Cytotoxic Chalcones from<i>Desmodium oxyphyllum</i>

Wang, Huan; Li, Yin-Ke; Ji, Bing‐Kun; Xia, Cong‐Fang; Yang, Juan‐Xia; Zhou, Min; Ye, Yanqing; Hu, Qiu‐Fen

doi:10.5935/0103-5053.20150034

Cited by 2 publications

(5 citation statements)

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“…The known chalcones ( 4 – 8 ) were also reported to show cytotoxicity . In combination with the reported data, it seems that chalcones with alkylated chain at ring A ( 7 ) possessed lower cytotoxicity than those with alkylated group at ring B ( 1 – 6 and 8 ) . However, it is necessary to do further research to clarify the structure–activity relationship.…”

Section: Resultsmentioning

confidence: 64%

“…The known compounds were identified as 2 0 ,4dihydroxy-3,4 0 -dimethoxychalcone (4), [17] oxyphyllumchalcone C (5), [18] renifolin C (6), [19] isobavachalcone (7), [20] [21] kanzonol B (8), [22][23] (+)-fatouain A (9), [13] (-)-fatouain B (10), [13] glabralactone (11), [24] 1 0 ,2 0 -dehydromarmesin (12), [25] 8-hydroxyxanthyletin (13), [26] seseline (14), [27] dihydroxanthyletin (15), [28] 5,7-dihydroxy-6-prenyl coumarin (16), [29] 7-hydroxycoumarin (17), [30] and 7-hydroxy-5-methoxycoumarin (18), [31] resp., by comparing their spectroscopic data with those reported.…”

Section: Structure Elucidationmentioning

confidence: 99%

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New Cytotoxic Alkylated Chalcones from Fatoua villosa

Xue

Yang

et al. 2017

Chemistry & Biodiversity

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Three new alkylated chalcones, villosins A - C (1 - 3), five known analogues, together with ten known coumarins, were isolated from Fatoua villosa. The structures of the new compounds were elucidated by extensive spectroscopic analysis, including 1D-, 2D-NMR, and MS data. Compounds 1 - 3 showed cytotoxicity against five kinds of human tumor cell lines (NB4, A549, SHSY5Y, PC3, and MCF7) with IC values ranging from 1.4 ± 0.1 to 5.7 ± 0.3 μm.

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Section: Resultsmentioning

confidence: 64%

Section: Structure Elucidationmentioning

confidence: 99%

New Cytotoxic Alkylated Chalcones from Fatoua villosa

Xue

Yang

et al. 2017

Chemistry & Biodiversity

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“…Fig. 5 shows that OPL offers higher throughput than Fixed Packet Length (FPL) as studied in [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. These results correspond to throughput of N 1 for α = 1/3.…”

Section: Theoretical and Simulation Resultsmentioning

confidence: 91%

“…In order to enhance the throughput especially at low SNRs, channel coding is required in TWR [11][12][13]. Secure two way relaying has been suggested in [14][15][16][17][18][19][20]. Security aspects of TWR should be studied to avoid data recovery by a malicious node.The main contribution of the paper is to optimize packet length so that the throughput at node N 1 or N 2 is maximized.…”

mentioning

confidence: 99%

“…Security aspects of TWR should be studied to avoid data recovery by a malicious node.The main contribution of the paper is to optimize packet length so that the throughput at node N 1 or N 2 is maximized. In all previous studies, a Fixed Packet Length (FPL) is used [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. This is the first paper to suggest an Optimal Packet Length (OPL) for TWR with Energy Harvesting.The system model is presented in section 2.…”

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confidence: 99%

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Optimization of Packet Length for Two Way Relaying with Energy Harvesting

Alnwaimi¹,

Boujemâa²,

Arshad³

2019

IJCNC

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In this article, we suggest optimizing packet length for two way relaying with energy harvesting. In the first transmission phase, two source nodes N 1 and N 2 are transmitting data to each others through a selected relay R. In the second phase, the selected relay will amplify the sum of the signals received signals from N 1 and N 2 . The selected relay amplifies the received signals using the harvested energy from Radio Frequency (RF) signals transmitted by nodes N 1 and N 2 . Finally, N 1 will remove, from the relay's signal, its own signal to be able to decode the symbol of N 2 . Similarly, N 2 will remove, from the relay's signal, its own signal to be able to decode the symbol of N 1 . We derive the outage probability, packet error probability and throughput at N 1 and N 2 . We also optimize packet length to maximize the throughput at N 1 or N 2 .Signal to Noise Ratio (SNR) is the maximum of SNRs over all antennas. It is also possible to combine the signals of all antennas using Maximum Ratio Combining (MRC). The SNR will be the sum of all SNRs [1][2][3][4][5]. TWR with Energy Harvesting (EH) consists to use the Radio Frequency (RF) signal to charge the battery of nodes [6][7][8][9][10]. Relays with EH capabilities has been studied in [6][7][8][9][10]. In order to enhance the throughput especially at low SNRs, channel coding is required in TWR [11][12][13]. Secure two way relaying has been suggested in [14][15][16][17][18][19][20]. Security aspects of TWR should be studied to avoid data recovery by a malicious node.The main contribution of the paper is to optimize packet length so that the throughput at node N 1 or N 2 is maximized. In all previous studies, a Fixed Packet Length (FPL) is used [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. This is the first paper to suggest an Optimal Packet Length (OPL) for TWR with Energy Harvesting.The system model is presented in section 2. Section 3 gives the Cumulative Distribution Function (CDF) of SNR. Section 4 derives the PEP while section 5 gives the expression of OPL. Some numerical results are given in section 6. Conclusions are presented in section 7. System modelThe system model is shown in Fig. 1. There are two nodes N 1 and N 2 communicating information to each other through a relay R. Node N 1 transmits data to node N 2 and at the same time node N 2 is also communicating data to N 1 through relay R. N 1 and N 2 transmit over the same channel.

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Cytotoxic Chalcones fromDesmodium oxyphyllum

Cited by 2 publications

References 0 publications

New Cytotoxic Alkylated Chalcones from Fatoua villosa

New Cytotoxic Alkylated Chalcones from Fatoua villosa

Optimization of Packet Length for Two Way Relaying with Energy Harvesting

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