Effect Of Various Temperatures Research Articles

A Study on the Surface Oxidation Pretreatment and Nickel Plating Mechanism of Carbon Fiber.

This study explores the effects of various temperatures on the surface modification of carbon fibers, as well as the effect of differing voltages and currents on the morphology, deposition rate, and thickness of the Ni plating layers. Post-treatment characterization of the samples was conducted utilizing scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) methods, thus facilitating a discussion on the mechanism of Ni plating. The findings demonstrate that at a temperature of 500 °C, the carbon fiber surface exhibits the highest concentration of functional groups, including hydroxyl (-OH), carboxyl (-COOH), and carbonyl (-C=O), resulting in the most efficacious modification. Specifically, exceeding 500 °C leads to significant carbon fiber mass loss, compromising the reinforcement effect. Under a stable voltage of 7.5 V, the Ni-plated layer on the carbon fibers appear smooth, fine, uniform, and complete. Conversely, at a voltage of 15 V, the instantaneous high voltage induces the continuous growth of Ni2+ ions along a singular deposition point, forming a spherical Ni-plated layer. In addition, a current of 0.6 A yields a comparatively uniform and dense carbon fiber coating. Nickel-plated layers on a carbon fiber surface with different morphologies have certain innovative significance for the structural design of composite reinforcements.

Effect of varying temperature increases on the microbial community of Pleistocene and Holocene permafrost

The total area covered by permafrost has been continually decreasing over the past decades. This study investigates the effect of various temperature increases on the microbiome of permafrost sampled at the Cold Regions Research and Engineering Laboratory (CRREL) Permafrost Tunnel site in Fox, Alaska, USA, corresponding to the Holocene (around 8000 years before present (ybp)) and Pleistocene (around 36,000 ybp), respectively. The soil was subjected to two thawing time courses, with temperature increasing from −4 °C to either +4 °C or +25 °C, and total nucleic acid was extracted at each time point. Consistent with previous 16S rRNA amplicon sequencing studies on the Permafrost Tunnel, the Pleistocene was dominated by Clostridia, while the Holocene was mainly composed of Clostridia, Bacteroidia and Alphaproteobacteria at −4 °C. Thawing at +25 °C resulted in divergent microbial profiles for permafrost of both ages, with the Pleistocene becoming more similar to the active layer, while the Holocene was relatively less impacted. Prediction of metabolic function revealed that bacteria from the Holocene permafrost activated degradation pathways upon thawing at +25 °C, while bacteria from the Pleistocene were more involved in amino-acid biosynthesis pathways, suggesting different mechanisms of adaptation.

Comparing mechanism response and thermal conductivity of Ti3C2 and Ti3C2O2

This study uses molecular dynamics to investigate the effect of various temperatures and sample sizes on the mechanical mechanism and thermal conductivity of Ti3C2 and Ti3C2O2 Mxenes. The size of the Mxenes decides the severity of the crack and the von Mises stress clustering. The elastic phase trend of Ti3C2 materials in different sizes follows Hooke’s law, while the complex elastic trend is for the Ti3C2O2 models. The material toughness of Ti3C2 is relatively high, and the material’s response to the force is relatively stable and linear during the process of being subjected to pressure. The Ti3C2O2 Mxene presents a low toughness, low stability, and easier breakage during stress due to the complex structure and the formation of anatase and rutile TiO2 phases. The thermal conductivity decreases when the temperature increases or the material sizes decrease for both materials. Notably, Ti3C2 shows superior thermal conductivity in comparison to the Ti3C2O2 Mxene.

A pilot scale study on the effects of various temperature and time conditions on milk quality using direct and indirect heating systems

Effects of various heating temperatures (124, 129, 134, 140 or 143 °C) and holding times (1 and 4 s) on milk quality using direct and indirect heating systems at pilot scale were investigated. Vitamin degradation was observed for both direct and indirect heating and the degradation increased with increasing temperature and holding time, however, no difference could be seen between heating systems. Slight increase in pH and decrease in ionic calcium for direct heating occurred. An increase in fat globule size and aggregate formation were noted for direct heating with more pronounced effects with increasing temperature. Physical stability of milk was unaffected on day of production; however, after 28 days of storage instability was more apparent for indirect heating. No effect of heating system was observed on colour. This suggests that heating may influence milk quality, however, no clear differences between direct and indirect heating were observed for the quality parameters investigated.

Temperature influence variation on extracted oil yield from exported white sesame seed Characterization

This study was conducted to find out the effects of various temperatures on the physiochemical and extraction characteristics for oil extracted from white sesame seeds, specifically looking at the yield of extraction, physical analysis, and chemical aspects of the sesame oil that was produced. Using petroleum ether as a solvent, the oil output from sesame seeds was evaluated throughout a temperature range of 100-250°C. Extracted sesame oil had a little aroma, was clear, and had a golden hue; at room temperature, its oil content ranged from 57.49% to 40.79 %. Sesame oil's physical properties were assessed by measuring its density, specific gravity, moisture content, and refractive index. At 250°C, the refractive index reached its maximum, which was in the range of 1.468 to 1.473. At 250°C, the specific gravity was the greatest, however it ranged from 0.9 to 0.98. At 250°C, the moisture content was the lowest, yet it varied from 0.0014% to 0.35%. At 250°C, the density dropped from 0.950 to 0.690 g/cm3, a decline that was temperature dependent. Sesame oil's chemical evaluation included measures for acidity, free fatty acid concentration, iodine, peroxide, and saponification. A possible indicator of oil deterioration or contaminants is the fact that acid value and free fatty acid content rise with increasing sample levels. Differences in unsaturation levels were suggested by the varying iodine values. The peroxide value rose as the sample concentration rose, suggesting that the oxidation potential rose as well. Variations in triglyceride content or source were reflected in the saponification levels, which likewise showed some fluctuation.

Overcoming Dormancy in Prunus Species under Conditions of Insufficient Winter Chilling in Israel.

The phenomenon of dormancy and the evolutionary causes for its development are presented together with the effects of the climatic factors: temperature and light. Shade and darkness have been found to enhance bud breaking in peach. The effects of various temperatures on chilling accumulation, chilling negation and chilling enhancement are described. The way these are computed in the face of global warming is explained, using the dynamic model. When natural chilling is less than that required, there are ways of compensation, up to a certain level. Various horticultural, physical and chemical means to achieve this are described, including bending branches, reducing vegetative vigor, shading the orchard, sprinkling to reduce daytime temperature and the application of various chemicals to break dormancy. When winter chilling is markedly reduced and temperatures increase considerably, the use of dormancy avoidance is suggested in frost-free places. This technique can induce a new growing cycle by avoiding dormancy altogether. However, the best approach is to breed high-quality cultivars requiring much less chilling. Another aspect discussed in this work, independent of the chilling requirement, is the negative effect of heat spells in winter and spring on the abnormal development of flower buds, leading to a low level of the stone fruit set and a reduced yield.

Investigation of Solar Powered Single Effect Absorption System

Cooling processes like refrigeration and air conditioning are known for their high energy consumption. Since most Indian states experience abundant sunshine year-round, solar refrigeration is a suitable technology for the country. Solar-powered absorption refrigeration systems offer a viable alternative to traditional refrigeration, providing not only cooling and ice-making capabilities but also energy savings and environmental benefits. However, further research is necessary to enable widespread industrial adoption and the replacement of conventional refrigeration systems with solar powered absorption system. Using solar energy for an air-conditioning system is typically more cost-effective, when it can fulfil both heating and cooling needs. This research focuses on the thermodynamic modelling of a system, specifically the effect of various temperature on COP. Thermodynamic modelling was done with the help of first law of thermodynamics. Using engineering equation solver software, study simulated the cycle and equations were developed for energy and mass flow for each component. Further, before proceeding to analysis some assumptions were also made. We then analysed how the Coefficient of Performance (COP) changed when varying the temperatures across each component. Our findings show that COP increases with increase in condenser, evaporator, and absorber temperatures, but it is declined with decrease in generator temperature.

In silico computational prediction of Saussurea pulchella compounds with inhibitory effects on plasmepsin X in Plasmodiumfalciparum

Malaria poses serious problems in countries located in tropical and subtropical regions worldwide. Plasmodium falciparum is responsible for approximately 90 % of malaria-related deaths worldwide. Therefore, alternative treatments are required to effectively reduce the number of malaria cases. Therefore, the objective of this study was to explore alternative malaria treatments by identifying compounds targeting P. falciparum plasmepsin X and characterizing the interactions under various temperatures. Molecular docking was used to evaluate interactions between polyphenolic compounds from Saussurea pulchella and plasmepsin X, followed by stability analyses using molecular dynamics (MD) simulations. Selected compounds were analyzed for biological activity, reactivity, and toxicity. RMSD (root mean square deviation), RMSF (root mean square fluctuation), Rg (radius of gyration), SASA (solvent-accessible surface area), and H-bonds were evaluated. Furthermore, MM-PBSA (molecular mechanics Poisson–Boltzmann surface area), PCA (principal component analysis), and DCCM (dynamic cross-correlation matrix) were use to evaluate effects of various temperatures. Pinoresinol 4-glucoside had a binding energy of 10.006 kcal/mol and was predicted to be nontoxic. MD simulations of pinoresinol 4-glucoside were conducted at different temperatures (298 K, 300 K, 305 K, 310 K, and 320 K) over a trajectory of 150 ns, revealing a strong binding energy using the MM-PBSA method. Our findings suggest that pinoresinol 4-glucoside is an alternative treatment for malaria and should be further evaluated at the laboratory and clinical levels.

Design and performance characterization of highly wettable core-shell structured SiC@C composites

SiC@C composites are extensively used in high-temperature metallurgy owing to their distinctive physicochemical properties. In this study, SiC@C composites with a core-shell structure were synthesized using silicon powder and Fe2O3 as the silicon source and catalyst, respectively. The effect of various temperatures on the synthesis of the SiC@C composites was investigated. The results indicated that a SiC whiskers layer covers the graphite surface at 1600 °C. At this temperature, the production of silicon carbide reaches 9.2 %. Transmission electron microscope (TEM) revealed that the preferred growth orientation of SiC was the (111) crystal plane. Based on density functional theory, the adsorption properties of different crystal planes of SiC crystals and their interactions with Fe atoms on the crystal surface were investigated. The results showed that the adsorption properties of different SiC crystal planes varied, with the (111) crystal plane exhibiting the strongest adsorption ability. In the presence of Fe atoms, the adsorption properties of the (111) crystal plane reaches to a value of −2686.5253 Ha, indicating that Fe atoms can promote the adsorption of other atoms or molecules on the surface of SiC crystals. Additionally, the wettability of the SiC@C composites was improved, as evidenced by the decrease in the contact angle from 109° to 46°.

The Effect of Various Temperatures on the Inflammatory Profile of Fat Graft Storage: An Experimental Study.

Fat tissue has been widely used as a filler material during plastic surgery, but unpredictable fat retention remains a significant concern. Fat tissue is vulnerable to ischemia and hypoxia, but it always has waiting time before injection in the operation theater. Apart from transferring fat tissue as quickly as possible after harvesting, washing the aspirate with cool normal saline is often used. However, the mechanisms of cool temperature acting on adipose tissue have yet to be fully elucidated. Herein, this study aims to explore the effect of preservation at different temperatures on the inflammatory profile of adipose tissue. Inguinal adipose tissue of rats was collected and cultured in vitro under 4°C, 10°C, and room temperature for 2 hours. The proportion of damaged adipocytes and an array of cytokines were determined. We observed that the damage rate of the adipocyte membrane was slightly higher at room temperature, but there was no significant difference, while we noticed increased IL-6 and MCP-1 levels in adipose tissue at room temperature ( P ＜0.01). The 4°C and 10°C cool temperatures may offer protection against proinflammatory states during the adipose tissue preserved in vitro.

Hydration evolution of calcium sulfoaluminate cement modified with styrene-butadiene copolymer: Effect of various temperatures and relative humidity

The behavior of styrene-butadiene copolymer (SB) modified calcium sulfoaluminate (CSA) cement hydrated under different temperatures and relative humidity conditions was studied. X-ray diffraction (XRD) and thermogravimetry (TG) were used to investigate cement hydration development in different temperatures (5 °C, 20 °C, and 40 °C) and relative humidity (low, middle, and high) conditions at different ages (28 days, 1 year and 2 years), as well as the micro-morphology of hydration products was analyzed by scanning electron microscope (SEM). Meanwhile, a control group test was set up in a natural environment. The results showed that the hydration products were susceptible to environmental temperature and humidity. With the temperature rising, the hydration degree of CSA cement was promoted, and the content of AH3, monosulfate, and hemicarbonate increased, but the ettringite content decreased. With environmental humidity rising, the hydration degree and content of the main hydration products (ettringite and AH3) increased, while the content of hemicarbonate increased among 30% RH ∼ 60% RH and then decreased among 60% RH ∼ 90% RH. The presence of SB restrained the formation of CAH10, monosulfate, and strätlingite, but increased the content of ettringite and AH3. A hydration model under different environmental conditions was proposed.

Escherichia coli-induced inflammatory responses are temperature-dependent in human whole blood ex vivo

Systemic inflammatory conditions are often associated with hypothermia or hyperthermia. Therapeutic hypothermia is used in post-cardiac arrest and some other acute diseases. There is a need for more knowledge concerning the effect of various temperatures on the acute inflammatory response. The complement system plays a crucial role in initiating the inflammatory response. We hypothesized that temperatures above and below the physiologic 37 °C affect complement activation and cytokine production ex vivo. Lepirudin-anticoagulated human whole blood from 10 healthy donors was incubated in the presence or absence of Escherichia coli at different temperatures (4 °C, 12 °C, 20 °C, 33 °C, 37 °C, 39 °C, and 41 °C). Complement activation was assessed by the terminal C5b-9 complement complex (TCC) and the alternative convertase C3bBbP using ELISA. Cytokines were measured using a 27-plex assay. Granulocyte and monocyte activation was evaluated by CD11b surface expression using flow cytometry. A consistent increase in complement activation was observed with rising temperature, reaching a maximum at 41 °C, both in the absence (C3bBbP p < 0.05) and presence (C3bBbP p < 0.05 and TCC p < 0.05) of E. coli. Temperature alone did not affect cytokine production, whereas incubation with E. coli significantly increased cytokine levels of IL-1β, IL-2, IL-6, IL-8, IFN-γ, and TNF at temperatures > 20 °C. Maximum increase occurred at 39 °C. However, a consistent decrease was observed at 41 °C, significant for IL-1β (p = 0.003). Granulocyte CD11b displayed the same temperature-dependent pattern as cytokines, with a corresponding increase in endothelial cell apoptosis and necrosis. Thus, blood temperature differentially determines the degree of complement activation and cytokine release.

Spatial migration and distribution of suspended particles in saturated sand layer under the impact of temperature

AbstractThe migration, deposition and detachment of suspended particles in saturated sands are used in many fields. Temperature is an important influencing factor in the transport and deposition process of particles in porous media, and it plays an important role in ground‐water heat pump (GWHP) projects. This article discusses the independent development of a three‐dimensional percolation sandbox test device and the design of a particle migration test based on the Reynolds number in the context of the backfilling process of GWHP systems as the experimental background. The effects of various temperatures (10, 25, and 40°C) on the movement of suspended particles in porous media were studied. The experimental results showed that as the temperature rose, more particles were deposited in the sand layer, the uneven flow of particles in the sand layer accelerated, and the particles spread out in the direction opposite to the non‐percolation direction with a wider distribution range in the sandbox. Increased temperature also promoted the percolation of smaller particles, causing the diffusion zone to terminate sooner and the deposition zone to last longer, resulting in the capture of more particles on the surface and in the pore channels of the sand layer.

Study of effect of various temperatures on the abundance of ammonia oxidizing archaea and bacteria

Temperature plays significant role in the oxidation of ammonia in filtration units of recirculating aquaculture system. The impact of temperature on the abundance of ammonia oxidizing archaea and bacteria, and the expression of ammonia oxidizing gene (amoA) at specific temperature was evaluated. The broken earthen pot pieces used as filter bed materials of recirculating system, showing the presence of microorganisms were introduced in glass containers (5 pieces/5l) filled with synthetic wastewater and exposed to four different temperatures of 10, 20, 30 and 40°C for 40 days. The ammonia oxidation rate was minimum at 10°C. In 20, 30 and 40°C treatments, 99% ammonia was reduced on day-18, 8 and 18, respectively compared to the initial day. Fresh ammonium chloride (2 mM) was added twice to maintain the ammonia concentration in all treatments, except 10°C one. Nitrite-N level was &lt; 1 mg/l at 10°C. The level was highest on day-22 at 20° and 40°C and on day-12 at 30°C. The nitrification was 10 days delayed at 20°C and 40°C compared to 30°C treatment. Concentration of nitrate-N was lowest at 10°C. Highest concentration of nitrate-N was observed on day-40 at 20°C and 40°C and day-26 at 30°C. Highest copy number of bacterial amoA was recorded at 30°C (2.59×107) followed by 20°C (4.08×106), 40°C (1.45×106) and 10°C (5.664×103). Archaeal amoA was highest at 30°C (7.47×103) followed by 40°C (2.98×102) and 20°C (46.8) treatments. Hence it may be concluded that 30°C temperature was optimum for the efficient and faster oxidation of ammonia in the present recirculating system.

Effect of Various Drying Temperatures on Characteristics of Mustard Green Flour and Leaves During Drying

Vegetables can be extended their shelf life by processing them into vegetable flour. Flour processing technology is inseparable from the drying process which means removing water from a material until it reaches a certain moisture content. This study aims to determine the effect of various temperatures at various stages of drying on the characteristics of the material to become mustard green flour. Drying it using a cabinet dryer at temperatures of 45 oC, 55 oC, and 65 oC. Observations were made at 0 h of drying (analysis of raw materials), 2 h, 4 h, and after turning into mustard green flour. The results showed that the drying temperature had an effect on the changes in the characteristics of the material during the drying process until it turned into mustard green flour. During the drying process, there was a decrease in moisture content, ash content, total chlorophyll, and physical color of the mustard green flour. Drying temperature has an effect on decreasing moisture content, ash content, total chlorophyll and physical color of mustard green flour, while drying time affects total chlorophyll and physical color of mustard green flour.

Assessment of Destructive and Nondestructive Analysis for GGBS Based Geopolymer Concrete and Its Statistical Analysis.

Geopolymer is the alternative to current construction material trends. In this paper, an attempt is made to produce a sustainable construction composite material using geopolymer. Ground granulated blast furnace slag (GGBS)-based geopolymer concrete was prepared and tested for different alkaline to binder ratios (A/B). The effect of various temperatures on compressive strength properties was assessed. The cubes were exposed to temperature ranging from 50 to 70 °C for a duration ranging from 2 to 10 h, and the compressive strength of the specimens was analyzed for destructive and non-destructive analysis and tested for 7, 28, and 90 days. The obtained compressive strength (CS) results were analyzed employing the probability plot (PP) curve, distribution overview curve (DOC), probability density function (PDF), Weibull, survival, and hazard function curve. Maximum compressive strength was achieved for the temperature of 70 °C and an A/B of 0.45 for destructive tests and non-destructive tests with 44.6 MPa and 43.56 MPa, respectively, on 90 days of testing. The survival and hazard function curves showed incremental distribution characteristics for 28 and 90 days of testing results with a probability factor ranging from 0.8 to 1.0.

Effects of temperature and light on the growth and reproduction of an endophytic pest alga Ectocarpus siliculosus (Ectocarpales) found in wild Gracilaria textorii (Gracilariales)

The genus Gracilaria is an economically important macroalgae group that has been cultivated worldwide on a commercial scale. Epiphytic algae are commonly found in both natural and cultured Gracilaria and have become one of the major concerns in the Gracilaria aquaculture. In contrast to the wide reports of epiphytic pests, the endophytic algae inGracilaria have rarely been reported. In this study, we isolated the brown filamentous endophytic macroalgae Ectocarpus siliculosus from the host wild Gracilaria textorii to investigate its growth and reproduction capability under environmental changes. We studied the effects of various temperatures and light levels on growth and reproduction for 12 days. The results revealed that the highest growth rate (26.65 ± 1.78 day−1) of the endophytic pest E. siliculosus was at 25 °C and 50 μmol photons m−2 s−1. Furthermore, the gametangium/sporangium formation and gamete/spore release of the pest E. siliculosus preferred 20 °C with medium and high light intensities. In contrast, the worst performances of growth (3.34 ± 0.49 day−1) and reproduction (0.13 ± 0.09 gametangia/sporangia) occurred at the highest temperature (25 °C) and light level (100 μmol photons m−2 s−1). Our study indicate that optimal temperature can stimulate the rapid growth of E. siliculosus, and the strategy of living inside seaweed helps E. siliculosus avoid the excessive sunlight, which is especially critical for the ones inhabiting on the intertidal rocks. The physiological characteristics of endophytic E. siliculosus may help to inform the best pest management strategies for Gracilaria aquaculture.

An efficient non-chromatographic method to separate human serum albumin from cryo-poor plasma

ABSTRACT Cryo-poor plasma (CPP) which remains after separating cryoprecipitate from the fresh frozen plasma (FFP) unit from human plasma has rare clinical application and can be stored for a maximum of 5 years, depending on storage temperature. In spite of its rare clinical applications that make it as the waste product in blood banking, it has higher concentrations (31.7 g/lit (±0.7)) of albumin than FFP (28.9 g/lit (±0.5)). In this study to develop a rapid, efficient, and inexpensive method to separate human serum albumin (HSA) from CPP, we have benefited from the advantage of the higher thermal stability of HSA. We have investigated the combination of heat treatment of CPP before applying polyethylene glycol as a preferential precipitating agent. In the first step, the effect of various temperatures on proteins’ precipitation profile has been investigated. The resulted effective temperatures (50 and 55 °C) are selected to treat CPP before mixing it with several concentrations and molecular weights of PEG. The pattern of precipitated proteins has been analyzed by the sodium dodecyl sulfate-PAGE and size exclusion chromatography methods. According to achieved data, PEG 8 kDa at concentrations of 20–25% (w/v), with previous heat treatment at 50 °C, showed the significant selective separation of HSA.

Influence of varying temperatures on toxicity of biorationals against diamondback moth, &lt;i&gt;Plutella xylostella&lt;/i&gt; L.

&lt;p&gt;Effect of various temperatures on the efficacy of five biorationals, viz. &lt;em&gt;Beauveria bassiana&lt;/em&gt; (1.15% WP), &lt;em&gt;Metarhizium anisopliae&lt;/em&gt; (1.15% WP), &lt;em&gt;Bacillus thuringiensis&lt;/em&gt; (0.5% WP), Azadirachtin (300 ppm) and Spinosad (45 SC) in terms of median lethal concentration (LC&lt;sub&gt;50&lt;/sub&gt;) value was evaluated against diamondback moth, &lt;em&gt;Plutella xylostella&lt;/em&gt; larvae. The toxicity data for biorationals against &lt;em&gt;P. xylostella&lt;/em&gt; on the basis of larval mortality revealed that &lt;em&gt;M. anisopliae&lt;/em&gt; (1.15% WP), &lt;em&gt;B. thuringiensis&lt;/em&gt; (0.5% WP), Azadirachtin (300 ppm) and Spinosad (45 SC) registered higher effectiveness (lower LC&lt;sub&gt;50&lt;/sub&gt; value) at 25°C whereas, increase in temperature led to declined efficacy of biorationals; whereas, use of entomopathogenic fungi, &lt;em&gt;B. bassiana&lt;/em&gt; (1.15% WP) was most effective at 30°C and revealed lower effectiveness (higher LC&lt;sub&gt;50&lt;/sub&gt; value) at 25° and 35° C temperatures. Data on the influence of temperature on toxicity of biorationals to &lt;em&gt;P. xylostella&lt;/em&gt; on the basis of adult emergence revealed lowest LC50 value for &lt;em&gt;B. thuringiensis&lt;/em&gt; (0.5% WP) at 25°C and the efficacy decreased with increase in the temperature, whereas, &lt;em&gt;M. anisopliae&lt;/em&gt; (1.15% WP), &lt;em&gt;B. bassiana&lt;/em&gt; (1.15% WP), Azadirachtin (300 ppm) and Spinosad (45 SC) were most effective at 30°C and the higher LC&lt;sub&gt;50&lt;/sub&gt; value were evident at temperature above 30°C, indicating the reduced efficacy of biorationals with increase in temperature beyond 30°C or preference for lower temperature regimes under laboratory conditions.&lt;/p&gt;

Effects of various temperature and pressure initial conditions to predict the thermal conductivity and phase alteration duration of water based carbon hybrid nanofluids via MD approach

Due to the presence of fluid flow inside channels in many natural and artificial systems and their widespread applications in recent years, attention to the issue of improving heat transfer is growing at an increasing rate. On the other hand, poor fluid heat transfer properties like water are a major obstacle to increasing heat transfer and making heat exchangers more efficient. At present work, hydrodynamic and thermal performances of liquid water in the attendance of two carbon structures (nanosheets of graphene and nanotubes of carbon) were examined by molecular dynamics simulation (MDS). At first, the atomic behavior of hybrid nanofluids was investigated by velocity and density profiles. Then, by studing the coefficient of conductivity (k) and duration of phase alteration in different initial conditions (different initial temperatures (t) and pressures (p)), the hydrodynamic and thermal performances of this mixture were presented. The results revealed with increasing initial t, the thermal conductivity and phase change duration changed from 0.68 W/m.K and 1.29 ns to 0.80 W/m.K and 1.05 ns. This change was due to the increase in the oscillation amplitude and the mobility of the particles in the box of simulation. Moreover, With increasing pressure in the structures, the amount of oscillation amplitude and the mobility of atomic structures decreased.