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Book
Chemical Composition and Biological Activities of Essential Oils
Authors: ---
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Essential oils extracted by the distillation or hydrodistillation of aromatic plants are a complex mixture of volatile compounds with several biological activities. Their efficacy as antimicrobial agents is related to the activity of several natural compounds belonging to different chemical families that can act both in synergy with each other and with other antibiotics. The antibiotic resistance detected among pathogens has been quickly increasing in recent years, and the control of some of these microorganisms is becoming a planetary emergency for human and animal health. The control of the microbial growth is a problem of great importance also for the food industry (food deterioration and shelf life extension) and for the world of cultural heritage (indoor and outdoor phenomena of biodeterioration). Essential oils can play an important role in this scenario, due their recognized broad-spectrum antimicrobial activity. Therefore, the main subject of this Special Issue includes an essential oil-based approach to control microrganisms in areas such as human and veterinary medicine, entomology, food industry and agriculture. In addition, the chemical composition of essential oils from endemic and rare medicinal/aromatic plants, nanoformulations of essential oils, applications in human and veterinary medicine and its use as animal feeding supplements are topics covered in this Special Issue


Book
Model of the response function of CUORE bolometers : doctoral thesis accepted by Dipartimento di Fisica, Sapienza Universita di Roma, Rome Italy
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ISBN: 9400712316 9400712324 Year: 2011 Publisher: Dordrecht, The Netherlands : Springer,

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The neutrino is probably the most elusive elementary particle discovered so far. Its mass is very small and still unknown, and it is considered a key quantity in many theories beyond the Standard Model of particle physics. The smallness of the mass could be explained if neutrinos are, unlike all other particles, equal to their own antiparticles, thus following the conjecture of E. Majorana. The double beta decay without emission of neutrinos is a nuclear process that can happen only if the neutrino is a Majorana particle. Observation of this decay would therefore necessarily imply that neutrinos are Majorana particles and would set the mass scale, a breakthrough in our understanding of nature. The CUORE experiment will search for the neutrinoless double beta decay in 130Te, using 1 ton of TeO2 bolometric detectors. Bolometers are calorimeters that operate at cryogenic temperatures, able to measure the temperature rise produced by the energy release of an impinging particle. They feature good resolution and low background, making them excellent detectors to search for rare decays. The performances of the experiment are currently limited by temperature instabilities of the bolometers and by a poor understanding of their data. Mea­suring the energy deposited by a particle, in fact, is complicated and the shape of the signal depends on the energy. In this thesis a model of the signal of TeO2 bolometers is developed. It is able to explain the origin of the unwanted features that would limit the performances of CUORE. The application of the model to data from test bolometers led to great improvements of the results in terms of energy resolution, energy calibration, and signal shape discrimination. This thesis has been awarded at the Department of Physics, Universita di Roma - La Sapienza, Italy. With a Foreword by Professor Fernando Ferroni.


Book
Novel Approaches to Minimising Mycotoxin Contamination
Authors: ---
ISBN: 3039289381 3039289373 Year: 2020 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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Contamination of foods and agricultural commodities by various types of toxigenic fungi is a concerning issue for human and animal health. Moulds naturally present in foods can produce mycotoxins and contaminate foodstuffs under favourable conditions of temperature, relative humidity, pH, and nutrient availability. Mycotoxins are, in general, stable molecules that are difficult to remove from foods once they have been produced. Therefore, the prevention of mycotoxin contamination is one of the main goals of the agriculture and food industries. Chemical control or decontamination techniques may be quite efficient; however, the more sustainable and restricted use of fungicides, the lack of efficiency in some foods, and the consumer demand for chemical-residue-free foods require new approaches to control this hazard. Therefore, food safety demands continued research efforts for exploring new strategies to reduce mycotoxin contamination. This Special Issue contains original contributions and reviews that advance the knowledge about the most current promising approaches to minimize mycotoxin contamination, including biological control agents, phytochemical antifungal compounds, enzyme detoxification, and the use of novel technologies.

Keywords

n/a --- decontamination --- superheated steam --- quercetin glycosides --- antagonism --- mode of action --- corn --- Botrytis sp. --- AITC --- binding --- degradation --- brine shrimp bioassay --- apple pomace --- nanoparticles --- enzymatic detoxification --- Bacillus --- estrogen response element --- Fusarium --- biological detoxification --- abiotic factors --- stability --- fumonisin esterase FumD --- mycotoxigenic fungi --- Aspergillus flavus --- Aflatoxin M1 --- Fusarium graminearum --- milk --- Penicillium digitatum --- biocontrol agents --- biological control --- dry-cured ham --- mycotoxin reduction --- Fusarium sp. --- enzyme kinetics --- Penicillium nordicum --- Satureja montana --- roasted coffee --- fermentation --- crisp biscuit --- detoxification --- essential oils --- gene expression --- probiotics --- zearalenone --- mycotoxins --- degradation products --- Geothrichum citri-aurantii --- garlic-derived extracts --- Zearalenone --- biodegradation --- EU limits --- storage --- Origanum virens --- aflatoxin --- fungal growth reduction --- green chemistry --- Penicillium italicum --- deoxynivalenol --- ?-Fe2O3 --- ochratoxin A (OTA) --- wheat --- cell-free extracts of Aspergillus oryzae --- photocatalysis --- wheat quality --- post-harvest phytopathogen --- cold plasma --- pinnatifidanoside D --- ochratoxin A --- oats --- cell proliferation --- estrogen receptor --- Penicillium verrucosum --- pig production performance --- phloridzin --- maize --- biotransformation --- fumonisin --- fungi


Book
Aggregatibacter actinomycetemcomitans-Gram-Negative Bacterial Pathogen
Authors: ---
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Aggregatibacter actinomycetemcomitans is a well-studied Gram-negative bacterium that can often be found in the oral cavity of young individuals. It has several virulence factors and a large genetic diversity, which results in both harmless and highly virulent genotypes. To determine the virulence potential of the isolated bacteria, genetic profiling is recommended. Advanced knowledge of the virulence mechanisms induced by this bacterium is important for the development of future personalized preventive and treatment strategies. The fifteen papers in this book provide a strong and relevant background that can contribute to the improvement of future diagnosis and research strategies.


Book
Isolation and Identification of Bioactive Secondary Metabolites
Authors: ---
Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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The health benefits of food, plants, fruits, and seaweeds stem from the biological activities of their constituents—namely, secondary metabolites. The study of secondary metabolites and their potential to treat and/or prevent a number of diseases has become a research topic of growing interest for biologists, pharmacists, and chemists. Notably, in order to propose a compound as a potential new drug with pharmacological effects, the chemical structure of this compound and its biological activity against a given target must be well established. The Special Issue, “Isolation and Identification of Bioactive Secondary Metabolites”, considers species beyond their nutritional value and identifies instances of wider and more efficient use, thereby contributing to a more sustainable management of natural resources. The fifteen articles published in this Special Issue reflect the latest research trends, and consider the isolation, identification, and assessment of the beneficial effects of secondary metabolites from both edible and inedible species. Thus, these contributions collectively demonstrate that these compounds, and their plants of origin, should be valued beyond their nutritional benefits.

Keywords

coumarins --- Lycium --- metabolomic --- HPLC-MS --- orbitrap --- secondary metabolites --- endemic plants --- olive leaves --- supercritical fluid extraction --- antioxidants --- hyperuricemia --- plant-based functional food --- xanthine oxidase --- adenosine deaminase --- uric acid transporter --- bioactive compound --- Piper pseudoarboreum --- bioassay-guided fractionation --- leishmanicidal activity --- alkamides --- (E)-piplartine --- Wedelia chinensis --- organic farming --- phytotoxic substances --- vanillic acid --- gallic acid --- Origanum subspecies --- morphological traits --- glandular trichomes --- essential oil composition --- rosmarinic acid --- sensory evaluation --- colored potato tubers --- total phenols --- anthocyanins --- saccharides --- nutrition --- microelements --- plants --- fungi --- food supplements --- cardiovascular diseases --- neurodegenerative diseases --- Alzheimer’s disease --- metabolic syndrome --- apocarotenoid --- caffeic acid derivative --- flavonoid --- Lactuca sativa --- lignan --- megastigmane --- sesquiterpene lactone --- 1,2,3,4-tetrahydro-β-carboline-3-carboxylic acid --- black chokeberry --- anthocyanin --- simulated moving bed --- antioxidant activity --- neuroprotection --- Artemisia --- clinical trials --- health effects --- adverse effects --- anticancer --- antiparasitic --- artemisinin --- santonin --- achillin --- tehranolide --- Aglaomorpha quercifolia --- GC-MS profile --- rhizome --- leaves --- n-hexane extract --- fatty acids --- terpenoids --- linolenic acid --- hop-16-ene --- cardiac glycosides --- secondary plant metabolites --- natural product isolation --- hyrcanoside --- deglucohyrcanoside --- ouabain --- cymarin --- digitoxin --- anticancer activity --- Na+/K+-ATPase inhibitors --- corn salad --- leafy vegetables --- phytochemicals --- liquid chromatography --- mass spectrometry --- celastrol --- Celastraceae --- antimicrobial activity --- mechanism of action --- Bacillus subtilis --- n/a --- Alzheimer's disease


Book
Environmentally Friendly Polymers and Polymer Composites
Authors: --- --- --- ---
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Continuous research advances have been observed in the field of environmentally-friendly polymers and polymer composites due to the dependence of polymers on fossil fuels and the sustainability issues related to plastic wastes. This book compiles the most recent research works in biopolymers, their blends and composites, and the use of natural additives, such as vegetable oils and other renewable and waste-derived liquids, with their marked environmental efficiency devoted to developing novel sustainable materials. Therefore, Environmentally Friendly Polymers and Polymer Composites provides an overview to scientists of the potential of these environmentally friendly materials and helps engineers to apply these new materials for industrial purposes.

Keywords

PLA --- PCL --- TPS --- biopolymer blends --- mechanical properties --- compostable plastics --- green composites --- natural fillers --- poly(butylene succinate) (PBS) --- almond shell flour (ASF) --- poly (lactic acid) (PLA) --- poly(butylene succinate-co-adipate) (PBSA) --- binary blends --- shape memory behaviour --- polymer‒matrix composites (PMCs) --- thermomechanical --- electron microscopy --- compatibilizers --- poly(lactic acid) (PLA) --- natural fibre (NF) --- nano-hydroxyapatite (nHA) --- flammability --- crab shell --- chitin --- spherical microgels --- reverse micelle --- gelation --- chitosan (CS) --- anti-oxidant --- anti-apoptotic activity --- rotenone --- Parkinson’s disease (PD) --- composite materials --- hybrid resin --- natural reinforcement --- non-uniformities --- mechanical behavior --- antifungal activity --- dendrimer --- Origanum majorana L. essential oil --- Phytophthora infestans --- maleinized linseed oil MLO --- poly(lactic acid) --- diatomaceous earth --- biocomposites --- active containers --- polymer mixtures --- blends --- cashew nut shell liquid (CNSL) --- polypropylene --- high impact polystyrene --- compatibilization --- PHB --- PHBV --- rice husk --- biosustainability --- waste valorization --- bacterial cellulose --- natural rubber --- reinforcing --- biodegradable polymers --- Arboform --- epoxidized oil --- maleinized linseed oil --- toughness --- thermal stability --- pectin --- food packaging --- active compounds --- agro-waste residues --- circular economy --- graphene oxide --- size selection --- sodium alginate --- bio-based polymers --- biodegradable polyesters --- wood plastic composites --- natural additives and fillers --- composites characterization --- bioplastics manufacturing

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