Consulta: subjectFacets:"Volatile fatty acids"
Registros recuperados: 18
Data/hora: 02/06/2024 08:31:29

Digestibilidad in vitro de dietas energéticas para ovinos con inclusión de semilla de girasol.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Herrera Pérez, Jerónimo.
Cinco dietas integrales isoenergéticas e isoprotéicas fueron evaluadas con el objetivo de medir la producción de gas in vitro y asociarla con la digestibilidad de la materia seca en dietas para corderos elaboradas con 0, 3, 6, 9 y 12 % de inclusión de semilla de girasol. Se midió la producción de gas in vitro (PGSIV) (volumen máximo de gas (Vmax; mL g-1) para materia seca (MS), materia orgánica (MO) y materia seca degradada (MSD), la digestibilidad in vitro de la MS (DIVMS), y producción de ácidos grasos volátiles (AGV) a las 6, 12, 24, 48 y 72 h de incubación. El diseño experimental fue completamente al azar con bloques generalizados utilizando el procedimiento MIXED del SAS. Se realizaron polinomios ortogonales para probar el efecto lineal y cuadrático...
Palavras-chave: Acidos grasos volátiles; Producción de gas; Oleaginosas; Volatile fatty acids; Gas production; Oilseeds; Ganadería; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/1952

Methanogenic toxicity evaluation of chlortetracycline hydrochloride
Provedor de dados: Electronic Journal of Biotechnology
Autores: Reyes-Contreras,Carolina; Vidal,Gladys.
Background Anaerobic digestion is a technology applied successfully to converting organic matter into biogas. However, the presence of inhibitory compounds such as antibiotics can adversely affect methane production. The aim of this study is to evaluate the toxic effect of chlortetracycline hydrochloride (CLOR) on the methanogenic bacteria. In order to study the methanogenic toxicity of CLOR, different concentrations of CLOR (10, 50, 100, 200 mg L- 1) were evaluated by methanogenic toxicity assays using three feedings. Results Maximum methane production was obtained for the assays with 10 mg CLOR L- 1, the values obtained were 277 ± 4.07; 193 ± 11.31 and 166 ± 7.07 mL for the first, second and third feedings, respectively. The average values for acetic,...
Tipo: Journal article
Palavras-chave: Antibiotics; Anaerobic batch assay; Bacterial inhibition; Volatile fatty acids.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000600010

Effect of temperature on the anaerobic digestion of palm oil mill effluent
Provedor de dados: Electronic Journal of Biotechnology
Autores: Choorit,Wanna; Wisarnwan,Pornpan.
Two continuous stirred tank reactors (CSTRs) each fed with palm oil mill effluent (POME), operated at 37ºC and 55ºC, respectively, were investigated for their performance under varies organic loading rates (OLRs). The 37ºC reactor operated successfully at a maximum OLR of 12.25 g[COD]/L/day and a hydraulic retention time (HRT) of 7 days. The 55ºC reactor operated successfully at the higher loading rate of 17.01 g[COD]/L/day and had a HRT of 5 days. The 37ºC reactor achieved a 71.10% reduction of chemical oxygen demand (COD), a biogas production rate of 3.73 L of gas/L[reactor]/day containing 71.04% methane, whereas the 55ºC reactor achieved a 70.32% reduction of COD, a biogas production rate of 4.66 L of gas/L[reactor]/day containing 69.53% methane. An OLR...
Tipo: Journal article
Palavras-chave: Hydraulic retention times; Mesophilic reactor; Methane; Organic loading rate; Temperature variations; Thermophilic reactor; Volatile fatty acids.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000300005

Use of volatile fatty acids salts in the production of xanthan gum
Provedor de dados: Electronic Journal of Biotechnology
Autores: Correa Leite,José Alberto; Pozzi,Eloiza; Pelizer,Lúcia Helena; Zaiat,Marcelo; Barboza,Marlei.
Background: The aim of this study was the production of xanthan gum from salts of volatile fatty acids, which can be generated in anaerobic processes for the production of hydrogen from organic wastewaters. Xanthan gum was produced with three different acid salts used to replace the traditional citrate, which is normally used in the culture for the production of this biopolymer. The volatile fatty acids (VFA) salts used were sodium acetate 0.0328 M, sodium propionate 0.0219 M, and sodium butyrate 0.0164 M. Results: The values of biomass yield, (Yp/x) obtained were 9.2 g/g for acetate, 11.78 g/g for citrate, 11.80 g/g for butyrate and 14.59 g/g for propionate, while the values of the product yield (Yp/s), were 0.92; 0.59; 0.71 and 0.72 for acetate, citrate,...
Tipo: Journal article
Palavras-chave: Rheology; Volatile fatty acids; Xanthan gum.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000200006

Intake and digestibility of lamb fed diets containing banana crop residues
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Carmo,Tânia Dayana do; Barbosa,Paula Miranda; Geraseev,Luciana Castro; Costa,Diego Santana; Seles,Geziana Moreira; Duarte,Eduardo Robson.
Abstract: The objective of this work was to evaluate the effects of the inclusion of banana leaf or pseudostem hay in complete diets on the intake, nutrient digestibility, and ruminal short-chain fatty acid production by lambs. A total of 30 Santa Inês x Dorper lambs were allocated to five treatments: 400 g kg-1 Cynodon spp. hay; 200 g kg-1 banana leaf hay + 200 g kg-1 Cynodon spp. hay; 400 g kg-1 banana leaf hay; and 200 g kg-1 banana pseudostem hay + 200 g kg-1 Cynodon spp. hay and 400 g kg-1 banana pseudostem hay. The inclusion of banana crop residues had no effect on dry matter intake, organic matter, crude protein, neutral detergent fiber (NDF), acid detergent fiber, non-fiber carbohydrates, and total carbohydrates, which presented averages of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Musa; By-product; Hay; Nutritional value; Volatile fatty acids.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000200197

Evaluation of Aluminum Chloride As an Effective Short-Term Solution for Reducing Odor - Causing Volatile Fatty Acids in Duck Litter
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Chung,TH; Park,JH; Kim,CM; Choi,IH.
ABSTRACT This study evaluated the effects of aluminum chloride (AlCl3) on pH and volatile fatty acid levels in duck litter over the course of a three-week experimental period. Ninety one-day-old Pekin ducks (45 males and 45 females) were distributed into three treatments with three replicates each (10 ducks per replicate) using a completely randomized design. Two treatments were top-dressing duck litter with thin layers (1-2 cm) of 50 g or 100 g of AlCl3 per kg of litter, respectively; the control group received no litter treatment. Although no significant differences in propionic acid levels (p&gt;0.05) were observed in any of the treatments, overall pH values for the 50 g and 100 g AlCl3 treatments were both lower (p&lt;0.05) than those of the control...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aluminum chloride; PH; Volatile fatty acids; Duck litter.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000300545

Fermentation parameters, quality and losses in sugarcane silages treated with chemical additives and a bacterial inoculant
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Pedroso,André de Faria; Rodrigues,Armando de Andrade; Barioni Júnior,Waldomiro; Souza,Gilberto Batista de.
The objective of this trial was to evaluate chemical additives and a bacterial inoculant on the inhibition of alcoholic fermentation and reduction of losses in sugarcane silages. Treatments were (doses on a fresh forage basis): without additive (control); urea (10 g/kg); urea (5 g/kg) + sodium benzoate (0.5 g/kg); sodium benzoate (1 g/kg); urea + ammonium sulfate in a 9:1 relation (10 g/kg); Lactobacillus buchneri (5 × 10(4) cfu/g). Silages were produced in 10.16- × 30-cm PVC tubes, provided with tight lids adapted with Bunsen valves for gas losses quantification. Minisilos were opened 139 days after ensiling. Ethanol content (227 g/kg dry matter - DM) and total DM loss (30%) were high in the control silage. All additives, except benzoate, decreased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ammonium sulfate; Ethanol; L. buchneri; Sodium benzoate; Urea; Volatile fatty acids.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001100006

Effect of the dietary level of cull pinto beans (Phaseolus vulgaris) on ruminal fermentation, kinetics, and digestibility of hair lambs
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Castillo Rangel,Francisco; Villalobos Villalobos,Guillermo; Domínguez Díaz,David; Ortega Gutiérrez,Juan Ángel.
ABSTRACT The objective was to evaluate the effect of three levels of cull pinto beans (CPB; Phaseolus vulgaris) on ruminal fermentation, kinetics, and nutrient digestibility in hair lambs. Six cannulated lambs averaging 56.6±3.8 kg were used and were randomly assigned to one of three treatments. Treatments were: 0.0 kg kg−1 of CPB in the supplement (control); 0.25 kg kg−1 of CPB in the supplement (CB25); and 0.40 kg kg−1 of CPB in the supplement (CB40). Dry matter intake, ruminal pH, NH3, and volatile fatty acid (VFA) concentration, methane production, Kp (passage rate), MRT (mean retention time), and digestibility of dry matter, crude protein, and neutral detergent fiber were evaluated. Data were analyzed in a Latin square design, repeated in line, by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ammonia; Legumes; Methane; Ruminal pH; Sheep; Volatile fatty acids.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000500405

New inoculants on maize silage fermentation
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Assis,Fábia Giovana do Val de; Ávila,Carla Luiza da Silva; Pinto,José Cardoso; Schwan,Rosane Freitas.
The objective of this study was to evaluate the effect of bacterial inoculants at two inoculation rates on chemical and biological characteristics of maize silage. The treatments consisted of two inoculating rates (5 and 6 log cfu g-1of forage) for each strain of lactic acid bacteria (LAB) identified as Lactobacillus buchneri, L. hilgardii, or L. plantarum. The maize was ensiled in experimental PVC silos. Samples were taken for the determination of the contents of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), water-soluble carbohydrates (WSC), organic acids and alcohols, for the evaluation of the populations of lactic acid bacteria, yeasts, filamentous fungi, and for the determination of pH values during ensilage and after 30 or 90...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Filamentous fungi; Inoculation; Lactic acid bacteria; Volatile fatty acids; Yeasts.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000800395

Effects of supplementation frequency on the ruminal fermentation and enteric methane production of beef cattle grazing in tropical pastures
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Canesin,Roberta Carrilho; Berchielli,Telma Teresinha; Messana,Juliana Duarte; Baldi,Fernando; Pires,Alexandre Vaz; Frighetto,Rosa Toyoko Shiraishi; Fiorentini,Giovani; Reis,Ricardo Andrade.
The objective of this study was to evaluate the characteristics of ruminal fermentation and enteric methane production in beef cattle subjected to different supplementation frequencies while grazing on Brachiaria brizanthacv. Marandu pastures. Nine cattle (325±65.7 kg BW) fitted with ruminal and duodenal cannulas were used in the ruminal fermentation study, and 12 cattle (399±32.6 kg BW) were used in the enteric methane production study. The treatments included supplementation once daily, supplementation once daily except Saturdays and Sundays, or supplementation on alternate days. The supplementation was equivalent to 10 g kg−1 BW day−1 for all treatments. The design employed was completely randomized with three treatments and three replications. When all...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacterial N synthesis; N-alkane; Nutrient intake; Ruminal methane; Tropical pasture; Volatile fatty acids.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014001100590

In vitro study of postbiotics from Lactobacillus plantarum RG14 on rumen fermentation and microbial population
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Izuddin,Wan Ibrahim; Loh,Teck Chwen; Samsudin,Anjas Asmara; Foo,Hooi Ling.
ABSTRACT An in vitro study was carried out to identify the effects of different inclusion levels of postbiotics from Lactobacillus plantarum RG14 on rumen fermentation profiles, gas production kinetics, and microbial population in rumen fluid collected from goats. Postbiotics were added at different levels (0, 0.3, 0.6, 0.9, and 1.2%) and incubated for 72 h with 200 mg dry matter (DM) of a substrate containing 60% Guinea grass and 40% commercial concentrate. The experiment was conducted in triplicate on different days with four replications per treatment. Rumen fermentation kinetics, pH, organic matter digestibility (OMD), volatile fatty acids (VFA), and microbial populations were investigated. Net gas production and gas production from the immediate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed additive; Fermentation profile; Lactobacillus; Ruminal kinetics; Rumen microorganisms; Volatile fatty acids.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100607

Fermentation characteristics and in vitro ruminal digestion of yacon residue silage with lactic acid bacteria inoculant or beet pulp
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Wang,Lichao; Guan,Lihui; Fang,Jiachen; Cai,Yimin; Cao,Yang.
ABSTRACT In this study, we examined the effects of lactic acid bacteria (LAB) inoculant and beet pulp (BP) on the quality of yacon (Smallanthus sonchifolius) residue silage. Yacon silage was prepared using a small-scale system of silage fermentation, and the treatments were as follows: control silage without any additive and silages with LAB inoculant Chikuso-1 (Lactobacillus plantarum, 5 mg/kg, fresh matter basis), BP (30% fresh matter basis), and LAB+BP. Silages were opened on days 3, 5, 7, 15, 30, and 60 of fermentation. The chemical composition, organic acid content, and in vitro ruminal digestion of the 60-day silage were determined. The pH of LAB-treated silage was lower than that of the silage without LAB. Furthermore, the LAB-treated silage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dry matter digestibility; Microorganism; Silage; Volatile fatty acids; Yacon.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100714

Rumen fermentation and rumen microbes in Nellore steers receiving diets with different lipid contents
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Messana,Juliana Duarte; Berchielli,Telma Teresinha; Arcuri,Pedro Braga; Reis,Ricardo Andrade; Canesin,Roberta Carrilho; Ribeiro,Andressa Ferreira; Fiorentini,Giovani; Fernandes,Juliano José de Resende.
The objective of the present study was to evaluate the effects of dietary lipid content (20, 40 and 60 g/kg dry matter) on intake, total and ruminal apparent digestibility of dry matter (DM), nutrient digestibility, rumen fermentation parameters, microbial synthesis efficiency and rumen microbial content of beef cattle. Nine cannulated steers at 6 months of age with initial body weight of 232±35 kg were used in a triplicate 3 × 3 Latin square design. The results indicated that the total intake and digestibility of DM, organic matter (OM), gross energy (GE), neutral detergent fiber (NDF) and acid detergent fiber (ADF) were not affected by the lipid content of the diet. However, the lowest lipid content diet reduced the total digestibility of crude protein...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bovines; Digestibility; Fat; Soybean; Volatile fatty acids.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000300008

Changes in ruminal fermentation and mineral serum level in animals kept in high temperature environments
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Salles,Márcia Saladini Vieira; Zanetti,Marcus Antonio; Salles,Fernando André; Titto,Evaldo Antonio Lencioni; Conti,Renata Maria Consentino.
In order to evaluate the effect of environmental temperature on ruminal fermentation and on mineral levels of growing ruminants, it was used 12 male calves (initial average weight 82.9 ± 7.7 kg, 100 days of age), were employed in a randomized block design (by weight) experiment, with repeated weight measurement and two environmental temperatures: thermoneutral (24ºC) and heat-stressed (33ºC), during 38 days. The animals exposed to 33ºC presented lower dry matter ingestion, lower T3 (triiodothyronine) serum level, higher ammoniacal nitrogen (NH3-N) level in the rumen liquid, and higher rectal and body temperatures during all the experimental period when compared to the animals kept in thermoneutral environment (24ºC). The animals kept under heat stress...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ammoniacal nitrogen; Dry matter ingestion; Heat stress; Macromineral; Micromineral; Volatile fatty acids.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000400025

Effects of dietary energy and nitrogen supplements on rumen fermentation and protozoa population in buffalo and zebu cattle
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Franzolin,Raul; Rosales,Fabrício Pini; Soares,Weber Vilas Bôas.
The effects were assessed of two energy sources in concentrate (ground grain corn vs. citrus pulp) and two nitrogen sources (soybean meal vs. urea) on rumen metabolism in four buffaloes and four zebu cattle (Nellore) with rumen cannula and fed in a 4 × 4 Latin square design with feeds containing 60% sugar cane. Energy supplements had no effect on the rumen ammonia concentration in cattle, but ground grain corn promoted higher ammonia level than citrus pulp in buffalo. Urea produced higher ammonia level than soybean meal in both animal species. On average, the buffaloes maintained a lower rumen ammonia concentration (11.7 mg/dL) than the cattle (14.5 mg/dL). Buffaloes had lower production of acetic acid than cattle (58.7 vs. 61.6 mol/100 mol) and higher of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus pulp; Rumen metabolism; Sugar cane; Urea; Volatile fatty acids.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000300014

Do live or inactive yeasts improve cattle ruminal environment?
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Cunha,Camila Soares; Marcondes,Marcos Inácio; Silva,Alex Lopes da; Gionbelli,Tathyane Ramalho Santos; Novaes,Marco Aurélio Schiavo; Knupp,Leonardo Sidney; Virginio Júnior,Gercino Ferreira; Veloso,Cristina Mattos.
ABSTRACT This research was conducted to investigate the effect of live and inactive sugarcane yeast on beef cattle voluntary intake, apparent digestibility of nutrients, ruminal pH, volatile fatty acids (VFA) concentrations, and ruminal ammonia. Five rumen-cannulated Nellore heifers were distributed in a 5×5 Latin square design, with five experimental periods of 15 days, with seven days for adaptation to the additives and the remaining days for data records and sampling. Total mixed ration (TMR) was composed by corn silage (20%) and concentrate (80%) based on corn and soybean meal. Five treatments were evaluated: without additive use (negative control; NC); chemical buffer addition – 0.71% in concentrate DM of sodium bicarbonate and 0.18% of magnesium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestibility; Feed additive; Intake; PH; Ruminal ammonia; Volatile fatty acids.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100705

Evaluation of additive for reducing gaseous emissions from swine waste
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: Sanjay B. Shah; NC State University; Praveen Kolar; Biological and Agricultural Engineering Department, North Carolina State University, Raleigh, NC 27695, USA.
Additives can reduce gaseous emissions from swine waste lagoons and pits.  We have demonstrated for the first time that an additive has the potential to reduce methane emission from an anaerobic swine lagoon.  ManureMax®, a humate product was evaluated for its ability to reduce gas and odor emissions from swine anaerobic lagoon and barn flush-water.  Four treatments, Control (no additive), Low (label dosage), Medium (50% higher than label dosage), and High (200% higher than label dosage) were applied to inclined pipes installed in a swine lagoon.  While the Medium and High treatments were not effective, the Low treatment reduced methane, 2-butanone, and tetrahydrofuran concentrations by 34%, 44%, and 57%, respectively vs. the Control in the pipe headspace....
Palavras-chave: Agricultural engineering; Environmental engineering; Air quality; Greenhouse gases; Animal waste Hog; Mesocosm-scale; Methane; 2-butanone; Tetrahydrofuran; Volatile fatty acids; Toluene.
Ano: 2012
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2111

Biogenic amines and mycotoxins concentrations in baled silage from organic and conventional farms
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Jovaišienė,J.; Bakutis,B.; Baliukonienė,V.; Matusevičius,P.; Lipiński,K.; Antoszkiewicz,Z.; Fijałkowska,M.
ABSTRACT The aim of the current study was to investigate biogenic amines and mycotoxins concentrations in baled silage (mainly Poaceae family grasses) prepared in organic and conventional farms and to relate these parameters to fermentative parameters. The mean dry matter (DM) content was 364.10±93.31 and 424.70±95.93g/kg in the silage from organic and conventional farms respectively. The silage samples from organic farms had 17.00% higher (P≤ 0.05) tyramine (TY) than the silage from conventional farms. Conventional farm samples were characterized by 46.00% higher histamine (HIS) (P≤ 0.05), 9.80% higher putrescine (PUT) (P≤ 0.05), 17.30% higher cadaverine (CAD) (P≤ 0.05). Aflatoxins (AFL) (total) and zearalenone (ZEN), T-2/HT-2 concentrations were higher...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biogenic amines; Mycotoxins; Volatile fatty acids; Organic farm; Conventional farm.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000200269