bluuebunny/crossref_metadata_2025_split huggingface dataset:
Manufacturing of Mg-Al5TiB composite and addition of nano-sized Al2O3 through stir casting method with T6 heat treatment temperature variation
Authors: Yusuf S , Syahrial A Z 
Published: October 2020

Abstract
In order to find aluminium replacement for vehicle structure and also application of automotive components, the research on Mg-Al-Ti-B composite was performed in this work. The composite of magnesium is highly compatible to be applied in vehicle body structure because of its low weight and density. Therefore, the lightweight of vehicle body structure, great mechanical properties, and high efficiency can be obtained. Mg-Al-Ti-B serves as the matrix, and 0.20 vf% of nano-sized Al2O3 is applied as the reinforcement. The composite of Mg-Al-Ti-B was produced through a stir casting process. Hereafter, T6 heat treatment was employed with variation of aging temperature, such as 170 °C, 200 °C, 230 °C and 260 °C for 6 h, subsequent the previous 1 h, 420 °C for the treatment of solution. The T6 heat treatment impact on microstructure indicates a different morphology of primary Mg17Al12 in which spheroidization occurs, the precipitation of Al3Ti and TiB2 are also observed from the aging process. In this work, OM, EDS, XRD, OES, density and porosity measurements, as well as destructive tests were performed for the characterization. The T6 heat treated sample’s mechanical properties were rectified than the non-heat treated ones. The highest ultimate tensile strength was obtained with 65.31 MPa at 170 °C aging temperature. The optimum value of hardness, impact value and wear rate are observed at 200 °C aging temperature, the values are 92.4 HRH, 0.07 J/mm2 and 0.00254 mm3/m, respectively.
Development study of iron-based metal organic frameworks (Fe-based MOFs) as a binding agent in diffusive gradient in thin film method (DGT) for phosphate adsorption
Authors: Sintya V , Saefumillah A , Zulys A 
Published: October 2020

Abstract
In this study, Fe-based Metal Organic Frameworks (MOFs) will be developed as a binding agent in Diffusive Gradient in Thin Film (DGT) for phosphate adsorption, where it will be evaluated for the effect of pH, adsorbent concentration and mixing time in phosphate loading capacity of Fe-based MOFs in DGT because these parameters can influence the capacity of phosphate adsorption. Fe-based MOFs were synthesized using ferrichloride as a binding agent and terephthalic acid as a linker in solvothermal conditions. Fe-based MOFs will be characterized by X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX), Brunauer-Emmelt Tellers (BET). The XRD peaks correspond to MIL-101 for 2 θ around 9 ° and 17 °. FTIR analysis indicated the broadening peak at 1595 cm−1 for C=O and 1395 cm−1 for C-C vibrational. The SEM analysis showed the morphology was rhombus. The BET analysis showed the surface area of Fe-based MOFs was 61.33 m2g−1. Fe-based MOFs have been successfully synthesized by the solvothermal method and then will be applied as binding agent in DGT. Furthermore, Fe-based MOFs in DGT will be used for phosphate adsorption and measured using Spectrophotometer UV-Vis.
Functionalization of titanium dioxide through dye-sensitizing method utilizing red amaranth extract for phenol photodegradation
Authors: Kurniawan Y S , Anggraeni K , Indrawati R , Yuliati L 
Published: October 2020

Abstract
In this work, red amaranth (RA) extract was utilized as the source of the natural pigments for dye-sensitizing of the TiO2. The natural pigments were isolated from the RA leaves through a maceration technique to obtain the RA extract as a red powder. Since photocatalytic efficiency of titanium dioxide (TiO2) under visible light is negligible, further modification such as by addition of dye-sensitizer is required. The TiO2 was sensitized using the natural pigments contained in the RA extract using (3-aminopropyl)trimethoxysilane (APTMS) as the linker agent through an impregnation method to give the dye-sensitized TiO2 composite (RA-APTMS/TiO2). After dye-sensitizing, new absorption peaks at 1632–1030 cm−1 were detected in the Fourier transform infrared (FTIR) spectra, which were corresponded to the functional groups of chlorophyll originated from the RA extract. Furthermore, the appearance of a new absorption peak at 665 nm in the diffuse reflectance ultraviolet-visible (DR UV-vis) spectra also supported the successful sensitization of the TiO2 by the RA extract. Photocatalytic tests showed that while the unmodified TiO2 could not degrade phenol under visible light, the RA-APTMS/TiO2 composites exhibited photodegradation ability in 9, 13, 22 and 7 % when using 5, 10, 20 and 30 % mass ratio of the RA extract, respectively.
Effect of zirconium substitution on structural and optical properties of lanthanum orthoferrite
Authors: Purnamasari I , Triyono D 
Published: October 2020

Abstract
Lanthanum Orthoferrite (LaFeO3) is one of the perovskite oxide ABO3 materials. In this study, LaFe1-x
Zr
x
O3 ( x = 0.01, 0.03 and 0.05) were synthesized by sol-gel method. Synthesized LaFeO3 with substituted Zr on Fe-site was characterized for crystal structures and optical properties. The X-ray diffraction (XRD) analysis confirms that the LaFe1-x
Zr
x
O3 material has an orthorhombic structure with Pnma space group. The local structure of this sample was studied using Raman spectroscopy. Raman analysis shows, there are Zr4+ substituted effect on the tilt and stretching phonon modes of LaFeO3. Fourier Transform Infrared (FTIR) characterization test confirmed the effect of substitution on structural properties in terms of the upward shift of tilt, bending, and symmetric stretching of Fe-O-Fe bonds in FeO6. Optical bandgap has been determined using Kubelka-Munk function with the Tauc connection by the Uv-Vis Spectrophotometer which shows that the energy bands decrease (2.14–2.10 eV) with increased Zr-content.
Modification of fly ash using acids and alkali by hydrothermal method and its application as adsorbents material for phosphate adsorption in aquatic system
Authors: Wulandari W R , Saefumillah A , Yunarti R T 
Published: October 2020

Abstract
In this research, fly ash was modified with acids, such as HCl, H2SO4 and mixture of both and alkali with hydrothermal method. XRF analysis showed a decrease of CaO and Fe2O3 contents in HMFA, SMFA and HSMFA while AMFAWH has higher CaO content and produced the new zeolite phase (hydroxy-sodalite) in 2 θ = 24.232 ° from XRD test. FTIR analysis showed that the fly ash gave absorption band of O-H group, H-O-H bend group, and Si-O stretching group. SEM images showed that acid-modified fly ash indicated a deposition of gehlenite crystals while AMFAWH showed flat rectangular shaped small particle known as hydroxy-sodalite. The BET method analysis indicated that all adsorbents were classified as mesopores. The experimental data showed that adsorption efficiency and capacity of fly ash was improved significantly after modification. The unmodified fly ash (UFA) has the highest phosphate adsorption efficiency and capacity in 0.16 g was 60.07 % and 0.485 mg P-PO4/g while modified fly ash (HSMFA) was 85.62 % and 0.705 mg P-PO4/g. The optimum contact time were obtained at 240 min for UFA, HMFA, SMFA and 480 min for HSMFA and AMFAWH. The optimum of pH were obtained at pH 5 and pH 7 for the others. The fifth adsorbents follow the Freundlich isotherm and pseudo-second-order kinetic model in phosphate adsorption.
Lanthanum based metal organic frameworks as a new binding agent material for diffusive gradient in thin film (DGT) technique in bioavailability of phosphate removal
Authors: Santikasari C , Saefumillah A , Zulys A 
Published: October 2020

Abstract
High concentration of bioavailable phosphorus in aquatic system has been resulting in the eutrophication phenomenon that can trigger algae bloom. The measurement of bioavailable phosphorus in water body is needed. The diffusive gradient in thin film (DGT) is a well-developed in-situ analytical tool for separation and determination if bioavailable phosphorus or dissolver reactive phosphate (DRP). Using lanthanum based metal organic frameworks (La-MOF) with high surface area and tuneable pore might attribute the capacity of DRP adsorption in binding film. The surface area analysis of La-MOF powder was 84.957 m2 g−1. La-MOF then dispersed in gel solution to perform a binding film La-MOF then used in DGT tool for DRP uptake. The swelling activity of diffusive film was 2.24 and 1.93 for binding film La-MOF. The elution efficiency of DRP from binding film La-MOF was 95 % using HNO3 0.05 mol.L−1 as an eluent. The diffusion coefficient of DRP from La-MOF DGT was 2.216 × 10−6 cm2.s−1. Optimum DRP uptake capacity was up to 37.83 μg P with optimum time of deployment of 24 h. This research shows that the DRP uptake on DGT La-MOF was depended on the time deployment and DRP solution concentration.
Synthesis and characterization of lanthanide metal-organic framework with perylene 3,4,9,10-tetracarboxylate ligand
Authors: Christina L C , Gunlazuardi J , Zulys A 
Published: October 2020

Abstract
Metal-organic framework (MOF) as a semiconductor material has unique properties and potency to be utilized as a photocatalyst. The superiority of MOF compared to other semiconductor materials is due to the more possibility of adjusting its structure and properties by varying the metal type and organic ligand as the linker to create various framework building blocks, for a number of different applications. In this study, MOFs composed of lanthanide metals (samarium and dysprosium) and PTC ligand (perylene-3,4,9,10-tetracarboxylate), were synthesized and their structural and photochemical properties were characterized. MOFs synthesis were carried out using solvothermal method at 170 ºC, with the variation of metal to ligand mole ratio of 1:1, 2:1 and 1:2 for each metal. FT-IR characterization indicates that in all samples of MOF, PTC ligands coordinate with metals in bidentate ligand mode, which is supported by the existence of peak at around 1770 cm−1 that resembles stretching vibration peak of conjugated C=O anhydride. XRD characterization reveals a quite good crystalline phase in at least two samples, which are Sm-PTC MOF (1:1) and Dy-PTC MOF (1:1), although their crystal types are not known yet. Characterization with UV-Vis DRS shows band gap energy for all samples of MOF ranges from 2.175 eV to 2.328 eV. The obtained band gap energy values indicate that these MOFs will have an excellent respond toward the visible or solar light and, therefore, can be considered as materials suitable for photocatalysis.
Synthesis of hierarchical Fe2O3/ZSM-5 from natural minerals as catalyst in partial oxidation of bio-methane
Authors: Rafli M , Faisal M , Nurani D A , Saragi I R , Krisnandi Y K 
Published: October 2020

Abstract
Partial oxidation reaction of bio-methane as a source of methane using ZSM-5 heterogeneous catalyst modified with iron oxide has been carried out. In this study, the ZSM-5 catalyst was synthesized using the double template method using kaolin and natural zeolite as silicate and aluminate sources. The as-synthesized ZSM-5 nat and the Fe2O3/ZSM-5 nat catalysts were analyzed using XRD, XRF and BET. The characterization reveals that the synthesis of ZSM-5 was successful and the amount of iron(III) loaded was 2.98 %. The application test of Fe2O3/ZSM-5 nat as a catalyst was carried out in stainless steel batch reactor with a certain CH4:N2 feed ratio at 150 °C for 120 min. The reaction products were then analyzed with GC-FID to measure the % yield of methanol product. It is found that Fe2O3/ZSM-5 nat catalyst could give 54.93 % yield of methanol. Although the use of bio-methane as feed with lower CH4 : N2 ratio, this catalyst was also active and produced 12.26 % yield of methanol.
Catalytic depolymerization of lignin from wood waste biomass over natural sourced ZSM-5 catalysts
Authors: Pratama A P , Krisnandi Y K , Abdullah I 
Published: October 2020

Abstract
Lignin isolated from wood waste biomass, contains 61.07 % of lignin, was converted to vanillin using ZSM-5 catalysts. Prior to use, wood waste biomass was delignified to enrich its lignin contents followed by added 10 % H2SO4 to isolate the lignin such as solid black material. Three types of ZSM-5 catalysts i.e. hierarchical ZSM-5, NiO/hierarchical ZSM-5 and CuO/hierarchical ZSM-5 zeolites were used as catalysts in this study. Hierarchical ZSM-5 zeolite was prepared through TPAOH template synthesis methods followed by PDDAM as secondary template. Silicate and aluminate source based on a natural source to form hierarchical ZSM-5 zeolite. Hierarchical ZSM-5 zeolite is modified with NiO and CuO by using impregnation method with Ni nitrate and Cu nitrate solution followed by calcination at 550 °C. The characterization of catalysts employed FTIR, XRD, andSEM-EDX. The reaction was carried out in 200 mL-batch reactor at 100 °C, 150 °C, 200 °C, 250 °C and 300 °C in the presence of ethanol and water (v/v) for 30 min. CuO/hierarchical ZSM-5 zeolite gave the highest % yield of vanillin as product (4.68 %) followed by NiO/hierarchical ZSM-5 zeolite (3.82 %) for the variation of temperature, compared to other ZSM-5 catalysts.
Calculation of anisotropic reflectance of SrNbO3.4 within Density Functional Theory
Authors: Parusa G , Syahroni A , Majidi M A 
Published: October 2020

Abstract
A recent experimental study on SrNbO3.4 material has revealed a very pronounced anisotropy of its complex dielectric function. This material shows a metallic characteristic along
a
crystal direction but behaves as an insulator along
b
and
c
crystal directions. To investigate this interesting phenomenon, we perform first-principles calculations within density functional theory, to theoretically produce the complex dielectric functions along those crystal directions, and predict the anisotropy of the corresponding reflectance. This result ensures its anisotropic optical property and can explain the unique feature of this material under exposure of electromagnetic radiation.
Mercury effects on the early seedling of Paraserianthes falcataria (L.) Nielsen grew in hydroponic culture
Authors: Yuniarti R , Yuniati R 
Published: October 2020

Abstract
The purpose of this research was to investigate the impact of various level of mercury on the early seedling growth of sengon, Paraserianthes falcataria (L.) Nielsen using hydroponic culture. The study was carried out in twenty replications under greenhouse condition. The mercury used in this study were provided as chloride salts. Eight concentrations (30, 40, 50, 60, 70, 80, 90 and 100 µM) were used in this study. For each treatment, the pH was adjusted to 4.5. Fourteen-day-old seedlings were exposed to HgCl2. Shoot and roots system of control and mercury-stress plants were harvested after 7 days of treatment. Seedling response to mercury stress was observed in the plant parts on the 3rd day after the treatment, and become severe on the 7th day. Results showed that 30 and 40 µM, the concentrations had minimum inhibitory effects on the seedling growth, respectively. The results also revealed both shoot and root dry weight of the treated seedling were sharply reduced as the mercury concentration increased to 60 µM. In a concentration of 70–100 µM the biomass dry weight was not much different. Research results show this plant can be considered as a strong candidate for a phytoremediation agent.
Characterization and Performance of PAni-TiO2 Photovoltaic Cells Treated by RF Plasma
Authors: El-Hossary F. M. , Ghitas Ahmed , Abd El-Rahman A. M. , Ebnalwaled A. A. , Abdelhamid Shahat M. 
Published: October 2020

Abstract
Severe research attempts are still in progress to improve the performance of polyaniline (PAni) based photoactive layers as one of the cheapest materials used for manufacturing organic solar cells. Herein, polymer solar cells were fabricated with ITO/(PAni-TiO2)/Au system. The photoactive layers (PAni-TiO2) were treated with a hydrogen-plasma discharge for low processing time of 0, 3 and 5 min to enhance the synthesized solar cells efficiency. The morphology, micro structure and optical properties of the prepared samples and plasma treated nanocomposite layers were investigated and discussed. The performance of bulk heterojunction (BHJ) cell samples have been systematically investigated before and after plasma treatment. The absorption and optical band gap energy is increased after the treated PAni-TiO2 photoactive layers. It is found that, the efficiency was enhanced to 0.7% after 5 min of hydrogen plasma process compared to 0.36% for the pristine cell. The efficiency increase is ascribed to a structural change that accompanied by a rapid increase in surface roughness, which leaded to a decrease in the reflected photons and in turn an increase in the produced charge carriers.
Pulsed versus continuous-wave Laser deoxygenation of graphene oxide suspensions
Authors: El-Brolossy T. A. , Abdallah T. , Talaat H. 
Published: October 2020

Abstract
We report on a comparative study of laser deoxygenation of graphene oxide (GO) suspensions in pure water (pH∼7) using pulsed (nanosecond with wavelength 532 nm and fluence ∼ 0.15 J/cm2) and continuous-wave (CW) (of wavelength 448 nm and power density ∼ 0.25 MW/cm2) lasers at room temperature. Such comparison was not performed previously for GO suspensions. Concentrated GO colloidal suspensions were prepared by a modified Hummer’s method. The presence of oxide groups in GO was proved using X-ray diffraction and Fourier transform infrared (FTIR). The laser deoxygenation processes were verified by means of UV-visible, FTIR and micro-Raman spectroscopies. The impact of changing the laser irradiation time for both lasers has been investigated using the characteristic Raman bands (D and G) of GO as markers to assess the degree of reduction as well as the structural defects of the resulting laser RGO.
Effect of local additive (BM2010) on high performance concrete under sulphate attack
Authors: Megahid Ahmed A. , Fargal Omar A. , Elrazek Mostafa Abd , Eltawab Ashraf Abd 
Published: October 2020

Abstract
Many of reinforced concrete structures especially underground and undersea are subjected to aggressive environmental conditions throughout their exploitation. These conditions are represented by the aggressive sodium sulphate attack from surrounding soil or underground water. When based materials of cement are exposed to sodium sulphate attack produce gypsum and ettringite by its chemical reactions. Formation of gypsum plays a very important role within the damage of materials. According to that the actual compressive strength of concrete elements decreases accompanied with large deformations of concrete. Consequently, a higher reduction of the construction durability occurs, so using of effective and economic admixture for concrete elements protection against sulphate attack or the other environmental conditions is needed.
The main purpose of this research is to study through an experiment the effect of the local admixture (BM2010) which contained in its composition wastes from petroleum industries, silica fume, Wastes of coke factory and its mechanism effect on the compressive strength of concrete specimens subjected to external sulphate attack.
The experimental results showed that Compressive strength of concrete specimens modified with the organic admixtures (BM2010) at age of 128 days hardened in salt solution with concentration (9%NaCl + 12% Na2SO4) increased by about 15% compared to the control specimen with (Addicrete dm2) for sulphate resistance cement (S.R.C) & 3.6% compared to the control specimen (without admixture) for ordinary Portland cement (O.P.C). The absorption of concrete specimens modified with the organic admixture (BM2010) at age of 128 days hardened in salt solution with concentration (9%NaCl + 12% Na2SO4) is less than concrete specimens modified with (Addicrete dm2) by about 29%percent in case of (S.R.C) but in case of (O.P.C) it is more by about 16% percent. The experimental results showed that, the optimum composition of all components of the suggested admixture (BM 2010) was successfully and experimentally achieved.
Concomitant Chronic Lymphocytic Leukemia and Mantle Cell Lymphoma Discovered by Flow Cytometry
Authors: Erickson K M , Lynch D 
Published: October 2020

Abstract
Casestudy: Chronic lymphocytic leukemia (CLL) accounts for about 30% of all lymphoid neoplasms and is the most common adult blood cancer in the Western world. Mantle cell lymphoma (MCL) accounts for only about 6% of all B-cell lymphomas in Western countries. MCL and CLL are both CD5 positive B-cell lymphoproliferative disorders. It is necessary to distinguish these two entities as MCL is a more aggressive disease, and requires specific treatment. MCL and CLL can occur in one patient at the same time and is often termed a composite lymphoma. We present an 84-year-old female with a history of endometrial cancer who was found to have splenomegaly and lymphadenopathy. Flow cytometry was performed upon her peripheral blood specimen which demonstrated two distinct populations of abnormal light chain restricted B-cell populations. One population demonstrated kappa light chain restriction and was positive for CD45, CD19, CD20, CD5, CD38, FMC-7, and CD22, representing MCL. The other population showed dim lambda light chain restriction that was also positive for CD45, CD19, dim CD20, CD5, and CD23, representing CLL. FISH studies demonstrated t(11;14), and four common deletions or chromosome aneuploidy associated with CLL. These findings confirmed the dual populations of CLL and MCL. This is an interesting case because it is a very rare combination with only a few cases having been reported with two distinct cell populations in one patient at the same time.
Papillary Squamous Cell Carcinoma of the Cervix: Human Papillomavirus (HPV) Status and Clinicopathologic Features
Authors: Schechter S A , Elshaikh A , Walline H , Skala S L 
Published: October 2020

Abstract

Introduction/Objective
Papillary squamous cell carcinoma (PSCC) is a rare cervical neoplasm composed of papillae lined by atypical squamous/transitional cells without koilocytosis. It is unclear whether PSCC is related to human papillomavirus (HPV) infection, though rare cases were reportedly associated with HPV type 16. PSCC is thought to be more common in postmenopausal women. Some authors have suggested that PSCC may be understaged due to the prominent exophytic nature of the superficial aspect and relatively deep location of underlying infiltrative nests. It has also been suggested that PSCC has a tendency to recur and/or metastasize late.

Methods
The surgical pathology database of a single large academic institution was searched for squamous cell carcinoma (or squamous cell carcinoma in situ) with papillary features from the cervix, sampled between 1996 and 2018. PCR for human papillomavirus (HPV) L1 protein was run, with sequencing of positive samples.

Results
5 cases diagnosed as “papillary squamous cell carcinoma” were identified. Patient age ranged from 21–63 years (mean 46 years). All tumors showed papillary architecture, often with complex branching and/or fusion. The neoplastic cells had a squamous/transitional appearance with moderate to marked cytologic atypia and at most focal keratinization. Stage ranged from pT1b1 to pT3b (clinical stage IB1 to IVB). HPV L1 PCR was positive in only one case; sequencing confirmed HPV type 16. Upon closer review, the HPV-positive case was from the youngest patient and showed adjacent low-grade squamous intraepithelial lesion (LSIL) as well as focal koilocytic change within the papillary tumor.

Conclusion
Our findings suggest that even in patients with HPV infection, PSCC may be an HPV-independent malignancy. In multiple cases, it was difficult to obtain definitive histologic evidence of invasion prior to resection.