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Ablal, MA, FD Jarad, and AA Adeyemi. "The Erosion Properties of Chlorine Dioxide and Hydrogen Peroxide on Bovine Teeth." International Journal of Dentistry and Oral Science (IJDOS) 2, no. 2 (2015): 42–46. https://doi.org/10.19070/2377- 8075-1500010.
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Objectives: The aim of this study was to assess the erosion potential of chlorine dioxide and hydrogen peroxide on bovine teeth. Methods: Sixty bovine crowns were ground and polished to give flat surfaces. The crowns were subjected to heavy staining cycles then equally divided into 3 treatment groups; chlorine dioxide (ClO2), hydrogen peroxide (H2O2), and deionised water (H2O). Specimens in each group were immersed in 150 ml of the treatment for seven 2 min cycle in addition to an extra 30 min cycle. Specimens were gently dried after each 2 min cycle to take quantitative light-induced fluorescence (QLF) images while non- contact light profilometry (NCLP) scans were performed at the end of the seven 2 min and the extra 30 min cycles. Results: ClO2 specimens showed a significant increase in %ΔF only after the first 2 min cycle (p < 0.05); however, a significant increase in %ΔF within H2O2 specimens was found at the end of the seven recommended treatment cycles (p < 0.05). Conclusion: Chlorine dioxide does cause enamel erosion but to a lesser extent than that caused by hydrogen peroxide.
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Ngoi, Kok Kwong, and Hieng Kiat Jun. "Study of fabrication of fully aqueous solution processed SnS quantum dot-sensitized solar cell." Green Processing and Synthesis 8, no. 1 (2019): 443–50. http://dx.doi.org/10.1515/gps-2019-0012.
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Abstract In this prelimnary work, the aim was to fabricate a simple tin (II) sulfide (SnS) quantum dot-sensitized solar cell (QDSSC) from aqueous solution. The SnS QDSSCs were characterized by using current-voltage test (I-V test), scanning electron microscopy (SEM), and ultraviolet-visible (UV-Vis) spectroscopy. SEM results showed the presence of TiO2 and SnS elements in the sample, confirming the successful synthesis of SnS quantum dots (QDs). The overall efficiency of QDSSCs increased when concentration of the precursor solutions, which were aqueous sodium sulfide and tin (II) sulfate decreased from 0.5 M to 0.05 M. On the other hand, for a fixed precursor concentration, the efficiency of QDSSC reduced once an optimal cycle of of successive ionic layer adsorption and reaction (SILAR) was achieved. The bandgap energies of QDs obtained by extrapolating the Tauc plot were used to predict the QDs size. In general, the QD size was bigger for samples prepared from precursor concentration of 0.5 M, and with higher number of SILAR cycle used. The best performance was obtained from sample prepared from 0.05 M precursor concentration with 4 SILAR cycles.
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Nasution, Yunidar Hayani, Nurhabibi, and Arifah. "Improving Student Learning Outcomes by Using Cooperative Learning Model on Q.S. Al-Hujurat Verse 13 Material in Elementary Schools." DARUSSALAM: Scientific Journal of Islamic Education 1, no. 1 (2024): 34–42. https://doi.org/10.62945/darussalam.v1i1.212.
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This study aims to improve student learning outcomes in Islamic education learning using the cooperative learning model. This study uses a type of classroom action research. The design of this study uses the Kemmis & Mctaggart design with four steps, namely planning, action, observation and reflection. The subjects of this study were elementary school students. Data were obtained using test and observation techniques. The data obtained were then analyzed using descriptive statistical techniques. The results of the study indicate that the cooperative learning model can improve student learning outcomes in Islamic education learning. This can be seen in cycle I with an average percentage of 50% and in cycle II by 86%. So it can be stated that student learning outcomes have developed in cycle II. Improving student learning outcomes through the application of the cooperative learning model on the material of Q.S. Al-Hujurat Verse 13 was carried out for two cycles. Learning outcomes in cycle I were 66.67% and in cycle II by 76.67%. So it can be said that student learning outcomes improved better in cycle II. Based on this, the cooperative learning model can be used as one of the media that can be considered by teachers to overcome the problem of low student learning outcomes in Islamic religious education learning.
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Nurlaili, Laila Khairani, and Nurlatifah. "Improving Reading Ability of Q.S. An-Nasr with Demonstration Method and Problem Based Learning Model in Elementary School Students." DARUSSALAM: Scientific Journal of Islamic Education 1, no. 1 (2024): 22–33. https://doi.org/10.62945/darussalam.v1i1.211.
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This study aims to improve students' reading ability in the letter An-Nasr by using the demonstration method and problem-based learning model. This study uses a type of classroom action research. The design of this study uses the Kemmis & Mctaggart design with four steps, namely planning, action, observation and reflection. The subjects of this study were elementary school students. Data were obtained using test and observation techniques. The data obtained were then analyzed using descriptive statistical techniques. The results of the study indicate that the demonstration method and problem-based learning model can improve students' reading ability in the letter An-Nasr in Islamic religious education learning. This can be seen in cycle I with an average percentage of 50% and in cycle II of 86%. So it can be stated that students' reading ability developed in cycle II. Improving students' reading ability through the application of the demonstration method and problem-based learning model on the material of the letter An-Nasr was carried out for two cycles. Learning outcomes in cycle I were 66.67% and in cycle II of 76.67%. So it can be stated that students' reading ability improved better in cycle II. Based on this, the demonstration method and problem-based learning model can be used as one of the media that can be considered by teachers to overcome the problem of low ability to read the Al-Quran in Islamic religious education learning.
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Chen, Ningning, Wei Zhou, Minzhe Chen, et al. "In Situ Phase Separation Strategy to Construct Zinc Oxide Dots-Modified Vanadium Nitride Flower-like Heterojunctions as an Efficient Sulfur Nanoreactor for Lithium-Sulfur Batteries." Materials 18, no. 11 (2025): 2639. https://doi.org/10.3390/ma18112639.
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Exploring advanced sulfur cathode materials is important for the development of lithium-sulfur batteries (LSBs), but they still present challenges. Herein, zinc oxide dots-modified vanadium nitride flower-like heterojunctions (Zn-QDs-VN) as sulfur hosts are prepared by a phase separation strategy. Characterizations confirm that the flower structure with high specific surface area and pores improves active site exposure and electron/mass transfer. In situ phase separation enriches the Zn-QDs-VN interface, addressing the issues of uneven distribution and interface reduction of Zn-QDs-VN. Further theoretical computations reveal that ZnO-QDs-VN with optimized intermediate spin states can constitute a stable LiS* bond sequence, which can conspicuously facilitate the adsorption and conversion of LiPSs and reduce the battery reaction energy barrier. Therefore, the ZnO-QDs-VN@S cathode shows a high initial specific capacity of 1109.6 mAh g−1 at 1.0 C and long cycle stability (maintaining 984.2 mAh g−1 after 500 cycles). Under high S loading (8.5 mg cm−2) and lean electrolyte conditions (E/S = 6.5 μL mg−1), it also exhibits a high initial area capacity (10.26 mAh cm−2) at 0.2 C. The interfacial synergistic effect accelerates the adsorption and conversion of LiPSs and reduces the energy barriers in cell reactions. The study provides a new method for designing heterojunctions to achieve high-performance LSBs.
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Szwech, Julia, Gabriela Blecharz, Natalia Jańczyk, et al. "The Effects of Hormonal Contraception on Physical Performance and Health of Female Athletes: A Systematic Review." Quality in Sport 40 (April 3, 2025): 59410. https://doi.org/10.12775/qs.2025.40.59410.
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Introduction Physical performance and health of female athletes are influenced by physiological changes from the menstrual cycle and hormonal contraception (HC). Hormonal fluctuations can affect muscle strength, endurance, regeneration, and psychological well-being, impacting sports results. HC prevents pregnancy, regulates menstrual cycles and alleviates premenstrual syndrome symptoms. However, it can also cause side effects such as nausea, headaches, weight gain, and mood swings. Aim of the study The aim of the study was to analyze the effects of hormonal contraception on the physical performance and health of female athletes. Materials and methodsThe article was created based on the PubMed and Cochrane databases. The literature was analyzed using following keywords: hormonal contraception, menstrual cycle, athletes, sex hormones, physical performance Results HC stabilizes hormone levels, potentially reducing performance fluctuations associated with the menstrual cycle. Some studies indicate a slight reduction in aerobic capacity and muscle strength in women using HC, compared to those with a natural cycle. In addition, HC has a positive effect on regeneration after intense training and reducing the risk of overtraining. Athletes reported better sleep quality and fewer cycle-related symptoms, allowing them to train more regularly. What is more, some research highlights estrogen’s anti-inflammatory effect, which supports muscle repair. Conclusion The use of HC use appears to have a minor impact on physical performance, especially among team athletes. However, subjective benefits may improve training comfort. Further research is needed to explore HC’s effects across various sports disciplines.
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Jigyasu, Aditya Kumar, Sahabjada Siddiqui, Asif Jafri, Md Arshad, Mohatashim Lohani, and Irfan Ali Khan. "Biological Synthesis of CdTe Quantum Dots and Their Anti-Proliferative Assessment Against Prostate Cancer Cell Line." Journal of Nanoscience and Nanotechnology 20, no. 6 (2020): 3398–403. http://dx.doi.org/10.1166/jnn.2020.17316.
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Quantum dots (QDs) are semiconducting materials which have a wide array of applications starting from semiconducting devices, in humidity and pressure sensors and in medical imaging including cancer therapy. In the present study, cadmium telluride (CdTe) QDs were synthesized by a biological method using yeast cells, Saccharomyces cerevisiae in modified Czapek’s medium. QDs were characterized by transmission electron microscopy and X-ray diffraction. Cancer cells were treated with 2, 4, 8 and 16 μM concentrations of CdTe QDs for 24 h. The anti-proliferative activity was determined by using MTT assay, by evaluating the production of reactive oxygen species (ROS), and also by nuclear apoptosis and cell cycle analysis using a flow cytometer against human prostate carcinoma cell line PC-3. The size of the CdTe QDs was approximately 2 nm. In vitro anti-proliferative study showed that CdTe QDs induced cell death and nuclear apoptosis in a dosedependent manner. CdTe QDs induced significant increase in ROS level in PC-3 cells which was dose-dependent. Moreover, CdTe also arrested growth of PC-3 cells in the G2/M phase of the cell cycle. This study elucidates the apoptotic activity of CdTe QDs on prostate carcinoma which could provide useful insights to researchers for its clinical application.
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Brahma, Sanjaya, Cheung-Yi Wang, Yi-Hsuan Huang, Wen-Feng Lin, and Jow-Lay Huang. "One-Pot Bottom-Up Synthesis of SiO2 Quantum Dots and Reduced Graphene Oxide (rGO) Nanocomposite as Anode Materials in Lithium-Ion Batteries." C 11, no. 1 (2025): 23. https://doi.org/10.3390/c11010023.
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Here, crystalline SiO2 quantum dots (QDs) of 3–5 nm size were grown within the layers of reduced graphene oxide (rGO) by a solution mode chemical growth process at a relatively low temperature (100 °C). The composite was applied as a negative electrode in a Li-ion half-cell battery and the electrochemical investigation confirmed a distinct first-cycle discharge/charge capacity (~865 mAhg−1/387 @ 51 mAg−1). The battery could retain a capacity of 296 mAhg−1 after 60 charge/discharge cycles with 99% coulombic efficiency. Furthermore, at a high current rate of 1.02 Ag−1, the battery was able to display an apparent rate capability (214.47 mAhg−1), indicating the high chemical and mechanical stability of the composite at a high current rate. A structural analysis revealed clear distinct diffraction peaks of SiO2 and high-resolution transmission electron microscopy images showed discrete atomic planes, thereby confirming the growth of crystalline SiO2 QDs within the layers of rGO.
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POST, Paul. "Life Cycle Rituals." Questions Liturgiques/Studies in Liturgy 83, no. 1 (2002): 10–29. http://dx.doi.org/10.2143/ql.83.1.565697.
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Jeon, Eun-Young, and Su-Young Lee. "Remineralization effect according to application cycle of fluoride varnish: QLF-D analysis." Journal of Korean society of Dental Hygiene 16, no. 4 (2016): 525–30. http://dx.doi.org/10.13065/jksdh.2016.16.04.525.
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Jun, H. K., M. A. Careem, and A. K. Arof. "Fabrication, Characterization, and Optimization of CdS and CdSe Quantum Dot-Sensitized Solar Cells with Quantum Dots Prepared by Successive Ionic Layer Adsorption and Reaction." International Journal of Photoenergy 2014 (2014): 1–14. http://dx.doi.org/10.1155/2014/939423.
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CdS and CdSe quantum dot-sensitized solar cells (QDSSCs) were used for the study of determining the optimum preparation parameters that could yield the best solar cell performance. The quantum dots (QDs) were coated on the surface of mesoporous TiO2layer deposited on FTO substrate using the successive ionic layer adsorption and reaction (SILAR) method. In this method the QDs are allowed to grow on TiO2by dipping the TiO2electrode successively in two different solutions for predetermined times. This method allows the fabrication of QDs in a facile way. Three preparation parameters that control the QD fabrication were investigated: concentration of precursor solutions, number of dipping cycles (SILAR cycles), and dipping time in each solution. CdS based QDSSC showed optimum performance when the QDs were prepared from precursor solutions having the concentration of 0.10 M using 4 dipping cycles with the dipping time of 5 minutes in each solution. For CdSe QDSSC, the optimum performance was achieved with QDs prepared from 0.03 M precursor solutions using 7 dipping cycles with 30 s dipping time in each solution. The QDs deposited on TiO2surface were characterized using UV-vis absorption spectroscopy, FESEM, and TEM imaging.
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Zuo, Huaqin, Fan Wang, Di Zhou, et al. "Anti-Tumor Effect of a Novel DOX/GA-CdTe QD was Mediated by Apoptotic and Autophagic Cell Death." Nano 12, no. 01 (2017): 1750011. http://dx.doi.org/10.1142/s1793292017500114.
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Burkitt’s lymphoma is a highly proliferative B-cell malignancy characterized by MYC oncogene translocation. Intensive short-cycle chemotherapy could effectively improve the outcome of this disease. However, drug resistance limits the treatment of refractory/relapsed disease. Thus, we constructed and investigated a novel cadmium–tellurium quantum dot conjugated with doxorubicin and gambogic acid (DOX/GA-CdTe QDs) for cancer cell combined treatment in Raji, a Burkitt’s lymphoma cell line. Results showed that DOX/GA-CdTe QDs could significantly improve anti-tumor effects compared with drugs alone in the Raji cell line. Flow cytometry, transmission electron micrographs and overexpression of Beclin1 and LC3 II/I showed that apoptosis and autophagy were involved in the process. However, DOX/GA-CdTe QDs did not cause cell cycle arrest, whereas DOX alone or combined with GA could cause apparent G2/M phase arrest. Hence, the novel DOX/GA-CdTe QDs offer a promising approach of drug delivery into cancer cells.
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Xu, Juan, Huan He, Ying-Ying Wang, et al. "New aspects of the environmental risks of quantum dots: prophage activation." Environmental Science: Nano 5, no. 7 (2018): 1556–66. http://dx.doi.org/10.1039/c8en00142a.
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Kanagasabai, Lenin. "Amplified and quantum based brain storm optimization algorithms for real power loss reduction." International Journal of Applied Power Engineering 10, no. 1 (2021): 21~25. https://doi.org/10.11591/ijape.v10.i1.pp21-25.
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In this work amplified brain storm optimization (ABS) algorithm and quantum based brain storm (QBS) optimization algorithm is applied to solve the problem. A node is arbitrarily chosen from the graph as the preliminary point to form a Hamiltonian cycle. At generation t and t+1, Lt and Lt+1 are the length of Hamiltonian cycle correspondingly. In the QBS algorithm a Quantum state of an idea is illustrated by a wave function ( ⃗ ) as an alternative of the position modernized only in brain storm optimization algorithm. Monte Carlo simulation method is used, to measure the position for each idea from the quantum state to the traditional one. Proposed ABS algorithm and QBS optimization algorithm has been tested in standard IEEE 57 bus test system and real power loss reduced effectively.
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Rossi, Riccardo, Roberta Ruotolo, Giuseppe De Giorgio, et al. "Cadmium Sulfide Quantum Dots Adversely Affect Gametogenesis in Saccharomyces cerevisiae." Nanomaterials 12, no. 13 (2022): 2208. http://dx.doi.org/10.3390/nano12132208.
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In the last decades, nanotechnology-based tools have attracted attention in the scientific community, due to their potential applications in different areas from medicine to engineering, but several toxicological effects mediated by these advanced materials have been shown on the environment and human health. At present, the effects of engineered nanomaterials on gametogenesis have not yet been well understood. In the present study, we addressed this issue using the yeast Saccharomyces cerevisiae as a model eukaryote to evaluate the effects of cadmium sulfide quantum dots (CdS QDs) on sporulation, a process equivalent to gametogenesis in higher organisms. We have observed that CdS QDs cause a strong inhibition of spore development with the formation of aberrant, multinucleated cells. In line with these observations, treatment with CdS QDs down-regulates genes encoding crucial regulators of sporulation process, in particular, the transcription factor Ndt80 that coordinates different genes involved in progression through the meiosis and spore morphogenesis. Down-regulation of NDT80 mediated by CdS QDs causes a block of the meiotic cell cycle and a return to mitosis, leading to the formation of aberrant, multinucleated cells. These results indicate that CdS QDs inhibit gametogenesis in an irreversible manner, with adverse effects on cell-cycle progression.
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Kaiser, H. J., H. Kuehl, K. C. Koch, B. Nowak, U. Buell, and W. M. Schaefer. "Quantification of left ventricular volumes and ejection fraction from 16- and rebinned 8-frame gated 99mTc-tetrofosmin SPECT." Nuklearmedizin 46, no. 01 (2007): 22–28. http://dx.doi.org/10.1055/s-0037-1616622.
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Summary Aim: Using 8-frames/cardiac cycle with gated SPECT underestimates end-diastolic volumes (EDV) and ejection fractions (LVEF), and overestimates end-systolic volumes (ESV). However, using 16-frames/cardiac cycle significantly decreases the signal-to-noise-ratio. We analyzed 16-frames and rebinned 8-frame gated SPECT data using common 4D-MSPECT and QGS algorithms. Patients, methods: 120 patients were examined using gated SPECT on a Siemens Multispect 3 (triple-head gamma camera) 60 minutes after intravenous administration at rest of about 450 MBq (two-day protocol) or about 750 MBq (one-day protocol) 99mTc-tetrofosmin. Reoriented short axis slices (16-frames) were summed framewise (1+2,3+4, etc.) yielding 8-frame data sets. EDV, ESV and LVEF were calculated for both data sets using 4D-MSPECT and QGS. Results: QGS succeeded with 119, 4D-MSPECT with 117 patients. For the remaining 116 patients, higher EDV (+0.8ml/+3.8ml) and LVEF (+1.5%/+2.6%; absolute) and lower ESV (–1.7ml/–0.9ml) (4D-MSPECT/QGS) were found for 16-frame runs. Bland-Altman limits were smaller for QGS than 4D-MSPECT [EDV 32/12ml, ESV 21/10ml, LVEF 17/7% (4D-MSPECT/QGS)]. Conclusion: Both algorithms showed the expected effects. Contour finding using QGS failed with only one data set, whereas contour finding using 4D-MSPECT failed with three data sets. Since the effects observed between the 8– and the 16-frame studies are relatively small and quite predictable, 8-frame studies can be employed in clinical routine with hardly any loss at all, plus contour finding appears less susceptible to error.
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LAMBERTS, Jozef. "Life Cycle Rituals and Sacramentality." Questions Liturgiques/Studies in Liturgy 83, no. 1 (2002): 5–9. http://dx.doi.org/10.2143/ql.83.1.565696.
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Heesen, Philip, Gabriela Studer, Beata Bode, et al. "Quality of Sarcoma Care: Longitudinal Real-Time Assessment and Evidence Analytics of Quality Indicators." Cancers 15, no. 1 (2022): 47. http://dx.doi.org/10.3390/cancers15010047.
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Sarcomas represent a large group of rare to very rare diseases, requiring complex management with a transdisciplinary approach. Overall progress has been hampered because of discipline, institution and network fragmentation, and there is no global data harmonization or quality standards. To report on and improve quality, a common definition of quality indicators (QIs) of sarcoma care as well as the capacity to assess longitudinal real-time data is required. An international advisory board of world-renowned sarcoma experts defined six categories of QIs, totaling more than 80 quality indicators. An interoperable (web-based) digital platform was then created combining the management of the weekly sarcoma board meeting with the sarcoma registry and incorporating patient-reported outcome measures (PROMs) into the routine follow-up care to assess the entire care cycle of the patient. The QIs were then programmed into the digital platform for real-time analysis and visualization. The definition of standardized QIs covering all physician- (diagnostics and therapeutics), patient- (PROMS/PREMS), and cost-based aspects in combination with their real-time assessment over the entire sarcoma care cycle can be realized. Standardized QIs as well as their real-time assessment and data visualization are critical to improving the quality of sarcoma care. By enabling predictive modelling and introducing VBHC, precision health care for a complex disease is on the horizon.
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Gao, Ge, Qiaoyue Xi, Hua Zhou, et al. "Selectivity of quantum dot sensitized ZnO nanotube arrays for improved photocatalytic activity." Physical Chemistry Chemical Physics 19, no. 18 (2017): 11366–72. http://dx.doi.org/10.1039/c7cp01383c.
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QD-sensitized ZnO heterostructures with different kinds and cycles of QDs exhibit different photocatalytic activity and the selectivity of the best QDs sensitizing ZnO for high photocatalytic activity is realized.
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Lenin, Kanagasabai. "Amplified and quantum based brain storm optimization algorithms for real power loss reduction." International Journal of Applied Power Engineering (IJAPE) 10, no. 1 (2021): 21. http://dx.doi.org/10.11591/ijape.v10.i1.pp21-25.
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In this work Amplified Brain Storm Optimization (ABS) algorithm and Quantum based Brain Storm (QBS) Optimization Algorithm is used for solving optimal reactive power problem. In the projected amplified Brain storm optimization algorithm Hamiltonian cycle has been applied to improve the search abilities and also to avoid of trap in local optimal solution. A node is arbitrarily chosen from the graph as the preliminary point to form a Hamiltonian cycle. At generation t and t+1, L<sub>t</sub> and L<sub>t</sub><sub>+1</sub> are the length of Hamiltonian cycle correspondingly. In the QBS algorithm a Quantum state of an idea is illustrated by a wave function as an alternative of the position modernized only in Brain storm optimization algorithm. Monte Carlo simulation method<em> </em>is used, to measure the position for each idea from the<em> </em>quantum state to the traditional one. Proposed Amplified Brain Storm Optimization (ABS) algorithm and Quantum based Brain Storm (QBS) Optimization Algorithm has been tested in standard IEEE 57 bus test system and simulation results show the projected algorithms reduced the real power loss effectively.
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Shin, Hee Ju, Hyun Kyu Seo, Su Yeon Lee, Minsoo Park, Seong-Geon Park, and Min Kyu Yang. "Quad-Level Cell Switching with Excellent Reliability in TiN/AlOx:Ti/TaOx/TiN Memory Device." Materials 15, no. 7 (2022): 2402. http://dx.doi.org/10.3390/ma15072402.
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TiN/AlOx:Ti/TaOx/TiN memory devices using bilayer resistive switching memory demonstrated excellent durability and capability of QLC (quad-level cell) memory devices. The best nonvolatile memory characteristics with the lowest operation current and optimized 4 bit/cell states were obtained using the Incremental Step Pulse Programming (ISPP) algorithm in array. As a result, a superior QLC reliability (cycle endurance > 1 k at each level of the QLC, data retention > 2 h at 125 °C) for all the 4 bits/cell operations was achieved in sub-μm scaled RRAM (resistive random access memory) devices.
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Padmanaban, Dilli Babu, Ruairi McGlynn, PAUL Maguire, and Davide Mariotti. "A “Green” Reaction Cycle Pathway for Synthesizing Metal Oxide Quantum Dots." ECS Meeting Abstracts MA2023-01, no. 20 (2023): 1518. http://dx.doi.org/10.1149/ma2023-01201518mtgabs.
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Synthesis of highly stable quantum dots (QDs) is always a challenge for researchers in nanomaterial community because of involved complexities of the process time and steps. In the past few years, we have demonstrated a simple and single step synthesis process for a range of metal oxide (MO) QDs using plasma-induced non-equilibrium electrochemistry (PiNE).1 , 2 , 3 PiNE is a new and emerging technique based on electrochemical process taking place in liquids from plasma interaction.4 This method is rapid and produces highly stable QDs starting from a metal foil and ethanol as electrolyte. As MO QDs semiconductors in general are a promising candidate for energy harvesting application mainly from their nanoscale effects.5 , 6 In this work, we will present the general applicability of this method for a range of metal oxides and the provide more an in-depth case study for CuO QDs providing details of the reaction mechanisms. An extensive analysis of the solution along with the quantum dots was carried out with nuclear magnetic resonance (NMR) spectroscopy and gas chromatography-mass (GC-MS) spectroscopy, Fourier transform infra-red spectroscopy (FTIR) and ultraviolet-visible (UV-Vis) spectroscopy, pH and the plasma-ethanol interface using optical emission spectroscopy. Thus, the study discloses important aspects of plasma interactions with a non-aqueous medium particularly the trace products and QD purity shows the entire process is a ‘green’ synthesis cycle.7 Reference (1) Ni, C.; Carolan, D.; Rocks, C.; Hui, J.; Fang, Z.; Padmanaban, D. B.; Ni, J.; Xie, D.; Maguire, P.; Irvine, J. T. S.; Mariotti, D. Microplasma-Assisted Electrochemical Synthesis of Co 3 O 4 Nanoparticles in Absolute Ethanol for Energy Applications. Green Chem. 2018, 20 (9), 2101–2109. https://doi.org/10.1039/C8GC00200B. (2) Ni, C.; Carolan, D.; Hui, J.; Rocks, C.; Padmanaban, D.; Ni, J.; Xie, D.; Fang, Z.; Irvine, J.; Maguire, P.; Mariotti, D. Evolution of Anodic Product from Molybdenum Metal in Absolute Ethanol and Humidity Sensing under Ambient Conditions. Cryst. Growth Des. 2019, 19 (9), 5249–5257. https://doi.org/10.1021/acs.cgd.9b00646. (3) Chakrabarti, S.; Carolan, D.; Alessi, B.; Maguire, P.; Svrcek, V.; Mariotti, D. Microplasma-Synthesized Ultra-Small NiO Nanocrystals, a Ubiquitous Hole Transport Material. Nanoscale Adv. 2019. https://doi.org/10.1039/C9NA00299E. (4) Mariotti, D.; Patel, J.; Švrček, V.; Maguire, P. Plasma-Liquid Interactions at Atmospheric Pressure for Nanomaterials Synthesis and Surface Engineering. Plasma Process. Polym. 2012, 9 (11–12), 1074–1085. https://doi.org/10.1002/ppap.201200007. (5) Velusamy, T.; Liguori, A.; Macias-Montero, M.; Padmanaban, D. B.; Carolan, D.; Gherardi, M.; Colombo, V.; Maguire, P.; Svrcek, V.; Mariotti, D. Ultra-Small CuO Nanoparticles with Tailored Energy-Band Diagram Synthesized by a Hybrid Plasma-Liquid Process. Plasma Process. Polym. 2017, 14 (7), 1600224. https://doi.org/10.1002/ppap.201600224. (6) McGlynn, R.; Chakrabarti, S.; Alessi, B.; Moghaieb, H. S.; Maguire, P.; Singh, H.; Mariotti, D. Plasma-Induced Non-Equilibrium Electrochemistry Synthesis of Nanoparticles for Solar Thermal Energy Harvesting. Sol. Energy 2020, 203 (April), 37–45. https://doi.org/10.1016/j.solener.2020.04.004. (7) Padmanaban, D. B.; McGlynn, R.; Byrne, E.; Velusamy, T.; Swadźba-Kwaśny, M.; Maguire, P.; Mariotti, D. Understanding Plasma–Ethanol Non-Equilibrium Electrochemistry during the Synthesis of Metal Oxide Quantum Dots. Green Chem. 2021, 23 (11), 3983–3995. https://doi.org/10.1039/D0GC03291C.
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Xie, Cong, Yubin Zhao, Yuxiang Song, et al. "Effect of Hybrid SiO2 Shell on Electrochemical Properties of CdTe Quantum Dots Decorated Reduced Graphene Oxide (rGO)." Journal of Nanoscience and Nanotechnology 20, no. 10 (2020): 6334–43. http://dx.doi.org/10.1166/jnn.2020.18555.
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On the basis of maintaining the original characteristics of each component, the composite material obtains the properties that the single component does not have through the synergy between the components. It is of great significance to understand the synergy between the components for the development of the composite. First of all, we prepared different emitting CdTe quantum dots (QDs), and then fabricated CdTe QDs@reduced graphene oxide (rGO) composites by a simple ultrasonic method. It is found that the fluorescence of QDs quenched, the photocurrent significantly improved, but the growth rate different from each other because of the different QDs. Afterwards, on the basis of naked QDs, hybrid SiO2-coated QDs were fabricated by a two-step method. After that, hybrid SiO2-coated CdTe QDs@rGO composites were prepared by the same method. It is found that the existence of the hybrid SiO2 shell leads to the decrease of photocurrent of the composites before and after coating, but the specific capacitance significantly improved, and the cycle stability also better than the naked QDs. This research will make grapheme-based composites have broad application prospects in energy storage equipment.
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Khabibullin, R. A., S. S. Pushkarev, R. R. Galiev, et al. "Spectral Characteristics of Terahertz Quantum Cascade Lasers." Nano- i Mikrosistemnaya Tehnika 24, no. 2 (2022): 96–102. http://dx.doi.org/10.17587/nmst.24.96-102.
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Terahertz quantum cascade lasers (THz QCLs) are prospective radiation sources for high-resolution gas spectroscopy. A wide range of operating frequencies (from 1.2 to 5.4 THz), a narrow generation line (up to 10 kHz), the ability to operate on several radiative transitions (two-color lasers, generation of frequency combs) and other unique characteristics of THz QCLs make it possible to create a new generation of gas spectrometers for biomedical and environmental applications. The article discusses the possibilities of controlling the spectral characteristics of THz QCLs by changing the operating temperature and parameters of the injection current pulses: amplitude, duration, and repetition rate. For the first time, the study of energy transfer between longitudinal Fabry — Perot modes in THz QCLs with a change in the duty cycle of injection current pulses has been carried out.
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Cai, Dong, Lili Wang, La Li, et al. "Self-assembled CdS quantum dots in carbon nanotubes: induced polysulfide trapping and redox kinetics enhancement for improved lithium–sulfur battery performance." Journal of Materials Chemistry A 7, no. 2 (2019): 806–15. http://dx.doi.org/10.1039/c8ta09906e.
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Self-assembled CdS-QDs in carbon nanotubes are highly efficient cathode materials for lithium–sulfur batteries with improved rate performance and cycle life. The configuration suppresses polysulfide shuttling and enhances redox kinetics.
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BELHAJ, A., A. ELRHALAMI, N. E. FAHSSI, M. J. I. KHAN, E. H. SAIDI, and A. SEGUI. "BRANE REALIZATIONS OF QUANTUM HALL SOLITONS AND LIE ALGEBRAS." International Journal of Geometric Methods in Modern Physics 09, no. 03 (2012): 1250017. http://dx.doi.org/10.1142/s021988781250017x.
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Using quiver gauge theories in (1+2)-dimensions, we give brane realizations of a class of Quantum Hall Solitons (QHS) embedded in Type IIA superstring on the ALE spaces with exotic singularities. These systems are obtained by considering two sets of wrapped D4-branes on 2-spheres. The space-time on which the QHS live is identified with the world-volume of D4-branes wrapped on a collection of intersecting 2-spheres arranged as extended Dynkin diagrams of Lie algebras. The magnetic source is given by an extra orthogonal D4-brane wrapping a generic 2-cycle in the ALE spaces. It is shown as well that data on the representations of Lie algebras fix the filling factor of the QHS. In case of finite Dynkin diagrams, we recover results on QHS with integer and fractional filling factors known in the literature. In case of hyperbolic bilayer models, we obtain amongst others values of filling factors appearing in graphene literature.
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Shi, Xiudong, Chunzi Shi, Wen Ye, et al. "Targeted Fluorescence Imaging and Biological Effects of Peptide Conjugated Quantum Dots on Pancreatic Cancer Cells." Journal of Nanoscience and Nanotechnology 20, no. 3 (2020): 1351–57. http://dx.doi.org/10.1166/jnn.2020.16949.
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Arginine-glycine-aspartic acid (RGD) peptide sequences exist in a variety of biological extracellular matrices and can specifically bind the cell-surface integrin αvβ3, which is overexpressed in cancer cells and plays important roles in tumor growth and invasion. Quantum dots (QDs) have been applied in the field of cell biology and can be physically conjugated to the surface of cancer cells for imaging. In this research, we developed QDs-RGD nanoparticles and investigated its application in pancreatic cancer cell imaging and its influence on the biological behavior of pancreatic cancer cells. The results of flow cytometric analysis showed that the αvβ3 receptor was markedly overexpressed on pancreatic cancer cells. In cellular uptake studies, the fluorescence signal of QDs-RGD nanoparticles in pancreatic cancer cells was higher than that of QDs without RGD conjugation, as determined by an inverted fluorescence microscope. Furthermore, the biological behavior of pancreatic cancer cells was affected by QDs-RGD nanoparticles, which inhibited proliferation, migration and invasion and induced G2-phase cell cycle arrest. With integrin αvβ3 as a target, QDs-RGD nanoparticles can generate high-quality images of pancreatic cancer cells and have immense potential for use in the targeted diagnosis and therapy of pancreatic cancer.
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Doronin, Dimitry, Shen Lei, and Shan SYED HAMAD HASSAN. "Mediation Effect of Knowledge Sharing Quality on Employee Creativity." International Business Research 15, no. 2 (2022): 75. http://dx.doi.org/10.5539/ibr.v15n2p75.
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Employee creativity requires knowledge sharing, according to many experts. What aspects of the knowledge sharing cycle encourage employee creativity? In this study, authors examined three factors, i.e., &lsquo;opportunity for exchange (OFE), value anticipation (VA), and motivation to engage (MTE)&rsquo;, that influence the production of intellectual capital (as antecedents) and its effects on employee creativity (as outcomes) through knowledge sharing (KS) and quality of knowledge sharing (QKS: as mediating mechanism). To test the hypothesized relationships, Mplus was used to analyze 371 Russian IT employees. The findings suggest that OFE, VA and MTE are important antecedents of both KS and QKS. Moreover, KS and QKS mediates the relationship between antecedents (OFE, VA and MTE) and outcome variable (employee creativity). Theoretical contribution and future research are discussed.
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Le, Nhi, Jonathan Routh, Cameron Kirk, et al. "Red CdSe/ZnS QDs’ Intracellular Trafficking and Its Impact on Yeast Polarization and Actin Filament." Cells 12, no. 3 (2023): 484. http://dx.doi.org/10.3390/cells12030484.
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Quantum dots are nanoparticles (2–10 nm) that emit strong and tunable fluorescence. Quantum dots have been heavily used in high-demand commercialized products, research, and for medical purposes. Emerging concerns have demonstrated the negative impact of quantum dots on living cells; however, the intracellular trafficking of QDs in yeast cells and the effect of this interaction remains unclear. The primary goal of our research is to investigate the trafficking path of red cadmium selenide zinc sulfide quantum dots (CdSe/ZnS QDs) in Saccharomyces cerevisiae and the impact QDs have on yeast cellular dynamics. Using cells with GFP-tagged reference organelle markers and confocal microscopy, we were able to track the internalization of QDs. We found that QDs initially aggregate at the exterior of yeast cells, enter the cell using clathrin-receptor-mediated endocytosis, and distribute at the late Golgi/trans-Golgi network. We also found that the treatment of red CdSe/ZnS QDs resulted in growth rate reduction and loss of polarized growth in yeast cells. Our RNA sequence analysis revealed many altered genes. Particularly, we found an upregulation of DID2, which has previously been associated with cell cycle arrest when overexpressed, and a downregulation of APS2, a gene that codes for a subunit of AP2 protein important for the recruitment of proteins to clathrin-mediated endocytosis vesicle. Furthermore, CdSe/ZnS QDs treatment resulted in a slightly delayed endocytosis and altered the actin dynamics in yeast cells. We found that QDs caused an increased level of F-actin and a significant reduction in profilin protein expression. In addition, there was a significant elevation in the amount of coronin protein expressed, while the level of cofilin was unchanged. Altogether, this suggests that QDs favor the assembly of actin filaments. Overall, this study provides a novel toxicity mechanism of red CdSe/ZnS QDs on yeast actin dynamics and cellular processes, including endocytosis.
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M.Pd, Gufran Gufran, and Siti Aminah. "Peningkatan Peningkatan Prestasi Belajar PAI dan Budi Pekerti Siswa Kelas X TKJ SMKN 2 Kota Bima Pada Pokok Bahasan Hukum Bacaan Q.S Al-Hujurat Ayat 11-12 Melalui Penerapan Model Pembelajaran Kooperatif Tipe Make a Match Tahun Pelajaran 2018/2019." PEDAGOGOS ( JURNAL PENDIDIKAN ) 2, no. 2 (2020): 30–41. http://dx.doi.org/10.33627/gg.v2i2.369.
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This research is a class action research (Class Room Action Research) which is planned in several cycles and carried out in two cycles. The subjects of this study were students of class X TKJ SMKN 2 Bima City with a total of 36 students. Implementation in each cycle consists of planning, implementing actions, observation, evaluation and reflection. This research with the formulation of the problem is whether there is an increase in learning achievement of Islamic education and character of class X TKJ SMKN 2 Bima City on the subject of reading law QS Al-Hujurat Verses 11-12 through the application of the cooperative learning model make a match in the 2018/2019 academic year .The purpose of this study was to determine the Improvement of PAI Learning Achievement and Characteristics of Class X TKJ SMKN 2 Bima City Students on the Subject of Q.S Al-Hujurat Verses 11-12 through the application of the Make a Match type of cooperative learning model for the 2018/2019 academic year. Data collection techniques used in this study are: (1) data about the learning process activities are collected using observation sheets. (2) Student learning outcomes are collected by giving evaluation tests or tests to students at the end of each cycle. Learning conditions are said to be complete if 85% of class X TKJ students score> 75 on the final test of each cycle and student learning activities are at least in the active or good category according to predetermined score standards.The results obtained are as follows: Cycle I; The average value of student learning outcomes is 74.43 with a percentage of learning completeness of 63.88%, and student activity at the first and second meetings is 60% which belongs to the active category. And there was an increase in Cycle II; the average value of learning outcomes increased to 81.96 with the percentage of completeness of learning 94.44% and student learning activities 95% were in the very active category. These results indicate that the established research indicators have been achieved, so it can be concluded that there is an increase in the learning achievement of Islamic education and character of class X TKJ SMKN 2 Bima City on the subject of the Law of Reading QS Al-Hujurat Verses 11-12 through the application of the Make Type Cooperative Learning Model. a Make the 2018/2019 Academic Year.
 
 Penelitian ini merupakan penelitian tindakan kelas (Class Room Action Research) yang direcanakan dalam beberapa siklus dan dilaksanakan dalam dua siklus. Subyek penelitian ini adalah siswa kelas X TKJ SMKN 2 Kota Bima dengan jumlah Siswa 36 orang. Pelaksanaan dalam tiap siklus terdiri dari perencanaan, pelaksanaan tindakan, observasi, evaluasi dan refleksi. Penelitian ini dengan rumusan masalah adalah Apakah ada Peningkatan Prestasi Belajar PAI dan Budi Pekerti Siswa Kelas X TKJ SMKN 2 Kota Bima Pada Pokok Bahasan Hukum Bacaan Q.S Al-Hujurat Ayat 11-12 melalui Penerapan Model Pembelajaran Kooperatif Tipe Make a Match tahun pelajaran 2018/2019.
 Tujuan dari penelitian ini adalah untuk mengetahui Peningkatan Prestasi Belajar PAI dan Budi Pekerti Siswa Kelas X TKJ SMKN 2 Kota Bima Pada Pokok Bahasan Hukum Bacaan Q.S Al-Hujurat Ayat 11-12 melalui penerapan model pembelajaran kooperatif Tipe Make a Match tahun pelajaran 2018/2019. Teknik pengumpulan data yang dilakukan dalam penelitian ini adalah: (1) data tentang kegiatan proses pembelajaran dikumpulkan dengan menggunakan lembar observasi. (2) Hasil belajar Siswa dikumpulkan dengan memberikan tes evaluasi atau ulangan pada siswa setiap akhir siklus. Ketentuan belajar dikatakan tuntas jika ³ 85% siswa kelas X TKJ mendapat nilai > 75 pada tes akhir tiap siklus dan aktivitas belajar siswa minimal berkategori aktif atau baik sesuai dengan standar skor yang telah ditentukan.
 Hasil penelitian yang didapat adalah sebagai berikut: Siklus I; nilai rata-rata hasil belajar siswa 74,43 dengan persentase ketuntasan belajarnya sebesar 63,88%, dan aktivitas siswa pada pertemuan pertama dan kedua adalah sebesar 60% yang tergolong pada kategori aktif. Dan terjadi peningkatan pada Siklus II; nilai rata-rata hasil belajar naik menjadi 81,96 dengan persentase ketuntasan belajarnya 94,44% dan aktivitas belajar siswa 95% berada pada kategori sangat aktif. Hasil tersebut menunjukkan sudah tercapainya indikator penelitian yang ditetapkan, sehingga dapat disimpulkan bahwa Ada Peningkatan Prestasi Belajar PAI dan Budi Pekerti Siswa Kelas X TKJ SMKN 2 Kota Bima Pada Pokok Bahasan Hukum Bacaan Q.S Al-Hujurat Ayat 11-12 Melalui Penerapan Model Pembelajaran Kooperatif Tipe Make a Make Tahun Pelajaran 2018/2019
 .
 
 Kata kunci: Pembelajaran Kooperatif Make a Match dan Prestasi belajar.
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Conner, Ava E., Veronica Gordillo-Herrejon, Sonia C. Francone, et al. "Limiting the Growth of Water-Soluble, Monolayer-Protected Quantum Dots." International Journal of Analytical Chemistry 2018 (July 2, 2018): 1–6. http://dx.doi.org/10.1155/2018/3164347.
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The growth and solubility of quantum dots (QDs) are important factors that must be examined before these nanoparticles are incorporated into a variety of potential applications. In this work, monolayer-protected CdSe QDs surrounded by water-soluble thiols were prepared using various cadmium salts. The use of a variety of cadmium salts did not have a significant impact on the spectral properties of the CdSe QDs. CdSe QDs were synthesized at rather low temperatures (< 0°C), resulting in slow nanoparticle growth upon subsequent heating of the reaction mixture. The effect of multiple drying and redissolving cycles of the QD samples was examined. The effect of heating temperature on QD growth was studied, with more rapid nanoparticle growth associated with higher temperatures. The results show that QDs can be synthesized at low temperatures and their subsequent growth can be controlled during the heating process.
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Aldughaim, Mohammed S., Mashael R. Al-Anazi, Marie Fe F. Bohol, et al. "Gene Expression and Transcriptome Profiling of Changes in a Cancer Cell Line Post-Exposure to Cadmium Telluride Quantum Dots: Possible Implications in Oncogenesis." Dose-Response 19, no. 2 (2021): 155932582110198. http://dx.doi.org/10.1177/15593258211019880.
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Cadmium telluride quantum dots (CdTe-QDs) are acquiring great interest in terms of their applications in biomedical sciences. Despite earlier sporadic studies on possible oncogenic roles and anticancer properties of CdTe-QDs, there is limited information regarding the oncogenic potential of CdTe-QDs in cancer progression. Here, we investigated the oncogenic effects of CdTe-QDs on the gene expression profiles of Chang cancer cells. Chang cancer cells were treated with 2 different doses of CdTe-QDs (10 and 25 μg/ml) at different time intervals (6, 12, and 24 h). Functional annotations helped identify the gene expression profile in terms of its biological process, canonical pathways, and gene interaction networks activated. It was found that the gene expression profiles varied in a time and dose-dependent manner. Validation of transcriptional changes of several genes through quantitative PCR showed that several genes upregulated by CdTe-QD exposure were somewhat linked with oncogenesis. CdTe-QD-triggered functional pathways that appear to associate with gene expression, cell proliferation, migration, adhesion, cell-cycle progression, signal transduction, and metabolism. Overall, CdTe-QD exposure led to changes in the gene expression profiles of the Chang cancer cells, highlighting that this nanoparticle can further drive oncogenesis and cancer progression, a finding that indicates the merit of immediate in vivo investigation.
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IMAI, K. "Frames a cardiac cycle in quantitative gated SPECT (QGS) for clinical use: 8 versus 16." Journal of Nuclear Cardiology 6, no. 1 (1999): S17. http://dx.doi.org/10.1016/s1071-3581(99)90181-2.
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Zou, Xiaoping, and Zhe Sun. "Enhanced Performance of DSSCs Based on the Insertion Energy Level of CdS Quantum Dots." Journal of Chemistry 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/219704.
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Cadmium sulfide (CdS) quantum dots (QDs) are assembled onto the TiO2films by chemical bath deposition method (CBD). And the QDs size is controlled by the times of CBD cycles. They are characterized by UV-visible absorption. To avoid the photo corrosion and electrolyte corrosion, CdS and N719 are sequentially assembled onto the nanocrystalline TiO2films to prepare a CdS/N719 cosensitized photo electrode for the dye-sensitized solar cells. In the structure of TiO2/CdS/N719 electrode, the reorganization of energy levels between CdS and N719 forms a stepwise structure of band-edge levels which is advantageous to the electron injection and hole recovery of CdS and N719 QDs. The open circuit voltage (Voc), short circuit current density (Jsc), and efficiency are increased.
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Serizawa, Takahiro, Takako Terui, Tatsuya Kagemoto, et al. "Real-time measurement of the length of a single sarcomere in rat ventricular myocytes: a novel analysis with quantum dots." American Journal of Physiology-Cell Physiology 301, no. 5 (2011): C1116—C1127. http://dx.doi.org/10.1152/ajpcell.00161.2011.
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As the dynamic properties of cardiac sarcomeres are markedly changed in response to a length change of even ∼0.1 μm, it is imperative to quantitatively measure sarcomere length (SL). Here we show a novel system using quantum dots (QDs) that enables a real-time measurement of the length of a single sarcomere in cardiomyocytes. First, QDs were conjugated with anti-α-actinin antibody and applied to the sarcomeric Z disks in isolated skinned cardiomyocytes of the rat. At partial activation, spontaneous sarcomeric oscillations (SPOC) occurred, and QDs provided a quantitative measurement of the length of a single sarcomere over the broad range (i.e., from ∼1.7 to ∼2.3 μm). It was found that the SPOC amplitude was inversely related to SL, but the period showed no correlation with SL. We then treated intact cardiomyocytes with the mixture of the antibody-QDs and FuGENE HD, and visualized the movement of the Z lines/T tubules. At a low frequency of 1 Hz, the cycle of the motion of a single sarcomere consisted of fast shortening followed by slow relengthening. However, an increase in stimulation frequency to 3–5 Hz caused a phase shift of shortening and relengthening due to acceleration of relengthening, and the waveform became similar to that observed during SPOC. Finally, the anti-α-actinin antibody-QDs were transfected from the surface of the beating heart in vivo. The striated patterns with ∼1.96-μm intervals were observed after perfusion under fluorescence microscopy, and an electron microscopic observation confirmed the presence of QDs in and around the T tubules and Z disks, but primarily in the T tubules, within the first layer of cardiomyocytes of the left ventricular wall. Therefore, QDs are a useful tool to quantitatively analyze the movement of single sarcomeres in cardiomyocytes, under various experimental settings.
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HU, Yu-CHI, Ziran You, Ji-Wei Ci, et al. "Camphor-Based CVD Graphene Integrating CsPbBr3 Quantum Dots for High-Temperature Endurance, High Flexibility, and Fast Optical Switch Photodetection." ECS Meeting Abstracts MA2024-01, no. 23 (2024): 1394. http://dx.doi.org/10.1149/ma2024-01231394mtgabs.
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Photodetectors (PDs) based on camphor-based CVD graphene integrating CsPbBr3 quantum dots (QDs) have been fabricated on mica substrates successfully, showing temperature resistant, foldable, and fast response properties. The graphene synthesized from eco-friendly camphor was transferred onto mica substrates, and then the CsPbBr3 QDs were coated onto the graphene surface to form CsPbBr3 QDs/graphene composition on a flexible mica substrate. According to the Raman spectrum, the structure of camphor-based CVD graphene is multilayer. The photoresponse of CsPbBr3 QDs/graphene composition was revealed by temperature-dependent (ranging from 300 K to 523 K) I-V measurements with/without white light illumination (light intensity: 112 mW/cm2). To highlight the temperature resistance of PDs based on CsPbBr3 QDs/graphene composition, a photo-to-dark current ratio (PDCR) of at 5 V is estimated at different temperatures. The PDCR of the CsPbBr3 QDs/graphene composition-based PD decreased from 3.2 to 0.74 with increasing temperature from 300 K to 523 K. Moreover, after 0 to 300 bending cycles, the vibration of PDCR value at 5 V is small (from 4.3 to 3.7), showing the high flexibility of the CsPbBr3 QDs/graphene composition-based PD. Furthermore, we found that the rise and fall times of the CsPbBr3 QDs/graphene composition-based PDs when we switched the illumination source ON and OFF are ~ 2 and ~1 ms, respectively, indicating fast optical switch behavior. In this study, camphor-based CVD graphene incorporating CsPbBr3 QDs composition-based PD is demonstrated to exhibit high-temperature resistance, high flexibility, and fast response photodetection. Keywords: Camphor, graphene, CsPbBr3 quantum dots, flexible photodetectors
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Ernalita. "Improving the Learning Achievement of Islamic Education on Q.S. At-Tin Material with the Drill Method at SD Negeri 21 Petok." DARUSSALAM: Scientific Journal of Islamic Education 1, no. 2 (2024): 126–32. https://doi.org/10.62945/darussalam.v1i2.246.
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This study aims to improve student learning outcomes in Islamic religious education learning by using the drill learning method. This study is a classroom action research that uses four steps, namely planning, action, observation and reflection. The subjects of this study were elementary school students. The data for this study were obtained by test and observation techniques. Tests are used to measure learning outcomes and observations are used to analyze teacher and student learning activities. The data analysis technique used in this study is descriptive statistics by comparing the results obtained with indicators of research success. The results of the study indicate that the drill learning method can improve student learning outcomes in Islamic religious education learning. This can be seen from the increase in the percentage of student learning completion in each cycle with details of the pre-cycle 41.31%, the first cycle 67.39% and in the second cycle it increased to 90.63%. Thus, the use of the drill learning method can be used as an alternative to improve student learning outcomes in Islamic religious education learning.
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Seo, Joo-Won, Seung-Beom Ha, In-Cheul Song, and Jae-Yup Kim. "PbS Quantum Dots-Decorated BiVO4 Photoanodes for Highly Efficient Photoelectrochemical Hydrogen Production." Nanomaterials 13, no. 5 (2023): 799. http://dx.doi.org/10.3390/nano13050799.
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While metal oxides such as TiO2, Fe2O3, WO3, and BiVO4 have been previously studied for their potential as photoanodes in photoelectrochemical (PEC) hydrogen production, their relatively wide band-gap limits their photocurrent, making them unsuitable for the efficient utilization of incident visible light. To overcome this limitation, we propose a new approach for highly efficient PEC hydrogen production based on a novel photoanode composed of BiVO4/PbS quantum dots (QDs). Crystallized monoclinic BiVO4 films were prepared via a typical electrodeposition process, followed by the deposition of PbS QDs using a successive ionic layer adsorption and reaction (SILAR) method to form a p-n heterojunction. This is the first time that narrow band-gap QDs were applied to sensitize a BiVO4 photoelectrode. The PbS QDs were uniformly coated on the surface of nanoporous BiVO4, and their optical band-gap was reduced by increasing the number of SILAR cycles. However, this did not affect the crystal structure and optical properties of the BiVO4. By decorating the surface of BiVO4 with PbS QDs, the photocurrent was increased from 2.92 to 4.88 mA/cm2 (at 1.23 VRHE) for PEC hydrogen production, resulting from the enhanced light-harvesting capability arising from the narrow band-gap of the PbS QDs. Moreover, the introduction of a ZnS overlayer on the BiVO4/PbS QDs further improved the photocurrent to 5.19 mA/cm2, attributed to the reduction in interfacial charge recombination.
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Utzig, Martin, Hans Hoffmann, Niels Reinmuth, et al. "Development and Update of Guideline-based Quality Indicators in Lung Cancer." TumorDiagnostik & Therapie 45, no. 07 (2024): 472–83. http://dx.doi.org/10.1055/a-2366-7219.
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Abstract Background In 2022, an update of the German lung cancer guideline, first published in 2010 and revised in 2018, was released. This article aims to show the process of updating, developing, and implementing guideline-based quality indicators (QI) into the certification system for lung cancer centers (LCC). Methods A multidisciplinary and interprofessional working group revised the guideline QIs from 2018 using the strong recommendations of the guideline update, a systematic review for QIs, and the results of the implemented QIs from LCC. Results For 4 out of 8 indicators from the 2018 guideline, the LCC showed an improved implementation of the requirements in the last 3 years (2018–2020). For 3 indicators, the median of the results was constant at a very high level (≥96% or 100%). Only the “adjuvant cisplatin-based chemotherapy” indicator showed declining values between 2018 and 2020. The target values and plausibility limits were well achieved by LCC. After updating the guideline, one QI from 2018 was not included in the new QI set due to the small denominator population. Based on the new strong recommendations, 8 new QIs were defined. From the QI set of the guideline update, 13 of 15 indicators (7 since 2018 and 6 from 2022 on) were adopted into the certification program. Conclusions The guideline recommendations are implemented by LCC at a high level. The process presented confirms the successful implementation of the so-called quality cycle in oncology. The QIs developed by the German Guideline Program in Oncology (GGPO) are adopted by the certification program. The implementation of the QI is measured in LCC, evaluated by the German Cancer Society (DKG), and reflected back to the GGPO. The “real world” data have led to the deletion of one QI and show a high implementation of most QIs in LCC.
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Głowacka, Justyna, Natalia Tekiela, Natalie Papachristoforou, et al. "Lipedema: diagnosis, treatment and the vicious cycle - a review of the literature." Quality in Sport 38 (February 5, 2025): 57746. https://doi.org/10.12775/qs.2025.38.57746.
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Introduction Lipedema is a chronic condition that affects the majority of women. It involves swelling in fatty parts of the body such as the buttocks, hips, thighs and calves. It usually develops during a period of hormonal changes (puberty, pregnancy or menopause) and is often confused with lymphoedema or obesity, leading to a delay in correct diagnosis and the introduction of effective treatment. Fat oedema is estimated to affect 1 in 72,000 people. However, these figures, according to many sources, are much underestimated compared to the actual occurrence of the condition due to misdiagnosis. [1] Purpose of Research The aim of this work is to commonize the knowledge around the problem of lipedema, presenting the current diagnosis and treatment. State of knowledge Lipaemia is a chronic disease characterised by the development of fatty oedema in the lower extremities (in some cases also in the upper extremities), which is resistant to exercise. The pathogenesis of the disease is unclear and diagnosis and treatment still require much research. Review Methods The literature review was based on the most recent studies. PubMed and Google Scholar open databases were used in the research. The focus was put on literature published between 2013 and 2024. Summary Lipedema hinders women's physical, psychological and social functioning. Current diagnosis and treatment is not sufficient to be certain of an accurate diagnosis and to apply appropriate treatment. However, knowledge about this disease is becoming more publicised, through media, among other means, and research is being conducted at a larger scale.
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Liang, Ruowen, Zhoujun He, Chen Zhou, Guiyang Yan, and Ling Wu. "MOF-Derived Porous Fe2O3 Nanoparticles Coupled with CdS Quantum Dots for Degradation of Bisphenol A under Visible Light Irradiation." Nanomaterials 10, no. 9 (2020): 1701. http://dx.doi.org/10.3390/nano10091701.
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In this work, CdS quantum dots (QDs) were planted on magnetically recyclable porous Fe2O3 (denoted as F450) to obtain CdS QDs/porous Fe2O3 hybrids (denoted as X–CdS/F450, in which X is the immersion times of CdS QDs). Porous Fe2O3 was first obtained by pyrolysis from an iron-containing metal–organic framework by a two-step calcination method. Next, CdS QDs (of average size 3.0 nm) were uniformly and closely attached to the porous F450 via a sequential chemical-bath deposition strategy. As expected, the X–CdS/F450 hybrids serve as high-performance photocatalysts for the degradation of bisphenol A, a typical endocrine-disrupting chemical. Almost ∼100% of the bisphenol A was degraded over 5-CdS/F450 after visible light irradiation for 30 min (λ ≥ 420 nm). In comparison, the degradation efficiency of pure F450 powder is 59.2%. The high performance of 5-CdS/F450 may be ascribable to the fast electron transport of porous F450, the intense visible-light absorption of the CdS QDs and the matched energy levels between CdS and F450. More significantly, through the photocatalytic degradation reaction, the X–CdS/F450 hybrids can easily be recovered magnetically and reused in subsequent cycles, indicating their stability and recyclability.
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Patel, Jyoti, Ajaya K. Singh, and Sónia A. C. Carabineiro. "Assessing the Photocatalytic Degradation of Fluoroquinolone Norfloxacin by Mn:ZnS Quantum Dots: Kinetic Study, Degradation Pathway and Influencing Factors." Nanomaterials 10, no. 5 (2020): 964. http://dx.doi.org/10.3390/nano10050964.
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Norfloxacin (NOFX), a broadly used fluoroquinolone antibiotic, has been a subject of great concern in the past few years due to its undesirable effect on human beings and aquatic ecosystems. In this study, novel Mn doped ZnS (Mn:ZnS) quantum dots (QDs) were prepared through a facile chemical precipitation method and used as photocatalysts for NOFX degradation. Prior to photodegradation experiments, morphological and optical parameters of the QDs were examined through transmission electron microscopy, scanning electron microscopy, energy dispersive X-ray analysis, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, fluorescence spectroscopy, Brunauer–Emmett–Teller analysis, and differential thermal and thermogravimetric analyses. Mn:ZnS QDs exhibited excellent properties of photodegradation, not only under UV irradiation but also in sunlight, which induced NOFX to photodegrade. The utmost photodegradation efficiency was obtained under optimal conditions (25 mL of NOFX, 15 mg/L, pH 10, 60 min UV irradiation, 60 mgs QDs), adopting first order kinetics. In addition, hydroxyl radicals produced by the conduction band electrons were found to be the primary reason dominating the transformation of NOFX in basic conditions, while holes, oxygen atoms, as well as the doped metal (Mn) enhanced the degradation. The QDs showed excellent reusability and stability in four repeated cycles. Finally, four different pathways were predicted, derived from the identified intermediates, with piperazinyl ring transformation being the primary one. It is expected that the synthesized Mn:ZnS QDs could be utilized as efficient photocatalytic materials for energy conversion and ecological remediation.
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Sripetthong, Sasikarn, Sirinporn Nalinbenjapun, Abdul Basit, Suvimol Surassmo, Warayuth Sajomsang, and Chitchamai Ovatlarnporn. "Preparation of Self-Assembled, Curcumin-Loaded Nano-Micelles Using Quarternized Chitosan–Vanillin Imine (QCS-Vani Imine) Conjugate and Evaluation of Synergistic Anticancer Effect with Cisplatin." Journal of Functional Biomaterials 14, no. 10 (2023): 525. http://dx.doi.org/10.3390/jfb14100525.
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Nano-micelles are self-assembling colloidal dispersions applied to enhance the anticancer efficacy of chemotherapeutic agents. In this study, the conjugate of quarternized chitosan and vanillin imine (QCS-Vani imine) was synthesized using the reaction of a Schiff base characterized by proton-NMR (1HNMR), UV-Vis spectroscopy, and FT-IR. The critical micelle concentration (CMC), particle size, and zeta potential of the resulting product were determined. The QCS-Vani imine conjugate was used as a carrier for the development of curcumin-loaded nano-micelles, and their entrapment efficiency (%EE), drug-loading capacity (%LC) and in vitro release were investigated using HPLC analysis. Moreover, the nano-micelles containing curcumin were combined with various concentrations of cisplatin and evaluated for a possible anticancer synergistic effect. The anticancer activity was evaluated against lung cancer A549 and mouse fibroblast L929 cell lines. The percent yield (%) of the QCS-Vani imine conjugate was 93.18%. The curcumin-loaded QCS-Vani imine nano-micelles were characterized and found to have a spherical shape (by TEM) with size < 200 nm (by DLS) with high %EE up to 67.61% and %LC up to 6.15 ± 0.41%. The loaded lyophilized powder of the nano-micelles was more stable at 4 °C than at room temperature during 120 days of storage. pH-sensitive release properties were observed to have a higher curcumin release at pH 5.5 (cancer environment) than at pH 7.4 (systemic environment). Curcumin-loaded QCS-Vani imine nano-micelles showed higher cytotoxicity and selectivity toward lung cancer A549 cell lines and exhibited lower toxicity toward the normal cell (H9C2) than pure curcumin. Moreover, the curcumin-loaded QCS-Vani imine nano-micelles exhibited an enhanced property of inducing cell cycle arrest during the S-phase against A549 cells and showed prominently induced apoptosis in lung cancer cells compared to that with curcumin. The co-treatment of cisplatin with curcumin-loaded QCS-Vani imine nano-micelles presented an enhanced anticancer effect, showing 8.66 ± 0.88 μM as the IC50 value, in comparison to the treatment with cisplatin alone (14.22 ± 1.01 μM). These findings suggest that the developed QCS-Vani imine nano-micelle is a potential drug delivery system and could be a promising approach for treating lung cancer in combination with cisplatin.
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Surowiecki, Artur, and Mateusz Taszarek. "A 10-Year Radar-Based Climatology of Mesoscale Convective System Archetypes and Derechos in Poland." Monthly Weather Review 148, no. 8 (2020): 3471–88. http://dx.doi.org/10.1175/mwr-d-19-0412.1.
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Abstract In this study, a 10-yr (2008–17) radar-based mesoscale convective system (MCS) and derecho climatology for Poland is presented. This is one of the first attempts of a European country to investigate morphological and precipitation archetypes of MCSs as prior studies were mostly based on satellite data. Despite its ubiquity and significance for society, economy, agriculture, and water availability, little is known about the climatological aspects of MCSs over central Europe. Our results indicate that MCSs are not rare in Poland as an annual mean of 77 MCSs and 49 days with MCS can be depicted for Poland. Their lifetime ranges typically from 3 to 6 h, with initiation time around the afternoon hours (1200–1400 UTC) and dissipation stage in the evening (1900–2000 UTC). The most frequent morphological type of MCSs is a broken line (58% of cases), then areal/cluster (25%), and then quasi-linear convective systems (QLCS; 17%), which are usually associated with a bow echo (72% of QLCS). QLCS are the feature with the longest life cycle. Among precipitation archetypes of linear MCSs, trailing stratiform (73%) and parallel stratiform (25%) are the most common. MCSs are usually observed from April to September, with a peak in mid-July. A majority of MCSs travels from the west, southwest, and south sectors. A total of 16 derecho events were identified (1.5% of all MCS and 9.1% of all QLCS); the majority of them were produced by a warm-season QLCS, whereas only 4 were produced by cold-season narrow cold-frontal rainbands. Warm-season derechos produced a bigger impact than did cold-season events, even though their damage paths were shorter.
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Guan, Yingxiang, Xiaoping Zou, and Sheng He. "Effect of CdS/Mg-Doped CdSe Cosensitized Photoanode on Quantum Dot Solar Cells." Journal of Nanomaterials 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/673135.
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Quantum dots have emerged as a material platform for low-cost high-performance sensitized solar cells. And doping is an effective method to improve the performance of quantum dot sensitized solar cells (QDSSCs). Since Kwak et al. from South Korea proved the incorporation of Mg in the CdSe quantum dots (QDs) in 2007, the Mg-doped CdSe QDs have been thoroughly studied. Here we report a new attempt on CdS/Mg-doped CdSe quantum dot cosensitized solar cells (QDCSSC). We analyzed the performance of CdS/Mg-doped CdSe quantum dot cosensitized solar cells via discussing the different doping concentration of Mg and the different SILAR cycles of CdS. And we studied the mechanism of CdS/Mg-doped CdSe QDs in detail for the reason why the energy conversion efficiency had been promoted. It is a significant instruction on the development of Mg-doped CdSe quantum dot sensitized solar cells (QDSSCs).
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Sun, Yongqiang, Guangzhou Cui, Kai Guo, et al. "Quantum cascade lasers grown by MOCVD." Journal of Semiconductors 44, no. 12 (2023): 121901. http://dx.doi.org/10.1088/1674-4926/44/12/121901.
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Abstract Sharing the advantages of high optical power, high efficiency and design flexibility in a compact size, quantum cascade lasers (QCLs) are excellent mid-to-far infrared laser sources for gas sensing, infrared spectroscopic, medical diagnosis, and defense applications. Metalorganic chemical vapor deposition (MOCVD) is an important technology for growing high quality semiconductor materials, and has achieved great success in the semiconductor industry due to its advantages of high efficiency, short maintenance cycles, and high stability and repeatability. The utilization of MOCVD for the growth of QCL materials holds a significant meaning for promoting the large batch production and industrial application of QCL devices. This review summarizes the recent progress of QCLs grown by MOCVD. Material quality and the structure design together determine the device performance. Research progress on the performance improvement of MOCVD-grown QCLs based on the optimization of material quality and active region structure are mainly reviewed.
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Farikhah, Farikhah. "MENINGKATKAN KETERAMPILAN MEMBACA AL-QUR’AN MELALUI METODE TALAQQI PADA AYAT 190-191 DAN 159 Q.S. ALI IMRAN." Atthiflah: Journal of Early Childhood Islamic Education 8, no. 1 (2021): 86–98. http://dx.doi.org/10.54069/atthiflah.v8i1.194.
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As Muslims we have an obligation to pay attention to the Qur'an, namely by always reading it, memorizing it or interpreting it. Allah (SWT) has promised the preservationists of His book in the form of reward, raised and given happiness both in the world and in the Hereafter. The problem that I found when teaching online (online) on the material aspects of the Qur'an, it turns out that many students who collect the bill of reading QS assignments. Ali Imran verses 190-191 and 159 many reading errors. Therefore, it can be found that the methods used previously do not improve the ability to read the Qur'an in accordance with the rules of the law of reading or tajwid. Then it is necessary to apply some alternative solutions that are needed, namely: the right method that can improve the skills of reading the Qur'an according to tajwid rules and media that can facilitate improving the skills of reading the Qur'an according to tajwid rules. The talaqqi method makes it easier for researchers to choose the right way to convey knowledge, because of the direct interaction between teachers and students, making it easier for teachers to recognize students' personalities and abilities by using zoomeeting applications. In this study the method used is Class Action Research. The essence of the nature carried out in classroom action research (PTK) is in the framework of teachers willing to introspect, reflect, reflect or evaluate themselves so that their abilities as a teacher / teacher are expected to be quite professional. Based on the results of research it can be concluded that through the talaqqi method can improve the ability to read the Qur'an of students. This can be seen in each cycle, in the pre-cycle the average results of students' Qur'anic reading ability by 65% with incomplete categories, and only 8 students out of 23 students only reached the average grade (completed). After the first cycle, the ability to read the Qur'an rose to 85% which was categorized as complete which amounted to 17 students out of 20 students. In cycle II the ability to read the Qur'an students experienced a significant increase with an average score of 80.5 with a complete category, with the number of students completed as many as 20 students.
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Yan, Junzhi, Yuming Sun, Junxi Cai, et al. "Construction of ZnCdS Quantum-Dot-Modified CeO2 (0D–2D) Heterojunction for Enhancing Photocatalytic CO2 Reduction and Mechanism Insight." Catalysts 14, no. 9 (2024): 599. http://dx.doi.org/10.3390/catal14090599.
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It is important to improve the separation ability of photogenerated electrons and the adsorption capacity of carbon dioxide (CO2) for efficient photoreduction of CO2. Here, we synthesized ZnCdS quantum dots (ZCS-QDs) and cerium dioxide nanosheets (CeO2) using the solvothermal method and calcination method. We combined CeO2 and ZCS-QDs to effectively enhance the charge separation efficiency, and the lifetime of photogenerated electrons was increased 4.5 times. The CO evolution rate of the optimized composite (ZCS-QDs/CeO2) was up to 495.8 μmol g−1 h−1, and it had 100% product selectivity. In addition, the stability remained high after five cycles. The CO2 adsorption capacity of the catalyst surface was observed by in situ FTIR. The test results showed that improving CO2 capture ability and promoting photogenic electron separation had positive effects on enhancing photoreduction of CO2. This study provides a reference for constructing a zero-dimensional–two-dimensional (0D–2D) heterojunction and explores potential CO2 reduction reaction mechanisms.
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Volovenko, Olesya B., Olga A. Zaporozhets, Vladyslav V. Lisnyak, and Olga Yu Boldyrieva. "Platinum surface complexes as precursors for H2–O2 recombination catalysts." Adsorption Science & Technology 35, no. 7-8 (2017): 735–43. http://dx.doi.org/10.1177/0263617417708430.
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In this work, the adsorption of platinum (II, IV) chloride complexes from acidic solutions on silica gel modified with quaternary ammonium salts (QAS) was studied. The uptake of the platinum chloride complexes is caused by the formation of ionic (QAS+)2[PtCl x]2− ( x = 4, 6) associates on the surface of silica gel. The isotherms of adsorption are fitted by the Langmuir model. The maximum capacity for [PtCl4]2− and [PtCl6]2− is 0.99 and 1.13 mmol/g, correspondingly. The respective adsorption constants KL = 6.8 and 10 × 105 l/mol prove the high affinity of the adsorbates to the QAS-modified surface. Platinum metal nanoparticles supported on the surface of the silica gel were prepared by reducing the adsorbed platinum (II, IV) complexes. Such nanoparticles functioning at the moderate temperature regime have demonstrated a reasonable catalytic activity for the hydrogen and oxygen recombination, and an excellent stability over 35 cycles of the reaction.
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Li, Jingye, Jian Gong, Jean-Michel Guldmann, Shicheng Li, and Jie Zhu. "Carbon Dynamics in the Northeastern Qinghai–Tibetan Plateau from 1990 to 2030 Using Landsat Land Use/Cover Change Data." Remote Sensing 12, no. 3 (2020): 528. http://dx.doi.org/10.3390/rs12030528.
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Land use/cover change (LUCC) has an important impact on the terrestrial carbon cycle. The spatial distribution of regional carbon reserves can provide the scientific basis for the management of ecosystem carbon storage and the formulation of ecological and environmental policies. This paper proposes a method combining the CA-based FLUS model and the Integrated Valuation of Ecosystem Services and Trade-offs (InVEST) model to assess the temporal and spatial changes in ecosystem carbon storage due to land-use changes over 1990–2015 in the Qinghai Lake Basin (QLB). Furthermore, future ecosystem carbon storage is simulated and evaluated over 2020–2030 under three scenarios of natural growth (NG), cropland protection (CP), and ecological protection (EP). The long-term spatial variations in carbon storage in the QLB are discussed. The results show that: (1) Carbon storage in the QLB decreased at first (1990–2000) and increased later (2000–2010), with total carbon storage increasing by 1.60 Tg C (Teragram: a unit of mass equal to 1012 g). From 2010 to 2015, carbon storage displayed a downward trend, with a sharp decrease in wetlands and croplands as the main cause; (2) Under the NG scenario, carbon reserves decrease by 0.69 Tg C over 2020–2030. These reserves increase significantly by 6.77 Tg C and 7.54 Tg C under the CP and EP scenarios, respectively, thus promoting the benign development of the regional ecological environment. This study improves our understanding on the impact of land-use change on carbon storage for the QLB in the northeastern Qinghai–Tibetan Plateau (QTP).