Lorenzo Antonio Picos Corrales

Universidad Autónoma de Sinaloa · Facultad de Ingeniería Culiacán

Pollution of rivers and streams is primarily the result of human activities, leading to significant environmental damage and health risks. Despite industrial-scale activities and inadequate wastewater treatment, many regions still maintain lenient policies regarding the permissible limits of contaminants in water bodies. This pollution causes chemi...

The development of formulations from plant or animal extracts and polymeric platforms has been well established toward emulsion-based delivery systems, avoiding the use of conventional surfactants. This approach involves the stabilization of poorly water-soluble extracts by polymers, improving their dispersion into food and pharmaceutical products,...

Wastewater containing polluting nanoparticles during purification is an emerging concern that has created the need to develop more efficient methodologies of wastewater treatment. Therefore, this contribution provides a study regarding the removal of gold and silver nanoparticles stabilized with poly(vinylpyrrolidone) (AuNP-PVP and AgNP-PVP) using...

A new copper(II) coordination polymer was synthesized from the l-isoleucine-Schiff base and characterized by elemental analysis, Fourier transform infrared (FT-IR) spectroscopy, ultraviolet-visible (UV-vis) spectroscopy, single-crystal X-ray diffraction (XRD) analysis, electronic paramagnetic resonance, and thermogravimetric analysis. XRD analysis...

Active compounds (e.g., drugs and food ingredients) help to improve the quality of life around the world. In order to increase the effectiveness in each intended application, research groups have worked under the motivation of demonstrating that the encapsulation helps protect guest compounds against premature degradation and can enhance their tran...

Insects from the Orthoptera order possess important biological activities such as wound healing and represent a therapeutic resource in traditional medicine worldwide. Hence, this study addressed the characterisation of lipophilic extracts from Brachystola magna (Girard), identifying compounds with potential healing properties. For that, four extra...

Pharmaceuticals help humans to improve their quality of life. For this reason, it is necessary to use them in minimal quantities, achieving the therapeutic effect. The use of organic platforms for nanoencapsulation of bioactive compounds is focused on overcoming the drawbacks of conventional drug delivery approaches. These nanocarriers protect bioa...

Public health, production and preservation of food, development of environmentally friendly (cosmeto-)textiles and plastics, synthesis processes using green technology, and improvement of water quality, among other domains, can be controlled with the help of chitosan. It has been demonstrated that this biopolymer exhibits advantageous properties, s...

Mexican oregano (Lippia graveolens) polyphenols have antioxidant and anti-inflammatory potential, but low bioaccessibility. Therefore, in the present work the micro/nano-encapsulation of these compounds in two different matrixes of chitosan (CS) and chitosan-b-poly(PEGMA2000) (CS-b-PPEGMA) is described and assessed. The particle sizes of matrixes o...

Water contamination by emerging contaminants is increasing in the context of rising urbanization, industrialization, and agriculture production. Emerging contaminants refers to contaminants for which there is currently no regulation requiring monitoring or public reporting of their presence in our water supply or wastewaters. There are many emergin...

The rise of emerging contaminants in waters challenges the scientific community and water treatment stakeholders to design remediation techniques that are simple, practical, inexpensive, effective, and environmentally friendly. Emerging contaminants include antibiotics, hormones, illicit drugs, endocrine disruptors, cosmetics, personal care product...

REVISTA INGENIERÍA Y TECNOLOGÍA UAS (ISSN : 2683-2445). Facultad de Ingeniería Culiacán, UAS . http://revistaingenieria.uas.edu.mx/index.php/RIC/article/view/20. R E S U M E N: Actualmente, la contaminación de los cuerpos de agua y su relación con los riesgos de la salud humana es uno de los principales problemas alrededor del mundo. Algunos proces...

Water pollution by emerging contaminants has become a major source of concern and a priority for society and public authorities. Emerging contaminants are a group of natural and synthetic chemicals and biological agents that are not routinely monitored or regulated in the environment and may have known or suspected adverse effects on the environmen...

Over the past two decades, the presence of so-called emerging contaminants in various environmental compartments around the world, such as water, sediments, soils and atmosphere, and in a wide variety of consumer products has become a major concern for society, public health authorities, industry (namely food industry and water sector) and the agri...

Catalytic propane dehydrogenation is an attractive method to produce propylene while avoiding the issues of its traditional synthesis via naphtha steam cracking of naphtha. In this contribution, a series of Pt-Sn/SBA-16 catalysts were synthesized and evaluated for this purpose. Bimetallic Pt-Sn catalysts were more active than catalysts containing o...

The last name of one of the co-author of this chapter was initially published with error. The correct presentation is given here.

Currently, there is still a demand concerning processes for appropriate treatment of wastewater containing toxic heavy metals and emerging contaminants (pharmaceuticals and pesticides). Regarding that, water remediation can be enhanced by the development of next-generation flocculants that may tackle the current need. Therefore, this study addresse...

Currently, there is a growing interest in the development of suitable methods for the preparation of eco-friendly and biocompatible materials in order to increase the environmental protection and reduce human health risk. Therefore, this mini-review summarizes several studies involving lactides and lactones as monomers for the synthesis of biodegra...

The use of emulsions at industrial scale involves simple, efficient and versatile applications. Currently, it is preferred the exploitation of biopolymers such as modified starch that may be used as suitable wall materials, avoiding toxic surfactants during preparation. Therefore, in this work, modified amaranth starch with improved physicochemical...

The quinazoline-2,4-diones scaffold is found in bioactive compounds, commercial drugs and exhibit important biological activities. However, their antidiabetic activity is rarely explored. For this purpose, an easy one-pot three-components and straightforward synthesis of 3-substituted quinazoline-2,4-diones was designed, in both, the catalyst- and...

Introduction Overconsumption of sucrose has been associated with negative metabolic effects related to non‐communicable diseases. However, this relationship continues to be a controversial topic and further studies are needed to generate scientific evidence to help clarify existing questions and which can be used in the future for the implementatio...

Currently, there is a growing concern regarding water remediation from agricultural and domestic wastewaters. Among water treatment methods, flocculation is a widely used approach. In this study, the bioflocculation of wastewaters from Sinaloa (Mexico) was examined using two bioflocculants: chitosan and bean straw flour (BSF). The jar-test results...

Overconsumption of sucrose, the main contributor of the total added sugar intake in the world, has been associated with negative metabolic effects related to non-communicable diseases. However, this relationship continues to be a controversial topic and further studies are needed. The aim of this study was to evaluate the sucrose-enriched diet cons...

Coagulation/flocculation is a major phenomenon occurring during industrial and municipal water treatment to remove suspended particles. Common coagulants are metal salts, whereas flocculants are synthetic organic polymers. Those materials are appreciated for their high performance, low cost, ease of use, availability and efficiency. Nonetheless, th...

Coagulation-flocculation is a major process allowing to remove suspended particles from municipal and industrial wastewater. This process commonly involves metal salts as coagulants and synthetic organic polymers as flocculants. Although those chemicals are cheap, efficient, available and easy to use, they have drawbacks such water pollution by met...

Nanocarriers based on amphiphilic block copolymers, with tailored temperature and pH responsiveness, were prepared. The hydrophilic blocks consist of temperature-sensitive [N-isopropylacrylamide (NIPAAm)] or NIPAAm plus pH-sensitive units [5-methacryloyloxy pentatonic acid (5MPA) or 4-methacryloyloxy benzoic acid (4MBA)], while the hydrophobic bloc...

This work shows an optimized enzymatic hydrolysis of high molecular weight potato galactan yielding pectic galactan-oligosaccharides (PGOs), where endo-β-1,4-galactanase (galactanase) from Cellvibrio japonicus and Clostridium thermocellum was used. For this, response surface methodology (RSM) by central composite design (CCD) was applied. The param...

This work shows the valorization of marine microalgae protein wastes (MMPW), generated from biodiesel production, by obtaining a substrate that can be metabolized for ethylene production. MMPW were hydrolyzed with H2SO4 diluted to get both sugars and amino acids. This hydrolyzate was adapted for the growth of Pseudomonas savastanoi pv. glycinea. Re...

This microreview covers the newest methods for the synthesis of quinazolin-4(3H)-ones published between 2017 and 2018. The synthetic methods primarily involve the use of a metal catalyst. However, few metal-free synthetic pathways are also addressed.

[Figure not available: see fulltext.][InlineMediaObject not available: see fulltext.] This microreview addresses relevant data of current studies involving the exploitation of cyclic acetals in the design of degradable synthetic polymers. Two approaches are presented: polymerization of cyclic acetal units and formation of cyclic acetal units after...

Propylene is one of the most important commodity chemicals. Its future demand is expected to exceed its production. Alternative routes to obtain this product need to be implemented. Dehydrogenation of propane assisted with catalyst is a promising route to meet demands. The Pt and Cr supported catalysts are amongst the most effective possibilities....

The aim of this contribution is to provide a comprehensive comparison between chitosan and Moringa oleifera seed flour (MOSF) as coagulant-flocculants. MOSF was obtained as a byproduct in a biodiesel process. Turbidity and heavy metal ion removal, using both eco-friendly materials, was assessed. Jar tests were performed on samples taken from river...

Benzoxazinediones exhibit potential as versatile synthons in the synthesis of wide variety of heterocyclic compounds with biological activity. In this work, an efficient and eco-friendly one-step synthesis of benzoxazine-2,4-diones from phthalic anhydrides derivatives and trimethylsilyl azide using the microwave technique was developed and compared...

Nanogels based on sensitive poly(N‐vinylcaprolactam) copolymerized with either vinylpyrrolidone or 2‐methacryloyloxybenzoic acid were prepared. The antineoplasic drug 5‐fluorouracil was loaded and delivered. Nanogels having polyethyleneglycol to provide a biocompatible shell. https://doi.org/10.1002/pola.27901.

Sensitive nanohydrogels were prepared via surfactant free emulsion copolymerization of N-vinylcaprolactam and poly(ethylene glycol) methyl ether methacrylate, and either N-vinylpyrrolidone (VP) or 2-methacryloyloxybenzoic acid (2MBA) to adjust the transition temperature (Ttr). The crosslinker ethylene glycol dimethacrylate was used for the polymer...

Flocculants based on responsive polymers were synthesized by means of free radical polymerization in aqueous environment at 25 °C. Poly(N-isopropylacrylamide) (PNIPAAm), statistical copolymers from NIPAAm and either acrylamide (AAm) or acrylic acid (AAc), and a copolymer composed of the three different monomers were prepared. These materials were c...

This work demonstrates that Jatropha cinerea (J. cinerea) seed oil has potential as a new, non-conventional, bio-energy resource. The physical and chemical properties of J. cinerea seeds, collected from its natural habit, were evaluated. The length-, diameter- and weight- of seeds were in the ranges of 8 to 12 mm, 7.5 to 11 mm, and 0.2 to 0.7 g, re...

Sensitive nanohydrogels based on micellar aggregates from amphiphilic block copolymers were synthesized by means of electron beam irradiation. The crosslinked shell consists of temperature sensitive [N-isopropylacrylamide (NIPAAm)] and pH sensitive [5-methacryloyloxy pentatonic acid (5MPA) or 4-methacryloyloxy benzoic acid (4MBA)] units, while the...

A synthetic methodology is described for the preparation of core–shell nanogels by reversible addition-fragmentation chain transfer. Well-defined macro chain transfer agents (macro-CTA's) were prepared in a first step using monomers that yield sensitive polymers. In the second step, a crosslinker alone or with the addition of a functionalized comon...

Stimuli-responsive nanogels were prepared starting with amphophilic block copolymers that were crosslinked in the micellar state by means of electron beam irradiation. The materials were thoroughly characterized by dynamic and static light scattering before and after the irradiation. The effect of the irradiation dose and the polymer concentration...

Reversible addition-fragmentation chain transfer (RAFT) polymerization is used to prepare temperature- and pH-sensitive statistical copolymers with lower critical solution temperature (LCST) close to 38 °C at pH 7.4 based on N-isopropylacrylamide and methacrylic acid derivative comonomers with a pKa close to 6. Statistical copolymers are re-activat...

The cover, taken from the article of A. Licea‐Claveríe et al., p. 56, shows a scheme for the preparation of core crosslinked stars polymers via controlled radical polymerisation (RAFT‐methodology). https://doi.org/10.1002/masy.200990023.

In this contribution we report the use of the RAFT-technique for the preparation of three types of responsive polymeric materials with a high potential of application in the biomedical field: 1.-Diblock copolymers with reversible self-assembly capacity as a function of pH based on N,N′-diethylaminoethyl methacrylate (DEAEM) and 2-methacryloyloxy be...