Kemilly Naves, A. C. P. D. Menezes Filho, A. O. Souza, Aparecida Sofia Taques, I. Alves, Matheus Vinícius Abadia Ventura
Apis mellifera abelha eussocial é dentre os grupos de Apidae com maior produção de mel anualmente. Este estudo teve por objetivo, avaliar amostras de méis adquiridos no comércio em Rio Verde, Goiás, Brasil, quanto as características físico-químicas (quantitativa e qualitativa). Foram adquiradas 10 amostras de méis de A. mellifera. Foram realizados os ensaios metodológicos para teores de umidade, cinzas e açúcares redutores, hidroximetilfurfural, bem como, pH, cor Pfund, condutimetria, teste de lund, lugol, °Brix e sólidos insolúveis em água. Os méis avaliados apresentaram padrão nas exigências para normativas que regem a qualidade de mel no Brasil, no entanto, os testes qualitativos demonstram haver adulterações em amostras analisadas, sugerindo atenção quanto aos órgãos de vigilância sanitária e também dos próprios apicultores. As amostras em sua maioria, apresentam qualidade físico-química, no entanto, os testes qualitativos demonstraram que há adulterações em sete das dez amostras analisadas.
{"title":"Estudo físico-químico de méis comercializados no município de Rio Verde, Goiás, Brasil","authors":"Kemilly Naves, A. C. P. D. Menezes Filho, A. O. Souza, Aparecida Sofia Taques, I. Alves, Matheus Vinícius Abadia Ventura","doi":"10.14295/bjs.v2i5.366","DOIUrl":"https://doi.org/10.14295/bjs.v2i5.366","url":null,"abstract":"Apis mellifera abelha eussocial é dentre os grupos de Apidae com maior produção de mel anualmente. Este estudo teve por objetivo, avaliar amostras de méis adquiridos no comércio em Rio Verde, Goiás, Brasil, quanto as características físico-químicas (quantitativa e qualitativa). Foram adquiradas 10 amostras de méis de A. mellifera. Foram realizados os ensaios metodológicos para teores de umidade, cinzas e açúcares redutores, hidroximetilfurfural, bem como, pH, cor Pfund, condutimetria, teste de lund, lugol, °Brix e sólidos insolúveis em água. Os méis avaliados apresentaram padrão nas exigências para normativas que regem a qualidade de mel no Brasil, no entanto, os testes qualitativos demonstram haver adulterações em amostras analisadas, sugerindo atenção quanto aos órgãos de vigilância sanitária e também dos próprios apicultores. As amostras em sua maioria, apresentam qualidade físico-química, no entanto, os testes qualitativos demonstraram que há adulterações em sete das dez amostras analisadas. ","PeriodicalId":9244,"journal":{"name":"Brazilian Journal of Poultry Science","volume":"14 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83498801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-07DOI: 10.1590/1806-9061-2022-1694
OG Nájera-Pedraza, MA Mellado-Bosque, JE García-Martínez, JA Encina-Domínguez, J. Salinas-Chavira
This study evaluated the productive performance and carcass characteristics of broiler chickens fed diets containing prilled fats of palm oil (PFPO) or calcium soaps of palm oil (CaSPO) replacing vegetable oils (VO). A total of two hundred 1-day-old male Ross 308 chickens were allocated in a 2 × 2 randomized factorial design. Diets included 2 PFPO levels (0 and 50%) and 2 CaSPO levels (0 and 50%). The level was the percentage of substitution of VO by granulated fats. The study had two phases (starter and finisher), each lasting 21 days. In the starter phase, PFPO did not influence (main effects; p >0.05) feed intake and body weight gain, but improved (main effect; p =0.03) feed conversion. In the finisher phase and the total study, PFPO had no effect ( p >0.05) on these productive variables. Throughout the study, CaSPO did not influence feed intake (main effect; p >0.50), but decreased weight gain and had a negative effect on feed conversion (main effects; p <0.05). There was no influence of fats (PFPO or CaSPO) on carcass yield, breast, drumsticks plus thighs, and wings (main effects; p >0.05). Chickens fed CaSPO had lower (main effect; p =0.02) carcass weight. The only PFPO × CaSPO interaction ( p =0.04) was for back yield. Results showed that PFPO or CaSPO could be employed in formulating broiler chicken diets, as they are less expensive than conventional VO. Partial substitution of VO for PFPO had minimal effect on productive variables, although partial dietary inclusion of CaSPO might slightly reduce the production of broiler chickens.
{"title":"Replacement of Conventional Vegetable Oil with Granulated Fats of Palm Oil (Prilled Fats and Calcium Soaps) in Broiler Chicken Diet: Performance and Carcass Traits","authors":"OG Nájera-Pedraza, MA Mellado-Bosque, JE García-Martínez, JA Encina-Domínguez, J. Salinas-Chavira","doi":"10.1590/1806-9061-2022-1694","DOIUrl":"https://doi.org/10.1590/1806-9061-2022-1694","url":null,"abstract":"This study evaluated the productive performance and carcass characteristics of broiler chickens fed diets containing prilled fats of palm oil (PFPO) or calcium soaps of palm oil (CaSPO) replacing vegetable oils (VO). A total of two hundred 1-day-old male Ross 308 chickens were allocated in a 2 × 2 randomized factorial design. Diets included 2 PFPO levels (0 and 50%) and 2 CaSPO levels (0 and 50%). The level was the percentage of substitution of VO by granulated fats. The study had two phases (starter and finisher), each lasting 21 days. In the starter phase, PFPO did not influence (main effects; p >0.05) feed intake and body weight gain, but improved (main effect; p =0.03) feed conversion. In the finisher phase and the total study, PFPO had no effect ( p >0.05) on these productive variables. Throughout the study, CaSPO did not influence feed intake (main effect; p >0.50), but decreased weight gain and had a negative effect on feed conversion (main effects; p <0.05). There was no influence of fats (PFPO or CaSPO) on carcass yield, breast, drumsticks plus thighs, and wings (main effects; p >0.05). Chickens fed CaSPO had lower (main effect; p =0.02) carcass weight. The only PFPO × CaSPO interaction ( p =0.04) was for back yield. Results showed that PFPO or CaSPO could be employed in formulating broiler chicken diets, as they are less expensive than conventional VO. Partial substitution of VO for PFPO had minimal effect on productive variables, although partial dietary inclusion of CaSPO might slightly reduce the production of broiler chickens.","PeriodicalId":9244,"journal":{"name":"Brazilian Journal of Poultry Science","volume":"76 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67654860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-07DOI: 10.1590/1806-9061-2022-1648
Y. Qi, X. Zhang, Y. Pang, B. Yuan, J. Cheng
MC1R plays a crucial role in controlling the type of melanin synthesized in the melanocytes, which greatly affects plumage color in birds. One g.16796362G/T SNP was found in the MC1R gene coding region, which caused a Met120Ile mutation in the amino acid sequence. The Met120Ile mutation was located in the third transmembrane domain of the MC1R protein and decreased protein stability. The g.16796362G/T locus achieved medium polymorphism and had significant association with feather melanin content in Chinese yellow quails. The contents of total melanin and pheomelanin with AA genotype were significant lower than those with AB or BB genotypes in skin tissues, while the expression levels of MC1R mRNA had no significant difference in feathers with different genotypes. This experiment indicated that the Met120Ile mutation could affect the function of the MC1R protein and change the biosynthesis of melanin in Chinese yellow quails.
{"title":"Identification of Polymorphism in the MC1R Gene and Its Association with the Melanin Content in Feathers of Chinese Yellow Quails","authors":"Y. Qi, X. Zhang, Y. Pang, B. Yuan, J. Cheng","doi":"10.1590/1806-9061-2022-1648","DOIUrl":"https://doi.org/10.1590/1806-9061-2022-1648","url":null,"abstract":"MC1R plays a crucial role in controlling the type of melanin synthesized in the melanocytes, which greatly affects plumage color in birds. One g.16796362G/T SNP was found in the MC1R gene coding region, which caused a Met120Ile mutation in the amino acid sequence. The Met120Ile mutation was located in the third transmembrane domain of the MC1R protein and decreased protein stability. The g.16796362G/T locus achieved medium polymorphism and had significant association with feather melanin content in Chinese yellow quails. The contents of total melanin and pheomelanin with AA genotype were significant lower than those with AB or BB genotypes in skin tissues, while the expression levels of MC1R mRNA had no significant difference in feathers with different genotypes. This experiment indicated that the Met120Ile mutation could affect the function of the MC1R protein and change the biosynthesis of melanin in Chinese yellow quails.","PeriodicalId":9244,"journal":{"name":"Brazilian Journal of Poultry Science","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67654064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A utilização da irradiação em alimentos não é uma técnica nova, mas vem apresentando relevantes avanços em sua aceitação e nos benefícios que eles podem providenciar aos alimentos. Logo, este trabalho teve por objetivo avaliar a história da utilização da técnica de irradiação nos alimentos. Bem como, observar quais foram os principais benefícios e metodologias empregadas. Em seguida, constatou-se que esta é uma técnica segura e eficiente para aumentar o tempo de vida em prateleira dos alimentos e livrar de patógenos. Além disso, apresenta uma regulamentação de suma importância que garante qualidade e segurança para estes alimentos, difundindo ainda mais o processo no meio social e acadêmico.
{"title":"Irradiação de alimentos: Revisão comparativa, histórica e difusão do processo","authors":"","doi":"10.14295/bjs.v2i8.313","DOIUrl":"https://doi.org/10.14295/bjs.v2i8.313","url":null,"abstract":"A utilização da irradiação em alimentos não é uma técnica nova, mas vem apresentando relevantes avanços em sua aceitação e nos benefícios que eles podem providenciar aos alimentos. Logo, este trabalho teve por objetivo avaliar a história da utilização da técnica de irradiação nos alimentos. Bem como, observar quais foram os principais benefícios e metodologias empregadas. Em seguida, constatou-se que esta é uma técnica segura e eficiente para aumentar o tempo de vida em prateleira dos alimentos e livrar de patógenos. Além disso, apresenta uma regulamentação de suma importância que garante qualidade e segurança para estes alimentos, difundindo ainda mais o processo no meio social e acadêmico.","PeriodicalId":9244,"journal":{"name":"Brazilian Journal of Poultry Science","volume":"21 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83279365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-07DOI: 10.1590/1806-9061-2022-1717
I. Choi
This study aimed to evaluate the effects of dietary supplementation pelleted Tenebrio molitor (TM) powder with chokeberry by-product (CBP) meal on duck production and meat quality traits. A total of 180 0-day-old Pekin ducks were allocated randomly between three dietary groups viz., control, Treatment 1, and Treatment 2, with three pens per group and twenty birds per pen, characterized by increasing levels of pelleted TM powder with CBP meal in concentration of 0%, 1.5%, and 3%, respectively, and reared until 42 days of age in a completely randomized design. On day 42, the ducks were sacrificed, and breast and thigh muscles were used for meat quality evaluations. Feeding pelleted TM powder with CBP meal resulted in a significant difference in final body weight, weight gain and feed conversion ratio ( p <0.05). Additionally, a significant difference was observed in the pH of the breast meat samples ( p <0.05). As the only significant difference between the breast and thigh meat, 1,1-diphenyl-2-picryhydrazyl radical scavenging was influenced significantly by the dietary inclusion of pelleted TM powder with CBP meal ( p <0.05). However, the values of thiobarbituric acid reactive substances and meat color in both breast and thigh meat were insignificant ( p >0.05) different among all groups. To conclude, the inclusion of up to 3 % of pelleted TM powder with CBP meal in the diets of ducks did improve the growth production and antioxidant characteristics effects, which could decrease TBARS and reflected by changes in 1,1-diphenyl-2-picrylhydrazyl free DPPH radical scavenging values.
{"title":"Evaluation of Pelleting Mealworm (Tenebrio Molitor) Powder with Chokeberry By-product Meal To improve Duck Production and Meat Quality Traits","authors":"I. Choi","doi":"10.1590/1806-9061-2022-1717","DOIUrl":"https://doi.org/10.1590/1806-9061-2022-1717","url":null,"abstract":"This study aimed to evaluate the effects of dietary supplementation pelleted Tenebrio molitor (TM) powder with chokeberry by-product (CBP) meal on duck production and meat quality traits. A total of 180 0-day-old Pekin ducks were allocated randomly between three dietary groups viz., control, Treatment 1, and Treatment 2, with three pens per group and twenty birds per pen, characterized by increasing levels of pelleted TM powder with CBP meal in concentration of 0%, 1.5%, and 3%, respectively, and reared until 42 days of age in a completely randomized design. On day 42, the ducks were sacrificed, and breast and thigh muscles were used for meat quality evaluations. Feeding pelleted TM powder with CBP meal resulted in a significant difference in final body weight, weight gain and feed conversion ratio ( p <0.05). Additionally, a significant difference was observed in the pH of the breast meat samples ( p <0.05). As the only significant difference between the breast and thigh meat, 1,1-diphenyl-2-picryhydrazyl radical scavenging was influenced significantly by the dietary inclusion of pelleted TM powder with CBP meal ( p <0.05). However, the values of thiobarbituric acid reactive substances and meat color in both breast and thigh meat were insignificant ( p >0.05) different among all groups. To conclude, the inclusion of up to 3 % of pelleted TM powder with CBP meal in the diets of ducks did improve the growth production and antioxidant characteristics effects, which could decrease TBARS and reflected by changes in 1,1-diphenyl-2-picrylhydrazyl free DPPH radical scavenging values.","PeriodicalId":9244,"journal":{"name":"Brazilian Journal of Poultry Science","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67655481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Let G = AB be the mutually permutable product of this supersoluble subgroups A and B. If G’ is nilpotent, then G is supersoluble.
设G = AB是超溶子群A和b的互置换积。如果G′是幂零的，则G是超溶的。
{"title":"Nilpotent and supersoluble groups","authors":"","doi":"10.14295/bjs.v2i8.363","DOIUrl":"https://doi.org/10.14295/bjs.v2i8.363","url":null,"abstract":"Let G = AB be the mutually permutable product of this supersoluble subgroups A and B. If G’ is nilpotent, then G is supersoluble.","PeriodicalId":9244,"journal":{"name":"Brazilian Journal of Poultry Science","volume":"70 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88368826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1590/1806-9061-2021-1591
A. Carvalho, AO Rocha, D. Carvalho, Las Silva, Mjo Almeida, Jlr Sarmento
Growth pattern is essential for economically efficient poultry production. In this study, we aimed to describe the growth curve of chickens of the Canela-Preta breed reared in two different rearing systems, considering their different plumage colors. Initially, 204 one-day-old male and female chicks were randomly distributed in confinement and semi-confinement (102 animals in each system) without separation by gender. The animals were individually identified by wing and foot plastic brands and were weighted every seven days. The body weight and age records were used to estimate the growth curves of the following factors using the Richards model: plumage color, gender, and rearing system. The likelihood ratio test was used to verify the equality of parameters and identify nonlinear models to compare the growth patterns of the evaluated groups. The growth pattern of Canela-Preta chickens changed as a function of gender, plumage color, and rearing system. Females with black plumage, black and gold hens, and males with black and white plumage showed greater sensitivity to changes in rearing systems. Within-breed selection strategies for specific colors can improve the use of growth pattern differences, improving production efficiency. Semi-confinement is suitable for rearing Canela-Preta chickens with any plumage color, as these animals meet the free-range poultry niche market requirements.
{"title":"The Growth Pattern of Brazilian Canela-Preta Chickens with Different Plumages Reared in Two Rearing Systems","authors":"A. Carvalho, AO Rocha, D. Carvalho, Las Silva, Mjo Almeida, Jlr Sarmento","doi":"10.1590/1806-9061-2021-1591","DOIUrl":"https://doi.org/10.1590/1806-9061-2021-1591","url":null,"abstract":"Growth pattern is essential for economically efficient poultry production. In this study, we aimed to describe the growth curve of chickens of the Canela-Preta breed reared in two different rearing systems, considering their different plumage colors. Initially, 204 one-day-old male and female chicks were randomly distributed in confinement and semi-confinement (102 animals in each system) without separation by gender. The animals were individually identified by wing and foot plastic brands and were weighted every seven days. The body weight and age records were used to estimate the growth curves of the following factors using the Richards model: plumage color, gender, and rearing system. The likelihood ratio test was used to verify the equality of parameters and identify nonlinear models to compare the growth patterns of the evaluated groups. The growth pattern of Canela-Preta chickens changed as a function of gender, plumage color, and rearing system. Females with black plumage, black and gold hens, and males with black and white plumage showed greater sensitivity to changes in rearing systems. Within-breed selection strategies for specific colors can improve the use of growth pattern differences, improving production efficiency. Semi-confinement is suitable for rearing Canela-Preta chickens with any plumage color, as these animals meet the free-range poultry niche market requirements.","PeriodicalId":9244,"journal":{"name":"Brazilian Journal of Poultry Science","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Phytochemicals (bioactive compounds) are generally regarded as chemicals of plant origin used for plants for growth, defense against competitors and pathogens. They also have a wide range of pharmacological activities including – antiarrhythmic, antioxidant, antimalarial, vasodilatory, antimicrobial, analgesics, hepato-protective, anti-inflammatory, hypo-cholesterolemic, anti-androgenic, antiviral, antifungal and immune-modulatory. This study was carried out to investigate the bioactive compounds of Prosopis africana oil (african mesquite) using gas chromatography – mass spectrometry technique. A total of 73 bioactive compounds 77.16% were identified based on their peak areas. The major compounds identified in the oil sample were; prosogerin A 29.90%, caryophyllene 12.33%, 2,4-bis (1-phenylethyl) phenol 5.80%, gallic acid 5.22%, β-cyclocitral 3.11%, β-sitosterol 2.50%, α-terpinene 2.09% and ellagic acid 2.04%. The other compounds were less than 1%, however, they exert various pharmacological properties. It was concluded that Prosopis africana oil is loaded with phytochemicals and also has several health promoting properties and it can also be used as a remedy for the treatment of several ailments in human being and animals.
{"title":"Bioactive compounds of Prosopis africana oil (african mesquite) using gas chromatography and mass spectrometry (GC-MS) technique","authors":"John Olujimi Alagbe","doi":"10.14295/bjs.v2i8.359","DOIUrl":"https://doi.org/10.14295/bjs.v2i8.359","url":null,"abstract":"Phytochemicals (bioactive compounds) are generally regarded as chemicals of plant origin used for plants for growth, defense against competitors and pathogens. They also have a wide range of pharmacological activities including – antiarrhythmic, antioxidant, antimalarial, vasodilatory, antimicrobial, analgesics, hepato-protective, anti-inflammatory, hypo-cholesterolemic, anti-androgenic, antiviral, antifungal and immune-modulatory. This study was carried out to investigate the bioactive compounds of Prosopis africana oil (african mesquite) using gas chromatography – mass spectrometry technique. A total of 73 bioactive compounds 77.16% were identified based on their peak areas. The major compounds identified in the oil sample were; prosogerin A 29.90%, caryophyllene 12.33%, 2,4-bis (1-phenylethyl) phenol 5.80%, gallic acid 5.22%, β-cyclocitral 3.11%, β-sitosterol 2.50%, α-terpinene 2.09% and ellagic acid 2.04%. The other compounds were less than 1%, however, they exert various pharmacological properties. It was concluded that Prosopis africana oil is loaded with phytochemicals and also has several health promoting properties and it can also be used as a remedy for the treatment of several ailments in human being and animals.","PeriodicalId":9244,"journal":{"name":"Brazilian Journal of Poultry Science","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135718507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Objetivou-se com esta revisão compilar informações a respeito do tratamento de alimentos volumosos com óxidos e hidróxidos de cálcio e seu fornecimento para ruminantes. Esse tratamento visa melhorar a digestibilidade dos volumosos por meio hidrólise alcalina, beneficiando o valor nutricional. Estudos vem sendo desenvolvidos com intuito de melhorar as características nutritivas e diminuir a frequência de corte pelo armazenamento da cana-de-açúcar a partir de seu tratamento com óxido (CaO) ou hidróxido de cálcio (Ca(OH)2). No entanto, esses tratamentos nem sempre conseguem melhorar as composições dos alimentos, principalmente nos teores de fibras e digestibilidade. Deste modo, o tratamento de forragens utilizando óxidos e hidróxidos de cálcio não é recomendado pela falta de resultados que demonstrem melhoria na qualidade da forragem, características de consumo e desempenho animal.
{"title":"Óxido de CaO e hidróxido de (Ca(OH)2) no tratamento de volumosos","authors":"","doi":"10.14295/bjs.v2i8.311","DOIUrl":"https://doi.org/10.14295/bjs.v2i8.311","url":null,"abstract":"Objetivou-se com esta revisão compilar informações a respeito do tratamento de alimentos volumosos com óxidos e hidróxidos de cálcio e seu fornecimento para ruminantes. Esse tratamento visa melhorar a digestibilidade dos volumosos por meio hidrólise alcalina, beneficiando o valor nutricional. Estudos vem sendo desenvolvidos com intuito de melhorar as características nutritivas e diminuir a frequência de corte pelo armazenamento da cana-de-açúcar a partir de seu tratamento com óxido (CaO) ou hidróxido de cálcio (Ca(OH)2). No entanto, esses tratamentos nem sempre conseguem melhorar as composições dos alimentos, principalmente nos teores de fibras e digestibilidade. Deste modo, o tratamento de forragens utilizando óxidos e hidróxidos de cálcio não é recomendado pela falta de resultados que demonstrem melhoria na qualidade da forragem, características de consumo e desempenho animal. ","PeriodicalId":9244,"journal":{"name":"Brazilian Journal of Poultry Science","volume":"14 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85317514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Luana Cavalcante Gonçalves da Silva, Annelise Kopp Alves
Fotocatalisadores são sólidos semicondutores que se caracterizam por converterem a energia contida em fótons (luz) em energia eletroquímica disponível em um sistema químico, tanto para oxidação, como para a redução de compostos ou espécies químicas (íons). Á aplicação do TiO2 em fotocatálise heterogênea, adquire relevância, devido à sua eficiência na decomposição de poluentes da água, do ar, bactérias, células cancerígenas e na degradação de compostos orgânicos tóxicos. Assim, este trabalho se propôs a sintetizar por electrospinning fibras de TiO2 e de TiO2 dopadas com H2WO4 ou Na2WO4.2H2O. Estas amostras foram tratadas termicamente entre 650 ºC e 800 ºC. Caracterizadas quanto: a morfologia por microscopia eletrônica de varredura (MEV), fases cristalinas por difração de raios X (DRX), e fotoatividade mediante ensaios de degradação de 125 mL de uma solução 20 ppm do corante alaranjado de metila. Os resultados apontam a amostra de TiO2/Na2WO4.2H2O (800 ºC) mais efetiva na degradação do corante, possivelmente devido a existência de uma sincronicidade entre as propriedades químicas e físicas dos óxidos de titânio e tungstênio e a formação das vacâncias de O2.
光催化剂是固体半导体，其特点是将光子(光)中包含的能量转换为化学系统中可用的电化学能量，用于氧化和还原化合物或化学物种(离子)。二氧化钛在多相光催化中的应用具有重要意义，因为它能有效地分解水、空气、细菌、癌细胞和降解有毒有机化合物。因此，本研究提出通过静电纺丝合成二氧化钛纤维和掺杂H2WO4或Na2WO4.2H2O的二氧化钛纤维。这些样品在650ºC到800ºC之间进行热处理。通过扫描电子显微镜(sem)对其形貌进行了表征，通过X射线衍射(xrd)对其晶相进行了表征，并通过降解125 mL 20ppm甲基橙染料溶液进行了光活性测试。结果表明，TiO2/Na2WO4.2H2O(800ºC)样品在染料降解方面更有效，这可能是由于钛和钨氧化物的化学和物理性质与O2空位形成之间的同步性。
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