scholarly journals Sobrevivência, enraizamento e biomassa de miniestacas de aceroleira utilizando extrato de tiririca

2016 ◽  
Vol 7 (1) ◽  
pp. 133 ◽  
Author(s):  
Francisco Mickael Medeiros Câmara ◽  
Adriano Soares de Carvalho ◽  
Vander Mendonça ◽  
Renan Da Cruz Paulino ◽  
Francisco Ésio Porto Diógenes
Keyword(s):  
Large Scale ◽  
Morphological Characteristics ◽  
Dry Mass ◽  
Seedling Production ◽  
Promising Alternative ◽  
Purple Nutsedge ◽  
Survival Percentage ◽  
Fruit Species ◽  
Destructive Analysis ◽  
System Length

With the need of a large-scale seedling production, the application of purple nutsedge extract may represent a promising alternative, contributing to the fruit species propagation. The aim of this study was to evaluate the effects of nutsedge extract on the survival rate, rooting and biomass of acerola’s mini-cuttings. The experimental design was a completely randomized block, with a 5x2 factorial arrangement (five aqueous purple nutsedge extracts of nutsedge (0%, 25%, 50%, 75% and 100%) and two types of mini-cuttings, a pair of entire leaves and a pair of half leaves) resulting in 10 treatments with 5 repetitions and 8 mini-cuttings per repetition. The evaluations were performed at 75 days after planting, when destructive analysis were carried out for morphological characteristics. The evaluates variables were mini-cuttings survival percentage, percentage of mini-cuttings with sprouts, percentage of mini-cuttings with callus, percentage of minicuttings with roots, root system length, shoot dry mass, root dry mass, total dry biomass and the ratio between shoot and root dry mass. For the experiment conditions, the nutsedge extract positively influenced the survival percentage and percentage of sprouting of acerola’s mini-cuttings, however the extract application did not influence the mini-cuttings biomass of, being the results observed with or without the cut on mini-cuttings leaves.

scholarly journals MORPHOLOGICAL AND PRODUCTIVE CHARACTERIZATION OF FORAGE CACTUS VARIETIES

2015 ◽  
Vol 28 (3) ◽  
pp. 230-238 ◽  
Author(s):  
PHILIPE LIMA DE AMORIM ◽  
JANAINA AZEVEDO MARTUSCELLO ◽  
JOSÉ TEODORICO DE ARAÚJO FILHO ◽  
DANIEL DE NORONHA FIGUEIREDO VIEIRA DA CUNHA ◽  
LIANA JANK
Keyword(s):  
Block Design ◽  
Morphological Characteristics ◽  
Correlation Coefficients ◽  
Dry Mass ◽  
Negative Effects ◽  
Breeding Programs ◽  
Area Index ◽  
Promising Alternative ◽  
Randomized Block Design ◽  
Use Efficiency

ABSTRACT: Cultivars of the genus Nopalea are known in Brazil for being tolerant to cochineal carmine attacks, thus making the cultivation of this genus a promising alternative for mitigating the negative effects of this insect on the production of biomass. With the objectives of characterizing morphologically spineless forage cactus varieties and identify morphological characteristics that may be the focus in spineless forage cactus breeding programs, an experiment was conducted in a completely randomized block design with 11 treatments and four replications. The variety Alagoas showed the highest values of weight, area and volume of cladodes. The varieties Negro Michoacan F7 and V7, Tamazunchale V12 showed the highest values of the cladode area index, the total volume of cladodes and total fresh mass production. The varieties Negro Michoacan V7 and F7 presented the highest water use efficiency and dry mass yield. Cladode volume showed the highest correlation coefficients with the fresh weight of cladodes. Aiming the release of varieties for biomass production, varieties Negro Michoacan F7, V7 and Tamazunchale V12 may substitute the Miúda variety. The number and cladode area index may be used as criteria for selection of superior varieties in breeding programs.

scholarly journals Effects of Cultivation System and Fertilization on Seedling Production of Ocimum basilicum L. and Mentha spicata L.

2015 ◽  
Vol 43 (1) ◽  
pp. 131-137 ◽  
Author(s):  
Anastasia AKOUMIANAKI-IOANNIDOU ◽  
Marina RASOULI ◽  
Lamprini PODAROPOULOU ◽  
Ioannis KARAPANOS ◽  
Dimitrios BILALIS
Keyword(s):  
Cropping Systems ◽  
Cropping System ◽  
Biomass Accumulation ◽  
Ocimum Basilicum ◽  
Seedling Production ◽  
Aromatic Plants ◽  
Mentha Spicata ◽  
Promising Alternative ◽  
Cultivation System ◽  
Survival Percentage

The demand for aromatic plants as ornamentals and sources of essential oils has increased recently. A float system is a promising alternative method of seedling production. Two cropping systems, float and conventional (seed bed), and two nutrient solution formulations, one organic and one inorganic, were evaluated for Ocimum basilicum (basil) and Mentha spicata (spearmint) seedling production. Basil seedlings grown in float system had better or comparable growth of shoots and leaves with those grown in seedbeds, irrespective of the fertilization, whereas spearmint organic fertilization reduced the growth of the aboveground parts of the seedlings, regardless of the cropping system. By contrast, fertilization treatments on both species’ seedling grown in float system showed better root length and higher root biomass accumulation. The survival percentage of seedlings after transplanting, as well as the subsequent growth of plants, were not seriously affected by the cropping system of the fertilization method during transplant production. Overall, we conclude that a float system can be used for the production of Ocimum basilicum and Mentha spicata seedlings under organic or inorganic fertilization.

Efficient Schedule of Energy-Constrained UAV Using Crowdsourced Buses in Last-Mile Parcel Delivery

2021 ◽  
Vol 5 (1) ◽  
pp. 1-23
Author(s):  
Yan Pan ◽  
Shining Li ◽  
Qianwu Chen ◽  
Nan Zhang ◽  
Tao Cheng ◽  
...  
Keyword(s):  
Traffic Congestion ◽  
Large Scale ◽  
Load Capacity ◽  
Scheduling Algorithm ◽  
Cost Effective ◽  
Promising Alternative ◽  
Logistics Industry ◽  
Last Mile ◽  
Delivery Scheduling ◽  
Schedule Approach

Stimulated by the dramatical service demand in the logistics industry, logistics trucks employed in last-mile parcel delivery bring critical public concerns, such as heavy cost burden, traffic congestion and air pollution. Unmanned Aerial Vehicles (UAVs) are a promising alternative tool in last-mile delivery, which is however limited by insufficient flight range and load capacity. This paper presents an innovative energy-limited logistics UAV schedule approach using crowdsourced buses. Specifically, when one UAV delivers a parcel, it first lands on a crowdsourced social bus to parcel destination, gets recharged by the wireless recharger deployed on the bus, and then flies from the bus to the parcel destination. This novel approach not only increases the delivery range and load capacity of battery-limited UAVs, but is also much more cost-effective and environment-friendly than traditional methods. New challenges therefore emerge as the buses with spatiotemporal mobility become the bottleneck during delivery. By landing on buses, an Energy-Neutral Flight Principle and a delivery scheduling algorithm are proposed for the UAVs. Using the Energy-Neutral Flight Principle, each UAV can plan a flying path without depleting energy given buses with uncertain velocities. Besides, the delivery scheduling algorithm optimizes the delivery time and number of delivered parcels given warehouse location, logistics UAVs, parcel locations and buses. Comprehensive evaluations using a large-scale bus dataset demonstrate the superiority of the innovative logistics UAV schedule approach.

scholarly journals Prenatal Nutritional Strategies to Reduce the Risk of Preterm Birth

2021 ◽  
pp. 1-9
Author(s):  
Karen Patricia Best ◽  
Judith Gomersall ◽  
Maria Makrides
Keyword(s):  
Preterm Birth ◽  
Large Scale ◽  
Cochrane Review ◽  
Cost Effective ◽  
Omega 3 ◽  
Promising Alternative ◽  
Nutritional Interventions ◽  
Dietary Nutrients ◽  
Preterm Babies ◽  
Nutritional Strategies

Worldwide, around 15 million preterm babies are born annually, and despite intensive research, the specific mechanisms triggering preterm birth (PTB) remain unclear. Cost-effective primary prevention strategies to reduce PTB are required, and nutritional interventions offer a promising alternative. Nutrients contribute to a variety of mechanisms that are potentially important to preterm delivery, such as infection, inflammation, oxidative stress, and muscle contractility. Several observational studies have explored the association between dietary nutrients and/or dietary patterns and PTB, often with contrasting results. Randomized trial evidence on the effects of supplementation with zinc, multiple micronutrients (iron and folic acid), and vitamin D is promising; however, results are inconsistent, and many studies are not adequately powered for outcomes of PTB. Large-scale clinical trials with PTB as the primary outcome are needed before any firm conclusions can be drawn for these nutrients. The strongest evidence to date for a nutritional solution exists for omega-3 long-chain polyunsaturated fatty acids (LCPUFAs), key nutrients in fish. In 2018, a Cochrane Review (including 70 studies) showed that prenatal supplementation with omega-3 LCPUFAs reduced the risk of PTB and early PTB (EPTB) compared with no omega-3 supplementation. However, the largest trial of omega-3 supplementation in pregnancy, the Omega-3 to Reduce the Incidence of Prematurity (ORIP) trial (<i>n</i> = 5,544), showed no reduction in EPTB and a reduction in PTB only in a prespecified analysis of singleton pregnancies. Exploratory analyses from the ORIP trial found that women with low baseline total omega-3 status were at higher risk of EPTB, and that this risk was substantially reduced with omega-3 supplementation. In contrast, women with replete or high baseline total omega-3 status were already at low risk of EPTB and additional omega-3 supplementation increased the risk of EPTB compared to control. These findings suggest that determining an individual woman’s PUFA status may be the most precise way to inform recommendations to reduce her risk of PTB.

scholarly journals Beyond Newgrange: Brú na Bóinne in the later Neolithic

2021 ◽  
pp. 1-30
Author(s):  
Stephen Davis ◽  
Knut Rassmann
Keyword(s):  
Large Scale ◽  
Morphological Characteristics ◽  
World Heritage ◽  
Geophysical Survey ◽  
World Heritage Site ◽  
Late Neolithic ◽  
Non Invasive ◽  
Heritage Site ◽  
New Evidence

The Brú na Bóinne World Heritage Site, Ireland is best known for its megalithic monuments, in particular the great developed passage tombs of Knowth, Dowth, and Newgrange, and its abundance of megalithic art. However, our understanding of the wider Brú na Bóinne landscape has changed beyond all recognition in the last decade owing to the application of modern, non-invasive survey technologies – in particular LiDAR and large-scale geophysical survey – and most recently as a result of the hot, dry summer of 2018 which revealed a series of remarkable cropmarks between Newgrange and the River Boyne. Despite a lack of excavation it can be argued, based on their morphological characteristics, that many of the structures revealed belong within the corpus of late Neolithic ritual/ceremonial structures, including earthen henges, square-in-circle monuments, palisaded enclosures, and pit/post-alignments. These display both extraordinary diversity, yet also commonality of design and architecture, both as a group and with the passage tombs that preceded them. This paper provides an up-to-date survey of the late Neolithic and presumed late Neolithic landscape of Brú na Bóinne. It provides new evidence and new insights from ongoing survey campaigns, suggesting parallels within the British Neolithic but also insular development within some monument classes.

scholarly journals In Vitro Micropropagation of the Medicinal Plant Physalis angulata L.

2016 ◽  
Vol 8 (2) ◽  
pp. 161-163
Author(s):  
Owk ANIEL KUMAR ◽  
Songa RAMESH ◽  
Sape SUBBA TATA
Keyword(s):  
Large Scale ◽  
Leaf Disc ◽  
Basal Medium ◽  
Shoot Proliferation ◽  
Shoot Multiplication ◽  
Medicinal Herb ◽  
Root Induction ◽  
Survival Percentage ◽  
Physalis Angulata

Physalis angulata L. is an important medicinal herb. An efficient direct adventitious plant regeneration protocol was developed for large scale propagation using leaf disc as explants. The explants were cultured on MS basal medium supplemented with 0.25-3.0 mg/L 6-benzyl amino purine (BAP) for primary shoot proliferation. Inclusion of indole-3-acetic acid (IAA) and gibberellic acid (GA3) in the culture medium along with BAP promoted a higher rate of shoot multiplication. The maximum number of shoots was produced in MS + BAP (1.0 mg/L) + IAA (0.5 mg/L) + GA3 (0.20 mg/L) after the third subculture. An average of 152.8 ± 0.40 shoots were produced from each leaf disc. For root induction the shootlets were transferred to MS medium supplemented with different concentrations of indole-3-butyric acid (IBA). The highest percentage of root induction was observed in 1.0 mg/L (IBA). Rooted plants were successfully established in the soil after hardening. The survival percentage of rooted plants on soil was found to be 85%. This result will facilitate the conservation and propagation of the important medicinal herb Physalis angulata L.

Evaluation of Fuel Preparation Systems for Lean Premixing-Prevaporizing Combustors

1986 ◽  
Vol 108 (2) ◽  
pp. 391-395
Author(s):  
W. J. Dodds ◽  
E. E. Ekstedt
Keyword(s):  
System Design ◽  
Large Scale ◽  
Fuel Injection ◽  
Operating Conditions ◽  
Turbine Engine ◽  
Fuel Injectors ◽  
Design Concepts ◽  
Mixture Preparation ◽  
Design Variables ◽  
System Length

A series of tests was conducted to provide data for the design of premixing-prevaporizing fuel-air mixture preparation systems for aircraft gas turbine engine combustors. Fifteen configurations of four different fuel-air mixture preparation system design concepts were evaluated to determine fuel-air mixture uniformity at the system exit over a range of conditions representative of cruise operation for a modern commercial turbofan engine. Operating conditions, including pressure, temperature, fuel-air ratio, and velocity had no clear effect on mixture uniformity in systems which used low-pressure fuel injectors. However, performance of systems using pressure atomizing fuel nozzles and large-scale mixing devices was shown to be sensitive to operating conditions. Variations in system design variables were also evaluated and correlated. Mixture uniformity improved with increased system length, pressure drop, and number of fuel injection points per unit area. A premixing system compatible with the combustor envelope of a typical combustion system and capable of providing mixture nonuniformity (standard deviation/mean) below 15% over a typical range of cruise operating conditions was demonstrated.

scholarly journals The Effect of Pre-milking Stimulation on Teat Morphological Parameters and Milk Traits in the Italian Water Buffalo

2020 ◽  
Vol 7 ◽  
Author(s):  
Angela Costa ◽  
Massimo De Marchi ◽  
Giulio Visentin ◽  
Maria Concetta Campagna ◽  
Antonio Borghese ◽  
...  
Keyword(s):  
Mammary Gland ◽  
Somatic Cell ◽  
Milk Yield ◽  
Large Scale ◽  
Chloride Concentration ◽  
Morphological Characteristics ◽  
Health Indicators ◽  
Milk Traits ◽  
Manual Stimulation ◽  
The Impact

Water buffaloes (Bubalus bubalis) are very sensitive to environmental stimulus before and during milking, and this explains why disrupted milk ejections due to blood oxytocin level instability are frequent in this species. According to the literature, the manual stimulation (MS) of teats before milking promotes oxytocin release and allows milk ejection to start within 2–3 min. However, the pre-milking stimulation of teats is not always part of the milking routine in Italian buffalo farms; moreover, buffaloes with unstable milk let-down are sometimes treated with exogenous oxytocin (OX). Different types of pre-milking stimulation can impact differently on the mammary gland epithelium and structures and, therefore, on milk yield. In this study, we observed the changes in teat morphological traits before and after the application of three types of stimuli, i.e., no manual stimulation (NS), MS, and OX, in buffaloes reared in an Italian dairy farm. In particular, measurements were available for 23 and 21 buffaloes for front and rear teats, respectively. Subsequently, the effect of the pre-milking stimulation type was estimated on teat morphological characteristics and on milk traits recorded after the application of stimuli. The results showed that the teat canal length was shorter (P &lt; 0.05) after stimulation in the case of MS and OX compared to NS. Cistern diameter was overall greater for MS and lower for OX. On the contrary, teat wall thickness was greater and lower for OX and MS, respectively. Milk yield and quality (fat, protein, and somatic cell score) were similar across the three types of pre-milking stimulation. In perspective, the impact of these types of pre-milking stimulation should be evaluated on a large scale, and the focus might be put on mammary gland epithelium integrity, mastitis incidence, and other udder health indicators in milk, e.g., electrical conductivity, differential somatic cell count, lactose content, and sodium and chloride concentration.

scholarly journals DIELECTRIC ELASTOMER ACTUATOR: NEXT GENERATION FUNCTIONAL MATERIALS FOR INNOVATIVE ROBOTICS

2017 ◽  
Keyword(s):  
Large Scale ◽  
Functional Materials ◽  
Dielectric Elastomer ◽  
Element Analysis ◽  
Promising Alternative ◽  
Robotic Arms ◽  
Soft Actuator ◽  
Computational Dynamics ◽  
Dielectric Elastomer Actuators ◽  
Human Muscles

Conventional actuators based on metal and ceramics face challenges in utilizing them for service and welfare robots, which should work cooperatively with human workers. Dielectric elastomer actuators (DEAs) are a promising alternative to the conventional hard actuators, because they can realize motions which more resemble those of human muscles. Our research aimed at developing a DEA for applications in handling robotic arms and gripper hands for service/welfare robots. To this end, the elements of soft actuator ought to be fabricated and integrated into a large-scale array. Design of the actuator need to be optimized using computational dynamics and Finite Element Analysis (FEA). The application of DEA in robotics is expected to create a drive for the practical realization of reliable and functional DEAs. It could also promote commercialization and tap into the vast potential service/welfare robotic market

scholarly journals Morphological divergence of seedlings Calophyllum brasiliense cambes collected in São Paulo and Tocantins

2021 ◽  
Author(s):  
Ildon Rodrigues Nascimento ◽  
Cândida Pereira da Silva ◽  
Irais Dolores Pascual-Reyes ◽  
Aline Torquato Tavares ◽  
Edilson Nonato da Silva ◽  
...  
Keyword(s):  
Root Length ◽  
Quality Index ◽  
Morphological Characteristics ◽  
Dry Mass ◽  
Sao Paulo ◽  
The State ◽  
Morphological Divergence ◽  
São Paulo ◽  
Calophyllum Brasiliense ◽  
Number Of Leaves

Objective: The objective was to quantify the morphological diversity of Calophyllum brasiliense Cambes from four municipalities of the State of Tocantins employing morphological characteristics, to strengthen information on conservation and future breeding of the species. Methodology: Seeds were collected from four municipalities in the State of Tocantins and one in the State of São Paulo. The following were evaluated: plant height, stem diameter, root length, number of leaves, leaf area, root dry mass, shoot dry mass, total dry mass, and Dickson´s quality index. The data were subjected to univariate analysis of variance, Tocher grouping method, and UPGMA, obtaining a dendrogram through the generalized Mahalanobis distance. Results: The results showed a statistical difference of 1 and 5% probability. Dueré stood out in stem diameter(5.52 mm), Sandolandia in height (34.84 cm) and root length (42.13 cm). Formoso stood out in the number of leaves (34 leaves). Lagoa da Confusão in leaf area (856.28 cm 2 ) and São Paulo in root dry mass (16.20 g), shoot dry mass (12.38 g), total dry mass (16.20 g), and Dickson´s quality index (1.57). Implications: Variations in morphological characteristics can be used as a tool for genetic studies of guanandi progeny accordingto their similarity and/or differences. Conclusions: The morphological divergence evidenced that among the five studied areas it is possible to direct the collection of seeds to subsidize conservation strategies and future breeding of the species.

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