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Antioxidant Defense Mechanisms of Salinity Tolerance in Rice Genotypes

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Rice science 2017年第3期24卷 155-162页

作者： Mohammad golam KIBRIA Mahmud HOSSAIN Yoshiyuki MURATA Md.Anamul HOQUE Department of Soil Science Bangladesh Agricultural University Graduate School of Natural Science and Technology Okayama University

In order to elucidate the role of antioxidant responses in salinity tolerance in rice genotypes under salt stress, experiments were conducted using four rice varieties, including salt-sensitive BRRI dhan 28 and three salt-tolerant varieties BRRI dhan 47, BINA dhan 8 and BINA dhan 10. Thirty-day-old rice seedlings were transplanted into pots. At the active tillering stage(35 d after transplanting), plants were exposed to different salinity levels(0, 20, 40 and 60 mmol/L NaCl). Salt stress caused a significant reduction in growth for all the rice genotypes. Growth reduction was higher in the salt-sensitive genotype than in the salt-tolerant ones, and BINA dhan 10 showed higher salt tolerance in all measured physiological parameters. The reduction in shoot and root biomass was found to be minimal in BINA dhan 10. Chlorophyll content significantly decreased under salt stress except for BINA dhan 10. Proline content significantly increased in salt-tolerant rice genotypes with increased salt concentration, and the highest proline content was obtained from BINA dhan 10 under salt stress. Catalase and ascorbate peroxidase activities significantly decreased in salt-sensitive genotype whereas significantly increased in salt-tolerant ones with increasing salt concentration. However, salt stress significantly decreased guaiacol peroxidase activity in all the rice genotypes irrespective of salt tolerance. K^+/Na^+ ratio also significantly decreased in shoots and roots of all the rice genotypes. The salt-tolerant genotype BINA dhan 10 maintained higher levels of chlorophyll and proline contents as well as catalase and ascorbate peroxidase activities under salt stress, thus, this might be the underlying mechanism for salt tolerance.

关键词： antioxidant enzyme salinity chlorophyll content proline content K+/Na+ ratio rice

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A New Handover Management Model for Two-Tier 5G Mobile Networks

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Computers, Materials & Continua 2022年第6期71卷 5491-5509页

作者： Mohammad Arifin Rahman Khan Mohammed golam Kaosar Mohammad Shorfuzzaman Kire Jakimoski Department of Computer Science and Engineering Bangladesh UniversityDhaka1207Bangladesh Discipline of IT Media and CommunicationsMurdoch UniversityPerthWA6150Australia Department of Computer Science College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia Faculty of Informatics AUE-FON UniversitySkopjeRepublic of North Macedonia

There has been an exponential rise in mobile data traffic in recent times due to the increasing popularity of portable devices like tablets,smartphones,and *** rapid rise in the use of these portable devices has put extreme stress on the network service providers while forcing telecommunication engineers to look for innovative solutions to meet the increased *** solution to the problem is the emergence of fifth-generation(5G)wireless communication,which can address the challenges by offering very broad wireless area capacity and potential cut-power *** application of small cells is the fundamental mechanism for the *** use of small cells can enhance the facility for higher capacity and ***,it must be noted that small cells deployment will lead to frequent handovers of mobile *** the importance of small cells in 5G,this paper aims to examine a new resource management scheme that can work to minimize the rate of handovers formobile phones through careful resources allocation in a two-tier ***,the resource management problem has been formulated as an optimization issue thatwe aim to overcome through an optimal *** find a solution to the existing problem of frequent handovers,a heuristic approach has been *** solution is then evaluated and validated through simulation and testing,during which the performance was noted to improve by 12%in the context of handover ***,this model has been observed to be more efficient as compared to the existing model.

关键词： Two-tier mobile networks small cell densification management of mobility handover cost average throughput power consumption

Predictive Factors of Hyponatremia in Under-Five Severely Malnourished Children with Pneumonia Admitted to a Large Urban Hospital in Dhaka, Bangladesh: A Nested Case-Control Design

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Food and Nutrition Sciences 2013年第4期4卷 398-404页

作者： Cheryl Kay Zogg Tahmeed Ahmed Abu Syeed golam Faruque Sumon Kumar Das Gazi Imran mohammod Jobayer Chisti Centre for Nutrition & Food Security (CNFS) International Centre for Diarrhoeal Disease Research Bangladesh (icddrb) Dhaka Bangladesh Dhaka Shishu Hospital Dhaka Bangladesh Johns Hopkins Bloomberg School of Public Health Baltimore USA

Background: Hyponatremia is the most common electrolyte imbalance encountered in the management of diarrheal children. Common ramifications include cerebral edema and fatal outcomes. However, pediatric data remain lacking, particularly in developmental contexts where resources are limited and associated conditions like malnutrition and pneumonia are common. Aim: This study aimed to evaluate predicting factors associated with hyponatremia in children under five years of age with severe acute malnutrition (SAM) in Bangladesh. Methods: Using a nested case-control design, we compared clinical and laboratory characteristics of children with (n = 61) and without hyponatremia (n = 183) taken from a parent population of all children under five with SAM and clinical or radiological pneumonia admitted to Dhaka Hospital of icddr,b between April 2011 and June 2012 (n = 407). Results: Logistic regression analysis adjusting for potential confounders such as lack of breast feeding, duration of vomiting (days), and severe wasting revealed that older age (OR 1.05, 95%CI 1.02 - 1.07, p = 0.001) (5% increase in the relative odds of hyponatremia for each additional month of age), presence of diarrhea (OR 2.43, 95%CI 1.0 - 6.0, p = 0.05), and difficulty breathing (OR 1.52, 95%CI 1.0 - 2.05, p = 0.05) were significantly associated with hyponatremia. Conclusion: Our data suggest that older age, presence of diarrhea, and difficulty breathing in under-five children with SAM is independent predictors of hyponatremia. These findings underscore the importance of detecting simple clinical predictors early in order to facilitate appropriate management and to prevent potential ramifications of hyponatremia in SAM children, especially in resource-poor settings.

关键词： Children Diarrhea Hyponatremia Malnutrition Pneumonia

Selective superoxide radical generation for glucose photoreforming into arabinose

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Journal of Energy Chemistry 2022年第11期31卷 324-331,I0009页

作者： Jiu Wang Heng Zhao Peng Liu Nael Yasri Na Zhong Md golam Kibria Jinguang Hu Department of Chemical and Petroleum Engineering University of CalgaryCalgaryAlberta T2N 1N4Canada School of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina

Biomass photorefinery to produce fuels and valuable chemicals is a promising approach to alleviating the energy crisis and achieving carbon ***,precisely modulating the photocatalytic conversion of biomass into value-added chemicals is still *** we demonstrate a feasible strategy to selectively produce arabinose via oriented glucose oxidation to gluconic acid,followed by the decarboxylation process for C1-C2 bond *** realize this process,gold nanoparticles(Au NPs)modified carbon nitride(AuCN)is rationally designed to regulate the electron transfer behavior of pristine carbon nitride from a two-electron pathway to a single-electron *** allows selective production of superoxide(·O_(2)^(-))from oxygen reduction reaction which triggers glucose oxidation into gluconic *** addition,the arabinose production is synergistically promoted by the improved charge separation efficiency and extended visible-light absorption via localized surface plasmon resonance(LSPR)of Au *** work demonstrates an example of a mechanism-guided catalyst design to improve biofuels/chemicals production from biomass photorefinery.

关键词： Biomass photorefinery Selective glucose photoreforming Carbon nitride LSPR Oxygen reduction reaction(ORR)

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Applying organic amendment enriches nutrient status of municipal solid waste compost and its application enhances tuber yield and nutrient concentrations of potato

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Waste Disposal and Sustainable Energy 2023年第4期5卷 439-450页

作者： Marufa Sultana M.Jahiruddin Mohammad golam Kibria Md Hosenuzzaman Md.Anwarul Abedin Department of Soil Science Faculty of AgricultureBangladesh Agricultural UniversityMymensingh2202Bangladesh Bangladesh Agricultural Research Institute JoydebpurBangladesh

Elevated price of chemical fertilizers and poor nutrient content in conventional organic sources such as municipal solid waste(MSW)compost necessitate the production of nutrient enriched compost which could serve as a potential alternative organic fertilizer *** studied three types of amended compost that were prepared by mixing 20%mustard oil cake(MOC)and 30%poultry manure(PM)or cow dung or sugarcane press mud(SPM)with 50%MSW *** viride was inoculated into every type of *** rate of amended or unamended MSW compost application was 10 t ha^(−1).The use of different amendments improved the nutrient level of MSW compost,of which the N increment was remarkable,ranging from 1.14%N(unamended compost)to 2.9%–3.22%N depending on the types of amendment.A field experiment was conducted to evaluate performances of the amended MSW composts on the yield and nutrient content of potato(variety BARI Alu25).All compost treatments except the sole MSW compost treatment produced significantly higher tuber yields than the sole fertilizer *** press mud based MSW compost+fertilizer treatment produced the highest tuber yield of 31.6 t ha^(−1)(65%increase over 100%fertilizers and 57%increase over 100%compost treatment).The tuber N concentration varied from 0.128%to 0.594%,P from 0.018%to 0.035%,K from 0.213%to 0.313%and S from 0.020%to 0.053%,with the highest result recorded with press mud+fertilizer *** use of amended composts had residual effects on soil N,P,K and S ***,the treatment containing 50%fertilizer+50%compost mixture(MSW:MOC:SPM in a ratio of 5:2:3)performed the best followed by PM amended *** is concluded that integrated use of 10 t ha^(−1) organic amended MSW compost with chemical fertilizers can ensure higher crop yield,nutrient content and sustained soil fertility in nutrient-deficient sub-tropical soil.

关键词： Mustard oil cake MSW compost Potato Poultry manure Sugarcane press mud

Climate Change and Its Adverse Impacts on Plant Growth in South Asia:Current Status and Upcoming Challenges

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Phyton-International Journal of Experimental Botany 2022年第4期91卷 695-711页

作者： Mohammad Saidur Rhaman Tahjib-Ul-Arif Mohammad golam Kibria Anamul Hoque Department of Seed Science and Technology Bangladesh Agricultural UniversityMymensingh2202Bangladesh Department of Biochemistry and Molecular Biology Bangladesh Agricultural UniversityMymensingh2202Bangladesh Department of Soil Science Bangladesh Agricultural UniversityMymensingh2202Bangladesh

Socioeconomic development,adaptive capacity of the population,and demographic conditions across the states of South Asia make it more vulnerable to climate *** Asia is daily going to be more vulnerable to climate change and climatic *** region is facing multiple challenges in terms of climate change,dilapidation of ecosystems,and food *** is the primary determining factor for agricultural output,which unswervingly influences food production across the *** Asia is mainly an agricultural foundation based region and thus the economy of these regions directly depends on agriculture and agricultural *** to the extensive dependence on natural assets for thriving,it makes the people of this region more vulnerable to climate *** region is now under serious risk from sea-level rising and growing incidences of extreme events such as flash floods,enhanced temperature,drought,salinity,cyclones,storms,landslides,and irregularity of *** abiotic stresses continuously disturb plant growth and *** is now the time to take urgent action on these issues towards a sustainable,inclusive and resource efficient way to overcome *** this review,we summarize the overall situation of climate change in the South Asian countries and their adverse consequences on plants,and upcoming challenges towards a sustainable production.

关键词： Climate change South Asia plant growth abiotic stress food security

Etiology of Diarrhea among Severely Malnourished Infants and Young Children: Observation of Urban-Rural Differences over One Decade in Bangladesh

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Food and Nutrition Sciences 2013年第3期4卷 233-239页

作者： Sumon Kumar Das mohammod Jobayer Chisti Sayeeda Huq Mohammad Abdul Malek Mohammed Abdus Salam Tahmeed Ahmed Abu Syed golam Faruque International Centre for Diarrheal Disease Research Dhaka Bangladesh.

There is inadequate information on the etiology of diarrhea in severely malnourished (SM) young children. Thus, the study aimed to determine the etiology of diarrhea among severely malnourished (z score ?3.00 SD) children in rural and urban Bangladesh. From the database (2000-2011) of Diarrheal Disease Surveillance Systems (DDSS) at rural Matlab and urban Dhaka hospitals of icddr,b, 2234 and 3109 under-5 children were found severely malnourished (underweight, stunted or wasted) respectively. Two comparison groups [moderately malnourished (MM) and well-nourished (WN)] were randomly selected in a ratio of 1:1:1. Children with all categories of SM were more likely to be infected with Vibrio cholerae (rural—11%;urban—15%), Shigella (16%;9%), Salmonella (1%;2%) and Campylobacter (3%;4%);and less likely to have rotavirus (25%;20%) compared to only one SM category. Isolation rate of Vibrio cholerae was significantly higher among SM both in rural and urban children (7%;13%) than those of MM (5%;10%) and WN (2%;8%) and lower for rotavirus (30%;31%), (34%;43%), (35%;47%) respectively (p 0.01). However, for Shigella it was only higher among rural SM children (11%) [MM (9%), and WN (8%) (p 0.01)]. The isolation rate of Salmonella in SM (2%) was similar to that in MM (2%;p = 0.72) but significantly higher than that in WN (1%;p 0.01) among urban children. Isolation rates of bacterial enteric pathogens were higher but rotavirus was lower in SM children in both rural and urban area with geographical heterogeneity.

关键词： Diarrhea Under-5 Children Rural Severe Malnutrition Urban

Petrophysical Characteristics of Silurian Mudstones from Central Taurides in Southern Turkey

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Journal of Earth Science 2021年第4期32卷 778-798页

作者： Zeynep Döner Qinhong Hu Mustafa Kumral Md golam Kibria Hongguo Qiao Mengdi Sun Department of Geological Engineering Faculty of MinesIstanbul Technical UniversityIstanbul 34469Turkey Department of Earth and Environmental Sciences The University of Texas at ArlingtonArlington TX 76019USA Shandong Provincial Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580China Key Laboratory of Tectonics and Petroleum Resources Ministry of EducationChina University of GeosciencesWuhan 430074China

This study used a range of integrated and complementary experiments to examine porestructure,fluid-shale wetting characteristics,sample size-dependent porosity towards different fluids,and imbibition behavior,as well as the relationships between these properties and the mineralogy of Silurian mudstones in the Central Taurides of *** with different sample-sizes,the experiments consisted of helium pycnometry,low-pressure nitrogen physisorption isotherm,mercury intrusion porosimetry,fluid immersion porosimetry,liquid displacement,fluid droplet wettability and contact angle measurements,and spontaneous imbibition of fluids;four fluids with different hydrophilicity were used to assess the characteristics of fluid-shale interaction and its influence on *** show that studied mudstones can be grouped into three rock types:siliceous,carbonate-dominated,and mixed *** and mixed mudstones have higher porosities,pore-throat diameters,surface areas and tortuosities than the carbonate-dominated mudstones,regardless of sample sizes and fluids *** low permeabilities and medium pore-throat sizes for the siliceous and mixed mudstones,the wettability and imbibition results show that these mudstones are both oil-wet and moderately-to-high *** contrast,the carbonate-dominated mudstones exhibit oil-wet *** results indicate that studied siliceous and mixed mudstones in the Central Taurides seem to have appropriate petrophysical properties in the context of reservoir quality.

关键词： Silurian mudstones Central Taurides of Turkey petrophysical properties pore structure connectivity fractal dimension

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Breaking Barriers:Selenium and Silicon-Mediated Strategies for Mitigating Abiotic Stress in Plants

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Phyton-International Journal of Experimental Botany 2023年第9期92卷 2713-2736页

作者： Mojtaba Kordrostami Ali Akbar Ghasemi-Soloklui Mohammad Anwar Hossain Mohammad golam Mostofa Department of Plant Breeding Nuclear Agriculture Research SchoolNuclear Science and Technology Research Institute(NSTRI)Atomic Energy Organization of Iran(AEOI)KarajIran Department of Genetics and Plant Breeding Bangladesh Agricultural UniversityMymensingh2202Bangladesh Department of Energy Plant Research Laboratory Michigan State UniversityEast Lansing48824USA Department of Biochemistry and Molecular Biology Michigan State UniversityEast Lansing48824USA

Numerous plant species,particularly those that can accumulate selenium(Se)and silicon(Si),benefit from these essential *** and Si accumulation in plants profoundly affects several biochemical reactions in *** how plants react to Se/Si enrichment is crucial for ensuring adequate dietary Se/Si intake for humans and animals and increasing plant tolerance to environmental *** studies have shown that Se/Si-enriched plants are more resistant to salinity,drought,extreme temperatures,UV radiation,and excess *** interplay between Se/Si in plants is crucial for maintaining growth and development under normal conditions while providing a critical defense mechanism against stressors like heavy metals and *** and Si commonly stimulate antioxidant defense systems in plants exposed to environmental stressors,but the involved mechanisms are complex and not well *** ensure the positive effects of Se/Si fortification in plants,it is essential to consider the degree of accumulation,the chemical form of Se/Si used,the method of application,and the likelihood of interaction with other *** this review,we will discuss the effects of Se/Si bio-fortification on plants subjected to abiotic *** responses to exogenous Se/Si will also be reviewed,emphasizing the influences of Se/Si in the modulation of enzymatic and non-enzymatic antioxidant defense mechanisms under various abiotic stress conditions.

关键词： Antioxidants ion homeostasis oxidative stress plant nutrients ROS selenium and silicon