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A Miniaturized Triple-Band Implantable Antenna System for Bio-Telemetry Applications
Zada, Muhammad,Yoo, Hyoungsuk IEEE 2018 IEEE transactions on antennas and propagation Vol.66 No.12
<P>This communication presents a miniaturized triple band implantable antenna system for multiple biotelemetry applications, which operates at the industrial, scientific, and medical (ISM) band (902–928 MHz and 2400–2483.5 MHz) and the midfield band (1824–1980 MHz). These bands are intended for the function of data telemetry, wireless power transfer, and power saving. The recommended antenna system is comprised of two implantable devices, a capsule type for deep tissue implantation and a flat type for skin implantation. The volume of these devices is 647 mm<SUP>3</SUP> and 425.6 mm<SUP>3</SUP>, respectively. The compact size of the proposed antenna system is 21 mm<SUP>3</SUP> ( <TEX>$7\,\,\text {mm} \times 6 \,\,\text {mm} \times 0.5$</TEX> mm), which is the smallest size yet presented. The miniaturization is achieved by meandering the shape of the radiating patch, adding an open-end ground slot, and introducing a shorting pin between ground plane and radiating patch. In the proposed antenna, simulated bandwidth is 8.7% and 7.3% at the ISM bands and 8.2% at the midfield band, and the measured bandwidth in a saline solution is 14.7% and 24.8% at the ISM bands and 13.1% at the midfield band. Finally, a link budget is calculated at different data rates to specify a range for data telemetry.</P>
Shah Zada,Saleem Raza,Sikandar Khan,Arshad Iqbal,Zhang Kai,Aftab Ahmad,Midrar Ullah,Mohib Kakar,Pengcheng Fu,Haifeng Dong,Zhang Xueji 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.105 No.-
Heavy metals and other organic pollutants are the hazardous materials causing soil and water pollution,hence, bioremediation of these components is a matter of concern for environmental biotechnologists. Twenty one microalgal and cyanobacterial strains were evaluated for removal of copper from aqueoussolutions and soil containing 10 ppm copper. 5 out of 21 strains have shown comparatively higher toleranceto copper stress. The biosorption capabilities of all the five strains were assessed using techniqueslike ultraviolet (UV) spectrophotometers, scanning electron microscope (SEM), inductively coupledplasma mass spectrometry (ICP-MS), and confocal Microscopy. It was found that the five selected strainscould grow normally upon incubating with 20 ppm of Cu. Copper removal efficiencies of these microalgae(S. obliquus, A. braunii, C. fusca, L. JSC-1 and C. saccharophila in water were 99.9, 99.3, 97, 96.7, and 96%,while for soil was 73, 75, 71, 70, 68%, respectively. A minor leakage of nucleic acid and protein weredetected with time. Furthermore, no any visible morphological changes were observed after six daysof treatment, while minor changes were noticed after 12 days in water, and severe morphological deformationsoccurred after 24 days of bioremediation in soil. Our findings reveal that the selected microalgalstrains have high potential for Cu bioremediation at certain concentration for 12 days exposure fromwater and 24 from soil.
Contact problem for a stringer plate weakened by a periodic system of variable width slots
Minavar V. Mir-Salim-zada 국제구조공학회 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.62 No.6
We consider an elastic isotropic plate reinforced by stringers and weakened by a periodic system of rectilinear slots of variable width. The variable width of the slots is comparable with elastic deformations. We study the case when the slots faces get in contact at some area. Determination of parameters characterizing the partial closure of variable width slots is reduced to the solution of a singular integral equation. The action of the stringers is replaced with unknown equivalent concentrated forces at the points of their connection with the plate. The contact stresses and contact zone sizes are found from the solution of the singular integral equation.
Wang, Chonglong,Zada, Bakht,Wei, Gongyuan,Kim, Seon-Won Elsevier 2017 Bioresource technology Vol.241 No.-
<P><B>Abstract</B></P> <P>Isoprenoids comprise the largest family of natural organic compounds with many useful applications in the pharmaceutical, nutraceutical, and industrial fields. Rapid developments in metabolic engineering and synthetic biology have facilitated the engineering of isoprenoid biosynthetic pathways in <I>Escherichia coli</I> to induce high levels of production of many different isoprenoids. In this review, the stem pathways for synthesizing isoprene units as well as the branch pathways deriving diverse isoprenoids from the isoprene units have been summarized. The review also highlights the metabolic engineering efforts made for the biosynthesis of hemiterpenoids, monoterpenoids, sesquiterpenoids, diterpenoids, carotenoids, retinoids, and coenzyme Q<SUB>10</SUB> in <I>E</I>. <I>coli</I>. Perspectives and future directions for the synthesis of novel isoprenoids, decoration of isoprenoids using cytochrome P450 enzymes, and secretion or storage of isoprenoids in <I>E</I>. <I>coli</I> have also been included.</P> <P><B>Highlights</B></P> <P> <UL> <LI> This review covered production of isoprenoid in <I>E</I>. <I>coli</I> over decades. </LI> <LI> This review summarized progresses of pathway engineering for isoprenoid production. </LI> <LI> This review suggested three directions for isoprenoid production in the future. </LI> </UL> </P>
Nguyen, Huynh Quoc,Zada, Sahib,Lai, Trang Huyen,Pham, Trang Minh,Hwang, Jin Seok,Ahmed, Mahmoud,Kim, Deok Ryong Elsevier 2019 Neuroscience Letters Vol.701 No.-
<P><B>Abstract</B></P> <P>Oxidative damage in neurons including glutamate excitotoxicity has been linked to increasing numbers of neuropathological conditions. Under these conditions, cells trigger several different cellular responses such as autophagy, apoptosis, necrosis and senescence. However, the connection between these responses is not well understood. In this study, we found that the 60-kDa BECN1 was specifically degraded to a 40-kDa fragment in hippocampal HT22 cells treated with 5 mM glutamate. Increased BECN1 cleavage was specifically associated with a decrease in cell viability under oxidative stress. Interestingly, this BECN1 cleavage was specifically inhibited by a calpain inhibitor ALLN but was not affected by other protease inhibitors. Also, the BECN1 cleavage was not detected in calpain-4-deficient cell lines. Furthermore, calpain cleaved BECN1 at a specific site between the coiled-coil domain and Bcl2 homology 3 domain, which is associated with the anti-apoptotic protein Bcl-2. Moreover, some cellular senescence markers, including β-galactosidase, p21, p27<SUP>Kip1</SUP>, p53 and p16<SUP>INK4A</SUP>, increased proportionally to those of BECN1 cleaved fragments. These results suggest that calpain-mediated BECN1 cleavage under oxidative conditions is specifically associated with cell death induced by cellular senescence.</P> <P><B>Highlights</B></P> <P> <UL> <LI> BECN1 was specifically degraded to a 40-kDa fragment accompanying with decrease of cell viability under oxidative stress. </LI> <LI> BECN1 cleavage was inhibited by calpain inhibitor but not by other protease inhibitors. </LI> <LI> Calpain cleaves BECN1 at a specific site between CCD and BH3 domains. </LI> <LI> BECN1 degradation stimulates senescence-associated cell death at the oxidative stress. </LI> </UL> </P>