A rhodamine based chemosensor for solvent dependent chromogenic sensing of cobalt (II) and copper (II) ions with good selectivity and sensitivity: Synthesis, Filter paper test strip, DFT calculations and Cytotoxicity

2021 ◽  
pp. 120099
Author(s):  
Wei Chuen Chan ◽  
Hazwani Mat Saad ◽  
Kae Shin Sim ◽  
Vannajan Sanghiran Lee ◽  
Chee Wei Ang ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Filter Paper ◽  
Test Strip ◽  
Paper Test ◽  
Synthesis Filter

Multiplexed paper test strip for quantitative bacterial detection

2012 ◽  
Vol 403 (6) ◽  
pp. 1567-1576 ◽  
Author(s):  
S. M. Zakir Hossain ◽  
Cory Ozimok ◽  
Clémence Sicard ◽  
Sergio D. Aguirre ◽  
M. Monsur Ali ◽  
...  
Keyword(s):  
Test Strip ◽  
Paper Test ◽  
Bacterial Detection

Determination of Cr(VI) concentration in diluted samples based on the paper test strip method

2009 ◽  
Vol 60 (12) ◽  
pp. 3083-3089 ◽  
Author(s):  
F. Kong ◽  
Y. Ni
Keyword(s):  
High Selectivity ◽  
Reference Method ◽  
Test Strip ◽  
Aliquat 336 ◽  
Color Intensity ◽  
Paper Test ◽  
Detection Range ◽  
Concentration Determination ◽  
Strip Method

At present, there are many methods for Cr(VI) concentration determination in diluted samples, however, these methods have their own inherent drawbacks, such as long response time, complicated pretreatment, expensive equipment etc. In this paper, a paper-based test strip method specific for determination of diluted Cr(VI) samples was developed. In this method, Aliquat 336, as an anion exchanger was loaded into filter paper to form a test strip. This test strip was used to pre-concentrate Cr(VI) when contacting with the diluted Cr(VI)-containing solution. The Cr(VI)-containing test strip was then immersed into a diphenylcarbazide (DPC) solution (a color forming solution), and the color intensity was correlated to the Cr(VI) concentration. The detection range of the present method was found to be 0.02–1.50 mg/L. The results also showed that the method gave a high selectivity for Cr(VI) in the diluted samples to be tested. The method was applied to synthesized samples and the results, which were compared to those from a reference method, showed that the developed method is an effective, reliable way for Cr(VI) determination in diluted samples.

scholarly journals Inter-test reliability of the anti-RESA indices based on ELISA tests using eluates from whole blood spots dried on filter paper

2002 ◽  
Vol 129 (1) ◽  
pp. 139-145 ◽  
Author(s):  
E. C. DUARTE ◽  
T. W. GYORKOS ◽  
L. PANG ◽  
S. ÁVILA ◽  
C. J. F. FONTES
Keyword(s):  
Filter Paper ◽  
Whole Blood ◽  
Test Reliability ◽  
Test Results ◽  
Serum Samples ◽  
Paper Test ◽  
Elisa Testing ◽  
Erythrocyte Surface ◽  
Sample Test ◽  
Study Population

The ring-infected erythrocyte surface antigen (RESA), is one of the falciparum malaria vaccine candidates rarely studied in Brazil. Fieldwork logistics to conduct serology studies is simplified when eluates from whole blood dried on filter paper can be used. Therefore, this study aimed to assess the inter-test reliability for the anti-RESA ELISA-based indices using eluates from filter paper and from serum samples. The study population consisted of 210 individuals (Brazil) from whom matched samples were collected. Anti-RESA ELISA-based index means (±S.D.) were 15.29% (±28.13%) for filter paper and 11.79% (±23.67%) for serum samples. The intra-class correlation coefficient was estimated to be 82.38%, indicating high test reliability. However, there was a significant tendency for filter paper test results to have higher values than serum sample test results (P<0.001). Explanations for this finding may be the presence of haemoglobin in the eluates from filter paper, which may interfere with ELISA testing.

Effect of Compaction Degree on Soil-Water Characteristic Curve of Chongming Clay

2011 ◽  
Vol 90-93 ◽  
pp. 701-706
Author(s):  
Jing Song Qian ◽  
Hang Lu
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Filter Paper ◽  
Characteristic Curve ◽  
Liquid Limit ◽  
Degree Of Saturation ◽  
Paper Test ◽  
Soil Water Characteristic Curve ◽  
Gravimetric Water Content ◽  
Compaction Degree

The soil-water characteristic defines the relationship between the soil suction and gravimetric water content, w, or the volumetric water content, θ, or the degree of saturation, S. It is a convenient method to predict water content in the subgrade using the curve. But in the field tests of subgrades, the compaction degree of soil became lower with time than initially designed. With the purpose of finding out effect of compaction degree on soil-water characteristic curve, a study to the SWCC (soil-water characteristic curve) of Chongming low liquid limit clay using filter paper method was carried out and is presented in this paper. Specimens of different water contents were prepared by absorbing different amount of water, in order to better simulate the process of wetting of subgrade soil. After the filter paper test, the soil-water characteristic curve was fitted with two models, and then the effect of compaction degree on the curve was analyzed. The figures show that the compaction degree of the specimen will decrease with higher water content, and from the gravimetric water content-matric suction curve, it is found that compaction degree has an effect on air-entry value and water storage capacity.

scholarly journals Screening patients with hypertrophic cardiomyopathy for Fabry disease using a filter-paper test: the FOCUS study

Heart ◽  
2010 ◽  
Vol 97 (2) ◽  
pp. 131-136 ◽  
Author(s):  
A. A. Hagege ◽  
E. Caudron ◽  
T. Damy ◽  
R. Roudaut ◽  
A. Millaire ◽  
...  
Keyword(s):  
Hypertrophic Cardiomyopathy ◽  
Fabry Disease ◽  
Filter Paper ◽  
Paper Test

scholarly journals Pengaruh Penambahan PVP Pada Indikator Alami Curcuma Longa L. Untuk Mendeteksi Boraks Pada Bakso

2019 ◽  
Vol 1 (1) ◽  
pp. 21-25
Author(s):  
Neneng Bisyaroh
Keyword(s):  
Boric Acid ◽  
Filter Paper ◽  
Curcuma Longa ◽  
Test Strip ◽  
Complex Compounds ◽  
Polyvinyl Pyrrolidone ◽  
Boron Compounds ◽  
Turmeric Extract ◽  
Color Complex ◽  
Strip Test

Borax is widely used in making various foods such as meatballs, wet noodles, pisang molen, lemper, siomay, lontong, ketupat , and pangsit. Curcumin contained in turmeric can detect the presence of borax content in meatballs by breaking down the borax bonds to boric acid and binding them to rosa color complex compounds called boron compounds cyano curcumin complex. Making a test strip by immobilizing filter paper on the turmeric indicator which has been added polyvinyl pyrrolidone 1% and applied to the meatballs so that it can determine whether there is a borax content in the meatballs. The response time of the test strip is 30 seconds. The test strips of turmeric extract without the addition of polyvinyl pyrrolidone leave the remaining turmeric color in the meatballs while the test strip results of turmeric extract with the addition of polyvinyl pyrrolidone 1% do not leave the remaining turmeric color in the meatballs. The three meatball samples taken in the Pondok Sukorejo area did not contain borax.   Keywords: Borax Content In Meatballs, Strip Test, Turmeric Indicator. ABSTRAK   Boraks banyak digunakan dalam pembuatan berbagai makanan seperti bakso, mie basah, pisang molen, lemper, siomay, lontong, ketupat, dan pangsit. Kurkumin yang dikandung oleh kunyit dapat mendeteksi adanya kandungan boraks pada bakso dengan menguraikan ikatan–ikatan boraks menjadi asam borat dan mengikatnya menjadi senyawa kompleks warna rosa yang disebut dengan senyawa boron cyano kurkumin kompleks. Pembuatan strip test dengan cara mengimobilisasikan kertas saring pada indikator kunyit yang telah ditambah polivinil pirolidon 1% dan diaplikasikan pada bakso sehingga dapat mengetahui ada tidaknya kandungan boraks dalam bakso tersebut. Waktu respon dari strip test yaitu 30 detik. Strip test dari ekstrak kunyit tanpa penambahan polivinil pirolidon meninggalkan sisa warna kunyit pada bakso sedangkan hasil strip test dari ekstrak kunyit dengan penambahan polivinil pirolidon 1% tidak meninggalkan sisa warna kunyit pada bakso. Ketiga sampel bakso yang diambil di wilayah Pondok Sukorejo tidak mengandung boraks.   Kata kunci : Kandungan Boraks dalam Bakso, Strip Test, Indikator Kunyit

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