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Adding chitosan nanoparticles of green tea extract in diluent and thawing temperatures ameliorate the post-thawed quality of Boer buck semen

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Asian pacific Journal of Reproduction 2024年第1期13卷 42-48页

作者： Suherni Susilowati Imam Mustofa Tri wahyu Suparyogi Adeyinka Oye Akintunde Djoko Agus Purwanto Wurlina Wurlina Suzanita Utama Sri Mulyati Division of Veterinary Reproduction Faculty of Veterinary MedicineUniversitas AirlanggaKampus C UnairMulyorejoSurabaya 60115Indonesia Department of Agriculture and Industrial Technology Babcock UniversityIlishan-RemoOgun State 121103Nigeria Department of Pharmaceutical Chemistry Faculty of PharmacyUniversitas AirlanggaKampus C MulyorejoSurabaya 601155East JavaIndonesia

Objective:To improve the quality of post-thawing Boer buck semen for artificial insemination by adding green tea extract chitosan nanoparticles to skimmed egg yolk diluent,and the proper thawing ***:The ejaculate of Boer buck was added to skimmed egg yolk diluent without(the control group)and with adding 1μg of chitosan nanoparticles of green tea extract per mL of diluent(the treatment group).Then,the diluted semen was filled in French mini straws containing 60×106 live sperm per straw,frozen in a standard protocol,and stored as frozen semen at−196℃for a *** replicates from each group were diluted for 30 s at 37℃or 39℃sterile water to evaluate the semen ***:Post-thawing(at 37℃or 39℃)of live sperm,progressive motility,and plasma membrane integrity were lower compared to those of the pre-freezing stage(P0.05).The live sperm,progressive motility,and plasma membrane of the treatment group in the pre-freezing stage,and post-thawed at 39℃were higher compared to those of the control group(P0.05).Conclusions:Higher quality post-thawing Boer buck semen is achieved by adding 1μg/mL of chitosan nanoparticles of green tea extract to the skimmed egg yolk diluent and thawing at 39℃.

关键词： Boer buck semen Chitosan nanoparticles Semen diluent Higher post-thawing semen quality Prevent undernutrition

Genetic algorithm tuned PI controller on PMSM simplified vector control

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Journal of Central South University 2013年第11期20卷 3042-3048页

作者： wibowo wahyu kunto JEONG Seok-kwon Mechatronics Engineering Pukyong National University Refrigeration and Air-Conditioning Engineering Pukyong National University

A simple control structure in servo system is occasionally needed for simple industrial application which precise and high control performance is not exessively important so that the cost production can be reduced *** vector control,which has simple control structure,is utilized as the permanent magnet synchronous motor control algorithm and genetic algorithm is used to tune three PI controllers used in simplified vector *** control performance is obtained from simulation and investigated to verify the feasibility of the algorithm to be applied in the real *** results show that the speed and torque responses of the system in both continuous time and discrete time can achieve good ***,simplified vector control combined with genetic algorithm has a similar performance with conventional field oriented control algorithm and possible to be realized into the real simple application in the future.

关键词：永磁同步电机 PI控制器遗传算法矢量控制调整控制性能工业应用控制结构

An agent-based model of agricultural land expansion in the mountain forest of Timor Island,Indonesia

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Journal of Mountain Science 2024年第7期21卷 2263-2282页

作者： PUJIONO Eko SADONO Ronggo IMRON Muhammad Ali SUTOMO JANUAR Hedi Indra KUSWANDI Relawan KURNIAWAN Hery HADI Etik Erna Wati SAPUTRA Muhammad Hadi HIDAYAH Izhamil HUMAIDA Nida SUKMAWATI Jalma Giring HADIYAN Yayan NUGROHO Agung wahyu HANI Aditya Research Center for Ecology and Ethnobiology National Research and Innovation Agency Republic of Indonesia(BRIN)Jl.Raya Jakarta-Bogor KM.46CibinongBogor 16911Indonesia Faculty of Forestry Gadjah Mada UniversityJl.Agro No.1Yogyakarta 55281Indonesia

The Mutis-Timau Forest Complex,located on Timor Island,Indonesia,is a mountainous tropical forest area that gradually decreases due to deforestation and forest *** modelling studies based on patterns indicate that deforestation primarily occurs at lower elevations and near the boundaries of forests and settlements,often associated with shifting cultivation by local *** study adopts a process-based modelling approach,specifically the agent-based model,to simulate land changes,particularly farmers'expansion of agricultural land around the Mutis mountain *** underlying concept of this agent-based approach is the interaction between the human and environmental ***,representing the human system,interact with the land,which represents the environmental system,through land use decision-making *** research was conducted in the Community Forest of the Timor Tengah Utara District,one of the sites within the Mutis-Timau Forest Complex with the highest deforestation *** use change simulations were performed using agent-based modelling from 1999 to 2030,considering the socio-economic conditions of farmers,spatial preferences,land use decisions,and natural *** results revealed that the agricultural area increased by 14%under the Business as Usual scenario and 5%under the Reducing Emission from Deforestation and Forest Degradation scenario,compared to the initial agricultural area of 245 *** probability of farmers deciding to extend agricultural activities was positively associated with the number of livestock maintained by farmers and the size of the village ***,the likelihood of farmers opting for agricultural extensification decreased with an increase in the area of private land and the farmer's *** findings are crucial for the managers of the Mutis-Timau Forest Complex and other relevant stakeholders,as they aid in arranging actions to combat deforestation,designing proper fore

关键词： Agricultural land expansion Simulation Agent-based model Farmer Deforestation Mountainous tropical forest

Ionic liquids as boundary additives in water-based and PAO lubricants

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Friction 2022年第9期10卷 1405-1423页

作者： wahyu WIJANARKO Hamid KHANMOHAMMADI Nuria ESPALLARGAS Norwegian Tribology Center Department of Mechanical and Industrial EngineeringNorwegian University of Science and Technology(NTNU)Trondheim 7491Norway Department of Mechanical Engineering Sepuluh Nopember Institute of Technology(ITS)Surabaya 6011Indonesia

Ionic liquids have been widely discussed as potential lubricants,however,their properties make them also very good potential candidates as lubricant additives(e.g.,friction modifiers and anti-wear).In this work,the tribological study of two ionic liquids(tributylmethylphosphonium dimethylphosphate(PP),and 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate(BMP))as lubricant additives has been performed on stainless steel(AISI 316L)exposed to polar(water-glycol)and non-polar(polyalphaolefin)based lubricants under boundary lubricating *** performance of these ionic liquids as lubricant additives has been compared to a classical organic friction modifier(dodecanoic acid(C12)).The water–glycol lubricant formulated with the two ionic liquids showed friction values higher than the same base lubricant formulated with dodecanoic acid,however,opposite results were observed for polyalphaolefin(PAO).A detailed surface chemical analysis using X-ray photoelectron spectroscopy(XPS)revealed differences in the passive/tribofilm thickness and chemical composition of the stainless steel surface tested in all *** the case of the polar lubricant additivated with ionic liquids,the tribochemical reaction accompanied by a tribocorrosion process led to the formation of an unstable passive/tribofilm resulting in high friction and ***,in the absence of tribocorrosion process(polyalphaolefin base lubricant),the tribochemical reaction led to the formation of a stable passive/tribofilm resulting in low friction and wear.A detailed surface and subsurface investigation of the microstructure using scanning electron microscopy equipped with a focused ion beam(SEM-FIB)showed that high wear rates resulted in thicker recrystallization region under the wear track *** all lubricant additives tested in this work,BMP in non-polar lubricant media showed the best tribological performance.

关键词： water lubricant polyalphaolefin(PAO) ionic liquids tribochemistry tribocorrosion tribofilm

Techno-economic analysis of a hybrid renewable energy system integrated with productive activities in an underdeveloped rural region of eastern Indonesia

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Clean Energy 2023年第6期7卷 1247-1267页

作者： Alya Nurul Shafira Subhan Petrana Rahma Muthia Widodo wahyu Purwanto Sustainable Energy Systems and Policy Research Cluster Universitas IndonesiaDepok16424Indonesia Chemical Engineering Department Faculty of EngineeringUniversitas IndonesiaDepok16424Indonesia Master Program in Energy Systems Engineering Faculty of EngineeringUniversitas IndonesiaDepok16424Indonesia

The Southwest Maluku region in eastern Indonesia is considered a frontier,outermost and underdeveloped *** inhabitants live on isolated islands,including the residents of Mahaleta Village,where only 9.4%of the community have limited access to *** study aimed to design an economically feasible hybrid renewable energy(RE)system based on solar and wind energy to integrate with the productive activities of the *** study developed conceptual schemes to meet the demand for electricity from the resi-dential,community,commercial and productive sectors of the *** analysis was performed using a techno-economic *** hybrid system was designed using the HOMER Pro optimization function,and cold-storage and dryer systems were designed to support related productive *** optimized design of the hybrid RE system comprised 271.62 kW of solar photovoltaics,80 kW of wind turbines and a 1-MWh lead-acid *** found that the hybrid RE system would only be economically feasible with a full-grant incentive and an electricity tariff of$0.0808/***,the productive activity schemes were all economically feasible,with a cold-storage cost of$0.035/kg and a drying cost of$0.082/*** the hybrid RE system with productive activities can improve the economic feasibility of the energy system and create more jobs as well as increase income for the local community.

关键词： underdeveloped region hybrid renewable energy system photovoltaics wind turbine Indonesia

An Improvement in Power Quality and By-Product of the Run-Off River Micro Hydro Power Plant

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Energy Engineering 2023年第6期120卷 1295-1305页

作者： Ignatius Riyadi Mardiyanto Jangkung Raharjo Sri Utami wahyu Budi Mursanto Agoeng Hardjatmo Rahardjo Department of Energy Conversion Bandung State of PolytechnicBandung40559Indonesia School of Electrical Engineering Telkom UniversityBandung40257Indonesia

Utilization of Micro Hydro Power Plant at the Gunung Halu case study type run-off the river is a household use only in the afternoon,around 5 pm until bedtime at about 10 ***,more than 75%of the energy is *** case study lost power which can be used as a by-product,such as for drying coffee *** this case study,a design was carried out to obtain by-products and improve power quality in the electrical *** addition,they complain about the poor quality of power controlled by frequency using Triac-Based Electronic Dummy Load *** heat from the dummy load in the case study is used as a *** with a minimum power of 20 kW,and the usage time of customer service is about 6 *** energy for the by-products is about 360 kWh/day,and the power quality improved by using Triac-Based Electronic Load Control and Hysteresis Current Control for the active *** a result,the power factor is close to one,the generator current harmonics is less than 2%,and the voltage harmonics is less than 5%.

关键词： Electronics load controller triac-based hysteresis current control power quality micro-hydro power

Solubility enhancement of ethyl p-methoxycinnamate under nanoscale confinement

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Journal of Chinese Pharmaceutical Sciences 2022年第6期31卷 461-470页

作者： Revika Rachmaniar Dolih Gozali Camellia Panatarani wahyu Priyo Legowo Sohadi Warya Taofik Rusdiana Department of Pharmaceutics and Pharmaceutical Technology Faculty of PharmacyUniversitas PadjadjaranJl.Raya Bandung-Sumedang KM 21Jatinangor 45363West JavaIndonesia Pharmaceutical Development Study Centre Faculty of PharmacyUniversitas PadjadjaranJl.Raya Bandung-Sumedang KM 21Jatinangor 45363West JavaIndonesia Department of Physics Faculty of Mathematics and Natural SciencesUniversitas PadjadjaranJl.Raya Bandung-Sumedang KM 21Jatinangor 45363West JavaIndonesia Functional Nano Powder University Center of ExcellenceUniversitas PadjadjaranJl.Raya Bandung-Sumedang KM 21Jatinangor 45363West JavaIndonesia Department of Pharmaceutics Indonesian School of PharmacyJl.Soekarno-Hatta No.354Bandung 40266West JavaIndonesia

The low solubility of ethyl p-methoxycinnamate(EPMC)inhibits its absorption in the gastrointestinal tract,impairing its pharmacological *** solubility of EPMC can be increased by utilizing a carrier in the type of mesoporous silica nanoparticles(MSN).In the present study,we aimed to confine EPMC under the nanoscale of MSN(MSN-EPMC)to increase the water solubility of *** was prepared using sodium silica as a precursor and Tween 80 and Span 80 as ***,500 mg MSN was dispersed into 2%w/v EPMC solution,stirred at 100 r/min for 24 h,and dried at 60℃.The results showed that the MSN formed had a particle size of 87.1305 nm,a surface area of 68.86 m;/g,a pore diameter of 20.45 nm,and a pore volume of 0.352 cm;/*** was successfully confined under the nanoscale of ***-EPMC had an amorphous structure,a loading capacity of 10.6%,and a loading efficiency of 18.18%.The solubility of MSN-EPMC was increased by 2.63 folds at 30 min compared with *** amorphous structure of MSN-EPMC was responsible for the enhancement of the water *** could be concluded that the confining of EPMC in MSN had the potential to increase the solubility of a water-soluble isolate of a plant.

关键词： Solubility Ethyl p-methoxycinnamate Mesoporous silica nanoparticles

Characterization of Nanocomposite Membrane Based Bacterial Cellulose Made of Pineapple Waste Reinforced by Graphite Nanoplatelets

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Journal of Renewable Materials 2022年第9期10卷 2465-2475页

作者： Heru Suryanto Bili Darnanto Susilo Jibril Maulana Aminnudin Uun Yanuhar Surjani Wonorahardjo Husni wahyu Wijaya Abu Saad Ansari Center of Excellence for Cellulose Composite(CECCom) Department of Mechanical EngineeringUniversitas Negeri MalangMalang65145Indonesia Centre of Advanced Material for Renewable Energy(CAMRY) Universitas Negeri MalangMalang65145Indonesia Master Program of Mechanical Engineering Faculty of EngineeringUniversitas Negeri MalangMalang65145Indonesia Department of Aquatic Resources Management Faculty of Fisheries and Marine SciencesBrawijaya UniversityMalang65145Indonesia Department of Chemistry Faculty of Mathematics and Natural SciencesUniversitas Negeri MalangMalang65145Indonesia Department of Materials Science&Engineering Incheon National UniversityIncheon464-742South Korea

Waste is the main problem for the *** waste for various useful applications has a benefit for the *** work has been studied for handling pineapple peel waste to make composite film bacterial cellulose nanocomposite membrane(BCNM)with addition graphite nanoplatelet(GNP).The concentration of GNP in the membrane influence the membrane *** bacterial cellulose(BC)pellicle was synthesized by using media from pineapple peel waste *** pellicle is cleaned with water and NaOH solution to be free from *** is synthesized through the mechanical disintegration *** results of disintegration using high pressure homogenizer at 150 bar and five ***/GNP is synthesized with varying addition of GNP of 2.5,5.0,10 and 100 wt%of dry bacterial nanocellulose(BNC).The BC and GNP solution were dried in an oven for 14 h at 80℃.BCNM morphology was observed using *** is dispersed and distributed in the BC matrix as *** analysis shows many peaks of BNC less pronounced with increasing of *** higher concentration of GNP,the rougher of *** optimum tensile strength of BCNM was achieved after addition GNP of 2.5 wt%.

关键词： Bacterial nanocellulose graphite nanoplatelet membrane nanocomposite pineapple waste

Selective microwave absorption in Nd3+ substituted barium ferrite composites

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Journal of Rare Earths 2019年第12期37卷 1320-1325页

作者： wahyu Widanarto Siti Khaeriyah Sib Krishna Ghoshal Candra Kurniawan Mukhtar Effendi wahyu Tri Cahyanto Department of Physics FMIPAUniversitas JenderalSoedirmanJL dr.Soepamo 61Purwokerto53123Indonesia Department of Physicsand Laser Centre AMORGFaculty of ScienceUniversiti Teknologi MalaysiaJohor BahruSkudai81310Malaysia Research Center for Physics Indonesian Institute of Sciences(LIPI)Puspiptek Office AreaSouth TangerangBanten15314Indonesia

Microwave(MW)frequency based wireless communications and electronic devices became prospective due to several *** meet this need,a series of neodymium ions(Nd3+)substituted barium ferrite composites with composition(20)BaO:(80-x)Fe2 O3:(x)Nd2 O3(0≤x≤3 mol%)was prepared at1100℃using solid-state reaction *** evaluated the effect of various Nd3+ions contents on the surface morphology,structure,and magnetic properties of the as-synthesized barium ferrite ***,microwave reflection loss,complex permittivity and permeability were determined using the transmission/reflection line method in the X-band(8-12 GHz).SEM image of the composites shows that the surface morphology consists of rough and porous *** patterns of the un-doped composites reveal the existence of BaFe12O19(hexagonal)and Fe21.333O32(tetragonal)crystalline ***,a new hexagonal crystalline phase of Ba6 Nd2 Fe4 O15 with the crystallite sizes between 15 and 67 nm is observed due to Nd3+ions substitution in the *** saturation magnetization of the composite containing 2 mol%of Nd3+does not exhibit any significant alteration compared to the one devoid of Nd3+.The complex relative permitivity and permeability of the achieved composites enriched in Ba6 Nd2 Fe4 O15 and BaFe2 O4 phases disclose significant MW frequency *** composites also display selective MW absorption in the X-band which could be useful for diverse applications.

关键词： Neodymium doping Barium ferrite composites Magnetic properties Porosity MW reflection loss Rare earths