Sound Wave Exposure as a Strategy for Improving the Tubular Photobioreactor for Cultivating Synechococcus HS-9 as Biofuel Feedstock under Different Photoperiods

Abstract Research in termoacoustics began with the observation of the heat transfer between gas and solids. Using this interaction the intense sound wave could be applied to create engines and heat pumps. The most important part of thermoacoustic devices is a regenerator, where press of conversion of sound energy into thermal or vice versa takes place. In a heat pump the acoustic wave produces the temperature difference at the two ends of the regenerator. The aim of the paper is to find the influence of the material used for the construction of a regenerator on the properties of a thermoacoustic heat pump. Modern technologies allow us to create new materials with physical properties necessary to increase the temperature gradient on the heat exchangers. The aim of this paper is to create a regenerator which strongly improves the efficiency of the heat pump.

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Faculty Opinions recommendation of Downregulation of GAUT12 in Populus deltoides by RNA silencing results in reduced recalcitrance, increased growth and reduced xylan and pectin in a woody biofuel feedstock.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.725418867.793514325 ◽

2016 ◽

Author(s):

Elizabeth Hood

Keyword(s):

Rna Silencing ◽

Populus Deltoides ◽

Biofuel Feedstock

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Pengaruh Variasi Waktu Paparan Gelombang Ultrasonik dalam Mengurangi Jumlah Bakteri coliform pada Sampel Air Sungai Kahayan

Risalah Fisika ◽

10.35895/rf.v4i1.168 ◽

2020 ◽

Vol 4 (1) ◽

pp. 9-13 ◽

Cited By ~ 1

Author(s):

Neny Kurniawati, Kerelius, Sunariyati ◽

Luqman Hakim, Dyah Ayu Pramoda Wardani, Widya Krestina ◽

Dwi Tyas Setiawan, Ferry Purwanto, Diah K. Fatmala

Keyword(s):

Water Treatment ◽

River Water ◽

Ultrasonic Wave ◽

Exposure Time ◽

Water Samples ◽

Sampling Technique ◽

Wave Exposure ◽

Test Results ◽

Time Data ◽

Grab Sampling

Abstrak – Penelitian ini bertujuan untuk mengkaji pengaruh waktu paparan gelombang ultrasonik terhadap pengurangan jumlah koloni bakteri coliform pada sampel air sungai Kahayan. Pengambilan sampel air sungai dilakukan dengan teknik Grab Sampling menggunakan alat Kemmerer Sampler. Sampel air yang didapatkan diberikan paparan gelombang ultrasonik secara langsung, tanpa merubah kondisi lingkungan awal. Waktu paparan divariasikan pada 1 jam, 2 jam, 3 jam, 4 jam, dan 5 jam dengan frekuensi 40 kHz untuk memperoleh data waktu optimum. Uji coliform dilakukan dengan metode MPN, dengan tahapan uji pendugaan, uji penegasan, dan perhitungan koloni. Hasil uji MPN 24 jam setelah paparan menunjukkan bahwa penggunaan ultrasonik sebagai antibateri dapat optimum ketika diberikan paparan dengan waktu 3 jam, dengan efisiensi 96%. Kata kunci: antibakteri, coliform, ultrasonik, water treatment, sungai Kahayan Abstract – This study aims to examine the effect of ultrasonic wave exposure time on reducing the number of coliform bacterial colonies in the Kahayan river water samples. River water sampling is done using the Grab Sampling technique using the Kemmerer Sampler tool. The water samples obtained were given direct ultrasonic wave exposure, without changing the initial environmental conditions. The exposure time is varied in 1 hour, 2 hours, 3 hours, 4 hours and 5 hours with a frequency of 40 kHz to obtain optimum time data. Coliform test was carried out by the MPN method, with the stages of the estimation test, affirmation test, and colony calculation. The MPN test results 24 hours after exposure showed that the use of ultrasonic as an antibody can be optimum when given exposure with a time of 3 hours, with an efficiency of 96%.Keywords : antibakterial, coliform, ultrasonic, water treatment, Kahayan river

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DLA Energy Biofuel Feedstock Metrics Study

10.21236/ada575119 ◽

2012 ◽

Author(s):

Jeremey M. Alcorn ◽

Virginia A. Bostock ◽

Stuart Funk ◽

Karen M. Hagberg ◽

James Hardison ◽

...

Keyword(s):

Biofuel Feedstock

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The Diffraction of a Progressive Sound Wave by the Human Head

The Journal of the Acoustical Society of America ◽

10.1121/1.1902519 ◽

1947 ◽

Vol 19 (1) ◽

pp. 290-291

Author(s):

Francis M. Wiener

Keyword(s):

Sound Wave ◽

Human Head

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Non-equilibrium effective field theory and second sound

Journal of High Energy Physics ◽

10.1007/jhep04(2021)213 ◽

2021 ◽

Vol 2021 (4) ◽

Author(s):

Michael J. Landry

Keyword(s):

Field Theory ◽

Effective Field Theory ◽

Sound Wave ◽

Effective Field ◽

Second Sound ◽

Gauge Symmetries ◽

Sound Modes ◽

State Of Matter ◽

The Difference ◽

Non Equilibrium

Abstract We investigate the phenomenon of second sound in various states of matter from the perspective of non-equilibrium effective field theory (EFT). In particular, for each state of matter considered, we find that at least two (though sometimes multiple) qualitatively different EFTs exist at finite temperature such that there is always at least one EFT with a propagating second-sound wave and at least one with no such second-sound wave. To aid in the construction of these EFTs, we use the method of cosets developed for non-equilibrium systems. It turns out that the difference between the EFTs with and without second-sound modes can be understood as arising from different choices of a new kind of inverse Higgs constraint. Finally, we demonstrate that it is possible to bypass the need for new inverse Higgs constraints by formulating EFTs on a new kind of manifold that is like the usual fluid worldvolume, but with reduced gauge symmetries.

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