scholarly journals Environmentally friendly cellulose-based polyelectrolytes in wastewater treatment

2017 ◽  
Vol 76 (6) ◽  
pp. 1490-1499 ◽  
Author(s):  
Kinga Grenda ◽  
Julien Arnold ◽  
José A. F. Gamelas ◽  
Maria G. Rasteiro
Keyword(s):  
Periodate Oxidation ◽  
Analytical Techniques ◽  
Paper Mill ◽  
Potential Solution ◽  
Colour Removal ◽  
Cellulose Fibres ◽  
Substitution Degree ◽  
Aldehyde Groups ◽  
Positively Charged ◽  
Reactive Aldehyde

Natural-based polyelectrolytes (PELs), with all the advantages coming from being produced from renewable and biodegradable sources, are a potential solution for the removal of dyes from wastewater. In this work, surplus Eucalyptus bleached cellulose fibres from a paper mill were modified to increase the charge and solubility of cellulose. First, reactive aldehyde groups were introduced in the cellulose backbone by periodate oxidation of cellulose. Further modification with alkylammonium produced positively charged cellulose-based PELs. The final products were characterized by several analytical techniques. The PEL with the highest substitution degree of cationic groups was evaluated for its performance in decolouration processes, bentonite being used as aid. This was found to be effective for colour removal of either anionic or cationic dyes. Bio-PELs can thus be considered as very favourable eco-friendly flocculation agents for decolouration of harsh effluents from several industries, considering their biodegradable nature and thus the ability to produce less sludge.

Preparing Process and Properties of Collagen Modified Cotton Fiber

2011 ◽  
Vol 236-238 ◽  
pp. 1415-1419 ◽  
Author(s):  
Yun Hui Xu ◽  
Zhao Fang Du
Keyword(s):  
Cotton Fiber ◽  
Treatment Time ◽  
Ph Value ◽  
Periodate Oxidation ◽  
Aqueous Acetic Acid ◽  
Collagen Concentration ◽  
Acid Media ◽  
Xps Characterization ◽  
Aldehyde Groups

In order to develop cotton fabric underwear with the health care function, the cotton fiber was modified with the collagen (CMCF) using periodate oxidation method. The aldehyde groups on the glucose chains of the oxidized cotton cellulose were reacted with the amino groups of collagen to obtain the CMCF, and the oxidized cellulose was crosslinked with collagen in aqueous acetic acid media. The effects of collagen concentration, treatment time, reaction temperature, pH value of solution and periodate concentration on the amount of collagen crosslinked on cotton fiber were respectively discussed, and the optimal reaction technology was obtained. XPS characterization of the modified cotton fiber showed a characteristic peak about 400.0–405.0 eV corresponding to collagen, which indicated that the collagen was combined on the surface of cotton fiber. The mechanical properties of the collagen modified cotton fiber were improved. The resulting CMCF is a new natural ecological fiber and has the extensive application as a carrier for the controlled release of drugs.

Phenol degradation and colour removal in submerged culture ofPleurotus sajor-cajuwith paper mill effluents

2007 ◽  
Vol 25 (1) ◽  
pp. 24-28 ◽  
Author(s):  
Fernanda Mosena Munari ◽  
Tamara Aparecida Gaio ◽  
Aldo José Pinheiro Dillon
Keyword(s):  
Submerged Culture ◽  
Phenol Degradation ◽  
Paper Mill ◽  
Colour Removal ◽  
Paper Mill Effluents

Polyacrolein microspheres as a new tool in cell biology

1982 ◽  
Vol 56 (1) ◽  
pp. 157-175
Author(s):  
S. Margel ◽  
U. Beitler ◽  
M. Ofarim
Keyword(s):  
Cell Biology ◽  
Polymerization Process ◽  
Amino Groups ◽  
Ph Values ◽  
Human Red Blood Cells ◽  
Primary Amino ◽  
Aldehyde Groups ◽  
Potential Use ◽  
Specific Labelling ◽  
Reactive Aldehyde

Polyacrolein (PA) microspheres in sizes ranging from 0.04 micron to 40 microns were synthesized. Magnetic and fluorescent PA microspheres were formed by carrying out the polymerization process in the presence of appropriate ferrofluidic or fluorochromic compounds, respectively. The microspheres carry reactive aldehyde groups, through which various ligands, containing primary amino groups, were covalently bound at physiological pH values. The potential use of these microspheres was demonstrated by the specific labelling of fresh human red blood cells (RBC) and by the separation of human RBC from turkey RBC by means of a magnetic field. PA microspheres were also bound covalently to the anti-allergic drug disodium chromoglycate (DSCG) and the conjugate was used for the labelling of rat basophilic leukaemia cells.

scholarly journals Pengaruh Pelaksanaan Program Keselamatan dan Kesehatan Kerja Terhadap Produktivitas Kerja Karyawan

2018 ◽  
Vol 3 (3) ◽  
pp. 12-23
Author(s):  
Renita Hadiyanti ◽  
Maya Setiawardani
Keyword(s):  
Health Program ◽  
Occupational Safety ◽  
Descriptive Analysis ◽  
Work Productivity ◽  
Analytical Techniques ◽  
Paper Mill ◽  
Occupational Safety And Health ◽  
Working Environment ◽  
Employee Productivity ◽  
Safety And Health

Human resources is a living asset owned by an organization that has an important role for the success of an organization. The success of human resource management as one of the benchmarks is in terms of employee productivity. The needs of employees in carrying out their work in order to achieve optimal work productivity need to be protected with a safe working environment, comfortable and serene, because it will cause the desire to work well. This research was conducted with the aim to know how the implementation of occupational safety and health program, how the productivity of employees work, and how much influence the implementation of occupational safety and health program on employees work productivity at PT Papyrus Sakti Paper Mill. The data collection tool in this research is by distributing questionnaires to 125 employees of production department. Analytical techniques used in the form of descriptive analysis techniques with quantitative approach. The result of descriptive statistical analysis for both variables shows the safety and health variables with employee productivity are in good category. Based on the results of testing on the implementation of occupational safety and health have a positive and significant effect on work productivity of employees. It can be proven from the calculation t count = 6.359> t table = 1.979 with the percentage of influence of 24.7%.

scholarly journals Identification of glycoproteins associated with elastin-associated microfibrils.

1985 ◽  
Vol 33 (4) ◽  
pp. 287-294 ◽  
Author(s):  
J C Fanning ◽  
E G Cleary
Keyword(s):  
Lectin Binding ◽  
Periodic Acid ◽  
Periodate Oxidation ◽  
Ruthenium Red ◽  
Elastic Tissue ◽  
Electron Microscopic ◽  
Periodic Acid Schiff ◽  
Mature Adult ◽  
Aldehyde Groups ◽  
Nuchal Ligament

The microfibrils associated with elastic tissue have been shown to be predominantly proteinaceous. On the basis of their affinity for cationic stains, including ruthenium red, they have been assumed to be glycoprotein, but more evidence to support this claim has not been adduced. Despite repeated investigation of glycoprotein materials obtained by extraction of elastic tissues with reagents that appear to remove microfibrils, the chemical composition of elastin-associated microfibrils remains obscure. An electron microscopic study of the microfibrils in two elastin-rich tissues (bovine nuchal ligament and aorta) during their development was pursued using more specific histochemical methods. The periodic acid-alkaline bismuth stain (analogous to the periodic acid-Schiff stain for glycoproteins in light microscopy) has been adapted for this study. Specific aldehyde groups (confirmed by blocking with m-aminophenol or sodium borohydride) were identified after periodate oxidation as fine granules of bismuth stain. These were shown to localize specifically along the elastin-associated microfibrils in a finely punctate form. Staining of the amorphous elastic component did not occur except for a fine rim adjacent to the microfibrils. Lectin binding with concanavalin A (with ferritin markers) confirmed that there are glucose- or mannose-containing proteins associated with the microfibrillar component of elastic tissue. This was true of these microfibrils in all layers of the aortic wall and throughout the ligament. It was also true of mature adult tissues in which there was a lesser proportion of microfibrils. It is concluded that elastin-associated microfibrils really are associated with glycoprotein(s).

scholarly journals MODIFICATION OF INULINE BY IODIC ACID

2020 ◽  
pp. 57-60
Keyword(s):  
Ir Spectra ◽  
Iodine Number ◽  
Oxidation State ◽  
Iodic Acid ◽  
Molecular Weights ◽  
Aldehyde Groups ◽  
Reactive Aldehyde

In order to further modify inulin with drugs, the process of introducing reactive aldehyde groups into the inulin macromolecule was carried out. Aldehyde groups were introduced by oxidizing inulin with iodic acid. The process of oxidation of inulin and cellulose with iodic acid was compared. The quantities of aldehyde groups in the oxidized samples were estimated, their molecular weights were determined, IR spectra were measured, the iodine number of the inulin dialdehyde and their oxidation state were determined.

Further Ultrastructural Observations on Polysaccharide Localization in Plant Cells

1968 ◽  
Vol 3 (1) ◽  
pp. 55-64
Author(s):  
J. D. PICKETT-HEAPS
Keyword(s):  
Cell Wall ◽  
Periodic Acid ◽  
Periodate Oxidation ◽  
Plant Cells ◽  
Primary Cell Wall ◽  
Root Tip ◽  
Root Tips ◽  
Golgi Bodies ◽  
Golgi Vesicles ◽  
Aldehyde Groups

Standard periodic acid/Schiff (PAS) techniques have not shown the existence of aldehyde groups in sections of glutaraldehyde-fixed, Araldite-embedded root-tip tissue; peroxidation of such sections resulted in a typical PAS staining pattern. Permanganate-fixed root tips also gave a weak PAS reaction which was intensified by prior peroxidation of the sections. At the ultrastructural level, silver hexamine was used to detect aldehyde groups produced in polysaccharide by permanganate and/or periodate oxidation. Golgi vesicles and slime material in root-cap cells always reacted strongly; the cell wall proper was less reactive. A marked increase in the stainability of the vesicles was evident, the further removed they were from Golgi bodies. This also occurred in root epidermal cells. In both these types of cells, smallersized vesicles and/or the contents of reticulate Golgi cisternae showed evidence of histochemical staining. In meristematic root tip cells, vesicles closely apposed to Golgi bodies did not stain convincingly, though cell walls stained readily. During cell-plate formation, however, both smaller (possibly Golgi) and larger vesicles (phragmoplasts) stained strongly. The walls of permanganate-fixed sieve-tube cells also stained quite strongly, but callose did not unless the tissue block had been treated with periodate before being embedded. In glutaraldehyde-fixed xylem cells, older wall thickenings reacted very strongly even when the sections had been blocked with iodoacetate and bisulphite (which rendered the rest of the section unreactive). If similar sections of younger xylem cells were peroxidized after such blocking reactions, the primary cell wall and the wall thickenings stained, as did many of the Golgi vesicles. The results are related to other experimental observations, both ultrastructural and histochemical, on plant cells.

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