A Tuber Lectin from Arisaema jacquemontii Blume with Anti-insect and Anti-proliferative Properties

( Manpreet Kaur ),( Kuljinder Singh ),( Pushpinder Jai Rup ),( Sukhdev Singh Kamboj ),( Ajit Kumar Saxena ),( Madhunika Sharma ),( Madhulika Bhagat ),( Sarvesh Kumar Sood ),( Jatinder Singh ) 생화학분자생물학회 2006 BMB Reports Vol.39 No.4

Tuning the band energetics of size dependent titania nanostructures for improved photo-reductive efficiency of aromatic aldehydes

Manpreet Kaur Aulakh,Bonamali Pal 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-

Mono-dispersed and smaller sized TiO2 nanospheres (~8 nm and ~20 nm) exhibited superior photo-reductive efficiency for few aromatic aldehydes under UV light. It has been found that pnitrobenzaldehydeand benzaldehyde are efficiently reduced to p-aminobenzyl alcohol (80% and 61%)and benzyl alcohol (59% and 38%) by 8 nm and 20 nm particles respectively, relative to negligiblereduction by TiO2 (P25) under same experimental conditions. However, the successful photo-reductionof p-nitrotoluene (97%) was observed with P25 whose reduction potential ( 0.5 eV) lies below theconduction band (CB,0.85 eV vs NHE) of the catalyst. Thesefindings can be explained on the basis ofunsuitable and mismatched CB of P25 with respect to the lowest unoccupied molecular orbital ofCHOgroup to access its photo-activity. However, this hydrogenation occurred by synthesized smaller sizedTiO2 particles (~8 nm and~20 nm) due to their favorable band gap (3.85 eV and 3.62 eV) and conductionband edge ( 0.61 eV and0.50 eV). Moreover, the other physio-chemical characteristics of 8 nm and20 nm sized particles such as surface area (323 m2 g 1 and 297 m2 g 1), higher charge carrier relaxationtime (61 ms and 40 ms) are also co-related for ease of photo-activity relative to TiO2 (P25).

Four new species of Chimarra Stephens (Trichoptera: Philopotamoidea: Philopotamidae) from Indian Himalaya

Manpreet Singh Pandher,Malkiat Singh Saini,Sajad H. Parey 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.2

Four new species are added to the philopotamid fauna of India. The newly described species under ChimarraStephens are Chimarra barnardi sp. nov. and C. padami sp. nov. (both from Arunachal Pradesh), C. bidenta sp. nov. from Uttarakhand and C. quadrata sp. nov. from Sikkim. These species are distinguishable from each otheras well as from previously known allied species by consistent variation in the structure of inferior appendages,tergite X and the phallic apparatus of males.

A Review of Cloud Computing Security Issues

Manpreet Kaur,Hardeep Singh 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.5

Cloud Computing is an emerging paradigm which has become today’s hottest research area due to its ability to reduce the costs associated with computing. In today’s era, it is most interesting and enticing technology which is offering the services to its users on demand over the internet. Since Cloud computing stores the data and its disseminated resources in the environment, security has become the main obstacle which is hampering the deployment of cloud environments. There are number of users used cloud to store their personal data, so that data storage security is required on the storage media. The major concern of cloud environment is security during upload the data on cloud server. Data storage at cloud server attracted incredible amount of consideration or spotlight from different communities. For outsourcing the data there is a need of third party. The importance of third party is to prevent and control unauthorized access to data store to the cloud. This research paper discusses the security issues of cloud storage.

A Formal Policy Oriented Access Control Model for Secure Enterprise Network Environment

Manpreet Singh,Manjeet Singh Patterh,Tai-Hoon Kim 보안공학연구지원센터 2009 International Journal of Security and Its Applicat Vol.3 No.2

In this paper we use Security Evaluation Criteria as basis to develop the Network access control model for enterprise wide network computing environment. The Network access control model addresses both the access control and information flow control requirements of the enterprise network system. The security architecture of the model attempts to ensure authorized access to network resources and secure flow of information between network entities. The underlying concept of the Network access control model relies on the separation of the access control mechanism from the access control policy. This enables support for multiple access control policies within a single model specification. A further advantage of Network Access control model is that it is highly extensible, since it can be augmented with any new policy that a specific application or a user may require. The precision property is satisfied as network access control model is written in a formal mathematical notation. The property of simplicity is satisfied as only the security properties related to network computing system are modeled.

Simulative Investigation of 32x10, 32x20 and 32x40 Gb/s DWDM Systems with Dispersion Compensating Fibers

Manpreet Kaur,Himali Sarangal 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.8

Dense wavelength division multiplexing (DWDM) is a WDM technology with reduced channel spacing. This technology is really scalable in terms of handling additional wavelengths/users. But the dispersion compensation is a key issue in DWDM at bit rate ≥ 10 Gb/s. Dispersion can be fully compensated by using Dispersion compensating fiber as a compensator. In this paper, the performance of 32 channel DWDM system with post-dispersion compensation using DCF at different bit rates (10, 20 and 40 Gbps) is investigated. The simulation is done in Optisystem simulator. The performance of the simulated system has been investigated in terms of quality (Q) factor and bit error rate (BER).

Simulation Analysis of Tree and Mesh Topologies in Zigbee Network

Manpreet,Jyoteesh Malhotra 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.1

Recently wireless sensor Network (WSN) and wireless personal area network (WPAN) has gained lot of interest from the research community because of its diverse applications of controlling, monitoring and automation of home, offices or any rescue area. Zigbee based on IEEE 802.15.4 standard is key enabling technology for the success of both WSN and WPAN. Zigbee has some inherent powerful characteristics like very low power consumption, localization and low cost that has drawn the attention of research community recently. Along with merits come the challenges for the success of Zigbee based networks at various layers of the network model. Network topologies in Zigbee are to be selected based on applications and performance requirements. So this paper investigates the performance of Zigbee for tree and mesh topologies. In doing so parameters like MAC throughput, MAC load, MAC delay, end to end delay have been evaluated through extensive simulations using OPNET. The intricate behavior of these topologies in Zigbee shows optimum bounds of performance for these topologies have been computed in this work

3D printed stretching-dominated micro-trusses

Kaur, Manpreet,Yun, Tae Gwang,Han, Seung Min,Thomas, Edwin L.,Kim, Woo Soo Elsevier 2017 Materials & Design Vol.134 No.-

<P><B>Abstract</B></P> <P>Micro-architectures, such as cellular truss structures, enhance the mechanical properties of structural materials while ensuring that they are lightweight in nature. Among others, stretching-dominated truss structures are known for their high modulus and yield strength, which makes them the best choice for lightweight structural applications. Finite element analysis of octahedral vs. octet structures is used to compare the differences in stress distribution in the stretching-dominated deformation of such trusses. Both octahedral and octet stretching-dominated structures were fabricated by fused deposition modeling (FDM)-based three-dimensional (3D) printing. These micro-architectures are printed with different polymeric materials, such as polylactic acid or polylactide (PLA), nylon 618, and a carbon fiber reinforced composite of PLA (CFRPLA). In addition, the CFRPLA filament with randomly suspended carbon fibers in PLA undergoes shear-induced alignment along the strut direction of the 3D printed micro-trusses, which leads to an improved Young's modulus as compared to the other materials. The properties of the 3D printed stretching-dominated micro-trusses are evaluated by compression testing, finite element analysis (FEA), and thermal analysis. The 3D printed octet structure of CFRPLA with fiber alignment exhibits the highest modulus and yield strength of 0.6GPa and 17MPa, respectively.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Stretch-dominated and bending-dominated micro-trusses are fabricated by FDM-based 3D printing with 100 micrometers in strut diameter. </LI> <LI> Stretch-dominated octet micro-truss is mechanically programed by 3D printing with rigid and soft materials </LI> <LI> 3D printed CFRP truss shows strengthened mechanical properties resulted from shear-induced alignment of fibers along the 3D printing direction. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

A Tuber Lectin from Arisaema jacquemontii Blume with Anti-insect and Anti-proliferative Properties

Kaur, Manpreet,Singh, Kuljinder,Rup, Pushpinder Jai,Kamboj, Sukhdev Singh,Saxena, Ajit Kumar,Sharma, Madhunika,Bhagat, Madhulika,Sood, Sarvesh Kumar,Singh, Jatinder Korean Society for Biochemistry and Molecular Biol 2006 Journal of biochemistry and molecular biology Vol.39 No.4

A tuber lectin from Arisaema jacquemontii Blume belonging to family Araceae was purified by employing a single step affinity chromatography using column of asialofetuin-linked amino activated silica beads and the bound lectin was eluted with 100 mM glycine-HCl buffer pH 2.5. The purified A. jacquemontii lectin (AJL) showed a single protein band with an apparent molecular mass of 13.4 kDa when submitted to SDS-polyacrylamide gel electrophoresis under reducing as well as non-reducing conditions. The native molecular mass of AJL determined by gel filtration on a Biogel P-200 column was 52 kDa and its carbohydrate content was estimated to be 3.40%. Thus AJL is a tetrameric glycoprotein. The purified lectin agglutinated erythrocytes from rabbit but not from human. Its activity was not inhibited by any of the mono- and disaccharides tested except N-acetyl-D-lactosamine having minimal inhibitory sugar concentration (MIC) 25 mM. Among the glycoproteins tested only asialofetuin was found to be inhibitory (MIC $125\;{\mu}g/mL$). A single band was obtained in native PAGE at pH 4.5 while PAGE at pH 8.3 showed two bands. Isoelectric focusing of AJL gave multiple bands in the pI range of 4.6-5.5. When incorporated in artificial diet AJL significantly affected the development of Bactrocera cucurbitae (Coquillett) larvae indicating the possibility of using this lectin in a biotechnological strategy for insect management of cucurbits. Larvae fed on artificial diet containing sub-lethal dose of AJL showed a significant decrease in acid phosphatase and alkaline phosphatase activity while esterase activity markedly increased as compared to larvae fed on diet without lectin. Out of various human cancer cell lines employed in sulphorhodamine B (SRB) assay, this lectin was found to have appreciable inhibitory effect on the in vitro proliferation of HCT-15, HOP-62, SW-620, HT-29, IMR-32, SKOV-3, Colo-205, PC-3, HEP-2 and A-549 cancer cell lines by 82, 77, 73, 70, 41, 41, 37, 29, 21 and 21% respectively.

Three-dimensionally printed cellular architecture materials: perspectives on fabrication, material advances, and applications

Kaur, Manpreet,Han, Seung Min,Kim, Woo Soo Cambridge University Press (Materials Research Soc 2017 MRS Communications Vol.7 No.1

<▼1><B>Abstract</B><P/></▼1><▼2><P>Three-dimensional (3D) printing generates cellular architected metamaterials with complex geometries by introducing controlled porosity. Their ordered architecture, imitative from the hierarchical high-strength structure in nature, defines the mechanical properties that can be coupled with other properties such as the acoustic, thermal, or biologic response. Recent progress in the field of 3D architecture materials have advanced that enables for design of lightweight materials with high strength and stiffness at low densities. Applications of these materials have been identified in the fields of ultra-lightweight structures, thermal management, electrochemical devices, and high absorption capacity.</P></▼2>