetic Properties of Amorphous Ribbons*. Z PHYS CHEM 1988. [DOI: 10.1524/zpch.1988.157.part_1.283] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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The influence of the substitution of metallic elements on the thermal stability and magnetic properties of amorphous FeBSi alloys. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0025-5416(88)90287-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Magnetic behaviour in amorphous TbxCu1−x alloys (x = 0.18, 0.22, 0.33, 0.50 and 0.65). ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0025-5416(88)90314-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Thermal stability of the icosahedral phase in AlMn (Mn=4−15 at.%) alloys prepared by planar flow casting. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0025-5416(88)90361-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Étude des capacités d'échange et des sélectivités cationiques de parois isolées des racines de Cochlearia anglica et de Phaseolus vulgaris cultivés sur des milieux diversement salés. ACTA ACUST UNITED AC 1986. [DOI: 10.1139/b86-128] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cochlearia anglica L. (halophyte) and Phaseolus vulgaris L. (glycophyte) were grown in media of different salinities. The root cell walls were isolated and then equilibrated with various salt solutions. There were differences between cell walls from C. anglica and P. vulgaris in both the cationic exchange capacity (computed by the sum of parietal cations) and the cell wall selectivity (evaluated by the centesimal proportion of each cation). In cell walls from plants grown without NaCl, the number of exchange sites was greater for the halophyte than for the glycophyte. Growing the plants on 42 and 85 mM NaCl medium reduced or reversed the disparities between the two species: with C. anglica, the cell wall cationic exchange capacity decreased when the growth medium salinity increased whereas this capacity tended to rise for P. vulgaris. However, the culture medium salinity did not affect the cell wall selectivity of these species for major cations. For Ca2+, the selectivity of cell walls from P. vulgaris was higher than that of cell walls from C. anglica; for the other cations, the situation was reversed.
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Determination de la solubilite du carbone dans le chrome par mesure de la resistivite electrique a basse temperature. ACTA ACUST UNITED AC 1985. [DOI: 10.1016/0001-6160(85)90208-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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