A new subspecies of Papuina antiqua (Adams & Reeve, 1850) from Yapen Island, Papua, Indonesia

This paper describes a new subspecies of Papuina antiqua (Adams & Reeve, 1850) from forested hills east of Serui on the south coast of Yapen Island in Papua Province, Indonesia. The pink coloration of the early whorls and minor differences in sculpture separates it from Papuina antiqua and its other named subspecies and form.

What colour is penguin guano?

The identification and quantification of Antarctic Pygoscelis penguin colonies depends increasingly on recognition of the characteristic optical properties of guano deposits, but almost all knowledge of these properties until now has been compromised by resolution and atmospheric propagation effects. Here we present hyperspectral reflectance data in the range 350–2500 nm, collected in situ from fresh guano deposits in Pygoscelis penguin colonies on Signy Island, South Orkney Islands. The period of data collection included the transition from predominantly white guano to the pink coloration characteristic of a krill-rich diet. The main identifiable features in the spectra are a broad absorption feature centred around 550 nm, responsible for the pink coloration and identified with the pigment astaxanthin, as well as several water absorption features. Variations in these features are responsible for differentiation between spectra. From these results we propose two spectral indices suitable for use with satellite data, one of which responds to the presence of astaxanthin in the guano and the other to water. Our results do not allow us to differentiate between penguin species from their guano, but do suggest that the breeding phenology of Pygoscelis penguins could be determined from a time series of multispectral imagery.

Study on the Element Composition of Southern Celadon Porcelain and Coloring Mechanism

This paper mainly discusses the Si/Al molar ratio, RO/R2O molar ratio, Fe content, glazing and firing system on the thickness of Longquan Celadon pink coloring effects, and using a colorimeter, field emission scanning electron microscopy were used to analyze better experimental sample microstructure and color and so on. We explored the Longquan Celadon of pink coloration mechanism.

Dermoscopy of Cylindroma

Background. Dermoscopy provides additional criteria for the diagnosis of nonpigmented skin lesions.Case Report. An 80-year-old woman presented with an isolated, firm, dome-shaped, erythematous nodule with surface telangiectasia on her forehead. Dermoscopy showed areas of background pink coloration with arborizing telangiectasia, blue dots/globules, and ulceration. Histologic analysis revealed features of cylindroma.Conclusion. Our case suggests that cylindromas may be added to the list of adnexal tumors mimicking BCC.

The use of tristimulus colorimetry for the determination of hydrogen cyanide in air by a modified König method

A simple visual and tristimulus colorimetric method (threedimensional system CIE-L*a*b*) for the determination of trace amounts of hydrogen cyanide in air has been developed. The method is based on the suction of hydrogen cyanide through a chlorinating cartridge where cyanogen chloride is formed, which is further driven to an indicator disc made of a modified cotton fabric. This indicator disc is placed into an adapter. Prior to analysis, the disc is saturated with a chromogenic reagent, a solution of 5,5-dimethyl-1,3-cyclohexanedione (dimedone) and 4-benzylpyridine in ethanol. In the presence of hydrogen cyanide (cyanogen chloride), a pink coloration emerges on the indicator disc, the intensity of which is evaluated either visually or by use of a tristimulus colorimeter. The detection limit is 0.1 mg m-3. The method is mainly suitable for mobile field analyses. It was applied for the CHP-5 chemical agent detector introduced into the equipment of the Czech Army corps.

Erwinia rhapontici. [Descriptions of Fungi and Bacteria].

A description is provided for Erwinia rhapontici. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Rheum rhaponticum and seed of Triticum sp. DISEASE: Crown rot of rhubarb. Infection usually occurs at soil level or a little below, begninning as a brownish rot that gradually extends into the centre of the root. A cavity may be formed, and the flesh below the crown turns brown, then black. The plant is steadily weakened until finally the crown decays or breaks away, and small spindly leaves grow from lateral buds. Pink grain of wheat. The grain is coloured pink and has an internal cavity below the hilum. Germination of the seed is reduced and plants are retarded by about 3 weeks (Luisetti & Rapilly, 1967). GEOGRAPHICAL DISTRIBUTION: England, Wales and Poland are listed in CMI Map 145. To these should be added USA (Oklahoma) (19, 295) and possibly Norway (7, 700). On wheat, pink grain has been reported from England (55, 699), France (Luisetti & Rapilly, 1967), and possibly Australia where pink coloration of grain has been reported (33, 21). TRANSMISSION: In rhubarb the nematode Anguillulina dipsaci is known to assist the bacterium to enter the crowns (Metcalfe, 1940). It probably also transmits the organism. Wounding is needed for the bacteria to gain entry, and this undoubtedly occurs during the procedures connected with cultivation and vegetative propagation. Infected setts could transmit this disease into new areas.

The Boltz (Acetic-Anhydride) Test in Cerebro-Spinal Fluid

The acetic anhydride test was introduced in 1923 by Boltz, who regarded a positive result as diagnostic of syphilis of the central nervous system. The technique of the test is simplicity itself, and is as follows: Place 1 c.c. of spinal fluid in a small test-tube. Add 0.3 c.c. of acetic anhydride drop by drop; shake. Add 0.8 c.c. concentrated sulphuric acid drop by drop; shake. After five minutes examine the colour of the fluid against a white background. A lilac or blue-pink coloration is positive.