ABSTRACT
Abstract The native stands of 'candeia' (Eremanthus erythropappus) have been explored through management plans due to the economic potential of essential oil. The rescue of adult trees, as well as the application of silvicultural techniques that favor the restoration of the stand, can contribute to the genetic conservation of this species. This study's objective was to assess the efficiency of propagation techniques for the rescue of 26 matrices of 'candeia' in a natural managed stand and discussion about the rhizogenesis. In August 2017, trees were induced to regrowth by coppice, followed by exposure and scarification of roots. The emergence of shoots and morphology were evaluated according to the origin (i.e., stump or root). After that period, 19 matrices had their sprouts collected for the preparation of apical cuttings. Indole-3-butyric acid (IBA) was applied at the base of the cuttings. Cutting survival at greenhouse exit (GE), rooting at shade house exit (SHE), morphology and root anatomy were evaluated. In 189 days, the scarification of roots promoted 76.92% of budding. The percentage of sprouted matrices, number of shoots per matrice, length, diameter, and shoot length/diameter ratio increased over time. Only 12.2% of the cuttings survived in GE, and of these, 7.9% rooted in SHE. The cutting resulted in the formation of a clonal mini-garden of 'candeia', with seven of the 19 matrices submitted to propagation. The anatomical analyses showed that bud formation occurs from cell redifferentiation in the phloem parenchyma, and presence of crystals on the walls of the vessel elements of the secondary xylem. The shoots induction from scarification of roots could be used as a silvicultural practice for the reestablishment of the native fragments handle.
Resumo Os povoamentos nativos de candeia (Eremanthus erythropappus) vêm sendo explorados por planos de manejo devido ao potencial econômico do óleo essencial. O resgate de árvores adultas, bem como a aplicação de técnicas silviculturais que favoreçam o restabelecimento do povoamento podem contribuir para a conservação genética dessa espécie. O objetivo desse trabalho foi avaliar a eficiência de técnicas de propagação para o resgate de 26 matrizes de candeia em um povoamento natural manejado e discutir sobre a rizogênese. Em agosto de 2017, as árvores foram induzidas à rebrota por meio da decepa, seguida da exposição e escarificação das raízes. A emissão brotações e morfologia foram avaliadas de acordo com a origem (toco ou raiz). Após esse período, 19 matrizes tiveram as brotações recolhidas para o preparo de estacas apicais, que foram tratadas com ácido indolbutírico (AIB). A sobrevivência das estacas na saída da casa de vegetação (SCV), o enraizamento na saída da casa de sombra (SCS), a morfologia e a anatomia da raiz foram avaliados. Aos 189 dias, a escarificação das raízes resultou em 76,92% de emissão de brotos. O percentual de matrizes brotadas, número de brotos por matriz, comprimento, diâmetro e relação comprimento/diâmetro dos brotos aumentaram ao longo do período avaliado. Somente 12,2% das estacas sobreviveram na SCV e 7,9% enraizaram na SCS. A estaquia resultou na formação de um minijardim clonal de candeia com sete das dezenove matrizes submetidas à propagação. As análises anatômicas mostraram a diferenciação das células na região do parênquima floemático e a presença de cristais de inulina nas paredes dos elementos de vaso do xilema secundário. A indução de brotos radiculares pode ser usada como prática silvicultural visando o restabelecimento de fragmentos nativos manejados.
Subject(s)
Plant Roots , Asteraceae , Reproduction, Asexual , Trees , Cell DivisionABSTRACT
The native stands of 'candeia' (Eremanthus erythropappus) have been explored through management plans due to the economic potential of essential oil. The rescue of adult trees, as well as the application of silvicultural techniques that favor the restoration of the stand, can contribute to the genetic conservation of this species. This study's objective was to assess the efficiency of propagation techniques for the rescue of 26 matrices of 'candeia' in a natural managed stand and discussion about the rhizogenesis. In August 2017, trees were induced to regrowth by coppice, followed by exposure and scarification of roots. The emergence of shoots and morphology were evaluated according to the origin (i.e., stump or root). After that period, 19 matrices had their sprouts collected for the preparation of apical cuttings. Indole-3-butyric acid (IBA) was applied at the base of the cuttings. Cutting survival at greenhouse exit (GE), rooting at shade house exit (SHE), morphology and root anatomy were evaluated. In 189 days, the scarification of roots promoted 76.92% of budding. The percentage of sprouted matrices, number of shoots per matrice, length, diameter, and shoot length/diameter ratio increased over time. Only 12.2% of the cuttings survived in GE, and of these, 7.9% rooted in SHE. The cutting resulted in the formation of a clonal mini-garden of 'candeia', with seven of the 19 matrices submitted to propagation. The anatomical analyses showed that bud formation occurs from cell redifferentiation in the phloem parenchyma, and presence of crystals on the walls of the vessel elements of the secondary xylem. The shoots induction from scarification of roots could be used as a silvicultural practice for the reestablishment of the native fragments handle.
Subject(s)
Asteraceae , Plant Roots , Cell Division , Reproduction, Asexual , TreesABSTRACT
Abstract This study aimed to analyze the physical properties of the seeds of Moquiniastrum polymorphum when processed by mini-SAS, X-ray and seed blower systems. The seeds were purchased from Seeds Caiçara, located in Penápolis-SP. After purchase, the seed lot was characterized by standard tests. In the X-ray test the seeds were classified according to their internal morphology as filled, unfilled or malformed. The seed blower was set at six opening settings, resulting in light and heavy fractions. The evaluations were performed by weighing the seeds that remained in the blower (heavy fraction) and by the amount of filled seeds indicated by the X-ray test. The germination tests were composed of four replicates of 50 seeds. The mini-SAS was used for external evaluation. It was concluded that the combined use of the seed blower and the X-ray test was efficient for the evaluation and determination of the physical quality of the seeds of M. polymorphum. The seed blower at opening settings 5 resulted in the best lot quality. The external parameters were not able to qualitatively evaluate the seeds of M. polymorphum.
Resumo O presente estudo objetivou analisar as propriedades físicas das sementes de Moquiniastrum polymorphum por meio dos equipamentos raios-X, mini-SAS e soprador de sementes. As sementes foram adquiridas da empresa Sementes Caiçara em matrizes localizadas no município de Penápolis-SP. Após adquirido e beneficiado, o lote de sementes foi caracterizado por meio de testes padrões. No teste de raios-X as sementes foram classificadas de acordo com sua morfologia interna como cheias, vazias ou mal formadas. O soprador de sementes foi ajustado em seis aberturas, resultando em frações leves e pesadas. As avaliações foram realizadas pesando-se as sementes que permaneceram no soprador (fração pesada) e pela quantidade de sementes cheias pela análise de raios-X. Posteriormente foram realizados testes de germinação compostos por quatro repetições de 50 sementes. Na avaliação externa das sementes utilizou-se o equipamento mini-SAS. Após análise dos dados, concluiu-se que a utilização em conjunto dos equipamentos soprador de sementes e raios-X foi eficiente para avaliação e determinação da qualidade física das sementes de M. polymorphum. O soprador de sementes na regulagem da abertura 5 resultou na melhor qualidade do lote. Os parâmetros externos não foram capazes de avaliar qualitativamente as sementes de M. polymorphum.
Subject(s)
Seeds/physiology , Asteraceae/physiology , Seeds/growth & development , Germination , Asteraceae/growth & developmentABSTRACT
This study aimed to analyze the physical properties of the seeds of Moquiniastrum polymorphum when processed by mini-SAS, X-ray and seed blower systems. The seeds were purchased from Seeds Caiçara, located in Penápolis-SP. After purchase, the seed lot was characterized by standard tests. In the X-ray test the seeds were classified according to their internal morphology as filled, unfilled or malformed. The seed blower was set at six opening settings, resulting in light and heavy fractions. The evaluations were performed by weighing the seeds that remained in the blower (heavy fraction) and by the amount of filled seeds indicated by the X-ray test. The germination tests were composed of four replicates of 50 seeds. The mini-SAS was used for external evaluation. It was concluded that the combined use of the seed blower and the X-ray test was efficient for the evaluation and determination of the physical quality of the seeds of M. polymorphum. The seed blower at opening settings 5 resulted in the best lot quality. The external parameters were not able to qualitatively evaluate the seeds of M. polymorphum.
Subject(s)
Asteraceae/physiology , Seeds/physiology , Asteraceae/growth & development , Germination , Seeds/growth & developmentABSTRACT
Several snake species possess, in their circulating blood, endogenous PLA2 inhibitors (sbPLIs) with the primary function of natural protection against toxic enzymes from homologous and heterologous venoms. Among the three structural classes of sbPLIs - named α, ß, and γ - the ß class (sbßPLIs) is the least known with only four identified sequences, so far. The last class of inhibitors encompass molecules with leucine rich repeats (LRRs) motifs containing repeating amino acid segments. In the present study, we identified and characterized putative sbßPLIs from the liver and venom glands of six Latin American pit vipers belonging to Bothrops and Crotalus genera. The inhibitor from Crotalus durissus terrificus snakes (CdtsbßPLI) was chosen as a reference for the construction of the first in silico structural model for this class of inhibitors, using molecular modeling and molecular dynamics simulations. Detailed analyses of the electrostatic surface of the CdtsbßPLI model and protein-protein docking with crotoxin B from homologous venoms predict the interacting surface between these proteins.
ABSTRACT
Abstract The native stands of candeia (Eremanthus erythropappus) have been explored through management plans due to the economic potential of essential oil. The rescue of adult trees, as well as the application of silvicultural techniques that favor the restoration of the stand, can contribute to the genetic conservation of this species. This studys objective was to assess the efficiency of propagation techniques for the rescue of 26 matrices of candeia in a natural managed stand and discussion about the rhizogenesis. In August 2017, trees were induced to regrowth by coppice, followed by exposure and scarification of roots. The emergence of shoots and morphology were evaluated according to the origin (i.e., stump or root). After that period, 19 matrices had their sprouts collected for the preparation of apical cuttings. Indole-3-butyric acid (IBA) was applied at the base of the cuttings. Cutting survival at greenhouse exit (GE), rooting at shade house exit (SHE), morphology and root anatomy were evaluated. In 189 days, the scarification of roots promoted 76.92% of budding. The percentage of sprouted matrices, number of shoots per matrice, length, diameter, and shoot length/diameter ratio increased over time. Only 12.2% of the cuttings survived in GE, and of these, 7.9% rooted in SHE. The cutting resulted in the formation of a clonal mini-garden of candeia, with seven of the 19 matrices submitted to propagation. The anatomical analyses showed that bud formation occurs from cell redifferentiation in the phloem parenchyma, and presence of crystals on the walls of the vessel elements of the secondary xylem. The shoots induction from scarification of roots could be used as a silvicultural practice for the reestablishment of the native fragments handle.
Resumo Os povoamentos nativos de candeia (Eremanthus erythropappus) vêm sendo explorados por planos de manejo devido ao potencial econômico do óleo essencial. O resgate de árvores adultas, bem como a aplicação de técnicas silviculturais que favoreçam o restabelecimento do povoamento podem contribuir para a conservação genética dessa espécie. O objetivo desse trabalho foi avaliar a eficiência de técnicas de propagação para o resgate de 26 matrizes de candeia em um povoamento natural manejado e discutir sobre a rizogênese. Em agosto de 2017, as árvores foram induzidas à rebrota por meio da decepa, seguida da exposição e escarificação das raízes. A emissão brotações e morfologia foram avaliadas de acordo com a origem (toco ou raiz). Após esse período, 19 matrizes tiveram as brotações recolhidas para o preparo de estacas apicais, que foram tratadas com ácido indolbutírico (AIB). A sobrevivência das estacas na saída da casa de vegetação (SCV), o enraizamento na saída da casa de sombra (SCS), a morfologia e a anatomia da raiz foram avaliados. Aos 189 dias, a escarificação das raízes resultou em 76,92% de emissão de brotos. O percentual de matrizes brotadas, número de brotos por matriz, comprimento, diâmetro e relação comprimento/diâmetro dos brotos aumentaram ao longo do período avaliado. Somente 12,2% das estacas sobreviveram na SCV e 7,9% enraizaram na SCS. A estaquia resultou na formação de um minijardim clonal de candeia com sete das dezenove matrizes submetidas à propagação. As análises anatômicas mostraram a diferenciação das células na região do parênquima floemático e a presença de cristais de inulina nas paredes dos elementos de vaso do xilema secundário. A indução de brotos radiculares pode ser usada como prática silvicultural visando o restabelecimento de fragmentos nativos manejados.
ABSTRACT
PURPOSE: To evaluate the change in visual function after starting glaucoma treatment and correlate this to a decrease in intraocular pressure (IOP) in primary open-angle glaucoma patients. METHODS: A prospective, randomized clinical trial was carried out involving 54 glaucoma patients (54 eyes). After inclusion, patients randomly received timolol maleate 0.5%, brimonidine tartrate 0.2%, or travoprost 0.004% in one randomly selected eye. Patients underwent Goldmann applanation tonometry, visual acuity test, standard automated perimetry (SAP), visual quality perception test (visual analogue scale), and contrast sensitivity (CS) test, in a random order before and after the 4-week glaucoma treatment. RESULTS: There were statistically significant changes in IOP (mean change [standard deviation], 7.8 [3.6] mmHg, P<0.001), SAP mean deviation index (0.84 [2.45] dB, P=0.02), visual quality perception (0.56 [1.93], P=0.045), and CS at frequencies of 12 cycles/degree (0.10 [0.37], P=0.03) and 18 cycles/degree (0.18 [0.42], P=0.02) after the 4-week treatment when compared with baseline. No statistically significant differences were found between the treatment groups in visual function changes after treatment (P>0.40). No significant correlations between IOP reduction and changes in visual function were found (P>0.30). CONCLUSIONS: Visual quality perception, visual field mean deviation index, and CS at higher frequencies improve after starting glaucoma therapy. However, no correlation was found between IOP reduction and changes in visual function, and no differences were found in visual function when the three medications studied were compared.
Subject(s)
Antihypertensive Agents/therapeutic use , Glaucoma, Open-Angle/drug therapy , Glaucoma, Open-Angle/physiopathology , Visual Acuity/drug effects , Visual Perception/drug effects , Aged , Brimonidine Tartrate , Cloprostenol/analogs & derivatives , Cloprostenol/therapeutic use , Contrast Sensitivity/drug effects , Female , Humans , Intraocular Pressure/drug effects , Male , Middle Aged , Prospective Studies , Quinoxalines/therapeutic use , Timolol/therapeutic use , Travoprost , Visual Fields/drug effectsABSTRACT
AIMS: To establish four normal retinal nerve fibre layer (RNFL) thickness radial profiles based on third-generation optical coherence tomography (OCT) and to compare them with previously reported histologic measurements. METHODS: A total of 20 normal eyes were studied. A circular scan was adjusted to the size of the optic disc and three scans were performed with this radius and every 200 microm thereafter, up to a distance of 1400 microm. Four different radial sections (superotemporal, superonasal, inferonasal, and inferotemporal) were studied to establish RNFL thickness OCT profiles. Additionally, two radial scans orientated at 45 and 135 degrees crossing the optic disc centre were performed in six of 20 eyes, and RNFL thickness was measured at disc margin. RESULTS: Quadrant location and distance from disc margin interaction in RNFL thickness was statistically significant (P<0.001). The RNFL thickness decreased (P<0.001) as the distance from the disc margin increased for all sections. The measurements automatically generated by the OCT built-in software were thinner (P<0.001) than histologic ones close to the disc margin. CONCLUSIONS: Four normal OCT RNFL profiles were established and compared with histological data obtained from the same area. RNFL measurements assessed by OCT 3 were significantly thinner close to the optic disc margin.
Subject(s)
Nerve Fibers/ultrastructure , Retinal Ganglion Cells/cytology , Adolescent , Adult , Aged , Aged, 80 and over , Epidemiologic Methods , Female , Humans , Image Processing, Computer-Assisted/methods , Male , Middle Aged , Optic Disk/anatomy & histology , Tomography, Optical Coherence/methodsABSTRACT
AIMS: To evaluate the effect of the combination of bimatoprost and latanoprost on intraocular pressure (IOP) in primary open angle glaucoma (POAG). METHODS: An open label randomised clinical trial was conducted, which included 18 glaucomatous patients (36 eyes). In the first 4 weeks, latanoprost 0.005% was prescribed for both eyes of the patients and any other antiglaucoma medication was discontinued. In the next 4 weeks (phase 1), bimatoprost 0.03% was combined with latanoprost in one randomly assigned eye (case eye) of each patient. In the next 4 weeks (phase 2), bimatoprost was discontinued in the case eyes, while bimatoprost was substituted for latanoprost in the fellow eye (control eye). The IOP was measured at the end of the first 4 weeks (baseline measurement) and weekly during phases 1 and 2. RESULTS: In the case eyes, the mean IOP increased along the first phase (1.8 mm Hg; p = 0.006) when compared to baseline measurements. The IOP returned to previous values after discontinuation of bimatoprost in phase 2. In the control eyes, the mean IOP did not change throughout the study. CONCLUSION: The combination of bimatoprost and latanoprost in POAG increases the IOP and should not be considered as a therapeutic option.
Subject(s)
Antihypertensive Agents/therapeutic use , Glaucoma, Open-Angle/drug therapy , Intraocular Pressure/drug effects , Lipids/therapeutic use , Prostaglandins F, Synthetic/therapeutic use , Aged , Amides , Bimatoprost , Cloprostenol/analogs & derivatives , Drug Therapy, Combination , Female , Glaucoma, Open-Angle/physiopathology , Humans , Latanoprost , Male , Middle Aged , Treatment OutcomeABSTRACT
The method of phototransferred thermoluminescence (PTTL), using CaSO(4):Dy pellets produced at IPEN as sensitive material, was used to detect the spread laser radiation inside the surgery room during refractive surgical procedures using ArF excimer lasers. The purpose of this work was to study the viability of performing the ultraviolet radiation (UVR) exposure detection of patients and the hospital's surgical staff during a refractive surgery. The CaSO(4):Dy pellets were positioned at different distances from the laser source inside the surgery room: patient's ( congruent with 0.15 m), surgeon's ( congruent with 0.5 m) and nurse's ( congruent with 1.0 m) foreheads, lateral ( congruent with 1.5 m) and back ( congruent with 4.0 m) walls. The measurements of PTTL were carried out at two different conditions: five surgeries, each one taking approximately 10 min, and during a period of 4 h (cumulative), when several operations were performed. The detectors positioned as far as 4.0 m from the UV laser source were sensitised, making the UVR detection feasible at large source-detector distances. The absorbed energy was detected in the range from 40 microJ to 30 mJ during a surgery. This result indicates that the method studied can be used to detect the spread UVR.
Subject(s)
Occupational Exposure/analysis , Occupational Exposure/statistics & numerical data , Photorefractive Keratectomy/statistics & numerical data , Radiation Protection/methods , Risk Assessment/methods , Thermoluminescent Dosimetry/methods , Ultraviolet Rays , Body Burden , Brazil/epidemiology , Humans , Lasers, Excimer , Radiation Dosage , Refractive Errors/epidemiology , Refractive Surgical Procedures , Relative Biological Effectiveness , Risk Factors , Thermoluminescent Dosimetry/instrumentationABSTRACT
BACKGROUND/AIMS: To determine the potential of an intravitreal sustained release naproxen and 5-fluorouracil (NA/5-FU) codrug for the treatment of experimental proliferative vitreoretinopathy (PVR) in a model for trauma associated tractional retinal detachment (TRD). METHODS: Sustained release pellets were prepared by covalently linking naproxen to 5-fluorouracil. Drug release was tested in vitro and toxic effects were evaluated by electroretinography and light microscopy. Traumatic PVR was induced in pigmented rabbits by performing a scleral laceration, followed by repair and intravitreal injection of 0.4 ml of autologous blood. Thirty six eyes were treated with a sustained release implant containing 1.5 mg NA/5-FU as a codrug and 36 control eyes were submitted to surgery alone. Eyes were evaluated for TRD by serial indirect ophthalmoscope examination at different time points followed by postmortem fundus evaluation of the enucleated eye RESULTS: The NA/5-FU pellets were found to provide linear release of 5-FU and naproxen over the 30 day duration of the in vitro release test. Both the severity of PVR grade and the percentage of eyes with moderate or worse tractional detachment were significantly lower in eyes treated with the codrug pellet. There were no drug related toxic effects evident on histopathological or electroretinograph examination of eyes containing the NA/5-FU pellet. CONCLUSIONS: The results suggest that this NA/5-FU codrug device effectively inhibits the progression of PVR in a rabbit trauma model that closely resembles PVR in humans. Additional studies to add knowledge to these initial findings and to clarify the potential of the codrug device for the treatment of human PVR are warranted.
Subject(s)
Anti-Inflammatory Agents, Non-Steroidal/therapeutic use , Fluorouracil/therapeutic use , Naproxen/therapeutic use , Retinal Detachment/drug therapy , Vitreoretinopathy, Proliferative/drug therapy , Animals , Anti-Inflammatory Agents, Non-Steroidal/adverse effects , Biodegradation, Environmental , Disease Models, Animal , Drug Combinations , Drug Implants , Electroretinography/methods , Eye Enucleation , Eye Injuries/complications , Eye Injuries/drug therapy , Fluorouracil/adverse effects , Naproxen/adverse effects , Rabbits , Retinal Detachment/complicationsABSTRACT
Cytomegalovirus (CMV) infection is the most common congenital infection, affecting 0.4% to 2.3% newborns. Most of them are asymptomatic at birth, but later 10% develop handicaps, mainly neurological disturbances. Our aim was to determine the prevalence of CMV shed in urine of newborns from a neonatal intensive care unit using the polymerase chain reaction (PCR) and correlate positive cases to some perinatal aspects. Urine samples obtained at first week of life were processed according to a PCR protocol. Perinatal data were collected retrospectively from medical records. Twenty of the 292 cases (6.8%) were CMV-DNA positive. There was no statistical difference between newborns with and without CMV congenital infection concerning birth weight (p=0.11), gestational age (p=0.11), Apgar scores in the first and fifth minutes of life (p=0.99 and 0. 16), mother's age (p=0.67) and gestational history. Moreover, CMV congenital infection was neither related to gender (p=0.55) nor to low weight (<2,500 g) at birth (p=0.13). This high prevalence of CMV congenital infection (6.8%) could be due to the high sensitivity of PCR technique, the low socioeconomic level of studied population or the severe clinical status of these newborns.
Subject(s)
Cytomegalovirus Infections/epidemiology , Cytomegalovirus/isolation & purification , Adult , Brazil/epidemiology , Cytomegalovirus Infections/congenital , Cytomegalovirus Infections/urine , DNA Primers , Female , Humans , Infant, Newborn , Intensive Care Units, Neonatal/statistics & numerical data , Male , Polymerase Chain Reaction/methods , Prevalence , Socioeconomic FactorsABSTRACT
1) A tecnica de criar uma ponte subclavia esquerda carotida esquerda, previamente a cirurgia do arco aortico, transforma o sistema supra-aortico em dois troncos braquiocefalicos. 2) A presenca de dois troncos braquiocefalicos no sistema arterial permite a perfusao cerebral total, por meio de circulacao extracorporea, atraves da perfusao de ambas as arterias auxiliares, quando se interrompe a circulacao no arco aortico. 3) Esta nova variacao tecnica permite ao cirurgiao abordar o aneurisma do arco aortico, com maior seguranca, sob o ponto de vista de protecao cerebral e com maior facilidade tecnica por nao colocar sobre o campo operatorio multiplas canulas de perfusao, que tendem a dificultar o ato cirurgico. 4) A reconstrucao do novo arco aortico fica simplificado, por exigir a anastomose de apenas dois troncos supra-aorticos, a inominada e a carotida esquerda, pelo fato de estarmos agora diante de dois troncos braquiocefalicos
