Astaxanthin production by Xanthophyllomyces dendrorhous growing on a low cost substrate

2019 ◽  
Vol 94 (4) ◽  
pp. 1229-1234 ◽  
Author(s):  
Teresa Gervasi ◽  
Antonello Santini ◽  
Patricia Daliu ◽  
Abdelfattah Z. M. Salem ◽  
Claudio Gervasi ◽  
...  
Keyword(s):  
Low Cost ◽  
Xanthophyllomyces Dendrorhous ◽  
Astaxanthin Production ◽  
Low Cost Substrate

scholarly journals LOW COST SUBSTRATE BASED COMPACT ANTENNAS FOR 4G/5G SIDE-EDGE PANEL SMARTPHONE APPLICATIONS

2020 ◽  
Vol 91 ◽  
pp. 145-152
Author(s):  
Issmat Shah Masoodi ◽  
Insha Ishteyaq ◽  
Khalid Muzaffar ◽  
Muhammad Idrees Magray
Keyword(s):  
Low Cost ◽  
Smartphone Applications ◽  
Side Edge ◽  
Low Cost Substrate ◽  
Compact Antennas

Fractal-based triangular bandpass filter with a notched band for interference rejection in wideband applications

Circuit World ◽  
2019 ◽  
Vol 45 (3) ◽  
pp. 141-147 ◽  
Author(s):  
Karthie S. ◽  
Salivahanan S.
Keyword(s):  
Communication Systems ◽  
Bandpass Filter ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Low Cost ◽  
Area Network ◽  
Interference Rejection ◽  
Content Type ◽  
Notched Band ◽  
Low Cost Substrate

Purpose This paper aims to present the design of a novel triangular-shaped wideband microstrip bandpass filter implemented on a low-cost substrate with a notched band for interference rejection. Design/methodology/approach The conventional dual-stub filter is embedded with simple fractal-based triangular-circular geometries through various iterations to reject wireless local area network (WLAN) signals with a notched band at 5.8 GHz. Findings The filter covers a wide frequency band from 3.1 to 8.8 GHz and has a fractional bandwidth of 98 per cent with the lower passband of 57.5 per cent and upper passband of 31.6 per cent separated by a notched band at 5.8 GHz. The proposed wideband prototype bandpass filter is fabricated in FR-4 substrate using PCB technology and the simulation results are validated with measurement results which include insertion loss, return loss and group delay. The fabricated filter has a sharp rejection of 28.3 dB at 5.8 GHz. Measured results show good agreement with simulated responses. The performance of the fractal-based wideband filter is compared with other wideband bandpass filters. Originality/value In the proposed work, a fractal-based wideband bandpass filter with a notched band is reported. The conventional dual-stub filter is deployed with triangular-circular geometry to design a wideband filter with a notched band to suppress interference signals at WLAN frequency. The proposed wideband filter exhibits smaller size and better interference rejection compared to other wideband bandpass filter designs implemented on low-cost substrate reported in the literature. The aforementioned wideband filter finds application in wideband wireless communication systems.

Citrus Residues Isolates Improve Astaxanthin Production by Xanthophyllomyces dendrorhous

2010 ◽  
Vol 65 (9-10) ◽  
pp. 594-598 ◽  
Author(s):  
Wei Wu ◽  
Mingbo Lu ◽  
Longjiang Yu
Keyword(s):  
Carbon Source ◽  
Yeast Extract ◽  
Minimal Medium ◽  
Wild Strain ◽  
Xanthophyllomyces Dendrorhous ◽  
Citrus Juice ◽  
Astaxanthin Production ◽  
Mutant Strains

The wild strain and two astaxanthin-overproducing mutant strains, W618 and GNG274, of Xanthophyllomyces dendrorhous were analyzed in order to assess their ability to grow and synthesize astaxanthin in a minimal medium containing (per liter): 2 g KH2PO4, 0.5 g MgSO4, 2 g KNO3, and 1 g yeast extract, and supplemented with citrus residues isolates as a carbon source (citrus medium). The selected strain W618 was evaluated under various contents of citrus juice. At the content of 20% (v/v), the highest astaxanthin production reached 22.63 mg L-1, which was two-fold more than that observed in yeast malt medium. Addition of 8% (v/v) n-hexadecane to the citrus medium was found to be optimal, increasing the astaxanthin yield by 21.7%.

A stretchable smart and highly efficient radio frequency antenna on low cost substrate

2018 ◽  
Vol 60 (7) ◽  
pp. 1798-1803 ◽  
Author(s):  
S. Deepa Nivethika ◽  
B. S. Sreeja ◽  
E. Manikandan ◽  
S. Radha
Keyword(s):  
Radio Frequency ◽  
Low Cost ◽  
Highly Efficient ◽  
Low Cost Substrate
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