Contactos, Revista de Educación en Ciencias e Ingeniería

Editorial

2025-10-09T12:15:41-05:00

CARACTERIZACIÓN DE MICROPLÁSTICOS EN PLAYA MANZANILLO, ACAPULCO, GRO.

2025-10-09T12:22:05-05:00

Microplastics are a group of synthetic materials, produced from polymers derived from petroleum or biological bases, they are solid particles smaller than 5 millimeters, which are not soluble in water and whose degradability is low (Sherrington et al. 2016).

In Acapulco, the beaches are categorized as sun and sand, however, Manzanillo beach was used as a shipyard and ship cemetery for many decades, causing high levels of pollution from fiberglass polishing dust released into the atmosphere and the dumping of debris, organic solvents to the beach sand, with a high risk of damage to health caused to the neighboring residents of the area and some tourists who ventured to occupy the beach for swimming and resting. This research aims to determine the amount and type of secondary microplastics present in Manzanillo beach. The samples were collected from February to November 2022 following the protocol developed by the Asia-Pacific cooperation. A total of 1100 pieces were registered, 60% being rigid microplastics, blue and green colors were the most abundant during the months of July to September, 30% were flexible with red and transparent colors, finally the pellets presented a 10% abundance and the colors black and white. Therefore, it can be concluded that this beach needs urgent measures for citizen attention and environmental recovery.

GEOFÍSICA O EL ARTE ZAHORÍ

2025-10-09T12:29:58-05:00

Este artículo explora y discute algunas de las diferencias entre el arte zahorí y las técnicas geofísicas para la prospección de agua subterránea. Los zahoríes, basados en percepciones sensoriales y el uso de horquetas o varillas, ofrecen una visión empírica arraigada en la tradición cultural. Sin embargo, algunos estudios han demostrado que su efectividad es aleatoria. En contraste, las técnicas geofísicas se fundamentan en principios físicos sólidos y observaciones medibles. Con esas técnicas se puede, por ejemplo, detectar la presencia de estructuras geológicas capaces de almacenar agua subterránea. Las técnicas geofísicas proporcionan una metodología más precisa y científica, esencial para la gestión eficiente del recurso hídrico en la actualidad.

IMPORTANCIA DEL CUIDADO DE LA SALUD MENTAL MATERNA EN CHIAPAS

2025-10-09T12:37:39-05:00

Maternal mental health care is of great importance because it undergoes physiological and behavioral changes from the beginning of pregnancy until the end of pregnancy, with the arrival of the newborn. In the State of Chiapas, there are 12 recognized indigenous languages; however, the majority of the speaking population speaks only five languages: Tzotzil, Tzeltal, Chol, Zoque, and Tojolabal. Maternal mental health care requires the assistance of native speakers or translators who can help clarify any doubts or fears they experience during pregnancy, childbirth, and the postpartum period. Ensuring good communication between the patient and the attending physician or nurse will establish bonds of trust and security in care. There are few health interventions with native personnel or translators of the different indigenous languages, ensuring proper care for pregnant women.

DE MICROBIOS A ROCAS

2025-10-09T12:44:33-05:00

Microbial biomineralization represents a promising and innovative approach to reducing atmospheric carbon dioxide (CO₂) levels. This natural process is widely observed in various organisms capable of utilizing environmental CO₂ to mineralize it into carbonates, forming biominerals such as shells, spicules, and, in the case of microbes, structures like stromatolites. In this context, microbially induced biomineralization has emerged as a biotechnological strategy for CO₂ capture and storage. This method offers an energy-efficient alternative to physicochemical technologies, using bacterial enzymatic and metabolic activities to convert CO₂ into stable minerals that can be applied in various engineering solutions, including self-healing concrete, heavy metal removal, and soil stabilization. These applications highlight the versatility of biomineralizing microbes in promoting carbon neutrality and mitigating emissions. This promising biotechnology addresses climate change, supports net-zero emissions targets, and fosters community sustainability.

APLICACIÓN DE LOS TARDÍGRADOS EN LA MEDICINA, UNA REVISIÓN

2025-10-09T12:58:56-05:00

Tardigrades are microscopic animals known for their ability to enter cryptobiosis, a state in which they suspend their vital functions to survive extreme conditions. They achieve this state thanks to specialized proteins that provide protection. This article presents a review on the application of tardigrades in medicine, analyzing specialized proteins such as Dsup, which protects the DNA of certain tardigrade species against high levels of radiation. This has sparked interest in medical research. Potential applications are discussed, including the protection of human DNA from radiation and the treatment of human diseases such as cancer, as well as the preservation of biological material, offering new perspectives for medicine.

POSIBLES EFECTOS DE LOS DESECHOS DE GRANJAS AVÍCOLAS EN LA CALIDAD DEL AGUA DE LOS RÍOS DE LA MICROCUENCA DE PASO DE OVEJAS, VERACRUZ

2025-10-09T13:09:32-05:00

The water is a resource of significant importance and of primary need for human beings. However, some human-caused processes can influence water quality. One of the activities that could affect the water quality of rivers and streams are poultry farms. Currently, in the Paso de Ovejas micro-watershed region between the communities of Angostillo and Xocotitla, poultry farms have been under construction. Therefore, the objective of this work is to present the possible effects that bee farms could have on the water quality of the Paso de Ovejas, Veracruz micro-watershed. of Paso de Ovejas, Veracruz. It was found that among the pollutants generated by a poultry farm include animal carcasses, plastic packaging and, in some cases, chicken manure or manure runoff, as well as other types of products such as agrochemicals, disinfectants and veterinary medicines, which could also affect the quality of the soil and ecosystems. For this reason, the government must carry out periodic inspections of these establishments to verify these establishments comply with the requirements of the standard.

HDAC

2025-10-09T13:14:10-05:00

Histone deacetylases (HDACs) are a group of enzymes that play a crucial role in regulating gene expression by modifying the structure of chromatin. They achieve this by removing acetyl groups from histone proteins, which are the proteins around which DNA is wrapped in the cell nucleus. This process is known as deacetylation. Their activity is tightly regulated, and their dysregulation can contribute to diseases, making them significant targets for therapeutic intervention.

La luz que no vemos y las Señales que no escuchamos

2025-10-09T13:17:54-05:00

It is said that the language of nature is mathematics, perhaps for many of us mathematics is not given to us in the best way, we struggle to understand any equation, and even more so to understand theory, however many of the mathematics have helped decipher and understand a whole range of everyday life situations and it is just that, having that ability to understand that language that can take us on an interesting and perhaps exciting adventure, given, for example, that we live in a digital age where signals or waves, travel through space, mostly with information that may seem complex but thanks to mathematics can be decoded, analyzed and give a result.

And it is precisely the field of medicine, where very interesting events have occurred that have to do with signals or light waves that we do not see. It is a journey, a little back in time in a time perhaps not too distant where what was happening inside the human body was not completely known, medicine did not have the necessary equipment to be able to give a diagnosis with certainty and little It was known about the processes of the organs of the human body, such as the brain, blood circulation, etc. Some parts of the human body were half-known, since there were images from the X-ray machine, highly requested for x-rays - this machine produces a type of radiation composed of electromagnetic waves, similar to sunlight, but of great intensity - which have the ability to pass through any object, giving a partial image of the element to be studied - the images, very useful when diagnosing a broken bone and it is even said that in the past, some shoe stores took x-rays to the feet of his clients by simply observing how the foot adjusted to the shoe. And an x-ray is the result of, a two-dimensional image, in which there is no appreciation of depth, this is due to the different densities that the tissues of the human body have.

Antropoentomofagia como mediadora del consumo alimentario sustentable de Chapulines y Grillos en México

2025-10-09T13:24:30-05:00

Anthropoentomophagy, or insect consumption by humans, has been a common practice around the world since ancient times in communities on three continents: Latin America, Asia, and Africa. In the face of global population growth, high poverty rates, food shortages and high costs, coupled with pollution phenomena generated by the livestock and poultry industries, insect consumption is presented as an alternative food, with high nutritional content, low production costs, almost no environmental impact, and that meets the requirement of food safety. Objectives: a) The main objective is to analyze whether entomophagy is a food alternative. b) To identify the socio-cultural aspects involved in the consumption of crickets and grasshoppers. c) To comparatively establish the impact generated by livestock and poultry production compared to the artisanal or industrial production of crickets, achetus, or grasshoppers. d) Analyze the nutritional properties of grasshoppers and their consumption. Results: a) It is important to implement sanitary regulations regarding food safety; b) Food handling, processing, and distribution must be monitored by well-established standards; d) The risk of consuming grasshoppers that live outdoors may be contaminated by pesticides that harm humans. Entomophagy is a viable and sustainable alternative in Mexico, but first it is necessary to spread the hygienic way of its reproduction, feeding and marketing, also to break down the cultural barriers that can be an obstacle related to uses and customs in Mexico.

Dinámica a otro nivel

2025-10-09T13:30:45-05:00

This paper analyses the structure and dynamics of metacommunities, emphasizing that natural communities are dynamic systems and not independent of regional processes. It presents theoretical models of metacommunity organization that describe patterns of this level of organization. These include the Clementsian, Gleasonian, uniform distribution, random and nested sets models. To analyze the structure of metacommunities, three key elements are used: coherence, species turnover and range boundary clustering. These structures would be defined by different combinations of deterministic and stochastic factors that influence the metacommunity structure. These factors would be integrated into the models of patch dynamics, species selection, mass effect and neutral. The metacommunity approach is fundamental to understand and confront processes such as land use change, habitat fragmentation and climate change.

Enfoque bioeconómico para el diseño de estrategias de recuperación ante un contexto climático incierto

2025-10-09T13:36:29-05:00

Overfishing is a global issue exacerbated by climate change. In Mexico, the green abalone fishery represents a deteriorated resource, prompting efforts to rebuild it. Certain fishery areas have been closed through a collaborative decision-making process involving fishing communities and authorities as part of the recovery plan. This study evaluated three exploitation levels under future climate scenarios to guide potential fishery reopening in those zones. A bio-economic model was developed, incorporating the effects of sea surface temperature on abalone population dynamics. Results indicate that fishing effort levels targeting the maximum sustainable yield (MSY), based on historical data, could lead to overexploitation under warming scenarios. Conversely, adopting a lower effort level that balances acceptable returns with conservation objectives may support recovery and serve as a resilient strategy in the face of climate change. Accordingly, recovery strategies should be precautionary, account for multiple sources of uncertainty, and remain adaptable to shifts in stock productivity driven by climate variability.