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Dual three Phase Operation of Dual Airgap Permanent Magnet Vernier Machine Having a Yokeless Rotor
Siddiqi Mudassir Raza,Yazdan Tanveer,Humza Muhammad,Ahmad Ikhlaq,Hur Jin 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.4
In order to increase the speed range of permanent magnet machines in constant power regions, diff erent techniques including multi-phase confi gurations are usually adopted. This paper presents the dual three-phase operation of a novel dual-airgap permanent magnet vernier machine having a yokeless rotor. The presented machine comprises two stators, each having a three-phase winding, and a sandwiched single yokeless rotor. The outer and inner stator windings are treated as two diff erent sets of three-phase windings to accomplish the dual three-phase operation. To achieve this, three-phase currents are supplied to these winding sets by considering two cases: (i) out-of-phase currents having the same magnitude and (ii) in-phase currents with varying magnitudes. This dual three-phase operation provides better effi ciency in the in-phase operation. The presented yokeless model has a very high mutual inductance which improves the fl ux linkage between two stators. Moreover, the harmonic analysis and open circuit fault analysis are presented to confi rm the validity of the presented dual three-phase operation compared to the three-phase operation. 2D-FEM analysis is used to investigate the performance of the presented machine for dual three-phase operation.
η-Ricci Solitons in δ-Lorentzian Trans Sasakian Manifolds with a Semi-symmetric Metric Connection
Siddiqi, Mohd Danish Department of Mathematics 2019 Kyungpook mathematical journal Vol.59 No.3
The aim of the present paper is to study the ${\delta}$-Lorentzian trans-Sasakian manifold endowed with semi-symmetric metric connections admitting ${\eta}$-Ricci Solitons and Ricci Solitons. We find expressions for the curvature tensor, the Ricci curvature tensor and the scalar curvature tensor of ${\delta}$-Lorentzian trans-Sasakian manifolds with a semisymmetric-metric connection. Also, we discuses some results on quasi-projectively flat and ${\phi}$-projectively flat manifolds endowed with a semi-symmetric-metric connection. It is shown that the manifold satisfying ${\bar{R}}.{\bar{S}}=0$, ${\bar{P}}.{\bar{S}}=0$ is an ${\eta}$-Einstein manifold. Moreover, we obtain the conditions for the ${\delta}$-Lorentzian trans-Sasakian manifolds with a semisymmetric-metric connection to be conformally flat and ${\xi}$-conformally flat.
Siddiqi, Muhammad Zubair,Siddiqi, Muhammad Hanif,Kim, Yeon-Ju,Jin, Yan,Huq, Md. Amdadul,Yang, Deok-Chun Mary Ann Liebert 2015 Journal of medicinal food Vol.18 No.5
<P>In this study, red ginseng extract (RGE) was converted into high-content minor ginsenosides by fermenting with Bgp1 enzymes at 37 degrees C for 5 days. Compared to the RGE, the minor ginsenoside contents were increased in fermented red ginseng extract (FRGE). Moreover, the amount of minor ginsenosides such as Rh1 (11%) and Rg2 (16%) was slightly augmented, while the level of Rg3 (33%) was significantly increased after bioconversion. Furthermore, we also examined and compared the effect of RGE and FRGE on the differentiation and mineralization of preosteoblastic MC3T3-E1 cells. Similarly, the level of mRNA expression of intracellular alkaline phosphatase (ALP) activity, type-1 collagen (Col-I) was also increased. Based on the comparison, it is clear that the FRGE has improved effects on bone formation and differentiation of preosteoblastic MC3T3-E1 cells.</P>
Ciceribacter azotifigens sp. nov., a nitrogen-fixing bacterium isolated from activated sludge
Siddiqi, Muhammad Zubair,Choi, Gyu-Min,Im, Wan-Taek Society for General Microbiology 2018 International journal of systematic and evolutiona Vol.68 No.2
<P>A Gram-reaction-negative, catalase-and oxidase-positive, aerobic, transparent, motile and rod-shaped bacterium that was capable of fixing dinitrogen (designated strain A.slu09(T)), isolated from activated sludge, was characterized by a polyphasic approach to clarify its taxonomic position. Strain A.slu09(T) was observed to grow optimally at 30 degrees C and at pH 7.0 on R2A agar medium. Strain A.slu09(T) showed beta-glucosidase activity, converting the major ginsenoside Rd to ginsenoside F2. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain A.slu09(T) belongs to the genus Ciceribacter of the family Rhizobiaceae and was most closely related to Ciceribacter lividus MSSRFBL1(T) (97.8% similarity). The DNA G+C content was 67.2 mol%. The DNA-DNA hybridization value between strain A.slu09(T) and C. lividus KCTC 32403(T) was 16.9 +/- 1.17 %. The major polar lipids were phosphatidylcholine, phosphatidylglycerol, diphosphatidylglycerol, phosphatidylmethylethanolamine, phosphatidylethanolamine, aminophospholipid and two glycolipids, and one unknown phospholipid as a minor lipid. The predominant quinone was ubiquinone-10 (Q-10). The major fatty acids were C-19 : 0 cyclo omega 8c, C-18 : 1 omega 7c and/or C-18 : 1 omega 6c (summed feature 8) and C-18 : 0, a profile that supported the affiliation of A. slu09(T) to the genus Ciceribacter. Moreover, the physiological and biochemical characteristics and low level of DNA-DNA relatedness allowed the phenotypic and genotypic differentiation of strain A.slu09(T) from the recognized species of the genus Ciceribacter. Therefore, strain A.slu09(T) represents a novel species of the genus Ciceribacter, for which the name Ciceribacter azotifigens sp. nov. is proposed. The type strain is A.slu09(T) (=KACC 19080(T)=LMG 29962(T)).</P>
Siddiqi, Muhammad Hanif,Siddiqi, Muhammad Zubair,Ahn, Sungeun,Kim, Yeon-Ju,Yang, Deok Chun Pharmaceutical Society of Great Britain 2014 Journal of pharmacy and pharmacology Vol.66 No.12
<P>This study aimed to investigate the stimulative and pharmacological effects of ginsenoside Rh1 (hereinafter referred to as: Rh1) on differentiation and mineralization of osteoblast and its possible mechanism of action on the expression of bone morphogenetic protein 2 (BMP-2)/Runt-related gene 2 (Runx2) signalling pathways using mouse preosteoblastic MC3T3-E1 cell line as in-vitro model.</P>
Arthrobacter ginsengisoli sp. nov., isolated from soil of a ginseng field
Siddiqi, Muhammad Zubair,Kim, Yeon-Ju,Hoang, Van-An,Siddiqi, Muhammad Hanif,Huq, Md. Amdadul,Yang, Deok-Chun Springer-Verlag 2014 Archives of microbiology Vol.196 No.12
<P>A Gram-staining-positive, catalase-positive, oxidase-negative, non-motile, non-flagellate and rod-shaped bacterium, was designated as DCY81(T), and isolated from soil of a ginseng field in Pocheon province, Republic of Korea. The 16S rRNA gene sequence analysis revealed that strain DCY81(T) belonged to the genus Arthrobacter. Major fatty acid was anteiso-C15:0, while major polar lipids were diphosphatidyglycerol, phatidyglycerol, phosphatidylinositol, monogalactosyldiacylglycerol (GL1), and dimannosyldiacylglycerol (GL2). The dominant quinone was MK-9(H2). The peptidoglycan type was A3α with an L-Lys-L-Ala-L-Thr-L-Ala interpeptide bridge. The DNA-DNA hybridization relatedness between strain DCY81(T) and Arthrobacter siccitolerans LMG 27359(T) (98.2?%), Arthrobacter sulfonivorans JCM 13520(T) (97.81?%), Arthrobacter scleromae DSM 17756(T) (97.59?%), Arthrobacter oxydans KCTC 3383(T) (97.3?%) was 39.1??0.2, 62.2??1.6, 36.8??1.1 and 48.3??1.6?%, respectively which show that the genotypic separation of strain DCY81(T) from the closest reference strain of the genus Arthrobacter. The DNA G+C content was 65.2?mol%. The genotypic analysis, physiological, and chemotaxonomic results indicate that strain DCY81(T) represents a novel species of the genus Arthrobacter. Therefore, Arthrobacter ginsengisoli sp. nov., is proposed as the type strain (=KCTC 29225(T)?=?JCM 19357(T)).</P>