Bagasse Wet-Stored with the Hypochlorite Bleaching Waste Water

2013 ◽  
Vol 295-298 ◽  
pp. 198-201 ◽  
Author(s):  
Bing Sun ◽  
Li Bao ◽  
Yu Xin Liu

In this paper, the bagasse was wet stored by hypochlorite bleaching waste water with or without chlorine. The dissolution ability of lignin, total sugar and reducing sugar was investigated. Then the effluent properties with the wet storage time prolonging were tested. The results showed that some small molecular weight substances were dissolved from baggase, such as sugar and lignin. And the dissolution ability of hypochlorite bleaching waste water with chlorine was better than that of hypochlorite bleaching waste water without chlorine. And the change trend of effluent properties for the two wet storage system were similar. With the wet storage time extending, the dissolved substances were degraded, COD and chroma of effluent were decreased, and the properties of effluent were improved.

2012 ◽  
Vol 610-613 ◽  
pp. 3362-3366
Author(s):  
Li Bao ◽  
Bing Sun ◽  
Yu Xin Liu ◽  
Rui Qi Zhang

In this paper, the effect of hemicellulase treatment on the properties of bagasse and treatment liquor was investigated, and the chemical components of bagasse after optimized hemicellulase treatment were compared with those of wet-stored bagasse. The research results showed that small molecular sugar and lignin in bagasse were dissolved in hemicellulase treatment process, and most of the sugar was non reducing sugar. The lignin dissolution rate of hemicellulase treatment was twice as much as that of wet storage, and hemicellulase treatment had relatively smaller effect on carbohydrate, especially to cellulose. In addition, the improving effect of bagasse properties with pulpzyme HC treatment was better than that of Nz51024 treatment.


Author(s):  
H.A. Cohen ◽  
W. Chiu ◽  
J. Hosoda

GP 32 (molecular weight 35000) is a T4 bacteriophage protein that destabilizes the DNA helix. The fragment GP32*I (77% of the total weight), which destabilizes helices better than does the parent molecule, crystallizes as platelets thin enough for electron diffraction and electron imaging. In this paper we discuss the structure of this protein as revealed in images reconstructed from stained and unstained crystals.Crystals were prepared as previously described. Crystals for electron microscopy were pelleted from the buffer suspension, washed in distilled water, and resuspended in 1% glucose. Two lambda droplets were placed on grids over freshly evaporated carbon, allowed to sit for five minutes, and then were drained. Stained crystals were prepared the same way, except that prior to draining the droplet, two lambda of aqueous 1% uranyl acetate solution were applied for 20 seconds. Micrographs were produced using less than 2 e/Å2 for unstained crystals or less than 8 e/Å2 for stained crystals.


2019 ◽  
Vol 7 (1) ◽  
pp. 11-16
Author(s):  
Abdulkhaleq K Mahmood ◽  
Ali A Kamal ◽  
Ako R Hama

The scarcity of safe drinking water is one of the problems faced by the majority of cities in the world. Kirkuk city is one of these cities, which suffer from a shortage of drinking water. People have adopted the use of different rooftop tanks to overcome this problem. This research focuses on studying the effect of storage time on the five main characteristics of drinking water, which include, acid index (pH), electrical conductivity (EC), total suspended solids (TSS), total dissolved solids (TDS), and turbidity (Tr). Three types of tanks were used predominantly (galvanized metal, plastic, and aluminum tanks). By analyzing the results, the characteristics of three samples of municipal source water obtained. Three samples were taken from each tank at different periods (4, 8, and 12 days). The results showed that the storage time affected the characteristics of drinking water. These characteristics differed from one tank to another. Metal tanks showed an increase in total dissolved solids, due to the evaporation process, even as plastic and aluminum tanks showed an increase in pH. The properties of all storage water tanks changed with times, but overall, the results were within the Iraqi limitation for drinking water. It was not easy to only depend on the results of this study to believe that any one type of water tank was better than the other, as the values of most of the variables studied had varied from one type to other. However, many studies have indicated a number of health risks, and most significantly with regard to plastic tanks, which are said to contain dangerous organic compounds that can be transferred to water. Metal tanks can cause zinc leakage, caused by a number of environmental factors at high levels. Aluminum tanks also can have an effect on the water in tanks.


Biologia ◽  
2019 ◽  
Vol 75 (1) ◽  
pp. 139-149
Author(s):  
Venkatesh Bommalapura Kulkarni ◽  
Raghu Ram Achar ◽  
Maheshwari Mahadevappa ◽  
Dinesh Sosalagere Manjegowda ◽  
Priya Babu Shubha ◽  
...  

1974 ◽  
Vol 52 (3) ◽  
pp. 231-240 ◽  
Author(s):  
A. H. Warner ◽  
P. C. Beers ◽  
F. L. Huang

An enzyme that catalyzes the synthesis of P1P4-diguanosine 5′-tetraphosphate (Gp4G) has been isolated and purified from yolk platelets of encysted embryos of the brine shrimp, Artemia salina. The enzyme GTP:GTP guanylyltransferase (Gp4G synthetase) utilizes GTP as substrate, has a pH optimum of 5.9–6.0, a temperature optimum of 40–42 °C, and requires Mg2+ and dithiothreitol for optimal activity. The synthesis of Gp4G is inhibited markedly by pyrophosphate, whereas orthophosphate has no effect on the reaction. In the presence of GDP the enzyme also catalyzes the synthesis of P1,P3-diguanosine 5′-triphosphate (Gp3G), but the rate of synthesis is low compared with Gp4G synthesis and dependent upon other small molecular weight components of yolk platelets.


2010 ◽  
Vol 24 (5) ◽  
pp. 1373-1378 ◽  
Author(s):  
Juan Sun ◽  
Yan Wu ◽  
Zhuang Su ◽  
Zhifang Liu ◽  
Bingzhong Su ◽  
...  

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