Search Results - "Stevens, Willem F."

Ionotropic cross-linked chitosan microspheres for controlled release of ampicillin by Anal, Anil K., Stevens, Willem F., Remuñán-López, Carmen

“…The solubility of non cross-linked chitosan in weak acid solutions restricts its utility in microspheres for drug delivery. The primary aim of this study was…”
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Chitosan as a growth stimulator in orchid tissue culture by Nge, Khin Lay, Nwe, Nitar, Chandrkrachang, Suwalee, Stevens, Willem F.

“…The effect of shrimp and fungal chitosan on the growth and development of orchid plant meristemic tissue in culture was investigated in liquid and on solid…”
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Functional characteristics of shrimp chitosan and its membranes as affected by the degree of deacetylation by Trung, Trang Si, Thein-Han, Wah Wah, Qui, Nguyen Thi, Ng, Chuen-How, Stevens, Willem F.

“…The functional properties of three shrimp chitosan preparations with different degrees of deacetylation (75%, 87% and 96% DD) but with a constant molecular…”
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Characterization of chitosan and chitosan–glucan complex extracted from the cell wall of fungus Gongronella butleri USDB 0201 by enzymatic method by Nwe, Nitar, Stevens, Willem F., Tokura, Seiichi, Tamura, Hiroshi

“…The fungus Gongronella butleri USDB 0201 was grown on sweet potato pieces supplemented with mineral and urea solution. Mycelia were harvested after 7 days of…”
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Chitosan-Alginate Multilayer Beads for Gastric Passage and Controlled Intestinal Release of Protein by Anal, Anil K., Bhopatkar, Deepak, Tokura, Seiichi, Tamura, Hiroshi, Stevens, Willem F.

“…Abstract Chitosan-alginate beads loaded with a model protein, bovine serum albumin (BSA) were investigated to explore the temporary protection of protein…”
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Improved method for production of chitin and chitosan from shrimp shells by Trung, Trang Si, Tram, Le Huyen, Van Tan, Nguyen, Van Hoa, Nguyen, Minh, Nguyen Cong, Loc, Phan Thanh, Stevens, Willem F.

“…In this study, pretreatment procedures have been investigated preceding the standard production of chitin and chitosan. These steps can be used in industrial…”
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Production of N-acetyl chitobiose from various chitin substrates using commercial enzymes by Ilankovan, Paraman, Hein, San, Ng, Chuen-How, Trung, Trang Si, Stevens, Willem F.

“…N-acetyl chitobiose was produced by partial hydrolysis of the marine biopolymer chitin using industrially bulk-produced enzyme preparations. Pepsin showed the…”
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Production of high-quality chitin and chitosan from preconditioned shrimp shells by Toan, Nguyen Van, Ng, Chuen-How, Aye, Kyaw Nyein, Trang, Trung Si, Stevens, Willem F.

“…Chitin and chitosan with improved characteristics were produced from shrimp shell waste preconditioned by limited decay or by treatment with 0.016 mol L−1…”
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Effect of urea on fungal chitosan production in solid substrate fermentation by Nwe, Nitar, Stevens, Willem F

“…The fungus Gongronella butleri USDB 0201 was grown on sweet potato pieces supplied with different amounts of urea at 26 °C for 7 days under sterilized and…”
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Preparation of water soluble hydrochloric chitosan from low molecular weight chitosan in the solid state by Minh, Nguyen Cong, Nguyen, Van Hoa, Schwarz, Simona, Stevens, Willem F., Trung, Trang Si

“…In this study, low molecular weight chitosan salt (LMWC-HCl) highly soluble in water was prepared from low molecular weight chitosan (LMWC) in the solid state…”
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Laboratory scale production of 13C labeled chitosan by fungi Absidia coerulea and Gongronella butleri grown in solid substrate and submerged fermentation by Nwe, Nitar, Furuike, Tetsuya, Osaka, Issey, Fujimori, Hiroki, Kawasaki, Hideya, Arakawa, Ryuichi, Tokura, Seiichi, Stevens, Willem F., Kurozumi, Seiji, Takamori, Yoshimori, Fukuda, Minoru, Tamura, Hiroshi

“…Nowadays, chitin and chitosan are applied in many medical and pharmaceutical products. However little is known about the metabolism of chitin and chitosan in…”
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Decomposition of myceliar matrix and extraction of chitosan from Gongronella butleri USDB 0201 and Absidia coerulea ATCC 14076 by Nwe, Nitar, Stevens, Willem F., Montet, Didier, Tokura, Seiichi, Tamura, Hiroshi

“…Free chitosan, 2 g/100 g mycelia from Gongronella butleri and 6.5 g/100g mycelia from Absidia coerulea were isolated by 1 M NaOH at 45 °C for 13 h and 0.35 M…”
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Production of fungal chitosan by solid state and submerged fermentation by Nwe, Nitar, Chandrkrachang, Suwalee, Stevens, Willem F, Maw, Theingi, Tan, Teck Koon, Khor, Eugene, Wong, Sek Man

“…The growth of the fungus Gongronella butleri USDB 0201 was compared in solid state fermentation (SSF) and submerged fermentation (SMF) using various nitrogen…”
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Production of fungal chitosan by solid substrate fermentation followed by enzymatic extraction by NWE, Nitar, STEVENS, Willem F

“…An improved method is described for the production of chitosan from mycelia of the fungus Gongronella butleri, grown by solid substrate fermentation on sweet…”
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Valorization of Heavy Waste of Modern Intensive Shrimp Farming as a Potential Source for Chitin and Chitosan Production by Phuong, Pham Thi Dan, Trung, Trang Si, Stevens, Willem F., Minh, Nguyen Cong, Bao, Huynh Nguyen Duy, Hoa, Nguyen Van

“…Sustainable development regarding safely reusing waste and the transformation of waste to valuable products is emerging as a strong trend. This study presents…”
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Swelling-assisted reduction of chitosan molecular weight in the solid state using hydrogen peroxide by Minh, Nguyen Cong, Cuong, Hoang Ngoc, Phuong, Pham Thi Dan, Schwarz, Simona, Stevens, Willem F., Van Hoa, Nguyen, Trung, Trang Si

“…Chitosan in the solid state has been degraded in a controlled way by treatment with hydrogen peroxide at room temperature. Chitosan was swollen in diluted…”
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Chitosan isolation from the chitosan-glucan complex of fungal cell wall using amylolytic enzymes by NWE, Nitar, STEVENS, Willem F

“…The chitosan/glucan complex isolated from the mycelia of the fungus, Gongronella butleri USDB 0201 can be cleaved with a heat-stable α-amylase at 65 °C for 3…”
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Chitosan–alginate multilayer beads for controlled release of ampicillin by Anal, Anil K., Stevens, Willem F.

“…The aim of this study is to develop multilayer beads with improved properties for controlled delivery of the antibiotic ampicillin. Ionotropic gelation was…”
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Chitin production by Lactobacillus fermentation of shrimp biowaste in a drum reactor and its chemical conversion to chitosan by Rao, M.S, Stevens, W.F

“…Chitin was produced by fermenting shrimp heads and shells with Lactobacillus plantarum 541 in a drum reactor with an internal volume of 3 dm3. The crude chitin…”
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Molecular stability of chitosan in acid solutions stored at various conditions by Nguyen, Thi Thanh Binh, Hein, San, Ng, Chuen-How, Stevens, Willem F

“…The stability of chitosan with a degree of deacetylation (DD) of 88 and 81% was investigated in solution during storage for 60 days at various temperatures…”
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