scholarly journals Gold Extraction from Cyanidation Tailing Using Microwave Chlorination Roasting Method

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1025 ◽  
Author(s):  
Fei Zhu ◽  
Libo Zhang ◽  
Haoyu Li ◽  
Shaohua Yin ◽  
Sivasankar Koppala ◽  
...  
Keyword(s):  
Microwave Field ◽  
High Efficiency ◽  
Chloride Concentration ◽  
Treatment Method ◽  
Gold Extraction ◽  
Microwave Roasting ◽  
Gold Mines ◽  
Chlorination Roasting ◽  
New Treatment ◽  
Gold Industry

At present, gold mines are increasingly scarce in the world. The yield of cyanidation tailing (CT) of refractory gold ores with a grade of 10 g/T is huge; however, the effective capitalization of the cyanidation tailing is a significant problem in the gold industry. In this work, a new treatment method, a microwave-roasting process developed. The effect of roasting temperature, calcium chloride concentration, holding time and mineral size on the recovery of Au researched under conventional and microwave conditions. It found that, under the same processing conditions, the Au recovery in the microwave field is much higher than that of conventional conditions. The preliminary reinforcing role of the microwave discussed in the recovery of gold. This might be because of the microwave absorption ability of CaCl2 is much better, heated quickly and the reactions intensified among CaCl2, O2, and H2O. As a result, the extraction of gold in CT drastically increased in the microwave field, and the microwave roasting technology shows the characteristics of environmental protection in terms of low energy consumption and high efficiency.

scholarly journals Pulp Revascularization of Immature Permanent Teeth: A Review of the Literature and a Proposal of a New Clinical Protocol

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Mélanie Namour ◽  
Stephanie Theys
Keyword(s):  
Treatment Method ◽  
Permanent Teeth ◽  
Clinical Protocol ◽  
Therapeutic Success ◽  
Immature Teeth ◽  
Triple Antibiotic Paste ◽  
New Treatment ◽  
Near Future ◽  
Pulp Revascularization ◽  
Stimulation Of

Tissue engineering is a growing field. In the near future, it will probably be possible to generate a complete vital tooth from a single stem cell. Pulp revascularization is dependent on the ability of residual pulp and apical and periodontal stem cells to differentiate. These cells have the ability to generate a highly vascularized and a conjunctive rich living tissue. This one is able to colonize the available pulp space. Revascularization is a new treatment method for immature necrotic permanent teeth. Up to now, apexification procedures were applied for these teeth, using calcium dihydroxide or MTA to produce an artificial apical barrier. However, the pulp revascularization allows the stimulation of the apical development and the root maturation of immature teeth. Two pulp revascularization techniques are used in the literature, one using calcium dihydroxide and the second using a triple antibiotic paste. Based on these two different pulp revascularization protocols, which obtain the desired therapeutic success, the literature will be reviewed and analyzed according to the relevance of their choice of materials. Based on the literature, we propose a new relevant protocol and a new mixture of antibiotics.

scholarly journals Development of an Immune-Related Gene Signature for Prognosis in Melanoma

2021 ◽  
Vol 10 ◽  
Author(s):  
Jia-An Zhang ◽  
Xu-Yue Zhou ◽  
Dan Huang ◽  
Chao Luan ◽  
Heng Gu ◽  
...  
Keyword(s):  
T Cells ◽  
Immune Cell ◽  
Treatment Method ◽  
Gene Signature ◽  
Cell Infiltration ◽  
Venn Diagram ◽  
Immune Cell Infiltration ◽  
Tumor Purity ◽  
New Treatment ◽  
Immune Related Genes

Melanoma remains a potentially deadly malignant tumor. The incidence of melanoma continues to rise. Immunotherapy has become a new treatment method and is widely used in a variety of tumors. Original melanoma data were downloaded from TCGA. ssGSEA was performed to classify them. GSVA software and the "hclust" package were used to analyze the data. The ESTIMATE algorithm screened DEGs. The edgeR package and Venn diagram identified valid immune-related genes. Univariate, LASSO and multivariate analyses were used to explore the hub genes. The "rms" package established the nomogram and calibrated the curve. Immune infiltration data were obtained from the TIMER database. Compared with that of samples in the high immune cell infiltration cluster, we found that the tumor purity of samples in the low immune cell infiltration cluster was higher. The immune score, ESTIMATE score and stromal score in the low immune cell infiltration cluster were lower. In the high immune cell infiltration cluster, the immune components were more abundant, while the tumor purity was lower. The expression levels of TIGIT, PDCD1, LAG3, HAVCR2, CTLA4 and the HLA family were also higher in the high immune cell infiltration cluster. Survival analysis showed that patients in the high immune cell infiltration cluster had shorter OS than patients in the low immune cell infiltration cluster. IGHV1-18, CXCL11, LTF, and HLA-DQB1 were identified as immune cell infiltration-related DEGs. The prognosis of melanoma was significantly negatively correlated with the infiltration of CD4+ T cells, CD8+ T cells, dendritic cells, neutrophils and macrophages. In this study, we identified immune-related melanoma core genes and relevant immune cell subtypes, which may be used in targeted therapy and immunotherapy of melanoma.

scholarly journals Therapeutic approach to children’s intussusception at late hospitalization

2003 ◽  
Vol 2 (2) ◽  
pp. 72-77
Author(s):  
M. K. Belyaev ◽  
K. K. Fyodorov
Keyword(s):  
Old Age ◽  
Therapeutic Approach ◽  
Pediatric Surgery ◽  
High Efficiency ◽  
Abdominal Cavity ◽  
Treatment Method ◽  
Time Period

The goal of the investigation was to define whether conservative disinvagination would be safe and effective for long children’s intussusception. 368 children of 1 month to 13 years old age with intussusception have been treated in Novokuznetsk’ pediatric surgery clinic for a period from 1976 up to 2001. The number of boys was 248 (67,4%) and girls — 120 (32,6%) respectively. Patients of the age up to 1 year old were 185 (50,3%), older than 1 year — 183 (49,7%). 214 patients (58,2%) were hospitalized during the first 12 hours from the disease began, 71 patients (19,3%) — during 12—24 hours, 48 patients (13%) — during 24—48 hours, 35 patients (9,5%) — after 48 hours. In our clinic the method of conservative intussusception therapy is considered to be the priority and its application, if there are no any abdominal cavity complications (peritonitis), does not depend on introducing form, patients’ age, time period of hospitalization following the disease or recurrence beginning. The bloodless therapy has been found to be effective: the 1th stage — 93,2%, the 2nd stage — 93%, the 3d stage — 86,4% and the 4th stage — 91,7%. Thus, our facts earnestly prove both the potential of bloodless intussusception treatment method for children at late hospitalization (after 24 hours) and its safety and high efficiency (88,3%).

scholarly journals Implantation and Retrieval of Magnetic Nanobots for Treatment of Endodontic Re-Infection in Human Dentine

2021 ◽  
Author(s):  
Debayan Dasgupta ◽  
Shanmukh Srinivas Peddi ◽  
Deepak K. Saini ◽  
Ambarish Ghosh
Keyword(s):  
Root Canal ◽  
Treatment Method ◽  
Therapeutic Modality ◽  
Clinical Practices ◽  
Human Teeth ◽  
Dentinal Tubules ◽  
Current State ◽  
Human Dentine ◽  
New Treatment ◽  
Magnetic Drive

<div> <div> <div> <p>More than 10% of root canal treatments undergo failure worldwide due to remnant bacteria deep in the dentinal tubules located within the dentine tissue of human teeth. Owing to the complex and narrow geometry of the tubules, current techniques relying on passive diffusion of anti-bacterial agents are inadequate. Here, we present a new treatment method using actively maneuvered nanobots, which can be incorporated during standard root canal procedure. Our technique will enable dentists to execute procedures inside the dentine not yet possible by current state of the art. We demonstrate that magnetically driven nanobots can reach the depths of the tubules up to hundred times faster than current clinical practices. Subtle modifications of the magnetic drive allowed deep implantation of the nanobots isotopically distributed throughout the dentine, along with spatially controlled retrieval from selected areas. Finally, we demonstrate the integration of bactericidal therapeutic modality with the nanobots, thereby validating the tremendous potential of nanobots in dentistry, and nanomedicine in general. </p> </div> </div> </div>

Metody leczenia endodontycznego zębów stałych z niezakończonym rozwojem wierzchołków korzenia – rewaskularyzacja, 12-miesięczna obserwacja. Część II

2018 ◽  
Vol 21 (1A) ◽  
Author(s):  
Renata Pazera ◽  
Magdalena Piechota-Urbańska ◽  
Patrycja Proc ◽  
Joanna Szczepańska
Keyword(s):  
Root Length ◽  
Treatment Method ◽  
Modern Method ◽  
Endodontic Treatment ◽  
Permanent Teeth ◽  
Control Group ◽  
Tissue Healing ◽  
New Treatment ◽  
Radiological Image ◽  
Irreversible Pulpitis

Introduction. Apexogenesis is the process of shaping the root for 3 years after the appearance of the crown in the oral cavity. The condition for continuing this process is to preserve the vitality of the tooth. Injury, caries or disorders of the anatomical structure may cause necrosis or irreversible pulpitis. The assumption of endodontic treatment of immature permanent teeth is to create a mineralized barrier closing the lumen of the canal (apexification) or continuing the development of the root (revascularization). Regeneration of the pulpo-dentinal complex allows for the increase of root length, thickening of its walls and narrowing of the apical hole. This can be achieved by a new treatment method – revascularization. The advantage of this therapeutic method is to avoid all the defects arising after endodontic treatment with the use of apexification, i.e. tooth brittleness, susceptibility to root fracture, discoloration of the tooth tissue. Aim. The aim of the study was to evaluate the modern method of treatment of necrosis or irreversible pulpitis in immature permanent teeth by revascularization in the aspect of tissue healing, regeneration of the pulp-dentinal complex, thickness growth and the length of the root walls. Material and methods. The study was conducted among 7 children aged 7-12, including 3 girls and 2 boys. Revascularization was performed in 7 teeth. The study involved 6 central incisors and 1 premolars. During the treatment, polyurethane paste and MTA were used. The control group consisted of patients who were tested using MTA due to the inability to perform revascularization. 23 patients aged 7-13 were qualified to the control group. Control tests were carried out after 3, 6, 12 months after treatment. The clinical condition of the tooth and the radiological image were evaluated. Results. Radiological examination was crucial in assessing the effectiveness of the revascularization procedure. It confirmed the decrease of periapical lesions, increase in root length, root wall thickness and closing of the apical hole. During the clinical examination, the subjective feelings of the patient, discoloration of the tooth's tissues, reaction to tapping, tooth mobility, depth of the gingival pocket, tenderness of the appendage and tightness of the final filling were controlled. The obtained results were compared with the control group. Conclusions. Revascularization is a promising treatment for immature permanent teeth due to the increase in the length of the root and the thickness of its walls. As a result, the teeth after treatment are more durable and are better for long-term maintenance in the mouth. The procedure of revascularization has some limitations at the stage of patient’s qualification for the procedure. If it is not possible to perform this procedure, the alternative is to apexify using MTA.

Evaluation of effectiveness of a new treatment method for healing infected wounds: an animal model

2021 ◽  
Vol 30 (4) ◽  
pp. 312-322
Author(s):  
Alexandr A Basov ◽  
Sergey R Fedosov ◽  
Vadim V Malyshko ◽  
Anna A Elkina ◽  
Oxana M Lyasota ◽  
...  
Keyword(s):  
Wound Healing ◽  
Animal Model ◽  
Active Agent ◽  
Treatment Method ◽  
Healing Time ◽  
Male Adult ◽  
New Device ◽  
Infected Wounds ◽  
New Treatment ◽  
Wound Healing Time

Objective: To evaluate the effectiveness of a new treatment method in healing superficial infected wounds compared with surgical debridement with chlorhexidine solution. Method: In this animal model, two wounds were created on the back of 10 male adult rabbits. Wounds treated by Method 1 were debrided using 0.02% chlorhexidine aqueous solution and an antibiotic topical ointment. Wounds treated by Method 2 wounds were treated using a newly developed device which enabled visual monitoring of the wound as it was treated with various pharmacological solutions (including antiseptic, antiseptic oxidant and an osmotically active agent) specifically formulated for each wound healing stage. Wound area size (using digital planimetry) and time taken to clean the wound were recorded, and biopsies were taken, at the beginning of the study and at various timepoints throughout. Result: It was observed that both wound cleaning and wound healing were accelerated by treatment with method 2 compared with method 1 (by 43.8% and 36.7%, respectively). There were also a significantly smaller number of complications in these wounds [p=0.0044] due to the positive ratios of neutrophils and fibroblasts in the wound cavities (from the third to the fourteenth day after wound modelling). Conclusion: Wounds treated with the new device in method 2 had a shorter wound healing time than wounds treated with a traditional method. The automated influx–outflow of solutions removed any fragments of necrotic tissue from the wound surface. Wounds were able to be monitored without the need to remove dressings. The transparent, airtight film, which allowed for wound monitoring without the need to remove dressings, meant that suturing was not required. This resulted in no complications in the wounds treated by this new method.

scholarly journals Hybrid Knife, a Novel Drug Delivery Tool for Treatment of Tracheal Stenosis: A Case Report

2020 ◽  
pp. 014556132094664
Author(s):  
Yan Yin ◽  
Wen-hui Ma ◽  
Wei Li ◽  
Hai-feng Ma ◽  
Jian Kang ◽  
...  
Keyword(s):  
Tracheal Stenosis ◽  
Balloon Dilatation ◽  
High Efficiency ◽  
Treatment Method ◽  
Subglottic Stenosis ◽  
Submucosal Layer ◽  
Topical Medication ◽  
Pressure Water ◽  
Technological Limitations ◽  
Novel Drug

The treatment of subglottic stenosis remains a challenge due to anatomic and technological limitations, and there is no consensus regarding treatment. Restenosis and granulation formation are the most common complications. Balloon dilatation combined with cryotherapy and adjuvant topical medication is one treatment method. However, the efficacy of adjuvant topical medication is controversial, and the lack of efficacy may be related to the effective dose of the drug delivered to the submucosal layer of the lesion. Therefore, a tool with high efficiency for delivering medications to the submucosal layer via injection may play an important role in treatment. A hybrid knife (HK) with a pressure water jet traditionally used in endoscopy submucosal dissection to inject saline into the submucosa was employed here to inject medications for subglottic stenosis, followed by electrical excision. Here, we report the case of a man with complex subglottic stenosis who underwent balloon dilatation combined with cryotherapy and an adjuvant submucosal triamcinolone injection performed with an HK. The drug was delivered more efficiently into the submucosal layer, and the lumen of the trachea was patent. Performing a submucosal injection with an HK may be a new approach to deliver medications to the submucosal layer for the treatment of tracheal stenosis.

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