Jesús Aarón Salazar-Leyva

• PhD
• Professor (Full) at Polytechnic University of Sinaloa

A huge number of byproducts and wastes are derived from the processing of fishery resources, which, in the case of teleost fish, can represent up to 70% of the initial biomass. In industry, fishery wastes are destined to produce oil and fishmeal used to elaborate animal feeds. Nevertheless, biomass from fish wastes has an excellent potential to be...

Large quantities of by-products are generated after processing of rose snapper (Lutjanus guttatus), such as viscera, head, tail, skin, and bones, which are considered a potential source of valuable molecules. Therefore, the aim of the present study was the biochemical characterization of alkaline proteases isolated from the intestines of L. guttatu...

This study evaluated the effects on the growth performance and physiological response (metabolism, hematology, and antioxidant capacity) of the juvenile hybrid red tilapia Oreochromis sp. (initial average weight of 2.82 ± 0.02 g) cultured in seawater with biofloc and fed commercial diets containing 25, 35 and 40% crude protein (P25, P35, and P40, r...

Bioestimulantes de subproductos pesqueros con potencial agrícola.

The demand for jellyfish is growing worldwide, especially due to their high nutraceutical value. In this study, the extraction and characterization of crude gelatin from the brown cannonball jellyfish (Stomolophus meleagris), which is periodically found in large volumes on the American Pacific coasts, were carried out. The crude gelatin obtained by...

The dairy industry traditionally uses aspartic proteases from bovine and microbial sources for cheese processing, but there is interest in alternative enzyme sources to supply the large global demand for rennet. This study investigated the biochemical characterization of a partially purified pepsin of yellowfin tuna with milk-clotting activity (MCA...

Amaranth sprouts contain phytochemicals with antioxidant activity that can neutralize free radicals that damage cellular macromolecules and change the stability of cells. In some seeds, phytochemicals content can be enhanced when these are imbibed with an aqueous seaweed extract (ASE). This study evaluated the effect of different concentrations (0....

Protein hydrolysates (PH) bioestimulants are an emerging technology that possess the ability to improve physiological processes such as germination and productivity yield in crops of agronomical importance. The bioestimulant potential on the germination of chickpea by two tilapia-byproducts PH at different degree of hydrolysis (DH) was studied. A f...

The Nile tilapia (Oreochromis niloticus) industry represent the 71% of aquaculture total world production and demands for novel feeds and better proteins. In this sense, Pacific thread herring (Ophistonema libertate) contains high-quality proteins suitable to produce protein hydrolysates (PH) with antioxidant activity for tilapia feeds. In this stu...

For the actual climate crisis, resilient agriculture is required to guarantee access to enough food, in quality and quantity, for a growing population. To face these challenges, innovative agricultural practices under organic or biological concepts for a sustainable crop production are required. To achieve the goal of sustainable agriculture, it is...

La industria procesadora de productos pesqueros, derivado de sus actividades productivas, genera una importante cantidad de residuos líquidos, los cuales son comúnmente conocidos como efluentes pesqueros. Muchos de estos efluentes, son descargados al medio ambiente sin recibir algún tratamiento, generando un impacto negativo en los cuerpos de agua...

PurposeHigh amounts of rich-protein liquid wastes are produced during seafood processing. The effluent called stickwater resulting from the processing of Pacific thread herring (Ophistonema libertate) into fishmeal, was evaluated as protein source to produce bioactive protein hydrolysates by using Alcalase as enzyme source.Methods The effect of deg...

Seafood is regarded as a rich source of high-quality protein and nutraceuticals. Bioactive peptides are a distinctive example of chemicals that can improve the physiological condition of organisms, due to their wide range of biological properties, such as antioxidant, antimicrobial, antihypertensive, antiproliferative, etc. This chapter discusses t...

Revista Deveras- revista de ciencia para niños, en su número titulado "Planta con ciencia" se invita a las niñas y niños a danzar con el sol y los girasoles, también a adoptar un árbol; y a conocer al Chicozapote. Descarga el número gratis a través de la liga (https://comecyt.edomex.gob.mx/deveras-revista-ciencia).

Fish industry by-products can be a source of valuable compounds to apply in agricultural practices. Protein silage of heads, skin, fins, backbones and viscera of Nile tilapia (Oreochromis niloticus) was evaluated as stimulant on the growth of bread wheat sprouts. The tilapia acidic silage showed a lower content of crude lipids (13.5%) and higher co...

Protein hydrolysates from fishery byproducts have resulted to be nutraceutical ingredients with potential to be applied in human nutrition; however, critical quality attributes are dependent on some process parameters such as enzyme source and degree of hydrolysis. This study analyzed the biochemical properties and in vitro antioxidant activity (us...

Enormous quantity of stickwater results from global fishmeal production, which poses as an environmental contaminant if not discarded properly. Despite the industry efforts to recover proteins from stickwater to boost fishmeal quality, this is just one of the possible uses for the significant amount of protein in this effluent. Consequently, this w...

This project aims to obtain and characterize protein hydrolysates from the solid residues (dark muscle) and effluents (cooking water) generated from the processing of yellowfin tuna (Thunnus albacares) and evaluate their potential to be applied as organic fertilizer in farming. From the studied viscera (stomach, pyloric blind, liver, pancreas, and...

Purpose High amounts of rich-protein liquid wastes are produced during seafood processing. The effluent called stickwater resulting from the processing of Pacific thread herring (Ophistonema libertate) into fishmeal, was evaluated as protein source to produce bioactive protein hydrolysates by using Alcalase as enzyme source. Methods The effect of...

Large volumes of liquid waste are generated in processing operations of seafood industry. Such effluents have high concentrations of soluble protein, but it is necessary to concentrate it for utilization. Therefore, the present study investigated the effects of the use of hydrochloric (HCl) and trichloroacetic (TCA) acids on biochemical and antioxi...

Protein hydrolysates from fishery by-products, have resulted to be nutraceutical ingredients with potential to be applied in human nutrition; however, critical quality attributes are dependent of some process parameters such as enzyme source and degree of hydrolysis. This study reports the biochemical properties and antioxidant activity of protein...

The fruit, vegetable, legume, and cereal industries generate many wastes, representing an environmental pollution problem. However, these wastes are a rich source of antioxidant molecules such as terpenes, phenolic compounds, phytosterols, and bioactive peptides with potential applications mainly in the food and pharmaceutical industries, and they...

The fruit, vegetable, legume, and cereal industries generate many wastes, representing an environmental pollution problem. However, these wastes are a rich source of antioxidant molecules such as terpenes, phenolic compounds, phytosterols, and bioactive peptides with potential applications mainly in the food and pharmaceutical industries, and they...

The recovery of proteases from fish viscera could be a strategy to reduce environmental problems caused by inadequate disposal of fish by-products. This study reports the biochemical characterization of proteases isolated from chihuil sea catfish (Bagre panamensis) intestines and the evaluation of their stability to different physical and chemical...

Aqueous seaweed extracts have diverse compounds such as Plant-Growth Regulators (PGRs) which have been utilized in agricultural practices for increasing crop productivity. Algal biomass of Padina durvillaei and Ulva lactuca have been suggested for use as biofertilizers because of plant growth-enhancing properties. This work aimed to identify the ma...

Enormous amounts of by-products and waste are generated during the processing of seafood, sometimes representing about 65% of the raw material employed. Seafood by-products (SB) include solid waste such as skin, head, viscera, trimmings, and bones; however, liquid wastes (effluents) derived from operations such as washing, thawing, cooking and the...

Pacific thread herring (Ophistonema libertate) muscle was hydrolyzed with Alcalase for the preparation of protein hydrolysates. The effect of enzyme concentration (EC; 1% and 3%), pH (8 and 9) and temperature (40°C and 50°C) on some biochemical properties and antioxidant activity (AOXA) was determined. The degree of hydrolysis (DH) ranged between 9...

Rhizoclonium riparium is a filamentous green seaweed widely distributed along the coast of Sinaloa. Unfortunately, this seaweed remains unexploited despite having been described as an important source of bioactive molecules. Guided fractionation based on solvent partitioning is a common approach to screen for new natural bioactive compounds. By app...

Pepsin from stomach of Bagre panamensis was semi-purified and biochemically characterized. The acid proteolytic activity and purification fold were 3875 U/mg protein and 91.85, respectively, after purification process. The optimum pH and temperature for semi-purified protease were 2–3 and 65 °C, respectively. The enzyme activity was stable after he...

The aim of this research is the partial characterization of proteases extracted from B. karatas; the isolation and purification of proteases from B. karatas fruits were achieved using precipitation, separation by size exclusion chromatography and anion-exchange chromatography; molecular mass (MM) was determined, and the effect of inhibitors, reduci...

El objetivo de este estudio, fue determinar la capacidad antioxidante de polisacáridos sulfatados (SPS, por sus siglas en inglés) de las especies de macroalgas Gracilaria vermiculophylla, Rhizoclonium riparium, Caulerpa sertularoides, Codium isabelae, Spyridia filamentosa, y Ulva expansa, recolectadas en el estado de Sinaloa, por los métodos de DPP...

The objectives of the present study were to characterize biochemically the proteases present in gastric juices from adults of the southern king crab (Lithodes santolla) and the Chilean rock crab (Cancer edwardsii), to determine the classes of proteases using specific inhibitors, as well as to evaluate the effect of temperature and pH that affect th...

Plants represent an attractive source of milk-clotting proteases with potential use for chymosin substitution in cheesemaking process. A crude enzymatic extract from B. pinguin fruit showed capacity to clot milk efficiently in a short time. It showed a maximum milk-clotting activity around 4 U/mL in the range of 70-80 ºC. This value indicated that...

Enzymatic extract from B. pinguin fruits were partially characterized by its milk-clotting activity, caseinolytic activities and inhibition studies. Raw enzymatic extract (REE) showed a maximum milk-clotting activity around 65-85ºC, corresponding to 3.99 Soxhlet units·mL-1 , indicating that 1 mL of REE is necessary to clot approximately 400 mL of m...

Plant proteases are capable of performing several functions in biological systems, and their use is attractive for biotechnological process due to their interesting catalytic properties. Bromelia pinguin (aguama) is a wild abundant natural resource in several regions of Central America and the Caribbean Islands but is underutilized. Their fruits ar...

Agave tequilana Weber azul variety is a valuable source of fructans. In this study, a response surface methodology was employed to optimize the extraction yield of fructans from agave pines. A Box Behnken factorial design was applied to evaluate the effects of several conditions such as extraction temperature, water raw material ratio and extractio...

Se presentaron avances de la caracterización bioquímica de la actividad proteolítica presente en extractos digestivos de juveniles de Cichlasoma beani. Se evaluó el efecto de la temperatura, el pH e inhibidores enzimáticos en la actividad proteolítica de organismos mantenidos en cautiverio y silvestres.

Recovery of valuable compounds from by-products generated from seafood processing represents an opportunity to produce value-added products. Sardine acidic proteases were immobilized on partially deacetylated chitin through ionic linkages, using sodium tripolyphosphate as a support activating agent. Maximal enzyme activities of free and immobilized...

Response surface methodology was employed to optimize the immobilization yield of acidic proteases from Monterey sardine (Sardinops sagax caeurelea) using partially deacetylated chitin as immobilization support. A rotatable central composite design was applied to evaluate the effects of immobilization conditions such as enzyme loading (X1), immobil...

Las enzimas proteolıticas poseen un amplio campo de aplicacion en diversas areas de la industria, por lo quela busqueda de estrategias para optimizar su desempe˜no catalıtico es de gran importancia. La inmovilizacion de enzimas en soportes solidos es una tecnologıa que induce cambios a nivel estructural en los sistemas catalıticos inmovilizados, oc...

The aim of this study was to explore the effect of laundry detergents, polar solvents and salts over the catalytic stability of crude proteases extracted from Pacific sierra (Scomberomorus sierra) intestine. The alkaline proteases from sierra retain more than 80% of its proteolytic activity after incubation for 1 hour at 40°C with commercial deterg...

Proteolytic enzymes have a wide range of applications in different industrial fields therefore the development of strategies focused in the optimization of their catalytic performance is a topic of great interest. Enzyme immobilization onto solid supports induces changes at structural level in the immobilized systems, and consequently some reaction...

Solid wastes generated from the seafood industry represent an important environmental pollutant; therefore, utilization of those wastes for the development of processing biochemical tools could be an attractive and clean solution for the seafood industry. This study reports the immobilization of semi-purified acidic proteases from Monterey sardine...

The effect of three protein sources (sardine-based diet, squid-based diet and commercial diet) in feed on white shrimp (Litopenaeus vannamei) growth, muscle collagen, collagenase activity and shear force was determined. Shrimp fed on diets with squid and sardine protein exhibited greater growth (p<0.05) than those fed with commercial feed. Shrimp m...