荞麦壳的研究进展

从荞麦壳中黄酮类化合物、半纤维素、棕色素、多糖等五方面介绍了荞麦壳的研究进展及其新用途。

“吃”进去清油污 “吐”出来做建材——俄将荞麦壳和稻壳变废为宝

堆积如山的荞麦壳和稻壳由于没有大用途,通常被白白地烧掉。如今,俄罗斯科学家利用一种特别工艺把它们变成了宝贝。经加工改造,荞麦壳和稻壳变成了优质吸附剂,能“吃掉”泄漏的石油,帮助人们清理水面,回收“吐油”后又可做成建筑材料。

Influences of Oyster Shell Soil Conditioner on Soil and Plant Rhizospheric Microorganisms

Oyster shell soil conditioner had significant influence on soil and rhizospheric microorganisms in their biomass,respiratory intensity and nutritional requirement. It could stimulate growth of soil and rhizospheric microorganisms, especially nitrogen-fixers, and intensify soil respiration in proportion to the dose and fertilizing time of the conditioner, leading to the increase in the number of nitrogen fixing bacteria and the decrease in the number of bacteria with special nutrition demands.

Bacteriological Analysis of the Digestive Tube of the Mud Snail (Bullacta exarata Philippi) and Its Rearing Shoal

The bacterial flora in the digestive tube of Bullacta exarata Philippi and its rearing shoal were investigated. A total of 157 strains of heterotrophic bacteria, isolated from crop, stomach intestine and other parts of the digestive tube, mainly belong to the genera Photobacterium, Bacillus, Pseudomonas Vibrio and some genera of the family Enterobacteriaceae. There are significantly more varieties of bacteria in crop than in stomach and intestine. A total of 173 strains of bacteria were isolated from the rearing shoal, belonging to 13 genera. The 5 predominant genera, such as Bacillus and Photobacterium, are the same as those in the digestive tube, but greatly differ in percentages. The number of heterotrophic bacteria and Vibrio in rearing shoal change in line with the alteration of the temperature, and are significantly affected by the use of pesticides.

Importance of kelp-derived organic carbon to the scallop Chlamys farreri in an integrated multi-trophic aquaculture system

Bivalves and seaweeds are important cleaners that are widely used in integrated multi-trophic aquaculture （IMTA） systems. A beneficial relationship between seaweed and bivalve in the seaweed- based IMTA system has been confirmed, but the trophic importance of seaweed-derived particulate organic materials to the co-cultured bivalve is still unclear. We evaluated the trophic importance of the kelp Saccharinajaponica to the co-cultured scallop Chlamysfarreri in a typical IMTA farm in Sungo Bay （Weihai, North China）. The dynamics of detritus carbon in the water were monitored during the culturing period. The proportion of kelp-derived organic matter in the diet of the co-cultured scallop was assessed via the stable carbon isotope method. Results showed that the detritus carbon in the water ranged from 75.52 to 265.19 ~tg/L, which was 25.6% to 73.8% of total particulate organic carbon （TPOC） during the study period. The amount of detritus carbon and its proportion in the TPOC changed throughout the culture cycle of the kelp. Stable carbon isotope analysis showed that the cultured scallop obtained 14.1% to 42.8% of its tissue carbon from the kelp, and that the percentages were closely correlated with the proportion of detritus carbon in the water （F=0.993, P=0.003）. Evaluation showed that for 17 000 tons （wet weight） of annual scallop production, the kelp contributed about 139.3 tons of carbon （535.8 tons of dry mass）. This confirms that cultured kelp plays a similar trophic role in IMTA systems as it does in a natural kelp bed. It is a major contributor to the detritus pool and supplies a vital food source to filter-feeding scallops in the IMTA system, especially during winter and early spring when phytoplankton are scarce.

Investigation and Study on the Alien Species in Aquaculture in the Lower Reaches of the Yangtze River

The lower reaches of the Yangze River is one of the central areas of freshwater shallow lakes in China and has the diverse climates with both warm temperate zone and sub-tropical zone,which makes it become one of the best areas for aquaculture,so nearly all of the aquaculture species from the world can live in the area.It is important for perfecting alien aquaculture species information data-base and environmental risk assessment system to investigate and study the aquaculture alien species in the lower reaches of the Yangze River.The results showed that the number of aquaculture alien species in the lower reaches of the Yangze River is 45 species,including 33 species of fishes,4 species of shellfish,7 species of crustaceans and 1 species of amphibian.Most of alien species are from America and the main transmitting way is intentional introducing.

港交所出手遏制卖壳活动

养壳方面,公司业务及资产不足维持上市地位及现金资产公司则稍为放宽.新规则将在10月1日生效,养壳新规则设12个月过渡期.养壳期内,自营证券投资不属养壳,是唯一的让步.现时港交所(00388.HK)上市申请,主板需要有三年业绩,创业板则需要两年业绩.有些公司没有三年业绩,所以会以借壳方式得到上市地位.最成功的借壳上市,就是嘉华建材卖壳予现时的银河娱乐(00027.HK).