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Microorganism quality

Dao Ngoc Hien Tam, Duy Hieu Truong, Thi Thanh Hoa Nguyen, Le Nhat Quynh, Linh Tran, Hong Duong Nguyen, Bahaa Eldin Shamandy, Thi Minh Huong Le, Dang Khoa Tran, Dina Sayed, Van Vinh Vu, Shusaku Mizukami, Kenji Hirayama, Nguyen Tien Huy
Ginsenoside Rh1 is one of major bioactive compounds extracted from red ginseng, which has been increasingly used for enhancing cognition and physical health worldwide. The objective of this study was to review the pharmacological effects of ginsenoside Rh1 in a systematic manner. We performed searches on eight electronic databases including MEDLINE (Pubmed), Scopus, Google Scholar, POPLINE, Global Health Library, Virtual Health Library, the System for Information on Grey Literature in Europe, and the New York Academy of Medicine Grey Literature Report to select the original research publications reporting the biological and pharmacological effects of ginsenoside Rh1 from in vitro and in vivo studies regardless of publication language and study design...
January 12, 2018: Planta Medica
(no author information available yet)
Peer review is an essential part in the publication process, ensuring that Microorganisms maintains high quality standards for its published papers [...].
January 12, 2018: Microorganisms
Donald W Schaffner, Dane Jensen, Charles P Gerba, David Shumaker, James W Arbogast
Concern has been raised regarding the public health risks from refillable bulk-soap dispensers because they provide an environment for potentially pathogenic bacteria to grow. This study surveyed the microbial quality of open refillable bulk soap in four different food establishment types in three states. Two hundred ninety-six samples of bulk soap were collected from food service establishments in Arizona, New Jersey, and Ohio. Samples were tested for total heterotrophic viable bacteria, Pseudomonas, coliforms and Escherichia coli, and Salmonella...
January 10, 2018: Journal of Food Protection
S Mingmongkolchai, W Panbangred
The use of probiotics as feed supplements in animal production has increased considerably over the last decade, particularly since the ban on antibiotic growth promoters (AGPs) in the livestock sector. Several Bacillus spp. are attractive for use as probiotic supplements in animal feed due to their ability to produce spores. Their heat stability and ability to survive the low pH of the gastric barrier represent an advantage over other probiotic microorganisms. This review discusses important characteristics required for selection of Bacillus probiotic strains and summarizes the beneficial effect of Bacillus-based feed additives on animal production...
January 9, 2018: Journal of Applied Microbiology
Cong Huang, Wen-Zong Liu, Zhi-Ling Li, Shu-Ming Zhang, Fan Chen, Hua-Rong Yu, Sen-Lin Shao, Jun Nan, Ai-Jie Wang
Elemental sulfur (S0) is always produced during bio-denitrification and desulfurization process, but the S0 yield and purification quality are too low. Till now, no feasible approach has been carried out to efficiently recover S0. In this study, we report the S0 generation and recovery by a newly designed, compact, biofilm formed membrane filtration reactor (BfMFR), where S0 was generated within a Thauera sp. strain HDD-formed biofilm on membrane surface, and then timely separated from the biofilm through membrane filtration...
November 24, 2017: Water Research
Pengkang Jin, Xuan Shi, Guangxi Sun, Lei Yang, Yixiao Cai, Xiaochang C Wang
Distribution characteristics and biodiversity of microbial communities were studied in a 1200-m pilot sewer system. Results showed that the dominant microorganisms, fermentation bacteria (FB), hydrogen-producing acetogen (HPA), sulphate-reducing bacteria (SRB) and methanogenic archaea (MA) changed significantly along the sewer systems, from start to the end. The distribution of the functional microorganisms could induce substrate transformation and lead to the accumulation of micromolecular organics (i.e., acetic acid, propionic acid and amino acid)...
January 4, 2018: Environmental Science & Technology
Paulo Cardoso, Sofia Corticeiro, Rosa Freitas, Etelvina Figueira
Soil contamination with metals is a widespread problem posing risks to humans and ecosystems. Metal contaminated soils often hold poor microbial density and biodiversity. Among soil bacteria, rhizobia have a great agronomic and environmental significance and are major contributors to a sustainable maintenance of soil fertility. This group of microorganisms are severely affected by metals, such as cadmium (Cd), but information about metal resistance mechanisms in rhizobia is still limited. A concerted approach of the different mechanisms conferring Cd tolerance to rhizobia was conducted using two Rhizobium strains with contrasting tolerances to Cd...
December 28, 2017: Ecotoxicology and Environmental Safety
D Lauritano, M Nardone, R M Gaudio, V Candotto, F Carinci
The aerosol produced during the use of dental instruments can spread pathogens potentially harmful to health. Most of the pathogens found in hydraulic system are Gram-negative aerobic heterotrophic environmental bacterial species exhibiting very low pathogenicity, although they may be of concern in the treatment of vulnerable patients, such as immunocompromised, medically compromised individuals and dental team. Dental team can be exposed to pathogenic microorganisms including cytomegalovirus, hepatitis B virus, hepatitis C virus, herpes simplex virus and Legionella spp...
July 2017: Oral & Implantology
Aharon Gedanken, Nina Perkas, Ilana Perelshtein, Anat Lipovsky
The review, reports on the functionalization of textiles for the treatment of wounds and skin diseases such as acne. In view of the growing demand for high-quality textiles, much research is focused on the creation of antimicrobial finishings for fabrics, in order to protect customers from pathogenic or odor-generating microorganisms. We present coatings from inorganic, organic and biochemical nanoparticles (NPs) on surfaces that impart the ability to kill bacteria, avoid biofilm formation and speed up the recovery of wounds...
December 29, 2017: Current Medicinal Chemistry
Katrina Hui, Lydia Upjohn, Michelle Nalder, Kirsty Buising, Eugenie Pedagogos, Craig Nelson, Carl M J Kirkpatrick, David C M Kong
OBJECTIVES: This study aimed to systematically evaluate if non-weight-based (non-WBD) or weight-based dosing (WBD) of vancomycin led to a higher proportion of patients achieving the pharmacokinetic/pharmacodynamic target. METHODS: Studies from January 1985 to February 2017 were identified through Cochrane, MEDLINE and EMBASE databases. Those conducted in adults with end-stage renal disease receiving high-flux haemodialysis and intravenous vancomycin were included...
December 25, 2017: International Journal of Antimicrobial Agents
J Blaya, Z Barzideh, G LaPointe
The microbiota of ripening cheese is dominated by lactic acid bacteria, which are either added as starters and adjunct cultures or originate from the production and processing environments (nonstarter or NSLAB). After curd formation and pressing, starters reach high numbers, but their viability then decreases due to lactose depletion, salt addition, and low pH and temperature. Starter autolysis releases cellular contents, including nutrients and enzymes, into the cheese matrix. During ripening, NSLAB may attain cell densities up to 8 log cfu per g after 3 to 9 mo...
December 20, 2017: Journal of Dairy Science
N Serrano-Silva, M C Calderón-Ezquerro
The identification of airborne bacteria has traditionally been performed by retrieval in culture media, but the bacterial diversity in the air is underestimated using this method because many bacteria are not readily cultured. Advances in DNA sequencing technology have produced a broad knowledge of genomics and metagenomics, which can greatly improve our ability to identify and study the diversity of airborne bacteria. However, researchers are facing several challenges, particularly the efficient retrieval of low-density microorganisms from the air and the lack of standardized protocols for sample collection and processing...
December 20, 2017: Environmental Pollution
Li-Zhen Deng, Arun S Mujumdar, Qian Zhang, Xu-Hai Yang, Jun Wang, Zhi-An Zheng, Zhen-Jiang Gao, Hong-Wei Xiao
Pretreatment is widely used before drying of agro-products to inactivate enzymes, enhance drying process and improve quality of dried products. In current work, the influence of various pretreatments on drying characteristics and quality attributes of fruits and vegetables is summarized. They include chemical solution (hyperosmotic, alkali, sulfite and acid, etc.) and gas (sulfur dioxide, carbon dioxide and ozone) treatments, thermal blanching (hot water, steam, super heated steam impingement, ohmic and microwave heating, etc), and non-thermal process (ultrasound, freezing, pulsed electric field, and high hydrostatic pressure, etc)...
December 20, 2017: Critical Reviews in Food Science and Nutrition
Matthew J Payea, Michael F Sloma, Yoshiko Kon, David L Young, Michael P Guy, Xiaoju Zhang, Thareendra De Zoysa, Stanley Fields, David H Mathews, Eric M Phizicky
Microorganisms have universally adapted their RNAs and proteins to survive at a broad range of temperatures and growth conditions. However, for RNAs, there is little quantitative understanding of the effects of mutations on function at high temperatures. To understand how variant tRNA function is affected by temperature change, we used the nonsense suppressor SUP4oc, of the yeast Saccharomyces cerevisiae to perform a high-throughput quantitative screen of tRNA function at two different growth temperatures. This screen yielded comparative values for 9,243 single and double variants...
December 19, 2017: RNA
Zahra Derakhshan, Gea Oliveri Conti, Ali Heydari, Motahreh Sadat Hosseini, Fateme Akrami Mohajeri, Hamidreza Gheisari, Samane Kargar, Elham Karimi, Margherita Ferrantee
INTRODUCTION: Irradiation is one of the intervention strategies for effective control of food-borne pathogen microorganisms, which reduces microbial load and extends the meat shelf life. MATERIALS AND METHODS: This experimental study was carried out on quail meat. Quail meat samples were treated with electron beam irradiation at doses of 0.5, 1, and 3 kGy and stored at 4 ± 1 °C for 15 days. Five days after irradiation, the chemical and organoleptic changes in the quail meat were evaluated for 15 days...
December 14, 2017: Food and Chemical Toxicology
Suzana Madžarić, Monika Kos, Damjana Drobne, Matej Hočevar, Anita Jemec Kokalj
We investigated how different carbonized materials, or chars (olive mill pomace biochar (BC) and urban greens pruning residues hydrochar (HC)) affect an important member of soil fauna, the terrestrial isopod Porcellio scaber. The selection behavior of isopods towards chars after a 48 h exposure was studied in (i) soil-char amended tests with single and multiple choices, and (ii) tests with chars offered as pure material. Finally, we exposed the isopods to char-amended soils for a period of 14 days to follow the effect on food consumption, body mass and activities of enzymes that are commonly altered upon stressor exposure (acetylcholinesterase, AChE, and glutathione S-transferase, GST)...
December 13, 2017: Environmental Pollution
Kai Peng, Long Jin, Yan D Niu, Qianqian Huang, Tim A McAllister, Hee Eun Yang, Hubert Denise, Zhongjun Xu, Surya Acharya, Shunxi Wang, Yuxi Wang
Purple prairie clover (PPC; Dalea purpurea Vent.) containing 84.5 g/kg DM of condensed tannin (CT) was ensiled without (Control) or with polyethylene glycol (PEG) for 76 days, followed by 14 days of aerobic exposure. Changes in fermentation characteristics were determined and bacterial and fungal communities were assessed using metagenomic sequencing. Addition of PEG that deactivated CT at ensiling increased (P < 0.05∼0.001) soluble N, non-protein N, lactic acid, total volatile fatty acids, ammonia N, deoxynivalenol (DON) and ochratoxin A (OTA), but decreased (P < 0...
December 15, 2017: Applied and Environmental Microbiology
Huan Wang, Yue Zhao, Yuquan Wei, Yi Zhao, Qian Lu, Lina Liu, Nan Jiang, Zimin Wei
Microorganisms can play a crucial role in the efficiency for composting, which are essential for converting the organic wastes into a well-stabilized, value added product. However, the activity of most of the key functional microorganisms were inhibited due to the limited special nutrient substances or other physiochemical factors during composting, which further affected the quality of compost. The study was conducted to investigate the effects of enriched ammonium (NH4+-N) and organic nitrogen (Org-N) on indigenous microbial community and whether nitrogen (N) nutrient additions could modify the special species during composting...
December 11, 2017: Waste Management
Barbara Pliszka
BACKGROUND: The pharmaceutical and food industries expect detailed knowledge on the physicochemical properties of elderberry fruit extracts, their stability and microbiological quality, as well as the polyphenol content in elderberry cultivars. The characteristics of the extracts might be additionally modified by citric acid, which improves the stability of anthocyanins and protects processed fruits and syrups from pathogenic microorganisms. The choice of the method with citric acid was a consequence of the physicochemical charac teristics of elderberry pigments, which are not stable under the effect of light in alcoholic solutions...
October 2017: Acta Scientiarum Polonorum. Technologia Alimentaria
Camille Chiron, Thomas A Tompkins, Pierre Burguière
AIMS: Classical microbiology techniques are the gold standard for probiotic enumeration. However, these techniques are limited by parameters of time, specificity and incapacity to detect viable but non-culturable (VBNC) microorganisms and non-viable cells. The aim of the study was to evaluate flow cytometry as a novel method for the specific quantification of viable and non-viable probiotics in multi-strain products. METHODS AND RESULTS: Custom polyclonal antibodies were produced against five probiotic strains from different species (Bifidobacterium bifidum R0071, Bifidobacterium longum ssp...
December 13, 2017: Journal of Applied Microbiology
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