Distribution of injected Vibrio anguillarum in body of Penaeus monodon was studied with immunohistochemical method. Bacteria could be detected throughout the experiment in some individuals; however in lymphoid tissue,...Distribution of injected Vibrio anguillarum in body of Penaeus monodon was studied with immunohistochemical method. Bacteria could be detected throughout the experiment in some individuals; however in lymphoid tissue, gill, heart and haemolymph of all vibrio injected shrimp, the bacteria could be observed only 5 min after injection. The bacteria density in haemolymph, haemolymph of the hepatopancreas and gills decreased with time. In the lymphoid organ and heart, the bacteria density was the highest 48 h after injection, then decreased. Nodules could be formed in the heart, lymphoid organ and injection site.展开更多
The extraction of penicillin G by ionic liquid[Bmim]PF_6 has exhibited promising prospect.The stability of penicillin G is crucial for developing a green ionic liquid-based extraction technology.In this work,the stabi...The extraction of penicillin G by ionic liquid[Bmim]PF_6 has exhibited promising prospect.The stability of penicillin G is crucial for developing a green ionic liquid-based extraction technology.In this work,the stability of penicillin G in[Bmim]PF_6 was systematically investigated.The results showed the stability of penicillin G was significantly influenced by pH and temperature.It tended to be more stable when pH value increased from 1.5 to 4.0 and the temperature gradually decreased.The half-life(t_(1/2))of penicillin G in[Bmim]PF_6 was 17.7 h in the optimal technological condition(pH 2.0 and 10°C),which is enough for the requirement of extraction technology.The reaction of penicillin G in[Bmim]PF_6 followed the first order kinetics in the pH range 2.0–4.0.Three isomers of penicillin G were found through rearrangement at pH 2.0,and their structures were not affected by temperature.展开更多
We examined the stability of amoxicillin trihydrate from the preparation Augmentin in compounded forms of drugs such as vaginal suppositories and ointments. The quantity of the antibiotic in the preparations studied w...We examined the stability of amoxicillin trihydrate from the preparation Augmentin in compounded forms of drugs such as vaginal suppositories and ointments. The quantity of the antibiotic in the preparations studied was determined directly after they had been made and after a lapse of 7 and 14 days. We also carried out comparative examinations of the stability of sodium amoxicillin （Tarommentin） and sodium ampicillin （Ampicillin） in ointments with an addition of a boric acid solution. The examinations confirmed the stability of amoxicillin trihydrate in suppositories and in anhydrous and hydrated ointments. The content of this antibiotic in ointmems with an addition of a boric acid solution decreases slightly. Comparative studies of the stability of sodium amoxicillin and sodium amoxicillin revealed a markedly lower stability of the two antibiotics in comparison to the stability of amoxicillin trihydrate.展开更多
文摘Distribution of injected Vibrio anguillarum in body of Penaeus monodon was studied with immunohistochemical method. Bacteria could be detected throughout the experiment in some individuals; however in lymphoid tissue, gill, heart and haemolymph of all vibrio injected shrimp, the bacteria could be observed only 5 min after injection. The bacteria density in haemolymph, haemolymph of the hepatopancreas and gills decreased with time. In the lymphoid organ and heart, the bacteria density was the highest 48 h after injection, then decreased. Nodules could be formed in the heart, lymphoid organ and injection site.
基金Supported by the National Natural Science Foundation of China(21676272)Major Science and Technology Project of Water Pollution Control and Management in China(2017ZX07402003)the Key Research Program of the Chinese Academy of Sciences(ZDRW-ZS-2016-5-3)
文摘The extraction of penicillin G by ionic liquid[Bmim]PF_6 has exhibited promising prospect.The stability of penicillin G is crucial for developing a green ionic liquid-based extraction technology.In this work,the stability of penicillin G in[Bmim]PF_6 was systematically investigated.The results showed the stability of penicillin G was significantly influenced by pH and temperature.It tended to be more stable when pH value increased from 1.5 to 4.0 and the temperature gradually decreased.The half-life(t_(1/2))of penicillin G in[Bmim]PF_6 was 17.7 h in the optimal technological condition(pH 2.0 and 10°C),which is enough for the requirement of extraction technology.The reaction of penicillin G in[Bmim]PF_6 followed the first order kinetics in the pH range 2.0–4.0.Three isomers of penicillin G were found through rearrangement at pH 2.0,and their structures were not affected by temperature.
文摘We examined the stability of amoxicillin trihydrate from the preparation Augmentin in compounded forms of drugs such as vaginal suppositories and ointments. The quantity of the antibiotic in the preparations studied was determined directly after they had been made and after a lapse of 7 and 14 days. We also carried out comparative examinations of the stability of sodium amoxicillin （Tarommentin） and sodium ampicillin （Ampicillin） in ointments with an addition of a boric acid solution. The examinations confirmed the stability of amoxicillin trihydrate in suppositories and in anhydrous and hydrated ointments. The content of this antibiotic in ointmems with an addition of a boric acid solution decreases slightly. Comparative studies of the stability of sodium amoxicillin and sodium amoxicillin revealed a markedly lower stability of the two antibiotics in comparison to the stability of amoxicillin trihydrate.
