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Advances in Infectious Diseases 2020年第3期10卷 56-66页

作者： zameer shervani Intazam Khan Umair Yaqub Qazi Nanomaterials Production Division Food and Energy Security Research and Product Centre Sendai Japan Department of Neurology North Shore University Hospital New York USA Department of Neurology and Neuroscience Weill Cornell Medical Cornell University New York USA Chemistry Department College of Science University of Hafar Al Batin Hafar Al Batin KSA

The novel coronavirus (SARS-Cov-2) delayed the Tokyo 2020 Games. The traveling by air, rail, road, and sea inside and outside the countries has stopped to contain the virus. The amount of money lost and assistance needed to reschedule and conduct the Games in 2021 have been estimated. With more than one billion population is under the semi-locked down and movement of people is restricted, athletes cannot prepare at home and participate in the Games. The COVID-19 outbreak has spread around the world;it has already infected 5.7 million people and caused 355,000 deaths reported on May 28, 2020 and the figures increasing every day. The publication of this article is important as the postponement of the Olympics has costed Japan $6 billion and the organizers have worked very hard for seven years. If the Games are conducted in 2021, it will be the—beginning of the world recovery—from big COVID-19 pandemic. In this communication, the development in testing, treatment, and vaccine preparation for SARS-Cov-2 have occurred so far in different countries and companies have been discussed to know the possibilities if the pandemic can be overcome and the Games can be conducted in 2021.

关键词： COVID-19 SARS-Cov-2 Tokyo 2020 Olympics COVID-19 Detection SARS-Cov-2 Treatment COVID-19 Vaccine

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COVID-19 Vaccine

Advances in Infectious Diseases 2020年第3期10卷 195-210页

作者： zameer shervani Intazam Khan Tasrina Khan Umair Yaqub Qazi Nanomaterials Production Division Food and Energy Security Research and Product Centre Sendai Japan Department of Neurology North Shore University Hospital Northwell Health Manhasset New York USA Department of Neurology and Neuroscience Weill Cornell Medical College New York USA Flushing Hospital Medical Center Flushing New York USA Biology Department University at Buffalo Buffalo USA Chemistry Department College of Science University of Hafar Al Batin Hafar Al Batin KSA

A number of companies have announced the vaccines for COVID-19 pandemic that has caused extreme poverty, famine, and more than a billion people have lost livelihood all across the globe. Mass production of vaccine Sputnik V is underway at different locations to inoculate population in Russia, Philippines, Vietnam, Brazil, Saudi Arab, and United Arab Emirates (UAE), and India. mRNA based vaccine of Pfizer-BioNTech after passing phase 2 trial is ready for testing on thousands of volunteers. Oxford University-AstraZeneca vaccine is also under phase 3 trial in US, Brazil, and India. In September, Novavax Inc.’s vaccine will be ready for phase 3 trial. By early next year, two billions of doses will be ready of Novavax. Moderna Therapeutics conducting vaccine trial on 30 thousands volunteers, results will be known soon. Hundreds of thousand volunteers have registered already for vaccination in US and other parts of the world. SinoVac Biotech Ltd. has prepared a vaccine “CoronaVac” and inoculating volunteers in Indonesia and Brazil. CanSino Biologics Inc. in phase 2 trial on 508 volunteers found a satisfactory immune response to COVID-19 virus. Apart from vaccine preparation and availability, we provided data for therapy and treatment for COVID-19 and transmission and stability aspect of COVID-19 SARS-Cov-2 virus. The data and results presented in this article are very important and useful in containing, treating, and eliminating the pandemic COVID-19.

关键词： COVID-19 Vaccine Plasma Therapy COVID-19 Transmission SARS-Cov-2 in Feces COVID-19 in Pets Community Transmission Super Spreader

World’s Fastest Supercomputer Picks COVID-19 Drug

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Advances in Infectious Diseases 2020年第3期10卷 211-225页

作者： zameer shervani Intazam Khan Tasrina Khan Umair Yaqub Qazi Nanomaterials Production Division Food and Energy Security Research and Product Centre Sendai Japan Department of Neurology North Shore University Hospital Northwell Health Manhasset NY USA Department of Neurology and Neuroscience Weill Cornell Medical College New York NY USA Flushing Hospital Medical Center Flushing NY USA Biology Department University at Buffalo Buffalo USA Chemistry Department College of Science University of Hafar Al Batin Hafar Al Batin KSA

We have demonstrated the application of the world’s fastest supercomputer Fugaku located in Japan to select the COVID-19 drugs and stopping the pandemic spread. Using computer simulation out of 2128 potential drug candidates, the world’s fastest supercomputer picked 30 most effective and potential drugs. Twelve of them are under clinical trials outside Japan;some are being tested in Japan. The computer reduced the computation time from one year to 10 days when compared to second superfast computer of the world. Fugaku supercomputer was employed to know the behavior of airborne aerosol COVID-19 virus. 3Cs were suggested: avoid closed and crowded spaces and contacts to stop the pandemic spread. The progress in vaccine development and proper use and type of mask has also been described in this article. The article will benefit greatly to stop spreading and treating the pandemic COVID-19.

关键词： COVID-19 Drug World’s Fastest Supercomputer Fugaku Supercomputer COVID-19 Treatment COVID-19 Prevention

Preparation of Gold Nanoparticles Loaded Chitin Nanofiber Composite

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Advances in Nanoparticles 2012年第3期1卷 71-78页

作者： zameer shervani Yukawa Taisuke Shinsuke Ifuku Hiroyuki Saimoto Minaru Morimoto Department of Chemistry and Biotechnology Graduate School of Engineering Tottori University Tottori Japan Research Center for Bioscience and Technology Tottori University Tottori Japan

Chitin nanofibers (CNFs) processed from second most abundant biomolecule chitin were loaded with gold metallic nanoparticles (Au NPs) to obtained hybrid organic-inorganic composite which was molded in different forms dispersion, flakes, powder, and transparent thin film. First pre-organized Au NPs were prepared in soluble triblock copolymer poly (methyl vinyl ether) (PMVE) by reduction of gold precursor salt (HAuCl43H2O) by NaBH4 then NPs were mixed with diluted CNFs suspension to obtain CNFs-Au NPs composite. CNFs of width 25 - 40 nm were prepared by combination of chemical and mechanical processing in wet acidic condition from 1 wt% crab shell chitin slurry. When polymer stabilized Au NPs blended with CNF suspension, all Au NPs and 56% polymer were found mass transferred from water phase to entangle with more polar moieties of chitin. Composite’s suspension and compressed dried film were characterized by recording digital images, UV-vis, TEM, SEM, and XRD spectroscopies. When 70 m thin non transparent composite film was impregnated with tricyclodecane dimethanol dimethacrylate (TCDDMA) resin and subsequent polymerized with photoinitiator 2-hydroxy-2-methylpropiophenone, the film became transparent due to filling of nanosized CNFs in the cages of the resin.

关键词： Chitin Nanofibers CNFs-Gold Nanocomposites Gold Nanopartilces Soluble Polymer

Formation and Growth of Silver Nanocubes upon Nanosecond Pulsed Laser Irradiation: Effects of Laser Intensity and Irradiation Time

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Advances in Nanoparticles 2017年第4期6卷 148-157页

作者： Umair Yaqub Qazi zameer shervani Rahat Javaid Shinji Kajimoto Hiroshi Fukumura Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at Microscale University of Science and Technology of China Hefei China Nanomaterials Production Division Food and Energy Security Research and Product Center Sendai Japan Fukushima Renewable Energy Institute National Institute of Advanced Industrial Science and Technology AIST Fukushima Japan Department of Chemistry Graduate School of Science Tohoku University Sendai Japan

Silver nanoparticles (AgNPs) were fabricated by repetitive irradiation of near ultraviolet (UV) nanosecond laser pulses (355 nm, 5 ns) in an aqueous solution of silver nitrate in the absence of stabilizing agents. A broad absorption peak was observed in the visible region showing the formation of a variety of AgNPs in the solution. Among the variety of products, it was found that silver nanocubes (AgNCs) grew in size with longer laser irradiation time. The size of AgNCs also increased with higher laser intensity. The average size of AgNCs, investigated by a scanning electron microscope (SEM) was in the range of 75 - 200 nm. The number of reduced atoms in AgNCs as a function of laser intensity showed that the AgNCs are apparently produced by a four photon process, implying that the formation of dimer silver atoms is essential for the formation.

关键词： Nanosecond Laser Silver Nanocubes Nanoparticle Synthesis Laser Intensity Irradiation Time

Morphology Observation of Novel 3, 4-Bis-Alkyloxycarbonyl-Hexanedioic Acid Monolayer on Water Surface by Dropping Method

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Journal of Biophysical Chemistry 2016年第2期7卷 43-48页

作者： Yusuke Kobayashi Rina Hirai Daiki Ito Yasushi Yamamoto Keijiro Taga zameer shervani Department of Life Science and Material Engineering Nagoya Institute of Technology Nagoya Japan Department of Life Science and Material Engineering Nagoya Institute of Technology Nagoya Japan 2Tohoku Foods Corporation Limited Sendai Japan Tohoku Foods Corporation Limited Sendai Japan

We have investigated the morphology of novel 3, 4-bis-alkyloxycarbonyl-hexanedioic acid monolayer (alkyl chain number n = 12, 14, and 16) formed on the water surface by dropping method using Surface Tension measurement (STm) and Brewster Angle Microscopy (BAM). Surfactant of 3, 4-bis-alkyloxycarbonyl-hexanedioic acid has a gemini type structure. π-A isotherm curves (STm) of two gemini surfactants of n = 12 and 14 showed gradual increase in surface pressure, while that of n = 16 showed gradual increase, a stagnant range and finally steep increase. BAM observation showed each image corresponding to the result of STm measurement. From STm and BAM results of surfactants, it is found that surfactant of n = 12 and 14 form Liquid-Expand (LE) type monolayer, while that of n = 16 formed Liquid-Condensed (LC) type monolayer including LE-LC phase transition.

关键词： 3 4-Bis-Alkyloxycarbonyl-Hexanedioic Acid Gemini Surfactants Gemsurfs Monolayer Morphology

Surface Properties of Novel Surfactant, Dihexadecyl Gemini Phosphate, Monolayers on Water Surface by Dropping Method

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Journal of Biophysical Chemistry 2017年第4期8卷 39-50页

作者： Yusuke Kobayashi Takahiko Amano Keijiro Taga Yasushi Yamamoto zameer shervani Masato Yamamoto Department of Life Science and Applied Chemistry Graduate School of Engineering Nagoya Institute of Technology Nagoya Japan Nanomaterials Production Division Food and Energy Security Research and Product Center Sendai Japan Department of Chemistry School of Arts and Sciences Showa University Yamanashi Japan

We have synthesized first novel dihexadecyl phosphate (DHGP-n) gemini surfactants containing alkyl chain ((CnH2n);n = 3, 4, 5, and 6) spacers. Surfactants were used to form monolayers on water surface. Surface tension measurement (STm), Brewster angle microscopy (BAM), and density functional theory (DFT) calculation were used to investigate these monolayers. Surface pressure (π) and molecular area (A);π-A isotherm curves of all DHGP-n gemini surfactants showed a gradual increase in surface pressure without any break points in the curves, confirmed the formation of liquid-expand (LE) type monolayers. BAM observations also supported the STm results. Limited molecular area (A0) of these monolayers depended on the spacer of gemini surfactants without spacer n = 4. Longer alkyl chain spacer in the series had higher value of A0 in π-A isotherm plots. In the series, A0 of spacer n = 4 was smallest among A0 values of other spacers. Density functional theory (DFT) method calculation also confirmed π-A isotherm curves pattern of these surfactants. Calculation showed that both odd and even numbers and length of the alkyl chain spacer influenced the structure of DHGP-n monolayer formation on the water surface.

关键词： Dihexadecyl Gemini Phosphates Monolayers Surface Tension Measurement Brewster Angle Microscopy Density Functional Theory Calculation

Structural Change in Dimyristoyl Phosphatidyl Choline (DMPC) Molecule Alkyl Chains on the Addition of Cholesterol to DMPC Monolayer: Specific Addition Effect of Cholesterol

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Journal of Biophysical Chemistry 2019年第2期10卷 15-29页

作者： Daiki Ito Takanari Ikeda Keijiro Taga Yasushi Yamamoto zameer shervani Masato Yamamoto Department of Life Science and Applied Chemistry Graduate School of Engineering Nagoya Institute of Technology Nagoya Aichi Japan Nanomaterials Production Division Food and Energy Security Research and Product Center Sendai Japan Department of Chemistry School of Arts and Sciences Showa University Kamiyoshida Fujiyoshida Yamanashi Japan

We have investigated the morphology of dimyristoyl phosphatidyl choline (DMPC)—cholesterol mixed monolayer formed on the water surface by dropping method using surface tension measurement (STm), Brewster angle microscopy (BAM), and infrared external reflection spectroscopy (IERS). STm results showed negative deviation of the limiting molecular area (A0) of cholesterol occurred when cholesterol was added to the DMPC monolayer. BAM images showed the expandable DMPC monolayer changed to the condensed rigid monolayer at more than cholesterol mole fraction (xChol) 0.4. IERS recordings showed that the addition of cholesterol at xChol = 0.4 occurred structural change from gauche- to trans- conformation of two DMPC molecule alkyl chains. From these results, it is found that cholesterol molecule has specific properties that cause structural transition of DMPC molecule alkyl chains.

关键词： Dimyristoyl Phosphatidyl Choline (DMPC) Cholesterol Surface Tension Measurement (STm) Brewster Angle Microscopy (BAM) Infrared External Reflection Microscopy (IERS) Structural Transition

Study of physisorption of volatile anesthetics on phos-pholipid monolayers using a highly sensitive quartz crystal microbalance (HS-QCM)

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Journal of Biophysical Chemistry 2011年第2期2卷 68-74页

作者： Yasushi Yamamoto zameer shervani Takatsugu Shimoaki Daisuke Yoshida Takashi Yokoyama Tadayoshi Yoshida Keijiro Taga Hiroshi Kamaya Issaku Ueda 不详

We have investigated the interactions between phospholipid monolayers and volatile anest-hatics. Two monolayers (dihexadecyl phosphate (DHP) and dipalmitoyl phosphatidyl choline (DPPC) and two anesthetics (halothane and enflurane) were used to observe these interac-tions using a highly sensitive quartz crystal microbalance (HS-QCM). The concentration of each anesthetic in aqueous solution was kept at 4 mM. The frequency of QCM showed no change when halothane was added to the DHP monolayer, however, it responded and de-creased when interaction occurred with DPPC monolayer. In case of enflurane addition the frequency decreased in both the monolayers of DHP and DPPC. The frequency change followed the following order of monolayer-anesthetic interactions: DHP-halothane

关键词： Physisorption Phospholipid Monolayers Quartz Crystal Microbalance (QCM) Anesthetic Hydrate Monolayer-Water Interface

Physical Properties in Aqueous Solutions for a Series of Alkyltrimethylammonium Salicylates (C12TA-Sal through C16TA-Sal): From a View Point of Drag Reduction

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Soft Nanoscience Letters 2016年第4期6卷 45-55页

作者： Yasushi Yamamoto Takashi Arai Takashi Tomita zameer shervani Akihiro Yoshino Keijiro Taga Shinji Tamano Motoyuki Itoh Yoshitaka Taguchi Graduate School of Engineering Nagoya Institute of Technology Nagoya Japan Chukyo Yushi Co. Ltd. Nagoya Japan

Compounds for a series of alkyltrimethylammonium salicylates (C12TA-Sal through C16TA-Sal) were synthesized. Their physical properties in aqueous solutions were investigated by conductometry, viscometry, vortex inhibition, viscoelastic recoil and swirling decay time from a view point of drag reduction. For critical micelle concentrations (CMC) obtained for a series of compounds by conductometry, it was found that a linear relation of the form, log(CMC)= 4.088﹣0.305*Nc (Nc: carbon number in the alkyl chain), holds. From the viscosity measurement, all the compounds showed viscosity increase above their CMC. Vortex inhibition was observed above the CMC for the compounds with the chain length longer than C13. Viscoelastic recoil was observed above the concentration of one and a half times the CMC for the compounds with alkyl chain length longer than C14.

关键词： Drag Reduction Vortex Inhibition Viscoelastic Recoil CMC