Evaluation Of Compatibility Research Articles

Construction and analysis of the EMC evaluation model for vehicular communication systems

With the development of wireless communication technologies, vehicle-mounted wireless communication systems are changing with each passing day, and their EMC has become the key to constraining vehicles to adapt to complex electromagnetic environments. Aiming at the limitations of existing EMC evaluation methods or models for wireless communication systems and the actual needs of EMC evaluation and analysis for vehicular communication systems, a five-level novel evaluation model including working environment, signal spectrum, receiver sensitivity, antenna isolation and communication performance is constructed considering the completeness and accuracy of EMC evaluation for vehicular communication systems. The performance of the constructed model is validated using the vehicular communication system of an armored vehicle as an example. The model can evaluate whether there is interference between the working environment and the signal spectrum of the vehicle-mounted radio station. error in the reduction of the receiver sensitivity between calculation and measurement is 5.8%. The calculated isolation of the vehicle-mounted antenna is in good agreement with the measurements. The modulation mode and coding mode of the vehicle-mounted digital communication system with better performance are simulated and analyzed. When the receiver sensitivity is reduced by 6 dB, the vehicle communication distance is reduced by 50%. The simulation and measurement results show that the proposed model is suitable for the evaluation of electromagnetic compatibility of vehicular communication systems for armored vehicles.

Evaluation of compatibility in bio-oil and zinc oxide modified asphalt to facilitate waste recycling

The promotion of bio-oil (Bo) waste in road asphalt modification has significant potential for application and environmental benefits. The thermal storage stability, rheological properties, and nano-microstructural characteristics of the composite modified asphalt system were investigated. The Cole-Cole diagram effectively evaluated the compatibility of modified asphalt, demonstrating high sensitivity and accuracy. Significant interaction energy was observed between zinc oxide (ZnO) and asphaltene, with asphaltene primarily acting as an electron donor during its interaction with ZnO. The three organic small molecules in Bo primarily interacted with the polar molecules in asphalt through ester groups, exhibiting varied interaction effects with asphaltene. Bo influenced the colloidal structure of asphalt mainly through diffusion and molecular intercalation. When Bo constituted 4% of the composite modified asphalt system, the organic small molecules from Bo fully diffused within the asphalt matrix, inhibiting the stacking of aromatic rings in the asphaltene structure and enhancing the aromatic activity of asphaltene. Bo improved the compatibility between ZnO and asphalt primarily through dilution and balancing effects from the perspective of asphaltene components. The research results can promote the promotion and application of bio-oil waste in asphalt pavement engineering, which is an important measure to practice sustainable development.

Evaluation of the Physical Compatibility of Intravenous Methocarbamol in Lactated Ringer’s, 0.45% Normal Saline, and Plasma-Lyte A

Background: The need to determine physical compatibility of intravenous admixtures is directly related to patient safety and patient outcomes. While the provision of multi-modal analgesic strategies has increased over the past decade, a paucity of data exists regarding physical compatibility of select medications. Objectives: To evaluate the physical compatibility of methocarbamol in Lactated Ringer’s (LR), 0.45% normal saline (0.45% NaCl), and Plasma-Lyte A (PLA) at concentrations of 4, 10, and 20 mg/mL. Methods: Admixtures were prepared and evaluated using previously validated methods under a laminar flow hood using aseptic technique. Samples were prepared in a triplicate manner, 3 mL aliquots were placed into polymethyl methacrylate cuvettes for evaluation at time points 0, 1, 5, 8, and 24 hours. Visual inspection of samples included assignment of a number: 0—no precipitation, 1—trace evidence of precipitation, 2—slight haze, 3—medium haze, and 4—heavy precipitation. Any evidence of precipitation was considered significant. A variable wavelength spectrophotometer set at 547 nanometers was used to measure absorbance. A change in absorbance of ±0.010 was considered significant. A change in pH of ±0.1 was considered significant. Results: No significant changes occurred relating to visual inspection or absorbance across all concentrations and time points for LR; however, there was a significant change in pH across all concentrations at hour 5. In 0.45% NaCl and PLA, no remarkable changes occurred across all concentrations and time points regarding visual observation, spectrophotometric absorbance, and pH analysis. Conclusions: Methocarbamol at concentrations of 4, 10, and 20 mg/mL is physically compatible for up to 1 hour in LR. Methocarbamol is physically compatible in 0.45% NaCl and PLA for up to 24 hours. Chemical stability tests are warranted to confirm these findings.

Components optimization of polyurethane-modified asphalt binder towards compatibility: Insight from molecular dynamics simulations

Polyurethane-modified asphalt demonstrated the enhanced durability and skid resistance, while remaining the drawback in the compatibility between the polyurethane modifier and asphalt binder in practical use. Herein, a molecular-dynamics-simulations based compatibility evaluation method is proposed for the polyurethane modifier and asphalt binder, thereby achieving the cost-effective and efficient components optimization. Twelve components asphalt molecular model was built in Molecular Dynamics to investigate the interaction of asphalt binder to the polypropylene glycol, toluene diisocyanate, and diphenylmethane diisocyanate, respectively. The molecular model of polyurethane modified asphalt binder was verified by the similar loss modulus temperature from the simulation and temperature scanning tests. The simulation outcomes indicate significant variations in the compatibility of different polyurethanes with asphalt, in which diphenylmethane diisocyanate-type polyurethane exhibits the superior compatibility. The compatibility of various polyurethane concentrations in asphalt shows considerable disparity, suggesting that the compatibility index can serve as a criterion for determining the optimal dosage of the modifier. Temperature also exerts an influence on the compatibility of polyurethane modified asphalt binder. Simulation results indicates that 130 °C potentially may be the optimal temperature for its preparation, which is corroborated by the microscopic characterization. This study provides a fundamental framework for the molecular dynamics simulation-based components optimization of polyurethane-modified asphalt, thereby inspiring the targeted design of asphalt materials.

Enhancing the performance of 3D-printed fiber-Reinforced mortar: synergistic effects of clays and bacterial cells as viscosity modifying agents

The absence of standardized 3D concrete printing mixtures drives ongoing material exploration. This study investigates mineral and bio-based viscosity modifying agents (VMAs) application in fiber-reinforced cementitious mortar. Nano-montmorillonite, sepiolite, and bacterial cells function as supplementary materials, partially substituting cement with fly ash for sustainability assessment and compatibility evaluation in our study. Mechanical tests encompass compressive, flexural strength, and interlayer bonding in 3D-printed samples. Based on the results, incorporating 0.150% Polyamide (PA) fiber positively affected interlayer bonding strength and deceleration of the flow loss rate. Additionally, adding clays decreased workability and compressive strength but improved interlayer bonding and flexural properties. On the other hand, substituting 20% of cement with FA improved the flowability of the mixture and showed great compatibility with other materials during printing. Applying a cement paste layer was evaluated as a practical method for bond enhancement at the interface. Bacteria incorporation improved flexural strength but weakened interlayer bonding. However, the combination of bacteria and clays resulted in a superior improvement in mechanical properties. This study demonstrates clays and bacteria’s potential in enhancing rheological and mechanical features in cementitious fiber-reinforced mortar. Notably, this study introduces bacteria cells and sepiolite as rheology modifiers in 3D concrete printing for the first time. Additionally, it presents a novel dog-bone-shaped structure test for assessing interlayer bond performance.

Evaluation of the Physical Compatibility of Biopesticides and Chemical Pesticides for Drone Application

Evaluation of the Physical Compatibility of Biopesticides and Chemical Pesticides for Drone Application

Study on Compatibility Evaluation of Multilayer Co-Production to Enhance Recovery of Water Flooding in Oil Reservoir

Study on Compatibility Evaluation of Multilayer Co-Production to Enhance Recovery of Water Flooding in Oil Reservoir

Material compatibility of epoxies exposed to repeated low temperature vaporized hydrogen peroxide sterilization

ABSTRACT Through technological advancements, medical devices have evolved in their designs and have become more complex in both their design and materials of construction. Medical grade biocompatible epoxies are widely used in reusable medical devices. Choosing an epoxy that maintains its performance characteristics when subjected to repeated sterilization throughout the reusable medical device’s lifespan is a known challenge for medical device manufacturers. This study evaluated the material compatibility of seven cured 2-part and 1-part epoxies used in medical devices following exposure to 100 cycles in a low temperature vaporized hydrogen peroxide sterilizer. Six of the seven epoxies tested were found to be compatible with vaporized hydrogen peroxide sterilization based on qualitative, hardness and weight measurements conducted post exposure to 100 VHP cycles. The epoxies deemed to be compatible displayed no visual signs of physical defects, minimal reduction in hardness (≤2%) and total weight gain (≤2.9%). One of the epoxy samples did not maintain its texture and exhibited 17% loss in hardness post exposure to 100 VHP sterilization cycles and was found to be incompatible with the low temperature vaporized hydrogen peroxide process. This study verifies the need for material compatibility evaluations of epoxies prior to designing and developing a medical device while keeping in mind the application, lifecycle and intended use of medical devices.

Enhancing electrical conductivity and mechanical properties of decellularized umbilical cord arteries using graphene coatings.

Traditional decellularized bioscaffolds possessing intact vascular networks and unique architecture have been extensively studied as conduits for repairing nerve damage. However, they are limited by the absence of electrical conductivity, which is crucial for proper functioning of nervous tissue. This study focuses on investigating decellularized umbilical cord arteries by applying coatings of graphene oxide (GO) and reduced graphene oxide (RGO) to their inner surfaces. This resulted in a homogeneous GO coating that fully covered the internal lumen of the arteries. The results of electrical measurements demonstrated that the conductivity of the scaffolds could be significantly enhanced by incorporating RGO and GO conductive sheets. At a low frequency of 0.1 Hz, the electrical resistance level of the coated scaffolds decreased by 99.8% with RGO and 98.21% with GO, compared with uncoated scaffolds. Additionally, the mechanical properties of the arteries improved by 24.69% with GO and 32.9% with RGO after the decellularization process. The GO and RGO coatings did not compromise the adhesion of endothelial cells and promoted cell growth. The cytotoxicity tests revealed that cell survival rate increased over time with RGO, while it decreased with GO, indicating the time-dependent effect on the cytotoxicity of GO and RGO. Blood compatibility evaluations showed that graphene nanomaterials did not induce hemolysis but exhibited some tendency toward blood coagulation.

Mechanical behavior of titanium nickelide material under stretch and evaluation of biomechanical compatibility

Mechanical behavior of titanium nickelide material under stretch and evaluation of biomechanical compatibility

Physical compatibility of ceftriaxone and cefepime in 0.45% sodium chloride, Ringer’s lactate solution, and Plasma-Lyte A

ObjectivesThe compatibility of intravenous fluids with medications is of paramount concern to pharmacists and is an imperative component of ensuring patient safety. Data regarding the physical compatibility of medications with...

Compatibility evaluation and mechanical properties of isotactic polypropylene/high density polyethylene (iPP/HDPE) blends

Compatibility evaluation and mechanical properties of isotactic polypropylene/high density polyethylene (iPP/HDPE) blends

Compatibility study of mirtazapine with several excipients used in pharmaceutical dosage forms employing thermal and non-thermal methods

AbstractMirtazapine is an atypical antidepressant used in the management of insomnia, post-traumatic stress disorder, anxiety or panic disorder, obsessive–compulsive disorder and migraines. It is used worldwide in pharmaceutical formulations alongside various excipients in its hemihydrate form. The objective of the study was the compatibility evaluation between MRTHH and ten pharmaceutical excipients. The presence of incompatibilities between the API and the selected excipients was evaluated using Fourier transform infrared spectroscopy performed on all pure samples and prepared mixtures at room temperature (23 ± 2 °C), as well as a complete thermal stress evaluation (TG—thermogravimetric/DTG—derivative thermogravimetric/DSC—differential scanning calorimetry). The results showed particularities for all analyzed mixtures, α-lactose monohydrate, starch, sorbitol, magnesium stearate, calcium lactate and magnesium citrate proving to be safe to use together with mirtazapine in binary mixtures at temperatures below 130 °C, while for polyvinylpyrrolidone K30 and aerosol precautions need to be considered at temperatures over 100 °C. The association of mirtazapine with D-mannitol or stearic acid proved to raise concerns even at room temperature, indicating possible interactions that may alter the chemical integrity of the active pharmaceutical ingredient and with it, its therapeutic effect. These findings should be taken into consideration during the selection of the technological procedures used in the manufacturing process of dosage forms that include mirtazapine alongside with any of these excipients so that unwanted chemical interactions could be avoided.

Effect of Anodic Oxidation Pulse Voltage on Antibacterial Properties and Biocompatibility of Ti-Ag Alloy

For the application of titanium and titanium alloys in orthopedic implant materials, the antibacterial properties and cell biocompatibility determine whether the implant surgery is successful. In this study, a functional anodic oxidation (AO) coating was successfully prepared to modify the surface of Ti-Ag alloy. The surface characteristics of the anodized Ti-Ag alloy were analyzed using techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and contact angle measurements. The corrosion characteristics of Ti-Ag samples were tested by an electrochemical workstation. In addition, the antibacterial properties and cell activity were studied by the plate count method and MC3T3-E1 cell staining. The results indicate that the AO process can generate a multi-functional TiO2/Ag2O coating with a large number of block and flower-like structures on the surface of a Ti-Ag alloy. When the AO voltage of the sample is 120 V, the maximum roughness is 0.73 μm and the minimum wetting degree is 23°, which improves the biocompatibility. The corrosion test results show that AO treatment can improve the corrosion resistance of a Ti-Ag alloy. The oxidation voltage is 20 V and the coating has the best corrosion resistance. The corrosion open circuit potential (Eocp) is 107.621 mV and the corrosion current density (icorr) is 2.241 × 10−8 A·cm−2. This coating can promote ion release and show more than 99% of a strong antibacterial ability against S. aureus. The results of the compatibility evaluation by cultured cells showed that the multifunctional coating formed by the anodic oxidation process did not cause cytotoxicity and promoted the adhesion of MC3T3-E1 cells.

Evaluation of compatibility between formation and Injection water into the Reservoir Rock

Scale deposition represents a critical challenge encountered in water injection systems. The objective of this study is to assess the compatibility between the candidate smart water and the formation water in an oil reservoir rock sample. To achieve this, water samples were collected and analyzed to evaluate the extent of deposit formation under varying temperature and pressure conditions. Additionally, the study also examined the combined influence of temperature and pressure on deposit formation. The results indicated that as the temperature increased, there was a decrease in the concentration of sulfate in the seawater. Taking into account the low concentration of barium (zero) in seawater and the unchanged strontium concentration, the decrease in sulfate concentration can be attributed to the deposition of calcium sulfate. Contrarily, in various ratios of smart water, the sulfate concentration has shown an increase with rising temperatures. This can be attributed to the transformation of sulfite present in the formation water into sulfate due to the influence of temperature. The presence of a low concentration of barium in the formation water resulted in insignificant changes in sulfate concentration due to the precipitation of barium sulfate. Additionally, despite the high concentration of strontium, strontium sulfate deposition did not occur, possibly due to the solubility product constant. The analysis of different smart water ratios under various pressures at ambient temperature revealed that pressure had a minimal effect on the solubility of sulfate and calcium salts. During the sediment analysis, no evidence of strontium sulfate sediment formation was observed. However, the analysis indicated a high possibility of iron sulfide and iron oxide deposits forming. Ultimately, under the experimental conditions, significant sediment formation was not observed.

A Novel Operation Technique for Forearm Deformities in Patients with Brachial Plexus Birth Injury: Retrospective Analysis of 14 Patients.

Background: We aimed to evaluate the effectiveness of our novel operation technique that included radial shaft shortening plus supination producing osteotomy and transfer of the biceps brachii tendon to the brachialis tendon in patients with chronic radial head dislocation secondary to brachial plexus birth injury (BPBI). Methods: Fourteen patients with chronic radial head dislocation resulting from BPBI were included in this study, with a minimum 1-year postoperative follow-up period. All patients underwent the same surgical procedure. The range of motion of affected elbow was measured with a standard goniometer. The Mayo Elbow Performance Score (MEPS) was used to measure for evaluation of functional result of these patients. The affected elbow radiograph also obtained in the last visit for evaluation of compatibility of the radiocapitellar joint. Results: Fourteen patients (10 males and 4 females) were included in the study. The average age at the time of surgery was 7.2 (5-8) years and average follow-up was 73.2 ± 19 (36-131) months. Although the forearm active-passive pronation decreased, active-passive supination significantly improved postoperatively (p < 0.001). Ten patients had excellent MEPS results (90 and above), two patients with good results (75 and 80), one patient with fair (65) and one patient with poor result (55). Radiocapitellar reduction was achieved in 78.5% (11/14) of the patients. Conclusions: The novel surgical techniques that included radial shaft shortening plus supination producing osteotomy and transfer of the biceps brachii tendon to the brachialis tendon improved the functional outcomes of patients with chronic radial head dislocation secondary to BPBI. Level of Evidence: Level IV (Therapeutic).

Evaluation of Bioprinted Autologous Cartilage Grafts in an Immunocompetent Rabbit Model

AbstractThe gold standard of auricular reconstruction involves manual graft assembly from autologous costal cartilage. The intervention may require multiple surgical procedures and lead to donor‐site morbidity, while the outcome is highly dependent on individual surgical skills. A tissue engineering approach provides the means to produce cartilage grafts of a defined shape from autologous chondrocytes. The use of autologous cells minimizes the risk of host immune response; however, factors such as biomaterial compatibility and in vitro maturation of the tissue‐engineered (TE) cartilage may influence the engraftment and shape‐stability of TE implants. Here, this work tests the biocompatibility of bioprinted autologous cartilage constructs in a rabbit model. The TE cartilage is produced by embedding autologous auricular chondrocytes into hyaluronan transglutaminase (HATG) based bioink, previously shown to support chondrogenesis in human auricular chondrocytes in vitro and in immunocompromised xenotransplantation models in vivo. A drastic softening and loss of cartilage markers, such as sulfated glycosaminoglycans (GAGs) and collagen type II are observed. Furthermore, fibrous encapsulation and partial degradation of the transplanted constructs are indicative of a strong host immune response to the autologous TE cartilage. The current study thus illustrates the crucial importance of immunocompetent autologous animal models for the evaluation of TE cartilage function and compatibility.

Research on a Two-stage Plane Adaptive Sampling Algorithm for Near-field Scanning Acceleration

As one of the most useful methods in electromagnetic interference (EMI) diagnosis, near-field (NF) scanning is widely used in electromagnetic compatibility (EMC) evaluation of complex devices under test (DUTs). In this paper, a two-stage plane adaptive sampling algorithm is proposed to reduce the acquisition time in the process of NF scanning and to make reconstruction of the radiation source more efficient. The sampling method is based on the region self-growth algorithm and the Voronoi subdivision principle, significantly reducing the number of NF samples in the stage of solving the radiation source model through uniform and non-uniform two-stage sampling. Two experiments were conducted to verify the correctness and effectiveness by comparing with the traditional uniform sampling method.

Compatibility evaluation between waterborne epoxy resin and SBR latex modified asphalt emulsion

Good compatibility between waterborne epoxy resin (WER) modifier and styrene-butadiene rubber (SBR) latex modified asphalt emulsion (SBRE) is an essential premise for good pavement performance of WER and SBR latex compositely modified asphalt emulsion (WSAE). This study aims to explore the compatibility between WER modifier and SBRE. To achieve the goal, several WER modifiers produced by two methods were first selected to modify SBRE, thus the WSAEs were prepared. Next, storage stability and workability of the WSAEs themselves, and high-temperature performance, rheological behavior and temperature sensitivity of their evaporated residues were compared and evaluated via performing a series of experiments, respectively, thus the WER modifier possessing an optimal modification effect was recommended. Results show that the storage stability of WSAEs is sensitive to the amount of WERs. The incorporation of 1% WERs by the mass of SBRE improves the storage stability of SBRE, while WERs that exceed 1% weaken its storage stability. When the WERs reach 3% and 4%, the 5 d storage stability of prepared WSAEs will be beyond the limitation of specification. Incorporating WERs into SBRE negatively affects the workability of SBRE, and the workability of WSAEs is adversely influenced by the WERs content and the storage time. To ensure the construction, the WSAEs with 3% and 4% WERs should not be stored for more than 36 h and 48 h, respectively. The WERs effectively improve the high-temperature performance of SBRE residue, especially the 3% WERs. Besides, the WERs notably enhance the rheological property and thermal stability of SBRE residue. In contrast, the WER modifier produced by chemically modified method has a smaller adverse impact on the storage stability and workability of WSAE, and a larger enhancement on the high-temperature performance, rheological property and thermal stability of SBRE residue, which is thus recommended to modify SBRE.

Advancing Carvedilol's Therapeutic Impact: A Study On Solid Dispersion Capsules for Improved Efficacy

This study aimed primarily to improve and evaluate the dissolution rate of Carvedilol by employing a solid dispersiontechnique with β-Cyclodextrin as the carrier. Three distinct methods were utilized to create Carvedilol-containing soliddispersions: The Kneading method, Physical mixture, and Solvent evaporation method. These methods incorporated β-Cyclodextrin at varying drug-carrier ratios (1:1, 1:2, and 1:3). The initial phase encompassed pre-formulation assessments, includingthe establishment of a calibration curve, determination of lambda maximum, melting point determination, investigation of solubilityin different solvents, and evaluation of Carvedilol-polymer compatibility through FTIR analysis. Subsequent post-formulationanalyses included tests for weight variation, Carvedilol content, lock length, moisture permeation, disintegration time, in-vitrodissolution, and stability. The results of the pre-formulation tests were consistent with established references. FTIR analysisrevealed no interactions between the Carvedilol and the carrier. Carvedilol content, weight variation, and disintegration time testsmet the permissible limits outlined in IP standards. Both lock length and moisture permeation tests conformed to the criteria.However, due to Carvedilol's limited solubility, dissolution was inadequate. Among the in-vitro dissolution profiles, the "KN3"formulation, prepared using the Kneading method with a 1:3 ratio of Carvedilol to Carrier, employing β-Cyclodextrin as thecarrier, exhibited superior discharge at 94.671%, outperforming other preparation methods.