journal
MENU ▼
Read by QxMD icon Read
search

Biocontrol Science

journal
https://www.readbyqxmd.com/read/28367872/detection-method-for-aquatic-bacteria-of-the-fingers-as-a-potential-origin-of-the-aqueous-solution-contamination
#1
Eiichi Osono, Kazumi Honda, Yuki Inoue, Yoshihiko Norose, Megumi Takahashi, Kyoko Ichimura, Chisako Kamano, Eiji Shinya, Shun Takaku, Kentaro Okamatsu, Shinya Kawamoto, Hideaki Takizawa, Hidemi Takahashi
 Aquatic bacteria were isolated from the hands of working staffs by an adapted culture protocol. When the sample solution obtained by the" glove juice method" was incubated for 3 days at room temperature, viable cell counts increased up to 10(5)-fold, and the majority of the isolated colonies were shown to be Gram-negative aquatic bacteria, which carry the risk of contaminating water. Using R2A medium, coagulase-negative staphylococci were the dominant microbes immediately after recovery from the hands. Here it was revealed that bacteria of the phylum Proteobacteria isolated from the hand can be the causative bacteria of aqueous contamination...
2017: Biocontrol Science
https://www.readbyqxmd.com/read/28367871/occurrence-of%C3%A2-cronobacter%C3%A2-spp-in-dried-foods-%C3%A2-fresh-vegetables-and-soil
#2
Shigeko Ueda
 The present study surveyed the occurrence of Cronobacter spp. in dried foods including milk powder, spices and herbs and others, and fresh vegetables commercially available in markets, and ground soil materials for the agriculture. Cronobacter spp. were isolated from 15% of 33 spice and herb samples and 3% of 36 taste foods, and these were C. turicensis, C. malonaticus, C. sakazakii and C. dubliensis. Cronobacter spp. from fresh vegetables were detected in 12% of field vegetables and 13% of hydroponic vegetables...
2017: Biocontrol Science
https://www.readbyqxmd.com/read/28367870/comparison-of-quantitative-antifungal-testing-methods-for-textile-fabrics
#3
Yasuo Imoto, Satoshi Seino, Takashi Nakagawa, Takao A Yamamoto
 Quantitative antifungal testing methods for textile fabrics under growth-supportive conditions were studied. Fungal growth activities on unfinished textile fabrics and textile fabrics modified with Ag nanoparticles were investigated using the colony counting method and the luminescence method. Morphological changes of the fungi during incubation were investigated by microscopic observation. Comparison of the results indicated that the fungal growth activity values obtained with the colony counting method depended on the morphological state of the fungi on textile fabrics, whereas those obtained with the luminescence method did not...
2017: Biocontrol Science
https://www.readbyqxmd.com/read/28367869/aflatoxin-b1-contamination-of-dairy-feeds-after-storage-in-farm-practice-in-tropical-environmen
#4
Wantanwa Mongkon, Yoshiko Sugita-Konishi, Wasana Chaisri, Witaya Suriyasathaporn
 The objective of this study was to determine the contamination of aflatoxin B1 (AF-B1) when keeping various dairy feeds in a farm environment. The study was carried out from March to May 2011 and involved 63 small holder dairy farms belonging to a single dairy cooperative in Chiang Mai province, Thailand. All feed samples used for milking cows including 4 commercial concentrates (CC1 to CC4), by-products from local corn processing factories fermented in plastic bags (SIL), and corn and cob meal or corn dust (CCD)...
2017: Biocontrol Science
https://www.readbyqxmd.com/read/28367868/inhibitory-effects-of-thai-essential-oils-on-potentially-aflatoxigenic-aspergillus-parasiticus-and-aspergillus-flavus
#5
Kittika Jantapan, Amnart Poapolathep, Kanjana Imsilp, Saranya Poapolathep, Phanwimol Tanhan, Susumu Kumagai, Usuma Jermnak
 The antiaflatoxigenic and antifungal activities of essential oils (EOs) of finger root (Boesenbergia rotunda (L.) Mansf.), pine (Pinus pinaster), rosewood (Aniba rosaedora), Siam benzoin (Styrax tonkinensis), Thai moringa (Moringa oleifera), and ylang ylang (Cananga odorata) were tested for Aspergillus parasiticus and Aspergillus flavus in potato dextrose broth. Aflatoxin B1 (AFB1) was extracted from culture using a QuEChERS-based extraction procedure and analyzed with high performance liquid chromatography (HPLC) coupled to a fluorescence detector...
2017: Biocontrol Science
https://www.readbyqxmd.com/read/28367867/kinetics-of-the-inactivation-of-vibrio-parahaemolyticus-in-weakly-acidic-sodium-chlorite-solution
#6
Kazuhiro Takahashi, Reiji Tanaka, Satoshi Fukuzaki
 The kinetics of the inactivation of Vibrio parahaemolyticus in sodium chlorite (NaClO2) solution was studied in the weakly acidic pH range of 4.0 to 6.5 and at various temperatures. The logarithmic reduction of the survival ratio depended on the concentration-time product, and all the inactivation curves showed a linear reduction phase. The first-order inactivation rate constant (k) increased by approximately twice for every 0.44 unit fall in pH. During the inactivation experiments, no formation of chlorine dioxide occurred...
2017: Biocontrol Science
https://www.readbyqxmd.com/read/28367866/degradation-of-total-petroleum-hydrocarbon-tph-in-contaminated-soil-using-bacillus-pumilus-mvsv3
#7
Surendra Sheeba Varma, Mahalingam Brinda Lakshmi, Perumalsam Rajagopal, Manickam Velan
 A study on bioremediation of soil contaminated with petroleum sludge was performed using Bacillus pumilus/MVSV3 (Accession number JN089707). In this study, 5 kg of agricultural soil was mixed well with 5% oil sludge and fertilizers containing nitrogen, phosphorus and potassium (N:P:K). The treatment resulted in 97% removal of total petroleum hydrocarbon (TPH) in 122 d in bacteria mixed contaminated soil when compared to 12% removal of TPH in uninoculated contaminated soil. The population of the microorganism remained stable after introduced into the oil environment...
2017: Biocontrol Science
https://www.readbyqxmd.com/read/28367865/ethylene-oxide-gas-sterilization-of-medical-devices
#8
REVIEW
Hideharu Shintani
 Ethylene oxide gas is an agent in the sterilization of medical devices due to its effectiveness and compatibility with most materials. The advantages and disadvantages, as well as its recommended uses, are explored in this review article. The variables and their relevance on process optimization are described, the types of processing cycles are detailed and emphasis is given to the design and validation of the sterilization process.
2017: Biocontrol Science
https://www.readbyqxmd.com/read/28003634/inactivation-of-vibrio-parahaemolyticus-unattached-and-attached-to-a-solid-surface-in-ph-controlled-sodium-hypochlorite-solutions
#9
Kazuhiro Takahashi, Reiji Tanaka, Satoshi Fukuzaki
 The inactivation of Vibrio parahaemolyticus cells that were unattached or attached to a polyethylene terephthalate (PET) disc in pH-controlled sodium hypochlorite (NaOCl) solutions was studied under turbulent conditions. No significant desorption of attached cells occurred at the free available chlorine (FAC) concentrations from 0.1 to 1.0 mg/l. The number of viable cells was estimated by microbial calorimetry. The logarithmic relative reduction of viable cells was proportional to the product of the FAC concentration and time...
2016: Biocontrol Science
https://www.readbyqxmd.com/read/28003633/influence-of-detection-methods-in-characterizing-escherichia-coli-o157-h7-in-raw-goat-meat-using-conventional-and-molecular-methods
#10
Zajeba Tabashsum, Mafruha Nazneen, C R Ahsan, M L Bari, M Yasmin
 Presence of Escherichia coli O157:H7 on fresh goat meat samples (n= 40) of Dhaka city was analyzed using conventional and molecular methods. A total of 86 presumptive E. coli O157:H7 colonies were isolated from 60% of the samples using selective agar plating method. After conventional biochemical assay followed by API 20E assay, only 11 isolates were found to be E. coli O157:H7. Further serological test identified only four isolates that has strong agglutination reaction against anti-H7 sensitized latex...
2016: Biocontrol Science
https://www.readbyqxmd.com/read/28003632/isolation-and-characterization-of-a-variant-manganese-resistant-strain-of-saccharomyces-cerevisiae
#11
Tuan Anh DO, Toshio Sakai, Masao Kishida, Masakazu Furuta
 Manganese contamination in water is one of the most serious problems in Southeast Asian countries, including Vietnam. Bioremediation using microorganisms, especially from the brewing yeast Saccharomyces cerevisiae, is expected to be a useful technique to remove manganese from contaminated water. Yeast strain S. cerevisiae BY4741 as the wild-type strain and some manganese-accumulating mutants bred from BY4741 were examined for cell growth and manganese accumulation in YPD liquid medium containing various concentrations of Mn(2+)...
2016: Biocontrol Science
https://www.readbyqxmd.com/read/28003631/bacterial-and-fungal-counts-of-dried-and-semi-dried-foods-collected-from-dhaka-bangladesh-and-their-reduction-methods
#12
Farahnaaz Feroz, Hiromi Shimizu, Terumi Nishioka, Miho Mori, Yoshikazu Sakagami
 Food is a basic necessity for human survival, but it is still the vehicle for the transmission of food borne disease. Various studies have examined the roles of spices, herbs, nuts, and semi-dried fruits, making the need for safe and convenient methods of decontamination a necessity. The current study determined the bacterial and fungal loads of 26 spices and herbs, 5 nuts, 10 semi-dried fruits and 5 other foods. Spices, herbs and semi-dried foods demonstrated the highest bacterial and fungal loads with the majority showing over 10(4) CFU/mL...
2016: Biocontrol Science
https://www.readbyqxmd.com/read/28003630/in-vitro-evaluation-of-the-biocompatibility-of-newly-synthesized-bis-quaternary-ammonium-compounds-with-spacer-structures-derived-from-pentaerythritol-or-hydroquinone
#13
Masashi Yamamoto, Takashi Takami, Reiko Matsumura, Alexander Dorofeev, Yoshihiko Hirata, Hideaki Nagamune
 With the object of developing new biocides milder for human use than the current antiseptics, we synthesized a series of bis-quaternary ammonium compounds (bis-QACs). The antimicrobial activity of the newly synthesized bis-QACs and common biocides used as antiseptics was compared by examining minimum inhibitory concentrations and minimum bactericidal concentrations (MBCs). Moreover, the cytotoxicity of these compounds against human cells was determined to calculate the biocompatibility index (BI) of these compounds...
2016: Biocontrol Science
https://www.readbyqxmd.com/read/28003629/bacterial-contamination-into-ready-to-eat-foods-sold-in-middle-thailand
#14
Chiraporn Ananchaipattana, Md Latiful Bari, Yasuhiro Inatsu
 Bacterial contamination in ready-to-eat (RTE) foods prepared and sold by small businesses in middle Thailand was surveyed. The 135 samples were randomly purchased from open markets and supermarkets in Bangkok and Pathum Thani provinces during May 2013 to February 2015. The results indicated that the rate of contamination in cooked pork, chicken meat and cooked aquatic items were 13/39 (33%), 18/45 (40%) and 14/57 (25%), respectively and the rate of bacterial contamination of collected samples from open market and supermarket were 26/67 (39%) and 19/68 (27%), respectively...
2016: Biocontrol Science
https://www.readbyqxmd.com/read/28003628/prediction-of-competitive-microbial-growth
#15
REVIEW
Hiroshi Fujikawa
 Prediction of competitive microbial growth is becoming important for microbial food safety. There would be two approaches to predict competitive microbial growth with mathematical models. The first approach is the development of a growth model for competitive microbes. Among several candidates for the competition model considered, the combination of the primary growth model of the new logistic (NL) model and the competition model of the Lotka-Vorttera (LV) model showed the best performance in predicting microbial competitive growth in the mixed culture of two species...
2016: Biocontrol Science
https://www.readbyqxmd.com/read/28003627/validation-study-and-quality-assurance-of-pharmaceutical-water-waterborne-microorganisms-and-endotoxins
#16
REVIEW
Hideharu Shintani
 Water for injection (WFI) and purified water are the most widely used and stringently regulated raw material in pharmaceutical manufacturing. WFI is utilized for a parenteral drug product. Water system is monitored at frequent and routine frequency for demonstrating the overall system control and stability of performance. The critical ports demonstrating systemic control should be monitored more frequently. For reducing the overall risk of microbial contamination or microbial build-up, it is important to develop appropriate alert and action levels...
2016: Biocontrol Science
https://www.readbyqxmd.com/read/28003626/methods-of-rapid-microbiological-assay-and-their-application-to-pharmaceutical-and-medical-device-fabrication
#17
REVIEW
Hideharu Shintani
 There are several rapid microbiological methods becoming available that have useful applications in pharmaceutical and medical devices. They are ATP bioluminescence, fluorescent labeling, electrical resistance, and nucleic acid probes. In choosing to employ rapid methods, the microbiologist should examine their prospective performances against the specific requirements for that sector. Some methods may require expensive equipment and offer full automation, and others represent only a small investment. The regulatory view of these methods is changing and they still officially have not been approved in medical and pharmaceutical area, but it will still be up to the microbiologist to demonstrate that the method chosen is fit for the purpose intended...
2016: Biocontrol Science
https://www.readbyqxmd.com/read/27667525/bactericidal-action-of-photodynamic-antimicrobial-chemotherapy-pact-with-photosensitizers-used-as-plaque-disclosing-agents-against-experimental-biofilm
#18
Kirika Ishiyama, Keisuke Nakamura, Taro Kanno, Yoshimi Niwano
Our previous study revealed that the photo-irradiation of rose bengal, erythrosine, and phloxine, xanthene photosensitizers, used as dental plaque disclosing agents, could exert bactericidal action on planktonic Streptococcus mutans via the singlet oxygen. In the present study, the photo-irradiation induced bactericidal activity of the three xanthene compounds against the experimental biofilm of S. mutans was investigated in combination with acid electrolyzed water (AcEW) and alkaline electrolyzed water (AlEW)...
2016: Biocontrol Science
https://www.readbyqxmd.com/read/27667524/similarity-in-the-structure-of-tetd-carrying-mobile-genetic-elements-in-bacterial-strains-of-different-genera-isolated-from-cultured-yellowtail
#19
Manabu Furushita, Hiroshi Akagi, Azusa Kaneoka, Toshimichi Maeda, Tsubasa Fukuda, Ryohei Tatsuno, Tsuneo Shiba
Structure analysis was performed on the antibiotic-resistance-gene region of conjugative plasmids of four fish farm bacteria.The kanamycin resistance gene, IS26, and tetracycline resistance gene (tetA(D)) were flanked by two IS26s in opposite orientation in Citrobacter sp. TA3 and TA6, and Alteromonas sp. TA55 from fish farm A. IS26-Inner was disrupted with ISRSB101. The chloramphenicol resistance gene, IS26 and tetA (D) were flanked by two IS26s in direct orientation in Salmonella sp. TC67 from farm C. Structures of tetA (D) and IS26 were identical among the four bacteria, but there was no insertion within the IS26-Inner of Salmonella sp...
2016: Biocontrol Science
https://www.readbyqxmd.com/read/27667523/roles-of-catalase-and-trehalose-in-the-protection-from-hydrogen-peroxide-toxicity-in-saccharomyces-cerevisiae
#20
Takuto Nishimoto, Takeru Watanabe, Masakazu Furuta, Michihiko Kataoka, Masao Kishida
The roles of catalase and trehalose in Saccharomyces cerevisiae subject to hydrogen peroxide (H2O2) treatment were examined by measuring the catalase activity and intracellular trehalose levels in mutants lacking catalase or trehalose synthetase. Intracellular trehalose was elevated but the survival rate after H2O2 treatment remained low in mutants with deletion of the Catalase T gene. On the other hand, deletion of the trehalose synthetase gene increased the catalase activity in mutated yeast to levels higher than those in the wild-type strain, and these mutants exhibited some degree of tolerance to H2O2 treatment...
2016: Biocontrol Science
journal
journal
32823
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"