Table 2 Values of pellet thickness (mm), peak height at 1385 cm−1(a.u.), peak height at 1385 cm−1 normalized by pellet thickness (a.u./mm), nitrate amount determined through a calibration plot (mg) and nitrate amount (mg) contained in 1 g of NYT powder obtained from plain NYT samples (a); 1 g of NYT powder obtained from NYT samples treated under controlled conditions with Halomonas campaniensis for 3 h (b); 1 g of NYT powder obtained from NYT samples treated with Halomonas campaniensis outdoors for 3 h (c).

From: Bio-cleaning of nitrate salt efflorescence on stone samples using extremophilic bacteria

Pellet thickness (mm)

Peak height at 1385 cm−1(a.u.)

Peak height at 1385 cm−1normalized by pellet thickness (a.u./mm)

Nitrate amount determined through calibration plot (mg)

Nitrate amount (mg) contained in 1 g of NYT powder

(a) Values referred to 1 g of NYT powder achieved for plain NYT samples

1.140

1.155

1.012

1.198

799

1.140

1.150

1.009

1.193

795

1.170

1.306

1.116

1.319

880

1.140

1.137

0.997

1.179

786

1.440

1.262

0.874

1.033

861

1.140

1.153

1.011

1.195

797

(b) Values referred to 1 g of NYT powder achieved for NYT samples treated under controlled conditions with Halomonas campaniensis for 3 h

1.100

0.167

0.152

0.179

179

1.141

0.261

0.229

0.271

180

1.160

0.348

0.300

0.355

237

1.130

0.189

0.163

0.193

193

1.141

0.261

0.229

0.271

180

1.160

0.348

0.300

0.355

179

(c) Values referred to 1 g of NYT powder achieved for NYT samples treated with Halomonas campaniensis outdoor for 3 h

1.184

0.985

0.832

0.980

490

1.240

0.473

0.301

0.356

223

1.153

0.680

0.589

0.697

410

1.229

0.980

0.798

0.943

428

1.227

0.285

0.232

0.274

196

1.150

0.673

0.585

0.692

461

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