. 2019 Feb 21;9:2440. doi: 10.1038/s41598-019-38977-x

Table 3.

Effect of dihydrohaemanthamine and derivatives of haemanthamine and dihydrohaemanthamine, added at 0.5 and 1 g/L, on pH, ammonia (mM) and total gas and methane (mL) produced after 24 h of incubation.

	pH			Ammonia (mM)			Total gas (mL)			Methane (mL)
	Dose (g/L)			Dose (g/L)			Dose (g/L)			Dose (g/L)
	0	0.5	1	0	0.5	1	0	0.5	1	0	0.5	1
Haemanthamine derivatives
2	6.19^a	6.23^ab	6.36^b	7.12^a	5.16^b	6.06^ab	25.1^a	21.36^ab	18.04^b	2.99^a	0.005^b	0.003^b
3	6.19^a	6.29^ab	6.38^b	7.12^a	6.51^a	6.34^a	25.1^a	22.09^ab	19.77^b	2.99^a	0.003^b	0.003^b
4	6.19^a	6.17^a	6.37^b	7.12^a	5.24^b	6.17^ab	25.1^a	23.56^ab	17.77^b	2.99^a	1.0^b	0.48^b
5	6.19^a	6.29^a	6.27^a	7.12^a	7.04^a	6.07^a	25.1^a	22.10^ab	21.59^a	2.99^a	0.003^b	0.003^b
Dihydrohaemanthamine derivatives
6	6.19^a	6.25^ab	6.36^b	7.12^a	5.38^b	5.85^ab	25.1^a	21.95^ab	18.96^b	2.99^a	1.94^a	1.62^a
7	6.19^a	6.31^ab	6.34^b	7.12^a	5.72^b	6.12^ab	25.1^a	21.61^ab	19.61^b	2.99^a	0.003^b	0.003^b
8	6.19^a	6.33^b	6.37^b	7.12^a	6.65^a	6.76^a	25.1^a	21.04^ab	19.80^b	2.99^a	0.003^b	0.003^b
9	6.19^a	6.31^ab	6.33^b	7.12^a	6.94^a	6.71^a	25.1^a	20.29^ab	17.75^b	2.99^a	0.003^b	0.003^b
10	6.19^a	6.26^a	6.25^a	7.12^a	6.86^a	6.08^a	25.1^a	19.35^b	18.38^b	2.99^a	0.003^b	0.003^b
		SED	P		SED	P		SED	P		SED	P
Treatment		0.019	0.020		0.190	<0.001		0.730	0.176		0.251	<0.001
Dose		0.011	<0.001		0.110	<0.001		0.421	<0.001		0.145	<0.001
Treatment x Dose		0.033	<0.001		0.329	<0.001		1.26	0.330		0.434	0.154

SED: Standard error of the difference. ^a,bMeans with different superscript differ significantly by dose within treatment.