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Blood Pressure01:24

Blood Pressure

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The movement of blood in a human body, commonly referred to as blood flow, is determined by the volume of blood that traverses a certain section of the bodily system per unit time. It is the rhythmic contraction of the heart's ventricles that primarily instigates this movement. As the ventricles contract, blood is forced into the prominent arteries, which then flow from areas of greater pressure to lower pressure areas. This movement continues into smaller arteries and arterioles and...
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The P-type pumps are a large family of integral membrane transporter ATPases. They are divided into five major types based on substrate specificity, from I to V.
A typical P-type pump has three cytosolic domains: nucleotide-binding (N), phosphorylation (P), and activator (A) domains. These domains are connected to the membrane-spanning helices by short amino acid segments. ATP hydrolysis and covalent phosphoenzyme intermediate formation are crucial parts of the catalytic cycle. At the highly...
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Equipments Used To Measure Blood Pressure01:30

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Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
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Measurement of Blood Pressure01:17

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Assessing blood pressure is a standard procedure executed in virtually all medical environments. The method utilized today was established over a hundred years ago by an innovative Russian doctor, Dr. Nikolai Korotkoff. The soft ticking noise, known as Korotkoff sounds, heard while taking blood pressure readings results from turbulent blood flow within the vessels. The apparatus required for this procedure includes a sphygmomanometer, a blood pressure cuff attached to a gauge, and a...
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Postsynaptic Potential (PSP)01:32

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Postsynaptic potential (PSP) refers to a change in the electrical potential of a neuron when neurotransmitters released by presynaptic neurons bind to postsynaptic receptors. This potential can either be excitatory, leading to depolarization and ultimately action potential generation, or inhibitory, leading to hyperpolarization and suppression of the postsynaptic neuron.
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Sites for measruring blood pressure01:21

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Blood pressure measurement is a fundamental clinical procedure, providing crucial data for assessing cardiovascular health. Among the various sites for this measurement, the brachial and popliteal arteries are predominantly utilized due to their accessibility and the reliability of their readings. This lesson delves into the anatomical significance, methodology, and considerations of measuring blood pressure at these locations.
The Brachial Artery: Primary Site for Blood Pressure Measurement
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Implantation of Combined Telemetric ECG and Blood Pressure Transmitters to Determine Spontaneous Baroreflex Sensitivity in Conscious Mice
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From BPS

Yi Huang1, Dongdong Chu2,3, Yihan Yun2,3

  • 1School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China. yongzhang@hit.edu.cn.

Dalton Transactions (Cambridge, England : 2003)
|June 5, 2023
PubMed
Summary
This summary is machine-generated.

Introducing alkali metal ions like sodium (Na+) and potassium (K+) into boron-thiophosphate BPS4 (BPS) created new quaternary materials (ABPS). These new materials exhibit wider bandgaps, enhancing optical properties.

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Area of Science:

  • Solid-state inorganic chemistry
  • Materials science
  • Crystal engineering

Background:

  • Cation-controlled crystal structures are key for tuning optical material performance.
  • Boron-thiophosphate BPS4 (BPS) serves as a foundational template for structural modification.

Purpose of the Study:

  • To investigate the synthesis and structural evolution of boron-thiophosphates upon alkali metal ion incorporation.
  • To explore the impact of cation introduction on the bandgap and optical properties of these materials.

Main Methods:

  • Synthesis of novel quaternary boron-thiophosphates, AB3P2S10 (A = Na, K) (ABPS), using BPS as a template.
  • Structural characterization and analysis of the resulting crystal structures.
  • Theoretical calculations to understand the electronic structure and bandgap modifications.

Main Results:

  • Successful synthesis of the first quaternary boron-thiophosphates, AB3P2S10 (ABPS).
  • Transformation of the anion skeleton from a 1D chain in BPS to 0D clusters in ABPS.
  • Significant increase in bandgap from 3.30 eV (BPS) to 3.42 eV (Na-ABPS) and 3.49 eV (K-ABPS).

Conclusions:

  • Alkali metal cations (Na+, K+) effectively break down the infinite chains in BPS into discrete [B3P2S10] clusters.
  • Cation insertion localizes electrons within [BS4] and [PS4] units, leading to bandgap widening and improved optical properties.
  • This study expands the structural chemistry of boron-thiophosphates and demonstrates ionic bond influence on covalent frameworks and optical behavior.