This paper presents the results of experiments to investigate the influence of thermal characteristics of the environment on the thermal modes of transparent boxes. To conduct experiments on the non-stationary thermal model of solar greenhouses developed by us, two identical transparent boxes with dimensions of 0.80 x 0.65 x 0.80 m were constructed. The transparent boxes have rectangular shapes. One transparent box has glass walls and the other with polyethylene walls. The influence of the thermal characteristics of the environment and the thermal conditions inside the transparent boxes with film and glass transparent walls are investigated. The experimental results show that at a maximum ambient air temperature of 42 °C on 27.06.2024 at 13:48 hours, the air temperature increases to 10% and 23% in transparent boxes with polyethylene and with glass walls, respectively, and at 05:10 hours, the humidity decreases to 8% and 11%, respectively. Thus, the influence of the thermal characteristics of the environment on the thermal conditions of transparent boxes with glass walls, at the maximum ambient temperature, is greater by 1.2 times than in transparent boxes with polyethylene walls, and humidity decreases by half.
Background: Transcatheter arterial embolization can be used for patients with recurrent bleeding from the upper gastrointestinal tract after failed endoscopic treatment. Our aim to identify the clinical and technical factors that influenced the outcome of transcatheter embolization for therapy of upper gastrointestinal bleeding after failed surgery or after failed endoscopic treatment in high risk surgical patients.
Methods: We performed a prospective study to analysis of the 15 patients who underwent Transcatheter arterial embolization for nonvariceal upper gastrointestinal bleeding at Alshifa hospital from January 2015 to March 2019.
The following variables were recorded: demographic data, time from bleeding start to TAE, units of packed red cells before TAE and units of packed plasma before Transcatheter arterial embolization and we analysis 30 days rebleeding rates and mortality.
Results: Patients treated with Transcatheter arterial embolization (median age: 62 years, range: 14–79 years).The technical success rate of the embolization procedure was 100%. Time from bleeding start to TAE was 2.1 (1-4) days , units of packed red cells before Transcatheter arterial embolization was 12.8 (4-22) packed and units of packed plasma was 3.2 (2-5) packed. Following 30 days after embolization, 2 (13%) patients had repeated bleeding and 3 (20.0%) patients died.
Conclusion: In our experience, arterial embolization is a safe and effective treatment method for upper gastrointestinal bleeding and a possible alternative to surgery for high-risk patients.
For the first time, this research has developed an efficient and novel approach to high to excellent yields for synthesizing Quinazolinone derivatives. Also, the synthesis of Quinazolinone derivatives has been carried out in the presence of Co3O4@GO/La2O3 nanocomposite as a novel heterogeneous catalyst and a green under solvent-free conditions and in a short time and excellent yields for the first time. Various structural and morphological characteristics of the nanocatalyst were employed for the catalyst characterization, such as FT-IR, XRD, FE-SEM, EDX and VSM analyses. All characterization data were checked with each other so that the structure of the nanocatalyst was exactly characterized. The reactions were carried out in the presence of a low amount of nanocatalyst at 100 °C under solvent-free conditions for a short period of time. The proposed nanocomposite exhibits excellent catalytic activity. One of the most important advantages of this method is easy magnetic nanocatalyst separation, green condition, excellent recoverability and easy workup.
In today’s busy world, people don’t even have the time to fall ill. Diseases don’t just demand time but also physical efforts, mental peace, loss of work, distress of loved ones and financial loss. According to a report published in Harvard business review, each year in India, 39 million people are pushed into poverty by out-of-pocket payments for healthcare, with households on average devoting 5.8% of their expenditures to medical care [1].
Background: This work aims to show that the process of transfer of angular momentum ‑ spin supercurrent ‑ may provide the fulfillment of the fundamental law of ecology: “Everything is connected to everything else”.Results: The conducted investigations are based on the following properties of spin supercurrent: the equalization of the characteristics of interacting objects’ spins; dissipation-free; inertia-free (it is not accompanied by the emergence of kinetic mass); superluminal speed (there is no contradiction with Special Relativity, as Special Relativity postulates the speed limit only for an inertial process). The spin supercurrent emerges between virtual photons having a spin and being created by quantum objects of different types: living and non-living, electrically charged and neutral, magnetized and non-magnetized, having non-zero rest mass and having zero rest mass (such as photons). Conclusion: It is shown in this work that the properties of spin supercurrent may determine the following phenomena in ecology: the mimicry of animals and plants; the contactless (without living pathogenic microorganisms) spread of epidemics; the influence of the terrain relief on the population longevity; the use of water as information matrix; the stabilization of energy in the Earth’s core. Since the spin supercurrent possesses such properties as dissipative-free, superluminal speed, the non-electric and non-magnetic nature, it may perform interaction (quantum teleportation) of quantum objects between the Earth and Cosmic bodies. Thus, the extension of the biosphere’s border to Outer Space is possible.
Martha Lilia Tena-Suck, Laura Chavez Macias, Erick Gómez-Apo, Alma Ortiz Plata and Carmen Rubio*
Published on: 25th November, 2023
Background: CPTs are rare intraventricular papillary neoplasms derived from the choroid plexus epithelium. Anti-collagenase and extracellular matrix which have not been expressed in brain tumors. Objective: The purpose of this study was to investigate the expression levels of collagen type VI, anti-collagenase, laminin, MM9, claudins 1 and 5, N and E cadherins, and collagen VII, tejido, and collagen degradation enzyme complexes in choroid plexus tumors.Materials and methods: We studied the expression of adhesion molecules, extracellular matrix, and anticollagenase with an immunohistochemistry approach and electron microscopy analysis in 42 choroid plexus tumors. Results: 28(67%) were choroid plexus papillomas, 8 (19%) were atypical choroid plexus papillomas and 6 (14%) were choroid plexus carcinomas. The Ki67-li and MVD increased from CPC to ACPP, being the highest in malignant tumors as well as a strong immunoexpression of anti-collagenase and were inverse correlation with claudin 5, E, and N cadherin and collagen IV immunoexpressions which added further significant information to the prognosis and varied according to the histologic classification. By ultrastructure, the loss of basal membrane and cilia, disorganization, and proliferation of ECM were observed in CPC. Cerebral homeostasis largely results from the ability of both the Blood–Brain Barrier (BBB) at the brain microvascular endothelium and the Blood–Cerebrospinal Fluid Barrier (BCSFB) at the epithelium of the Choroid Plexuses (CPs), to control the composition of the CSF and cerebral extracellular fluid. Under expression of the tight junction proteins occludin, claudin-1 and claudin-5 are key molecular abnormalities responsible for the increased permeability of tumor endothelial tight junctions. Conclusion: The loss of basement membrane and ECM overexpression could be considered as a poor prognosis predictor in CPT. Anti-collagenase and MMP9 overexpression could be related to basal membrane and BBB plasticity in CPTs.
In many sectors, ranging from sports and military operations to professional settings (notably cognitive enhancement); human performance augmentation has been an enduring ambition. The idea behind this movement, known as human enhancement, has evolved over time from simple means of training to the improvement or augmentation of physical ability through recent developments in fields such as pharmaceuticals and implantable devices that can enhance natural abilities. They span from pharmaceutical agents to wearable technologies used for sophisticated self-experimentation, which offer promise but also present ethical, health, and societal risks Performance-Enhancing Drugs are used to enhance the performance of humans in one way or another as a basic idea. The categories of Performance Enhancing Drugs (PEDs) included are Stimulants: Stimulant drugs, including amphetamines and caffeine (in the form of coffee) have been used for thousands of endeavours and physical stamina for decades. There have been many sources of controversy in the sporting world due to use or misuse and side-effectual restrictions. The release of neurotransmitters such as dopamine and allowing muscles to grow big, and fast. Nevertheless, the consumption of anabolic steroids is strictly controlled because it has side effects and complications such as liver damage, hormonal imbalances, and greater aggression. Erythropoietin EPO is a hormone that produces red blood cells, and increased oxygen delivery to muscle. EPO Athletes and even more notably endurance athletes (such as cyclists) have a storied history of abusing this performance-enhancing agent to build stamina. However, the misuse of this drug can be very hazardous, as it causes complications such as blood clotting and heart issues.
Purpose: The purpose of this study was to evaluate biological dose in single-field optimization (SFO) and multi-field optimization (MFO) intensity-modulated proton therapy (IMPT) plans for brain tumor patients that used a fixed relative biological effectiveness (FRBE) and those that used a variable RBE (VRBE).
Materials and methods: SFO and MFO IMPT plans were planned by the Varian Eclipse treatment planning system for three brain tumor patients. Dose and linear energy transfer (LET) distributions for each plan were recomputed using an in-house fast Monte Carlo dose calculator system, and then biological dose distributions were calculated with a FRBE of 1.1 or with a previously published VRBE model. We then compared biological dose distributions obtained by the VRBE with those obtained by the FRBE.
Results: Doses obtained by the VRBE for the gross tumor volume and clinical target volume in all plans were 1%-2% larger than those obtained by the FRBE. The minimum dose obtained by the VRBE for the brainstem in the SFO IMPT of one patient was 140% larger than that obtained by the FRBE, but the difference was only 5.3 cGy (RBE). The difference in maximum dose for the optic chiasm in the MFO IMPT of another patient was less than 3.2%, but the dose difference was 149.2 cGy (RBE). We also found that no major differences were seen between the biological dose differences in the SFO IMPT plans and those in the MFO IMPT plans.
Conclusion: We could observe biological dose differences between the FRBE and the VRBE in the SFO and the MFO IMPT plans for brain tumor patients.
Coronary heart disease (CHD) seriously endangers human health, and there are obvious gender differences in incidence rate and prognosis, which are related to the evident differences in anatomical structure, physiological characteristics, and wall shear stress between males and females. In recent years, cardiac rehabilitation has been proven to be safe and effective in controlling the progression and improving the prognosis of CHD. Thereinto, exercise therapy is the central link of cardiac rehabilitation. Exercise can significantly affect vascular endothelial function by regulating wall shear stress. Based on previous research, this paper will briefly review the influence of exercise on wall shear stress in male and female patients with CHD, in order to provide a reference for formulating personalized cardiac rehabilitation programs and further improve the prognosis of CHD.
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Diaverum: PADC, Jeddah, Saudi Arabia
Nasrulla Abutaleb
The Journal Clinical Nephrology provides a good opportunity for readers to stay updated in the field of clinical nephrology. Additionally - it provides a good opportunity for authors to publish their...
Assaf Harofeh Medical Center, Israel
Leonid Feldman
Great, thank you! It was very efficient working w/ your group. Very thorough reviews (i.e., plagiarism, peer, etc.). Would certainly recommend that future authors consider working w/ your group.
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