(n.) A dyestuff extracted from certain lichens (Roccella tinctoria, Lecanora tartarea, etc.), as a blue amorphous mass which consists of a compound of the alkaline carbonates with certain coloring matters related to orcin and orcein.
Example Sentences:
(1) The Tea Party movement has turned climate denial into a litmus test of conservative credentials – and that has made climate change one of the most sharp divisions between Obama and Romney.
(2) Despite this, the ban has remained a moral litmus test for Democratic politicians.
(3) Jakarta governor election a 'litmus test' of Indonesian Islam Read more Stakes in the vote have been raised by allegations that Ahok – the city’s first non-Muslim governor for half a century and its first ethnic Chinese leader – insulted the Koran.
(4) Today's events were a litmus test for the strength of a new generation of anti-government activists, who have rejected the moribund landscape of formal politics and begun organising online.
(5) Richard Dicker, head of international justice at Human Rights Watch in New York, said Libya's actions over the two suspects would be the litmus test of its commitment to democracy and the rule of law.
(6) "How we respond to dementia is the litmus test of whether we can face up to the challenge of an ageing population, and do so in a way which allows compassion and dignity.
(7) In evaluating the in vitro proteolytic potential of M bovis isolates, 83 hemolytic and 5 nonhemolytic isolates peptonized litmus milk; 176 nonhemolytic isolates did not peptonize litmus milk.
(8) Whatever the merits of the decision, the coming days with coverage of Thatcher's funeral to negotiate will be a litmus test for Hall, a former head of BBC News, who arrived back at the corporation after 12 years as chief executive of the Royal Opera House on 2 April.
(9) They grow on buffered charcoal-yeast extract agar and nutrient broth, but rarely on MacConkey agar, at 25 and 30 degrees C. They are urease positive; but they are negative in reactions for hemolysis, indole production, H2S production (triple sugar iron agar), gelatin hydrolysis, esculin hydrolysis, and peptonization of litmus milk.
(10) Many outside the region will be watching closely – with Andalusians representing 20% of voters in Spain, the election is widely seen as a litmus test for municipal, regional and general elections due to be held across the country later this year.
(11) Growth is good on 5% bile salts-agar and in broth at 10 C, and in broth adjusted to pH 9.6 or containing 6.5% NaCl, but many strains fail to grow at 45 C. Litmus is reduced rapidly prior to formation of an acid curd.
(12) My litmus test was would they behave this way with a local woman and I knew the answer was no, they knew I lived alone, so I didn’t let them in.” Harris says she raised the issue with her GIZ manager but claims he dismissed her concerns, she said.
(13) Still, it’s an impressive coup for the league to ensure their part of the deal and the stability it brings – whatever the multi-platform future, the large-scale TV deal is still one of the key unsentimental litmus tests for how a league is translating, and while the network executives, particularly ESPN’s John Skipper, acknowledged that “it’s a future buy.
(14) The elongation test to distinguish the bacillary M vovis from the coccal N ovis, the nitrate reduction and the litmus milk tests were found to be the most reliable.
(15) Strains were identified to the species level by hydrolysis of esculin, reactions in litmus milk, slime production on 5% sucrose agar, acidification of maltose, melibiose, and raffinose broths, deamination of arginine, and growth at 42 degrees C and in 6.5% NaCl broth.
(16) There is no suggestion of the litmus test of localism, an end to rate capping.
(17) A high proportion of M. bovis from IBK lesions were simultaneously active in haemolysis, agar corrosion, gelatin liquefaction and litmus milk peptonisation.
(18) Perfringens was based on atmospheric requirements for growth, colonial morphology, and stormy fermentation in litmus milk.
(19) Tony Abbott’s “sex appeal” candidate, Fiona Scott, is poised for a landslide victory in the litmus-test western Sydney seat of Lindsay with a stunning 60% of the primary vote, according to a Guardian Lonergan poll.
(20) But, describing Brexit negotiations as a “litmus test for responsible financial globalisation”, Carney suggested such gains were now at risk.
Orcein
Definition:
(n.) A reddish brown amorphous dyestuff, /, obtained from orcin, and forming the essential coloring matter of cudbear and archil. It is closely related to litmus.
Example Sentences:
(1) The orcein staining method seems to be a reliable addition to differentiating histologically between PBC and CAH.
(2) Microscopic examinations of eggs stained with aceto-orcein or the DNA fluorochrome bisbenzimide and direct observations on isolated sperm aster complexes show that halothane induces polyspermy (multiple sperm entry) when present at fertilization.
(3) 5 in whom a clinical and histological diagnosis of Indian Childhood Cirrhosis was made had massive orcein-staining deposits in liver cells.
(4) Determination of fungal elastase, however, requires partial purification of culture extracts and the orcein elastin or gravimetric method.
(6) The orcein positive substance localized in the cytoplasm of hepatocytes, less often it was also seen in a few Kupffer cells.
(7) Aceto-orcein and Giemsa when used cold were found to produce relatively artefact-free preparations.
(8) Orcein-positive material in Kupffer cells was not associated with HBsAg as evaluated by the immune peroxidase method.
(9) This enzyme was inactivated by diisopropyl fluorophosphate (DFP), phenylmethyl sulphonylfluoride (PMSF), soybean trypsin inhibitor (SBTI), or elastatinal, suggesting a seryl protease resembling elastase, but it failed to digest elastin-orcein.
(10) This group of patients may therefore have both biliary disease are hepatocellular damage, and can be separated from CAH by the orcein method.
(11) These HBcAg inclusions stain greyish pink with chromotrope aniline blue and are negative for orcein, the periodic acid-Schiff reaction, and the Feulgen reaction for DNA.
(12) Liver specimens from 103 patients with various hepatic diseases and from 297 consecutive liver biopsies examined routinely were stained with orcein after oxidation of the tissue sections with potassium permanganate.
(13) One conspicuous feature was the substantially reduced quantity of positive elements in comparison with the results of staining with aldehydefuchsine and orceine.
(14) Cytofluorometric measurements of orcein-stained chromatin revealed an emission peak at 585 nm with a shoulder at 620 nm.
(15) Orcein-positive material was very frequently found in protracted viral hepatitis and in chronic active hepatitis, as well as in other liver diseases with or without cholestasis; it was absent in liver cirrhosis.
(16) The pattern of copper distribution in human newborn liver was investigated by histochemical methods (rhodamine, orcein and rubeanic acid) and by atomic absorption spectroscopy.
(17) OPHM in HCC was stained with orcein when the tissue sections were preoxidized.
(18) It did not correspond to the pattern and texture of material stained with PAS, Sudan Black or acid orcein.
(19) root tips) and involves the treatment of root tips with 1-2% solution of trypsin either in buffer or in 0.5 N HCl for 5-10 minutes at 37 C or for 30-60 minutes near 0 C followed by staining with 1.5% acetic orcein: 1 N HCl (19:1).
(20) All 17 biopsy specimens from patients with Wilson's disease had high liver copper concentrations, but only nine had positive staining for copper, and six were orcein positive.