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排序方式: 共有284条查询结果,搜索用时 15 毫秒
281.
Vytautas Petkevičius Justas Vaitekūnas Renata Gasparavičiūtė Daiva Tauraitė Rolandas Meškys 《Microbial biotechnology》2021,14(4):1771-1783
Here, we present an improved whole-cell biocatalysis system for the synthesis of heteroaromatic N-oxides based on the production of a soluble di-iron monooxygenase PmlABCDEF in Pseudomonas sp. MIL9 and Pseudomonas putida KT2440. The presented biocatalysis system performs under environmentally benign conditions, features a straightforward and inexpensive procedure and possesses a high substrate conversion and product yield. The capacity of gram-scale production was reached in the simple shake-flask cultivation. The template substrates (pyridine, pyrazine, 2-aminopyrimidine) have been converted into pyridine-1-oxide, pyrazine-1-oxide and 2-aminopyrimidine-1-oxide in product titres of 18.0, 19.1 and 18.3 g l-1, respectively. To our knowledge, this is the highest reported productivity of aromatic N-oxides using biocatalysis methods. Moreover, comparing to the chemical method of aromatic N-oxides synthesis based on meta-chloroperoxybenzoic acid, the developed approach is applicable for a regioselective oxidation that is an additional advantageous option in the preparation of the anticipated N-oxides. 相似文献
282.
Pliūra Alfas Jankauskienė Jurga Bajerkevičienė Gintarė Lygis Vaidotas Suchockas Vytautas Labokas Juozas Verbylaitė Rita 《Journal of plant research》2019,132(6):789-811
Journal of Plant Research - The study aimed to assess response of juvenile progeny of seven forest tree species, Pinus sylvestris, Picea abies, Betula pendula, Alnus glutinosa, Populus tremula,... 相似文献
283.
Pavel Zehtindjiev Asta Križanauskienė Sergio Scebba Dimitar Dimitrov Gediminas Valkiūnas Arne Hegemann B. Irene Tieleman Staffan Bensch 《European Journal of Wildlife Research》2012,58(1):335-344
Changes in agricultural management have been identified as the most probable cause for the decline of Skylark (Alauda arvensis) populations in Europe. However, parasitic infections have not been considered as a possible factor influencing this process.
Four hundred and thirty-four Skylarks from the Southern Italy and the Netherlands were screened for haemosporidian parasites
(Haemosporida) using the microscopy and polymerase chain reaction (PCR)-based methods. The overall prevalence of infection
was 19.5%; it was 41.8% in Italian birds and 8.3% in Dutch birds. The prevalence of Plasmodium spp. was 34.1% and 6.5% in Skylarks from Italy and Netherlands, respectively. Approximately 15% of all recorded haemosporidian
infections were simultaneous infections both in Italian and Dutch populations. Six different mitochondrial cytochrome b (cyt b) lineages of Plasmodium spp. and three lineages of Haemoproteus tartakovskyi were found. The lineage SGS1 of Plasmodium relictum was the most prevalent at both study sites; it was recorded in 24.7% of birds in Italy and 5.5% in the Netherlands. The lineages
SYAT05 of Plasmodium vaughani and GRW11 of P. relictum were also identified with a prevalence of <2% at both study sites. Two Plasmodium spp. lineages (SW2 and DELURB4) and three H. tartakovskyi lineages have been found only in Skylarks from Italy. Mitochondrial cyt b lineages SYAT05 are suggested for molecular identification of P. vaughani, a cosmopolitan malaria parasite of birds. This study reports the greatest overall prevalence of malaria infection in Skylarks
during the last 100 years and shows that both Plasmodium and Haemoproteus spp. haemosporidian infections are expanding in Skylarks so it might contribute to a decrease of these bird populations in
Europe. 相似文献
284.
Tadashi Nakai Takafumi Ohta Yūko Fujita Kaoru Horiuchi 《Bioscience, biotechnology, and biochemistry》2013,77(12):2623-2624
A determination was made of fatty acid compositions in twelve commercial red wines made from grapes differing in kind and vintage. Twelve fatty acids were identified, palmitic, myristic, and lauric acids being found predominant. Total acyls (32~81 nmol/100 ml) differed considerably. Changes in fatty acid constituents in must from grape berries and wines according to the process of manufacture were also examined. 相似文献