Genome-wide Identification, Expression Profiling and Promoter Analysis of Trehalose-6-Phosphate Phosphatase Gene Family in Rice

RAHMAN MD MUSTAFIZUR,Rahman Md Mizanor,엄준섭,전종성 한국식물학회 2021 Journal of Plant Biology Vol.64 No.1

Trehalose-6-phosphate phosphatase (TPP) plays a key role in trehalose metabolism in plants. Here, we performed comprehensive in silico analyses and identified 12 OsTPPs (Oryza sativa TPPs) utilizing various bioinformatics tools. Phylogenetic tree, accomplished with OsTPPs and TPPs from 11 monocot and dicot species, was divided mainly into two clades, each clade containing six OsTPPs. Exon–intron distribution was related to phylogenetic clades. All OsTPPs are distributed within nine chromosomes (chr.), except Chr. 1, Chr. 5 and Chr. 11. OsTPPs were found to be stable in nature according to the 3-D structure prediction. Cis-regulatory elements (CREs) were also analyzed using 2 kb upstream of start codon for each gene to predict their biological functions. We categorized all CREs in five distinct groups based on core elements, stress response, cellular development, hormonal regulation, and unknown function, distributed in a range of 3–14 CREs in each group. Interestingly, our expression analysis showed that OsTPPs were more upregulated in response to drought and cold stresses compared to salt stress. Abundance of stress-related CREs found signifies TPPs’ possible role in stress response, which may facilitate to find related transcription factors and unveil complex molecular mechanisms during stress response.

IP-MAC: A Distributed MAC for Spatial Reuse in Wireless Networks

RAHMAN, Md. Mustafizur,HONG, Choong Seon,LEE, Sungwon,LEE, JangYeon,CHO, Jin Woong The Institute of Electronics, Information and Comm 2010 IEICE TRANSACTIONS ON COMMUNICATIONS - Vol.93 No.6

<P>The CSMA/CA driven MAC protocols withhold packet transmissions from exposed stations when they detect carrier signal above a certain threshold. This is to avoid collisions at other receiving stations. However, this conservative scheme often exposes many stations unnecessarily, and thus minimizes the utilization of the spatial spectral resource. In this paper, we demonstrate that remote estimation of the status at the active receivers is more effective at avoiding collisions in wireless networks than the carrier sensing. We apply a new concept of the interference range, named as <I>n</I>-tolerant interference range, to guarantee reliable communications in the presence of <I>n</I> (<I>n</I> ≥ 0) concurrent transmissions from outside the range. We design a distributed <I>interference preventive</I> MAC (IP-MAC) using the <I>n</I>-tolerant interference range that enables parallel accesses from the noninterfering stations for an active communication. In IP-MAC, an exposed station goes through an Interference Potentiality Check (IPC) to resolve whether it is potentially interfering or noninterfering to the active communication. During the resolve operation, IPC takes the capture effect at an active receiver into account with interfering signals from a number of possible concurrent transmissions near that receiver. The performance enhancement offered by IP-MAC is studied via simulations in different environments. Results reveal that IP-MAC significantly improves network performance in terms of throughput and delay.</P>

Effects of day and night on swimming, grazing and social behaviours of rohu <i>Labeo rohita</i> (Hamilton) and common carp <i>Cyprinus carpio</i> (L.) in simulated ponds

Rahman, Mohammad Mustafizur,Verdegem, Marc,Wahab, Md Abdul,Hossain, Md Yeamin,Jo, Qtae Blackwell Publishing Ltd 2008 Aquaculture research Vol.39 No.13

<P>Abstract</P><P>Diel rhythmicity of grazing, swimming, resting and social interactions of rohu (<I>Labeo rohita</I>) (weight 66.5–68.3 g) and common carp (<I>Cyprinus carpio</I>) (79.9–82.0 g) were observed in 1 m<SUP>2</SUP> simulated ponds using video images. Fish behaviour was monitored during a full 24-h period, starting at 08:00 hours with a 15-min recording, which was repeated every 3 h. Rohu spent more time grazing during the day than at night. Grazing activity peaked at the beginning and at the end of the day. Grazing and resting of rohu were negatively correlated. Common carp grazed day and night, showing no distinct grazing peak. Considering the grazing time of rohu and common carp, a feeding schedule with two feeding times at 07:30 and 16:30 hours might be appropriate for better food intake and conversion in rohu–common carp polyculture system.</P>

A High Throughput On-Demand Routing Protocol for Multirate Ad Hoc Wireless Networks

RAHMAN, Md. Mustafizur,HONG, Choong Seon,LEE, Sungwon The Institute of Electronics, Information and Comm 2010 IEICE TRANSACTIONS ON COMMUNICATIONS - Vol.93 No.1

<P>Routing in wireless ad hoc networks is a challenging issue because it dynamically controls the network topology and determines the network performance. Most of the available protocols are based on single-rate radio networks and they use hop-count as the routing metric. There have been some efforts for multirate radios as well that use transmission-time of a packet as the routing metric. However, neither the hop-count nor the transmission-time may be a sufficient criterion for discovering a high-throughput path in a multirate wireless ad hoc network. Hop-count based routing metrics usually select a low-rate bound path whereas the transmission-time based metrics may select a path with a comparatively large number of hops. The trade-off between transmission time and effective transmission range of a data rate can be another key criterion for finding a high-throughput path in such environments. In this paper, we introduce a novel routing metric based on the <I>efficiency of a data rate</I> that balances the required time and covering distance by a transmission and results in increased throughput. Using the new metric, we propose an on-demand routing protocol for multirate wireless environment, dubbed MR-AODV, to discover high-throughput paths in the network. A key feature of MR-AODV is that it controls the data rate in transmitting both the data and control packets. Rate control during the route discovery phase minimizes the route request (RREQ) avalanche. We use simulations to evaluate the performance of the proposed MR-AODV protocol and results reveal significant improvements in end-to-end throughput and minimization of routing overhead.</P>

Ontogenetic shift in dietary preference and low dietary overlap in rohu (Labeo rohita) and common carp (Cyprinus carpio) in semi-intensive polyculture ponds

Rahman, Mohammad Mustafizur,Hossain, Md Yeamin,Jo, Qtae,Kim, Su-Kyoung,Ohtomi, Jun,Meyer, Carl Springer-Verlag 2009 Ichthyological research Vol.56 No.1

Slotted Transmissions using Frame aggregation: A MAC protocol for Capacity Enhancement in Ad-hoc Wireless LANs

엠디 무스타피주 라만,홍충선,Rahman, Md. Mustafizur,Hong, Choong-Seon The Institute of Electronics and Information Engin 2007 電子工學會論文誌-TC (Telecommunications) Vol.44 No.8

The IEEE 802.11 DCF channel access function allows single transmission inside two-hop network in order to avoid collisions and eliminate the hidden and exposed terminal problems. Singular transmission capability causes data frames waiting for the entire roundtrip time in the transmitter neighborhood, and results in increased frame latency and lower network throughput. Real-time and pervasive applications are severely affected for the lower medium utilization; especially with high network traffic. This work proposes a new scheme with the help of Frame Aggregation technique in IEEE802.11n and overcomes the single transmission barrier maintaining the basic DCF functionality. Proposed scheme allows parallel transmissions in non-interfering synchronized slots. Parallel transmissions bypass the conventional physical carrier sense and random Backoff time for several cases and reduce the frame latency and increase the medium utilization and network capacity. IEEE 802.11 DCF 채널 접근 기능은 충돌을 피하고 hidden-terminal과 exposed-terminal 문제를 회피하기 위하여 두 홈 네트워크 내에서는 단일 전송을 허락한다. 이러한 단일 전송은 전송자의 이웃 노드가 전체 왕복시간 동안 데이터 프레임을 기다리게 하며, 프레임 지연의 증가와 네트워크 처리량을 낮게 하는 결과를 초래한다. 실시간 응용들은 낮은 매체 이용, 특히 높은 네트워크 트래픽에 대해 심하게 영향을 받는다. 본 논문은 IEEE 802.11의 프레임 집합화 기술을 이용하여 기본적인 DCF 기능을 유지한 단일 전송 장애를 극복하는 새로운 방안을 제시한다. 제안한 방안은 비 간섭 동기화 슬롯에서 병렬 전송을 허용한다. 병렬 전송은 몇몇 상황에서 물리적인 전송자 감지와 랜덤 백오프 타임을 회피하며, 프레임 지연을 줄이고 매체 이용과 네트워크 용량을 증가시킨다.

Antiviral activities of ginseng and its potential and putative benefi ts against monkeypox virus: A mini review

Rajib Chandra Das,Zubair Ahmed Ratan,Md Mustafizur Rahman,Nusrat Jahan Runa,Susmita Mondal,Konstantin Konstantinov,Hassan Hosseinzadeh,Jae Youl Cho 고려인삼학회 2023 Journal of Ginseng Research Vol.47 No.6

Due to the Covid-19 pandemic more than 6 million people have died, and it has bought unprecedentedchallenges to our lives. The recent outbreak of monkeypox virus (MPXV) has brought out new tensionsamong the scientific community. Currently, there is no specific treatment protocol for MPXV. Severalantivirals, vaccinia immune globulin (VIG) and smallpox vaccines have been used to treat MPXV. Ginseng, one of the more famous among traditional medicines, has been used for infectious disease forthousands of years. It has shown promising antiviral effects. Ginseng could be used as a potentialadaptogenic agent to help prevent infection by MPXV along with other drugs and vaccines. In this minireview, we explore the possible use of ginseng in MPXV prevention based on its antiviral activity.