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Modeling Reactivity of Nitrite and Nitrous Acid at a Phenolate Bridged Dizinc(II) Site: Insights into NO Signaling at Zinc. Chemistry 2023; 29:e202301409. [PMID: 37492966 DOI: 10.1002/chem.202301409] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 07/25/2023] [Accepted: 07/26/2023] [Indexed: 07/27/2023]
Abstract
Although nitrite-to-NO transformation at various transition metals including Fe and Cu are relatively well explored, examples of such a reaction at the redox-inactive zinc(II) site are limited. The present report aims to gain insights into the reactivity of nitrite anions, nitrous acid (HONO), and organonitrite (RONO) at a dizinc(II) site. A phenolate-bridged dizinc(II)-aqua complex [LH ZnII (OH2 )]2 (ClO4 )2 (1H -Aq, where LH =tridentate N,N,O-donor monoanionic ligand) is illustrated to react with t BuONO to provide a metastable arene-nitrosonium charge-transfer complex 2H . UV-vis, FTIR, multinuclear NMR, and elemental analyses suggests the presence of a 2 : 1 arene-nitrosonium moiety. Furthermore, the reactivity of a structurally characterized zinc(II)-nitrite complex [LH ZnII (ONO)]2 (1H -ONO) with a proton-source demonstrates HONO reactivity at the dizinc(II) site. Reactivity of both RONO (R=alkyl/H) at the phenolate-bridged dizinc(II) site provides NO+ charge-transfer complex 2H . Subsequently, the reactions of 2H with exogenous reductants (such as ferrocene, thiol, phenol, and catechol) have been illustrated to generate NO. In addition, NO yielding reactivity of [LH ZnII (ONO)]2 (1H -ONO) in the presence of the above-mentioned reductants have been compared with the reactions of complex 2H . Thus, this report sheds light on the transformations of NO2 - /RONO (R=alkyl/H) to NO/NO+ at the redox-inactive zinc(II) coordination motif.
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Synthesis and structural characterization of unsymmetrical Schiff base 2-(1-(2-aminophenylimino)ethyl)phenol (LH3) and its Pd(II) complex [Pd3(LH)3]: catalysis of Suzuki–Miyaura cross-coupling reaction. J CHEM SCI 2023. [DOI: 10.1007/s12039-023-02142-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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NO x- anion recognition by bimetallic cryptates: selectivity for nitrite over nitrate. Dalton Trans 2019; 48:7085-7089. [PMID: 30758367 DOI: 10.1039/c8dt04971h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Nitrate and nitrite anions have multifaceted impacts on the environment and human health. We herein report selective recognition of nitrite over nitrate anion inside the cavity of bimetallic azacryptates having p-xylyl spacers. This work reveals a number of binding interactions which play pivotal roles in nitrite anion recognition by rigid metal cryptates.
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13DOES THE IMPLEMENTATION OF A DELIRIUM CHECKLIST IMPROVE THE ASSESSMENT OF DELIRIUM IN OLDER PEOPLE? Age Ageing 2017. [DOI: 10.1093/ageing/afx055.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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8
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Synthesis and structural characterization of a vanadium(V)-pyridylbenzimidazole complex: DNA binding and anticancer activity. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.01.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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60 * CARE HOME EDUCATION PROGRAMME--MECHANISM FOR SUSTAINING IN THE FACE OF AUSTERITY. Age Ageing 2014. [DOI: 10.1093/ageing/afu036.60] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Nomimmune hydrops fetalis due to Diamond-Blackfan anemia. Indian Pediatr 2004; 41:187-8. [PMID: 15004307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
We describe case report of a baby with Diamond-Blackfan anemia, who presented as non-immune hydrops fetalis. The diagnosis was confirmed by measurement of red cell adenosine deaminase activity which is increased in Diamond-Blackfan anemia. At 2 years of age he is dependent on small dose of alternate day steroid to maintain his hemoglobin.
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11
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Theoretical study of solvent modulation of the first hyperpolarizability of PNA, DNBT and DCH. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0166-1280(01)00393-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Abstract
Small-angle neutron diffraction was used to image the mixed state in a large superconducting YBa2Cu3O7−δ single crystal. The flux line lattice was observed in fields up to 2 T at various temperatures from 2.4 to 80 K. The integrated intensity I of the (10) reflection was calculated as a function of temperature for three different fields (0.8, 1 and 2 T). From these I(T) curves, the magnetic penetration depth λ(T) was obtained on an absolute scale. This quantity is of particular interest, since it provides information on the nature of the pairing mechanism in the superconductor, i.e. the symmetry of the wavefunction of the electron pairs. The results are discussed in terms of BCS theory (s-wave pairing) and of d-wave pairing with and without impurity scattering.
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Further biochemical and biophysical characterisation of scyllin, Scylla serrata hemolymph lectin. BIOCHEMISTRY AND MOLECULAR BIOLOGY INTERNATIONAL 1997; 42:183-91. [PMID: 9192099 DOI: 10.1080/15216549700202571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The amino acid and carbohydrate analysis of scyllin, a low molecular weight lectin purified from Scylla serrata (edible crab) haemolymph reveal that scyllin is rich in acidic and neutral amino acids and contains high amount of mannose. UV absorption of scyllin is perturbed by DMSO at 272 nm showing the presence of tryptophan molecule in scyllin exposed and accessible to the solvent. The oxidation of tryptophan molecule by N-bromosuccinimide results in loss of haemagglutinating activity of lectin. The study of thermodynamic parameters of scyllin-glycoproteins interaction suggests that ceruloplasmin is the most potent inhibitors of scyllin of all the glycoproteins studied.
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Inhibition of bacterial respiration by a low-molecular weight lectin, scyllin, from Scylla serrata crab hemolymph. INDIAN JOURNAL OF BIOCHEMISTRY & BIOPHYSICS 1997; 34:87-9. [PMID: 9343934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Interaction of plant and/or invertebrate lectins with mammalian cells and different microorganisms is well known. In the present study, we have demonstrated that scyllin, a low molecular weight (MW 4000) lectin from the edible crab Scylla serrata hemolymph, purified by GalNAc-Sepharon affinity column followed by Mono-Q ion exchanger in FPLC exhibits antimicrobial activity against Bacillus cereus and Escherichia coli by inhibiting endogenous respiration as well as exogenous glucose oxidation. In both the cases oxygen consumption has been measured in an oxygraph. Scyllin has produced 50% inhibition of endogenous respiration at a concentration of 110 micrograms/ml and 125 micrograms/ml in B. cereus and E. coli respectively. It also reduced the exogenous glucose oxidation by 50% at a concentration of 12 micrograms/ml and 80 micrograms/ml respectively in B. cereus and E. coli. From the above study the mechanism of bacterial growth inhibitory property of scyllin is suggested though the other studies such as inhibition of nucleic acid biosynthesis, cell wall biosynthesis etc. to evaluate its total mode of inhibitory action are not yet obtained.
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Magnetic structure and spin dynamics of the Pr and Cu in Pr2CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:5824-5839. [PMID: 9979494 DOI: 10.1103/physrevb.51.5824] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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17
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High-pressure neutron and magnetization investigations of the magnetic ordering in CeSb. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:15096-15104. [PMID: 10010616 DOI: 10.1103/physrevb.49.15096] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Abstract
Neutron scattering has played a key role in the microscopic understanding of the static and dynamic properties of magnetic materials. Modulated magnetic structures first discovered in the late fifties can no longer be referred to as exotic; more than a hundred such phases have already been found in a variety of magnetic systems. Neutron and x-ray magnetic scattering have played a complementary role in the recent discovery and understanding of the modulated magnetic phases in rare earth metallic systems.
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Origin of the weak ferromagnetism in Gd2CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:12979-12984. [PMID: 10007673 DOI: 10.1103/physrevb.48.12979] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Magnetic phase transitions in Gd2CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:9486-9491. [PMID: 9998931 DOI: 10.1103/physrevb.44.9486] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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24
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Spin correlation in the frustrated antiferromagnet MnS2 above the Néel temperature. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:7394-7402. [PMID: 9998652 DOI: 10.1103/physrevb.44.7394] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Neutron-diffraction study of the pressure-temperature phase diagram of EuAs3. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:4358-4367. [PMID: 9994260 DOI: 10.1103/physrevb.41.4358] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Therapeutic outcome of elderly and nonelderly patients receiving home intravenous antimicrobial therapy. AMERICAN JOURNAL OF HOSPITAL PHARMACY 1990; 47:335-9. [PMID: 2309722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The therapeutic outcomes of elderly patients receiving home i.v. antimicrobial therapy were compared with those of younger patients receiving the same therapy. Using predetermined inclusion and exclusion criteria, 150 consecutively referred patients were accepted into the study. These patients were receiving home i.v. antimicrobial therapy from three home-health-care pharmacies (HHCPs). Referred patients were classified as elderly (greater than or equal to 62 years old) or nonelderly. Data for these patients were compiled retrospectively using interviews and chart reviews. Outcome of the i.v. antimicrobial therapy was rated as either adequate or inadequate based on predetermined criteria. Outcomes were analyzed for each HHCP and for the pooled data. The mean age of the pooled nonelderly group was 38 +/- 14 years, and the mean age of the pooled elderly group was 71 +/- 6 years. Adequate outcomes were noted in 70% of the pooled samples of elderly patients and 76% of the pooled samples of nonelderly patients. The difference between the outcomes of patients in the two age groups was not significant. In this carefully selected population, elderly and nonelderly patients receiving home i.v. antimicrobial therapy had similar therapeutic outcomes.
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Single-crystal neutron-diffraction investigation of the magnetic ordering of the high-temperature superconductor ErBa2Cu3O7- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:2624-2626. [PMID: 9992171 DOI: 10.1103/physrevb.40.2624] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Neutron diffraction study of the magnetic (H,T) phase diagrams of EuAs3 and Eu(As1-xPx)3. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:350-360. [PMID: 9945198 DOI: 10.1103/physrevb.38.350] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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31
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Evidence for the dependence of the magnetic ordering on the oxygen occupancy in the high-Tc superconductor GdBa2Cu. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:838-840. [PMID: 9945272 DOI: 10.1103/physrevb.38.838] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Field-induced transverse-sine-wave-to-longitudinal-sine-wave transition in EuAs3. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:795-797. [PMID: 9945258 DOI: 10.1103/physrevb.38.795] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Neutron-diffraction study of the magnetic ordering in EuAs3, Eu(As1-xPx)3, and beta -EuP3. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:269-282. [PMID: 9943572 DOI: 10.1103/physrevb.37.269] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Sine-wave-to-helimagnetic transition in phosphorus-rich Eu(As1-xPx. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 36:7300-7302. [PMID: 9942490 DOI: 10.1103/physrevb.36.7300] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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35
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New high-pressure spiral phase of EuAs3. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 36:2454-2456. [PMID: 9943128 DOI: 10.1103/physrevb.36.2454] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Incommensurate magnetic phase in EuAs3 with zone-boundary lock-in. PHYSICAL REVIEW LETTERS 1986; 57:372-375. [PMID: 10034043 DOI: 10.1103/physrevlett.57.372] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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High pressure X-ray diffraction study on the structural phase transitions in PbS, PbSe and PbTe with synchrotron radiation. ACTA ACUST UNITED AC 1986. [DOI: 10.1016/0378-4363(86)90598-x] [Citation(s) in RCA: 92] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Neutron and X-ray diffraction study of the crystal structure of SiP 2. Acta Crystallogr A 1981. [DOI: 10.1107/s0108767381095639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Cytosol and nuclear estradiol receptors in normal and cancerous breast tissue of women. Indian J Med Res 1978; 68:97-106. [PMID: 700857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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X-ray studies on Debye characteristic temperatures of disordered binary substitutional alloys. ACTA ACUST UNITED AC 1972. [DOI: 10.1107/s0567739472000385] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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