Tc Values Research Articles

Effect of ethanol leaf extract of Clerodendrum splendens (G. Don) (Verbenaceae) on some biochemical parameters of Alloxan-induced diabetic Wistar rats

BackgroundThe lack of significant breakthrough in the treatment of diabetes, a global threat has led to continuous search of herbs that contain bioactive constituents with hypoglycemic effect. The aim of this study was to evaluate the effects of ethanol leaf extract of Clerodendrum splendens on some biochemical parameters in alloxan-induced diabetic wistar rats. MethodThe induction of Diabetes to albino wistar rats was done intraperitoneally using 120 mg/kg body weight of Alloxan monohydrate and the diabetic rats were randomly divided into five groups of four rats each comprising Group I (Diabetic rats), Group II (normal control), group III (200 mg/kg of ethanol extract), group IV (400 mg/kg of ethanol extract) and group V (5 mg/kg Glibenclamide - standard drug). All treatments were administered orally once daily for 21 days. At the end of the treatment period, the blood sera of the blood samples from rats across the groups were collected and biochemical assays were carried out on them to evaluate their individual concentration of ALP, AST, ALT, TG, HDL, TC and LDL. ResultsA significant reduction (p<0.05) in the serum TC, TG, LDL-C and increased HDL-C was recorded in alloxan-induced diabetic treated groups. The ethanol leaf extract of Clerodendrum splendens at 200 and 400 mg/kg showed improving activities of the tested biochemical parameters. However, the group treated with 400 mg/kg showed more significant reduction (p<0.01) in the values of ALP (40.25±0.75), AST (25.25±3.84), ALT (3.25±0.25) and LDL (14.25±0.85).The 200 mg/kg showed more significant reduction in TC (67.25±2.59) than 400 mg/kg with TC value of 96.25±1.49. There was no significant effect on the TG value with 200 and 400 mg/kg while a significant increase (p<0.01) in HDL was recorded in the group treated with 200 and 400 mg/kg for HDL with 200 mg/kg showing more significant increase. ConclusionsThese findings revealed that Clerodendrum splendens has ameliorating activities on the lipid profile and liver function parameters of degenerating condition of diabetes mellitus associated secondary complications.

Superconducting ternary hydrides under high pressure

AbstractAchieving room‐temperature superconductivity is an important goal in chemistry and physics. Excitingly, pressure‐induced superconducting hydrides, a typical representative of LaH10 with a critical temperature (Tc) of 250–260 K around 180–200 GPa, bring this goal within reach, igniting an irresistible wave of discovering new H‐containing superconductors. Moreover, this breakthrough finding was achieved under the guidance of theoretical prediction. Thus far, the superconductivity of binary hydrides has been extensively explored. However, the high‐temperature superconductor, facilitating practical application, is still rare. Ternary hydrides can provide more abundant structures resulting from diverse chemical compositions and synergistic charge transfer, combine the merits of different elements, and induce strong electron–phonon coupling, which make them an appealing contender for superconductors. Recently, much research progress has been made in pressure‐induced superconducting ternary hydrides. In this regard, we summarize the recent development of superconducting ternary hydrides, highlighting the chemical composition, structure, pressure, and Tc value as well as the study of doping/substitution on the known superconducting binary hydrides. The recent state‐of‐the‐art of theoretical approaches for predicting superconductors and fundamental characters of ternary hydrides with high Tc are outlined. On the other hand, the problems, challenges, and opportunities are presented, providing an outlook for future research.This article is categorized under: Structure and Mechanism &gt; Computational Materials Science Electronic Structure Theory &gt; Density Functional Theory

Critical Thickness of Free-Standing Nanothin Films Made of Melted Polyethylene Chains via Molecular Dynamics.

The mechanical stability of nanothin free-standing films made of melted polyethylene chains was predicted via molecular dynamics simulations in the range of 373.15–673.15 K. The predicted critical thickness, , increased with the square of the temperature, T, with additional chains needed as T increased. From T = 373.15 K up to the thermal limit of stability for polyethylene, values were in the range of nanothin thicknesses (3.42–5.63 nm), which approximately corresponds to 44–55 chains per 100 nm2. The density at the center of the layer and the interfacial properties studied (density profiles, interfacial thickness, and radius of gyration) showed independence from the film thickness at the same T. The polyethylene layer at its showed a lower melting T (<373.15 K) than bulk polyethylene.

Observation of nearly identical superconducting transition temperatures in the pressurized Weyl semimetals MIrTe4 ( M=Nb and Ta)

Here we report the observation of pressure-induced superconductivity in type-II Weyl semimetal (WSM) candidate NbIrTe4 and the evolution of its Hall coefficient (RH), magnetoresistance (MR), and lattice with increasing pressure to ~57 GPa. These results provide a significant opportunity to investigate the universal high-pressure behavior of ternary WSMs, including the sister compound TaIrTe4 that has been known through our previous studies. We find that the pressure-tuned evolution from the WSM to the superconducting (SC) state in these two compounds exhibit the same trend, i.e., a pressure-induced SC state emerges from the matrix of the non-superconducting WSM state at ~ 27 GPa, and then the WSM state and the SC state coexist up to 40 GPa. Above this pressure, an identical high-pressure behavior, characterized by almost the same value of RH and MR in its normal state and the same value of Tc in its SC state, appears in both compounds. Our results not only reveal a universal connection between the WSM state and SC state, but also demonstrate that NbIrTe4 and TaIrTe4 can make the same contribution to the normal and SC states that inhabit in the high-pressure phase, although these two compounds have dramatically different topological band structure at ambient pressure.

Association between serum alanine and aspartate aminotransferase and blood pressure: a cross-sectional study of Chinese freshmen

BackgroundHigh blood pressure is a well-recognized risk factor for cardiovascular events, and the incidence of hypertension is increasing among young people. This study investigated the relationship between ALT and AST levels and hypertension among freshmen in China.MethodsThis cross-sectional study was conducted in the Anhui Province from September to November 2018. A total of 3114 freshmen underwent a physical examination including testing of biochemical indicators and a standardized questionnaire.ResultsThe overall prevalence of elevated ALT and AST were 6.8% and 2.3% among freshmen. The mean ALT and AST levels were higher in males (22.59 ± 21.98 vs.12.62 ± 10.30 U/L; 23.55 ± 12.24 vs. 20.02 ± 5.75 U/L, respectively). The prevalence of hypertension was significantly higher in men (16.1%) than in women (1.9%). The mean values of BMI, SBP, DBP, TC, TG, and LDL-C were found to be increased with elevated levels of serum ALT and AST in the quartiles (P for trend < 0.05). After adjusting for covariates, the risk of hypertension was significantly higher in the highest ALT quartile than in the lowest quartile (OR (95% CI) of 1.681 (1.028, 2.751) in males; 2.802 (1.102, 7.124) in females). A strong linear relationship was found between serum ALT levels and the odds of hypertension after adjustment for potential confounders only in total population and females (P for trend < 0.05).ConclusionsThese findings suggest that ALT level is significantly associated with hypertension both in male and female freshmen.

Cross-Sectional Analysis of the Involvement of Interleukin-17A in Diabetic Retinopathy in Elderly Individuals with Type 2 Diabetes Mellitus.

BackgroundTo investigate the correlation between serum interleukin-17A (IL-17A) levels and diabetic retinopathy (DR) in elderly individuals with type 2 diabetes mellitus (T2DM).MethodsThe study included 194 elderly patients (94 males and 100 females) with T2DM. Digital retinal photography as well as fundus fluorescein angiography was employed to distinguish between nonproliferative diabetic retinopathy (NPDR) and proliferative diabetic retinopathy (PDR). In addition, multiple logistic regression analysis was conducted to determine the correlation between serum IL-17A levels and DR status.ResultsThe average age of the study cohort was 69.14 ± 6.33 years, of which 52.08% were male. The study participants with the highest IL-17A (Q4) levels had higher TC, DBP, and low-density lipoprotein cholesterol (LDL-C) values than those the other groups. Analysis using unadjusted and adjusted linear regression revealed that the effect size of 1.09 for DR in the unadjusted model indicates that IL-17A is associated with an increase of 1.09 in DR (mmol/L) (β 1.09, 95% confidence interval (CI) 1.03, 1.16). Using the minimum-adjusted model (the model 2), as IL-17A increased, DR was higher by 1.11 (β 1.11, 95% CI 1.04, 1.18). With the fully adjusted model (the model 3), for each additional IL-17A increase, DR was higher by 1.15 (β 1.15, 95% CI 1.06, 1.24).ConclusionSerum IL-17A levels are apparently positively correlated to DR in Chinese elderly individuals with T2DM.

Superconducting interstitial MoReRuCx medium-entropy alloys with a hexagonal structure

We report the results of structural and physical studies on the MoReRuCx medium-entropy alloys (MEAs) with x varying from 0 to 0.20. In the whole x range, a single hexagonal phase is formed. The variation of lattice parameters indicates that carbon atoms are located at the interstitial site for x ≤ 0.10 while occupy both the interstitial and substitutional sites at higher x values, which is corroborated by the x-ray photonelectron spectroscopy (XPS) results. Moreover, the resistivity, magnetic and thermodynamic measurements evidence that these MEAs are bulk fully gapped superconductors. In particular, the transition temperature Tc displays a dome-like dependence on carbon content with a maximum of 9.62 K at x = 0.05, whereas a maximal zero-temperature upper critical field Bc2(0) of 10.5 T is achieved at x = 0.10. For all MEAs, the specific heat data reveal the existence of an inhomogeneous superconducting state, which is discussed in relation to the chemical inhomogeneity and strong atomic disorder. In addition, we show that the key factors that control superconductivity are essentially the same for both MoReRuCx and ReCx, despite their very different Tc values. Our work not only provides the first series of interstitial MEAs with a hexagonal structure, but also demonstrates a feasible way to tune the superconductivity in multicomponent alloys.

VLE measurements of biphenyl in supercritical binary mixture of (0.527propane/0.473n-butane)

In the present work, new VLE data of biphenyl in supercritical binary mixture (solvent) of (0.527propane/0.473n-butane) are reported for three selected isotherms of (403, 423, and 443) K for pressures up to 6.65 MPa. The VLE property (PTxy) measurements were performed using a new recently developed high-pressure and high-temperature optical cell with a volume of 117 cm3. The concentrations of the liquid and gas equilibrium phases were measured independently without breaking the phase equilibrium (PT) conditions during the sampling procedure from each phase. This allows considerable increase the accuracy of the concentration determination of the equilibrium phases using gravimetric method, especially for vapor phase. The values of the critical parameters TC=403±0.2K,PC=4.25±0.03MPa,x=0.051±0.006 mole fraction of biphenyl; TC=423±0.2 K,PC=5.55±0.03MPa,x=0.06±0.006 mole fraction of biphenyl; and TC=443±0.2K,PC=6.80±0.03MPa,x=0.09±0.006 mole fraction of biphenyl for the mixture (0.527 propane / 0.473n-butane) + biphenyl have been estimated from the experimental VLE data near the critical point. The measured VLE properties (PTxy relationship) of (0.527 propane / 0.473n-butane) + biphenyl mixture was presented in various projections P-x for different isotherms, T-x for various isobars, and P-T projection. The combined expanded uncertainty of the temperature, pressure, and concentration measurements at 0.95 confidence level with a coverage factor of k = 2 is estimated to be 0.15 K, 0.22 % (or 0.0022P), and 0.03, respectively.

Influence of Cultivation Conditions on the Sioxanthin Content and Antioxidative Protection Effect of a Crude Extract from the Vegetative Mycelium of Salinispora tropica.

Due to their bioavailability, glycosylated carotenoids may have interesting biological effects. Sioxanthin, as a representative of this type of carotenoid, has been identified in marine actinomycetes of the genus Salinispora. This study evaluates, for the first time, the effect of cultivation temperature (T) and light intensity (LI) on the total cellular carotenoid content (TC), antioxidant activity (AA) and sioxanthin content (SX) of a crude extract (CE) from Salinispora tropica biomass in its vegetative state. Treatment-related differences in TC and SX values were statistically significantly and positively affected by T and LI, while AA was most significantly affected by T. In the S. tropica CE, TC correlated well (R2 = 0.823) with SX and somewhat less with AA (R2 = 0.777). A correlation between AA and SX was found to be less significant (R2 = 0.731). The most significant protective effect against oxidative stress was identified in the CE extracted from S. tropica biomass grown at the highest T and LI (CE-C), as was demonstrated using LNCaP and KYSE-30 human cell lines. The CE showed no cytotoxicity against LNCaP and KYSE-30 cell lines.

Structural and superconducting properties of low-density Bi(Pb)-2223 superconductor: Effect of Eu2O3 nanoparticles addition

This paper presented the result of the structural analysis of Europium, Eu nanoparticles addition in low-density Bi(Pb)-2223 superconductor. Polycrystalline bulks with nominal composition Bi1.6Pb0.4Sr2Ca2Cu3Oy + xEu2O3 samples where x = 0.0, 0.2, 0.4, 0.6 and 0.8 wt% were prepared via solid-state reaction method. Low-density samples were created by adding crystalline sucrose into mixed powders and burn at 400 °C for two hours. The samples were characterized using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) for structural characterization while resistivity measurement was determined by using four-point probe method. Phase analysis by XRD indicated that both Bi-2212 and Bi-2223 phases coexist within the samples having a tetragonal crystal structure. As Eu concentration increases, the amount of Bi-2223 phase slightly decreased which signifies that Eu nanoparticles favour the growth of Bi-2212 phase. It was observed that the highest Tc and Jc values for the addition sample found at x = 0.2 wt%.

Insight into the Temperature Evolution of Electronic Structure and Mechanism of Exchange Interaction in EuS.

Discovered in 1962, the divalent ferromagnetic semiconductor EuS (TC = 16.5 K, Eg = 1.65 eV) has remained constantly relevant to the engineering of novel magnetically active interfaces, heterostructures, and multilayer sequences and to combination with topological materials. Because detailed information on the electronic structure of EuS and, in particular, its evolution across TC is not well-represented in the literature but is essential for the development of new functional systems, the present work aims at filling this gap. Our angle-resolved photoemission measurements complemented with first-principles calculations demonstrate how the electronic structure of EuS evolves across a paramagnetic-ferromagnetic transition. Our results emphasize the importance of the strong Eu 4f-S 3p mixing for exchange-magnetic splittings of the sulfur-derived bands as well as coupling between f and d orbitals of neighboring Eu atoms to derive the value of TC accurately. The 4f-3p mixing facilitates the coupling between 4f and 5d orbitals of neighboring Eu atoms, which mainly governs the exchange interaction in EuS.

YBa2Cu3O7 films grown onto SrTiO3 and YSZ substrates by chemical solution deposition of trifluoroacetates

We report the preparation and characterization of YBa2Cu3O7 (YBCO) films grown onto SrTiO3 and YSZ substrates by the trifluoroacetates chemical solution deposition method and following sintering with oxygen atmosphere at 860 °C. The X-ray diffraction (XRD) reveals (00ℓ) – oriented crystallites indicating epitaxial growth of the films in the c-direction. Despite granular morphology and the presence of Y2BaCuO5 and CuO as minor secondary phases, the technique shows the successful formation of the superconducting YBCO and preventing the formation of the unwanted BaCO3 phase. Rocking curve measurements of the (005) reflection for the YBCO/SrTiO3 was fitted with one Gaussian function with full width at the half maximum (FWHM) of 0.44° confirming that it consists of YBCO crystallites with different texture. For the sample grown on YSZ, the rocking curve was fitted with two Gaussian functions, one corresponding to the YBCO layer (FWHM = 0.4°) and another to the substrate (FWHM = 0.3°). The magnetic measurements taken in zero field cooling and field cooling modes confirm the formation of the superconducting YBCO with critical temperatures (TC) 91.8 and 85.7 K for the samples grown onto YSZ and SrTiO3, respectively. The critical current density (JC) curves indirectly calculated by using the Bean´s model from the M(T) loops were JC ~ 109 A/cm2 for the sample deposited onto YSZ and JC ~ 107A/cm2 for the YBCO deposited onto SrTiO3. Overall, the difference in TC and JC values between both samples could be related to their difference in oxygen content, porosity, hole concentration per Cu ion and the presence of secondary phases.

Magnetic properties of the perovskite GdCuO3: Monte Carlo simulation

In this article, magnetic properties of the perovskite GdCuO3 have been investigated by Monte Carlo simulation in the frame of the Ising model for different sizes of system. Interaction couplings have been calculated, phase diagrams of ground state have been established and the orthorhombic crystal structure has been deduced. Couplings of first, second and third order interactions were found respectively 71.016 K, 51.057 K and 26.805 K. The system is an antiferromagnetic order at the ground state. Simulation results showed that the Curie temperature TC of GdCuO3 system is around 750 K. In addition, it has been observed that as the size of the lattice increases, critical temperature also increases. Based on the results this material could be considered a good candidate for applications requiring higher TC values.

Organic Field-Effect Transistors with Bottlebrush Polymer Gate Dielectrics Thermally Cross-Linked in Less Than 1 min

We report high-performance and air-stable organic field-effect transistors (OFETs) fabricated with thermally cross-linked bottlebrush polymers as gate dielectrics. By synthesizing bottlebrush polymers with a varying degree of polymerization, we investigate the effect of the density of alkyne functional groups on the on-set cross-linking time (tc) and dielectric properties of the bottlebrush polymer thin films. The bottlebrush polymer with the highest density of alkyne groups shows the lowest tc of 0.6 min, and tc values increase to 0.8, 1, and 30 min as the density of alkyne groups decreases. These tc values are unambiguously shorter than that (tc > 120 min) of the most widely used polymer gate dielectric, poly(methyl methacrylate) (PMMA). The top-gate/bottom-contact OFET fabricated with poly{[N,N′-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′-bithiophene)} and the bottlebrush polymer gate dielectric cross-linked in 1 min shows the highest charge carrier mobility (μ = 0.16 cm2 V–1 s–1) and extended device lifetime (120 h) compared to those of OFETs fabricated with the other bottlebrush polymers and PMMA gate dielectrics. Considering the sufficiently reduced tc (≤1 min) and excellent device properties of bottlebrush polymers, these results demonstrate that thermally cross-linkable bottlebrush polymers without any cross-linking agents would be promising materials for developing high-performance and reliable OFETs fabricated by a high-throughput fabrication method.

Monitoring and Mapping Vineyard Water Status Using Non-Invasive Technologies by a Ground Robot

There is a growing need to provide support and applicable tools to farmers and the agro-industry in order to move from their traditional water status monitoring and high-water-demand cropping and irrigation practices to modern, more precise, reduced-demand systems and technologies. In precision viticulture, very few approaches with ground robots have served as moving platforms for carrying non-invasive sensors to deliver field maps that help growers in decision making. The goal of this work is to demonstrate the capability of the VineScout (developed in the context of a H2020 EU project), a ground robot designed to assess and map vineyard water status using thermal infrared radiometry in commercial vineyards. The trials were carried out in Douro Superior (Portugal) under different irrigation treatments during seasons 2019 and 2020. Grapevines of Vitis vinifera L. Touriga Nacional were monitored at different timings of the day using leaf water potential (Ψl) as reference indicators of plant water status. Grapevines’ canopy temperature (Tc) values, recorded with an infrared radiometer, as well as data acquired with an environmental sensor (Tair, RH, and AP) and NDVI measurements collected with a multispectral sensor were automatically saved in the computer of the autonomous robot to assess and map the spatial variability of a commercial vineyard water status. Calibration and prediction models were performed using Partial Least Squares (PLS) regression. The best prediction models for grapevine water status yielded a determination coefficient of cross-validation (r2cv) of 0.57 in the morning time and a r2cv of 0.42 in the midday. The root mean square error of cross-validation (RMSEcv) was 0.191 MPa and 0.139 MPa at morning and midday, respectively. Spatial–temporal variation maps were developed at two different times of the day to illustrate the capability to monitor the grapevine water status in order to reduce the consumption of water, implementing appropriate irrigation strategies and increase the efficiency in the real time vineyard management. The promising outcomes gathered with the VineScout using different sensors based on thermography, multispectral imaging and environmental data disclose the need for further studies considering new variables related with the plant water status, and more grapevine cultivars, seasons and locations to improve the accuracy, robustness and reliability of the predictive models, in the context of precision and sustainable viticulture.

Microstructure and Superconducting Properties of Rapid Heating, Quenching, and Transformation (RHQT) Powder‐in‐Tube Nb3Al Wires Doped with Sn Element

Properties of rapid heating, quenching, and transformation (RHQT)‐treated powder‐in‐tube (PIT) Nb3Al1−xSnx wires are studied herein. After the RHQ process, the body‐centered cubic (bcc) phase is formed in the Sn‐doped Nb3Al wires. The transformed superconducting A15 phase shows a uniform microstructure and homogenous component distribution feature. With the increase of the Sn doping level, the critical transition temperature (Tc), critical current density (Jc), and irreversibility field (Birr) of the superconducting wires increase first and then reduce, achieving the highest Tc value of 17.6 K and the smallest ΔTc of 0.6 K in the 4% Sn doped Nb3Al wire. The 4% Sn addition helps to improve the layer Jc of the sample to 2.1 × 105 A cm−2 at 8 K and 5 T, which is about 2.5 times that of the pure Nb3Al sample. Furthermore, the Nb3Al1−xSnx (x = 0.04) wire gives the highest Birr value of 17.22, 13.23, and 9.11 T at 8, 10, and 12 K, respectively. The addition of Sn helps to achieve stoichiometric Nb3Al A15 phase and formation of precipitations with the size of 10 nm, which might act as the flux‐pinning center.

Preparation and characterization of gadolinium-based thermosensitive liposomes: A potential nanosystem for selective drug delivery to cancer cells

Gadodiamide (Gd-DTPA-BMA) is a gadolinium-based complex, used as a contrast agent in magnetic resonance imaging procedures. Recent studies revealed the capacity of this complex of inducing apoptosis in neoplastic cells. However, a great challenge for its use as an anticancer drug is low cellular internalization and drug delivery systems such as thermosensitive liposomes can be a strategy to overcome these limitations and increase anti-tumor efficacy. In this context, this study aimed to develop, characterize, and assess the cytotoxic activity and selectivity index of thermosensitive liposomes containing Gd-DTPA-BMA. Formulations were prepared by the lipid film hydration method and their physicochemical, morphological, and thermal properties were evaluated. Cell viability was performed 4T1/MDA-MB-231 tumor cells and WI-26 VA4 normal cells. Transmission electron microscopy analyses showed high electron density in the inner core of Gd-DTPA-BMA-loaded liposomes that can be attributed to the Gd-DTPA-BMA, since Gd-loaded nanosystems present low light transmittance and high electron density by this technique. The dynamic light scattering, differential scanning calorimetry, small-angle X-ray scattering, and in vitro release results confirm that the lipid composition was suitable since Tc (temperature of the transition Lβ → Lα) values are in accordance with those reported for thermosensitive liposomes used in the treatment of cancer. The cytotoxic studies against breast cancer cell lines demonstrated that the Gd-DTPA-BMA-loaded liposomes have higher cytotoxicity than free Gd-DTPA-BMA. Moreover, these liposomes presented minimal toxicity in a normal cell line when compared to the free Gd-DTPA-BMA. Therefore, the results of this study suggest that thermosensitive liposomes containing Gd-DTPA-BMA might be a new promising nanocarrier system for breast cancer treatment.

Effect of the fluorine substitution for oxygen in the heavily Pb-doped Bi-2212 phase of (Bi, Pb)2(Sr, Ba)2CaCu2O8

Polycrystalline samples of the Bi-2212 phase of Bi2−x Pb x Sr2CaCu2O8−z F z with x(Pb) = 0.6 and 1.0 have been prepared. All the samples are almost of the single phase with the Bi-2212 structure for x(Pb) = 0.6. The value of Tc ∼ 82 K for z(F) = 0 increases up to 86–88 K for z(F) = 0.2–0.6. This may be due to the decrease in the amount of vacancy at the O-site by the introduction of F−. In addition, we have successfully synthesized the partially Ba-substituted Bi-2212 phase of Bi1.4Pb0.6Sr2−y Ba y CaCu2O7.8F0.2 with 0 ≤ y(Ba) ≤ 0.5. Tc increases up to 98 K for y(Ba) = 0.5. The enhancement of Tc through the Ba-substitution may be due to the increase in the distance between Cu and the apical oxygen.

Effect of co-substitution on superconductivity in (Y, Ca)(Ba, Sr)2Cu4O8 prepared by the molten KOH method

Effect of co-substitution of Ca and Sr in the Y-124 phase of Y1-x CaxBa2-y Sr y Cu4O8 has been investigated. Polycrystalline samples of Y1-x CaxBa2-y Sr y Cu4O8 with 0 ≤ x(Ca) ≤ 0.2 and 0 ≤ y(Sr) ≤ 0.2 have been prepared by the molten KOH method. The lattice parameters decrease with increasing y(Sr), indicating that the smaller Sr ions are systematically substituted for the larger Ba ions. The value of Tc increases from 83 K to ∼ 90 K through the Sr-substitution for x(Ca) = 0, while Tc ∼ 90 K are almost independent of y(Sr) for x(Ca) = 0.1 and 0.2.

ANALYSIS OF TOTAL FACTOR PRODUCTIVITY GROWTH IN THE INDUSTRY OF TEXTILE AND TEXTILE PRODUCTS IN INDONESIA

This study aims to analyze the growth of TFP in the textile industry and textile product (TPT) in Indonesia. Productivity analysis is carried out to determine the extent of performance development and how efficient the textile industry in Indonesia. Calculation of the growth value of Total Factor Productivity (TFP) by decomposing the components of TFP namely TEC, TC, and SEC using the Stochastic Frontier Analysis (SFA). This study uses the type of firm level TPT data in the years 2010-2014. The data used is secondary data which is the result of an annual survey of large and medium manufacturing industry companies conducted by the Central Statistics Agency (BPS) in the form of raw data. The data is in the form of unbalance raw data which is then selected and adjusted to balance data. With 2 industry groups namely the textile industry (ISIC 13) and the garment industry (ISIC 14). Based on the results of the study showed that the average value of TFP growth in 2010-2014 experienced negative growth or &lt;1, this is due to the average growth value of TEC, SEC, and TC which decreased and tended to have negative values in the study period. This shows that the level of efficiency, use of technology, and scale of efficiency of the textile industry tends to be weak in the 2010-2014 period. The reduced level of industrial productivity can affect the decline in the competitiveness of textile products in the global market. Keywords: Textile Industry and Textile Products (TPT), Total Factor Productivity (TFP), Stochastic Frontier Analysis (SFA)Jel : L67, C23; O47