BACKGROUND Bamboo is a highly abundant source of biomass which is underutilized despite having a chemical composition and fiber structure similar as wood. The main challenge for the industrial processing of bamboo is the high level of silica, which forms water-insoluble precipitates negetively affecting the process systems. A cost-competitive and eco-friendly scheme for the production of high-p...

Li4SiO4 has been widely studied as tritium breeder and high temperature CO2 capture material. Tritium breeding rate adsorption capacity are closely related to lithium content microstructure. Since sintering temperatures result in grain coarsening sublimation, it is a great challenge prepare ceramics with satisfactory mechanical strength at low temperature. In this work, mesoporous silica was us...

Solenopsis geminata group (Hymenoptera: Formicidae) encompasses ant species commonly called fire ants because of their painful sting. The many physiological effects of the venom are caused by 2-methyl-6-alkyl and/or alkenylpiperidine alkaloids. The variation in piperidine alkaloid structures has useful taxonomic characters. The most well studied Solenopsis species is Solenopsis invicta, which w...

A method based on silica gel chromatography and GC-MS/GC-FID analyses was developed for the quantitation of alkaloidal compounds in imported fire ants, Solenopsis richteri, S. invicta, and their hybrid found in the southern United States. The cis and trans alkaloids from fire ant body extracts were successfully separated by silica gel chromatography, identified by GCMS, and quantitated by GC-FI...

The acid-catalyzed synthesis of highly ordered mesostructured materials has led to a variety of twoand three-dimensional periodic symmetries, and has proven to be an effective route for the generation of fibers, spheres, thin films, and other monolithic forms of mesoporous materials. Zhao et al. recently used non-ionic poly(alkylene oxide) block copolymers, under acidic conditions, to prepare w...

We report Si-isotopic compositions of 75 sedimentologically and petrographically characterized chert samples with ages ranging from 2600 to 750 Ma using multi-collector inductively coupled plasma mass spectrometry. dSi values of the cherts analyzed in this study show a 7& range, from 4.29 to +2.85. This variability can be explained in part by (1) simple mixing of silica derived from continental...

A. Radunz3, P. Heb and G. H. Schmid3 a Lehrstuhl für Zellphysiologie, Fakultät für Biologie, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany b Central South Forestry University, Zhuzhou/Hunan 41206, People’s Republic of China Z. Naturforsch. 53c, 305-310 (1998); received February 5/March 6 , 1998 Aleurites montana, Tung Oil, a-Eleostearic Acid, Triglycerides, Phospholipids Th...

The study of terrestrial geomicrobiology and its relationship to rock weathering processes is an essential tool in developing analogues for similar processes that may have occurred on Mars. Most studies of manganese-enhanced rock varnish have focused on samples taken from warm arid desert regions. Here, we examine samples obtained from eolian-abraded lava flows of the 4700-4800 m high Ashikule ...

Rice husk is an agricultural waste that has the potential source of silica in low-cost zeolite synthesis. The objectives this study were 1) extraction rice husks as synthetic raw materials, 2) synthesis and characterized ZSM-5 from silica. Silica was carried out by soaking using a heated 15% NaOH solution. Furthermore, 10% HNO3 solution added to pH 7 for 12 hours. filtrate dried oven hours at 1...

present study dealt the removal of cr(vi) in a tannery industry wastewater using rice husk silica powder as an adsorbent.the experimental investigations have been carried out by using rice husk silica powder for different adsorption dosage, different contact time and different ph against the initial cr(vi) concentration of 292 mg/l. the maximum percentage removal of cr(vi) in the tannery indust...