Observations on copper(I) borohydride

The solution usually described as lambda; copper borohydriderho; contains chloride which continues to be associated with the copper, even through thermal decomposition or complexation.     

Observations on pollination inSarcostemma (Asclepiadaceae)

Field observations on pollination in New World species of the genusSarcostemma R. Br. sensuHolm are reported. Morphological and anatomical comparisons of pollinated flowers ofSarcostemma subg.Ceramanthus Kuntze (New World) andSarcostemma subg.Sarcostemma (Old World) are presented.     

Observations on Compsopogon iyengarii Krishnamurthy (Rhodophyceae)

The structure and reproduction of Compsopogon iyengarii Krishnamurthy collected from the river Yamuna at Allahabad have been studied both in nature and cultures. Certain branches produced by proliferating cortical cells may bear monoaplanospore like structures. Monoaplanospores and microaplanospores may germinate in situ under cultural conditions. Stages in development and germination of microaplanospores have been investigated.     

Pollen Morphology of Microula Benth. and Allied Genera (Boraginaceae)

Pollen grains of 16 species of Microula Benth. and six species of three related genera were examined under LM and SEM, and four of them also under TEM. Pollen grains of Microula and three related genera are dumb-bell-shaped, 3-colporate apertures alternate with three pseudocolpi. Pollen grains are very small,ranging from 12.18 x 7.13 μm to 6.36 x 3.66μm. In general, colpi with os are wider and shorter, rhomboid, but sometimes they are equal to pseudocolpi in length. Colpus margins are regularly or irregularly tooth-like. The surface of colpi is psilate or processed. Ora are circular or lalongated in outline, protruded or not; surface of os membrane is smooth or scabrid. The exine is usually indistinctly layered under LM. The exine surface is psilate, and more or less perforate. TEM examination shows that the pollen wall is differentiated into exine and intine: the exine includes ectexine and endexine, while the ectexine consists of tectum, columellae and foot-layer. However, there are differences in constriction of equatorial area, apertural characters, ornamentation and exinous ultrastructure between these genera. Pollen morphology indicates that the genus Microula Benth. is primitive, directly related to the genus Actinocarya Benth .; the genus Asperugo L. Is more advanced. The genus Eritrichium Schrad. which has two ora or one os and is anisopolar, represents the most advanced group among them. Noteworthily, the diorate phenomenon is found for the first time not onlyin the genus but in the family Boraginaceae.     

Observations on Neotropical Rainpools (Bolivia) with emphasis on Chironomidae (Diptera)

Nine rainpools in the savanna of northern Bolivia were examined using a random, semi‐quantitative sampling method. Both the macrophyte and insect assemblages showed that the longevity of a pool tended to be the dominant influence on the colonizing biota in the Tropics. Twenty‐four families of insects were recorded, including seven Heteroptera, five Odonata and five Diptera. The highly ephemeral (A‐)pools, which were dominated by beetles, differed from longer‐lived waters (B‐ and C‐pools). The composition of the insect assemblages in the B‐ and C‐pools formed a continuum, and the Chironomidae became more numerous and diverse with increasing water body longevity and habitat complexity. Out of the 20 recorded chironomid genera, three uncommon larval types are presented (Chironomini Gen X, "Tanytarsus”; (b), "Tanytarsus”; (dark L.o.). The study area is among the least researched in Bolivia, so many insects, and the chironomids in particular, are suspected as being newly discovered species.     

Molecular Constructions (Superstructures) with Adjustable Properties Based on Double-Stranded Nucleic Acids

We describe formation of a molecular construction that consists of double-stranded molecules of nucleic acids (or synthetic polynucleotides) located at a distance of 30–50 Å in the spatial structure of particles of their cholesteric liquid-crystalline dispersion and crosslinked by polymeric chelate bridges. The resulting superstructure, which possesses peculiar physicochemical properties, can be used as an integral biosensor whose properties depend on temperature, the presence of chemical or biologically active compounds of different nature, etc.     

Observations on Australian Glaucidae (Mollusca:Opisthobranchia)

Glaucilla Bergh, 1868 is positively recorded for the first time from eastern Australia, together with Glaucur Forster, 1777. The former is allocated to G. mrginuta Bergh, 1868 and the latter to G. atlanticuc Forster, 1777. Glaucilla has multiseriate ceratal clusters (uniseriate in Glaucus) , an unarmed penis (armed with a chitinous spine in Glaucas ) and several anatomical peculiarities. Glaucid nudibranchs feed upon species of Velella, Physalia and Porpita ; nematocysts of Physalia are subsequently employed for defence. Both Glaucus and Glaucilla are potentially harmful to man.     

串果藤属(Sinofranchetia)叶的个体发育研究

对串果藤属(Sinofranchetia)叶的个体发育过程进行了观察,结果表明,其叶原基在发生时为不分裂的,其后叶原基两侧产生两个突起,形成两个侧生小叶原基,而中央部分形成中央小叶的原基。同时对串果藤属植物叶原基发生的类型等问题进行了讨论。     

Observations on the Japanese Endemic Pseudopyxis (Rubiaceae-Paederieae)

Abstract Detailed information on the character states of Pseudopyxis depressa and P. heterophiylla , the only two representatives of the genus, are given. Particularly remarkable are the occurrence of both homo- ( P. heterophiylla ) and hetero(di)styly ( P. depressa ) and associated palynological differences, and the unusual fruits and diaspores, whose development is documented. Relationships between the two species are also discussed, and a section on the taxonomic position and history of the genus is included.     

Observations on the hypophysation of murrels (Ophicephalidae)

The four common Indian species of murrels, viz., Ophicephalus striatus (Bloch), Ophicephalus marulius (Hamilton), Ophicephalus gachua (Hamilton) and Ophicephalus punctatus (Bloch) were hypophysed, the former three for the first time.The characters by which sexes in murrels can be distinguished, basis of selection of breeders, hormone doses administered and response, percentage of fertilization of eggs, techniques adopted for hatching of eggs and rearing of larvae and the total developing eggs and spawn produced are reported and discussed.