Performance of soybean seedlings upon nutrient application by seed coating

The aim of this study was to evaluate the effect of different seed coatings consisting of various combinations of three nutrients (calcium, magnesium and silicon) on two soybean cultivars (BRS 243 RR and CD 233 RR). Dolomitic limestone and aluminum silicate were chosen as the nutrient sources. Leaf area, plant height, shoots dry matter, crop growth rate, relative growth rate and net assimilation rate were the studied variables, evincing that the seed coating that comprised calcium, magnesium and silicon led to better performance in terms of growth rates 30 days after emergence. Significant differences in the response to the seed coatings were also observed between the two studied soybean genotypes

Atividade antioxidante total em frutos de diferentes genótipos de umbuzeiro oriundos de Petrolina, PE.

Este trabalho teve como objetivo avaliar a atividade antioxidante total dos extratos fenólicos obtidos de frutos de 32 genótipos de umbuzeiro através de dois métodos: ABTS e Sistema l3-caroteno/ácido linoléico

Using three-phase partitioning for the purification and recovery of antibodies from biological media

Antibodies, in particular immunoglobulin G (IgG), are one of the biopharmaceutical industry highflyers, with relevance for the treatment of several diseases. However, the recovery of antibodies from complex biological media with high quality and purity is difficult and requires multi-step and expensive approaches. Herein, we propose a cost-effective approach using three-phase partitioning (TPP) systems based on polyethylene glycol (PEG)-salt aqueous biphasic systems (ABS) with ionic liquids (ILs) as adjuvants for the purification and recovery of IgG antibodies from three biological media, i.e., human serum, and serum-containing and serum-free Chinese hamster ovary (CHO) cell culture supernatants. The economic analysis of the developed process was carried out. The results obtained using PEG-salt ABS without ILs and human serum show that IgG could be recovered either at the interphase of the TPP or in the top phase, depending on the molecular weight of the PEG. The system composed of PEG with a molecular weight of 1000 g/mol is the PEG-salt system enabling the highest purity of human polyclonal IgG at the interphase (80.7 %, with a recovery yield of 65.8 %). Still, by adding 1 wt% of the ILs tetra(n-butyl)ammonium bromide ([N4444]Br) and 1-butyl-3-methylimidazolium chloride ([C4mim]Cl), it is possible to compete or even outperform the PEG 1000-salt system with no IL regarding purity/recovery performance and production costs under given operation conditions. The best systems were then applied for the purification and recovery of monoclonal antibodies from serum-containing and serum-free culture supernatants. Improved recovery of monoclonal antibodies from serum-free Chinese hamster ovary (CHO) cell culture supernatants with a reduction of the host cell proteins (HCPs) content are obtained by introducing ILs as adjuvants in PEG-salt systems, with [N4444]Br providing the lowest production costs. Overall, TPP systems were shown to be not only cost-effective, but also robust and flexible routes to purify and recover IgG from complex biological matrices as shown here with human serum, serum-containing and serum-free cell culture supernatants.publishe

Levantamento preliminar da fauna edáfica em remanescente florestal, no município de Plácido de Castro, AC.

O objetivo deste trabalho foi realizar um levantamento da fauna edáfica em um remanescente florestal, no município de Plácido de Castro, AC. A transição de uma floresta para uma pastagem, apresenta redução na diversidade de espécies. Dentre os organismos, os insetos são considerados bons indicadores ambientais, devido à grande diversidade de espécies e habitat, além da sua importância nos processos biológicos dos ecossistemas naturais

Higher Order Statistics in a mmWave Propagation Environment

(c) 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.[EN] A thorough measurement campaign in an indoor environment at the millimeter-wave band is carried out with an aim at characterizing the short-term fading channel in terms of its higher-order statistics. The measurements are conducted in a variety of scenarios, with frequencies ranging from 55 to 65 GHz, in line-of-sight and non-line-of-sight conditions, and combinations of horizontal and vertical polarizations at both the transmitter and the receiver. A number of fading models are tested, namely Rayleigh, Rice, Nakagami-m, alpha-mu, kappa-mu, eta-mu, and alpha-eta-kappa-mu. The main second-order statistics under analysis are the level crossing rate (LCR) and average fade duration (AFD) both given per distance unit. From the experimental data, the parameters of these statistics are estimated, and the corresponding curves of the theoretical models are compared with the empirical ones and the best model is selected. Additionally, the study of the very general distribution, namely alpha-eta-kappa-mu, is advanced, in which new expressions for time-/distance-domain LCR and Al-ll are derived using an envelope-based approach. Such an approach leads to integral-form formulations with much less computational complexity and computes rapidly compared with the already existing ones presented elsewhere, also given in the integral form. Furthermore, a series of expansion expression for the alpha-eta-kappa-mu time-/distance-domain LCR is then derived that improves even further the computational time.This work was supported in part by the Conselho Nacional de Desenvolvimento Cientico e Tecnologico (CNPq) under Grant 304248/2014-2 and Grant 308365/2017-8, in part by the Rede Nacional de Ensino e Pesquisa (RNP), with resources from Ministerio da Ciencia, Tecnologia, Inovacoes e Comunicacoes (MCTIC), through the Radiocommunication Reference Center [Centro de Referencia em Radiocomunicacoes (CRR)] Project of the National Institute of Telecommunications [Instituto Nacional de Telecomunicacoes (INATEL)], Brazil, under Grant 01250.075413/2018-04, and in part by the Ministerio de Economia, Industria y Competitividad of the Spanish Government through the Agencia Estatal de Investigacion (AEI) and the Fondo Europeo de Desarrollo Regional (FEDER) under Project TEC2017-86779-C2-2-R.Dos Anjos, AA.; Rufino-Marins, TR.; Nogueira Da Silva, CR.; Rodrigo Peñarrocha, VM.; Rubio Arjona, L.; Reig, J.; Amaral De Souza, RA.... (2019). Higher Order Statistics in a mmWave Propagation Environment. IEEE Access. 7:103876-103892. https://doi.org/10.1109/ACCESS.2019.2930931S103876103892

\u3cem\u3eStylosanthes\u3c/em\u3e cv. Campo Grande in Diets of Beef Cattle: Intake and Digestibility of Nutrients and Ruminal Fermentation

Recent studies have shown that it is possible to obtain well-fermented silages from tropical legumes (Heinritz et al., 2012). Souza et al. (2014) concluded that Stylosanthes cv. Campo Grande silage (StS); (Stylosantes capitata + S. macrocephala), when included in the proportion of 50% dietary dry matter (DM), could replace corn silage in diets of feedlot beef cattle without altering intake and performance. However, there is a lack of information about increasing proportion of StS that should be included in diets for beef cattle. Thus, the objective of this study was to evaluate the intake and digestibility of nutrients, and ruminal fermentation of beef cattle fed diets with Stylosanthes and concentrate in different levels

Diversidade genética de matrizes de açaizeiro (Euterpe precatoria) por meio de marcadores microssatélites.

O açaizeiro (Euterpe precatoria) é de origem amazônica e destaca-se entre os diversos recursos biológicos pela sua abundância e por produzir um importante alimento: ?suco de açaí?. A extração dos frutos do açaizeiro retira uma grande quantidade de sementes da floresta e por isso, o uso comercial pode causar perda da diversidade da espécie, podendo resultar em efeitos negativos sobre a estrutura genética das populações. O objetivo do estudo foi analisar a diversidade genética de matrizes de açaizeiro por meio de marcadores microssatélites