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https://www.readbyqxmd.com/read/29786635/mechanical-behavior-optimization-of-chitosan-extracted-from-shrimp-shells-as-a-sustainable-material-for-shopping-bags
#1
Giacomo D'Angelo, Amal Elhussieny, Marwa Faisal, I S Fahim, Nicola M Everitt
The use of biodegradable materials for shopping bag production, and other products made from plastics, has recently been an object of intense research-with the aim of reducing the environmental burdens given by conventional materials. Chitosan is a potential material because of its biocompatibility, degradability, and non-toxicity. It is a semi-natural biopolymeric material produced by the deacetylation of chitin, which is the second most abundant natural biopolymer (after cellulose). Chitin is found in the exoskeleton of insects, marine crustaceans, and the cell walls of certain fungi and algae...
May 22, 2018: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/29786601/heterogeneous-photocatalysis-and-its-potential-applications-in-water-and-wastewater-treatment-a-review
#2
Syed N Ahmed, Waseem Haider
There has been a considerable amount of research in the development of sustainable water treatment techniques capable of improving the quality of water. Unavailability of drinkable water is a crucial issue especially in regions where conventional drinking water treatment systems fail to eradicate aquatic pathogens, toxic metal ions and industrial waste. The research and development in this area have given rise to a new class of processes called Advanced Oxidation Processes, particularly in the form of heterogeneous photocatalysis, which converts photon energy into chemical energy...
May 22, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29786180/-bartter-syndrome-severe-rare-orphan-kidney-disease-a-step-towards-therapy-through-pharmacogenetic-and-epidemiological-studies
#3
EDITORIAL
Elena Conte, Paola Imbrici, Dalila Sahbani, Antonella Liantonio, Diana Conte
Bartter syndromes (BS) types 1-5 are rare salt-losing tubulopathies presenting with overlapping clinical phenotypes including marked salt wasting and hypokalemia leading to polyuria, polydipsia, volume contraction, muscle weakness and growth retardation. These diseases are due to an impairment of sodium, potassium, chloride reabsorption caused by mutations in genes encoding for ion channel or transporters expressed in specific nephron tubule segments. Particularly, BS type 3 is a clinically heterogeneous form caused by mutations in CLCNKB gene which encodes the ClC-Kb chloride channel involved in NaCl reabsorption in the renal tubule...
May 2018: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/29785594/attitudes-and-behaviour-towards-construction-waste-minimisation-a-comparative-analysis-between-china-and-the-usa
#4
Jingkuang Liu, Enqin Gong, Dong Wang, XiaoHong Lai, Jian Zhu
With the spread of the concept of sustainable development, people have gained awareness about the problem of massive illegal dumping of construction waste. In this research, a questionnaire survey was carried out in the USA and China. The results indicated the following. (1) Workers in both the countries had positive minimisation attitudes, and the attitude of Chinese construction workers was not significantly different from that of American construction workers. Furthermore, their average values were 3.9 and 4...
May 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29784981/human-activities-might-influence-oncogenic-processes-in-wild-animal-populations
#5
REVIEW
Mathieu Giraudeau, Tuul Sepp, Beata Ujvari, Paul W Ewald, Frédéric Thomas
Based on the abundant studies available on humans showing clear associations between rapid environmental changes and the rate of neoplasia, we propose that human activities might increase cancer rate in wild populations through numerous processes. Most of the research on this topic has concentrated on wildlife cancer prevalence in environments that are heavily contaminated with anthropogenic chemicals. Here, we propose that human activities might also increase cancer rate in wild populations through additional processes including light pollution, accidental (for example, human waste) or intentional (for example, bird feeders) wildlife feeding (and the associated change of diet), or reduction of genetic diversity in human-impacted habitats...
May 21, 2018: Nature Ecology & Evolution
https://www.readbyqxmd.com/read/29783644/a-model-for-remote-depth-estimation-of-buried-radioactive-wastes-using-cdznte-detector
#6
Ikechukwu Kevin Ukaegbu, Kelum A A Gamage
This paper presents the results of an attenuation model for remote depth estimation of buried radioactive wastes using a Cadmium Zinc Telluride (CZT) detector. Previous research using an organic liquid scintillator detector system showed that the model is able to estimate the depth of a 329-kBq Cs-137 radioactive source buried up to 12 cm in sand with an average count rate of 100 cps. The results presented in this paper showed that the use of the CZT detector extended the maximum detectable depth of the same radioactive source to 18 cm in sand with a significantly lower average count rate of 14 cps...
May 18, 2018: Sensors
https://www.readbyqxmd.com/read/29782996/reducing-waste-in-evaluation-studies-on-fall-risk-assessment-tools-for-older-people
#7
Gabriele Meyer, Ralph Möhler, Sascha Köpke
OBJECTIVE: To critically appraise the recognition of methodological challenges in evaluation studies on assessment tools and nurses' clinical judgement on fall risk in older people and suggest how to reduce respective research waste. STUDY DESIGN: Opinion paper and narrative review covering systematic reviews on studies assessing diagnostic accuracy and impact of assessment tools and/or nurses' clinical judgement. RESULTS: Eighteen reviews published in the last 15 years were analysed...
May 18, 2018: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/29781403/life-cycle-cost-as-basis-to-optimize-waste-collection-in-space-and-time-a-methodology-for-obtaining-a-detailed-cost-breakdown-structure
#8
Vitor Sousa, Celia Dias-Ferreira, João M Vaz, Inês Meireles
Extensive research has been carried out on waste collection costs mainly to differentiate costs of distinct waste streams and spatial optimization of waste collection services (e.g. routes, number, and location of waste facilities). However, waste collection managers also face the challenge of optimizing assets in time, for instance deciding when to replace and how to maintain, or which technological solution to adopt. These issues require a more detailed knowledge about the waste collection services' cost breakdown structure...
May 1, 2018: Waste Management & Research
https://www.readbyqxmd.com/read/29779698/patients-with-concurrent-tuberculosis-and-diabetes-have-a-pro-atherogenic-plasma-lipid-profile
#9
Frank Vrieling, Katharina Ronacher, Léanie Kleynhans, Erik van den Akker, Gerhard Walzl, Tom H M Ottenhoff, Simone A Joosten
BACKGROUND: Type 2 diabetes mellitus (DM) is a major risk factor for development of tuberculosis (TB), however the underlying molecular foundations are unclear. Since lipids play a central role in the development of both DM and TB, lipid metabolism may be important for TB-DM pathophysiology. METHODS: A 1 H NMR spectroscopy-based platform was used to determine 225 lipid and other metabolic intermediates in plasma samples of healthy controls (n = 50) and patients with TB (n = 50), DM (n = 50) or TB-DM (n = 27)...
May 17, 2018: EBioMedicine
https://www.readbyqxmd.com/read/29778405/anaerobic-co-digestion-of-different-wastes-in-a-uasb-reactor
#10
Khushboo Kumari, S Suresh, S Arisutha, K Sudhakar
Anaerobic co-digestion has made a greater impact on the biogas production from mixing different type of waste. In this research, sewage sludge (SS) and cow manure (CM), was used as a primary waste along with kitchen waste (KW), yard waste (YW), floral waste (FW) and dairy wastewater (DWW) as co-substrate for anaerobic digestion. Mixtures with a ratio of 1:2 ratio is fed into a single stage up-flow anaerobic sludge blanket (UASB) reactor. Digestion was carried out in a mesophilic temperature range for 20 days...
May 16, 2018: Waste Management
https://www.readbyqxmd.com/read/29778346/energy-performance-evaluation-of-ultrasonic-pretreatment-of-organic-solid-waste-in-a-pilot-scale-digester
#11
Mazdak Rasapoor, Mehrdad Adl, Saeid Baroutian, Zeynab Iranshahi, Mohammad Pazouki
It has been proven that ultrasonic pretreatment (UP) has positive effect on biogas generation from previous lab-scale studies. However, that is not always the case in larger scale processes. The purpose of this study was to evaluate the effectiveness of UP to biogas generation in terms of anaerobic digestion process and energy efficiency. Parameters including total solids (TS) and ultrasonic treatment operational parameters of organic solid waste (OSW) resulted from our past lab scale UP studies were applied in this study...
April 30, 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29775099/the-use-of-olive-tree-pruning-waste-compost-to-sequestrate-methylene-blue-dye-from-aqueous-solution
#12
Ioannis Anastopoulos, Ilias Margiotoudis, Ioannis Massas
Considering that quality water supplies are diminishing and climate disorder affects water cycle, wastewaters should be decontaminated for reuse either by the same establishment or in agriculture for the growth of industrial plants. In that context, much research work has been focused on the development of low cost biosorbents. In this study, the effect of composting on the adsorption capacity of olive tree pruning waste (OTPW) biomass for methylene blue (MB) removal from aqueous solutions was examined. Composting procedure may improve the sorption properties of the raw organic materials, is economical and easy to apply...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29773376/converting-untreated-waste-office-paper-and-chitosan-into-aerogel-adsorbent-for-the-removal-of-heavy-metal-ions
#13
Zhanying Li, Lin Shao, Zehai Ruan, Wenbin Hu, Lingbin Lu, Yongjun Chen
The utilization of waste paper, an obsolete recyclable resource, helps to save resources and protect environment. In this paper, an aerogel was prepared to convert the waste paper into a useful material, which was used to adsorb heavy metal ions and handle water pollution. Combining waste office paper and chitosan, the aerogel obtained the enhanced mechanical strength, acid resistance and high adsorption capacity (up to 156.3 mg/g for Cu2+ ). This adsorption process obeyed the pseudo-second order model and the Langmuir model...
August 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29772730/at-the-crossroads-of-clinical-and-preclinical-research-for-muscular-dystrophy-are-we-closer-to-effective-treatment-for-patients
#14
REVIEW
Kinga I Gawlik
Among diseases affecting skeletal muscle, muscular dystrophy is one of the most devastating and complex disorders. The term 'muscular dystrophy' refers to a heterogeneous group of genetic diseases associated with a primary muscle defect that leads to progressive muscle wasting and consequent loss of muscle function. Muscular dystrophies are accompanied by numerous clinical complications and abnormalities in other tissues that cause extreme discomfort in everyday life. The fact that muscular dystrophy often takes its toll on babies and small children, and that many patients die at a young age, adds to the cruel character of the disease...
May 16, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29770051/agriculture-and-agri-food-canada-s-research-program-on-antimicrobial-resistance
#15
E Topp
A key strategy for attenuating the development of antimicrobial resistance (AMR) is ensuring judicious use of antimicrobials in human and veterinary medicine and in agriculture. Research on AMR in agriculture includes risk assessment, risk management, and identifying the role of agricultural practices in development of AMR. Risk assessment includes an impact assessment of antimicrobial use in livestock and on the environment; for example, many antimicrobials are excreted unchanged and thus reach the environment through manure application...
November 2, 2017: Canada Communicable Disease Report, Relevé des Maladies Transmissibles Au Canada
https://www.readbyqxmd.com/read/29767102/methodological-aspects-of-determining-phosphorus-digestibility-in-swine-a-review
#16
REVIEW
Yue She, Defa Li, Shuai Zhang
The role of phosphorus (P) in swine nutrition has been taken on new significance in recent years. Methods to determine the available phosphorus (AP) content of swine feeds include relative bioavailability (RBV), apparent total tract digestibility (ATTD), standardized total tract digestibility (STTD), and true total tract digestibility (TTTD). The RBV of P is determined by measuring bone ash or bone P, whereas the ATTD of P is determined by calculating the difference between P intake and P excretion in feces...
June 2017: Animal nutrition
https://www.readbyqxmd.com/read/29764443/adrian-grant-s-pioneering-use-of-evidence-synthesis-in-perinatal-medicine-1980-1992
#17
EDITORIAL
Iain Chalmers
Systematic reviews of existing research are needed to help reduce the enormous amount of wasted resources in biomedical research. Whether already available or needed but unavailable, systematic reviews are a key element in prioritising questions for new research, and for informing the design of additional studies. One of the most important of Adrian Grant's many contributions was to recognise this a decade before it began to become more widely accepted. In this sphere, as well as in many others, he was a real pioneer...
May 15, 2018: Reproductive Health
https://www.readbyqxmd.com/read/29763792/impact-assessment-of-pollutants-from-waste-related-operations-as-a-feature-of-holistic-logistic-tool
#18
Vlastimír Nevrlý, Radovan Šomplák, Jiří Gregor, Martin Pavlas, Jiří Jaromír Klemeš
Waste management has still been a developing and progressing field, which demands continual improvements in waste transportation as well as proper selection of locations and technical operation of new treatment facilities. Most of research papers on waste management planning have been dealing with optimisation of network flows, thus minimising the cost and improving economic criteria. The shortest paths to treatment facilities are considered together with detailed analysis of their operation including heat and electricity demands in their vicinity...
May 12, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29762533/self-healing-capacity-of-asphalt-mixtures-including-by-products-both-as-aggregates-and-heating-inductors
#19
Marta Vila-Cortavitarte, Daniel Jato-Espino, Daniel Castro-Fresno, Miguel Á Calzada-Pérez
Major advances have been achieved in the field of self-healing by magnetic induction in which the addition of metallic particles into asphalt mixtures enables repairing their own cracks. This technology has already been proven to increase the life expectancy of roads. Nevertheless, its higher costs in comparison with conventional maintenance caused by the price of virgin metallic particles still makes it unattractive for investment. This research aimed at making this process economically accessible as well as environmentally efficient...
May 15, 2018: Materials
https://www.readbyqxmd.com/read/29757913/association-between-muscle-wasting-and-muscle-strength-in-patients-who-developed-severe-sepsis-and-septic-shock
#20
Rodrigo Cerqueira Borges, Francisco Garcia Soriano
PURPOSE: To evaluate the association between the rectus femoris cross-sectional area (RFCSA) and the muscular strength obtained at the bedside in patients forwarded to the intensive care unit (ICU) for severe sepsis and septic shock. METHODS: A prospective cohort study. RFCSA was assessed by ultrasound on the following day of the ICU admission and monitored during hospitalization. The patients performed clinical tests of muscle strength (Medical Research Council (MRC) scale and handgrip dynamometry), when they could understand the verbal commands of the examiners...
May 11, 2018: Shock
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