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ACE-I inhibitory properties of hydrolysates from germinated and ungerminated Phaseolus lunatus proteins Ciênc. Tecnol. Aliment.
Magaña,Mario Domínguez; Segura-Campos,Maira; Dávila-Ortiz,Gloria; Betancur-Ancona,David; Chel-Guerrero,Luis.
Phaseolus lunatus protein concentrates and the proteases Alcalase(R) and Pepsin-Pancreatin were used for the production of protein hydrolysates that inhibit angiotensin-I converting enzyme (ACE). Protein concentrate obtained from germinated and ungerminated seeds flour was hydrolyzed with Alcalase(R) at enzyme/substrate ratio (E/S) 1/10 and during 0.5 and 2.0 h, respectively. On the other hand, protein concentrate obtained from ungerminated (E/S: 1/10) and germinated (E/S: 1/50) seeds flour was sequentially hydrolyzed with Pepsin-Pancreatin during 1.0 and 3.0 h, respectively. Peptide fractions with ACE inhibitory activity in a range of 0.9 to 3.8 µg/mL were obtained by G-50 gel filtration chromatography and high- performance liquid chromatography C18...
Tipo: Info:eu-repo/semantics/article Palavras-chave: P. lunatus; Hydrolysates; Peptides; ACE inhibitory activity.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612015000100167
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Action of a pancreatin and an Aspergillus oryzae protease on whey proteins: correlation among the methods of analysis of the enzymatic hydrolysates BABT
Morais,Harriman Aley; Silvestre,Marialice Pinto Coelho; Silveira,Josianne Nicácio; Silva,Ana Cristina Simões e; Silva,Viviane Dias Medeiros; Silva,Mauro Ramalho.
The objectives of this study were to hydrolyze whey proteins using a pancreatin and an Aspergillus oryzae protease; to evaluate the degree of hydrolysis (DH) and the peptide profile; and to establish the correlations among the analytical methods. Ten hydrolysates were prepared at different reaction times and the highest DH was obtained by the protein content method. Good correlations (r > 0.87) between the methods of formaldehyde and orthophthalaldehyde (OPA), formaldehyde and osmometry as well as osmometry and OPA were observed using pancreatin. Similar results were obtained between OPA and soluble protein content for the A. oryzae protease. The action of pancreatin produced the highest contents of di- and tripeptides (9.07, 7.12 and 6.46%) and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Whey; Protein Hydrolysates; Degree of Hydrolysis; Peptides; Pancreatin; Aspergillus oryzae Protease.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000600014
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An integrative view to structure, function, ontogeny and phylogenetical significance of the male genital system in Pomacea canaliculata (Caenogastropoda, Ampullariidae) Biocell
Gamarra-Luques,C.; Winik,B.C.; Vega,I.A.; Albrecht,E.A.; Catalan,N.M.; Castro-Vazquez,A..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Spermatogenesis; Steroids; Peptides; Imposex; Xenobiotics.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452006000200012
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Antibacterial activity of Rhynocoris marginatus (Fab.) and Catamirus brevipennis (Servile) (Hemiptera: reduviidae) venomS against human pathogens J. Venom. Anim. Toxins incl. Trop. Dis.
Sahayaraj,K.; Borgio,J. F.; Muthukumar,S.; Anandh,G. P..
The reduviid predators Rhynocoris marginatus (Fab.) and Catamirus brevipennis (Servile) use their venoms to paralyze their preys. We detected the antibacterial activity of R. marginatus and C. brevipennis venoms against seven Gram-negative and four Gram-positive bacteria by using the disc diffusion method. Rhynocoris marginatus venom exhibited antibacterial activity against four Gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris, Salmonella typhimurium) and one Gram-positive (Streptococcus pyogenes). Catamirus brevipennis venom showed antibacterial activity against six Gram-negative (Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa, Klebsiella pneumoniae, Proteus vulgaris, and Salmonella typhimurium) and three...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antibacterial activity; Reduviid saliva; Protein content; Peptides.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992006000300011
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Antithrombotic Activity of Milk Protein Hydrolysates by Lactic Acid Bacteria Isolated from Commercial Fermented Milks BABT
Pérez-Escalante,Emmanuel; Jaimez-Ordaz,Judith; Castañeda-Ovando,Araceli; Contreras-López,Elizabeth; Añorve-Morga,Javier; González-Olivares,Luis Guillermo.
ABSTRACT In the last decade, thrombosis has been one of the pathologies with high incidence creating great concern in Health Institutes all around the world. Considering this, the aim of this research was to determine the antithrombotic activity of peptides released during lactic fermentation. Reconstituted skim milk powder was fermented by Lactobacillus casei Shirota and Lactobacillus johnsonii LA1 isolated from commercial fermented milks. The hydrolysis degree and proteolytic profile were analyzed by trinitrobenzenesulfonic acid spectrophotometry method and by peptide polyacrylamide electrophoresis gel separation. The milk fermented by Lactobacillus casei Shirota exhibited a higher concentration of free amino groups than that fermented by Lactobacillus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antithrombotic activity; Peptides; Lactic fermentation; Probiotic bacteria; Commercial fermented milks.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100506
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Bioactive peptides from marine sources: pharmacological properties and isolation procedures OceanDocs
Aneiros, A.; Garateix, A..
Marine organisms represent a valuable source of new compounds. The biodiversity of the marine environment and the associated chemical diversity constitute a practically unlimited resource of new active substances in the field of the development of bioactive products. In this paper, the molecular diversity of different marine peptides is described as well as information about their biological properties and mechanisms of action is provided. Moreover, a short review about isolation procedures of selected bioactive marine peptides is offered. Novel peptides from sponges, ascidians, mollusks, sea anemones and seaweeds are presented in association with their pharmacological properties and obtainment methods.
Tipo: Journal Contribution Palavras-chave: Marine environment; Marine organisms; Peptides; Bioactive compounds; Marine environment; Peptides; Http://aims.fao.org/aos/agrovoc/c_4610; Http://aims.fao.org/aos/agrovoc/c_5691.
Ano: 2004 URL: http://hdl.handle.net/1834/2921
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Characterization of insecticidal peptides from venom Australian funnel-web spiders J. Venom. Anim. Toxins incl. Trop. Dis.
Vonorax,E. J.; Tyler,M. I.; Atkinson,R. K.; Howden,M. E. H..
Australian funnel-web spiders are relatively large primitive hunting spiders. Male Atrax robustus spiders have been responsible for a number of human deaths. Venom was collected from the species Hadronyche infensa (Hickman) [female], H. formidabilis [male and female], H. versuta [female], and A. robustus (Cambridge) [male] and was fractionated by high performance liquid chromatography. This resulted in the isolation and purification of a homologous series of 7 insecticidal peptides of relatively low molecular mass (approximately 4kDa). The amino acid sequences of these toxins consisted of 36 or 37 amino acids and were named atracotoxins. For the major bioassay of these toxins, we used the cotton bollworm, Helicoverpa armigera (Hubner), due to the great...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Australian funnel-web spiders; Hadronyche and Atrax species; Venom; Insecticidal toxins; Peptides; Helicoverpa armigera.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992006000200005
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Contrôle de la ponte ovulaire chez l'huître creuse Crassostrea gigas : utilisation du modèle Sepia officinalis pour la caractérisation de peptides régulateurs ArchiMer
Bernay, Benoît.
Despite the fact that the involvement of environmental factors in the physiology of the japanese oyster C. gigas is fully described, regulatory peptides are not known. In this study, we focused on peptidergic control of egg-laying. In order to characterize peptides involved in the regulation of egg-laying in C. gigas, the cuttlefish S. officinalis was used as a model. Firstly, regulatory peptides were investigated in the cuttlefish by peptidomic analysis. This approach led to the identification of eleven new ovarian regulatory peptides. Based on conserved tags, these peptides have been classified into two families: the SepCRPs (Sepia Capsule Releasing Peptides) and the OJPs (Ovarian Jelly Peptides). Released by oocytes into the genital coelom, they are...
Tipo: Text Palavras-chave: Ostréiculture; Ovaire; Spectrométrie de masse; Peptides; Céphalopodes; Bivalves; Mollusques.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/these-2566.pdf
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Endogenous vasopressin and the central control of heart rate during dynamic exercise BJMBR
Michelini,L.C..
The present article contains a brief review on the role of vasopressinergic projections to the nucleus tractus solitarii in the genesis of reflex bradycardia and in the modulation of heart rate control during exercise. The effects of vasopressin on exercise tachycardia are discussed on the basis of both the endogenous peptide content changes and the heart rate response changes observed during running in sedentary and trained rats. Dynamic exercise caused a specific vasopressin content increase in dorsal and ventral brainstem areas. In accordance, rats pretreated with the peptide or the V1 blocker into the nucleus tractus solitarii showed a significant potentiation or a marked blunting of the exercise tachycardia, respectively, without any change in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Exercise tachycardia; V1 receptors; Brainstem areas; Peptides; Blood pressure; Training; Rats.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000900012
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Epitope of dengue virus E protein detect human antibodies associated with mild disease: a potential peptide for vaccine development BJID
Sánchez-Burgos,Gilma; Herrera-Nájera,Carla; Cedillo-Rivera,Roberto; Dumonteil,Eric.
ABSTRACT The antigenic potential of seven immunogenic peptides of the dengue virus was evaluated in the sera of patients with dengue confirmed by IgM/IgG serology. Antibodies IgM and IgG against dengue virus peptides were analyzed by ELISA in 31 dengue sero-positive and 20 sero-negative patients. The P5 peptide showed significant IgG immunoreactivity mostly in the sera of patients with dengue without warning signs in comparison with patients with dengue with warning signs, correlating with mild disease. This finding suggests that the low antibody response against P5 epitope could be a risk factor for higher susceptibility to dengue virus infection with warning signs, and that P5 could be a potential antigen for vaccine development.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Dengue virus; Epitopes; Peptides; Antibodies.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702020000100085
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Fish protein hydrolysate in diets for Nile tilapia post-larvae PAB
Silva,Thiberio Carvalho da; Rocha,Joana D’Arc Mauricio; Moreira,Pedro; Signor,Altevir; Boscolo,Wilson Rogerio.
Abstract: The objective of this work was to determine the apparent digestibility coefficient (ADC) of crude protein, crude energy, fat, and dry matter of fish protein hydrolysate (FPH), made of by-products of Nile tilapia (Oreochromis niloticus) and whole sardines (Cetengraulis edentulus), and to evaluate the productive performance and muscle fiber growth of Nile tilapia post-larvae. Two trials were conducted, the first one to determine the digestibility in 120 fingerlings (70.0±2.0 g), and the second one to evaluate the productive performance of 375 post-larvae, with three days of age, which were distributed in 25 aquaria with 30 L of useful volume. Five diets were prepared based on vegetable ingredients, to which fish were included at 0, 2, 4, 6, and 8%...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cetengraulis edentulus; Oreochromis niloticus; Digestibility; Fish meal; Nutrition; Peptides; Pisciculture..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000700485
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Histidines 13 and 14 in the Aβ sequence are targets for inhibition of Alzheimer's disease Aβ ion channel and cytotoxicity Biol. Res.
DÍAZ,JUAN CARLOS; LINNEHAN,JOHN; POLLARD,HARVEY; ARISPE,NELSON.
The fact that Alzheimer's beta amyloid (Aβ) peptides forms cation channels in lipid bilayers was discovered during the course of our experiments in the laboratory of "Guayo" Rojas at NIH in Bethesda, Maryland (USA). Recently, we found that the Aβ ion channel could be blocked selectively with small peptides that copy the amino acid sequence of the predicted mouth region of the Aβ channel pore. We now have searched for the essential amino acid residues required for this blocking effect by mutations. We found that the ability of peptides to block Aβ channel activity could be lost by replacement of histidines 13 and 14 by alanine or lysine. The amino acid substitution also resulted in the loss of the capacity of the peptides...
Tipo: Journal article Palavras-chave: Alzheimer's disease; Beta amyloid; Ion channel blockers; Peptides; Histidine; Toxicity.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000300007
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Hymenoptera venom review focusing on Apis mellifera J. Venom. Anim. Toxins incl. Trop. Dis.
Lima,P. R. de; Brochetto-Braga,M. R..
Hymenoptera venoms are complex mixtures containing simple organic molecules, proteins, peptides, and other bioactive elements. Several of these components have been isolated and characterized, and their primary structures determined by biochemical techniques. These compounds are responsible for many toxic or allergic reactions in different organisms, such as local pain, inflammation, itching, irritation, and moderate or severe allergic reactions. The most extensively characterized Hymenoptera venoms are bee venoms, mainly from the Apis genus and also from social wasps and ant species. However, there is little information about other Hymenoptera groups. The Apis venom presents high molecular weight molecules - enzymes with a molecular weight higher than...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hymenoptera; Venom; Enzymes; Peptides.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992003000200002
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Implication des peptides antimicrobiens dans l'immunité innée de la moule, Mytilus galloprovincialis ArchiMer
Mitta, Guillaume.
Les mécanismes immunitaires innés des vertébrés sont une mosaïque de mécanismes ancestraux partagés avec des animaux évolutivement plus primitifs. Les peptides antimicrobiens sont une de ces composantes conservées au travers du règne animal. En effet, ils participent vraisemblablement chez tous les métazoaires aux processi d'immunité innée. Toutefois, leurs implications dans la réponse anti-infectieuse peuvent être assez différentes. L'objet de cette thèse était de comprendre comment ces peptides participaient aux processi de défense de la moule. Une première phase de caractérisation biochimique de telles molécules avait été entreprise chez la moule, Mytilus galloprovincialis, dans le cadre de la thèse de Florence Hubert. Notre travail a consisté (i) à...
Tipo: Text Palavras-chave: Immunité; Peptides; Antibiotiques; Moule; Défensine.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00439/55101/56547.pdf
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In vitro activity of phospholipase A 2 and of peptides from Crotalus durissus terrificus venom against amastigote and promastigote forms of Leishmania (L.) infantum chagasi J. Venom. Anim. Toxins incl. Trop. Dis.
Barros,Gustavo A. C.; Pereira,Andreia V.; Barros,Luciana C.; Lourenço Jr,Airton; Calvi,Sueli A.; Santos,Lucilene D.; Barraviera,Benedito; Ferreira Jr,Rui Seabra.
Abstract Background American visceral leishmaniasis is caused by the intracellular parasiteLeishmania (L.) infantum chagasi, and transmitted by the sand fly Lutzomyia longipalpis. Since treatment is based on classical chemotherapeutics with significant side effects, the search for new drugs remains the greatest global challenge. Thus, this in vitro study aimed to evaluate the leishmanicidal effect ofCrotalus durissus terrificus venom fractions on promastigote and amastigote forms of Leishmania (L.) infantum chagasi. Methods Phospholipase A 2 (PLA 2 ) and a pool of peptide fraction (<3 kDa) were purified from Crotalusvenom. Furthermore, promastigotes and peritoneal macrophages of mice infected by amastigotes were exposed to serial dilutions of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: PLA2; Peptides; Crotalus dutissus terrificus; Venom; Leishmanicidal activity.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992015000100351
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Initial peptidomic profiling of Brazilian sea urchins: Arbacia lixula, Lytechinus variegatus and Echinometra lucunter J. Venom. Anim. Toxins incl. Trop. Dis.
Sciani,Juliana Mozer; Emerenciano,Andrews Krupinski; Silva,José Roberto Machado Cunha da; Pimenta,Daniel Carvalho.
Abstract Background Sea urchins can be found throughout the Brazilian coast and are reported to be one of the major causes of marine accidents on the shoreline. Although not lethal, these accidents are reported to be extremely painful. In order to understand the toxinology of the Brazilian urchins, a peptidomic approach was performed aiming to characterize the naturally occurring peptides in both the coelomic fluid and the spine. Methods Animals were collected without gender distinction and samples of the coelomic fluid and spines extracted were analyzed by RP-HPLC and mass spectrometry for peptide de novo sequencing. Results Several peptides were identified either in the coelomic fluid or the spine extract (except for E. lucunter). The peptide...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Peptides; Toxins; Sea urchin; Peptidomics.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992016000100313
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Melittin induces in vitro death of Leishmania (Leishmania) infantum by triggering the cellular innate immune response J. Venom. Anim. Toxins incl. Trop. Dis.
Pereira,Andreia Vieira; Barros,Gustavo de; Pinto,Erika Gracielle; Tempone,Andre Gustavo; Orsi,Ricardo de Oliveira; Santos,Lucilene Delazari dos; Calvi,Sueli; Ferreira Jr,Rui Seabra; Pimenta,Daniel Carvalho; Barraviera,Benedito.
Abstract Background Apis mellifera venom, which has already been recommended as an alternative anti-inflammatory treatment, may be also considered an important source of candidate molecules for biotechnological and biomedical uses, such as the treatment of parasitic diseases. Methods Africanized honeybee venom from Apis mellifera was fractionated by RP-C18-HPLC and the obtained melittin was incubated with promastigotes and intracellular amastigotes of Leishmania (L.) infantum. Cytotoxicity to mice peritoneal macrophages was evaluated through mitochondrial oxidative activity. The production of anti- and pro-inflammatory cytokines, NO and H2O2 by macrophages was determined. Results Promastigotes and intracellular amastigotes were susceptible to melittin...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Melittin; Apis mellifera; Leishmania; Leishmaniasis; Peptides; Toxins; Antiparasitic; Cytokines.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992016000100301
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Nova Estratégia Metodológica para Análise Eletroforética (Tricina-SDS-PAGE), visando à Identificação Peptídeo-proteica em Soja. Infoteca-e
STEPHAN, M. P.; FELBERG, I.; SANTOS, A. A. dos; AZEVEDO, T. de L.; CARRÃO-PANIZZI, M. C..
Recentemente, tem sido mostrado o potencial medicinal de peptídeos bioativos oriundos tanto da soja amarela quanto da preta. Publicações sobre a caracterização molecular de hidrolisados proteicos de soja amarela por eletroforese em gel de poliacrilamida (SDS-PAGE) não mostram a visualização de peptídeos na faixa de 10 kDa e 1 kDa. Nesse trabalho, desenvolveu-se uma nova estratégia metodológica de preparo da amostra, junto com a utilização das eletroforeses dos tipos SDS-PAGE e TRIS/TRICINA. Os extratos parcialmente purificados mostraram a obtenção de um gel límpido contendo cadeias peptídicas-proteicas bem separadas. Como destaque foi evidenciada uma proteína com massa acima de 100 kDa e um peptídeo de 11 kDa, somente para a soja preta. Esta técnica de...
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Caracterização molecular; Extrato de soja; Eletroforese; Proteína; Peptídeo; Tecnologia de Alimento; Food technology; Proteins; Peptides; Soy protein.
Ano: 2019 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1117697
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Nutritional components affecting skeletal development in fish larvae ArchiMer
Cahu, Chantal; Zambonino, Jose-luis; Takeuchi, Toshio.
Marine fish larvae undergo major functional and morphological changes during the developmental stages and several factors can interfere with the normal development of larvae and affect fry quality. Skeletal malformations, such as spinal malformation-scoliosis, lordosis, coiled vertebral column-, missing or additional fin rays, bending opercle or jaw malformations, are frequently observed in hatchery-reared larvae. This paper reviews the effects of some nutritional components on skeletal development in larvae of a number of fish species. In the dietary lipid fraction, for instance, it was proven that the phospholipid concentration affected the spinal malformation rate in sea bass fed a compound diet from mouth opening onwards. Phosphatidylinositol, in...
Tipo: Text Palavras-chave: Retinoic acid; Ascorbic acid; Amino acid; Phospholipid; Peptides; Skeletal development; Quality; Fish larvae.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/publication-443.pdf
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Ontogenèse des fonctions digestives et besoins nutritionnels chez les larves de poissons marins ArchiMer
Cahu, Chantal; Zambonino, Jose-luis.
The production of fish larvae by hatchery shows an intensive increase for several species, but the specific nutritional requirements of larvae were poorly known until some years. We have conducted several experiments aimed to understand the specificities in larvae digestion, and to formulate a compound diet taking into account the differences compared to juveniles. The chosen species was the European sea bass, Dicentrarchus labrax, and the data were validated on different species. Larvae were fed live preys or experimental compound diet, especially formulated for the experiment. It appeared that pancreatic digestive enzymes, such as trypsin and amylase could be assayed in early ontogenesis, before mouth opening, and increase dramatically during the first...
Tipo: Text Palavras-chave: Peptides; Phospholipid; Digestive enzymes; Nutrition; Larvae; Dicentrarchus labrax.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3332.pdf
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