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https://www.readbyqxmd.com/read/29040848/responses-of-microbial-community-to-ph-stress-in-bioleaching-of-low-grade-copper-sulfide
#1
Yuguang Wang, Kai Li, Xinhua Chen, Hongbo Zhou
The microbial diversity and dynamics in the leachates and on the ore surfaces of different depth of the column were analyzed during bioleaching of low grade copper sulfide at different pH, after inoculation with the same inoculum containing mesophiles and moderate thermophiles. The results indicate that low pH was beneficial to enhance copper extraction. The highest copper extraction (86%) was obtained when pH was controlled at 1.0-1.5. The microbial structures on the ore surfaces were independent of community structures in the leachate, even at the top portion of column...
October 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28993894/the-association-of-lumbar-intervertebral-disc-calcification-on-plain-radiographs-with-the-ute-disc-sign-on-mri
#2
Uruj Zehra, Cora Bow, Jason Pui Yin Cheung, Henry Pang, William Lu, Dino Samartzis
PURPOSE: The pathogenesis and the clinical impact of disc calcification are not well known. Utilizing ultra-short time-to-echo (UTE) magnetic resonance imaging, the UTE Disc Sign (UDS) (i.e., hypo/hyper-intense disc band) was developed and found to be more significantly related to pain and disability than the conventional T2-weighted (T2W) MRI. It has been hypothesized that the UDS may represent mineralized deposits in the disc. The following study addressed the relationship between disc calcification on plain radiographs to that of the UDS on MRI...
October 9, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28992013/effect-of-trace-mineral-source-on-mineral-status-and-performance-of-beef-steers-fed-low-or-high-sulfur-diets
#3
S J Hartman, O N Genther-Schroeder, S L Hansen
A 2 × 2 factorial assessed the effect of trace mineral (TM) sources fed within low- or high-S diets on the mineral status and performance of cattle. Angus crossbred steers ( = 48; 6/pen) were blocked by BW (316 ± 16.6 kg), assigned to low-S (0.27%; LS) or high-S (0.54%; HS; added as CaSO) diets, and supplemented TM at 10 mg Cu, 30 mg Zn, and 20 mg Mn/kg DM from hydroxy (HYD; IntelliBond; Micronutrients USA LLC, Indianapolis, IN) or inorganic (sulfates; ING) sources ( = 12 steers/treatment). Steers were fed corn silage and corn-based diets via GrowSafe bunks in the growing period (GP; 84 d) and finishing period (FP; 77 d), respectively...
September 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28991996/effect-of-trace-mineral-source-on-mineral-status-and-performance-of-beef-steers-fed-low-or-high-sulfur-diets
#4
S J Hartman, O N Genther-Schroeder, S L Hansen
A 2 × 2 factorial assessed the effect of trace mineral (TM) sources fed within low- or high-S diets on the mineral status and performance of cattle. Angus crossbred steers ( = 48; 6/pen) were blocked by BW (316 ± 16.6 kg), assigned to low-S (0.27%; LS) or high-S (0.54%; HS; added as CaSO) diets, and supplemented TM at 10 mg Cu, 30 mg Zn, and 20 mg Mn/kg DM from hydroxy (HYD; IntelliBond; Micronutrients USA LLC, Indianapolis, IN) or inorganic (sulfates; ING) sources ( = 12 steers/treatment). Steers were fed corn silage and corn-based diets via GrowSafe bunks in the growing period (GP; 84 d) and finishing period (FP; 77 d), respectively...
September 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28974267/efficacy-of-a-multi-component-exercise-programme-and-nutritional-supplementation-on-musculoskeletal-health-in-men-treated-with-androgen-deprivation-therapy-for-prostate-cancer-impact-study-protocol-of-a-randomised-controlled-trial
#5
Patrick J Owen, Robin M Daly, Patricia M Livingston, Niamh L Mundell, Jack Dalla Via, Jeremy L Millar, Steve F Fraser
BACKGROUND: Prostate cancer is the most commonly diagnosed cancer in men in developed countries. Androgen deprivation therapy (ADT) is a systemic treatment shown to increase survival in selected patients with prostate cancer. The use of ADT continues to increase for all stages and grades of prostate cancer despite known treatment-induced adverse effects. The primary aim of this study is to examine the efficacy of a targeted, multi-component resistance and impact-loading exercise programme together with a daily protein-, calcium- and vitamin D-enriched supplement on bone health in men treated with ADT for prostate cancer...
October 3, 2017: Trials
https://www.readbyqxmd.com/read/28965188/association-of-bone-mineral-density-bone-turnover-markers-and-vertebral-fractures-with-all-cause-mortality-in-type-2-diabetes-mellitus
#6
Hitomi Miyake, Ippei Kanazawa, Toshitsugu Sugimoto
Patients with type 2 diabetes mellitus (T2DM) have an increased risk of fragility fracture. However, the association between diabetes-related osteoporosis and mortality in T2DM remains unknown. This historical cohort study assessed the endpoint of all-cause mortality in patients with T2DM. According to our hospital record, bone parameters were examined in 797 patients from 1997 to 2009. We excluded 78 because of diseases affecting bone metabolism and could not follow-up 308 patients. Finally, in 411 patients, the associations of bone turnover markers, bone mineral density (BMD), and the prevalence of vertebral fractures with mortality were investigated by Cox regression analyses adjusted for confounding factors...
September 30, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28943206/kaolinite-in-pharmaceutics-and-biomedicine
#7
REVIEW
Mahmoud E Awad, Alberto López-Galindo, Massimo Setti, Mahmoud M El-Rahmany, César Viseras Iborra
Kaolinite Al2Si2O5(OH)4 is an abundant and inexpensive geomaterial regarded as one of the most common clay minerals in the earth's crust and the most widespread phase among the other kaolin polymorphs (halloysite, dickite and nacrite). Structurally, it is a hydrous aluminum phyllosilicate member belonging to the dioctahedral 1:1 kaolin mineral group. The particle size of the pseudohexagonal kaolinite platelets is normally <2μm (if compared to a human red blood cell of a typical diameter 6.2-8.2μm or to a virus particle of about 50nm diameter)...
September 22, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28933129/-analysis-of-color-regulation-of-fluoritum-in-chinese-pharmacopoeia-based-on-the-coloration-mechanism-of-fluorite
#8
Ting Han, Zhe Jia, Hui Zhang, Huan Liu, Yan Gao, Ying Zhang, Qing-Hua Lin, Shu-Ya Xu, Xin-Fang Xu, Xiang-Ri Li
The fluoritum is used for gynecology frequently and it's for those diseases: kidney yang deficiency, Gong cold sterility, palpitation due to fright, insomnia and dreaminess and cold cough. It's ruled in Chinese Pharmacopoeia (1985 edition) that the fluoritum originates from fluorite which belongs to fluoride minerals. Its main content is CaF2. The colors are of differents grades with purple or green. In the market, there are large differences in quality and it has various colors. Besides of the ruled color of purple and green, white and yellow are also common colors...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28915028/acid-rock-drainage-treatment-using-membrane-distillation-impacts-of-chemical-free-pretreatment-on-scale-formation-pore-wetting-and-product-water-quality
#9
Eric J Hull, Katherine R Zodrow
Acid rock drainage (ARD) is a metal-rich wastewater that forms upon oxidation of sulfidic minerals. Although ARD impacts >12,000 miles of rivers in the U.S. and has an estimated cleanup cost of $32-$72 billion, the low pH and high metal concentrations in ARD make rapid, high volume treatment without chemical addition difficult. This research focuses on a novel method of ARD treatment, membrane distillation (MD). In MD, heated ARD is separated from a cooled distillate by a hydrophobic, water-excluding membrane...
October 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28910143/the-lost-city-hydrothermal-field-a-spectroscopic-and-astrobiological-analogue-for-nili-fossae-mars
#10
Elena S Amador, Joshua L Bandfield, William J Brazelton, Deborah Kelley
Low-temperature serpentinization is a critical process with respect to Earth's habitability and the Solar System. Exothermic serpentinization reactions commonly produce hydrogen as a direct by-product and typically produce short-chained organic compounds indirectly. Here, we present the spectral and mineralogical variability in rocks from the serpentine-driven Lost City Hydrothermal Field on Earth and the olivine-rich region of Nili Fossae on Mars. Near- and thermal-infrared spectral measurements were made from a suite of Lost City rocks at wavelengths similar to those for instruments collecting measurements of the martian surface...
September 14, 2017: Astrobiology
https://www.readbyqxmd.com/read/28902106/fine-tuning-the-predictive-model-for-proximal-junctional-failure-in-surgically-treated-patients-with-adult-spinal-deformity
#11
Mitsuru Yagi, Nobuyuki Fujita, Eijiro Okada, Osahiko Tsuji, Narihito Nagoshi, Takashi Asazuma, Ken Ishii, Masaya Nakamura, Morio Matsumoto, Kota Watanabe
STUDY DESIGN: Multi-center retrospective study. OBJECTIVE: To validate and improve the predictive model for proximal junctional failure (PJF) with or without the bone mineral density (BMD) score. SUMMARY OF BACKGROUND DATA: PJF is a serious complication of surgery for adult spinal deformity (ADS). A predictive model for PJF was recently reported that has good accuracy, but does not include BMD, a known PJF risk factor, as a variable. METHODS: We included 145 surgically treated ASD patients who were older than 50 at the time of surgery and had been followed up for at least 2 years...
September 8, 2017: Spine
https://www.readbyqxmd.com/read/28891704/mucoepidermoid-carcinoma-in-the-skull-of-an-orange-winged-amazon-parrot-amazona-amazonica
#12
Melissa R Nau, James W Carpenter, Denise Lin, Sanjeev Narayanan, Mackenzie Hallman
A 33-year-old female intact orange-winged Amazon parrot (Amazona amazonica) presented for a slowly growing mass over the right eye. A computed tomography scan performed with and without intravenous contrast revealed a heterogeneous mixed soft tissue and mineral-dense mass with a small area of non-contrast-enhancing fluid density located between the orbits at the caudal aspect of the nasal passages, with associated lysis of the right caudal nasal passage and the right frontal bone. Following euthanasia, the mass was found to consist of soft tissue between the right eye and nostril over the right frontal bone...
September 2017: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/28880398/association-of-incident-clinically-undiagnosed-radiographic-vertebral-fractures-with-follow-up-back-pain-symptoms-in-older-men-the-osteoporotic-fractures-in-men-mros-study
#13
Howard A Fink, Stephanie Litwack-Harrison, Kristine E Ensrud, Jian Shen, John T Schousboe, Peggy M Cawthon, Jane A Cauley, Nancy E Lane, Brent C Taylor, Elizabeth Barrett-Connor, Deborah M Kado, Steven R Cummings, Lynn M Marshall
Prior data in women suggest that incident clinically undiagnosed radiographic vertebral fractures (VFs) often are symptomatic, but misclassification of incident clinical VF may have biased these estimates. There are no comparable data in men. To evaluate the association of incident clinically undiagnosed radiographic VF with back pain symptoms and associated activity limitations, we used data from the Osteoporotic Fractures in Men (MrOS) Study, a prospective cohort study of community-dwelling men aged ≥65 years...
September 7, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28874843/multiple-mining-impacts-induce-widespread-changes-in-ecosystem-dynamics-in-a-boreal-lake
#14
Jaakko Johannes Leppänen, Jan Weckström, Atte Korhola
In order to satisfy the needs of constant economic growth, the pressure to exploit natural resources has increased. Since accessible mineral resources are becoming scarce, the mining industry is constantly looking for novel techniques to allow commercial exploitation of lower-grade deposits. However, mining can have considerable impacts on freshwater ecosystems. Here, we present the ecological damage inflicted by mine water originating from the massive Terrafame Talvivaara polymetal mine (central Finland), where bioheap leaching is being applied to high-sulphur low-grade ore...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28873971/clinical-practice-recommendations-for-treatment-with-active-vitamin-d-analogues-in-children-with-chronic-kidney-disease-stages-2-5-and-on-dialysis
#15
Rukshana Shroff, Mandy Wan, Evi V Nagler, Sevcan Bakkaloglu, Mario Cozzolino, Justine Bacchetta, Alberto Edefonti, Constantinos J Stefanidis, Johan Vande Walle, Gema Ariceta, Günter Klaus, Dieter Haffner, Claus Peter Schmitt
In patients with chronic kidney disease (CKD), renal synthesis of active vitamin D [1,25-dihydroxyvitamin D (1,25(OH)2D)] declines and is associated with hypocalcaemia, secondary hyperparathyroidism and the spectrum of CKD-mineral and bone disorder (MBD). In advanced CKD, active vitamin D analogues, including alfacalcidol, calcitriol and paricalcitol, are routinely administered. There are few studies on the use of vitamin D analogues in children with CKD and on dialysis. It is difficult to define bone-specific outcomes that can guide treatment with active vitamin D analogues in children with CKD-MBD...
July 1, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28873969/clinical-practice-recommendations-for-native-vitamin-d-therapy-in-children-with-chronic-kidney-disease-stages-2-5-and-on-dialysis
#16
Rukshana Shroff, Mandy Wan, Evi V Nagler, Sevcan Bakkaloglu, Dagmar-C Fischer, Nicholas Bishop, Mario Cozzolino, Justine Bacchetta, Alberto Edefonti, Constantinos J Stefanidis, Johan Vande Walle, Dieter Haffner, Günter Klaus, Claus Peter Schmitt
Vitamin D deficiency is widely prevalent and often severe in children and adults with chronic kidney disease (CKD). Although native vitamin D {25-hydroxyvitamin D [25(OH)D]} is thought to have pleiotropic effects on many organ systems, its skeletal effects have been most widely studied. The 25(OH)D deficiency is causally linked with rickets and fractures in healthy children and those with CKD, contributing to the CKD-mineral and bone disorder (MBD) complex. There are few studies to provide evidence for vitamin D therapy or guidelines for its use in CKD...
July 1, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28866161/a-graded-graphene-oxide-hydroxyapatite-silk-fibroin-biomimetic-scaffold-for-bone-tissue-engineering
#17
Qian Wang, Yanyan Chu, Jianxin He, Weili Shao, Yuman Zhou, Kun Qi, Lidan Wang, Shizhong Cui
To better mimic natural bone, a graphene oxide-hydroxyapatite/silk fibroin (cGO-HA/SF) scaffold was fabricated by biomineralizing carboxylated GO sheets, blending with SF, and freeze-drying. The material has increasing porosity and decreasing density from outside to inside. Analysis of GO mineralization in simulated body fluid indicated that carboxylation and Chitosan may synergistically regulate HA growth along the c-axis of weakly crystalline, rod-like GO-HA particles. Compared with HA/SF gradient composites, a cGO-HA gradient scaffold with cGO:HA mass ratio 1:4 has 5-fold and 2...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28851521/incidence-of-bone-protection-and-associated-fragility-injuries-in-patients-with-proximal-femur-fractures
#18
Ignacio Aguado-Maestro, Michalis Panteli, Manuel García-Alonso, Alejandro Bañuelos-Díaz, Peter V Giannoudis
OBJECTIVES: Our aim was to investigate whether patients presenting with fragility fractures of the proximal femur are receiving osteoporosis treatment and to assess the number of other fragility fractures they have sustained prior to admission. METHODS: All patients presenting to our institution with fragility fractures of the proximal femur within an 18-month period (January 2012-August 2013) were included. Patient demographics; fracture classification (AO/OTA); American Society of Anesthesiologists (ASA) grade; Abbreviated Mental Test Score (AMTS) on admission; type of operation; time to operation; peri-operative complications; length of hospital stay (LOS); walking status; osteoporotic medication; Dual-energy X-ray absorptiometry (DEXA) results; additional fragility fractures; and mortality were collected and analysed...
August 26, 2017: Injury
https://www.readbyqxmd.com/read/28840578/bone-mineral-density-is-lower-in-patients-with-severe-knee-osteoarthritis-and-attrition
#19
Karina Nørgaard Linde, Katriina Bøcker Puhakka, Bente Lomholt Langdahl, Kjeld Søballe, Inger Krog-Mikkelsen, Frank Madsen, Maiken Stilling
Bone quality is probably important for the survival of knee arthroplasty (KA), but little is known about systemic bone mineral density and bone turnover in patients prior to KA surgery. The aim of this study was to explore the prevalence of osteoporosis and bone turnover in relation to knee osteoarthritis (OA) grade in patients scheduled for KA surgery. Prospective preoperative evaluation of 450 patients (259 females) prior to KA between 2014 and 2016 with standing knee radiography, Dual-energy X-ray absorptiometry (DXA), biomarkers for bone turnover (CTX, P1NP), and vitamin D...
August 24, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28839483/efficacy-of-panoramic-radiography-in-the-detection-of-osteoporosis-in-post-menopausal-women-when-compared-to-dual-energy-x-ray-absorptiometry
#20
Shambulingappa Pallagatti, Priyanka Parnami, Soheyl Sheikh, Deepak Gupta
OBJECTIVE: It is a well-known fact that osteoporosis affects the people with old age and remains unnoticeable until the patient presents with fracture. Various studies in the literature reveal that panoramic radiographs may prove to be beneficial in the detection of Osteoporosis in patients. Henceforth this present study was aimed to validate the use of Klemetti Index (KI) on panoramic radiographs so as to detect osteoporosis in the patients at an early stage. METHODS: 60 postmenopausal women were selected...
2017: Open Dentistry Journal
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