|
|
|
| Registros recuperados: 473 | |
|
|
| Jesus,Priscila Barreto de; Pestana,Edilene Maria dos Santos; Affe,Helen Michelle de Jesus; Rocha,Diogo Souza Bezerra; Caires,Taiara Aguiar; Nunes,José Marcos de Castro; Schnadelbach,Alessandra Selbach. |
| ABSTRACT Hypnea pseudomusciformis was recently described from South America, and has three morphological variants: “musciformis”, “nigrescens”, and “valentiae”. Information on the biology of these variants may help to explain this species’ wide morphological variation despite the absence of genetic divergence among variants. More morphological and ecological data has accumulated on the “musciformis” variant occurring on the Brazilian coast than for the others. In this study, we described the reproductive morphology of a tropical “nigrescens” population and investigated its phenology to provide crucial biological information about this taxon, and perhaps also assist in answering questions about the systematics of H. pseudomusciformis variants. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Cystocloniaceae; Ecology; Hypnea musciformis complex; Reproduction; Systematics. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100067 |
| |
|
|
| Bueno,Norma Catarina; Bicudo,Carlos Eduardo de Mattos. |
| Temporal and spatial variation of Nitella furcata (Roxburgh ex Bruzelius) C. Agardh emend. R.D. Wood subsp. mucronata (A. Braun) R.D. Wood var. mucronata f. oligospira (A. Braun) R.D. Wood were studied at the Ninféias pond (23°38'18.9"S, 46°37'16.3"W), a tropical, shallow, mesotrophic reservoir located in the Parque Estadual das Fontes do Ipiranga Biological Reserve, Municipality of São Paulo, southeast Brazil. Water samples were collected monthly from October/1996 to October/1997 for turbidity, electric conductivity, pH, alkalinity, dissolved oxygen, nutrients, biomass, and algal phenology analysis. Spatial distribution pattern of algal biomass showed that all four sampling stations were similar among themselves during the whole study period. Regarding... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Charophyceae; Biomass; Phenology; Aquatic macrophyte; Nitella. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062006000100001 |
| |
|
|
| Souza,Sthefanie do Nascimento Gomes de; Piedade,Maria Teresa Fernandez; Demarchi,Layon Oreste; Lopes,Aline. |
| ABSTRACT Amazon wetlands are among the most vulnerable ecosystem to be impacted by climate change, which may increase the frequency of extreme droughts and floods. We used Eichhornia crassipes and Pistia stratiotes, two abundant aquatic plants in the Amazon floodplains, to evaluate the effects of combined temperature and [CO2] increase on growth, physiology and ecological interactions. Individual and paired plants were deposited for three weeks in a microcosm under four IPCC scenarios: control (current temperature/CO2), mild (control + 1.5 ºC, 200 ppm CO2), intermediate (control + 2.5 ºC, 450 ppm CO2) and extreme (control + 3.5 ºC, 850 ppm CO2). P. stratiotes died after three weeks in the intermediate and extreme treatments; E. crassipes experienced no... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Competition; Eichhornia crassipes; Pistia stratiotes; Wetlands. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062021005002204 |
| |
|
|
| Detomini, Euro Roberto; USP; Massignan, Luiz Fernando Druzina; USP; Libardi, Paulo Leonel; USP; Dourado Neto, Durval; USP. |
| O objetivo deste trabalho é caracterizar o consumo hídrico do genótipo DKB 390 em condições adequadas de irrigação, tanto para situações de suprimento suficiente quanto para subótimo de nitrogênio. Valores de coeficiente de cultura são também apresentados para diferentes fases, para o primeiro caso, no intuito de prover subsídios teóricos para orçamento de água à cultura e para o manejo da irrigação durante o ciclo. Um experimento de campo foi conduzido durante a estação principal de cultivo, avaliando-se biomassa, área foliar, umidade do solo, dados climatológicos e transmitância de luz, permitindo derivar o balanço hídrico, o consumo hídrico e a eficiência de uso da água. O genótipo mencionado requer por volta de 600 mm para a obtenção de elevadas... |
|
Palavras-chave: 5.01.00.00-9 Agronomia Zea mays; Evapotranspiração; Nitrogênio; Biomassa; KC; Milho Zea mays; Evapotranspiration; Nitrogen; Biomass; Kc; Maize. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/379 |
| |
|
|
| Bonato, Carlos Moacir; UEM; Proença, Gentil Telles de; UEM; Reis, Bruno; UEM. |
| Effects of homeopathic drugs Sulphur and Arsenicum album in growth variables and essential oil content of mint are analyzed. Four homeopathic dinamizations (6, 12, 24 and 30CH) were used for both drugs in the centesimal scale (CH=centesimal hahnemannian), besides control (water). Treatments were conducted in greenhouse and homeopathic drugs applied weekly (250 mL vase-1) for 98 days. Plant height, root system’s dry mass, shoot’s dry mass and essential oil content were determined. Among the tested homeopathy drugs, Sulphur increased values of fresh and dry biomass more than Arsenicum album. Plant height increased by the two drugs and their respective dinamizations. Whereas Sulphur inhibited dry biomass production, except 6CH dinamization, it increased... |
|
Palavras-chave: 5.02.01.07-7 Solos Florestais ultradiluted; Secondary metabolism; Biomass; Homeopathic drugs.. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6642 |
| |
|
|
| Borsari, Raquel Renan Jorge; Universidade Estadual de Londrina; Buzato, João Batista; UEL; Silva, Rui Sérgio dos Santos Ferreira da; UEL; Celligoi, Maria Antonia Pedrini Colabone; UEL. |
| The effect of the variables pantothenic acid, yeast extract and sodium chloride, as well as the cell permeabilization technique, were investigated on the formation of levan, ethanol, sorbitol and biomass of Zymomonas mobilis, using a 24-1 fraction factorial design. Cell growth was determined by turbidimetry at 605 nm, relating it to a biomass with a dry weight calibration curve. Reducing sugars were quantified according to Somogyi and Nelson. Total sugars were quantified by the phenol-sulfuric acid method, sorbitol by HPLC and ethanol. The levan produced was precipitated by the addition of absolute ethanol and quantified in fructose units. In levan biosynthesis, the variable that had the largest contribution was cell condition. The results suggested that... |
|
Palavras-chave: 2.08.02.00-5; 2.12.02.02-8 Zymomonas mobilis; Fermentation; Biomass; Substrate; Sorbitol; Levan Bioquímica dos microrganismos; Microbiologia industrial e de fermentação Zymomonas mobilis; Fermentation; Biomass; Substrate; Sorbitol; Levan. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1519 |
| |
|
|
| Brito, Selma Freire de; Pinheiro, Charles Lobo; Nogueira, Francisco Carlos Barboza; Medeiros Filho, Sebastião; Matos, Dalva Maria da Silva. |
| The invasion by Cryptostegia madagascariensis causes economic and environmental problems in Northeastern Brazil. Current study evaluates the initial growth of C. madagascariensis on light gradient. The experiment used 0, 30, 50 and 70% shading treatments arranged in a completely randomized design and evaluated in four periods, namely, 35, 50, 65 and 80 days. Height, absolute growth rate, relative growth rate, number of side branches, number of leaves, leaf area, specific leaf area, leaf area ratio, root mass ratio, stem mass ratio, leaf mass ratio and leaf area/root mass ratio were evaluated. Results showed that the height was greater in shade environments, and the greater the available light, the greater was the number of side branches. C.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Functional traits; Caatinga; Shading; Morphological adjustments; Biomass. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28179 |
| |
|
| |
|
|
| YUNUSA, SULEIMAN USMAN. |
| An improved natural-draft double burner biomass cookstove was developed. The study became imperative to minimize the increasing rate of deforestation, harmful gas accumulation as well as excessive fuel consumption and heat loss experienced in the use of the inefficient and traditional cooking method. The study was conducted in the Department of Agricultural and Bio-resources Engineering, Ahmadu Bello University, Zaria, Nigeria. The cookstove was designed based on performance, affordability, and usability, and it was constructed purely from locally available materials. Stainless steel was used to construct the stove cladding; it possesses lesser thermal conductivity of 14.9 W/mk as compared to aluminum and mild steel which have 174.6 W/mk and 80.2 W/mk,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Cookstove; Traditional; Improved; Natural-draft. |
| Ano: 2022 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7279 |
| |
|
|
| Sornpoon, Wlaiwan; Jayasuriya, Hemantha P. W.. |
| The tillage and residue management during soil bed preparation need to be in appropriate manner for sustainable farming practice. The effects of tillage and residue management methods on corn cropping were studied on loamy soil in Bangrakum district, Phitsanulok Province, Thailand. The effects of five commonly used tillage methods: subsoiler tillage (ST), three methods of conventional tillage (CT1, CT2 and CT3), no-tillage (NT), as main factors and two corn residue management methods; burned (R1) and unburned (R2), as sub-factors were studied in a randomized strip plot configuration. Tillage treatment showed significant effect on physical and chemical soil properties, plant growth and development, grain yield, total aboveground biomass and most... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural Engineering; Tillage optimization Tillage; No-tillage; Emergence; Compaction; Subsoiler; Biomass. |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2235 |
| |
|
|
| Orisaleye, Ifeoluwa; Ojolo, Sunday. |
| The study of compaction or solids conveying in a screw extruder has been carried out majorly on the straight screws using the plug flow analysis. Despite this, the analysis of the straight screw appears to be complex as contained in existing literatures based on the force and torque balance. The tapered screw, which is considered to be an effective option for biomass compaction, introduces greater complications because the geometry is constantly changing. In this study, a method based on the traction and retardation mechanism of friction is developed for a fully unwound screw channel utilizing only the force balances. The procedure has been used to carry out a parametric analysis of the tapered screw extruder for a screw press biomass briquetting machine.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass Energy; Machinery Development plug flow; Biomass; Extruder; Analysis. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3220 |
| |
|
| |
|
|
| Maga, Juraj. |
| The paper is focused on the study and evaluation of quality of the seeding of seeds and its effect on the biomass yield. The aim was to evaluate the space arrangement of the seeds by using of polygon method on one field with the repetition for different forward speeds of the drill machine - 10, 12, 14, 16 a 18 km.h-1. Field experiments have been conducted with the drill machine with continuous seeding TUME NOVA COMBI 3000 having a double-disc seeding unit. Within the experiments there was used winter wheat, variety Magisters, with seeding rate 220 kg per ha. For the evaluation there were used digital photographs, which were taken during repeated measurements of the each value of the forward speed after sprouting of crop. These images have been used in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seeder; Sowing quality; Biomass; Operating speed. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3083 |
| |
|
| |
|
| |
|
|
| UDOMSUP, JANYA. |
| This work presents a study for biomass possible to bring renewable energy in a swirling fluidized bed combustor (SFBC). The main objective of this experimental work was to study the biomass component and excess air of biomass. Palmyra palm shell, Leucaena (lam.), and Water hyacinth are using as fuel in the tests. Quartz sand of 600-850 µm and static bed height of 20 cm was used as inert bed material. For all of tests, the feed rate was fixed 45 kg/hr. for variable excess air (of 40 60 and 80%). As the experimental results, the temperature profiles in SFBC were obviously seen deviate when tests with higher excess air. In the test run, the highest cellulose (palmyra palm shell) for 80% excess air had CO and NO emissions were found in quite stable level (less... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Biomass Component; Efficiency; Emission; Fluidized-bed; Combustion; Swirling. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5945 |
| |
|
|
| Bernard, Kivumbi. |
| This study was aimed at assessing the techno-economic potential of municipal solid waste (MSW) generated in Kampala City for electricity production through gasification. The quantity, characteristics and gasification parameters were determined. In addition, the gasifier- engine system components were sized, and an economic analysis was conducted to obtain the net present value (NPV) and the payback period. This study found that 523 t/d of MSW is collected in Kampala City. The biomass component of MSW was found to be 459.5 t/d with moisture content of 71.09% on as-received basis. The physical characteristics of the gasified biomass included 11.8% moisture content, 88.2% total solids, 25.9% ash content and 57.7 kg/m3 bulk density. The resulting normalized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Municipal solid waste; Biomass; Gasification; Economic analysis; Producer gas; Electricity. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3363 |
| |
|
|
| Costa, Corrado; Sperandio, Giulio; Verani, Stefano. |
| Agricultural biomass supply chain consisting of multiple harvesting, storage, pre-processing, and transport operations. This network operates in space and time coordinates and produces empirical data used for many purposes, including wood-flow planning, harvesting cost calculation and work rate setting. The aim of this study was to explore and propose the use of a multivariate approach, namely, the Partial Least Squares (PLS) multivariate regression approach and compare its performance with the commonly used Ordinary Linear Regression (OLS). In particular, the study aimed at comparing the main statistical significance of indicators attributed to models calculated with OLS and PLS regressions from the same original datasets, for the purpose of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Harvesting; Biomass; Logistics; Machine costs; Multivariate statistics; Ordinary linear regression; Partial least square. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2910 |
| |
|
|
| Ohagwu, Chukwuemeka; Nwakaire, joel; Amaefule, Desmond; Anyanwu, Cosmas; Nwaezeh, Chiadikobi. |
| Various physicomechanical, and fuel properties of sawdust briquettes with Abelmoschus esculentus (okra) waste binder additive were determined. Elemental analysis was done to determine the oxygen (O), hydrogen (H), and carbon content of the briquettes. Volatile matter, ash content, fixed carbon, heating value, density, compressive strength, stability, durability, and shatter resistance. 5%, 10%, 15%, and 20% Abelmoschus esculentus composition per weight of the biomass were used. The 5% Okra briquette had the highest volatile matter and heating value of 85.46% and 17.82 MJ/kg, while maintaining the lowest ash content and moisture content of 1.59% and 7.6%, respectively. The briquette with 5% Abelmoschus esculentus (Okra) composition had the highest carbon... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abelmoschus esculentus; Briquette; Specific fuel consumption; Binder; Biomass. |
| Ano: 2022 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7121 |
| |
|
|
| Flores, Edgar Dulay. |
| Biomass furnace ash (BFA) generated from drying of grains in mechanical dryers were blended with cement in varying ratio of 1:4, 1:5, 1:6, 1:7 and 1:8 by volume. Each composition was cured in an ambient condition for 7, 14 and 28 days and determined their properties such as density, porosity, compressive strength and thermal shock resistance. Cold crushing strength increased with increasing cement content and curing time. Likewise, density increased with increasing cement content and curing time while porosity showed the other way. All the sample compositions exceeded 30 cycles without any crack when subjected to thermal shock resistant cycles of heating and cooling using a firing temperature of 1000oC in an electric muffle furnace. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Rice husk; Ash; Furnace; Mechanical dryer. |
| Ano: 2017 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3944 |
| |
| Registros recuperados: 473 | |
|
|
|
