bluuebunny/crossref_metadata_2025 huggingface dataset:
The Effect of Self-Healing Microorganism-Encapsulating Concrete on Enhancing Concrete Compressive Strength
Authors: CHEN Ming Ta , LIN Hui Yi
Published: November 2023

Investigating microbially induced calcite precipitation (MICP) of concrete in bacillus and the durability of crack-filled repair structures were the goals of this work. The purpose of this study was to investigate the self-healing effect of concrete in bacillus and the strength of crack-filled repair structures. The characteristics of calcium carbonate particles and the performance of those penetrating cement were observed using optical microscopy. The cement block pressure test was used to study the factors affecting the healing rate of concrete materials mixed with microorganisms. The results showed that the microorganisms had good microscopic morphology. Microbial mixed soil had good compression resistance, and the ability to play a repairing role in mixed soil composite materials was that organisms could be attached to the concrete tightly. The main fracture behavior of the mixed soil was a small-hole rupture, while no macroscopic damage or large-pore ruptures were observed in the mixed soil matrix. Sporosarcina pasteurii exhibited better potential than Bacillus subtilis and could act as a self-healing agent in the concrete. The test results proved that S. pasteurii produced a colloidal adhesive to fill and repair cracks. The study designed concrete of different densities to create cubes having different compressive strengths, water permeability, and water absorption to further observe the ability of Bacillus to fill the cracks and prevent water penetration. The results showed a 60 % increase in the compressive strength of the coarse aggregate experimental sample and a 36 % decrease in the compressive strength of the fine aggregate experimental sample, relative to the same properties in the control sterile sample. Samples indicating the use of bacteria in the aggregate were denser and less porous. It was proven that the use of microorganisms could achieve self-healing ability in concrete materials, fill up pores, and establish functional effects.
Telegram in der politischen Öffentlichkeit. Zur Einführung in das Themenheft
Authors: Wiedemann Gregor , Schmidt Jan-Hinrik , Rau Jan , Münch Felix Victor , Kessling Philipp
Published: November 2023

Telegram ist in den vergangenen Jahren zu einem relevanten Bestandteil der politischen Öffentlichkeit geworden. Der Instant-Messaging-Dienst unterstützt sowohl den interpersonalen Austausch als auch die Informationsverteilung an nahezu beliebig große Publika. Zugleich entzieht er sich bislang vergleichsweise erfolgreich allen Regulierungsversuchen, die Verbreitung von Desinformationen, Hassrede oder anderen problematischen Inhalten einzuschränken. Dadurch ist Telegram vor allem, aber nicht nur, bei Akteur*innen und Gruppen beliebt, die am Rande oder jenseits des demokratisch akzeptablen Spektrums agieren. Das vorliegende Themenheft versammelt sieben Beiträge, die mit verschiedenen Methoden die Rolle von Telegram in der deutschsprachigen politischen Öffentlichkeit erkunden und weiteren Forschungsbedarf identifizieren.
Zwischen Staatsskepsis und Verschwörungsmythen. Eine Figurationsanalyse zur kommunikativen Konstruktion von Gegenöffentlichkeiten auf Telegram
Authors: Bader Katarina , Müller Kathrin Friederike , Rinsdorf Lars
Published: November 2023

Der Beitrag analysiert, wie Telegram-Kanäle, deren Inhalte emotionalisieren, polarisieren und desinformieren, ausgestaltet sind. Dabei gehen wir davon aus, dass sich auf Telegram staatsskeptische Gegenöffentlichkeiten kommunikativ konstituieren, die sich entlang spezifischer Akteur*innen, Praktiken, Themen und Orientierungshorizonte als Figuration rekonstruieren lassen. Diese Rekonstruktion erfolgt auf Basis von Experteninterviews und einer qualitativen Inhaltsanalyse von 576 Posts reichweitenstarker deutschsprachiger Telegram-Kanäle. Wir arbeiten heraus, wie unterschiedliche Akteur*innen staatsskeptischer Gegenöffentlichkeiten Telegram-Kanäle in Hinblick auf Themen, Darstellungsformen und den Einsatz von Verlinkungen bespielen, und entwickeln auf dieser Basis eine Typologie. Als eine zentrale Praktik, die von verschiedenen, wenn auch nicht von allen Akteur*innen angewandt wird, erweist sich das Kuratieren: Inhalte, die oft multimedial aufbereitet sind, werden dabei von anderen Plattformen, aus anderen Telegram-Kanälen und von alternativen und etablierten Medien übernommen. Diese Praktik stellt Verbindungen her zwischen monothematisch ausgerichteten Kanälen, Kanälen, die sich klar einer bestimmten Ideologie zuordnen lassen, und solchen, die ein breites Spektrum an Themen und Orientierungshorizonten bedienen.a
Kolize předběžných opatření: domácí násilí a styk s nezletilým
Authors: Wranová Sára
Published: November 2023

Pro případy domácího násilí nabízí český právní řád procesní nástroj, který obětem poskytuje téměř bezprostřední pomoc: předběžným opatřením ve věci ochrany proti domácímu násilí může soud odpůrci mj. uložit, aby se zdržel setkávání s navrhovatelem (§ 405 odst. 1 písm. c) z. ř. s.). Pro úpravu styku s nezletilými za jakékoli situace je tady pak řízení ve věcech péče soudu o nezletilé, ve kterém může opatrovnický soud styk upravit či zakázat, a to i předběžným opatřením (§ 76 odst. 1 písm. e) o. s. ř.). Pokud se tyto dvě situace setkají a domácí násilí je směřováno od rodiče proti nezletilému, má nezletilé dítě dva prostředky ochrany, aniž by se právní řád, judikatura nebo odborná literatura vyjádřily k tomu, jaký je mezi těmito dvěma prostředky vztah.Může se proto stát, že nejdříve soud na návrh nezletilého setkávání rodiče a nezletilého zakáže předběžným opatřením podle § 405 odst. 1 písm. c) z. ř. s., ale následně opatrovnický soud nařídí na návrh toho stejného rodiče předběžné opatření, kterým jeho styk s nezletilým upraví (resp. ho tím ke styku opravňuje). Jelikož jsou předběžná opatření vykonatelná vyhlášením, mohou být obě rozhodnutí vykonatelná souběžně, aniž by jedno z nich bylo vadné nebo aniž by byla určena jejich hierarchie. Jsou proto v kolizi.Příspěvek nastalou situaci popisuje s pomocí modelového případu. Za použití zejm. metody analýzy právní úpravy, judikatury a literatury dochází k závěru, že v modelovém případu jde o stejnou věc, a proto by měla být aplikována překážka litispendence, příp. překážka věci rozhodnuté. To v praxi znamená, že soud má řízení zahájené jako druhé v pořadí zastavit, nebo odvolací soud v tomto řízení rozhodnutí zrušit a řízení poté zastavit. Příspěvek nicméně dále upozorňuje na to, že se v různých fázích řízení může měnit závěr o tom, na kterém ze dvou řízení vázne jedna z překážek a to má být proto zastaveno, jelikož v čase může dojít k „převrácení“ vadného řízení – z prvně zahájeného řízení se může stát řízení vadné a naopak. To záleží na mnoha proměnných, včetně procesní aktivity účastníků.V řízeních s nezletilými je zvýšený zájem na dodržování procesních záruk a pravidel a taková řízení by měla podléhat přísnějším požadavkům na ochranu nezletilých, proto autorka navrhuje, aby byly na kolize aplikovány překážky litispendence a věci rozhodnuté. Příspěvek však navíc zkoumá, co je nejlepším zájmem dítěte v situacích domácího násilí, a zda je jedno z řízení o vydání předběžného opatření, které jsou nezletilému k dispozici, natolik vhodné, že by mělo být paušálně upřednostňováno. Autorka navrhuje novelizaci právní úpravy předběžného opatření ve věci ochrany proti domácímu násilí tak, že z aktivní legitimace k podání návrhu bude vyloučen nezletilý. Toto řešení má dvě výhody: ochrana tímto nástrojem v rozsahu vykázání ze společného obydlí bude pro nezletilého zachována, bude-li navrhovatelem druhý rodič nezletilého, a zároveň úprava styku s nezletilým zůstane pouze opatrovnickému soudu, ke kolizi proto nebude moci dojít a dvoukolejnost bude odstraněna.
Reporte de caso clínico: Hepatoblastoma del adulto
Authors: Nattes Paco Paola Andrea
Published: November 2023

El hepatoblastoma del adulto es una patología tumoral muy infrecuente donde a diferencia de la presentación en la infancia suele tener un pronóstico fatal. Se describe un caso clínico tratado en el Hospital Militar Central COSSMIL de la ciudad de La Paz de un paciente de 19 años, sin antecedentes personales patológicos ni familiares de tipo oncológico, diagnosticado de Hepatoblastoma epitelial tipo fetal Pretext IV que lo convierte en caso más infrecuente de presentación de edad adulta que fue tratado con quimioterapia neoadyuvante (Esquema SIOPEL) lográndose su posterior resección quirúrgica y tasa de supervivencia alta además de un periodo libre de la enfermedad de al momento de 5 años. Se han revisado múltiples aspectos que hayan sido a favor del paciente para detener la progresión de la enfermedad pese a su mal pronóstico inicial debido a su presentación en edad adulta.
Sarcoma de Kaposi secundario a tratamiento inmunosupresor con compromiso ganglionar: reporte de un caso
Authors: Silvana Yolanda Omonte Gonzales , Mejia Via Gerson , Herbas Zamorano Maya , Condori Barrozo Jose MigueL
Published: November 2023

Al tratarse de un tipo oncológico poco frecuente en nuestro medio, el sarcoma de Kaposi tiene que tomar importancia diagnostica. Por lo cual se decidió reportar el siguiente caso. Se trata de una paciente femenina de 38 años Post-Trasplante renal con terapia inmunosupresora que curso con compromiso ganglionar. Siguiendo el algoritmo diagnostico inicialmente se sospechaba de un proceso infeccioso aislando citomegalovirus para el cual se realizó tratamiento antiviral correspondiente.
Según protocolos internacionales se tomó biopsia ganglionar obteniendo reporte de Sarcoma de Kaposi; no presento compromiso visceral. La conduta terapéutica fue la reducción de la dosis de inmunosupresión con remisión completa en 6 meses.
Comparison of drought responsive protein patterns in 'leung pratew123' rice oryza sativa L.cv. leung pratew123 and its drought resistant mutant line
Authors:   , Chintakovid Nutwadee
Published: November 2023

The proteome-level study of the stress-susceptible (SS) Oryza sativa L. cv. Leung Pratew123 and its stress-resistant (SR) mutant line, Leung Pratew123-TC171 were conducted to identify a drought response mechanism in SR line. Based on the proteomics data, two proteins; GT-2 LIKE 1 (GTL1) and Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) which are involved in stomata density reduction and e- transfer in Calvin Cycle, respectively were selected for further study. It was found that the SR rice had the lower stomatal density than SS rice when grown under drought stress. This is consistent with the lower level of GTL1 protein found in SR during drought stress. In addition, SR showed higher relative water content than SS after drought treatment. Besides, measurement of the leaf gas exchange parameters was conducted in the old and the young leaves in both SS and SR. After 3 days of drought stress (12.5% PEG), old leaf of SR had significant higher net photosynthetic rate and water use efficiency than SS. Likewise, effective quantum yield of PSII photochemistry (ΦPSII) and electron transport rate were also higher in SR than SS line. Similarly, higher GAPDH level under drought stress was found in SR line. Moreover, transpiration rate in the young leaf was significantly lower in SR line. Overall, SR rice mediates drought stress through GTL1 which regulates stomatal density leading to less water loss in the newly developed leaves, while in the old leaves the adaptation in GAPDH helps protecting photosystem under drought stress.
Diversity of pteridophytes in Phu Kradueng National Park, Loei province
Authors:   , Jadprajong Prapaporn
Published: November 2023

Phu Kradueng National Park, Loei province, is the place that has richness species of
pteridophytes which 24 families, 62 genera and 147 species have been reported in
Flora of Thailand since 1989.  This study aimed to investigate the diversity of
pteridophytes in Phu Kradueng National Park from December 2014 to February 2016.
We collected samples along the nature trails at 260 - 1,316 meters above sea level (mASL).
A total of 288 samples were identified into 26 families, 60 genera and 138 species.
Among these, 2 families, 4 genera and 16 species were lycophytes and 24 families,
56 genera and 122 species were monilophytes. The most common family was Polypodiaceae
with 25 species. Pteridaceae was the second most common family with 18 species.
Among these, three species, e.g., Asplenium siamense Tagawa & K. Iwats., Dryopteris
rheophila Mitsuta ex Darnaedi, Elaphoglossum dumrongii Tagawa & K. Iwats. and Selliguea
trisecta (Baker) Fraser-Jenk. were endemic to Thailand. Moreover, Selaginella sp.,
Asplenium sp. and Oleandra sp. were founded as new records to Thailand and may be
new species to science.
Use of metal mesh to increase absorption efficiency of volatile organic compound in microchannel
Authors:   , Prasomsup Rachata
Published: November 2023

Volatile organic compounds (VOCs) emissions can cause environmental problems and public health. Absorption is an effective method to reduce VOCs emission because it provides high capacity and low operating costs. In this work, microchannel was applied to increase mass transfer and interfacial area between the gas and liquid solvent. Moreover, a stainless steel mesh was used to prevent dispersion of one phase into the other. The stainless steel mesh was placed between two channels gas- and liquid-sides of the channel. The stainless steel mesh size was varied by using stainless steel mesh number 100, 200, and 300. Toluene was used as a representative of VOC and vegetable oil was used as a liquid solvent. The result of this work was found that the gas to liquid solvent flow rate ratio was a factor to control separation of gas and the liquid solvent. Moreover, size and surface property of stainless steel mesh played a crucial role in keeping gas and the liquid solvent separated. In addition, the removal efficiency of toluene depended on the influence of gas flow rate, liquid flow rate, channel length, channel thickness, mesh size and inlet gas concentration. Moreover, the removal efficiency of toluene was up to 97 % in this work. Finally, the liquid-side volumetric mass transfer coefficients in this work were calculated and found to be as high as 0.00165 s-1.
Effect of gamma irradiation and spray drying on properties of ultrafine fully vulcanized powdered rubber (UFPR) as toughening fillers in polymers
Authors:   , Taewattana Rapiphan
Published: November 2023

The aim of this research was to prepare ultrafine fully vulcanized powdered rubbers (UFPRs) from natural rubber (NR), styrene-butadiene rubber (SBR) and nitrile rubber (NBR) by combination technologies of radiation vulcanization and spray drying. The latex form of these rubbers was changed to the vulcanized rubber latex by gamma vulcanization using gamma ray doses in a range of 0 to 250 kGy and the UFPRs particles were observed in a spray drying step. The effect of gamma radiation dose on properties such as swelling behaviors and thermal properties of irradiated rubber latices and UFPRs were investigated. An increase of gamma radiation dose affects to a decreasing of both swelling ratio and molecular weight between crosslink (Mc) of the vulcanized rubber. On the other hand, gel fraction, crosslink density, glass transition temperature and thermal stability of vulcanized rubber increased with increasing the dose of gamma rays. Moreover, the obtained UFPRs were used as toughening filler in polybenzoxazine (PBA-a) matrix. Comparing with the neat PBA-a, the glass transition temperature of PBA-a/UFPRs composites increased . Moreover, PBA-a/UFPNBR composites shows the highest value of flexural strength and flexural modulus over other composites systems at 150 kGy of gamma irradiation dose for UFPNBR vulcanization. The impact strength of all types of composites were also evaluated by izod impact test. The results show that all UFPRs can improve impact resistance of PBA-a based composites. From all results, it can be concluded that three types of UFPRs can be used as toughening fillers in polybenzoxazine matrix.
Combined hydrothermal carbon-based and lewis acid catalysts for conversion of cellulose
Authors:   , Boonyakarn Tat
Published: November 2023

The production of 5-hydroxymethylfurfural (HMF) and levulinic acid (LA) from cellulose is gaining considerable interests as these compounds are suitable starting materials for the preparation for valuable compounds. This study proposes a novel catalysis system, the combination of hydrothermal carbon based acid catalyst (HTCG-Sul) and Lewis acid, for the synergistic one-pot conversion of cellulose to HMF and LA. The CrCl3 (Chromium chloride) Lewis acid, when used alone was a suitable catalyst for cellulose conversion, giving highest HMF and LA yields compared with other metal chloride catalysts. When CrCl3 was combined with HTCG-Sul, the results showed that approximately 2 times higher of HMF (6.8 wt. % vs. 3.9 wt. %) and LA (22.9 wt. % vs. 11.2 wt. %), yields were obtained. Using combination of HTCG-Sul and CrCl3 as catalyst, the effect of operating conditions: including reaction temperature (160oC - 220oC), reaction time (0 - 60 min), CrCl3 concentration (0 - 0.02 molar) and HTCG-Sul dosage (0 – 40 wt. %) on cellulose conversion was studied first in a single phase reaction system. At the condition HTCG-Sul dosage of 5 wt. %, temperature of 200oC, reaction time of 5 min and CrCl3 concentration of 0.005 molar),   the highest HMF yield of 6.8 wt. % operating conditions of the highest LA yield was found however at a different condition: HTCG-Sul dosage 5 wt. %, 200oC for 5 min and 0.015 molar CrCl3 concentration, which gave 40 wt. % LA yield. Furthermore, a biphasic system using methyl isobutyl ketone (MIBK)/2-butanol (7:3) as an extractive phase, water as a reactive phase, and acetone as a co-solvent and the combination of HTCG-Sul and CrCl3 as catalyst was employed to improve the stability and the yield of HMF (17.7 wt. %).
COMPARISON OF NANOFILTRATION AND REVERSE OSMOSIS MEMBRANE WATER TREATMENT SYSTEMS FOR COOLING TOWER BLOWDOWN IN A CO-GENERATION POWER PLANT
Authors:   , Pungsang Baramate
Published: November 2023

Several power plants in Thailand are located in community area far from the natural sources of water and need to buy expensive tap water from private suppliers for use as a cooling water. This water is normally discharged without recycling back to the cooling processes. For this reason, the small size, low power consumption and effectiveness treatment methods like membrane processes for recycle blowdown water in the district power plant are interested. In this work, the performances for treatment blowdown water via two membrane treatment technologies, nanofiltration (NF) and reverse osmosis (RO) were investigated. Furthermore, attention was paid to ensuring that the pretreatment method could enhance the lifespan of the NF and RO membranes and decrease the membranes' fouling characteristics. Two different pretreatment methods, conventional and ultrafiltration (UF) were compared. For the conventional pretreatment, the results showed that the concentration of 150 mg/L of Polyaluminium chloride (PACl) in the presence of 1.0 ppm of anionic polyacrylamide (APAM) showed the best pretreatment performance in terms of silt density index (SDI) and turbidity. However, UF membrane showed a better pretreatment performance with lower SDI, and turbidity values, lower construction area, less chemical waste, and was selected to be appropriate pretreatment method for membrane treatment. For membrane treatment, NF showed the higher membrane permeability values (14.03 L/hr.m2.bar) but cannot be used as make up water because lower salts rejection (50%). Whereas RO showed the lower membrane permeability values (6.35 L/hr.m2.bar) but higher salts rejection (98%) and available for treatment blowdown water.
PERFORMANCE EVALUATION OF PRESSURE RETARDED OSMOSIS (PRO) PROCESS FOR POWER GENERATION
Authors:   , Aupahad Mintra
Published: November 2023

Pressure retarded osmosis (PRO) process is an interesting membrane technology for alternative power generation operating based on difference in osmosis pressure between river water and seawater. Water from river having a low salinity permeates through a membrane to the other side where elevated pressure seawater having higher salinity flows. The permeated water is then passed through a turbine to generate power. To date, there are a few works on development of mathematical models for predicting water flux, power density, and efficiency under specific conditions. The objective of this work is to investigate the effects of parameters to find the best operating conditions such as feed flow rate, water resources and membrane to obtain the highest performance in term of power density. The process simulation of PRO is performed by using Aspen Custom Modeler and Aspen Plus software. Thermodynamic analysis was studied for evaluation efficiency of system to compare with theoretical power generation. Moreover, the PRO process is scaled up to pilot scale for practical application. The capital cost is evaluated to find the possibility in power plant construction. The results show maximum net power of 15.99 kW and thermodynamic efficiency of 18.20% under river water as feed solution and using Lab TFC-PRO-1membrane.In addition, using Lab TFC-PRO-1 membrane reports minimum unit capital cost about $11,500 kW-1. Finally, the low quality resources that is waste water and brackish water which was used to benefit for power production by environmental friendly system.
Process simulation of Kraft lignin oxidation for vanillin production
Authors:   , Khwanjaisakun Nawaporn
Published: November 2023

Kraft lignin waste generated from Kraft pulping process can be potentially converted to a high value product such as vanillin. This work focused on feasibility study of vanillin production from Kraft lignin by oxidation reaction. A reaction model of Kraft lignin oxidation used in this work was selected from literature. The model was simulated by using MATLAB® software and many operating parameters such as feed concentration of Kraft lignin, reaction temperature, and oxygen partial pressure were optimized to obtain the highest yield of vanillin product. Then, three different separation methods i.e. vacuum distillation, solvent extraction, and solvent extraction followed by distillation were developed and compared in order to find the most suitable separation process for vanillin production. The simulation and comparison of different separation methods were done by using Aspen Plus® software. The result showed that the highest yield of vanillin at 9.25% could be obtained by using feed concentration of Kraft lignin at 30 grams/liter, temperature of 110 ⁰C, and oxygen partial pressure of 5 bars. The solvent extraction followed by distillation was found to be the most suitable separation method as it required low energy consumption and offered the lowest production cost. The economic analysis showed that in the best case, payback period and IRR of the vanillin production from Kraft lignin are 6.14 years and 22.96%, respectively.
Desalination by capacitive deionization in microchannel
Authors:   , Prakobsuk Onwanya
Published: November 2023

Water is a crucial factor for all living organisms. Although majority of the earth is covered by water, only small fraction the earth’s water is fresh water. The lacking of freshwater is an issue that every countries would like to solve. Desalination is one of the solutions. Unlike distillation and reverse osmosis, which require a lot of energy, capacitive deionization relies on removal of ions from water by applied potential. Hence it has potential to be cost effective. In this study, the capacitive deionization is applied in a microchannel. The experiments were conducted using NaCl solution. The 500-µm, 750-µm, and 1000-µm microchannel were formed between a graphite sheet used as anode and another graphite sheet used as cathode. The condition of the applied voltage was varied in the range of 0 - 5.0 V. Moreover, the graphite sheet was modified by steam activation at 1100°C for 30 minutes to increase its adsorption capacity. Activated graphites, gold sputtering on graphites and stainless steels were tested as electrodes. It was found that the use of the microchannel could significantly enhance the desalination efficiency by reducing mass transfer resistance. The salt removal would not increase as expected when operated over 2.06 volts, concerning electrolysis reaction. This objective of the study was to investigate behavior of the electrosorption of sodium ions and chloride ions within microchannel and study effect of electrode porosity in terms of desalinated efficiency.
EFFECT OF ETCHING PROCESS PARAMETERS ON STREAK DEFECT IN ANODIZED ALUMINUM
Authors:   , Sattawitchayapit Sirikarn
Published: November 2023

A streak defect on anodized aluminum is a major problem in the aluminum extrusion industry. It causes uneven color (dull or bright) on the surface of the extruded parts and can be easily observed. Many factors can contribute to the streak defect, such as poor surface quality of the extrusion die, abrupt change of bearing on the extrusion die, etc. In the current practice, a trial and error method is used during the etching process to eliminate the streak defect and this approach increases the production cost and time. The aim of this study is to experimentally investigate the effect of etching process parameters, i.e., concentration of NaOH, etching temperature and etching time on response variables (i.e., material loss, surface gloss difference and final surface roughness) of etched aluminum parts. The experiment was conducted in a total of 20 runs designed using Central Composite Design (CCD). Response Surface Methodology (RSM) was used to model and analyze regression equations for the response variables with the etching process parameters as the controllable factors. Analysis of Variance (ANOVA) was used to investigate the significance of these parameters to determine the regression equations as the predictive models. For the model validation, the predicted results showed high accuracy with maximum errors of 0.55% and 18% in weight loss and difference in surface gloss, respectively. Additionally, contour and 3D surface plots were obtained from RSM and were used to discuss the main effects and the interaction effects of the process parameters. Moreover, the overlaid contour plots in CCD analysis were used to determine an operational range for the removal of streak defect on extruded aluminum. Based on these results, guidelines for suitable etching process parameters to eliminate the streak defect on aluminum extrusion parts are provided.
REINFORCING NATURAL RUBBER WITH BACTERIAL CELLULOSE VIA LATEX SOLUTION PROCESS
Authors:   , Phomrak Sirilak
Published: November 2023

Natural rubber (NR) is an important material for a variety of the elastomer industry such as tires, automotive interior parts, gloves as well as packaging due to the excellent elastic properties. However, there are some drawbacks such as low tensile strength and low abrasion resistance. Moreover, its applications are also limited because of its poor resistance to oil and solvents. Preparation of NR-composites reinforced with cellulose to enhance Young’s modulus and tensile strength of the NR which is a decreasing solution to these defects and limitations has attracted much interest in recent years. Usually, in the mixing step of rubber-cellulose composite preparation, there are problems of agglomeration and low dispersion of cellulose due to the difference of molecular polarity between cellulose and NR. In this study, in order to enhance the properties of NR-composite films, we focus on NR reinforced with bacterial cellulose (BC) which has many advantages including biocompatibility, remarkable mechanical properties, and high hydrophilicity via one-step latex solution processing. In addition, this study will also explore the modification of NR-BC composites with organic acid to enhance the composite structural stability. The NR-BC composites (NRBC) and the acid modified NR-BC composites (ANRBC) films were characterized for physical, chemical and biological properties. The NRBC composites were successfully prepared via latex solution process. BC fibers dispersed homogeneously within the NR matrix for every concentration with different BC fiber contents. The mechanical properties of the NR-composite films were improved with the BC loading while the structural stability of ANRBC composites was enhanced after the acid modification. However, this improved NR-BC interaction had no significant effect on the biodegradability in soil.
Hydrothermal carbonization of water hyacinth for producing carbon electrode materials
Authors:   , Vanavanichkul Thantorn
Published: November 2023

Among various issues of water resource management, control of environmental nuisances, especially water hyacinth has become an important research topic in many countries because it is one of the invasive plants which resulted in social and environmental problems. This research studied conversion of water hyacinth into high value-added carbonaceous materials. Hydrothermal treatment was utilized for converting water hyacinth in temperature range 160-220 °C for 4-12 hours. It was found that the water hyacinth treated hydrothermally at 220 °C for 8 hours showed highest carbon content of 57.27 w/w%. Hydro-chars were carbonized for removing oxygen contained contents of hydrogen, oxygen, and other constituents. The carbonized hydro-char would possess a higher carbon and improved surface properties. It was found that the carbonized hydro-char at 900 °C sample which was hydrothermally treated at 180 °C for 8 hours possessed the highest specific surface area of 635.8 m2/g. Meanwhile, carbonized hydro-char at 900 °C sample which was hydrothermally treated at 220 °C for 8 hours possessed highest electric conductivity and carbon content of 73.1 w/w%. Moreover, the Fe-hybridized carbonaceous particle was successful synthesized by hydrothermal treatment and carbonization. Fe-hybridized carbonaceous was shown iron oxide 28.2 %w/w of the sample. Carbonized hydro-char was utilized as carbonaceous rods for fabricating electrode by conducting arc discharge in water
Effects of hydrothermal treatment on performance of flexible ZnO/PAN nanofibers for toluene vapor removal
Authors:   , Manoi Wuttichai
Published: November 2023

Polyacrylonitrile nanofibers decorated by zinc oxide nanorods were fabricated by combination of electrospinning technique and hydrothermal treatment. Suspension of 20 nm ZnO nanopartilces in PAN solution was subjected to electrospinning technique. The composite nanofibers of ZnO and PAN in the average diameter of 317 nm were obtained. The ZnO nanopartibles on the surface of PAN nanofibers act as nucleation sites for growth of ZnO nanorods. The obtained ZnO/PAN nanofibers were subjected to hydrothermal treatment process using the autoclave containing solution of zinc acetate and hexamethylenetetramine in water. The ZnO nanorods formed on the surface of PAN nanofibers. In addition, influence of zinc acetate concentration, treatment temperature, treatment time, and zinc acetate : hexamethylenetetramine ratio were also studied. It was also found that the obtained ZnO/PAN nanofibers still possess flexibility. The ZnO/PAN nanofibers were subjected to investigate performance of VOCs removal using photocatalytic reaction. Toluene was used as delegate for VOCs. It was found that the gaseous toluene could be degraded for more than 95% within 2 hours.
Azo-diazacrown ethers as metal ion and anion sensors
Authors:   , Koonrugsa Narongsak
Published: November 2023

Six azobenzene-diaza-18-crown-6 derivatives were synthesized and characterized by 1H, 13C-NMR, and mass spectroscopies. The three ester derivatives E1, E2 and EE2 did not show any special sensing property towards any metal ion. Acid and nitro derivatives showed solvatochromic effects and dependent sensing properties in various solvents. The acid derivative A2 displayed inseparable color yellow or green from orange upon addition of transition and heavy metal ions in DMSO which, unfortunately, could not be used as optical chemosensor. In contrast, the nitro derivatives N1 and N2 showed selectivity toward Cr3+ in MeCN by color changing from pink to colorless with a blue shift of 125 and 165 nm, respectively. Both sensors form complex ML2 and ML with Cr3+​ in MeCN. Hg2+ also induced a large blue shift around 160 nm in the UV-Visible spectra of N1 and N2 in DMSO with color change from purple to colorless. The value of log K for ML complex of N2 with Hg2+ is equal to 5.97. The naked eye detection limit towards target ions are 0.09 and 0.27 ppm for N1 and N2 for Cr3+ in MeCN, and 0.90 and 1.40 ppm for N1 and N2 for Hg2+ in DMSO. This low detection limit for Cr3+ could be used to monitor Cr3+ that bring acute toxic to aquatic life. Furthermore, N1 and N2 showed selectivity towards F– and  in both MeCN and DMSO: F– could induce a color change of N1 from pink to purple in MeCN and from purple to blue in DMSO as a result of a red shift of 50-60 nm.  H2PO4- also induced a color change from pink or purple to colorless with a 130-160 nm blue shift. Thus N1 and N2 could be potentially employed as chromogenic sensors for both metal ions such as Cr3+ and Hg2+ and anions like F– and H2PO4-.
Adsorption and conversion of small gases on TiO2 nanoparticles and surfaces of modified TiO2
Authors:   , Pipornpong Waranyu
Published: November 2023

Adsorptions of small gases and their reactions on modified anatase TiO2 (001) as ZnOSL supported on anatase TiO2 (001), (ZnOSL/TiO2), and Mn–doped TiO2 (001) surfaces have been studied by density functional theory (DFT) method. The calculation models relied on both of clusters and periodic boundary conditions (PBCs). It was found that Ti5C and O2c sites on anatase TiO2 (001) are active for ZnOSL supporting. The conversion of carbon monoxide by oxygen forming carbon dioxide gas over the ZnOSL/TiO2 composite was studied. Moreover, ZnOSL, transition metals, and non–metals doped–ZnOSL clusters have studied to understand the properties of their surfaces. Resulting from the study of small gases on the Sc–ZnOSL, the most stable adsorption configuration is SO2 adsorption. The most decreasing of energy gap for N2O bridge–structured adsorption on Sc–ZnOSL was found. The Sc–ZnOSL used as N2O or SO2 sensing material was suggested. For the system of Mn–doped anatase (001) surface, Mn–doped anatase (001) surface enhances the activity of O2 pre–adsorption and CO adsorption for CO to CO2 conversion. Therefore, the results indicate that modified anatase (001) surface can be used for the conversion of carbon monoxide by oxygen gas forming carbon dioxide gas reaction.
AN OBSERVATION OF REVERSE MOUNTING BY THE SPOT-WINGED PIGEON PATAGIOENAS MACULOSA
Authors: Bosque Carlos
Published: November 2023

Reverse mounting, females mounting males, is a widespread but uncommonly reported behaviour among birds. Although its function is not fully understood, it is generally accepted that reverse mounting is an integral part of courtship during pair bonding and mating. It has been reported in species of at least 10 orders, but only among three species of columbids previously. Here, I report a casual observation of reverse mounting by two individuals of Spot-winged Pigeons Patagioenas maculosa in the vicinity of the city of Córdaba, Argentina. Components of the display observed in the copulatory sequence of the pair, are frequent in the repertoire of displays during mating and courtship of columbids; yet, reverse mounting is seldom described. These observations support and extend the occurrence of reverse mounting in pigeons.
LABOR INTENSITY, ADVERTISING INTENSITY, AND FIRM PERFORMANCE: EVIDENCE FROM MERGERS & ACQUISITIONS
Authors: Tarannum Ishrat , Hasan Nazmul , Hasan Fuad , Bhuyan Rafiqul
Published: November 2023

This study examines the relation between a firm’s labor intensity and its operating performance. Using a large sample of US public firms from the period 2001 to 2018, we find that firms with a higher level of labor intensity are less likely to engage in mergers & acquisitions (M&As) activities. Our main finding suggests that a firm’s operating performance, proxied by return on assets and return on equity, decreases with a higher level of labor intensity. Further analysis shows that if labor-intensive firms engage in M&As, they are less likely to use cash and stock as payment methods and consider the target’s legal forms of business orientation. The negative relation between labor intensity and firm performance is aggravated (attenuated) by the firm’s advertising intensity (stock payment method and private target of potential M&A characteristics). Finally, labor productivity is also negatively associated with labor intensity.
EVALUATION OF A SUMMER COURSE IN ENTREPRENEURSHIP FOR DISADVANTAGED HIGH SCHOOL STUDENTS
Authors: Michael Dominik  , Joel Rudin  , Faye X. Zhu  , Straso Jovanovski
Published: November 2023

This paper overviews a pre-college entrepreneurial education program and examines its impact on entrepreneurial intention. The program, entitled the Think Like an Entrepreneur Summer Academy, aims at disadvantaged and underrepresented high school students and is developed by a public research university in the northeast USA. We analyzed the data from 154 graduates of the program and found a significant increase in entrepreneurial intention in the posttest compared to the pretest. The study adds to the literature on exploring and identifying the characteristics of pre-college entrepreneurial education interventions that help increase entrepreneurial intent and provides suggestions for future research, including comparing dropouts to graduates and exploring the interplay between entrepreneurial intention and entrepreneurial mindset.
CLIMATE CHANGE RISK DISCLOSURE AND ACCOUNTING CHOICE: EVIDENCE FROM U.S. OIL AND GAS COMPANIES
Authors: Joanna (Jingwen) Zhao  , Xinruo Wang  , David C. Yang
Published: November 2023

Focusing on U.S. oil and gas companies following the SEC’s investigation of ExxonMobil’s climate risk issues, this study investigates the impact of climate change risk (CCR) disclosure on corporate accounting choices. After examining U.S. oil and gas firms’ 10-K filings, carbon disclosure project (CDP) reports, and multi-source corporate sustainability reports, we find a positive association between CCR disclosure and the full cost (FC) accounting choice, designating that oil and gas firms with greater CCR disclosures are more likely to adopt the FC method to record oil and gas exploration activities. Our study responds to the SEC’s2010 and 2022 Climate Change Disclosure Guidance and encourages more oil and gas companies to disclose CCR and its impact on financial reporting to facilitate transparent transitions towards a low-carbon economy.
Identifikasi Kelimpahan Mikroplastik pada Air Permukaan Outlet Limbah Pabrik Kertas di Hilir Sungai Brantas
Authors: Maulidah Lilik , Rafika Aprilianti  , Akhmad Farid
Published: November 2023

Limbah cair pabrik kertas menurunkan kualitas air sungai brantas. Bahan baku plastik pada proses produksi akan terfragmentasi menjadi mikroplastik. Tujuan penelitian untuk menganalisa bentuk, warna, dan kelimpahan mikroplastik pada outlet limbah pabrik kertas di hilir Sungai Brantas. Penentuan lokasi dengan metode purposive sampling. Pengambilan sampel air di empat lokasi pabrik kertas menggunakan mistic scan dan filter stainless sebanyak 100 L. Sampel yang telah didapatkan kemudian dipreparasi menggunakan H2O2 20 ml dan Fe2SO4 5 tetes.  Kelimpahan mikroplastik pada outlet limbah PT. Adiprima Suraprinta sebanyak 10,75 partikel/liter, sedangkan terendah pada sebelum outlet PT. Dayasa Aria Prima 1,78 partikel/liter. Bentuk pada sampel ini tertinggi yakni filamen 49%, fragmen 27%, dan fiber dengan 24%. 97% air di Kali Surabaya sebagai bahan baku PDAM Surya Sembada. Pemerintah harus lebih tegas dan menindak industri yang membuang limbahnya langsung kesungai.
Validação de tecnologia educativo-terapêutica aplicada à criança com diabetes mellitus tipo 1: protocolo institucional padrão
Authors: Dutra Aline Reis Brasão , Alves Lorena Oliveira , Avendano Renata de Moraes Oliveira , Melo Manuela Costa
Published: November 2023

Objetivo: desenvolver, validar e implementar tecnologia educativo-terapêutica, no formato de protocolo institucional padrão, destinada ao cuidado da criança com diabetes mellitus tipo 1. Método: estudo metodológico, realizado em hospital público no Distrito Federal, participaram sete enfermeiros na validação, cinco crianças e familiares, na implementação, entre agosto/2021 e outubro/2022. Realizou-se validação de maneira on-line, utilizado instrumento de escala do tipo Likert e análise pelo Índice de Validade de Conteúdo e Coeficiente de Correlação Intraclasse. Na sessão educação em saúde, de maneira presencial, foram realizadas entrevistas e anotações no diário de campo. Resultados: tecnologia elaborada apresentou assuntos relacionados aos cuidados diários de crianças e à doença diabetes mellitus. A validação alcançou um índice de concordância de 0,78%, coeficiente de correlação de 0,525. A implementação identificou potencialidades e fragilidades relacionadas no cuidado da saúde. Conclusão: considerou-se o protocolo abrangente, promovedor na adesão ao tratamento subsidiando cuidado com qualidade e segurança.
Futuristic Trends in Nanomaterials
Authors:   PVKK Institute of Technology, Anantapur, Andhra Pradesh, India., Reddy Dr. Y. Santhosh Kumar , Reddy Dr. K. Manohar ,   PVKK Institute of Technology, Anantapur, Andhra Pradesh, India., Vardhan Dr. D. Harsha ,   PVKK Institute of Technology, Anantapur, Andhra Pradesh, India
Published: November 2023

The purpose of this book is to provide a forum for renowned academic scientists, researchers, and intellectuals to discuss all facets of Chemical, Material Sciences, and Nanotechnology. In addition, it serves as a leading multidisciplinary forum in which experts in the area of Nano technology may share their findings on the latest developments in the field, as well as the obstacles they've faced and the ways they've overcome them. The advancement of Nano technology has contributed greatly to the betterment of human existence and to the growth of many scientific and technological disciplines. To offer a unique forum for the academic, scientific, and industrial communities to address new difficulties, exchange answers, and explore future research directions, the book will centre on cutting-edge innovations and developments in Nano technology.
Building a Cultural Model of Excellent Service at the Polytechnic Pelayaran Surabaya in welcoming the era of Society 5.0
Authors: Rahayu Trisnowati , Dahri Muhammad , Nugraha Bugi
Published: November 2023

Polytechnic Pelayaran Surabaya (POLTEKPEL) in 2019, As part of government services that have successfully gained recognition as a Zone of Integrity Free from Corruption (WBK), this agency continues to take steps to achieve the title of Clean and Serving Bureaucratic Area (WBBM), in accordance with the concepts of bureaucratic reform and good governance. After experiencing a period of becoming a WBK predicate from 2019 to mid-2023, Surabaya Poltekpel continues to develop and create new innovations so that it can achieve the WBBM title and build a culture of excellent service in welcoming the era of Society 5.0.The type of research used in this study is Mixed methods research, This research adopts a Mixed Methods Research approach that combines quantitative and qualitative methods in the process of data collection and analysis. This approach provides assumptions that make it possible to direct how to obtain data from both types of approaches. The results showed that there was a change in the mindset of public services towards the era of Society 5.0, Public services by utilizing technology that can improve the quality and efficiency of services provided.in the Surabaya Poltekpel institution environment has been implemented E-OFFICE,  Innovative Service: by developing innovation in providing better and more effective services, and the existence of data-based services and information openness so that it is necessary to create a model to build a culture of excellent service at the Surabaya Shipping Polytechnic, in welcoming the era  of Society 5.0
Breakthrough Stem Cells Therapy For Children With Autism
Authors:   ell Tech Stem Cell Centre Laboratory & Banking, Jakarta, Indonesia, Susanti Vinsk Deby , Cinta Vinski Natasha ,   Cell Tech Stem Cell Centre Laboratory & Banking, Jakarta, Indonesia
Published: November 2023

A stem cell is a pluripotent cell, a cell that develop into other types of cells. These results suggest that stem cells may be employed to regenerate neurons and repair damaged ones. Several animal studies have shown that stem cell treatment can reduce autistic-like behaviour. One study indicated that stem cell treatment helped autistic rodents engage in less repetitive activity and have more positive social interactions. The outcomes of the first human clinical studies were likewise promising. One study found that teenagers on the autism spectrum were able to communicate better after receiving stem cell treatment. It’s important to remember, though, that studies of stem cell treatment for ASD are just getting started. More studies on the efficacy and safety of stem cell treatment in people are needed. Ethical considerations must also be considered before stem cell treatment is extensively employed to treat ASD.
SOLOZÁBAL ECHEVARRÍA, Juan José (2004). Nación y Constitución. Soberanía y autonomía en la forma política española. Madrid: Biblioteca Nueva
Authors: Seseña Santos Laura
Published: November 2023

Recensión de la obra: SOLOZÁBAL ECHEVARRÍA, Juan José (2004). Nación y Constitución. Soberanía y autonomía en la forma política española. Madrid: Biblioteca Nueva.
Prerrogativas parlamentarias y Tribunal Constitucional
Authors: Rosado Iglesias Gema
Published: November 2023

Sumario: I. CONSIDERACIONES PREVIAS: EN GENERAL SOBRE LA FISCALIZACIÓN DE LA ACTIVIDAD PARLAMENTARIA.—II. SENTIDO ACTUAL DE LAS PRERROGATIVAS PARLAMENTARIAS: CONFIGURACIÓN CONSTITUCIONAL E INTERPRETACIÓN DEL TRIBUNAL CONSTITUCIONAL.—2.1. Interpretación institucional, funcional, no individual de las prerrogativas, su justificación constitucional: la protección, la salvaguarda de la institución.—2.2. Interpretación restrictiva de las prerrogativas, reductora de privilegios y protectora de derechos.—2.3. Interpretación en ocasiones invasora de competencias parlamentarias y en otras apegada en exceso al texto normativo.—III. INVIOLABILIDAD.—3.1. Delimitación funcional: la actividad parlamentaria.—3.2. Delimitación material: opiniones.—IV.INMUNIDAD.—4.1. La exigencia de motivación del acuerdo de la Cámara que resuelve sobre la concesión o denegación del suplicatorio.—4.2. La denegación del suplicatorio implica el sobreseimiento libre de la causa, pero ¿por qué no provisional?—V.AFORAMIENTO.
Etiology of impacted permanent maxillary canines. A review.
Authors:   Czech Orthodontic Society, Kloudová Dana , Horáček Martin
Published: November 2023

The presented article presents a comprehensive survey of current knowledge on impacted maxillary canines with focus on palatal impaction. We worked with the relevant databases and eventually selected the 94 most important studies and monographies. In case of vestibular impaction the literature more or less agrees on that the main cause is the lack of space in the dental arch. However, in case of palatal impaction the situation is not so clear. In etiology of palatal impaction there prevail two opinions: genetic theory and guidance theory. Genetic theory sees genetics as the only cause, while guidance theory says impacted canine is the result of deviations in the shape of upper lateral incisor – agenesis, microdontia, peg shaped crown. Thus, lateral incisor cannot take on the role of guiding crest along which canine erupts into the oral cavity. Other potential causes include local obstruction, pathologies, traumas. However, they appear in only a minimum of cases.