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Plant alkaloids are critical components of modern medicine and pharmaceuticals. These compounds are also becoming increasingly important for industrial uses as part of the green chemistry revolution. This Special Issue will focus on the molecular advances being made in understanding how such a large and diverse class of compounds are made by plants and how metabolic engineering advances are increasing the overall yield of crucial precursors.

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The chapters of this reprint cover a wide range of topics related to the theoretical aspects of artificial intelligence (AI) and machine learning (ML), as well as their practical applications. The theoretical aspects presented in this reprint are related to model compression, interpretable AI, effective augmentation strategies, time series analysis, etc., but most of the works are applicative and multidisciplinary. The applications include but are not limited to, medical image processing, natural language processing, time series analysis, diffusion model-based music generation, autoencoder applications, and adversarial learning, to name a few. By compiling such a diverse set of articles, the reprint aims to serve as a resource for researchers and AI enthusiasts and to offer them insights into the latest advancements and diverse applications of AI and ML. This reprint includes 26 articles accepted and published in the Special Issue “Artificial Intelligence and Machine Learning Based Methods and Applications, 2023” of the MDPI “Mathematics” journal.

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Global health, conceived as a discipline, aims to train, research and respond to problems of a transboundary nature, in order to improve health and health equity at the global level. The current worldwide situation is ruled by globalization, and therefore the concept of global health involves not only health-related issues, but also those related to the environment and climate change. Therefore, in this Special Issue, the problems related to global health have been addressed from a bibliometric approach in four main areas: environmental issues, diseases, health, education and society.

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Oral health is general health. If the oral cavity is kept healthy, the whole body is always healthy. Bacteria in the oral cavity do not stay in the oral cavity, but rather they travel throughout the body and can induce various diseases. Periodontal pathogens are involved in tooth loss. The number of remaining teeth decreases with age. People with more residual teeth can bite food well and live longer with lower incidence of dementia. There are many viruses in the oral cavity that also cause various diseases. Bacteria and viruses induce and aggravate inflammation, and therefore should be removed from the oral cavity. In the natural world, there are are many as yet undiscovered antiviral, antibacterial and anti-inflammatory substances. These natural substances, as well as chemically modified derivatives, help our oral health and lead us to more fulfilling, high quality lives. This Special Issue, entitled “Biological Efficacy of Natural and Chemically Modified Products against Oral Inflammatory Lesions”, was written by specialists from a diverse variety of fields. It serves to provide readers with up-to-date information on incidence rates in each age group, etiology and treatment of stomatitis, and to investigate the application of such treatments as oral care and cosmetic materials.

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In recent years, there has been a growing need for both nutritional and healthy foods with superior functional properties. In this line, bioactive compounds are economically available in different foods systems with limitations in quality and functionality.The present Special Issue is placed in this context, and aimed to provide a collection of modern chemical strategies developed with the intent of extracting, characterizing, tracing, or authenticating food bioactive compounds. Original research articles dealing with innovative techniques for the extraction (e.g., green chemistry) of bioactive compounds were welcomed. In addition, when discussing modern analytical methods, the structural characterization and identification of these active components were required. Attention was also devoted to theoretical aspects of the determination of the bioactivity and mechanisms of action of food bioactive compounds, as well as challenging properties for application as drug agents. Review articles providing an overview of the latest trends in this area of interest were also very welcomed.

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Scholars in folklore and anthropology are more directly involved in various aspects of medicine

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Terrestrial and marine environments are inexhaustible sources of compounds and active extracts which have been employed in medicine since ancient times. The aim of this reprint is to collect new approaches around compounds and extracts isolated from natural products and their biological activity, with a focus on anti-inflammatory pathways. Thus, this reprint compiles full original papers and reviews articles published during 2023 in a Special Issue of Life, titled “Inflammation and Natural products”. The publications within this reprint are focused on secondary metabolites of plants demonstrating significant antioxidants and anti-inflammatory properties, among others, and clinical relevance in various pathological conditions. It also includes reviews that focus on natural therapies for topics such as arthritis, lung diseases, neuroprotection, skin photoprotection, and the impact of gender in the use of medicinal plants in relation to vascular diseases. The reprint of this Special Issue will serve as a reference text for researchers and academics, as well as those studying natural products and their pharmacological activities.

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Medicinal plants or medicinal herbs have been identified and used since ancient times to improve the sensory characteristics of food. The main compounds found in plants correspond to four major biochemical classes: Polyphenols, terpenes, glycosides and alkaloids. Plants synthesize these compounds for a variety of purposes, including protection of the plant against fungi and bacteria, defense against insects and attraction of pollinators and dispersal agents to favor the dispersion of seeds and pollens.

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The book entitled Medicinal Plants and Natural Product Research describes various aspects of ethnopharmacological uses of medicinal plants; extraction, isolation, and identification of bioactive compounds from medicinal plants; various aspects of biological activity such as antioxidant, antimicrobial, anticancer, immunomodulatory activity, etc., as well as characterization of plant secondary metabolites as active substances from medicinal plants.

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In modern societies the functional differentiation of medicine and religion is the predominant paradigm. Contemporary therapeutic practices and concepts in healing systems, such as Transpersonal Psychology, Ayurveda, as well as Buddhist and Anthroposophic medicine, however, are shaped by medical as well as religious or spiritual elements. This book investigates configurations of the entanglement between medicine, religion, and spirituality in Europe, Asia, North America, and Africa. How do political and legal conditions affect these healing systems? How do they relate to religious and scientific discourses? How do therapeutic practitioners position themselves between medicine and religion, and what is their appeal for patients?

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In the search for a healthier diet and facing the uncertainties about the consumption of artificial additives, the scientific community has explored in the last years the potential of natural compounds, such as polyphenols, carotenoids, chlorophylls, essential oils, tocopherols, vitamins, polysaccharides, among others, obtained from the most diverse sources, such as plants and fungi, for the replacement of the artificial additives in food, which has made these compounds recognized as “natural additives”. In addition to being considered less harmful to health, and giving a certain functional property to a foodstuff, natural additives can also provide a beneficial synergistic effect in the food matrix. For the consumers, diverse studies have been showed that regular ingestion of bioactive compounds, that can be applied as natural additives, can be helpful for the prevention/treatment of several chronic and aging illnesses, such as cardiovascular diseases and neurological disorders. However, there is much to be researched on the viable use of bioactive compounds and to overcome their chemical limitations so that it can actually be used as natural additives in foods. This book addresses, through 18 scientific articles, some natural compounds with potential for use as preservatives, nutritional additives, coloring agents, flavorings, and various agents.

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The consumption of fruits, vegetables, herbs, spices, etc., is thought to be associated with reduced risk for many human diseases, including cancers. Recently, significant advances have been made in evaluating the efficacy of natural products (compounds from natural sources) against human diseases. The purpose of this Special Issue, “Natural Products and Disease Prevention, Relief and Treatment", was to collect manuscripts concerning natural products for treating human diseases. Consequently, we have collected several high-quality manuscripts that focus on the molecular mechanisms of natural products, including their anti-inflammatory, antioxidative, neuroprotective, cardioprotective, antifibrotic, and anticancer effects, as well as other health beneficial effects across a wide range of human diseases. Overall, this Special Issue is an excellent source for information on promising natural products for future preclinical and clinical research into multiple diseases.

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Natural products hold a prominent position in the current discovery and development of drugs and have diverse indications for both human and animal health. Plants, in particular, play a leading role as a source of specialized metabolites with medical effects. Other organisms, such as marine and terrestrial animals and microorganisms, produce very important drug candidate molecules. Specialized metabolites from these varied natural sources can be used directly as bioactive compounds or drug precursors. In addition, due to their broad chemical diversity, they can act as drug prototypes and/or be used as pharmacological tools for different targets. Some examples of natural metabolites that have been developed into useful medical drug are cardiotonic digoxin from Digitalis sp., antimalarial artemisinin from Artemisia annua, anti-cancer taxol from Taxus sp., or podophyllotoxin from Podophyllum peltatum, which served as a synthetic model for the anti-cancer etoposide. The study of natural products is still attracting great scientific attention and their current importance, as a valuable lead for drug discovery, is undebatable. I cordially invite authors to contribute original articles, as well as survey articles, that give the readers of Molecules **MOLECULES NEEDS TO BE ITALICIZED** updated and new perspectives on natural products in drug discovery, including but not limited to natural sources, identification and separation of bioactive phytochemicals, standardization, new biological targets, pre-clinical and clinical trials, pharmacological effects/side effects, and bioassays.

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

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Owls are one of the most fascinating bird families. They have inspired much folklore and superstition worldwide. This book discusses this nocturnal species and their unique physiology and anatomy. It includes owl studies from countries including Bulgaria, Ecuador, Iraq, Slovakia, Syria, and Africa.

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To date, numerous research groups have focused on the study and characterization of herbal extracts to identify numerous plant metabolites that have remarkable effects on biological systems.

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Plant medicines are the original medicines that humans have always used. Many people continue to use plant medicines today including teas, coffee, chocolate, ginger, and other medicines. Traditional medicine is based on plant medicines and is the primary form of medicine for many people throughout the world. The current volume discusses traditional medicines and presents various plant medicines that could be tested in clinical trials. Modern medicine continues to use many drugs that are derived from plants. The current work has much to teach modern medicine about the treatment of several diseases. Traditional healers have used plant medicines to treat psychiatric and other conditions that modern medicine struggles with. Safety issues are always a concern with plant medicines, especially allergies to plant medicines. Clinical trials must be conducted with plant medicines to help bring these traditional treatments into use by modern medicine.

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Plants have served mankind as an important source of foods and medicines. While we all consume plants and their products for nutritional support, a majority of the world population also rely on botanical remedies to meet their health needs, either as their own “traditional medicine” or as “complementary and alternative medicine”. From a pharmaceutical point of view, many compounds obtained from plant sources have long been known to possess bio/pharmacological activities, and historically, plants have yielded many important drugs for human use, from morphine discovered in the early nineteenth century to the more recent paclitaxel and artemisinin. Today, we are witnessing a global resurgence in interest and use of plant-based therapies and botanical products, and natural products remain an important and viable source of lead compounds in many drug discovery programs.This Special Issue on “Plant Natural Products for Human Health” compiles a series of scientific reports to demonstrate the medicinal potentials of plant natural products. It covers a range of disease targets, such as diabetes, inflammation, cancer, neurological disease, cardiovascular disease, liver damage, bacterial, and fungus infection and malarial. These papers provide important insights into the current state of research on drug discovery and new techniques. It is hoped that this Special Issue will serve as a timely reference for researchers and scholars who are interested in the discovery of potentially useful molecules from plant sources for health-related applications.

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This Special Issue provides recent advances in the use of plants for therapeutic purposes. This Special Issue collected the plants, including leaf, fruit, and others. This Special Issue's targets were crude plant extract and active principle purified from the plant. This Special Issue prompted researchers to provide each plant discovery. We are pleased to include in this Special Issue the screened Mexican plants and the halophytic plants growing in central Saudi Arabia, and so on. As a result, we have sparked scientists' interest in studying the plant for therapeutic purposes. This field necessitates network pharmacology analysis and machine-aided learning. Many disorders resistant to modern medication are looking for active principles isolated from the plants all over the world.

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With the development of analytical instruments, the academic system has become more complicated, producing new journals one after another. Therefore, it became much important to clarify what is original of “Medicines”. As the name Medicines indicates, it includes science and practice of caring for a patient and managing the diagnosis, prognosis, prevention, treatment or palliation of their injury or disease. Therefore, Medicines differs from other journals with similar title in that it covers a wide range of fields, from traditional medicine to rapidly developing molecular-targeted drugs, focusing on their pharmacological effects, structure–activity relationships, metabolic pathways, gene expression, using cultured cells, animals, and clinical trials. Most parts of this Special Issue were written by our editorial board members, who described the research topics and how they are engaged in their field of research. All of these articles are their life-long story. We collected a total number of 22 original works by basic researchers and clinical doctors. We hope that readers can get a chance to know the current status of diverse fields of medicines, and what your most important research themes are after reading these articles.

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Overcoming biological barriers is a significant challenge in drug development, and recent advancements in drug delivery systems and technologies offer promising solutions. This Special Issue highlights the innovative approaches and techniques being used to improve drug permeability and absorption, as well as their potential impact on a wide range of therapeutic goals. These advancements being made in drug delivery and permeability offer exciting possibilities to improve patient outcomes.

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Structural and Functional Analysis of Extracts in Plants collects 1 editorial, 3 reviews, and 26 research articles reporting recent research findings which cover several aspects of plant-derived bioactive compounds, to correlate extraction techniques with the chemical composition of extracts and their bioactivity for identifying molecules that might be used as active substances in a wide variety of areas.This book is a valuable resource for members of the scientific community wishing to further explore plants and the therapeutic applications of their bioactive compounds. It will appeal to scholars, teachers and scientists involved in plant product research, and facilitate the development of innovative new drugs.

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