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1.
Dalton Trans ; 51(26): 9971-9977, 2022 Jul 05.
Artigo em Inglês | MEDLINE | ID: mdl-35708623

RESUMO

We report a synthetic strategy that allows for the preparation of sterically encumbered heteroleptic Ru(II)porphyrinates with the desired configuration of stable/inert and weak/labile axial ligands to direct reactions between substrates to exclusively occur at the sterically encumbered face. To demonstrate the method, we describe the synthesis of a strapped-Ru(II)porphyrinate bearing a stable/inert triphenylphosphine (PPh3) bulky axial ligand coordinated exo to the central cavity and a weak/labile methanol molecule coordinated at the internal axial position. With this axial ligand configuration, the reported Ru(II)porphyrinate exclusively promotes carbene transfer reactions to olefins through the central cavity, which has been verified by the selective formation of cycloprane-linked [2]rotaxanes.


Assuntos
Alcenos , Ligantes , Modelos Moleculares
2.
Food Technol Biotechnol ; 60(1): 21-28, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-35440885

RESUMO

Research background: Extracts from grape pomace, including the wine, show many biological effects such as antioxidant and anti-inflammatory activities. Unfortunately, winemakers discard the bagasse, so the waste is not exploited, although it contains bioactive compounds with antioxidant and anti-inflammatory properties. The work aims to analyze the hydroethanolic extract of peels from Vitis labrusca agro-industrial waste and to evaluate its antinociceptive and anti-inflammatory properties. This study is relevant for reusing a residue and adding value to the grape economic chain. Experimental approach: A representative sample of pomace was obtained and the peels were used to produce the extract. The phenolic compounds were determined by mass spectrometry in multiple reaction monitoring mode and Folin-Ciocalteu colorimetric method, using gallic acid as standard. The biological analyses were carried out using mice orally treated with crude extract at doses of 30, 100 and 300 mg/kg. We evaluated mechanical hyperalgesia by the von Frey method, thermal heat hyperalgesia using a hot plate at 55 °C, paw edema using a pachymeter, and neutrophil recruitment by measurement of myeloperoxidase activity. The nephrotoxicity and hepatotoxicity were evaluated by biochemical analyses using blood samples that were collected after the Vitis labrusca administration. Results and conclusions: In all wet winemaking residues peel mass fraction was 75%, and in dry residues 59%. We identified nine anthocyanins (3-O-glucosides: peonidin, delphinidin, petunidin and malvidin; 3-p-coumaroyl-glucosides: cyanidin, peonidin, petunidin and malvidin, and malvidin-3,5-diglucoside), five flavonoids (apigenin-7-glucoside, luteolin-7-glucoside, quercetin-3-galactoside, isorhamnetin-3-glucoside and myricetin-3-rutinoside), and mass fraction of phenolic compounds, expressed as gallic acid equivalents, was 26.62 mg/g. In vivo assays showed that Vitis labrusca extract at mass fractions 100 and 300 mg/kg reduced carrageenan-induced mechanical and thermal hyperalgesia, 50% of the paw edema, and neutrophil recruitment. In addition, there were no indications of nephrotoxicity and hepatotoxicity. Our extract obtained from winemaking residue has analgesic and anti-inflammatory properties, related at least in part to the presence of phenolic compounds, and it is not toxic to renal and hepatic tissues. Novelty and scientific contribution: This bio-product can be used as an alternative to synthetic anti-inflammatory agents with the same pharmacological potential and fewer side effects. We demonstrated that Vitis labrusca winemaking waste can be used for the production of antinociceptive and anti-inflammatory products (nutraceutical, pharmaceutical and cosmetics) without toxicity, contributing to the environmental economy.

3.
Bioorg Med Chem Lett ; 48: 128240, 2021 09 15.
Artigo em Inglês | MEDLINE | ID: mdl-34217828

RESUMO

A simple and fast methodology under microwave irradiation for the synthesis of 2-aminopyrimidine and pyrazole derivatives using Atwal reaction is reported. After the optimization of the reaction conditions, eight 2-aminolpyrimidines containing ferrocene and heterocycles and three ferrocene pyrazoles were synthesized from the respective chalcones in good yields. Eight compounds had their structure determined by X-ray diffraction. The molecular hybrid 6a-h and 9a-c were tested on four cancer cell lines - HCT116, PC3, HL60 and SNB19 - where four pyrimidine 6a, 6f-h and one pyrazole 9c derivatives show promising antiproliferative activity. In addition, docking simulation and machine learning methods were carried out to explain the biological activity achieved by the synthetized compounds.


Assuntos
Antineoplásicos/farmacologia , Compostos Ferrosos/farmacologia , Aprendizado de Máquina , Metalocenos/farmacologia , Micro-Ondas , Simulação de Acoplamento Molecular , Pirazóis/farmacologia , Pirimidinas/farmacologia , Antineoplásicos/síntese química , Antineoplásicos/química , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Compostos Ferrosos/síntese química , Compostos Ferrosos/química , Humanos , Metalocenos/síntese química , Metalocenos/química , Estrutura Molecular , Pirazóis/síntese química , Pirazóis/química , Pirimidinas/síntese química , Pirimidinas/química , Relação Estrutura-Atividade
4.
Nat Commun ; 11(1): 6370, 2020 12 11.
Artigo em Inglês | MEDLINE | ID: mdl-33311502

RESUMO

Selectivity in N-H and S-H carbene insertion reactions promoted by Ru(II)porphyrinates currently requires slow addition of the diazo precursor and large excess of the primary amine and thiol substrates in the reaction medium. Such conditions are necessary to avoid the undesirable carbene coupling and/or multiple carbene insertions. Here, the authors demonstrate that the synergy between the steric shielding provided by a Ru(II)porphyrinate-based macrocycle with a relatively small central cavity and the kinetic stabilization of otherwise labile coordinative bonds, warranted by formation of the mechanical bond, enables single carbene insertions to occur with quantitative efficiency and perfect selectivity even in the presence of a large excess of the diazo precursor and stoichiometric amounts of the primary amine and thiol substrates. As the Ru(II)porphyrinate-based macrocycle bears a confining nanospace and alters the product distribution of the carbene insertion reactions when compared to that of its acyclic version, the former therefore functions as a nanoreactor.

5.
Chemistry ; 26(35): 7808-7822, 2020 Jun 23.
Artigo em Inglês | MEDLINE | ID: mdl-32022364

RESUMO

A 5,15-bis(1,1'-biphenyl)porphyrin-based molecular clip covalently connected to a ditopic aliphatic ester loop moiety yields a semi-rigid macrocycle with a well-defined cavity. The resulting macrocycle fits the structural requirements for the preparation of porphyrinates capable of promoting formation of C-C bonds. To demonstrate the usefulness of porphyrin-based macrocycles, an active-metal-template synthesis of rotaxanes through a redox non-innocent carbene transfer reaction is described. Coordination of CoII ions into the porphyrin subunit followed by addition of appropriate monodentate nitrogen-based additives to function as axial ligands enables the radical carbene transfer reactions to styrene derivatives to occur exclusively through the cavity of the macrocycle to afford cyclopropane-linked rotaxanes in excellent 95 % yield. Investigation of the product distribution afforded from the rotaxane assembly reaction reveals how the redox cooperative action between the carbene species and the CoII ions can be manipulated to gain control over the radical-type mechanism to favor the productive rotaxane forming process.

6.
Angew Chem Int Ed Engl ; 57(29): 8979-8983, 2018 Jul 16.
Artigo em Inglês | MEDLINE | ID: mdl-29847693

RESUMO

A CoII /porphyrinate-based macrocycle in the presence of a 3,5-diphenylpyridine axial ligand functions as an endotopic ligand to direct the assembly of [2]rotaxanes from diazo and styrene half-threads, by radical-carbene-transfer reactions, in excellent 95 % yield. The method reported herein applies the active-metal-template strategy to include radical-type activation of ligands by the metal-template ion during the organometallic process which ultimately yields the mechanical bond. A careful quantitative analysis of the product distribution afforded from the rotaxane self-assembly reaction shows that the CoII /porphyrinate subunit is still active after formation of the mechanical bond and, upon coordination of an additional diazo half-thread derivative, promotes a novel intercomponent C-H insertion reaction to yield a new rotaxane-like species. This unexpected intercomponent C-H insertion illustrates the distinct reactivity brought to the CoII /porphyrinate catalyst by the mechanical bond.

7.
Talanta ; 174: 581-586, 2017 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-28738625

RESUMO

It is highly desirable to screen for a large variety of organic compounds in water. Ultra-high performance liquid chromatography coupled to high-resolution mass spectrometry (UHPLC-HRMS) can analyse semi-polar to polar organic compounds in tap and mineral water. The use of UHPLC-HRMS is well consolidated for lipidomic, metabolomic and proteomic studies; based on the detection of a very large number of compounds of a variety of organic functions. Water analysis is usually performed by gas chromatography -mass spectrometry (GC-MS) techniques that are efficient for volatile organic compounds. Therefore the use of UHPLC-HRMS as a screening method based on an untargeted omic approach for the analysis of organic compounds with polar functional groups is welcome. This UHPLC-HRMS method was developed and tested with tap water and mineral water. We analysed six different brands of mineral water from France, Spain, Norway and Brazil and tap water from Jandaia do Sul, PR, Brazil to test the approach and demonstrate how UHPLC-HRMS may be used as a screening method for water quality. Forty-seven different ions were observed in tap and mineral water and their intensities were submitted to principal component analysis (PCA) evaluation. Fifteen ions were identified comparing the mass spectrometric results to metabolomic and lipidomic libraries.

8.
J Nat Prod ; 79(4): 792-8, 2016 Apr 22.
Artigo em Inglês | MEDLINE | ID: mdl-27043314

RESUMO

Chemical investigation of the tubers of Sinningia allagophylla led to the isolation of two new chromenes, (2S)-12-hydroxylapachenole (1) and (3R)-3,4-dihydro-3-hydroxy-4-oxo-8-methoxylapachenole (2), and three new dimeric chromenes, allagophylldimers A-C (3-5). Thirteen known compounds, 6-methoxy-7,8-benzocoumarin (6), lapachenole, 8-methoxylapachenole, tectoquinone, 7-hydroxytectoquinone, dunniol, α-dunnione, dunnione, 8-hydroxydunnione, aggregatin E, cedrol, oleanolic acid, and halleridone, were also identified. 6-Methoxy-7,8-benzocoumarin (6) has been isolated for the first time from a natural source.


Assuntos
Benzopiranos/isolamento & purificação , Naftalenos/isolamento & purificação , Tubérculos/química , Plantas Medicinais/química , Benzofuranos/química , Benzofuranos/isolamento & purificação , Benzopiranos/química , Brasil , Cicloexanonas/química , Cicloexanonas/isolamento & purificação , Estrutura Molecular , Naftalenos/química , Naftoquinonas/química , Naftoquinonas/isolamento & purificação , Sesquiterpenos Policíclicos , Terpenos/química , Terpenos/isolamento & purificação
9.
Dalton Trans ; 45(1): 172-89, 2016 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-26585631

RESUMO

A novel series of copper(II) coordination polymers [Cu2(O2CC8H9)4(pyz)]n (1), [Cu2(O2CC8H9)4(dps)]n (2), {[Cu(O2CC8H9)2(dps)(H2O)]·H2O}n (3), {[NaCu(O2CC8H9)2(bpm)(NO3)]·H2O}n (4), and [Cu4(O2CC8H9)6(OH)2(bpp)2]n (5) [O2CC8H9− = 3-phenylpropionate anion, pyz = pyrazine, dps = di(4-pyridyl)sulfide, bpm = 2,2'-bipyrimidine, and bpp = 1,3-bis(4-pyridyl)propane] have been synthesized and magneto-structurally investigated. Compounds 1 and 2 belong to a large group of copper(II) carboxylates where bis-monodentate pyz (1) and dps (2) ligands connect the paddle-wheel [CuII2(µ-O2CC8H9)4] units leading to alternating copper(II) chains. The structure of 3 consists of uniform chains of trans-[CuII(O2CC8H9)2] units linked by the bis-monodentate dps ligand. Compound 4 consists of heterobimetallic chains where [NaI2CuII2(µ-O2CC8H9)4(NO3)2] units are doubly bridged by bis-bidentate bpm ligands. Compound 5 is also a chain compound whose structure is made up by tetranuclear [CuII4(µ3-OH)2(µ-O2CC8H9)4(O2CC8H9)2] units which are doubly bridged by bis-monodentate bpp ligands. The magnetic properties were investigated in the temperature range 1.8­300 K. Strong antiferromagnetic interactions across the quadruple syn­syn carboxylate are observed in 1 and 2 [J = −378 (1) and −348 cm−1 (2)] whereas a weak ferromagnetic coupling through the double out-of-plane oxo(carboxylate) bridge occurs in 4 [J = +2.66 cm−1], the spin Hamiltonian being defined as H = −JS1·S2 with S1 = S2 = SCu = 1/2. A quasi Curie law is observed for 3 (θ = −0.36 cm−1), the bis-monodentate dps ligand being a very poor mediator of magnetic interactions. The analysis of the magnetic properties of 5 is quite complex because of the presence of two crystallographically independent tetracopper(II) units with single-µ-hydroxo, di-µ-hydroxo, µ3-hydroxo and single-µ-hydroxo plus double syn,syn carboxylate bridges in each one. The nature and values of the magnetic couplings for 5 obtained by fitting (intermediate, strong and weak antiferromagnetic interactions for the three former exchange pathways respectively, and intermediate ferromagnetic interactions for the latter one) were substantiated by DFT type calculations.

10.
J Colloid Interface Sci ; 450: 339-352, 2015 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-25841060

RESUMO

Synthetic strategies that comply with the principles of green chemistry represent a challenge: they will enable chemists to conduct reactions that maximize the yield of products with commercial interest while minimizing by-products formation. The search for catalysts that promote the selective oxidation of organic compounds under mild and environmentally friendly conditions constitutes one of the most important quests of organic chemistry. In this context, metalloporphyrins and analogues are excellent catalysts for oxidative transformations under mild conditions. In fact, their reduced derivatives chlorins are also able to catalyze organic compounds oxidation effectively, although they have been still little explored. In this study, we synthesized two chlorins through porphyrin cycloaddition reactions with 1.3-dipoles and prepared the corresponding manganese chlorins (MnCHL) using adequate manganese(II) salts. These MnCHL were posteriorly immobilized on silica by following the sol-gel process and the resulting solids were characterized by powder X-ray diffraction (PXRD), UVVIS spectroscopy, FTIR, XPS, and EDS. The catalytic activity of the immobilized MnCHL was investigated in the oxidation of cyclooctene, cyclohexene and cyclohexane and the results were compared with the ones obtained under homogeneous conditions.

11.
Biomed Res Int ; 2015: 143504, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25688350

RESUMO

Human adipose-derived stem cells (hASCs) are an attractive cell source for therapeutic applicability in diverse fields for the repair and regeneration of damaged or malfunctioning tissues and organs. There is a growing number of cell therapies using stem cells due to their characteristics of modulation of immune system and reduction of acute rejection. So a challenge in stem cells therapy is the delivery of cells to the organ of interest, a specific site. The aim of this paper was to investigate the effects of a supramolecular assembly composed of single-walled carbon nanotubes (SWCNT), molecular magnets (lawsone-Co-phenanthroline), and a synthetic peptide (FWYANHYWFHNAFWYANHYWFHNA) in the hASCs cultures. The hASCs were isolated, characterized, expanded, and cultured with the SWCNT supramolecular assembly (SWCNT-MA). The assembly developed did not impair the cell characteristics, viability, or proliferation. During growth, the cells were strongly attached to the assembly and they could be dragged by an applied magnetic field of less than 0.3 T. These assemblies were narrower than their related allotropic forms, that is, multiwalled carbon nanotubes, and they could therefore be used to guide cells through thin blood capillaries within the human body. This strategy seems to be useful as noninvasive and nontoxic stem cells delivery/guidance and tracking during cell therapy.


Assuntos
Imãs/química , Células-Tronco Mesenquimais/citologia , Células-Tronco Mesenquimais/fisiologia , Nanotubos de Carbono/química , Peptídeos/química , Tecido Adiposo/citologia , Separação Celular/métodos , Sobrevivência Celular/efeitos dos fármacos , Células Cultivadas , Humanos , Transplante de Células-Tronco Mesenquimais , Nanotubos de Carbono/toxicidade , Naftoquinonas/química , Fenantrolinas/química
12.
Chem Commun (Camb) ; 49(92): 10778-80, 2013 Nov 28.
Artigo em Inglês | MEDLINE | ID: mdl-24052000

RESUMO

A unique bistable copper-metallacyclic complex is used as an elegant molecular switch for the reversible formation of emulsions by simple pH variation. This switch may have several exciting applications in biphasic processes such as catalysis and separation science technologies.

13.
Inorg Chem ; 52(15): 8812-9, 2013 Aug 05.
Artigo em Inglês | MEDLINE | ID: mdl-23855768

RESUMO

A new compound of formula (Bu4N)2[Mn2{Cu(opba)}2ox] (1) [Bu4N(+) = tetra-n-butylammonium cation, H4opba = 1,2-phenylenebis(oxamic acid), and H2ox = oxalic acid] has been synthesized and magneto-structurally investigated. The reaction of manganese(II) acetate, [Cu(opba)](2-), and ox(2-) in dimethyl sulfoxide yielded single crystals of 1. The structure of 1 consists of heterobimetallic oxamato-bridged Cu(II)Mn(II) chains which are connected through bis-bidentate oxalate coordinated to the manganese(II) ions to afford anionic heterobimetallic layers of 6(3)-hcb net topology. The layers are interleaved by n-Bu4N(+) counterions. Each copper(II) ion in 1 is four-coordinate in a square planar environment defined by two amidate-nitrogen and two carboxylate-oxygen atoms from the two oxamate groups of the obpa ligand. The manganese(II) ion is six-coordinate in a somewhat distorted octahedral surrounding that is built by two oxalate-oxygen and four carbonyl-oxygen atoms from two [Cu(opba)](2-) units. The magnetic properties of 1 in the temperature range 1.9-300 K correspond to those expected for the coexistence of intralayer antiferromagnetic interactions of the type copper(II)-manganese(II) across oxamato and manganese(II)-manganese(II) through oxalato bridges plus a weak spin canting in the very low temperature domain. Simulation of the magnetic data through quantum Monte Carlo methodology reveals the magnitude of the intralayer magnetic interactions [J(CuMn) = -32.5(3) cm(-1), and J(MnMn) = -2.7(3) cm(-1)], their values being within the range of those previously observed in lower nuclearity systems.

14.
Dalton Trans ; 42(16): 5778-95, 2013 Apr 28.
Artigo em Inglês | MEDLINE | ID: mdl-23450253

RESUMO

We herein present the synthesis and X-ray structures of five copper(II) complexes of formulae [Cu(bpca)(CF3SO3)(H2O)]·H2O (1), [Cu(bpca)(Phpr)(H2O)]·3/2H2O (2), {[Cu(bpca)]2[Cu(opba)(H2O)]}·H2O (3), {[Cu(bpca)]2(H2opba)}2·6H2O (4) and [Cu(bpca)(EtH2opba)]n (5), where bpca = bis(2-pyridylcarbonyl)amidate, Phpr = 3-phenylpropionate, CF3SO3(−) = triflate (anion of the trifluoromethanesulphonic acid), H4opba = N,N'-1,2-phenylenebis(oxamic acid), and EtH3opba = monoethyl ester derivative of the H4opba. 1 and 2 are mononuclear copper(II) complexes where the copper atom is five-coordinate in distorted square pyramidal surroundings with a tridentate bpca and a water molecule (1)/carboxylate oxygen (2) building the basal plane and a triflate oxygen (1)/water molecule (2) filling the apical position. 3 is a neutral tricopper(II) complex where the [Cu(opba)(H2O)]2− unit acts as a bis-bidentate ligand toward two peripheral [Cu(bpca)]+ fragments. The three crystallographically independent copper(II) ions in 3 are five-coordinate with two nitrogen and two oxygen atoms (inner copper atom)/three bpca-nitrogen and an oxamate oxygen (outer copper atom) building the basal plane plus a water molecule (inner copper)/an oxamate oxygen (outer copper) in the apical position (inner copper atom) of somewhat distorted square pyramidal surroundings. 4 is a centrosymmetric tetracopper(II) compound where four [Cu(bpca)]+ fragments are assembled by two H2opba2− groups adopting an unusual bidentate/bis-monodentate bridging mode. The two crystallographically independent copper(II) ions in 4 are also five-coordinate having the three bpca-nitrogens in basal positions, the other two sites of the distorted square pyramid being filled by two oxygens of either a bidentate oxamate (at one copper centre) or two bis-monodentate oxamates (at the other copper atom). 5 is a zigzag chain of [Cu(bpca)(H2O)]+ units which are connected through the EtH2opba− ligand adopting a bidentate/monodentate bridging mode across the monodeprotonated oxamate group. Each copper(II) ion in 5 is six-coordinate in an elongated octahedral CuN3O3 chromophore. The magnetic properties of 3­5 were investigated in the temperature range 1.9­300 K. 3 exhibits an intermediate intramolecular antiferromagnetic interaction [J = -65.8(2) cm(-1) with the Hamiltonian H = -J(S(Cu1)·S(Cu2) + S(Cu2)·S(Cu3))] which leads to a low-lying spin doublet at low temperatures. A weak antiferromagnetic coupling between the inner copper(II) ions occurs in 4 [J = -2.36(2) cm(-1), H = -JS1·S2)] and a very small intrachain antiferromagnetic interaction is observed in 5 [J = -0.17(1) cm(-1) with H = -J∑(i)S(i)·S(i+1)]. These values are analyzed by means of simple orbital symmetry considerations and compared with those previously reported for parent systems.

15.
Dalton Trans ; 42(15): 5462-70, 2013 Apr 21.
Artigo em Inglês | MEDLINE | ID: mdl-23423385

RESUMO

Bi-stable molecular systems presenting valence tautomerism are associated with the development of new functional materials, which can be used for applications in organic electric conductors, optoelectronic and molecular magnetic devices. The properties of these materials can be adjusted with slight chemical changes and can be induced by external stimuli. Typical examples of valence tautomer compounds are coordination complexes of Co and o-dioxolene ligands, notably quinone like ones. In the search for a new class of cobalt complexes presenting valence tautomerism we report herein the synthesis and characterization of five new coordination compounds of cobalt and 2-hydroxy-1,4-naphthoquinone (lawsone or shortly Law). Complexes [Co(Law)2(im)2]·C6H5CH3 (1), [Co(Law)2(py)2]·CH3OH (2), [Co(Law)2(phen)]·(C4H8O)2 (3), [Co(Law)2(2,2-bpy)]·C6H5CH3 (4) and [Co(Law)2(2,2-bpy)] (5) were synthesized and fully characterized by X-ray diffraction and EPR techniques in a wide range of temperatures and under illumination. Despite presenting similar molecular and geometry packing of the valence tautomer complexes of cobalt and o-dioxolenes, neither structural nor electronic evidence of valence tautomerism could be found in the Co and lawsone complexes.

16.
ROBRAC ; 19(48)abr. 2010. ilus
Artigo em Português | LILACS | ID: lil-558318

RESUMO

A estética do sorriso pode ser alcançada pela comunhão de fatores como a anatomia dentária, a gengival, facial e a estrutura corpórea do paciente. Um sorriso harmônico é construído baseado nestes aspectos, e não somente na reabilitação dentária, mas observando cada um desses fatores, em busca da excelência do sorriso. O propósito deste trabalho foi relatar o caso de uma paciente que apresentou relação desarmônica entre o status gengival e o comprimento curto das coroas clínicas dos dentes ântero-superiores e ântero-inferiores, causada ainda pela discrepância entre os componentes facial e estrutura corpórea. Foram discutidas as vantagens, desvantagens, benefícios, indicações, contra-indicações, descrição da técnica da cirurgia gengival ressectiva (gengivoplastia) e a observação da relação de harmonia entre as estéticas dentária e gengival. A cirurgia ressectiva gengival é um procedimento eficaz coadjuvante na adequação gengival em relação à estética dentária, visando não apenas o resultado estético satisfatório, como também a manutenção do periodonto saudável.


The smile esthetic can be reached by joining factors such as dental, gingival and facial anatomy, and the body structure from the patient. A harmonious smile is built based on these aspects, and not only in dental rehabilitation. We should observe each on them, in search for the best smile. The purpose of this article is to report a case, which the patient presented disharmonic proportion between gingival status and short length of clinic crowns of the anterior maxillary teeth and inferior mandibular teeth, also caused by discrepancy between facial components and body structure. The advantages, disadvantages, benefits, indications, contraindications, description of the gingival resective surgery technique (gingivectomy) and the observation of the harmonic proportion between dental and gingival esthetics were discussed. Resective gingival surgery is a coadjuvant effective procedure for the gingival condition in reference to the dental esthetic, aiming not only satisfactory esthetic results, but also maintain the periodontal healthy.

17.
Rev. bras. ciênc. mov ; 13(2): 161-170, 2005. tab, graf
Artigo em Português | LILACS | ID: lil-524816

RESUMO

As alterações no metabolismo dos lipídeos são uma das conseqüências negativas mais importantes do sedentarismo. O propósito deste artigo é rever os estudos mais significantes que analisaram a relação entre atividade/inatividade física no perfil lipídico. Considerando a ineficácia das intervenções anteriores que procuraram usar atividade física na prevenção e tratamento, especial atenção foi dedicada à informação científica que levou em conta práticas modernas, particularmente as que permitam uma maior aderência, essencial em programas de saúde pública. A revisão presente aborda as causas e os efeitos deletérios do sedentarismo na mobilização de lipídeos, o papel da atividade física moderada e acumulada, a eficácia de propostas de estilo de vida ativo, comparação de efeitos entre programas de condicionamento (fitness) com os estilo de vida (atividade física), as recomendações preventivas e terapêuticas, assim como recentes aspectos da relação entre dislipidemias e declínio na função cognitiva. Os estudos aqui sumarizados apontam que programas de atividade física são fundamentais na prevenção e no tratamento das dislipidemias, sendo que as evidências científicas do impacto positivo dos protocolos inclusivos de atividade física, que enfatizam as vantagens da intensidade moderada e da forma acumulada, podem em muito beneficiar a adesão e manutenção de pessoas em padrões regulares de atividade.


Changes in lipides metabolism has been one of the utmost negative consequences of sedentariness. The purpose of this paper was to review the most significant studies that have analyzed the relationship of physical activity/inactivity and lipids profiling. Considering the ineffective impact of former interventions in promoting physical activity as prevention or treatment tool, special attention was dedicated to the scientific information that took into account modern practices, particularly the ones which permitted a higher long term adherence, essential for public health programs. Present review comprised the harmful effects of sedentarism, the role of moderate physical activity, the role of accumulation approach, the effectiveness of active life style, comparing fitness to active living programs, the recommendations for prevention and treatment; and recent issues on the relationship between dislipidemias and declining in cognitive function. Summary of the review articles confirms that physical activity programs are fundamental in dislipidemia prevention and treatment. Scientific evidences showed the positive impact of inclusive physical activity protocols, particularly when emphasizing the advantages of moderate intensity and accumulated mode, increasing adherence and sustained physical activity.


Assuntos
Humanos , Masculino , Feminino , Colesterol , Exercício Físico , Lipídeos/fisiologia , Atividade Motora
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