scholarly journals CHARACTERIZATION OF NEOSSOLOS REGOLÍTICOS (PSAMMENTS) THROUGH A PLUVIOMETRIC GRADIENT IN BRAZILIAN SEMIARID

2021 ◽  
pp. 147-165
Author(s):  
Sebastiana Maely Saraiva ◽  
Vânia da Silva Fraga ◽  
José Coelho de Araújo Filho ◽  
Roseilton Fernandes dos Santos ◽  
Bruno de Oliveira Dias ◽  
...  
Keyword(s):  
Brazilian Semiarid

scholarly journals Impact of spineless cactus cultivation (O. Ficus-indica) on the thermal characteristics of soil

2018 ◽  
Vol 13 (1) ◽  
pp. 1
Author(s):  
Willames De Albuquerque Soares
Keyword(s):  
Heat Capacity ◽  
Thermal Characteristics ◽  
Thermal Characterization ◽  
Biological Processes ◽  
Volumetric Heat Capacity ◽  
Average Value ◽  
Brazilian Semiarid ◽  
Cultivation Techniques ◽  
Soil Changes

Temperature is a fundamentally important factor for understanding the physical, chemical, and biological processes that occur in soil. However, there are few studies in the Brazilian semiarid zone that seek to understand how soil degradation affects its thermal characteristics. The objective of this study was to evaluate the influence of cultivation techniques on the thermal characterization of soil, using the model proposed by Johansen. The study was conducted in the Agreste region of the state of Pernambuco, Brazil on two plots of land, one with native vegetation (Caatinga) and the other with spineless cactus (O. ficus - indica). It was observed that the procedures used to prepare the soil for cultivation of spineless cactus caused a reduction in the capacity to transmit the surface temperature to the interior of the soil. Changes in the physical properties of the soil required for cultivation resulted in a reduction in the average value of the volumetric heat capacity of about 22%; an increase of approximately 5% in the average volumetric heat capacity and a 26% increase in the thermal diffusivity of the soil, as well as a reduction of approximately 50% in the heat flux from the surface of the soil.

scholarly journals AGRONOMIC AND MORPHOLOGICAL CHARACTERIZATION OF LIPPIA (VERBENACEAE) SPECIES NATIVE FROM BRAZILIAN SEMIARID REGION

2017 ◽  
Vol 92 (2) ◽  
pp. 147
Author(s):  
Ariana Reis Messias Fernandes de Oliveira ◽  
Lenaldo Muniz Oliveira ◽  
José Floriano Barea Pastore ◽  
Tânia Regina dos Santos Silva ◽  
Larissa Correa do Bonfim Costa
Keyword(s):  
Essential Oil ◽  
Agronomic Traits ◽  
Morphological Characterization ◽  
Semiarid Region ◽  
Brazilian Semiarid ◽  
Aromatic Species ◽  
Morphological Differences ◽  
Stem Leaf ◽  
Essential Oil Yield

The genus Lippia L. is represented by several aromatic species, producing essential oils with biological activity, especially antimicrobial.  The semiarid region of Bahia contains several Lippia species that could be economically exploited. This study aimed to characterize morphological and agronomic traits of four species of Lippia native of the semiarid region. The species were collected in a number of cities of the state of Bahia. The experimental design was performed in randomized blocks with four repetitions and four plants per repetition for each species. We conducted quantitative and qualitative morphological characterizations, and evaluated the characters of stem, leaf and inflorescence; in addition to the agronomic characterization, with the fresh and dry matter of inflorescences, we evaluated leaves and stem and essential oil content and yield. The results showed morphological differences between the species for all traits evaluated, except for the number of flowers per inflorescence. The agronomical characterization showed differences for all measured characters, and the species Lippia lasiocalycina was distinguished by the essential oil yield.

scholarly journals Agronomic characterization of forage grain crops

2016 ◽  
Vol 7 (2) ◽  
pp. 192
Author(s):  
Eranildo Brasil da Silva ◽  
Maria Socorro de Souza Carneiro ◽  
Flávia Louzeiro de Aguiar Santiago ◽  
Ricardo Loiola Edvan ◽  
Leilson Rocha Bezerra ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Crude Protein ◽  
Dry Matter ◽  
Forage Crops ◽  
Mineral Contents ◽  
Arid Conditions ◽  
Brazilian Semiarid ◽  
Forage Species ◽  
Semiarid Conditions

The aim of this research was to accomplish agronomic and chemical composition of four forage species under the Brazilian semiarid conditions . The experimental design was a randomized block, in which the treatments consisted of forage crops: corn cv. BRS 205, millet cv. BRS 1501, sorghum cv. IPA 467-4-2 and sunflower cv. Catissol 01, with four repetitions. It was measured plant height (m2), number of plants, leaf/stem ratio, dry matter percentage, total dry matter and the chemical composition of different forage species. The sorghum showed a greater growth, reaching a height of 270.90 cm. For the leaf/stem ratio, the best results were observed by corn, followed by sunflower. In the chemical composition, the sunflower stood out compared to the other materials for crude protein, lipids and mineral contents. Sorghum present greater growth and mass production of straw for the Brazilian semi-arid conditions. The studied species have appropriate chemical composition characteristics, except for sunflower that has high ether extract contents.

scholarly journals Characterization of NEOSOLS through a pluviometric gradient in brazilian Semiarid / NEOSSOLOS Regolíticos em um gradiente pluviométrico no Semiárido brasileiro

2021 ◽  
Vol 4 (2) ◽  
pp. 2066-2082
Author(s):  
Sebastiana Maely Saraiva ◽  
Vânia da Silva Fraga ◽  
José Coelho de Araújo Filho ◽  
Roseilton Fernandes Dos Santos ◽  
Bruno de Oliveira Dias ◽  
...  
Keyword(s):  
Soil Samples ◽  
Natural Fertility ◽  
Humid Zone ◽  
Brazilian Semiarid ◽  
Dry Soil

There is still little information about Neossolos Regoliticos ( Neosols) , therefore, generating information about fertility, genesis and mineralogy is important to define the proper use and management. The work aimed to characterize morphologically, physically, chemically and mineralogically three Neossolos Regoliticos (Neosols)  along a pluviometric gradient (400 mm; 400 and 600; 600 mm). For this purpose, trenches were opened, where the description and collection of soil samples proceeded. It was not possible to notice rainfall interference in the differentiation of horizons and depth of soils. However, increased clay contents from very dry soil to the sub-humid zone, showing the influence to rainfall that is also reflected in the natural fertility of Neossolos Regoliticos (Neosols)

scholarly journals Characterization of the Sheep Farming System in the Brazilian Semiarid from the Multivariate Perspective

2020 ◽  
Vol 15 (3) ◽  
pp. 185-197
Author(s):  
Janaina Kelli Gomes Arandas ◽  
�ngelo Giuseppe Chaves Alves ◽  
Olivardo Fac� ◽  
Ernandes Barboza Belchior ◽  
Luciana Shiotsuki ◽  
...  
Keyword(s):  
Farming System ◽  
Brazilian Semiarid

scholarly journals Inhibition of Pancreatic Lipase and Characterization by Extracts From Fruit Pomaces Cultivars Grown in Brazilian Semiarid

2019 ◽  
Vol 7 (2) ◽  
pp. 343
Author(s):  
Josileide Gonçalves Borges ◽  
Jackson Roberto Guedes da Silva Almeida ◽  
Juliana Anielle Ribeiro De Sá ◽  
Kaline Stela Pires Bezerra ◽  
Patricia Kauanna Fonseca Damasceno ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Pancreatic Lipase ◽  
Total Phenolics ◽  
Punica Granatum ◽  
Total Phenolic ◽  
Brazilian Semiarid ◽  
Phytochemical Compounds ◽  
Fruit Pomace ◽  
Punica Granatum L

Investigate action of pancreatic lipase inhibition and characterization of extracts obtained from fruit pomace cultivars grown in Brazilian semiarid. Phytochemicals of Vitis labrusca, Passiflora edulis flavicarpa Deg., Citrus sinensis L Osbeck, and Punica granatum L. were extracted by maceration in a hydroethanolic solution. Inhibition activity of pancreatic lipase was performed by ELISA reader. To identify which compounds would probably be responsible for inhibitory activity, extracts were characterized by method of total phenolics using folin ciocalteau, phenolic acids and flavonoids were identified by HPLC, antioxidant potential was quantified by DPPH. With exception of pomegranate seed, all other pomace showed potential for inhibition of lipase. However, V. labrusca had higher percentage of inhibition (89.74%), this percentage similar to that obtained by commercial orlistat inhibitor, which would indicate its use as an efficient inhibitor. For all extracts were found several phytochemical compounds with phenolic characteristics, however, pomaces of P. granatum peel and V. labrusca showed best results in total phenolic and antioxidant activity. P. granatum peel had a high content of total phenolics (82.50 EAG g-1) and the best antioxidant activity (IC50 = 1.47 µg mL-1). All pomace extracts showed varied secondary metabolites, although antioxidant activity from grape and passion fruit pomaces showed potential for inhibition of lipids absorption.

scholarly journals Genetic characterization of Curraleiro Pé-Duro bovine breed from a conservation herd of Brazilian semiarid

2014 ◽  
Vol 13 (1) ◽  
pp. 2149-2154
Author(s):  
E. Silva Filho ◽  
M.H. Silva ◽  
J.E.G. Campelo ◽  
M.R. DeRosia ◽  
L.M.L. Pinheiro ◽  
...  
Keyword(s):  
Genetic Characterization ◽  
Brazilian Semiarid

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

AEM analysis of crystallization in Ti-based amorphous alloys

1983 ◽  
Vol 41 ◽  
pp. 270-271
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
Isothermal Annealing ◽  
Amorphous Matrix ◽  
Nucleation And Growth ◽  
Current Interest ◽  
Amorphous Films ◽  
Electrical And Magnetic Properties

Amorphous materials are of current interest due to their desirable mechanical, electrical and magnetic properties. Furthermore, crystallizing amorphous alloys provides an avenue for discerning sequential and competitive phases thus allowing access to otherwise inaccessible crystalline structures. Previous studies have shown the benefits of using AEM to determine crystal structures and compositions of partially crystallized alloys. The present paper will discuss the AEM characterization of crystallized Cu-Ti and Ni-Ti amorphous films.Cu60Ti40: The amorphous alloy Cu60Ti40, when continuously heated, forms a simple intermediate, macrocrystalline phase which then transforms to the ordered, equilibrium Cu3Ti2 phase. However, contrary to what one would expect from kinetic considerations, isothermal annealing below the isochronal crystallization temperature results in direct nucleation and growth of Cu3Ti2 from the amorphous matrix.

Characterization of Coherent, Ordered Precipitates in Nickel-Base Alloys

1973 ◽  
Vol 31 ◽  
pp. 144-145
Author(s):  
B. H. Kear ◽  
J. M. Oblak
Keyword(s):  
Stable Phase ◽  
Nickel Base Superalloy ◽  
Alloy 718 ◽  
Commercial Alloy ◽  
Precipitate Morphology ◽  
Continuous Precipitation ◽  
Nickel Base ◽  
Base Superalloy ◽  
Strengthening Precipitate

A nickel-base superalloy is essentially a Ni/Cr solid solution hardened by additions of Al (Ti, Nb, etc.) to precipitate a coherent, ordered phase. In most commercial alloy systems, e.g. B-1900, IN-100 and Mar-M200, the stable precipitate is Ni3 (Al,Ti) γ′, with an LI2structure. In A lloy 901 the normal precipitate is metastable Nis Ti3 γ′ ; the stable phase is a hexagonal Do2 4 structure. In Alloy 718 the strengthening precipitate is metastable γ″, which has a body-centered tetragonal D022 structure.Precipitate MorphologyIn most systems the ordered γ′ phase forms by a continuous precipitation re-action, which gives rise to a uniform intragranular dispersion of precipitate particles. For zero γ/γ′ misfit, the γ′ precipitates assume a spheroidal.

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