Article
Environmental Sciences
Nanik Retno Buwono, Yenny Risjani, Agoes Soegianto
Summary: The first investigation of microplastics in G. affinis from the Brantas River was conducted. Microplastics were found in higher concentrations downstream than upstream, with a positive relationship between microplastic particle concentration and fish length. The shape and color of microplastics varied at different sites.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Md Ashekur Rahman, Md Yeamin Hossain, Mostafa A. R. Hossain, Zoarder Faruque Ahmed, Ahmed Jaman, Jun Ohtomi
Summary: This study explored the effects of climate change on the reproductive activity of the monsoon river prawn in the Ganges River basin of Bangladesh. The study found a significant correlation between rainfall and the spawning season, with rainfall impacting the number of ovigerous females and fecundity. The findings suggest that the spawning season of the monsoon river prawn may shift due to climate change.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Pengfei Cai, Huwei Yuan, Zijian Gao, Hui Qiao, Wenyi Zhang, Sufei Jiang, Yiwei Xiong, Yongsheng Gong, Yan Wu, Shubo Jin, Hongtuo Fu
Summary: This study aimed to investigate the potential of dietary supplementation with 17 beta-estradiol (E-2) in inducing sex reversal in prawns. By performing gonadal transcriptome analysis, it was found that E-2 supplementation resulted in the highest female to male sex ratio of 2.22:1. Key pathways for sex reversal and sperm maturation were identified, and genes related to reproduction were found to be differentially expressed in the process of sex reversal. This study provides valuable evidence for the establishment of monoculture in this species.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Fisheries
Tran Huu Phuc, Nguyen Thanh Vu, Nguyen Thi Kieu Nga, Nguyen Trung Ky, Nguyen Hong Nguyen
Summary: This study analyzed a large dataset from a pedigreed giant freshwater prawn population over nine years to evaluate genetic progress for body weight and examined genetic changes in body dimensions and fitness related traits. The heritabilities for body weight and body dimensions were moderate, while estimates for early maturity and small blue claw male were low. Positive genetic correlations were observed among body traits, but negative genetic correlations were found with early maturity and small blue claw male. Genetic gain for body weight over eight generations was significant, but selection for high growth did not negatively impact other traits. The selection line showed substantial improvement in body weight compared to the founder stock from Mekong river.
Article
Agriculture, Dairy & Animal Science
Gang Jiang, Yucai Xue, Xuxiong Huang
Summary: This study investigated the differences in folic acid utilization between male and female prawns by providing three experimental diets with varying folic acid contents. The results showed that a folic acid content of 1.22 mg/kg in the diet resulted in the best body weight gain, growth rate, and individual weight for both male and female prawns. Male prawns had decreased protein content in their bodies when fed diets with folic acid content above 1.22 mg/kg, while no significant differences were observed in females. High folic acid content in the diet significantly improved the protease activity in the hepatopancreas of female prawns, but the highest protease activity was observed in male prawns fed with a diet containing 1.22 mg/kg folic acid. Increasing folic acid levels did not suppress early maturation but instead increased the fecundity of females, and it also improved the thermal stress tolerance in both males and females.
Article
Endocrinology & Metabolism
Hai-Jing Xu, Yi-Lai Chen, Yong-Mei Wang, Jing-Yu Luo, Jian-Wen Li, Shuai-Qi Shen, Jin-Shu Yang, Wen-Ming Ma
Summary: In this study, the complete and functional sex reversal was achieved by knocking down the MroDmrt11E gene in male prawns, resulting in the production of an all-male monosex population. Comparative transcriptomic analysis provided new insights into the genes involved in sexual differentiation affected by MroDmrt11E knockdown. The study also investigated the potential roles of MroDmrt11E in male sexual differentiation and analyzed the molecular regulatory relationships of candidate genes related to sexual differentiation.
FRONTIERS IN ENDOCRINOLOGY
(2022)
Article
Environmental Sciences
Shengming Sun, Yiting Jin, Penghui Luo, Xiaotao Shi
Summary: Microplastics, especially polystyrene microplastics, have negative effects on the male reproductive system and larval immunity of freshwater prawns. These effects include decreased survival rate, heart rate, hatching success, and immune enzyme activities. The exposure to PS-MPs also disrupts testicular function, sex hormone balance, and gene expression.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Mariia Chukaeva, Denis Petrov
Summary: The aim of this study was to analyze the content of heavy metals in the shells of freshwater gastropods Viviparus sp., evaluate the correlation of trace element accumulation in biological objects, bottom sediments, and water, and assess the pollution level of minor rivers in St. Petersburg. The data obtained showed contamination of the Neva River Delta with metals such as Al, Mn, Fe, Cu, and Pb, and significant accumulative capacity of bottom sediments with Zn, Pb, Ni, Cu, Mn, and Fe. The gastropods exhibited a high bioaccumulation ability, depending on the properties of metals, river hydrology, and sediment characteristics. Sr, Fe, Cr, and Mn were found to have the best ability to bioaccumulate in gastropod shells.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Chun-dan Gan, Mu-yi Peng, Heng-bo Liu, Jin-yan Yang
Summary: This study investigated the spatial and vertical distribution of PFAS in different areas of an industrial city. The results showed higher concentrations of PFAS in farmland soils, indicating the impact of soil tillage. PFAS were found at higher levels in the shallow layer of soil profiles, with long-chain PFAS remaining in the topsoil and short-chain PFAS migrating to deeper soil layers. The application of F-enriched phosphorus fertilizers and atmospheric deposition were identified as important sources of F and PFAS in the soil.
Article
Fisheries
Warachin Gangnonngiw, Malinee Bunnontae, Pattanapon Kayansamruaj, Saengchan Senapin, Jiraporn Srisala, Timothy W. Flegel, Kanokpan Wongprasert
Summary: A novel ssDNA virus, Macrobrachium hepatopancreatic bidnavirus (MHBV), was identified in giant freshwater prawn using metagenomic analysis and de novo assembly. This virus showed circular, eosinophilic inclusions in the nuclei of hepatopancreatic cells. The MHBV genome closely matched the polymerase B gene in the V1 fragment of Bombyx mori bidensovirus 2 (BmBDV2) and belongs to the family Bidnaviridae.
Article
Fisheries
Jonathan Molcho, Rivka Manor, Maayan Shamsian, Gurucharan Sudarshan, Rivka Ofir, Danit Parker, Simy Weil, Hanin Wattad, Emily Hayun, Tom Levy, Eliahu D. Aflalo, Ayal Hendel, Amir Sagi
Summary: This study successfully established two CRISPR platforms for the giant freshwater prawn Macrobrachium rosenbergii and achieved high gene editing efficiency through optimization. Editing efficiency was examined and reached as high as 100% in embryos, while the maximum efficiency obtained in primary embryonic cell cultures was 64%. Additionally, a striking difference in deletion patterns around the Cas9 cut site was observed between the two systems, indicating distinct repair mechanisms that require further clarification. The investigation of the Pax6 transcription factor provided a phenotypic proof of concept by showing clear effects on eye development in edited embryos and larvae. This study lays down the foundations for precise functional genomic research and genome editing applications in crustacean species for both aquaculture and sustainable biocontrol, offering opportunities for the creation of selected crustacean lines with distinct attributes.
Article
Fisheries
Jiangtao Ou, Xiaoqi Luan, Hao Chen, Keyan Zhou, Zisheng Wang, Hui Wang, Linlan Lv, Xuexing Dong, Weihong Zhao, Benhou Zhang, Qifan Zeng, Jingbo Liu
Summary: In this study, full-length transcriptome profiling revealed that 4 hub immune-related genes play a crucial role in the defense against S. eriocheiris infection in M. nipponense, with widespread expression in 6 tissues including gills. Silencing of these key immune-associated genes led to a significant reduction in bacterial clearance ability when M. nipponense was challenged by S. eriocheiris. These findings provide insights into the immune response mechanisms of M. nipponense against S. eriocheiris infection.
Article
Environmental Sciences
Qingqing Zhao, Junhong Bai, Yongchao Gao, Guangliang Zhang, Qiongqiong Lu, Jia Jia
Summary: The study identified contamination levels of multiple heavy metal elements in five wetland areas, showing higher concentrations in surface soils compared to deeper soils, with varying levels of pollution observed for Cd across the wetlands.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biology
Mengchao Wang, Shubo Jin, Shuai Liu, Hongtuo Fu, Yunfeng Zhao, Li Jiang
Summary: This study identified single-nucleotide polymorphisms (SNPs) that affect the growth and sex differentiation of Macrobrachium nipponense, providing assistance for genetic breeding. The study also found genetic correlations between growth and sexual traits, simplifying genetic selection for multiple traits. Significant SNPs associated with growth and sexual traits were detected through genome-wide association analysis. These results shed light on the genetic nature of growth and sex traits in Macrobrachium nipponense.
Article
Endocrinology & Metabolism
Nufar Grinshpan, Faiza A. A. Abayed, Melody Wahl, Hadas Ner-Gaon, Rivka Manor, Amir Sagi, Tal Shay
Summary: This study profiles the transcriptional changes associated with embryonic development and sexual differentiation in the giant freshwater prawn M. rosenbergii. It identifies co-expressed gene modules representing physiological processes in early embryonic development and hundreds of differentially expressed genes between sexes. The results provide insights for future studies on the embryonic development and sexual differentiation in M. rosenbergii.
FRONTIERS IN ENDOCRINOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Norhassanah Osman, Mohamad Fathi Mohamad Elias, Nasrudin Abd Rahim
Summary: This paper presents the design and validation of a three-level hybrid boost converter with output voltage regulation and capacitor balancing. By using a three-level T-type neutral-point-clamped inverter and a boost converter, combined with a PI controller and a bandless hysteresis controller, the performance and functionality of the converter are effectively controlled.
IETE JOURNAL OF RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Muhammad Shakeel Ahmad, M. M. Shahid, Syed Shahabuddin, Khadija Munawar, Nasrudin Abd Rahim, Waqar Ahmed
Summary: The study investigated the concentration effect of MoS2 on the catalytic activity of PANi-based CE for cost-effective replacement of TCO and Pt in DSSCs. The optimised PANi-7 wt% MoS2 nanocomposite CE exhibited a remarkable 9.02% efficiency, outperforming the traditional TCO-Pt CE-based DSSCs by 9.73%, providing a new solution for DSSC applications.
MATERIALS TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Md. Washim Akram, Muhammad Firdaus Mohd Zublie, Md. Hasanuzzaman, Nasrudin Abd Rahim
Summary: This article reviews worldwide building energy consumption, performance measuring systems and best practices, energy-saving techniques and policies. Measures such as double-glazed windows, underfloor air distribution, highly efficient electric motors, and variable speed drives can significantly reduce energy consumption in buildings. Proper maintenance of heating systems and the use of automatic HVAC control systems also prove to be effective in energy savings.
Article
Green & Sustainable Science & Technology
Ali Wadi Al-Fatlawi, Maher Ali Al-Baghdadi, Hossain Togan, Goodarz Ahmadi, Saidur Rahman, Nasrudin Abd Rahim
Summary: This study evaluates the wind energy potential and energy cost of various wind turbines in rural areas using wind data from five locations in Peninsular Malaysia. The results show that Mersing is the most viable site for wind turbines, while Sitiawan is the least viable site.
INTERNATIONAL JOURNAL OF RENEWABLE ENERGY DEVELOPMENT-IJRED
(2022)
Article
Green & Sustainable Science & Technology
Shoki Kosai, Sazalina Zakaria, Hang Seng Che, Md Hasanuzzaman, Nasrudin Abd Rahim, Chiakwang Tan, Radin Diana R. Ahmad, Ahmad Rosly Abbas, Katsuyuki Nakano, Eiji Yamasue, Wei Kian Woon, Ammar Harith Ahmad Amer
Summary: As the ownership of vehicles in Malaysia continues to rise, there is a need for effective strategies to reduce emissions from the road transport sector. This study compares the greenhouse gas emissions of different types of vehicles and powertrains in Malaysia, and finds that transitioning to electric vehicles can lead to a reduction in emissions, while biodiesel-fueled vehicles have higher emissions than petrol-fueled vehicles.
Review
Energy & Fuels
Mukhamad Faeshol Umam, Md Hasanuzzaman, Nasrudin Abd Rahim
Summary: This study reviews the development of the sheet and tube PVT system, finding that the ST-PVT system without glazing and with a serpentine collector offers the best thermal and electrical performance. Furthermore, the use of CuO/water nanofluid enhances the overall efficiency of ST-PVT, although it requires more pumping power.
Review
Energy & Fuels
Wan Afin Fadzlin, Md Hasanuzzaman, Nasrudin Abd Rahim, Norridah Amin, Zafar Said
Summary: Solar thermal is a renewable energy resource that contributes to energy supply and reduces greenhouse gas emissions. Solar water heating is a significant part of global solar thermal capacity, but it faces challenges and limitations. This review explores the challenges faced in the global domestic solar water heating industry and highlights the integration of thermal energy storage systems for improved collector performance. Many countries worldwide face similar challenges in solar water heating technologies and industry.
Article
Energy & Fuels
Radin Za'im, Jafferi Jamaludin, Yushaizad Yusof, Nasrudin Abd Rahim
Summary: This paper presents a new technique to mitigate the high voltage stress on the secondary gallium nitride (GaN) transistor in a high step-up flyback application. The technique achieves a 2.3-fold reduction in overshoot voltage stress percentage compared to conventional methods. This is significant for the application of GaN devices at high efficiency and hundreds of kHz switching frequency.
Review
Engineering, Electrical & Electronic
Asiful Habib, Muhammad Ammirrul Atiqi Mohd Zainuri, Hang Seng Che, Ahmad Asrul Ibrahim, Nasrudin Abd Rahim, Zuhair Muhammed Alaas, Mohamed Mostafa Ramadan Ahmed
Summary: Coreless axial-flux permanent-magnet (AFPM) machines have gained attention due to their coreless structure, which offers higher efficiency and lower cogging torque. However, limitations such as high leakage flux and weak mechanical structure hinder their wide application. This systematic review identifies key research areas in coreless AFPM, including the development of efficient designs for multiphase and multi-stage topologies, as well as lightweight rotor and stator structures.
IET ELECTRIC POWER APPLICATIONS
(2022)
Article
Energy & Fuels
Muhammad Firdaus Mohd Zublie, Md. Hasanuzzaman, Nasrudin Abd Rahim
Summary: Energy is crucial for modernization and social development, but its reliance on fossil fuels harms the environment. This study explores the potential energy-saving and solar photovoltaic energy of Politeknik Sultan Azlan Shah (PSAS), Malaysia. By assuming PSAS joins the Net Energy Metering program, a feasibility analysis reveals significant savings (RM 3,534,250) and carbon emission reduction (14,559,760 kg CO2) over a period of 20 years.
Article
Energy & Fuels
Mahdi Tousizadeh, Amirmehdi Yazdani, Hang Seng Che, Hai Wang, Amin Mahmoudi, Nasrudin Abd Rahim
Summary: In this paper, a fault-tolerant three-phase induction drive based on field-oriented control is studied. The limitations of FOC in flux-torque regulation from the controller perspective are elucidated, and an analytical approach is proposed. The proposed method is verified and compared through simulation and experiment, ensuring smooth operation in postfault mode.
Article
Thermodynamics
Athaya Fairuz, M. Faeshol Umam, M. Hasanuzzaman, N. A. Rahim, I. M. Mujtaba
Summary: The demand for clean water has increased significantly due to global population growth. This paper analyzes the energy, economic, and environmental performance of a photovoltaic-powered desalination system, showing that the system without battery storage is the most economically profitable and has the highest CO2 emissions avoidance.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Review
Chemistry, Multidisciplinary
Mohammad Faisal Akhtar, Siti Rohani S. Raihan, Nasrudin Abd Rahim, Mohammad Nishat Akhtar, Elmi Abu Bakar
Summary: Rising greenhouse gas emissions from fossil fuel-driven vehicles are causing environmental damage. Electric vehicles (EVs) have been proposed as a solution, particularly light electric vehicles (LEVs) with their potential in public transportation. To promote LEV adoption, robust charging systems are crucial. This paper reviews recent research on LEV charging techniques, focusing on DC-DC converter topologies in both on-board and off-board chargers. The review categorizes LEV charger DC-DC converters into isolated and non-isolated topologies and explores challenges and emerging trends in LEV charging.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Electrical & Electronic
Mohamad Fathi Mohamad Elias, Nasrudin Abd Rahim, Nur Farhana Rosli
Summary: This article introduces a three-phase hybrid multilevel inverter (MLI) with enhanced pulsewidth modulation (PWM) strategy. The proposed MLI combines the series connection of half-bridge and full-bridge for level generation and the T-type inverter for polarity generation. An enhanced PWM strategy reduces complexity and solves high-frequency switching transitions in the existing hybrid MLI modulation method. The proposed MLI can produce 11 levels of output voltage with reduced dc sources requirement. Detailed analyses cover circuit configuration, operating principles and modeling, PWM signals generation, output voltage characteristics, dynamic response, harmonics content, power loss, and voltage stress of power switches. Simulation and experimental results verify the operating principle and functionality of the proposed MLI.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Chemistry, Applied
Khishn Kumar Kandiah, Vengadaesvaran Balakrishnan, Amirul Syafiq, Nasrudin Abd Rahim, Adarsh Kumar Pandey, Yee Seng Tan, Sanjay J. Dhoble, Ramesh Kasi, Ramesh Subramaniam
Summary: In this study, different phosphor samples were prepared using the solid-state diffusion method with nano-calcium carbonate (CaCO3) as the base material and Dysprosium doped calcium borophosphate (CBP/Dy) as the dopant. The samples were examined using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and photoluminescence (PL) test. The results showed the crystalline formation, morphological behavior and vibration bonds of the synthesized CBP/Dy-doped CaCO3 powder samples.
PIGMENT & RESIN TECHNOLOGY
(2023)
