The application of enzymes has a high potential in the pulp and paper industry to improve the economics of the paper production process and to achieve, at the same time, a reduced environmental burden. Specific enzymes contribute to reduce the amount of chemicals, water and energy in various processes. This review is aimed at presenting the latest progresses of applying enzymes in bio-pulping, bio-bleaching, bio-deinking, enzymatic control of pitch and enzymatic modification of fibers.
Enzymes ; Industry ; Paper

Pitch deposits have negative effects on product quality, machine performance and production line profitability during pulp and paper manufacture. As traditional pitch control technology cannot provide satisfactory solutions in the pitch deposits, the enzymatic treatment has been rapidly developed for its high efficiency and pollution-free property. In this review, the chemical composition and present form of the pitch in pulp is first introduced, followed by a description of the pitch control enzymes. The emphasis is on the current research on enzymatic solutions to pitch problems, including the reaction mechanism, technology, and the present main problems of lipase, sterol esterases, laccase and lipoxygenase. Finally, the technology prospects in this field are proposed.
Laccase ; Lipase ; Lipoxygenase ; Paper

Adult ; Computer Terminals ; Humans ; Male ; Paper ; Reading ; Students, Medical ; Workload

The ability to use dry blood spots (DBSs) on filter paper for the analysis of urea levels could be an important diagnostic tool for areas that have limited access to laboratory facilities. We developed a method for the extraction and quantification of urea from DBSs that were stored on 3M Whatman filter paper and investigated the effect of long-term storage on the level of urea in DBSs. DBSs of 4.5 mm in diameter were used for our assay, and we determined the urea levels in blood using a commercially available enzymatic kit (UV GLDH-method; Randox laboratories Ltd., UK). The DBSs on filter discs were stored at 4degrees C or at 37degrees C for 120 days. The mean intra- and inter-assay coefficient of variance for our method of urea extraction from dried blood was 4.2% and 6.3%, respectively. We collected 75 fresh blood samples and compared the urea content of each fresh sample with the urea content of DBSs taken from corresponding fresh blood samples. Regression analysis reported a regression coefficient (r) value of 0.97 and a recovery of urea from dried spots was 102.2%. Urea concentrations in DBSs were stable for up to 120 and 90 days when stored at 4degrees C and 37degrees C, respectively. Our results show that urea can be stored and quantitatively recovered from small volumes of blood that was collected on filter paper.
*Dried Blood Spot Testing ; Filtration ; Humans ; Paper ; Regression Analysis ; Temperature ; Urea/*blood

The ability to use dry blood spots (DBSs) on filter paper for the analysis of urea levels could be an important diagnostic tool for areas that have limited access to laboratory facilities. We developed a method for the extraction and quantification of urea from DBSs that were stored on 3M Whatman filter paper and investigated the effect of long-term storage on the level of urea in DBSs. DBSs of 4.5 mm in diameter were used for our assay, and we determined the urea levels in blood using a commercially available enzymatic kit (UV GLDH-method; Randox laboratories Ltd., UK). The DBSs on filter discs were stored at 4degrees C or at 37degrees C for 120 days. The mean intra- and inter-assay coefficient of variance for our method of urea extraction from dried blood was 4.2% and 6.3%, respectively. We collected 75 fresh blood samples and compared the urea content of each fresh sample with the urea content of DBSs taken from corresponding fresh blood samples. Regression analysis reported a regression coefficient (r) value of 0.97 and a recovery of urea from dried spots was 102.2%. Urea concentrations in DBSs were stable for up to 120 and 90 days when stored at 4degrees C and 37degrees C, respectively. Our results show that urea can be stored and quantitatively recovered from small volumes of blood that was collected on filter paper.
*Dried Blood Spot Testing ; Filtration ; Humans ; Paper ; Regression Analysis ; Temperature ; Urea/*blood

We report an atypieal case of xanthoma without evidence of underlying disease, A 50-year-old asymptomatic, yellowish, flat plaques on the upper eyelids, trunk and thighs, and huge, deep-seated tumors on anterior aspect of the neck, back and ankle areas of 3 years duration. Biopsies were performed at the lesions of the neck and hack. Two biopsy specimens showed the same findings of xanthoma, respectively. The appearance of refrigerated serum was clear. Paper electrophoresis didn't show elevation of any lipoprotein, suggesting normolipoproteinemia.
Ankle ; Biopsy ; Electrophoresis, Paper ; Eyelids ; Humans ; Lipoproteins ; Middle Aged ; Neck ; Thigh ; Xanthomatosis*

PURPOSE: Ethylenediamine-tetramethylenephosphonic acid (EDTMP) has widely used chelator for the labeling of bone seeking radiopharmaceuticals complexed with radiometals. 153Sm can be produced by the HANARO reactor at the Korea Atomic Energy Research Institute, Taejon, Korea. 153Sm has favourable radiation characteristics T1/2=46.7 h, beta max=0.81 MeV (20%), 0.71 MeV (49%), 0.64 MeV (30%) and gamma=103 keV (30%) emission which is suitable for imaging purposes during therapy. We investigated the labeling condition of 153Sm-EDTMP and imaging of 153Sm-EDTMP in normal rats. MATERIALS AND METHODS: EDTMP 20 mg was solved in 0.1 mL 2 M NaOH. 153SmCl3 was added to EDTMP solution and pH of the reaction mixtures was adjusted to 8 and 12, respectively. Radiochemical purity was determined with paper chromatography. After 30 min. reaction, reaction mixtures were neutralized to pH 7.4, and the stability was estimated upto 120 hrs. Imaging studies of each reaction were perfomed in normal rats (37 MBq/0.1 mL). RESULTS: The labeling yield of 153Sm-EDTMP was 99%. The stability of pH 8 reaction at 60, 96 and 120 hr was 99%, 95%, 89% and that of pH 12 at 36, 60, 96 and 120 hr was 99%, 95%, 88%, 66%, respectively. The 153Sm-EDTMP showed constantly higher bone uptake from 2 to 48 hr after injection. CONCLUSION: 153Sm-EDTMP, labeled at pH 8 reaction condition, has been stably maintained. Image of 153Sm-EDTMP at 2, 24, 48 hr after injection, demonstrate that 153Sm-EDTMP is a good bone seeking radiopharmaceuticals.
Academies and Institutes ; Animals* ; Chromatography, Paper ; Daejeon ; Hydrogen-Ion Concentration ; Korea ; Nuclear Energy ; Radiopharmaceuticals ; Rats

Many reports have been found in the literature regarding the electrophoretic study of various urogenital diseases, but those on syphilis are relatively rare. It is author's opinion that the correlation between syphilis and the dysfunction of various organs must also be elucidated into detail. On this view point the author has studied the total protein and paper electrophoretic fractions of the serum derived from the patients of syphilis in 17 males and 5 females visited our department during the period from October, 1962 to September, 1964 Age distribution was between 18 and 45 years of age and duration of history was from 3 months to 8 months. The results obtained were as follows: 1. Total protein and electrophoretic fractions of 22 patients' serum: a) The amount of total protein decreased slightly. b) Albumin decreased markedly. c) Alpha 1 globulin decreased remarkably. d) Alpha 2 globulin decreased slightly. e) Beta globulin increased very remarkably. f) Gamma globulin increased markedly. g) A/G ratio decreased very remarkably. All of the above patterns were compared with normal rate. 2. Total protein and electrophoretic fractions of same 22 patients' serum in duration 30 days after complete therapy: a) The amount of total protein, albumin alpha 2 globulin, gamma globulin and A/G ratio etc. are unchanged b) Alpha 1 globulin decreased markedly. c) Beta globulin increased slightly. All of the above pattern were compared with normal rate.
Age Distribution ; Beta-Globulins ; Electrophoresis, Paper ; Female ; gamma-Globulins ; Humans ; Male ; Syphilis

This study was designed to prospect the 'In-labelled paclitaxel as tumor imaging agent. In order to provide a taxol molecule with a functional group which is able to chelate In-lll, taxol-DTPA conjugate and 2-hemisuccinyltaxol were synthesized by esterification of taxol at C-2 on C-13 carbon with DTPA anhydride and succinic anhydride, respectively. Synthesis yield of the taxol derivatives was 34% for taxol- DTPA and 80% for 2'-hemisuccinyltaxol. Cytotoxicity of the taxol derivatives were measured by MTT method toward cell lines HT29, B16, P388, and CT26. The cytotoxic activities of the taxol derivatives were maintained, although less active than taxol. Radiolabelling of the taxol derivatives were proceeded directly with 111InCh or indirectly with 111In-citrate(ligand-exchange method). The ligand-exchane methocl was not suitable because some precipitat:es appeared during the reaction. On the contrary, by direct radiolabelling methnd, we were able to obtain taxol DTPA-111In in 100% radiochemical yield. However, 2'-hemisuccinyltaxol was not labellecl by both methods. Yield and radiochemiral purity of the radiolabelled com- pound were determined by HPI.C, paper chromatography and instant thin layer chromatography. Taxol-DTPA-111In was characterized to be hydrophilic by lipophi- licity test, and nearly non-adhesive to HT29, E316, P388, and CT26 by cell hinding affinity test. Binding affinity of the taxol-DTPA-111In complex to serum proteins was also examined by protein precipitation with 30% trichloroacetic acid. The results showed that 309o of the taxol-DTPA-111In complex binds with serum proteins.
Blood Proteins ; Carbon ; Cell Line ; Chromatography, Paper ; Chromatography, Thin Layer ; Esterification ; Paclitaxel* ; Pentetic Acid ; Trichloroacetic Acid

Radioactive (14)C-glucose(U) was given to Clonorchis sinensis in Tris buffer medium, in corder to trace the metabolic fate of the labelled carbon. The labelled carbon from glucose enters into intermediary metabolites and end products of anaeroblic glycolysis, Embden-Meyerhof pathway, and of aerobic Krebs cycle. These product were identified by one or two-dimensional paper chromatography in combination with autoradoigraphy. The labelled metabolites detected in this experiment corresponded to pyruvic acid, latic acid, malic acid, succinic acid and fumaric acid. Amino acids, such as alanine, aspartic acid, glutamic acid, valine, theronine, and serine, derived by the degradation of (14)C- glycose were also found. Labelled compounds behaving like alanine, aspartic acid and glutamic acid were observed in the chroma to gram of incubation medium. The preciptation which suggests a positive reaction for protein occured when absolute ethanol was added to the incubation medium.
parasitology-helminth-trematoda ; Clonorchis sinensis ; two-dimensional paper chromatography ; autoradiography ; metabolism ; glucose