Academic literature on the topic 'Malpighian vessels'

The problem of proper support for the health of bee colonies is now a topical issue. The study of bee haemolymph parameters under the influence of certain agents and factors has been carried out by a number of scientists in different countries of the world. Therefore the determination of changes in biochemical parameters of bee hemolymph when applying different concentrations (5 %, 2.5 %, 1.25 %) of “EM® PROBIOTIC FOR BEES” diluted with honey buckwheat and sugar syrup was the aim of the experiment. The study included placing experimental insects in entomological cages, creating optimal conditions for their life, feeding them with “EM® PROBIOTIC FOR BEES” diluted with honey buckwheat and sugar syrup in different concentrations and studying biochemical parameters of their haemolymph on the “limiting” day in relation to the time of their death. Some biochemical parameters of the bees from 8 experimental groups (laboratory conditions) were compared with the hemolymph Apis mellifera of the control (natural conditions) group from the same apiary. Biochemical parameters of haemolymph: total protein (PRO); albumin (ALB); glucose (GLU); α-amylase (AMY); alkaline phosphatase (ALP); aspartate aminotransferase (AST) (SGOT); gamma-glutamyl transpeptidase (GGT) and creatinine (Cre) were determined by a Chem 7 semiautomatic biochemical analyser by wavelength selection and calibration for each parameter. The changes in these parameters in relation to the bee organism under laboratory conditions are interpreted. The negative effects of honey buckwheat syrup as a solvent for “EM® PROBIOTIC FOR BEES” have been revealed, leading to hyperprotenemia, where an excessive amount of protein can act as a trigger for the development of ketosis. In turn, the decomposition product of this protein, ammonia, that causes high enzyme activity in the form of aspartate aminotransferase (SGOT), and gamma-glutamyl transpeptidase (GGT) in the blood of experimental insects which were fed probiotic diluted with buckwheat honey syrup. At the same time, concentrations of the preparation diluted with sugar syrup solution were determined to cause an increase in the content of globulins in the haemolymph of experimental insects, which have important immunological significance. There was a decrease in creatinine in the haemolymph of experimental insects which had been fed “EM® PROBIOTIC FOR BEES”, diluted with sugar syrup solution (5 % – 780 µmol/l; 2.5 % – 700.8 µmol/l; 1.25 % – 62.4 µmol/l). Note the fact of satisfactory operation of the malpighian vessels of the excretory system of experimental insects. Thus, “EM® PROBIOTIC FOR BEES” is a promising agent with a differential effect on the biochemical parameters of bee hemolymph in the studied concentrations.

Cardiology (from the Greek. καρδία-heart and λογος-study) is an extensive branch of medicine that deals with the study of the human cardiovascular system. Cardiology is believed to have originated in Ancient Egypt around 3000 BC. Hippocrates first describes the structure of the heart as a muscular organ. Harvey was the first to experimentally prove the existence of blood circulation. Andreas Vesalius created the basic prerequisites for the subsequent discovery of pulmonary circulation. Malpighi published the results of observations on the structure of the lung, for the first time gave a description of capillary vessels. For the first time, the Italian researcher Gaspar Azeli reported on lymphatic vessels and their connection with blood vessels. Purkinje published research on specific muscle fibers that conduct arousal through the heart (Purkinje fibers), which initiated the study of its conducting system. Thanks to all these fundamental discoveries, by the beginning of the XIX century, cardiology had become an independent branch of medicine, which has its own methods of diagnosis and treatment of diseases.

Abstract Background and Aims The modern development of the black box approach in clinical nephrology is inconceivable without a logical theory of renal function and a comprehension of anatomical architecture of the kidney, in health and disease: this is the undisputed contribution offered by Malpighi, Oliver and Trueta starting from the seventeenth century. The machine learning model for the prediction of acute kidney injury, progression of renal failure and tubulointerstitial nephritis is a good example of how different knowledge about kidney are an indispensable tool for the interpretation of model itself. Method Historical data were collected from literature, textbooks, encyclopedias, scientific periodicals and laboratory experimental data concerning these three authors. Results The Italian Marcello Malpighi (1628-1694), born in Crevalcore near Bologna, was Professor of anatomy at Bologna, Pisa and Messina. The historic description of the pulmonary capillaries was made in his second epistle to Borelli published in 1661 and intitled De pulmonibus, by means of the frog as “the microscope of nature” (Fig. 1). It is the first description of capillaries in any circulation. William Harvey in De motu cordis in 1628 (year of publication the same of date of birth of Italian anatomist!) could not see the capillary vessels. This thriumphant discovery will serve for the next reconnaissance of characteristic renal rete mirabile.in the corpuscle of Malpighi, lying within the capsule of Bowman. Jean Redman Oliver (1889-1976), a pathologist born and raised in Northern California, was able to bridge the gap between the nephron and collecting system through meticulous dissections, hand drawn illustrations and experiments which underpin our current understanding of renal anatomy and physiology. In the skillful lecture “When is the kidney not a kidney?” (1949) Oliver summarizes his far-sighted vision on renal physiology and disease in the following sentence: the Kidney in health, if you will, but the Nephrons in disease. Because, the “nephron” like the “kidney” is an abstraction that must be qualified in terms of its various parts, its cellular components and the molecular mechanisms involved in each discrete activity (Fig. 2). The Catalan surgeon Josep Trueta I Raspall (1897-1977) was born in the Poblenou neighborhood of Barcelona. His impact of pioneering and visionary contribution to the changes in renal circulation for the pathogenesis of acute kidney injury was pivotal for history of renal physiology. “The kidney has two potential circulatory circulations. Blood may pass either almost exclusively through one or other of two pathways, or to a varying degree through both”. (Studies of the Renal Circulation, published in 1947). Now this diversion of blood from cortex to the less resistant medullary circulation is known with the eponym Trueta shunt. Conclusion The black box approach to the kidney diseases should be considered by practitioners as a further tool to help to inform model update in many clinical setting. The number of machine learning clinical prediction models being published is rising, as new fields of application are being explored in medicine (Fig. 3). A challenge in the clinical nephrology is to explore the “kidney machine” during each therapeutic diagnostic procedure. Always, the intriguing relationship between the set of nephrological syndromes and kidney diseases cannot disregard the precious notions the specific organization of kidney microcirculation, fruit of many scientific contributions of the work by Malpighi, Oliver and Trueta (Fig. 3).

Malpighian tubules of A. dorsalis mosquito larvae, studied in vitro, actively transported magnesium at high rates against concentration gradients as large as 16-fold and transepithelial potential gradients of approximately -l5mV. Fluid secretion rates, determined over 90 minute periods, in the presence and absence of cAMP, indicated that A. dorsalis tubules were viable and had secretion rates of the same magnitude as those reported for A. taeniorhynchus tubules. Having characterized the in vitro preparation of Malpighian tubules, the main hypothesis that Mg²⁺ transport is driven predominately by counter transport with Na⁺ was tested. This hypothesis was not supported by kinetic, Na-substitution, or inhibitor studies. Kinetic and Bumetanide studies suggest backflux of K drives J mg; however, this was not consistently found in other studies.
Science, Faculty of
Zoology, Department of
Graduate

The primary preoccupation of eighteenth century botany was taxonomy, a field dominated by Carolus Linnaeus’s sexual system based on counting stamens and pistils. Linnaeus also developed a proto-evolutionary theory based on hybridization. Few eighteenth century botanists were experimentalists. In Italy, Guilio Pontedera compared nectaries to breasts that nourish seeds, dismissing male flowers as “useless appendages.” In France, Jean Marchant elaborated Malpighi’s uterine analogy of the flower, and Joseph Pitton de Tournefort espoused the classical interpretation of pollen as a “vessel of excretion.” However, Sébastien Vaillant and Claude-Joseph Geoffroy focused on plant sex. In 1717, Vaillant’s sensational lecture (denounced by Geoffroy as suitable only for “Priapic festivals”) celebrated steamy nuptial encounters between stamens and pistils. In England, Philip Miller discovered bee pollination, and Thomas Fairchild produced the first hybrid, although tampering with nature by creating “monsters” was still considered distasteful, even blasphemous. Richard Bradley tested the sexual theory on hermaphroditic flowers.