Nutrient Uptake and Productivity as Affected by Nitrogen and Potassium Application Levels in Maize/Sweet Potato Intercropping System

Haque, M.Moynul,Hamid, A.,Bhuiyan, N.I. The Korean Society of Crop Science 2001 Korean journal of crop science Vol.46 No.1

Field experiment was conducted during 1993-94 season to determine the pattern of nutrient uptake and productivity of maize/sweet potato intercropping system. Four levels of nitrogen (0, 50, 100 and 150kg N ${ha}_{-1}$) and four levels of potassium (0, 40, 80 and 120kg $K_2$O ${ha}_{-1}$) formed treatment variables. Plants were sampled periodically to determine dry matter and tissue concentrations of N and K in the individual plant components of intercropped maize and sweet potato. Nitrogen and potassium fertilizer did not interact significantly to nutrient uptake by any plant parts of intercropped maize and sweet potato. But application of N fertilizer independently enhanced N uptake in all the plant parts of maize and sweet potato. The uptake of N in leaf, leaf sheath, stem, husk, and cob of maize increased upto 90 days after planting (DAP) but grain continued to accumulate N till its maturity. Sweet potato exhibited a wide variation in N uptake pattern. Sweet potato leaf shared the maximum uptake of N at 50 DAP which rapidly increased at 70 DAP and then declined. Declination of N uptake by petiole and stem were observed after 120 DAP whereas N uptake by tuber increased slowly upto 90 DAP and then rapidly till harvest. Rate of applied K had very little effect on the uptake patterns in different components of intercropped maize. Pattern of K uptake by leaf, petiole and stem of sweet potato showed almost similar trend to N uptake. But uptake of K by tuber increased almost linearly with the K application. Pattern of N and K uptake by grain and tuber paralleled the grain yield of maize and sweet potato respectively. Intercropped productivity of maize and sweet potato found to be better by the application of 100kg N and 120 kg $K_2$O ${ha}_{-1}$

Dose- and age-specific antioxidant responses of the mysid crustacean <i>Neomysis awatschensis</i> to metal exposure

Haque, Md. Niamul,Lee, Do-Hee,Kim, Bo-Mi,Nam, Sang-Eun,Rhee, Jae-Sung Elsevier 2018 Aquatic toxicology Vol.201 No.-

<P><B>Abstract</B></P> <P>Waterborne metals can adversely affect an organism’s innate defenses through oxidative stress. In the present study, the marine mysid <I>Neomysis awatchensis</I> was exposed to sublethal concentrations (1/10 and 1/5 of the median LC50s) of As, Cd, Cu, Pb, and Zn for 48 or 96 h at the juvenile and adult developmental stages, and the dose- and age-specific antioxidant defense system responses were characterized. Metal accumulation and modulation of four key antioxidant biomarkers, malondialdehyde (MDA), glutathione (GSH), superoxide dismutase, and catalase, were measured in juvenile and adult mysids. Based on LC50, level of metal toxicity was dependent on metal concentration, developmental stage, and the exposure duration. Intracellular MDA content was increased in the As-, Cu-, Pb-, and Zn-exposed juvenile mysids after exposure for 48 and/or 96 h, while increases in MDA content were observed in adult mysids following Cu and Zn exposure. Interestingly, GSH content was differentially modulated, where intracellular GSH levels decreased in juvenile mysids following Cd, Cu, Pb, and Zn exposure, but significantly increased in metal-exposed adult mysids, except for Pb exposure. The catalase and superoxide dismutase activities displayed similar stage-specific increases or decreases as also observed for the different GSH levels, suggesting that the susceptibility to and defense against metal-induced oxidative stress differed based on stage. Modulations in MDA and GSH content and enzymatic activity of the antioxidant defense system indicate that mysid antioxidant defense system factors are intimately connected during control of oxidative imbalances with different capacities at different developmental stages.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Evidence on the age-specific bioconcentration of five metals in the marine mysid was obtained. </LI> <LI> Age-specific relationship between metal dynamics and ecotoxicity between ages was observed. </LI> <LI> Oxidative stress was induced by metals and caused distinctive age-specific antioxidant response. </LI> </UL> </P>

Superior adsorption capacity of mesoporous carbon nitride with basic CN framework for phenol

Haque, Enamul,Jun, Jong Won,Talapaneni, Siddulu Naidu,Vinu, Ajayan,Jhung, Sung Hwa The Royal Society of Chemistry 2010 Journal of materials chemistry Vol.20 No.48

<p>Highly basic 2D-mesoporous carbon nitride (MCN-1) shows the highest adsorption capacity and adsorption kinetic constant for phenol due to its well ordered porous structure with the in-built basic NH and NH<SUB>2</SUB> groups on the surface, high surface area and large pore volume, suggesting the potential application of MCN-1 for the purification of contaminated water.</p> <P>Graphic Abstract</P><P>The highest adsorption capacity and kinetic constant for phenol adsorption has been achieved over mesoporous carbon nitride due to the presence of in-built basic functional groups and excellent textural parameters. <img src='http://pubs.rsc.org/ej/JM/2010/c0jm02974b/c0jm02974b-ga.gif'> </P>

Targeting the microglial NLRP3 inflammasome and its role in Parkinson's disease

Haque, Md. Ezazul,Akther, Mahbuba,Jakaria, Md.,Kim, In‐,Su,Azam, Shofiul,Choi, Dong‐,Kug John WileySons, Inc. 2020 Movement disorders Vol.35 No.1

<P><B>Abstract</B></P><P>Excessive activation of microglia and subsequent release of proinflammatory cytokines play a crucial role in neuroinflammation and neurodegeneration in Parkinson's disease (PD). Components of the nucleotide‐binding oligomerization domain and leucine‐rich‐repeat‐ and pyrin‐domain‐containing 3 inflammasome complex, leucine‐rich‐repeat‐ and pyrin‐domain‐containing 3, caspase‐1, and apoptosis‐associated speck‐like protein containing a CARD, are highly expressed in activated microglia in PD patient brains. Findings suggest that neurotoxins, aggregation of α‐synuclein, mitochondrial reactive oxygen species, and disrupted mitophagy are the key regulators of microglial leucine‐rich‐repeat‐ and pyrin‐domain‐containing 3 inflammasome activation and release of interleukin‐1β and interleukin‐18 caspase‐1‐mediated pyroptotic cell death in the substantia nigra of the brain. Although this evidence suggests the leucine‐rich‐repeat‐ and pyrin‐domain‐containing 3 inflammasome may be a potential drug target for treatment of PD, the exact mechanism of how the microglia sense these stimuli and initiate leucine‐rich‐repeat‐ and pyrin‐domain‐containing 3 inflammasome signaling is unknown. Here, the molecular mechanism and regulation of microglial leucine‐rich‐repeat‐ and pyrin‐domain‐containing 3 inflammasome activation and its role in the pathogenesis of PD are discussed. Moreover, the potential of both endogenous and synthetic leucine‐rich‐repeat‐ and pyrin‐domain‐containing 3 inflammasome modulators, long noncoding RNA, microRNA to develop novel therapeutics to treat PD is presented. Overall, we recommend that the microglial leucine‐rich‐repeat‐ and pyrin‐domain‐containing 3 inflammasome can be a potential target for PD treatment. © 2019 International Parkinson and Movement Disorder Society</P>

Safety Profile Assessment and Identification of Volatile Compounds of Krill Eupausia superba Oil and Residues Using Different Extraction Methods

Haque, A.S.M. Tanbirul,Kim, Seon-Bong,Lee, Yang-Bong,Chun, Byung-Soo The Korean Society of Fisheries and Aquatic Scienc 2014 Fisheries and Aquatic Sciences Vol.17 No.2

In this study, Krill Eupausia superba oil was extracted using different solvents and supercritical carbon dioxide (SC-$CO_2$). During SC-$CO_2$ extraction, the pressure was set at 40 MPa and temperatures ranged from $40^{\circ}C$ to $55^{\circ}C$. We examined the differences in volatile compounds and safety profiles among extraction methods. Volatile compounds were determined using the thermal desorption system integrated with gas chromatography-mass spectrometry (GC-MS). Heavy metal content was analyzed by inductively coupled plasma mass spectrometry (ICP-MS). According to our results 10 volatile compounds were identified in krill sample. After SC-$CO_2$ extraction of oil, the concentrations of volatile compounds decreased, but increased after solvent extraction. In krill, heavy metal concentrations remained within the permissible limit. Moreover, Zn and Fe which have health benefits were detected at high concentrations. During a 90 days storage period at different temperatures, microbial activity was found to be lowest in SC-$CO_2$ extracted residues. Thus, the quality of krill oil and the residues obtained using SC-$CO_2$ extraction was higher and the oil was safer than those obtained using conventional solvent extraction. These results can be applied to the food industry to maintain high quality krill products.

USE OF A 3D RANS MODEL TO PREDICT STRATIFICATION EFFECTS RELATED TO FISH PASSAGE AT HYDROPOWER DAMS

HAQUE MD. MANJURUL,KOKEN METE,CONSTANTINESCU GEORGE,WEBER LARRY 한국수자원학회 2005 한국수자원학회 학술대회 Vol.2005 No.1

Xenotransplantation of layer-by-layer encapsulated non-human primate islets with a specified immunosuppressive drug protocol

Haque, M.R.,Kim, J.,Park, H.,Lee, H.S.,Lee, K.W.,Al-Hilal, T.A.,Jeong, J.H.,Ahn, C.H.,Lee, D.S.,Kim, S.J.,Byun, Y. Elsevier Science Publishers 2017 Journal of controlled release Vol.258 No.-

<P>Islet transplantation is as effective as but also less immunogenic than pancreas transplantation for the treatment of type 1 diabetes mellitus. However, as the complete elimination of immunogenicity still remains a major obstacle in islet transplantation, layer-by-layer encapsulation (LbL) of pancreatic islets using biocompatible polymers offers a rational approach to reducing host immune response towards transplanted islets. We investigated the effect of LbL of non-human primate (NHP) islets on reducing immunogenicity as a preclinical model since NHPs have close phylogenetic and immunological relationship with humans. LbL with three-layers of polyethylene glycol (PEG) molecules (SH-6-arm-PEG-NHS, 6-arm-PEG-catechol and linear PEG-SH) showed a uniform nano-shielding on islets without the loss of viability or function of islets. An immunosuppressive drug protocol was also combined to improve the survival rate of the transplanted islets in vivo. A xenorecipient (C57BL/6 mice) of LbL islet transplanted along with our immunosuppressive drug protocol showed 100% survival rate for 150 days after transplantation. On the other hand, naked islet recipients showed poor survival time of 5.5 +/- 1.4 days without drugs and 77.5 +/- 42 days with the drug protocol. Immunohistochemistry of the transplanted grafts and serum cytokine concentration demonstrated less immunogenicity in the LbL islet transplanted recipients compared with the naked islet ones.</P>

The Contribution of Non-conventional Microfinancing on Economic, Social and Household Empowerment of Women Borrowers in Malaysia

HAQUE, Tasnuba,SIWAR, Chamhuri,GHAZALI, Rospidah,SAID, Jamaliah,BHUIYAN, Abul Bashar Korea Distribution Science Association 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.2

This study investigated the effect of the Amanah Ikhtiar Malaysia (AIM) microfinancing on the economic, social, and household empowerment of women borrowers in Malaysia. The study used a quantitative approach based on primary data. For this study, the participants comprised 384 AIM borrowers from Terengganu, Kelantan, and Pahang in the east coast region of Malaysia. Purposive stratified random sampling was used as well as the Krejcie and Morgan method to count the number of samples. Descriptive statistics and the Women Empowerment Index (WEI) were used in the analysis. The study findings reveal that AIM microfinancing affects the economic, social, and household empowerment of women borrowers in Malaysia. However, in comparing the three categories, women enjoyed more freedom in social and household decision-making than in economic decision-making. The present study recommends policies for the successful and effective operation of microfinance programs by providing the necessary guidelines for the control of AIM loan for women borrowers; increasing income-generating activities, sufficient access of credit, and proper education for the borrowers; and giving economic freedom of choice with necessary skill training policymaking options for the government and NGOs with the aim to improve the total household income and empowerment of the microcredit borrowers in Malaysia.

Synthetic Methods and Applications of Silicon Nanowire: A Review

Haque, Md Hasanul,Sohn, Honglae The Basic Science Institute Chosun University 2017 조선자연과학논문집 Vol.10 No.2

In this review paper, we will discuss about the methods of synthesizing Si nanowires by Top-down and Bottom-up. Silicon nanowires have a lot of application on various fields such as Li ion batteries, solar cells, chemical and biological sensors. We will address some of the applications of silicon Nanowires.

Comparison of net global warming potential between continuous flooding and midseason drainage in monsoon region paddy during rice cropping

Haque, Md.M.,Kim, G.W.,Kim, P.J.,Kim, S.Y. Elsevier Scientific Pub. Co 2016 Field crops research Vol.193 No.-

<P>Midseason drainage is regarded as a key practice to suppress methane (CH4) emission from paddy soil during rice cultivation, but it can increase carbon dioxide (CO2) and nitrous oxide (N2O) emissions. However, the influences of midseason drainage practice on the net global warming potential (GWP) and greenhouse gas intensity (GHGI) of rice cropping systems is not well documented in the East monsoon region. In this field study, the effect of a 30-day midseason drainage practice from the 28th day after transplanting (DAT) to the 57th DAT on the three major greenhouse gas (GHG) fluxes and yield properties were compared with those of a continuous flooding system during rice cultivation in 2011 and 2012. The impact of midseason drainage on changing three GHG emissions was compared using the GWP value and GHG intensity (GHGI). Midseason drainage significantly reduced the net GWP scale by 46-50% of the continuous flooding, mainly due to 50-53% reduction of seasonal CH4 fluxes. Midseason drainage significantly increased N2O flux by 20-37% over the conventional flooding, but the influence of N2O emission increase on the net GWP scale was negligible. Midseason drainage significantly decreased soil C sequestration capacity by around 60% of continuous flooding, and then increased net GWP by 0.25-0.32 Mg CO2-eq. ha(-1) during rice cultivation. There was no significant difference of rice yield between two irrigation systems, and then midseason drainage can reduce GHGI by 50-56% of the continuous flooding. In conclusion, the midseason drainage practice during rice cultivation could be very useful soil management strategy to reduce GHG emission impact from lowland rice fields without impacting rice productivity. (C) 2016 Elsevier B.V. All rights reserved.</P>