Contactless Resonant Cavity Dielectric Spectroscopic Studies of Cellulosic Paper Aging

Kombolias, Mary; Obrzut, Jan; Postek, Michael T.; Poster, Dianne L.; Obeng, Yaw S.

doi:10.1080/00032719.2019.1655648

Cited by 6 publications

(8 citation statements)

References 33 publications

(35 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…LTCL provides easier sample preparation as phages and E. coli were co-incubated together, without additional step before filtration. This mode of sample preparation for the detection of target bacteria using phages has also been documented in several studies [7,21]. However, major drawbacks for LTCL were noticed as the relative insensitive detection limit at10 3 CFU/ml.…”

Section: Plos Onementioning

confidence: 57%

See 1 more Smart Citation

Rapid detection of Escherichia coli using bacteriophage-induced lysis and image analysis

Wisuthiphaet

Young

et al. 2020

PLoS ONE

View full text Add to dashboard Cite

Rapid detection of bacterial pathogens is a critical unmet need for both food and environmental samples such as irrigation water. As a part of the Food safety Modernization Act (FSMA), The Produce Safety rule has established several requirements for testing for the presence of generic Escherichia coli in water, but the current method available for testing (EPA M1603) demands specified multiple colony verification and highly trained personnel to perform these tests. The purpose of the study was to assess a phage induced bacterial lysis using quantitative image analysis to achieve rapid detection of E. coli at low concentrations within 8 hours. This study aimed to develop a simple yet highly sensitive and specific approach to detect target bacteria in complex matrices. In the study, E. coli cells were first enriched in tryptic soy broth (TSB), followed by T7 phage induced lysis, concentration, staining and fluorescent imaging. Image analysis was conducted including image pre-processing, image segmentation and quantitatively analysis of cellular morphological features (area, eccentricity and full width at half maximum). Challenge experiments using realistic matrices, including simulated fresh produce wash water, coconut water and spinach wash water, demonstrated the method can be applied for use in situations that occur in food processing facilities. The results indicated E. coli cells that are lysed by T7 phages demonstrated significantly (P < 0.05) higher extracellular DNA release, altered cellular shape (from rod to circular) and diffused fluorescent signal intensity. Using this biosensing strategy, a sensitivity to detect Escherichia coli at 10 CFU/ml within 8 hours was achieved, both in laboratory medium and in complex matrices. The proposed phage based biosensing strategy enables rapid detection of bacteria and is applicable to analysis of food systems. Furthermore, the steps involved in this assay can be automated to enable detection of target bacteria in food facilities without extensive resources.

show abstract

Section: Plos Onementioning

confidence: 57%

“…The dynamic morphological change of E. coli and release of eDNA were analyzed through LTCL during extended lysis period as reported earlier [7,21]. Briefly, overnight E. coli BL21 cultures were precipitated, washed and resuspended in PBS.…”

Section: E Coli Cellular Morphological Change and Edna Release Durinmentioning

confidence: 99%

Rapid detection of Escherichia coli using bacteriophage-induced lysis and image analysis

Wisuthiphaet

Young

et al. 2020

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…We suggest that non-contact BDS may be a better metrology for such a sensing application [31]. We have independently investigated and characterized cellulosic paper [32,33], which, when combined with metal oxides, could be suitable for costeffective microwave monitored gas sensing applications. From our experience, the paper substrate for metal oxide support must be carefully chosen for BDS monitoring.…”

Section: Metal Oxides In Gas Sensingmentioning

confidence: 99%

Broadband Microwave Signal Dissipation in Nanostructured Copper Oxide at Air‐film Interface**

et al. 2020

Self Cite

View full text Add to dashboard Cite

Contactless broadband microwave spectroscopy (a.k.a., broadband dielectric spectroscopy (BDS)) enables the accurate operando analysis of the electrical and magnetic properties without compromising the kinetic conditions of the experiment. The BDS method is sensitive to the actual electronic structure of species, and it is most relevant to redox reactions involving chargetransfer. In this paper, using BDS, we have studied and characterized the oxidation of a copper layer in a purposely built prototypical 3-D integrated circuit (3D-IC) during cycled high-temperature storage. We show that the microwave signal loss in these devices is attributable to the energy dissipation through the signal's interactions with the copper oxidation product. The results demonstrate that contactless BDS could be leveraged into an excellent metrology for applications that use metal oxide as sensing elements.

show abstract

“…Pengamatan mengenai sifat dielektrik telah dilakukan oleh berbagai peneliti untuk berbagai aplikasi, seperti pada pengukuran konstanta dielektrik material kain selulosa (8)(9)(10)(11)(12)(13), material kain protein (14)(15)(16)dan serat sintetis (17)(18)(19)(20). Sifat dielektrik pada material kain telah diamati dalam kaitannya dari upaya untuk mengurangi fenomena listrik statis pada bahan material tekstil (21) Pada penelitian ini telah dilakukan pengukuran konstanta dielektrik kain rajut pakan dengan jenis bahan baku dan jenis kerapatan jeratan rajutan yang berbeda.…”

Section: Pendahuluanunclassified

“…Besar perubahan nilai tegangan perangkat kapasitor plat sejajar terhadap satuan waktu pada proses charging dapat dituliskan sesuai dengan persamaan (2) [9].…”

Section: Materials Dan Instrumenunclassified

Studi Pengukuran Konstanta Dielektrik Kain Rajut Pakan Poliester Dan Katun Menggunakan Metode Kapasitansi Perangkat Kapasitor Plat Sejajar

Munandar

Putra

Wardiningsih

2020

j. kumparan fis. j. teach. phys.

View full text Add to dashboard Cite

Pada penelitian ini telah dilakukan penentuan konstanta dielektrik material kain rajut pakan menggunakan metode kapasitansi perangkat kapasitor plat sejajar. Kain rajut pakan telah dibuat dengan menggunakan mesin rajut datar Stoll tipe CMS 530HP. Enam sampel kain rajut poliester dan katun telah dibuat pada mesin rajut terkomputerisasi dengan kerapatan yang berbeda-beda. Terdapat tiga jenis kerapatan kain rajut yang telah dibuat pada penelitian ini. Pengukuran kapasitansi terdiri dari perangkat mikrokontroler Arduino Uno dan susunan seri resistor-kapasitor (RC). Hasil penelitian menunjukan bahwa kain rajut katun NP10 memiliki konstanta dielektrik yang lebih besar dibandingkan dengan kain poliester pada struktur kain yang sama. Hasil menunjukan korelasi yang cukup baik antara hasil prediksi dan eksperimen pada pengukuran kapasitansi. Terdapat enam bahan dielektrik yang ditentukan dengan hasil dari yang terbesar sampai yang terkecil berturut-turut yaitu kain rajut katun NP 10 (22,8874 + 4,6388), kain rajut katun NP 11 (21,4717 + 3,8064), kain rajut katun NP 12 (17,8721 + 2,3233), kain rajut poliester NP 10 (9,7751 + 2,4922), kain rajut poliester NP 11 (8,8282 + 0,9360) dan kain rajut poliester NP 12 (8,4358 + 1,1849). Telah ditemukan hubungan antara parameter kerapatan kain kain rajut pakan terhadap nilai konstanta dielektrik terukur. Kata kunci—kain rajut pakan, poliester, katun, kerapatan kain, konstanta dielektrik, kapasitor plat-sejajar. ABSTRACT This paper describes the dielectric measurement of weft knitted fabric using parallel-plate capacitance method. The weft knitted fabric were fabricated using weft knit machine Stoll CMS 530HP. Six different samples of polyester and cotton knitted fabric were fabricated by computerized flat knitting machine. There are consist of three types of density which made on this study. The capacitance measurement were consist of Arduino Uno microcontroller and a series of resistor-capacitor (RC). The result of this research indicates that NP10 cotton knitted fabric has higher dielectric constant than the polyester knitted fabric, with similar structure respectively. There are six fabric dielectric materials that are determined with the results from the largest to the smallest in a row namely NP 10 cotton knitted fabric (22,8874 + 4,6388), NP 11 cotton knitted fabric (21,4717 + 3,8064), NP 12 cotton knitted fabric (17,8721 + 2,3233), NP 10 polyester knitted fabric (9,7751 + 2,4922), NP 11 polyester knitted fabric (8,8282 + 0,9360) and NP 12 polyester knitted fabric (8,4358 + 1,1849). It has been found the correlation between the fabric density and the permittivity of the weft knitted fabric. Keywords—weft knitted fabric, polyester, cotton, fabric density, dielectric constant, parallel-plate capacitor.

show abstract

Contactless Resonant Cavity Dielectric Spectroscopic Studies of Cellulosic Paper Aging

Cited by 6 publications

References 33 publications

Rapid detection of Escherichia coli using bacteriophage-induced lysis and image analysis

Rapid detection of Escherichia coli using bacteriophage-induced lysis and image analysis

Broadband Microwave Signal Dissipation in Nanostructured Copper Oxide at Air‐film Interface**

Studi Pengukuran Konstanta Dielektrik Kain Rajut Pakan Poliester Dan Katun Menggunakan Metode Kapasitansi Perangkat Kapasitor Plat Sejajar

Contact Info

Product

Resources

About