You're using an outdated browser. Please upgrade to a modern browser for the best experience.
Subject:
All Disciplines Arts & Humanities Biology & Life Sciences Business & Economics Chemistry & Materials Science Computer Science & Mathematics Engineering Environmental & Earth Sciences Medicine & Pharmacology Physical Sciences Public Health & Healthcare Social Sciences
Sort:
Most Viewed Latest Alphabetical (A-Z) Alphabetical (Z-A)
Filter:
All Topic Review Biography Peer Reviewed Entry Video Entry
Topic Review
Inferred Mechanical Forces Taking Place in the Bud
Floral organs develop within a bud enclosed by previously formed organs, leaves, and axes. The tight junction among structures and the observation of contact margins and associated shapes in the bud suggest the influence of forces on the flower configuration. The rationale here is that the sections of the floral bud that are under higher pressure are delayed in the inception and growth of an organ or prevented from initiating, while areas with less pressure would have a more rapid organ initiation and growth. The occurrence and reach of these forces can be categorized as: 1. Effects of bracts and inflorescence axis pressing against the flower meristem; 2. Effects of involucra in flowers, floral units, and inflorescences; 3. Within-flower organ interaction.
  • 834
  • 06 Apr 2022
Topic Review
Camelina sativa as an Allelopathic Potential Cover Crop
Camelina sativa, known for its high oil content and adaptability to diverse climatic conditions, exhibits allelopathic potential by releasing chemical compounds that inhibit weed growth. The crop’s vigorous growth and canopy architecture contribute to effective weed suppression, reducing the prevalence and spread of associated pathogens. Furthermore, the chemical compounds released by camelina through the solubilization of compounds from leaves by rain, root exudation, or deriving from microbial-mediated decay of camelina’s tissues interfere with the growth of neighbouring plants, indicating allelopathic interactions. The isolation and identification of benzylamine and glucosinolates as allelochemicals in camelina highlight their role in plant–plant interactions. 
  • 790
  • 31 Aug 2023
Topic Review
Cell of Origin and Pathogenesis of FL Transformation
The gold standard for determining follicular lymphoma (FL) transformation is based on the histologically confirmed progression of grade 1, 2, or 3A FL to a high-grade lymphoma, consisting of a predominance of large cells and the loss of the follicular architecture. Histological transformation (HT) to a more aggressive disease–mostly diffuse large B-cell lymphoma–is considered one of the most dismal events in the clinical course of FL.
  • 781
  • 27 Oct 2022
Topic Review
Gastrointestinal Disorders Involving ICCs and the ENS
The enteric nervous system (ENS) is organized into two plexuses—submucosal and myenteric—which regulate smooth muscle contraction, secretion, and blood flow along the gastrointestinal tract under the influence of the rest of the autonomic nervous system (ANS). Interstitial cells of Cajal (ICCs) are mainly located in the submucosa between the two muscle layers and at the intramuscular level. They communicate with neurons of the enteric nerve plexuses and smooth muscle fibers and generate slow waves that contribute to the control of gastrointestinal motility. They are also involved in enteric neurotransmission and exhibit mechanoreceptor activity. A close relationship appears to exist between oxidative stress and gastrointestinal diseases, in which ICCs can play a prominent role. Thus, gastrointestinal motility disorders in patients with neurological diseases may have a common ENS and central nervous system (CNS) nexus. In fact, the deleterious effects of free radicals could affect the fine interactions between ICCs and the ENS, as well as between the ENS and the CNS.
  • 754
  • 25 Apr 2023
Topic Review
GPx8
This entry aimed to illustrate the presence of glutathione peroxidase 8 (GPx8) in rat during preimplantation period of pregnancy. Females were killed on first (D1), third (D3), and fifth (D5) day of pregnancy. The presence of GPx8 in embryos was detected under the confocal microscope, the presence of GPx8 in genital organs was confirmed immunohistochemically, and the amount of GPx8 was determined using densitometry. We found that GPx8 is dispersed in the cytoplasm of oocytes, while after fertilization, it is concentrated in granules. From 4-cell stage till blastocyst, GPx8 reaction was found in the perinuclear region. In the ovary, GPx8 was seen in granulosa-lutein cells, in plasma of blood vessels, and inside Graafian follicles. In oviduct, GPx8 was detected in the plasma and in the extracellular matrix (ECM). Moreover, epithelial cells of isthmus were positive. In uterus, GPx8 was observed in the uterine glands, in the plasma, and in ECM. On D5, the enzyme disappeared from the uterine glands and appeared in fibroblasts. Densitometry revealed that the highest amount of GPx8 was on D1 and subsequently declined. To auhotr's knowledge, this is the first entry describing GPx8 presence in the oocytes, preimplantation embryos, and female genital organs in mammals. Our results improve the understanding of antioxidant enzymes presence during pregnancy in defense against oxidative stress, which is considered to be one of the main causes of infertility.
  • 746
  • 26 Oct 2020
Topic Review
Sjögren’s Syndrome Lymphomagenesis
Sjögren’s Syndrome (SS) is a chronic autoimmune disorder characterized by focal mononuclear cell infiltrates that surround the ducts of the exocrine glands, impairing the function of their secretory units. Compared to other autoimmune disorders, SS is associated with a notably high incidence of non-Hodgkin lymphoma (NHL) and more frequently mucosa associated lymphoid tissue (MALT) lymphoma, leading to increased morbidity and mortality rates. High risk features of lymphoma development include systemic extraepithelial manifestations, low serum levels of complement component C4 and mixed type II cryoglobulinemia. The discrimination between reactive and neoplastic lymphoepithelial lesion (LEL) is challenging, probably reflecting a continuum in the evolution from purely inflammatory lymphoid infiltration to the clonal neoplastic evolution. Early lesions display a predominance of activated T cells, while B cells prevail in severe histologic lesions. This strong B cell infiltration is not only a morphologic phenomenon, but it is also progressively associated with the presence of ectopic germinal centers (GCs). 
  • 743
  • 08 Dec 2020
Topic Review
Massage Therapy Effects on Sport and Exercise Performance
A massage is a tool that is frequently used in sports and exercise in general for recovery and increased performance. Massages, in general, do not affect motor abilities, except flexibility. However, several studies demonstrated that positive muscle force and strength changed 48 h after the massage was given. Concerning neurophysiological parameters, the massage did not change blood lactate clearance, muscle blood flow, muscle temperature, or activation. However, many studies indicate pain reduction and delayed onset muscle soreness, which are probably correlated with the reduction of the level of creatine kinase enzyme and psychological mechanisms. In addition, the massage treatment led to a decrease in depression, stress, anxiety, and the perception of fatigue and an increase in mood, relaxation, and the perception of recovery.
  • 741
  • 15 Jun 2023
Topic Review
Commonly Used Nanoparticles in Cancer Diagnosis
The application of nanoparticles in clinical diagnostics is called nanodiagnostics. Nanotechnology has developed to improve clinical diagnostics due to its increased sensitivity and capability for early cancer detection. There are several kinds of nanomaterials used in cancer diagnosis such as quantum dots, polymeric nanoparticles, carbon nanotubes, and dendrimers. To enhance the cancer detection capabilities of nanoparticles, they can be conjugated with aptamers, carbohydrates, antibodies, peptides, and other small molecules that specifically target molecules to reach the intended site. Studies have been conducted that used gold nanoparticles for cancer diagnosis. The use of Au-doped nanoparticles showed extraordinarily high luminescence intensity. Additionally, fluorescence has been utilized to detect the cancer biomarker CEA through color visualization.
  • 735
  • 07 Apr 2023
Topic Review
Role of Liquid–Liquid Phase Separation in Cardiovascular Diseases
Liquid–liquid phase separation (LLPS) is a biochemical process in cells that can drive proteins, RNA, and other molecules to concentrate into droplets. These droplets do not have a lipid membrane but rather exist as distinct organelles relative to the surrounding environment, and act as biochemical reaction chambers. Significant progress has been made in the study of LLPS, especially in the neurodegenerative disease, cancer, and virology fields, but little is known about LLPS in cardiovascular disease (CVD).
  • 716
  • 18 Oct 2022
Topic Review
Secretory Structures in Five Alismataceae Species
Alismataceae is a family consisting of floating to emergent aquatic or marsh herbs with a worldwide distribution. Limnocharitaceae was merged with Alismataceae to form one family comprising 17 genera and ca. 100 species.
  • 710
  • 22 Dec 2021
Topic Review
Methodology and Neuromarkers for Cetaceans’ Brains
Cetacean brain sampling may be an arduous task due to the difficulty of collecting and histologically preparing such rare and large specimens. Thus, one of the main challenges of working with cetaceans’ brains is to establish a valid methodology for an optimal manipulation and fixation of the brain tissue, which allows the samples to be viable for neuroanatomical and neuropathological studies.
  • 710
  • 09 Feb 2022
Topic Review
Histological Aspects on Endochondral Ossification
Bone is a mineralized tissue composed of calcium phosphates and organic materials such as collagen and proteoglycans. There are two phases of bone mineralization: primary and secondary. Primary mineralization is achieved by osteoblasts. Osteoblasts also produce a large amount of matrix vesicles, which mineralize in nodules (globular assemblies of hydroxyapatite crystals) and then extend into the collagen fibrils secreted by the osteoblasts. In contrast to primary mineralization, secondary mineralization is the process whereby the mineral density of bone increases after primary mineralization. It is postulated that secondary mineralization is regulated through physical crystal maturation, and by the cellular activities of osteocytes embedded in the bone matrix.
  • 705
  • 09 Feb 2023
Biography
Juan Valverde de Amusco
Juan Valverde de Amusco (Figure 1) was born in 1525 in the town of Hamusco (now Amusco) in the shire of Tierra de Campos (Crown of Castile, presently Palencia, Spain). There are few precise records of his life. The safest ones come from small comments disseminated throughout his books. The details regarding his childhood and youth remain unconfirmed. His probable Jewish origin has been suggested
  • 702
  • 10 Jan 2024
Topic Review
Woody Ornamental Plants in Mediterranean Climate
The native flora of different Mediterranean countries, often woody species, was widely recognized for its ornamental potential. The shrubs, in particular, are a typology of plants very widespread in the Mediterranean environment and constituent the ‘Macchia’, the typical vegetation of this ecosystem. These plant species could be used to improve the ornamental value of urban and peri-urban green areas. Since urban areas can suffer from low-quality soil and limited resources, the selection of plants must be carefully considered. The most commonly used plants should have adequate tolerance to abiotic stress.
  • 660
  • 01 Jun 2023
Topic Review
Neuroimaging-Based Assessments of OXPHOS-Related Complexes and Metabolites
In post-mortem studies, a significant dysregulation of electron transport chain (ETC) complexes was observed in patients with neurodegenerative diseases (NDs). These findings strongly implicate that mitochondrial dysfunction-linked alterations in oxidative phosphorylation (OXPHOS) can be considered a highly relevant molecular mechanism in different NDs. Histopathological examinations revealed decreased complex I level, preferentially in the substantia nigra (SN), in patients suffering from Parkinson’s disease (PD). These findings are consistent with the fact that inhibitors of complex I (such as the environmental toxins MPTP or rotenone) can cause parkinsonism in animal models and humans. Huntington’s disease (HD) has been associated with defects of complex II and, to a lesser extent, complex IV. The chronic administration of the complex II inhibitor 3-nitropropionic acid causes an HD-like phenotype in rodent and non-human primate models. In Alzheimer’s disease (AD), widespread cortical complex IV defects were identified in post-mortem brain tissue. The in vivo neuroimaging-based assessment of electron transport chain (ETC)-related metabolite levels could thus help elucidate the complex role of OXPHOS disturbances in NDs.
  • 647
  • 07 Jul 2022
Topic Review
Olfactory Bulb in Companion Animals
The Olfactory Bulb is a component of the Olfactory System, in which it plays an essential role as an interface between the peripheral components and the cerebral cortex responsible for olfactory interpretation and discrimination. It is in this element that the first selective integration of olfactory stimuli occurs through a complex cell interaction that forwards the received olfactory information to higher cortical centers. 
  • 638
  • 16 May 2023
Topic Review
Hypothalamic Suprachiasmatic Nuclei
24-h rhythms in physiology and behaviour are organized by a body-wide network of endogenous circadian clocks. In mammals, a central pacemaker in the hypothalamic suprachiasmatic nucleus (SCN) integrates external light information to adapt cellular clocks in all tissues and organs to the external light-dark cycle.
  • 599
  • 13 Dec 2021
Topic Review
The Intravitreal Space of the Eye
The intravitreal space comprises the majority of the eye’s volume and is located behind the lens of the eye. The vitreous chamber of the eye is mostly filled with a gel-like solution called the vitreous body. The vitreous body is 98.5–99.7% water containing salt soluble proteins and hyaluronic acid.
  • 593
  • 05 May 2022
Topic Review
The Na+/H+ Exchangers in Cardiac Physiology Regulation
The Na+/H+ exchangers (NHEs) are membrane transporters that exchange one intracellular pro-ton for one extracellular Na+. The first discovered NHE isoform, NHE1, is expressed almost ubiquitously in all tissues, especially in the myocardium. During myocardial ische-mia-reperfusion, NHE1 catalyzes increased uptake of intracellular Na+, which in turn leads to Ca2+ overload and subsequently myocardial injury. Numerous preclinical research has shown that NHE1 is involved in cardiac hypertrophy and heart failure, but the exact molecular mecha-nisms remain elusive.
  • 590
  • 27 Sep 2022
Topic Review
Seaweeds in Human Diet
Seaweeds have been harvested and used as food since ancient times in Asian countries, such as Korea, China, and especially Japan. There are over 600 recognized edible seaweed species and around 200 are consumed worldwide.
  • 575
  • 11 Jan 2023
  • Page
  • of
  • 6
Featured Entry Collections
>>

Featured Books

>>
Encyclopedia of Engineering
Encyclopedia of Social Sciences
Encyclopedia of COVID-19
Encyclopedia of Digital Society, Industry 5.0 and Smart City
Academic Video Service
Feedback
<<2020-2029
201920202021202220232024202520262027202820292030
<<2020-2029
201920202021202220232024202520262027202820292030