منابع مشابه
New records of heterocystous Cyanophyta from paddy fields of Iran
Four paddy fields in Guilan province in the north of Iran seasonally were sampled from April 2008 to January 2009. Twenty-two morphospecies belonging to three families of the heterocystous blue-green algae were identified. Fourteen species and one variety of these taxa are new record for Iran. Among the families Nostocaceae with six genera and 16 species showed the highest species richness.
متن کاملNew language found
As human languages are increasingly dying out, the discovery of a new one is striking. Nigel Williams reports. The UN's atlas of endangered languages lists around 230 that have become extinct during the past 60 years. And it is now widely agreed that around 3,000 languages worldwide are endangered and 200 are critically endangered with fewer than 10 speakers. Even in Europe, Karaim, in western ...
متن کاملNew PfATP6 mutations found in Plasmodium falciparum isolates from Vietnam.
Artemisinin and its derivatives have been used against malaria in Vietnam since 1991 (4). An increase in clinical artemisinin resistance would be disastrous for malaria treatment. All possible indicators of this potential resistance must be monitored. The sarco/endoplasmic reticulum Ca -ATPase ortholog of Plasmodium falciparum (PfATP6) has been suggested to be the target of artemisinins (3). Co...
متن کاملNew morphospecies of Phormidium and Microcoleus (Cyanophyta) in paddy-fields of Iran
Cyanophyta of some paddy-fields of Golestan province (North of Iran, near the Caspian Sea) have been studied during 2006–07. Phormidium subinerusatum, P. tenue, P. jadinianum, P. purpurascens, P. lucidum, P. fragile, Microcoleus palaodus, M. lacustris are new records for Golestan province and Iran. Results showed that P. subinerusatum, P. tenue were dominant in all stations. P. fragile, in spr...
متن کاملDNA enzymes: New-found chemical reactivity
DNA is generally considered to be chemically rather inert, but self-cleaving DNA molecules have recently been isolated from in vitro selection experiments; their properties advance the idea that, like RNA, DNA can serve as both a catalyst and an information storage medium.
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ژورنال
عنوان ژورنال: Kagaku To Seibutsu
سال: 1999
ISSN: 0453-073X,1883-6852
DOI: 10.1271/kagakutoseibutsu1962.37.809