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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
20/09/2021 |
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Data da última atualização: |
10/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, M. J.; CLARO, P. I. C.; SILVA, J. C. da; SCALOPPI JUNIOR, E. J.; GONÇALVES, P. de S.; MARTINS, M. A.; MATTOSO, L. H. C. |
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Afiliação: |
MARIA ALICE MARTINS, CNPDIA; LUIZ HENRIQUE CAPPARELLI MATTOSO, CNPDIA. |
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Título: |
Evaluation of the physicochemical properties of natural rubber from Hevea brasiliensis clones. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Industrial Crops & Products, v. 171, 113925, 2021. |
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Páginas: |
1 - 8 |
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ISSN: |
0926-6690 |
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DOI: |
https://doi.org/10.1016/j.indcrop.2021.113925 |
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Idioma: |
Inglês |
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Conteúdo: |
Natural rubber (NR) is a raw material that presents unique properties and has many industrial applications. However, due to the global commercial demand for rubber, there is still need for research to increase its production and quality. In this work, the physicochemical, thermal, and structural properties of the latex and dry rubber of four rubber tree clones and the relation to NR final properties were assessed over two extraction periods. The intra- and inter-clone comparison results were evaluated using analysis of variance and the multiple comparison tests. The greatest variation among clones and between tapping periods was observed with regard to chemical composition. All clones showed uniformity in the thermal and structural evaluations. The results allowed comparison among the clones, the extraction periods and within the same clone, enabling analysis of performance and uniformity of the rubber produced, which are highly wanted characteristics in the NR and latex industry |
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Palavras-Chave: |
Plants that produce latex; Raw natural rubber; Statistical analyses. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01818naa a2200265 a 4500
001 2134557
005 2022-06-10
008 2021 bl uuuu u00u1 u #d
022 $a0926-6690
024 7 $ahttps://doi.org/10.1016/j.indcrop.2021.113925$2DOI
100 1 $aSILVA, M. J.
245 $aEvaluation of the physicochemical properties of natural rubber from Hevea brasiliensis clones.$h[electronic resource]
260 $c2021
300 $a1 - 8
520 $aNatural rubber (NR) is a raw material that presents unique properties and has many industrial applications. However, due to the global commercial demand for rubber, there is still need for research to increase its production and quality. In this work, the physicochemical, thermal, and structural properties of the latex and dry rubber of four rubber tree clones and the relation to NR final properties were assessed over two extraction periods. The intra- and inter-clone comparison results were evaluated using analysis of variance and the multiple comparison tests. The greatest variation among clones and between tapping periods was observed with regard to chemical composition. All clones showed uniformity in the thermal and structural evaluations. The results allowed comparison among the clones, the extraction periods and within the same clone, enabling analysis of performance and uniformity of the rubber produced, which are highly wanted characteristics in the NR and latex industry
653 $aPlants that produce latex
653 $aRaw natural rubber
653 $aStatistical analyses
700 1 $aCLARO, P. I. C.
700 1 $aSILVA, J. C. da
700 1 $aSCALOPPI JUNIOR, E. J.
700 1 $aGONÇALVES, P. de S.
700 1 $aMARTINS, M. A.
700 1 $aMATTOSO, L. H. C.
773 $tIndustrial Crops & Products$gv. 171, 113925, 2021.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Pantanal. Para informações adicionais entre em contato com cpap.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
07/03/2016 |
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Data da última atualização: |
04/11/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 3 |
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Autoria: |
KEAMBOU, T. C.; KANA, J. R.; NGAH, A. M.; TEDONGMO, A. M. Y.; JULIANO, R. S.; LISITA, F. O.; MANJELI, Y. |
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Afiliação: |
T. C. KEAMBOU, UNIVERSITY OF BUEA; J. R. KANA, UNIVERSITY OF BUEA; A. M. NGAH, UNIVERSITY OF DSCHANG; A. M. Y. TEDONGMO, UNIVERSITY OF DSCHANG; RAQUEL SOARES JULIANO, CPAP; FREDERICO OLIVIERI LISITA, CPAP; Y. MANJELI, UNIVERSITY OF DSCHANG. |
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Título: |
Socio-economic, technical characteristics and challenges to local chicken production in the Western Highlands of Cameroon. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Livestock Research for Rural Development , v. 28, n. 3, 2016. |
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Páginas: |
não paginado. |
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ISSN: |
0121-3784 |
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Idioma: |
Inglês |
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Conteúdo: |
The aim of this study was to gain understanding of local chicken farming system from the Western Highlands of Cameroonian. Interviews and structure questionnaire were applied to 156 household.
The main results showed that local chickens are bred by all the tribes in the area. Chicken farming is practiced by 58.3% of women, aged 30 to 50 years (51.3%) who provide 100% of the manpower. Farmers are from all religions, literacy level is relatively high (74.4%) although about 91% of farmers have never been trained in poultry farming, and 14.7% of them have been rearing local chickens for more than 20 years. Local chicken rearing has multiple purposes in 84.6% of farmers (self-consumption, markets, gift and savings). Local chickens farming contribute annually by more than 100.000F CFA to household income. Chicken farming is associated with small ruminants (26.3%), cattle (3.8%), pigs (3.2%) and other animal species (43.1%; dog, cat, commercial chicken broilers, ducks, rabbits guinea pigs). Farmers identified four main genetic types of local chicken, namely normal feathered chickens (98%), crested chickens (44%), naked-neck chickens (26.9%), feathered tarsus chickens (22 %) and frizzle chickens (4.5%). The size of the flocks varied from 7 to 70 with an average of 16 chickens per farm. The structure consists of 8.85% cocks, 23.35% adult hens, 22.1% growers and 45.6%chicks. Chickens were generally raised under free-range and extensive system (96.1%). They were kept overnight in kitchens (50.6%), locally made poultry houses (16.7%), huts (12.2%), abandoned houses (4.5%) while 16% of chickens slept on trees. Kitchen waste (98.7%), free scavenging (96.8%) and cereals (76.9%) were the main sources of feed. The average number of eggs produced in a year varied from 38 to 45 with a hatching rate of 79.6%. The main challenges in chicken farming were diseases (51.9%), predation (48.7%), financial issues for inputs acquisition and lack of equipment (44.2%), feed (41.02%), housing (33.9%), lack of improved genetic material (30.8%) and stock theft were the main constraints. Despite these challenges, most of local poultry farmers were planning to increase their flock size, improve housing, and acquire improved genetic material. This study suggest that more technical support to local chicken farmers could booster the productivity. MenosThe aim of this study was to gain understanding of local chicken farming system from the Western Highlands of Cameroonian. Interviews and structure questionnaire were applied to 156 household.
The main results showed that local chickens are bred by all the tribes in the area. Chicken farming is practiced by 58.3% of women, aged 30 to 50 years (51.3%) who provide 100% of the manpower. Farmers are from all religions, literacy level is relatively high (74.4%) although about 91% of farmers have never been trained in poultry farming, and 14.7% of them have been rearing local chickens for more than 20 years. Local chicken rearing has multiple purposes in 84.6% of farmers (self-consumption, markets, gift and savings). Local chickens farming contribute annually by more than 100.000F CFA to household income. Chicken farming is associated with small ruminants (26.3%), cattle (3.8%), pigs (3.2%) and other animal species (43.1%; dog, cat, commercial chicken broilers, ducks, rabbits guinea pigs). Farmers identified four main genetic types of local chicken, namely normal feathered chickens (98%), crested chickens (44%), naked-neck chickens (26.9%), feathered tarsus chickens (22 %) and frizzle chickens (4.5%). The size of the flocks varied from 7 to 70 with an average of 16 chickens per farm. The structure consists of 8.85% cocks, 23.35% adult hens, 22.1% growers and 45.6%chicks. Chickens were generally raised under free-range and extensive system (96.1%). They were kept overnight in kitch... Mostrar Tudo |
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Palavras-Chave: |
Family poultry; Production systems. |
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Thesagro: |
Frango. |
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Thesaurus NAL: |
Poultry; Poultry production. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03141naa a2200277 a 4500
001 2039971
005 2016-11-04
008 2016 bl --- 0-- u #d
022 $a0121-3784
100 1 $aKEAMBOU, T. C.
245 $aSocio-economic, technical characteristics and challenges to local chicken production in the Western Highlands of Cameroon.
260 $c2016
300 $anão paginado.
520 $aThe aim of this study was to gain understanding of local chicken farming system from the Western Highlands of Cameroonian. Interviews and structure questionnaire were applied to 156 household. The main results showed that local chickens are bred by all the tribes in the area. Chicken farming is practiced by 58.3% of women, aged 30 to 50 years (51.3%) who provide 100% of the manpower. Farmers are from all religions, literacy level is relatively high (74.4%) although about 91% of farmers have never been trained in poultry farming, and 14.7% of them have been rearing local chickens for more than 20 years. Local chicken rearing has multiple purposes in 84.6% of farmers (self-consumption, markets, gift and savings). Local chickens farming contribute annually by more than 100.000F CFA to household income. Chicken farming is associated with small ruminants (26.3%), cattle (3.8%), pigs (3.2%) and other animal species (43.1%; dog, cat, commercial chicken broilers, ducks, rabbits guinea pigs). Farmers identified four main genetic types of local chicken, namely normal feathered chickens (98%), crested chickens (44%), naked-neck chickens (26.9%), feathered tarsus chickens (22 %) and frizzle chickens (4.5%). The size of the flocks varied from 7 to 70 with an average of 16 chickens per farm. The structure consists of 8.85% cocks, 23.35% adult hens, 22.1% growers and 45.6%chicks. Chickens were generally raised under free-range and extensive system (96.1%). They were kept overnight in kitchens (50.6%), locally made poultry houses (16.7%), huts (12.2%), abandoned houses (4.5%) while 16% of chickens slept on trees. Kitchen waste (98.7%), free scavenging (96.8%) and cereals (76.9%) were the main sources of feed. The average number of eggs produced in a year varied from 38 to 45 with a hatching rate of 79.6%. The main challenges in chicken farming were diseases (51.9%), predation (48.7%), financial issues for inputs acquisition and lack of equipment (44.2%), feed (41.02%), housing (33.9%), lack of improved genetic material (30.8%) and stock theft were the main constraints. Despite these challenges, most of local poultry farmers were planning to increase their flock size, improve housing, and acquire improved genetic material. This study suggest that more technical support to local chicken farmers could booster the productivity.
650 $aPoultry
650 $aPoultry production
650 $aFrango
653 $aFamily poultry
653 $aProduction systems
700 1 $aKANA, J. R.
700 1 $aNGAH, A. M.
700 1 $aTEDONGMO, A. M. Y.
700 1 $aJULIANO, R. S.
700 1 $aLISITA, F. O.
700 1 $aMANJELI, Y.
773 $tLivestock Research for Rural Development$gv. 28, n. 3, 2016.
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