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Ecological fitness of brown planthopper, Nilaparvata lugens (Stål), to rice nutrient management

Ecological Processes 2017年第1期6卷 149-158页

作者： md.Mamunur Rashid Mahbuba Jahan Khandakar S.Islam md.abdul latif Plant Physiology Division Bangladesh Rice Research Institute(BRRI)Gazipur 1701Bangladesh Department of Entomology Bangladesh Agricultural UniversityMymensingh 2202Bangladesh Plant Pathology Division Bangladesh Rice Research Institute(BRRI)Gazipur 1701Bangladesh

Introduction:The brown planthopper(BPH),Nilaparvata lugens(Stål)(Hemiptera:Delphacidae),is a notorious insect pest of *** supplementation can alter plant biochemical compositions which may indirectly affect on ecological fitness parameters of its insect ***,few findings are available on nutrient-induced ecological fitness of BPH and relationship of BPH fitness parameters with its host rice plant biochemical ***:We studied the main and interaction effects of nitrogen(N),phosphorus(P),and potassium(K)inputs on BPH fitness,as measured by the following variables:nymph survival,nymphal duration,adult body weight,and its *** planthopper fitness parameters were regressed as function of rice plant(Oryza sativa)biochemical composition.A completely randomized design with four replications in a factorial scheme was used considering N,P,and K levels as ***:Nitrogen application to the host rice plants provided greater survival and enhanced body weight of *** nymphal duration was found to decrease with N subsidy that caused shorter generation time of *** compounds N and soluble protein(SP),total free sugar(TFS),and silicon(Si)content in rice plant tissue correlated strongly with all fitness traits of ***,SP,and TFS associated positively with BPH survival and body weight,while negatively with nymphal *** contrast,Si had negative correlation with BPH survival and body weight,but positive with nymphal *** supplementation to host plant contributed to increase BPH body *** of P with all parameters of BPH were weak except body weight which was highly significant and *** between N and P inputs demonstrated significant effect on BPH body *** of K had no significant effect on BPH survival and *** analysis did not detect significant relationship of BPH fitness parameters with plant tissue content of ***:The res

关键词： Nilaparvata lugens Nutrient management Survival Nymphal duration Body weight

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Performance comparison of zero-Schottky-barrier and doped contacts carbon nanotube transistors with strain applied

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Nano-Micro Letters 2010年第2期2卷 126-133页

作者： md.abdul Wahab Khairul Alam Department of Electrical and Electronic Engineering United International University Department of Electrical and Electronic Engineering East West University

Atomistic quantum simulation is performed to compare the performance of zero-Schottky-barrier and doped source-drain contacts carbon nanotube field effect transistors(CNTFETs) with strain applied. The doped source-drain contact CNTFETs outperform the Schottky contact devices with and without strain applied. The off-state current in both types of contact is similar with and without strain applied. This is because both types of contact offer very similar potential barrier in off-state. However, the on-state current in doped contact devices is much higher due to better modulation of on-state potential profile, and its variation with strain is sensitive to the device contact type. The on/off current ratio and the inverse subthreshold slope are better with doped source-drain contact, and their variations with strain are relatively less sensitive to the device contact type. The channel transconductance and device switching performance are much better with doped source-drain contact, and their variations with strain are sensitive to device contact type.

关键词： Zero-Schottky-barrier Doped contact Strain Inverse subthreshold slope Intrinsic cut-off frequency

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Analytical model of compact star in low-mass X-ray binary with de Sitter spacetime

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Research in Astronomy and Astrophysics 2019年第2期19卷 125-132页

作者： Sajahan Molla Rabiul Islam md.abdul Kayum Jafry Mehedi Kalam Department of Physics Aliah University Department of Physics Shibpur Dinobundhoo Institution (College)

In this article, we suggest a Sitter model in favor of compact stars in low-mass X-ray ***, we have considered the presence of a cosmological constant(on a small scale) to investigate the stellar structure. We conclude that this approach is very suitable for the familiar physical model of compact stars in low-mass X-ray binaries. We calculate the probable radius, compactness(u) and surface redshift(Z_s) of six compact stars in low-mass X-ray binaries, namely Cyg X-2, V395 Carinae/2 S 0921–630, XTE J2123–058,X1822–371(V691 CrA), 4 U 1820–30 and GR Mus(XB 1254–690). We also offer a possible equation of state(EOS) for the stellar objects.

关键词： stars:low-mass stars:mass function equation of state

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Mainstreaming Decentralization and Collaboration in Disaster Risk Management:Insights from Coastal Bangladesh

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International Journal of Disaster Risk Science 2023年第3期14卷 382-397页

作者： Mohammad abdul Quader Amanat Ullah Khan md.abdul Malak Matthieu Kervyn Department of Geography Earth System ScienceVrije Universiteit Brussel1050 BrusselsBelgium Department of Geography and Environment Jagannath UniversityDhaka 1100Bangladesh Department of Geography and Environment Dhaka UniversityDhaka 1000Bangladesh Department of Environmental Science Bangladesh University of ProfessionalsDhaka 1216Bangladesh

Bangladesh is renowned in disaster risk reduction(DRR)for active involvement of community people and local disaster management institutions in DRR *** study aimed to describe the disaster risk management(DRM)institutions and assess their functioning in six coastal unions across the three coastal zones of *** qualitative and quantitative research approaches were *** study focused on two key local institutions—the Union Disaster Management Committees(UDMCs)and the Cyclone Preparedness Program(CPP)—functioning at the union level in *** institutions have both horizontal and vertical collaborations with other ***,we argue that the UDMCs'external dependencies in their functioning indicate their limited financial and administrative autonomy,which is a barrier to successfully institutionalizing disaster *** results show that the CPP is the most successful program,markedly increasing the trust of the people in warning dissemination and evacuation efforts in the event of a *** the adoption of decentralized risk management systems has resulted in significant progress in increased rate of evacuation and reduced death rate and damage,lack of funding and equipment,limited coordination between institutions,lack of skilled and knowledgeable workforce,and inappropriate power structures may reduce the effectiveness of DRR activities prior to,during,and following disasters.

关键词： Coastal Bangladesh Cyclone preparedness program(CPP) Decentralization Disaster risk governance Institutional linkage Union disaster management committee(UDMC)

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Functional relationships of nodulation response and biomass production at nursery stages of two fast-growing, leguminous-multipurpose tree species in Bangladesh: Albizia saman and Leucaena leucocephala

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Forestry Studies in China 2013年第4期15卷 274-285页

作者： md.Salim AZAD Samir MONDOL md.abdul MATIN Forestry and Wood Technology Discipline Khulna University Faculty of Forest Sciences and Forest Ecology Georg-August University

This study was carried out to assess the relationship of the status of nodulation(i.e., the number of nodules, their shape and size) in root and biomass production of plant growth parameters(i.e., number of leaves, root and shoot lengths, root biomass and shoot biomass) in Albizia saman and Leucaena leucocephala. The assessment started 60 days after seeding. The study revealed that nodulation response and biomass production in both species showed significant differences over time(p < 0.05) in all variables except in the root-shoot ratio(oven-dry) of L. leucocephala. The study also showed significant differences(p < 0.05) in nodule formation and biomass production at the end of the study period between the two species except in the number of nodules and leaves and the green root-shoot ratio. There were strong positive correlations between nodule formation and biomass production, i.e., the number of nodules and the age of plants, the number of nodules and leaves, as well as the number of nodules and biomass(root biomass and shoot biomass) in both species. The results obtained using principal component analysis(PCA) and correlation coefficients of the different characteristics of nodulation and biomass production were similar in both species. The PCA showed that shoot biomass(shoot green weight and shoot oven-dry weight) is positively correlated with PC1(with an eigenvalue of 7.50) and root length is positively correlated with PC2(with an eigenvalue of 0.19) in the case of A. saman. In the case of L. leucocephala, the PCA revealed that root biomass(root green weight and root oven-dry weight), shoot biomass and shoot length are also positively correlated with PC1, while nodule formation and the number of leaves are positively correlated with PC2(with an eigenvalue PC1 of 6.92 and PC2 of 0.49).

关键词： leguminous tree species,nitrogen fixation,nodule formation nursery practice seedling growth

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Unsteady Transonic Flow Control around an Airfoil in a Channel

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Journal of Thermal Science 2016年第2期25卷 117-122页

作者： md.abdul Hamid A.B.M.Toufique Hasan Mohammad Ali Yuichi Mitsutake Toshiaki Setoguchi Shen Yu Department of Mechanical Engineering Bangladesh University of Engineering and Technology (BUET) Institute of Ocean Energy Saga University Institute of Engineering Thermophysics Chinese Academy of Science

Transonic internal flow around an airfoil is associated with self-excited unsteady shock wave oscillation. This unsteady phenomenon generates buffet, high speed impulsive noise, non-synchronous vibration, high cycle fatigue failure and so on. Present study investigates the effectiveness of perforated cavity to control this unsteady flow field. The cavity has been incorporated on the airfoil surface. The degree of perforation of the cavity is kept constant as 30%. However, the number of openings(perforation) at the cavity upper wall has been varied. Results showed that this passive control reduces the strength of shock wave compared to that of baseline airfoil. As a result, the intensity of shock wave/boundary layer interaction and the root mean square(RMS) of pressure oscillation around the airfoil have been reduced with the control method.

关键词： transonic flow passive control shock wave oscillation

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Effect of different pre-sowing treatments on seed germination percentage and growth performance of Acacia auriculiformis

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Journal of Forestry Research 2011年第2期22卷 183-188页

作者： md.Salim Azad Mizanur Rahman Manik md.Shamin Hasan md.abdul Matin Forestry and Wood Technology Discipline Khulna University

Seed morphology,germination and seedlings growth of Acacia auriculiformis were *** experiment was conducted in the nursery of Forestry and Wood Technology Discipline,Khulna University,*** seeds of the species were collected from healthy trees of road side plantation from different areas of Khulna District,Bangladesh and treated with five pre-sowing treatments（control,immersion in cold water,immersion in hot water,scarification with sand paper and immersion in concentrated H2SO4）.The average length,breadth and thickness were found to be（0.58±0.017） cm,（0.44±0.007） cm and（0.20±0.089） cm,*** was conducted in polybags with a mixture of top soil,coconut husk,coarse sand,and fine sand in a ratio of 3：4：1：*** reveal that pre-sowing treatments influences the germination rates of seeds that significantly increase the percentage germination compared with those in control（43%） and cold water treatment（52%）.The highest germination success rate was found 83% in hot water treatment followed by 78% in scarification with sand paper,and 75% with immersion in *** started from 7 to 12 days and completed between 28 and 35 days period in all *** showed the significant difference（p0.05） among the treatments in seed germination,but no significant difference among treatment with regard to starting day,closing day and total germination *** case of height and diameter growth,seedlings originated from the seeds with hot water treatment shows significantly higher in wet season（from May to July）.Hot water treatment can be recommended on seed germination of the species in rural Bangladesh.

关键词： seed germination seed dormancy pre-sowing treatment seedling growth Acacia auriculiformis

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Clinacanthus nutans:a review of the medicinal uses,pharmacology and phytochemistry

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Asian Pacific Journal of Tropical Medicine 2016年第4期9卷 393-399页

作者： md.Ariful Alam Sahena Ferdosh Kashif Ghafoor md.abdul Hakim abdul Shukor Juraimi Alfi Khatib md.Zaidul I.Sarker Faculty of Pharmacy.International Islamic University Malaysia(IIUM) Kuantan Campus Faculty of Science International Islamic University Malaysia(IIUM).Kuantan Campus Department of Food Science and Nutrition King Saud University Institute of Tropical Agriculture University Putra Malaysia Department of Crop Science University Putra Malaysia

Clinacanthus nutans Lindau is known as snake grass belonging to the Acanlhaceae *** plant has diverse and potential medicinal uses in traditional herbal medicine for treating skin rashes,insects and snake bites,lesions caused by herpes simplex virus,diabetes,and gout in *** and *** investigations documented the varied contents of bioaclive compounds from litis plant namely flavonoids,glycosides,*** and *** pharmacological experiment proved that various types of extracts and pure compounds from this species exhibited a broad range of biological properties such as anti-inflammatory,antiviral,antioxidant,and anti-diabetic *** lindings of toxicity study showed that extracts from this plant did not show any toxicity thus it can be used as strong therapeutic agents for specific diseased ***,further experiments on chemical components and their mode of action showing biological activities are required to elucidate the complete phytochemical profile and assess to confirm their suitability tor future *** review summarizes the medicinal uses,phytochemistry and pharmacology of this plant in order to explore its therapeutic potential and gaps necessitating for prospected research work.

关键词： Clinacanthus nutans Medicinal uses Phytochemicals Pharmacology Therapeutic potential

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Water and sediment quality parameters in the Chalan Beel, the largest wetland of Bangladesh

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Chinese Journal of Oceanology and Limnology 2015年第4期33卷 895-904页

作者： SAYEED md.Abu HOSSAIN Mostafa Ali Reza WAHAB md.abdul HASAN md.Tawheed SIMON Kumar Das MAZUmdER Sabuj Kanti Faculty of Fisheries Sylhet Agricultural University Faculty of Fisheries Bangladesh Agricultural University School of Environmental and Natural Resource Sciences Faculty of Science and Technology Universiti Kebangsaan Malaysia Marine Ecosystem Research Center Faculty of Science and Technology Universiti Kebangsaan Malaysia

A study was conducted to investigate the status of the water and sediment quality in the Chalan Beel——a major fresh water fish reservoir of the country for a period of one year from July 2007 to June 2008. The mean values of water quality parameters(depth: 214.73±152.22 cm, temperature 27.68±4.26℃, transparency 123±82 cm, p H 9.7±0.47, total alkalinity 137±42 mg/L, conductivity 307±147 μs/cm, total dissolved solids 183±89 mg/L, ammonia-N 0.27±0.39 mg/L, nitrate-N 0.09±0.07 mg/L, phosphate-P 2.01±2.53 mg/L) and sediment quality parameters(p H 7.21±0.35, organic matter 2.59±0.52%, total nitrogen 0.09±0.04%, available phosphorus 5.4±3.6 Meq./100 g and exchangeable potassium 0.43±0.14 Meq./100 g) were within the range recommended for most of the inland fishes of Bangladesh. Although the water and sediment quality parameters except ammonia and phosphate are in the suitable range, the overall results suggest that better management techniques should be practiced in order to overcome the declining trend of associated aquatic life(fauna and flora) of this important fresh water body of Bangladesh.

关键词： Chalan Beel total dissolve solids transparency residual effect organic matter sustainable management

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The Impact of E-commerce on Consumer Purchasing Behavior for the Coronavirus Disease (COVID-19)

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Journal of Sustainable Business and Economics 2022年第1期5卷 20-28页

作者： md.abdul Halim Department of Business Administration Mawlana Bhashani Science and Technology UniversityTangailBangladesh

The purpose of this study is to evaluate how COVID-19 is changing consumer behavior and how it is changing e-commerce *** study has been conducted through a qualitative *** Coronavirus changed worldwide patterns *** differences are caused by the high levels of accidental and secondary funding that this virus *** study showed how e-commerce has grown due to the *** individuals deal with their new living conditions,they have changed their shopping behavior to meet their *** COVID-19 pandemic significantly affects many aspects of life,including how individuals deal with their needs and not their *** behavior of people,the nature of businesses,and the manner of life have *** spreads fears among individuals that they should avoid interacting *** effect of Coronavirus has transformed the nature of business in the entire e-commerce *** particular,COVID-19 has a substantial influence on global e-commerce and in certain cases,has negative consequences,although generally,e-commerce is quickly increasing because of ***,e-commerce businesses confront various problems,including extended delivery times,movement control challenges,social distance,and lock-up or *** shipping and supply processes are now rather sluggish,yet people are still buying since they do not have any other ***,people move to technology because of *** study has shown the trend of e-commerce in recent times and also shows how consumers tend to adopt *** is no such issue in the previous *** study fills in the gaps on these issues and also helps to improve the global economy.

关键词： E-commerce COVID-19 Global perspective

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