Phytosociological survey on native pasture of Paspalum notatum

Todos os textos, informa??es e resultados apresentados s?o de inteira responsabilidade dos autores.Coordenador/Orientador do Projeto: M?rcia Vit?ria Santos.Parte da inicia??o cientifica do primeiro autor, financiado pelo Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq), Funda??o de Amparo ? Pesquisa do Estado de Minas Gerais (FAPEMIG) e Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES).Objetivou-se com esse trabalho, realizar o levantamento fitossociol?gico em pastagem nativa de Paspalum notatum no munic?pio de Couto de Magalh?es de Minas-MG. O levantamento fitossociol?gico foi realizado em pastagem nativa de Paspalum notatum no munic?pio de Couto de Magalh?es de Minas MG. Para a identifica??o das plantas daninhas foi utilizado o m?todo do quadrado invent?rio, lan?ando ao acaso na ?rea 40 vezes um quadro de um metro de lado, totalizando uma ?rea amostral de 40m2. Avaliou-se a frequ?ncia (Fre), densidade (Den) e abund?ncia (Abu) das esp?cies encontradas na pastagem. Foram identificadas esp?cies distribu?das em seis fam?lias, destacando-se a fam?lia das Poaceae com cinco esp?cies. As esp?cies que apresentaram maior frequ?ncia (Fre) foram Sidastrum micranthum (malva-preta), Rhynchelystrum repens (capim-favorito) e Crotalaria incana (xique-xique), respectivamente. As esp?cies Eupatorium maximilianii (mata-pasto), Paspalum notatum (grama batatais) e Brachiaria decumbens (braquiarinha), apresentaram os maiores valores de densidade (Den), respectivamente. Paspalum notatum (grama batatais), Eupatorium maximilianii (mata-pasto) e Brachiaria decumbens (braquiarinha) foram ?s esp?cies que apresentaram maior abund?ncia (Abu). A pastagem de Paspalum notatum encontra-se infestada com esp?cies daninhas necessitando controle e corre??o do manejo do pasto para maior desempenho animal.The aim of this study was to do the phytosociological evaluation on a native pasture of Paspalum notatum in Couto de Magalh?es de Minas-MG. The phytosociological evaluation was made on native pasture of Paspalum notatum in Couto de Magalh?es de Minas-MG. To identification of the weed, the method used was the square inventory, hurled randomly in the area 40 times a square of one meter of side, totaling 40m2 of sample area. It was evaluate the frequency (Fre), density (Den), and abundancy (Abu) of the species found in the area. It was identified species of six families, standing out the family of the Poaceae including five species. The species that presented more frequency (Fre) were Sidastrum micranthum (dainty sandmallow), Rhynchelystrum repens (natal grass), and Crotalaria incana (woolly rattlepod), respectively. The species Eupatorium maximilianii ("mata-pasto"), Paspalum notatum (pensacola), and Brachiaria decumbens (signal grass), presented the higher values of density (Den), respectively. Paspalum notatum (pensacola), Eupatorium maximilianii ("mata-pasto"), and Brachiaria decumbens (signal grass), were the species that presented higher abundancy (Abu). The pasture of Paspalum notatum has found infested by weed, requiring control and correction of the management of the area to increase the animal performance

Pastures degradation assessment by infestation in plants weeds

Parte da inicia??o cientifica do primeiro autor, financiado pelo CNPq, FAPEMIG, CAPES.Todos os textos, informa??es e resultados apresentados s?o de inteira responsabilidade dos autores.Objetivou-se a partir desse trabalho avaliar a degrada??o de uma pastagem nativa de Paspalum notatum a partir da ocorr?ncia de plantas daninhas. O levantamento fitossociol?gico foi realizado em pastagem nativa de Paspalum notatum no munic?pio de Couto de Magalh?es de Minas - MG. Para a identifica??o das plantas daninhas foi utilizado o m?todo do quadrado invent?rio, lan?ando ao acaso na ?rea 40 vezes um quadro de um metro de lado, totalizando uma ?rea amostral de 40m2. Avaliou-se a frequ?ncia relativa (Frr), densidade relativa (Der), abund?ncia relativa (Abr) e o ?ndice de valor de import?ncia (IVI) das esp?cies encontradas na ?rea. Os maiores valores de frequ?ncia relativa (Frr) foram das esp?cies Sidastrum micrathum (malva-preta), Imperata brasiliensis (Sap?), Crotalaria incana (xique-xique) e Mimosa pudica (dormideira), respectivamente. As esp?cies Eupatorium maximilianii (mata-pasto), Paspalum notatum (grama batatais), Brachiaria decumbens (braquiarinha) e Cynodon dactylon (estrela roxa) apresentaram os maiores valores de densidade relativa, abund?ncia relativa e ?ndice de valor de import?ncia. A presen?a de Brachiaria decumbens, Cynodon dactylon, Eupatorium maximilianii e a baixa frequ?ncia relativa da esp?cie nativa s?o indicativos que a pastagem encontrase em est?dio de degrada??o avan?ado.ABSTRACT The objective of this study was to evaluate the degradation of a native pasture of Paspalum notatum starting from the weeds occurrence. The phytosociological evaluation was made in native pasture of Paspalum notatum in Couto de Magalh?es de Minas - MG. To identify the weed the method of the inventory square was utilized, hurled randomly in the area 40 times a square of one meter of side, totaling 40m2 of sample area. It was evaluate the relative frequency (Frr), relative density (Der), relative abundancy (Abr), and the value of importance index (IVI) of the species found in the area. The higher values of relative frequency (Frr) were of the species Sidastrum micrathum (dainty sandmallow), Imperata brasiliensis (cogon grass), Crotalaria incana (woolly rattlepod), and Mimosa pudica (sensitive plant), respectively. The species Eupatorium maximilianii ("mata-pasto"), Paspalum notatum (pensacola), Brachiaria decumbens (signal grass), and Cynodon dactylon (bernuda grass) presented the higher values of relative density (Drr), relative abundancy (Abr), and value of importance index (IVI). The presence of the Brachiaria decumbens, Cynodon dactylon, Eupatorium maximilianii and the lower frequency of the native specie, are indicatives that the pasture has found in advanced state of degradation

Pentoxifylline associated to hypertonic saline solution attenuates inflammatory process and apoptosis after intestinal ischemia/reperfusion in rats

PURPOSE:To evaluate intestinal inflammatory and apoptotic processes after intestinal ischemia/reperfusion injury, modulated by pentoxifylline and hypertonic saline.METHODS:It was allocated into four groups (n=6), 24 male Wistar rats (200 to 250g) and submitted to intestinal ischemia for 40 min and reperfusion for 80 min: IR (did not receive any treatment); HS group (Hypertonic Saline, 4ml/kg-IV); PTX group (Pentoxifylline, 30mg/kg-IV); HS+PTX group (Hypertonic Saline and Pentoxifylline). All animals were heparinized (100U/kg). At the end of reperfusion, ileal fragments were removed and stained on hematoxylin-eosin and histochemical studies for COX-2, Bcl-2 and cleaved caspase-3.RESULTS:The values of sO2 were higher on treated groups at 40 minutes of reperfusion (p=0.0081) and 80 minutes of reperfusion (p=0.0072). Serum lactate values were lower on treated groups after 40 minutes of reperfusion (p=0.0003) and 80 minutes of reperfusion (p=0.0098). Morphologic tissue injuries showed higher grades on IR group versus other groups: HS (p=0.0006), PTX (p=0.0433) and HS+PTX (p=0.0040). The histochemical study showed lesser expression of COX-2 (p=0.0015) and Bcl-2 (p=0.0012) on HS+PTX group. A lower expression of cleaved caspase-3 was demonstrated in PTX (p=0.0090; PTXvsIR).CONCLUSION:The combined use of pentoxifylline and hypertonic saline offers best results on inflammatory and apoptotic inhibitory aspects after intestinal ischemia/reperfusion.São Paulo University Medical SchoolUSP Medical SchoolFederal University of São Paulo Medical SchoolUSP School of MedicineUSP School of Medicine Department of SurgeryUSP Medical School Department of SurgeryUNIFESP, Medical SchoolSciEL

Observation of an Excited Bc+ State

Using pp collision data corresponding to an integrated luminosity of 8.5 fb-1 recorded by the LHCb experiment at center-of-mass energies of s=7, 8, and 13 TeV, the observation of an excited Bc+ state in the Bc+π+π- invariant-mass spectrum is reported. The observed peak has a mass of 6841.2±0.6(stat)±0.1(syst)±0.8(Bc+) MeV/c2, where the last uncertainty is due to the limited knowledge of the Bc+ mass. It is consistent with expectations of the Bc∗(2S31)+ state reconstructed without the low-energy photon from the Bc∗(1S31)+→Bc+γ decay following Bc∗(2S31)+→Bc∗(1S31)+π+π-. A second state is seen with a global (local) statistical significance of 2.2σ (3.2σ) and a mass of 6872.1±1.3(stat)±0.1(syst)±0.8(Bc+) MeV/c2, and is consistent with the Bc(2S10)+ state. These mass measurements are the most precise to date

Can the understory affect the Hymenoptera parasitoids in a Eucalyptus plantation?

The understory in forest plantations can increase richness and diversity of natural enemies due to greater plant species richness. The objective of this study was to test the hypothesis that the presence of the understory and climatic season in the region (wet or dry) can increase the richness and abundance of Hymenoptera parasitoids in Eucalyptus plantations, in the municipality of Belo Oriente, Minas Gerais State, Brazil. In each eucalyptus cultivation (five areas of cultivation) ten Malaise traps were installed, five with the understory and five without it. A total of 9,639 individuals from 30 families of the Hymenoptera parasitoids were collected, with Mymaridae, Scelionidae, Encyrtidae and Braconidae being the most collected ones with 4,934, 1,212, 619 and 612 individuals, respectively. The eucalyptus stands with and without the understory showed percentage of individuals 45.65% and 54.35% collected, respectively. The understory did not represent a positive effect on the overall abundance of the individuals Hymenoptera in the E. grandis stands, but rather exerted a positive effect on the specific families of the parasitoids of this order

Observation of a resonant structure near the Ds+Ds−D_s^+ D_s^- threshold in the B+→Ds+Ds−K+B^+\to D_s^+ D_s^- K^+ decay

An amplitude analysis of the $B^+\to D_s^+ D_s^- K^+$ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV. A near-threshold peaking structure, referred to as $X(3960)$, is observed in the $D_s^+ D_s^-$ invariant-mass spectrum with significance greater than 12 standard deviations. The mass, width and the quantum numbers of the structure are measured to be $3956\pm5\pm10$ MeV, $43\pm13\pm8$ MeV and $J^{PC}=0^{++}$, respectively, where the first uncertainties are statistical and the second systematic. The properties of the new structure are consistent with recent theoretical predictions for a state composed of $c\bar{c}s\bar{s}$ quarks. Evidence for an additional structure is found around 4140 MeV in the $D_s^+ D_s^-$ invariant mass, which might be caused either by a new resonance with the $0^{++}$ assignment or by a $J/\psi \phi\leftrightarrow D_s^+ D_s^-$ coupled-channel effect.Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-018.html (LHCb public pages