J. S. S. Carneiro, D. Silva, Robson da Costa Leite, João Victor Gonçalves Carline, Gilberto Coutinho Machado Filho, S. D. O. Lima
Improper soil use leads to inefficient exploitation of natural resources, destruction of land resources, poverty and other social problems. Therefore, the objective of this study was execute a survey and soil classification of an area under pasture in a farm in southern Tocantins. The area was divided according to the existing soil spots to perform the soil classification following the methodology of the Brazilian System of Soil Classification and its agricultural potential. At the studied area were found four soil classes, which were studied and classified as Plintossolo Argiluvico Distrofico petroplintico , Cambissolo Haplico Tb Eutrofico , Latossolo Vermelho-Amarelo Distrofico tipico and Gleissolo Melânico Ta Eutrofico with agricultural potential in the subgroups 1(a)bC, 4P, 1aBC and 3(bc), respectively. The terrain was underutilized, being used for pasture cultivation, at the same time it could be used for cultivation of annual plants.
{"title":"Agricultural potential of areas under pasture in southern Tocantins","authors":"J. S. S. Carneiro, D. Silva, Robson da Costa Leite, João Victor Gonçalves Carline, Gilberto Coutinho Machado Filho, S. D. O. Lima","doi":"10.18067/JBFS.V4I1.123","DOIUrl":"https://doi.org/10.18067/JBFS.V4I1.123","url":null,"abstract":"Improper soil use leads to inefficient exploitation of natural resources, destruction of land resources, poverty and other social problems. Therefore, the objective of this study was execute a survey and soil classification of an area under pasture in a farm in southern Tocantins. The area was divided according to the existing soil spots to perform the soil classification following the methodology of the Brazilian System of Soil Classification and its agricultural potential. At the studied area were found four soil classes, which were studied and classified as Plintossolo Argiluvico Distrofico petroplintico , Cambissolo Haplico Tb Eutrofico , Latossolo Vermelho-Amarelo Distrofico tipico and Gleissolo Melânico Ta Eutrofico with agricultural potential in the subgroups 1(a)bC, 4P, 1aBC and 3(bc), respectively. The terrain was underutilized, being used for pasture cultivation, at the same time it could be used for cultivation of annual plants.","PeriodicalId":119762,"journal":{"name":"Journal of Bioenergy and Food Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124744293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marta Maria Braga Baptista Soares Xavier, R. Franco, E. D. Jesus, M. C. L. Souza, S. S. Duque, Wagner Thadeu Cardoso Esteves
The food irradiation process has been used since the early twentieth century and is technologically established as an important conservation method by eliminating or reducing pathogenic microorganisms, ensuring food quality and safety. The aim of this research was to verify the effect of a gamma irradiation process (Co60) and identify the presence of Campylobacter spp. in chilled chicken hearts, sold in an industry under sanitary inspection, located in the West Zone of Rio de Janeiro/RJ. The hearts of 50 chickens were collected randomly and separated into two groups, one contaminated (CAMPY) on purpose with the intention of observing the efficiency of the gamma irradiation (Co 60 ) process in the control of Campylobacter spp., and the other group (NC) naturally derived from the industrial plant. The two groups (contaminated and uncontaminated) were divided into four subgroups, CONTROL samples (non-irradiated), and samples submitted to 1.5 kGy, 3.0 kGy and 4.5 kGy doses, all samples were kept under refrigeration. At the end of the study, the presence of Campylobacter spp. was observed in samples derived from the industry, while the irradiation process was efficient in the control of Campylobacter spp. at 1.5 kGy, 3.0 kGy and 4.5 kGy.
{"title":"Trial assay: Effect of gamma irradiation (Co60) in the control of Campylobacter spp. in chilled chicken (Gallus gallus) heart","authors":"Marta Maria Braga Baptista Soares Xavier, R. Franco, E. D. Jesus, M. C. L. Souza, S. S. Duque, Wagner Thadeu Cardoso Esteves","doi":"10.18067/JBFS.V4I1.124","DOIUrl":"https://doi.org/10.18067/JBFS.V4I1.124","url":null,"abstract":"The food irradiation process has been used since the early twentieth century and is technologically established as an important conservation method by eliminating or reducing pathogenic microorganisms, ensuring food quality and safety. The aim of this research was to verify the effect of a gamma irradiation process (Co60) and identify the presence of Campylobacter spp. in chilled chicken hearts, sold in an industry under sanitary inspection, located in the West Zone of Rio de Janeiro/RJ. The hearts of 50 chickens were collected randomly and separated into two groups, one contaminated (CAMPY) on purpose with the intention of observing the efficiency of the gamma irradiation (Co 60 ) process in the control of Campylobacter spp., and the other group (NC) naturally derived from the industrial plant. The two groups (contaminated and uncontaminated) were divided into four subgroups, CONTROL samples (non-irradiated), and samples submitted to 1.5 kGy, 3.0 kGy and 4.5 kGy doses, all samples were kept under refrigeration. At the end of the study, the presence of Campylobacter spp. was observed in samples derived from the industry, while the irradiation process was efficient in the control of Campylobacter spp. at 1.5 kGy, 3.0 kGy and 4.5 kGy.","PeriodicalId":119762,"journal":{"name":"Journal of Bioenergy and Food Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132437685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Valéria Barbosa Borges, Maria Antonieta Peixoto Gimenes Couto, M. C. L. Souza, Á. Moraes, Marta Maria Braga Baptista Soares Xavier
This study investigated the micro and macro-morphology of Aspergillus parasiticus , CMT 00064, inoculated into peanut kernels, after gamma irradiation with Cs137. Plates containing kernels inoculated with the fungal strain were incubated in a BOD germination chamber at 25 o C for 5 days. These plates were irradiated at the dose rate of 1.6 kGy/min on the sixth day of incubation. The absorbed doses were: 0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5 and 8.0 kGy. The observed inactivation doses ranged from 4.5 to 8.0 kGy between days 1, 7 and 15 after irradiation. Fungus growth was observed 15 days after irradiation in the plates irradiated between 0 and 7.5 kGy demonstrating that the dose of 8.0 kGy could eliminate the fungus. Subcultures in nutrient media of isolates irradiated at 7.5 kGy recovered its growth in 15 days. Kernels irradiated with 6.5 kGy grew without metula indicating elimination. Colonies that grown after irradiation up 6.0 kGy were biseriate. However, after irradiation with 6.5 kGy they were uniseriate. The survival rates of A. parasiticus , in irradiated substrate peanuts, decreases with increasing absorbing doses of ionizing radiation.
{"title":"Macro and micro-structural study on Aspergillus parasiticus inoculated in peanut kernels treated with gamma radiation (Cs137)","authors":"Valéria Barbosa Borges, Maria Antonieta Peixoto Gimenes Couto, M. C. L. Souza, Á. Moraes, Marta Maria Braga Baptista Soares Xavier","doi":"10.18067/JBFS.V4I1.127","DOIUrl":"https://doi.org/10.18067/JBFS.V4I1.127","url":null,"abstract":"This study investigated the micro and macro-morphology of Aspergillus parasiticus , CMT 00064, inoculated into peanut kernels, after gamma irradiation with Cs137. Plates containing kernels inoculated with the fungal strain were incubated in a BOD germination chamber at 25 o C for 5 days. These plates were irradiated at the dose rate of 1.6 kGy/min on the sixth day of incubation. The absorbed doses were: 0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5 and 8.0 kGy. The observed inactivation doses ranged from 4.5 to 8.0 kGy between days 1, 7 and 15 after irradiation. Fungus growth was observed 15 days after irradiation in the plates irradiated between 0 and 7.5 kGy demonstrating that the dose of 8.0 kGy could eliminate the fungus. Subcultures in nutrient media of isolates irradiated at 7.5 kGy recovered its growth in 15 days. Kernels irradiated with 6.5 kGy grew without metula indicating elimination. Colonies that grown after irradiation up 6.0 kGy were biseriate. However, after irradiation with 6.5 kGy they were uniseriate. The survival rates of A. parasiticus , in irradiated substrate peanuts, decreases with increasing absorbing doses of ionizing radiation.","PeriodicalId":119762,"journal":{"name":"Journal of Bioenergy and Food Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130822423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Although some studies on cover crops in grain production areas have been developed in recent years, information on cover crops in succession to corn silage are still scarce. The objective of this study was to evaluate the effect of different cover crops on the accumulation of nutrients and dry mass yield (DM) in shoots of corn plants in silage production area in the central region of Minas Gerais. The experiment was carried out in two different harvests: 2012/2013 and 2013/2014, which eigth treatments were used consisted of six cover species (turnip, millet, B. ruzziziensis, B. decumbens, crotalaria and sunflower), in addition to a treatment comprising the mixture of millet and crotalaria species and fallow area representing control treatment. The experiment was conducted in a randomized block design with four replications. In the two years of cultivation, the total quantities of nutrients accumulated in the shoots of corn plants did not vary with cover crops, except for the amount of Fe. In two crops, DM yield of corn shoots did not vary according to the different cover crops. The absence of response in corn yield was attributed to lack of adequate moisture for growing corn due to dry spells during harvests.
{"title":"Cover crops in succession to corn for silage in cerrado conditions","authors":"G. Castro, C. Silva, S. G. Moreira, Á. Resende","doi":"10.18067/JBFS.V4I1.130","DOIUrl":"https://doi.org/10.18067/JBFS.V4I1.130","url":null,"abstract":"Although some studies on cover crops in grain production areas have been developed in recent years, information on cover crops in succession to corn silage are still scarce. The objective of this study was to evaluate the effect of different cover crops on the accumulation of nutrients and dry mass yield (DM) in shoots of corn plants in silage production area in the central region of Minas Gerais. The experiment was carried out in two different harvests: 2012/2013 and 2013/2014, which eigth treatments were used consisted of six cover species (turnip, millet, B. ruzziziensis, B. decumbens, crotalaria and sunflower), in addition to a treatment comprising the mixture of millet and crotalaria species and fallow area representing control treatment. The experiment was conducted in a randomized block design with four replications. In the two years of cultivation, the total quantities of nutrients accumulated in the shoots of corn plants did not vary with cover crops, except for the amount of Fe. In two crops, DM yield of corn shoots did not vary according to the different cover crops. The absence of response in corn yield was attributed to lack of adequate moisture for growing corn due to dry spells during harvests.","PeriodicalId":119762,"journal":{"name":"Journal of Bioenergy and Food Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116706598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. V. Fiorini, R. G. Pinho, H. D. Pereira, L. P. M. Pires, Fabrício Vilela Andrade Fiorini, E. L. Resende
In Brazil, with the constant use of concentrated NPK fertilizers, sulfur became a limiting nutrient for corn plant growth and development. This research aimed to evaluate the efficiency of elemental sulfur coating the granule of fertilizer, compared with the sulfur of ammonium sulfate associated to soluble fertilizers based on NPK. The hybrid-corn DKB390 was evaluated under a completely randomized design in a factorial scheme 3x6 (three fertilizers × six phenological stages) with three replications. A soil under corn monoculture was used. Three types of formulated fertilizers (NPK) associated with sulfur (ammonium sulfate or elemental sulfur) and the control without S was used. The accumulation of the shoots and root dry matter, chlorophyll and sulfur in leafs were evaluated. The data were collected at stages: 6 leafs, 10 leafs, 14 leafs, tasselling, flowering and physiological maturity. The used fertilizers provided differences in the shoot dry matter and in the sulfur accumulation in leafs. The sulfur accumulation in corn leafs was similar among the elemental sulfur and the ammonium sulfate treatments. Elemental sulfur provided superior results in comparison to the fertilizer without sulfur and was similar to the fertilizer with ammonium sulfate.
{"title":"Dry matter accumulation, chlorophyll and sulfur leaf in corn fertilized with different sulfur sources","authors":"I. V. Fiorini, R. G. Pinho, H. D. Pereira, L. P. M. Pires, Fabrício Vilela Andrade Fiorini, E. L. Resende","doi":"10.18067/JBFS.V4I1.114","DOIUrl":"https://doi.org/10.18067/JBFS.V4I1.114","url":null,"abstract":"In Brazil, with the constant use of concentrated NPK fertilizers, sulfur became a limiting nutrient for corn plant growth and development. This research aimed to evaluate the efficiency of elemental sulfur coating the granule of fertilizer, compared with the sulfur of ammonium sulfate associated to soluble fertilizers based on NPK. The hybrid-corn DKB390 was evaluated under a completely randomized design in a factorial scheme 3x6 (three fertilizers × six phenological stages) with three replications. A soil under corn monoculture was used. Three types of formulated fertilizers (NPK) associated with sulfur (ammonium sulfate or elemental sulfur) and the control without S was used. The accumulation of the shoots and root dry matter, chlorophyll and sulfur in leafs were evaluated. The data were collected at stages: 6 leafs, 10 leafs, 14 leafs, tasselling, flowering and physiological maturity. The used fertilizers provided differences in the shoot dry matter and in the sulfur accumulation in leafs. The sulfur accumulation in corn leafs was similar among the elemental sulfur and the ammonium sulfate treatments. Elemental sulfur provided superior results in comparison to the fertilizer without sulfur and was similar to the fertilizer with ammonium sulfate.","PeriodicalId":119762,"journal":{"name":"Journal of Bioenergy and Food Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115781442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. C. Ribeiro, Gustavo André Colombo, E. V. D. Carvalho, J. Peluzio, E. Erasmo
The fungus Corynespora cassiicola (Berk. & M.A. Curtis), the causal agent of the target spot in soybean, have occurred frequently in the North Central region of Brazil and may, under high temperature and high humidity conditions, cause serious damage to the crop. As the use of chemical fungicides is recommended in susceptible cultivars, the objective of this study was to determine the fungicide efficiency in the control of the soybean target spot in the cerrado of Tocantins, Brazil, crop 2014/2015. The experimental design was a randomized block with four replications. The treatments were differentiated by plant crop management, with the use of commercial synthetic fungicides applied alone or in combination with each other, plus a control (no application), a total of six different treatments. Were determined the area under the disease progress curve, the percentage of defoliation, thousand grains mass and grain yield. The application of fungicides promoted lower advance of the target spot in soybean, reduction in defoliation, greater thousand grains mass and higher productivity compared with the control. The treatment consists of two sequential applications Pyraclostrobin + Fluxapyroxad reduced by 36.7% the severity of the disease, as well as lower rate of defoliation of plants, promoting increase in mass of thousand grains and soybeans grain yield.
真菌Corynespora cassiicola(伯克。大豆靶斑病的致病因子& M.A. Curtis)在巴西中北部地区频繁发生，在高温高湿条件下可对作物造成严重危害。由于易感品种推荐使用化学杀菌剂，本研究的目的是确定2014/2015年巴西托坎廷斯塞拉多地区大豆靶斑的杀菌剂防治效果。试验设计为随机区组，设4个重复。这些处理按作物管理加以区分，分别使用商业合成杀菌剂单独施用或相互联合施用，加上对照(不施用)，共六种不同的处理。测定了病害进展曲线下面积、落叶率、千粒重和籽粒产量。与对照相比，施用杀菌剂使大豆靶斑提早降低，落叶减少，千粒重增大，产量提高。吡唑菌酯+氟沙吡虫沙连续两次施用，使病害严重程度降低36.7%，植株落叶率降低，促进千粒重的增加和大豆籽粒产量的提高。
{"title":"Chemical control of the soybean target spot (Corynespora cassiicola), in the cerrado of Tocantins, Brazil","authors":"F. C. Ribeiro, Gustavo André Colombo, E. V. D. Carvalho, J. Peluzio, E. Erasmo","doi":"10.18067/JBFS.V4I1.118","DOIUrl":"https://doi.org/10.18067/JBFS.V4I1.118","url":null,"abstract":"The fungus Corynespora cassiicola (Berk. & M.A. Curtis), the causal agent of the target spot in soybean, have occurred frequently in the North Central region of Brazil and may, under high temperature and high humidity conditions, cause serious damage to the crop. As the use of chemical fungicides is recommended in susceptible cultivars, the objective of this study was to determine the fungicide efficiency in the control of the soybean target spot in the cerrado of Tocantins, Brazil, crop 2014/2015. The experimental design was a randomized block with four replications. The treatments were differentiated by plant crop management, with the use of commercial synthetic fungicides applied alone or in combination with each other, plus a control (no application), a total of six different treatments. Were determined the area under the disease progress curve, the percentage of defoliation, thousand grains mass and grain yield. The application of fungicides promoted lower advance of the target spot in soybean, reduction in defoliation, greater thousand grains mass and higher productivity compared with the control. The treatment consists of two sequential applications Pyraclostrobin + Fluxapyroxad reduced by 36.7% the severity of the disease, as well as lower rate of defoliation of plants, promoting increase in mass of thousand grains and soybeans grain yield.","PeriodicalId":119762,"journal":{"name":"Journal of Bioenergy and Food Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129027220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. S. S. Carneiro, Paulo Sérgio Santos Silva, Antônio Carlos Martins dos Santos, G. A. D. Freitas, Rubens Ribeiro da Silva
It is characteristic of the Cerrado low phosphorus availability, requiring the inclusion of phosphorus in fertilizers to obtain satisfactory productivity of pastures. This study aimed to evaluate the effect of doses and sources of phosphorus fertilizers on grass establishing fertilization Panicum maximum cv. Mombasa. The experiment was conducted at the Federal University of Tocantins - Gurupi Campus. The experimental design was a randomized block in a factorial 4 x 6. The first factor consists of four phosphate fertilizer: UFT Fertile, Natural phosphate, Basifos and Simple superphosphate. The second consists of six doses of phosphorus (0; 35; 70; 140, 210 and 280 kg ha-1 P2O5). The fertilization with different sources and phosphorus levels influenced significantly the forage production Panicum maximum cv. Mombasa, increasing grass height, number of tillers, green mass, dry weight of shoot and Falker chlorophyll index. The largest production of Mombasa grass was in doses of 280, 215, 239 and 207 kg ha-1 P2O5 for sources UFT Fertile, Natural phosphate, Basifos and Simple superphosphate respectively. The Basifos fertilizer provided the highest yield of forage.
这是塞拉多低磷有效性的特点，需要在肥料中添加磷以获得满意的牧场生产力。本研究旨在评价不同磷肥用量和不同来源对禾草施肥的影响。蒙巴萨。这项实验是在托坎廷斯-古鲁皮联邦大学校园进行的。实验设计为4 × 6阶乘随机分组。第一个要素由四种磷肥组成:UFT肥沃、天然磷肥、Basifos和简单过磷酸钙。第二组包括六剂磷(0;35;70;140、210和280 kg ha-1 P2O5)。不同来源和磷水平的施肥对草料产量有显著影响。蒙巴萨，增加了草高、分蘖数、鲜重、地上部干重和叶片叶绿素指数。蒙巴萨草产量最高的是UFT肥沃、天然磷酸盐、碱性磷酸钙和简单过磷酸钙，分别施用280、215、239和207 kg ha-1 P2O5。草料产量最高的是Basifos肥。
{"title":"Response of grass Mombasa under the effect of sources and doses of phosphorus in the fertilization formation","authors":"J. S. S. Carneiro, Paulo Sérgio Santos Silva, Antônio Carlos Martins dos Santos, G. A. D. Freitas, Rubens Ribeiro da Silva","doi":"10.18067/JBFS.V4I1.117","DOIUrl":"https://doi.org/10.18067/JBFS.V4I1.117","url":null,"abstract":"It is characteristic of the Cerrado low phosphorus availability, requiring the inclusion of phosphorus in fertilizers to obtain satisfactory productivity of pastures. This study aimed to evaluate the effect of doses and sources of phosphorus fertilizers on grass establishing fertilization Panicum maximum cv. Mombasa. The experiment was conducted at the Federal University of Tocantins - Gurupi Campus. The experimental design was a randomized block in a factorial 4 x 6. The first factor consists of four phosphate fertilizer: UFT Fertile, Natural phosphate, Basifos and Simple superphosphate. The second consists of six doses of phosphorus (0; 35; 70; 140, 210 and 280 kg ha-1 P2O5). The fertilization with different sources and phosphorus levels influenced significantly the forage production Panicum maximum cv. Mombasa, increasing grass height, number of tillers, green mass, dry weight of shoot and Falker chlorophyll index. The largest production of Mombasa grass was in doses of 280, 215, 239 and 207 kg ha-1 P2O5 for sources UFT Fertile, Natural phosphate, Basifos and Simple superphosphate respectively. The Basifos fertilizer provided the highest yield of forage.","PeriodicalId":119762,"journal":{"name":"Journal of Bioenergy and Food Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132110117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. B. Cabral, M. S. F. Lima, G. Fernandes, E. Costa, A. Porto, M. T. H. Cavalcanti
Our study aimed to evaluate technological aspects of lactic acid bacteria isolated from artisan coalho cheese, for obtaining a new starter culture. For this purpose, different bacterial genera were isolated, identified and determined as their acidifying capacity (pH and lactic acid), antagonist activity and proteolytic activity. The results showed that the bacterial population consisted mostly of cocci, among which are Lactococcus, Leuconostoc , Enterococcus and Streptococcus , in addition to Lactobacillus in an approximate ratio of 1:3.5:13:2:1.5, respectively. The microorganisms were classified as fast and slow acidifying, an important balance to the formulation of a new starter culture. Regarding the proteolytic capacity, the qualitative test for protease production showed only few halos, although all extracellular extracts have presented proteolytic enzymes with peaks of production(maximum of 11.71 U/mL)between 24 and 48 hours of cultivation. Around 42.2% of the analyzed bacteria showed antagonistic activity against Escherichia coli , Klebsiella pneumoniae and Staphylococcus aureus . Therefore, it is possible to assume that the lactic acid bacteria isolated from artisan Coalho cheese have great potential for the use in dairy industry as starter cultures.
{"title":"Artisan cheese: a potential source of wild lactic acid bacteria to obtain new starter cultures","authors":"M. B. Cabral, M. S. F. Lima, G. Fernandes, E. Costa, A. Porto, M. T. H. Cavalcanti","doi":"10.18067/JBFS.V3I4.111","DOIUrl":"https://doi.org/10.18067/JBFS.V3I4.111","url":null,"abstract":"Our study aimed to evaluate technological aspects of lactic acid bacteria isolated from artisan coalho cheese, for obtaining a new starter culture. For this purpose, different bacterial genera were isolated, identified and determined as their acidifying capacity (pH and lactic acid), antagonist activity and proteolytic activity. The results showed that the bacterial population consisted mostly of cocci, among which are Lactococcus, Leuconostoc , Enterococcus and Streptococcus , in addition to Lactobacillus in an approximate ratio of 1:3.5:13:2:1.5, respectively. The microorganisms were classified as fast and slow acidifying, an important balance to the formulation of a new starter culture. Regarding the proteolytic capacity, the qualitative test for protease production showed only few halos, although all extracellular extracts have presented proteolytic enzymes with peaks of production(maximum of 11.71 U/mL)between 24 and 48 hours of cultivation. Around 42.2% of the analyzed bacteria showed antagonistic activity against Escherichia coli , Klebsiella pneumoniae and Staphylococcus aureus . Therefore, it is possible to assume that the lactic acid bacteria isolated from artisan Coalho cheese have great potential for the use in dairy industry as starter cultures.","PeriodicalId":119762,"journal":{"name":"Journal of Bioenergy and Food Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115418924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Paulo Victor Gomes Sales, J. Peluzio, Flávio S. Afférri, Ana Cláudia Rodrigues da Costa Sales, Victor Hugo Gomes Sales
Soybean grains have a high protein content, which can vary depending on various factors, as the pods' position throughout the plant. In this sense, aiming to study the effect of pods' position on the main stem of the plant for grades of soybean proteins, It has been accomplished in the years 2010 and 2011, a trial with ten soybean cultivars in the experimental area of the Federal University of Tocantins in Palmas. The experimental area was randomized blocks with 30 treatments and three replications. Treatments were arranged in one a split plot, being allocated in Ten cultivars plots (BRS Valuable, P98Y51, P98Y70, P99R03, M8527RR, M8925RR, M9144RR, M8867RR, and TMG103RR), and the sub plots In the pods' position on the plant (upper third, intermediate, and basal third). According to the results, we can conclude that there is variability among the pods' position. The grains located in the median and apical plant showed a trend of higher protein content. Cultivar P98Y70 showed the highest protein value. In the sampling grain for protein quantitation, it is recommended to use grains of pods located at the same position of the plant.
{"title":"Effect of pods' position on the protein content in soybean grains at low latitude","authors":"Paulo Victor Gomes Sales, J. Peluzio, Flávio S. Afférri, Ana Cláudia Rodrigues da Costa Sales, Victor Hugo Gomes Sales","doi":"10.18067/JBFS.V3I4.102","DOIUrl":"https://doi.org/10.18067/JBFS.V3I4.102","url":null,"abstract":"Soybean grains have a high protein content, which can vary depending on various factors, as the pods' position throughout the plant. In this sense, aiming to study the effect of pods' position on the main stem of the plant for grades of soybean proteins, It has been accomplished in the years 2010 and 2011, a trial with ten soybean cultivars in the experimental area of the Federal University of Tocantins in Palmas. The experimental area was randomized blocks with 30 treatments and three replications. Treatments were arranged in one a split plot, being allocated in Ten cultivars plots (BRS Valuable, P98Y51, P98Y70, P99R03, M8527RR, M8925RR, M9144RR, M8867RR, and TMG103RR), and the sub plots In the pods' position on the plant (upper third, intermediate, and basal third). According to the results, we can conclude that there is variability among the pods' position. The grains located in the median and apical plant showed a trend of higher protein content. Cultivar P98Y70 showed the highest protein value. In the sampling grain for protein quantitation, it is recommended to use grains of pods located at the same position of the plant.","PeriodicalId":119762,"journal":{"name":"Journal of Bioenergy and Food Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117257928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lara Neiva de Siqueira, E. Guarda, P. M. Guarda, R. F. D. Silva, R. Barbosa
Due to search for alternative biomasses, that are easy to access, low cost and high in cellulose concentration, for the production of 2nd generation ethanol - or lignocellulosic - this study was carried out with Pennisetum purpureum, known as elephant grass. The study was conducted to determine the chemical composition of elephant grass forage to evaluate its use in the production of lignocellulosic ethanol. The elephant grass stems were reaped in the experimental area of Feira Agrotecnologica de Palmas (AGROTINS) on august 2015. The results have shown that the elephant grass presented approximately 60% cellulose, demonstrating the potential use of this biomass to obtain reducing sugars. The biomass underwent chemical pretreatment before the enzymatic hydrolysis step using commercial cellulase enzyme Cellic CTEC2. After hydrolysis, gave a 54% yield of reducing sugars, which has shown a yield of 53,9% in the hydrolysis. In addition, the yield for ethanol production was 87,8%. Due to this, it is possible to assure that the elephant grass biomass has a great potential as cellulose source, therefore it can be used as an alternative that is cheap and huge in availability to the production of lignocellulosic ethanol.
{"title":"Yield of hydrolysis and production of lignocellulosic ethanol from elephant grass biomass","authors":"Lara Neiva de Siqueira, E. Guarda, P. M. Guarda, R. F. D. Silva, R. Barbosa","doi":"10.18067/JBFS.V3I4.112","DOIUrl":"https://doi.org/10.18067/JBFS.V3I4.112","url":null,"abstract":"Due to search for alternative biomasses, that are easy to access, low cost and high in cellulose concentration, for the production of 2nd generation ethanol - or lignocellulosic - this study was carried out with Pennisetum purpureum, known as elephant grass. The study was conducted to determine the chemical composition of elephant grass forage to evaluate its use in the production of lignocellulosic ethanol. The elephant grass stems were reaped in the experimental area of Feira Agrotecnologica de Palmas (AGROTINS) on august 2015. The results have shown that the elephant grass presented approximately 60% cellulose, demonstrating the potential use of this biomass to obtain reducing sugars. The biomass underwent chemical pretreatment before the enzymatic hydrolysis step using commercial cellulase enzyme Cellic CTEC2. After hydrolysis, gave a 54% yield of reducing sugars, which has shown a yield of 53,9% in the hydrolysis. In addition, the yield for ethanol production was 87,8%. Due to this, it is possible to assure that the elephant grass biomass has a great potential as cellulose source, therefore it can be used as an alternative that is cheap and huge in availability to the production of lignocellulosic ethanol.","PeriodicalId":119762,"journal":{"name":"Journal of Bioenergy and Food Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125277421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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