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Najeeb ur Rehman Lashari,Mingshu Zhao,Jun Wang,XINHAI HE,Irfan Ahmed,Miao Miao Liang,Songpon Tangsee,Xiaoping Song 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.108 No.-
The energy storage properties of layered metal vanadate, especially alkali metal vanadates have beenextensively studied. Metal vanadates have a more robust electrochemical output in contrast with pristinevanadium oxides. However, the detailed processes underlying the efficiency contrast of vanadates andvanadium oxides have rarely been studied. Herein a facile hydrothermal and low-temperature polymerizationmethod was introduced to synthesize KV3O8 and KV3O8@PPy nanowire bundles as anode materialfor an aqueous rechargeable Lithium batteries. The nanowires are composed of KV3O8·0.59H2O calculatedusing thermal gravimetric analysis (TGA). Successfully synthesized layered vanadium based KV3O80.59H2O (KVO) and KV3O8 0.59H2O@PPy (KVO@PPy) nanowires and investigated the source of theimproved electrochemical efficiency of PPy coated potassium vanadates compared to pristine KVO usingcrystal structure analysis and electrochemical tests. We demonstrated increase in electrochemical stabilityfor KVO@PPy caused by synergistic effect of K+ in vanadate nanowires and PPy coating. In KVO theoxygen atoms have close contact with the K ions, and the stable K+ serve as ‘‘pillars” between interlayersto shield the layered structures from collapse during the charge/discharge phase, while the PPy reducescharge transfer resistance. This research adds helps us design better electrode materials to be used as ananode material for ARLB using alkali metal vanadate.
Javid Hussain,Najeeb Ur Rehman,Ahmed Al-Harrasi,Abdul Latif Khan,Tania Shamim Rizvi,Faryal Vali Mohammad,Mehjabeen,Liaqat Ali 대한약학회 2015 Archives of Pharmacal Research Vol.38 No.6
The plant species of genus Nepeta are used totreat various human diseases and for ornamental purposesas well. Nepethalate B (1) was isolated as a result ofphytochemical investigations of Nepeta clarkei and wassubjected in the present study for investigation of analgesic,anti-inflammatory, and central nervous system (CNS)depressant activities. The percentage inhibition in phase Iof the acetic acid induced writhing test of compound 1(dose of 0.1, 0.2 and 0.4 mg/kg of body weight) was 53.3,58.0 and 86.7 % respectively. These results were foundsignificantly higher (P\0.01) as compared to the negativecontrol. Moreover, the percentage inhibitions of threephases for 0.1, 0.2 and 0.4 mg/kg were higher than thevalues obtained for Aspirin (positive control). In formalintest, the percentage pain inhibition between 0 and 5 min(early phase) was 68.0, 25.5, and 75.5 % for 0.1, 0.2 and0.4 mg/kg intra-peritoneal doses of compound 1 respectively. In case of late phase (20–30 min) it was 63.0, 66.7and 48.1 %, respectively. In comparison to aspirin, overallpercentage inhibition of compound 1 was significantlyhigher in early and late phases. Interestingly, at all dosescompound 1 showed more potent anti-inflammatory effectsin terms of intensity and duration as compared to aspirin. The gross behavioral study of nepethalate B (1) was alsocarried out and the results revealed that it exhibited CNSdepression in the mice and showed a prominent decrease inlocomotor activity.
Nizwaside: a new anticancer pregnane glycoside from the sap of Desmidorchis flava
Hidayat Hussain,Ahmed Al-Harrasi,Muhammad Adil Raees,Najeeb Ur Rehman,Ahmed Al-Rawahi,Rene´ Csuk,Husain Yar Khan,Ghulam Abbas,Mohammed Abdullah Al-Broumi,Ivan R. Green,Ali Elyassi,Talat Mahmood 대한약학회 2015 Archives of Pharmacal Research Vol.38 No.12
The sap from the succulent Desmidorchis flava (N.E.Br) Meve and Liede yielded a new pregnane glycoside, named nizwaside whose structure was established using 1D and 2D NMR techniques as well as mass spectrometry (ESIMS). Nizwaside was tested for anticancer, DPPH antioxidant, urease enzyme inhibition, a-glucosidase enzyme inhibition and acetylcholinesterase inhibition activities. Interestingly, nizwaside showed significant anti-proliferative effects on MDA MB231 breast cancer cells with an IC50 of 23.5 lg/ml. Moreover, nizwaside was more effective than Doxorubicin, a wellknown clinical anticancer drug, in suppressing MDA MB231 cell proliferation even at concentrations lower than that of Doxorubicin (75 lg/ml nizwaside vs. 100 lg/ml Doxorubicin). On the other hand, nizwaside showed relatively weak antioxidant activity with 15 % inhibition.