scholarly journals Preparation of Tubular Biocellulose Implants and Its Use in Surgery—A Review

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2114
Author(s):  
Dieter Otto Klemm ◽  
Vanessa Raddatz ◽  
Katrin Petzold-Welcke ◽  
Friederike Kramer ◽  
Carola Ruhe ◽  
...  
Keyword(s):  
Acetic Acid Bacteria ◽  
Special Focus ◽  
Complication Rates ◽  
Natural Polymer ◽  
Oncologic Surgery ◽  
Surgical Interventions ◽  
Current State ◽  
Application Potential ◽  
Property Profile

This review highlights the current state regarding the preparation and characterization of tubular biocellulose materials as well as their application and application potential with a special focus on abdominal oncologic surgery. Biocellulose is a natural polymer synthesized by acetic acid bacteria from low molecular sugars and alcohols as a mechanically stable nanofiber network at the interface between the aqueous culture medium and air. This hydrogel is characterized by very high purity and biocompatibility, dimensional stability, and good surgical handling. With this property profile, biocellulose proves to be a promising candidate for the development of novel medical soft tissue implants. This requires close R&D cooperation between chemists, material scientists, biotechnologists, and surgeons. In this sense, this review spans from the natural polymer to the design of biocellulose implants and surgical suitability. It is also a concern of this article to show concretely the great need for such implants and the fields of application in oncological abdominal surgery where tubular biocellulose is or could be the focus of research. Furthermore, a critical assessment for the use of biocellulose materials concerning incidence malignancy and surgical interventions, complication rates, and current studies is emphasized. The regeneration of damaged bile ducts by the use of biocellulose implants is a first example.

In-vivo evaluation of cisplatin nanoparticles encompass natural polymer

2020 ◽  
Vol 6 (1) ◽  
pp. 1-7
Author(s):  
Bhavani J ◽  
Sunil Kumar Prajapati ◽  
Ravichandran S
Keyword(s):  
Tumor Volume ◽  
Nitrogen Mustard ◽  
Common Type ◽  
The Body ◽  
Nano Particles ◽  
Natural Polymer ◽  
Drinking Alcohol ◽  
In Vivo Evaluation

Cancer is assemblage diseases involving abnormal cell growth amid the potential of spread to other parts of the body due to tobacco use are the cause of about of cancer deaths. Another 10% is due to obesity, poor diet & drinking alcohol. In 2012 about 14.1 million new cases of cancer occurred globally. In females, the most common type is breast cancer. Cisplatin also known as cytophosphane is a nitrogen mustard alkylating agent from the oxazophosphinans groups were used to treat cancers & autoimmune disorders. Based on the above reasons I will fix the aim Preparation characterization of Cisplatin- nano particles  &  its anticancer activity. Solid tumor volume examination report showed that the assessment of different day indication 15,20,25 & 30th variations of different groups of tumor volumes were decreased CPG Nanoparticles (100 mg/kg)+ DAL(15th day 4.97±0.24↓), (20th day 0.6±0.13↓), (25th day 1.35±0.30↓) & (30th day 1.89±0.13↓).

Characterization of Beldi chicken and turkeys in rural poultry flocks of Morocco. Current state and future outlook

2001 ◽  
Vol 31 ◽  
pp. 87-95 ◽  
Author(s):  
K. Benabdeljelil ◽  
T. Arfaoui
Keyword(s):  
Rural Areas ◽  
Sexual Maturity ◽  
Phenotypic Variability ◽  
Future Outlook ◽  
Current State ◽  
Production Improvement ◽  
Rural Poultry

SummaryThe main characteristics of Beldi (meaning “native” in Arabic) poultry raised in rural areas were studied in the Khenifra Region through extensive surveys.Beldi chickens have large phenotypic variability. Black, brown, grey and white colours, pure or mixed, are frequently observed in chickens' featherings while turkeys are predominantly bronze. Plumage types were fairly homogeneous in both species. Single combs and dented combs were respectively predominant in chicken hens and roosters.Sexual maturity was reached at 154 days for roosters, 168 for hens in chicken, around 217 days for toms and 231 for turkey hens. The age at first egg averaged 5.8 months for hens and 8.4 months for turkey hens. The number of eggs laid per hen per year was 78 for chicken and 69 for turkey. Hatchability rate was 78 and 80 percent for chicken and turkeys, respectively. Diseases were the main cause of mortality, which could affect up to 77 percent of chicken flocks.Few preliminary urgent steps for the conservation of Beldi poultry are discussed with other production improvement proposals.

scholarly journals Outcomes After Lumbar Disk Herniation Surgery in the Dutch Population

2021 ◽  
pp. 219256822199112
Author(s):  
Maike H. J. Schepens ◽  
Miranda L. van Hooff ◽  
Judith A. van Erkelens ◽  
Ronald Bartels ◽  
Eric Hoebink ◽  
...  
Keyword(s):  
Nerve Root ◽  
Volume Effect ◽  
Complication Rates ◽  
Disk Herniation ◽  
Opioid Use ◽  
Lumbar Disk Herniation ◽  
Surgical Interventions ◽  
Nerve Root Block ◽  
Lumbar Disk ◽  
Primary Surgery

Study Design: Retrospective cohort study. Objective: There is only limited data on the outcome of primary surgery of lumbar disk herniation (LDH) in Dutch patients. The objective of this study is to describe undesirable outcomes after primary LDH. Methods: The National Claims Database (Vektis) was searched for primary LDH operations performed from July 2015 until June 2016, for reoperations within 18 months, prescription of opioids between 6 to 12 months and nerve root block within 1 year. A combined outcome measure was also made. Group comparisons were analyzed with the Student’s t-test. Results: Primary LDH surgery was performed in 6895 patients in 70 hospitals. Weighted mean of reoperations was 7.3%, nerve root block 6.7% and opioid use 15.6%. In total, 23.0% of patients had one or more undesirable outcomes after surgery. The 95% CI interval exceeded the 50% incidence line for 14 out of 26 hospitals with less than 50 surgical interventions per year. Although the data suggested a volume effect on undesired outcomes, the t-tests between hospitals with volume thresholds of 100, 150 and 200 interventions per year did not support this ( P values 0.078, 0.129, 0.114). Conclusion: This unique nationwide claims-based study provides insight into patient-relevant undesirable outcomes such as reoperation, nerve root block and opioid use after LDH surgery. About a quarter of the patients had a serious complication in the first follow up year that prompted further medical treatment. There is a wide variation in complication rates between hospitals with a trend that supports concentration of LDH care.

scholarly journals Charge-dependent flow as evidence of strong electromagnetic fields in heavy-ion collisions

2020 ◽  
Vol 35 (39) ◽  
pp. 2050324
Author(s):  
Andrea Dubla ◽  
Umut Gürsoy ◽  
Raimond Snellings
Keyword(s):  
Electromagnetic Fields ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Experimental Characterization ◽  
Ion Collisions ◽  
Current State ◽  
Theoretical Predictions ◽  
Dependent Flow

The extremely large electromagnetic fields generated in heavy-ion collisions provide access to novel observables that are expected to constrain various key transport properties of the quark-gluon plasma and could help solve one of the outstanding puzzles in QCD: the strong CP problem. In this review we present a brief overview of the theoretical and experimental characterization of these electromagnetic fields. After reviewing the current state, emphasizing one of the observables — the charge-dependent flow — we discuss the various discrepancies between the measurements and theoretical predictions. Finally, to help resolve the discrepancies, we suggest new measurements and theoretical ideas.

scholarly journals Rare earth based nanostructured materials: synthesis, functionalization, properties and bioimaging and biosensing applications

Nanophotonics ◽  
2017 ◽  
Vol 6 (5) ◽  
pp. 881-921 ◽  
Author(s):  
Alberto Escudero ◽  
Ana I. Becerro ◽  
Carolina Carrillo-Carrión ◽  
Nuria O. Núñez ◽  
Mikhail V. Zyuzin ◽  
...  
Keyword(s):  
Rare Earth ◽  
Functional Materials ◽  
Synthesis Methods ◽  
Special Focus ◽  
X Rays ◽  
Materials Synthesis ◽  
Comprehensive Overview ◽  
Current State ◽  
Metal Organic ◽  
X Ray Computed

AbstractRare earth based nanostructures constitute a type of functional materials widely used and studied in the recent literature. The purpose of this review is to provide a general and comprehensive overview of the current state of the art, with special focus on the commonly employed synthesis methods and functionalization strategies of rare earth based nanoparticles and on their different bioimaging and biosensing applications. The luminescent (including downconversion, upconversion and permanent luminescence) and magnetic properties of rare earth based nanoparticles, as well as their ability to absorb X-rays, will also be explained and connected with their luminescent, magnetic resonance and X-ray computed tomography bioimaging applications, respectively. This review is not only restricted to nanoparticles, and recent advances reported for in other nanostructures containing rare earths, such as metal organic frameworks and lanthanide complexes conjugated with biological structures, will also be commented on.

The versatility of the Bristow absorption tester – a review

2018 ◽  
Vol 33 (2) ◽  
pp. 279-296 ◽  
Author(s):  
Sami-Seppo Ovaska ◽  
Kaj Backfolk
Keyword(s):  
Special Focus ◽  
Print Quality ◽  
Substrate Roughness ◽  
Time Intervals ◽  
Absorption Properties ◽  
Liquid Absorption ◽  
Short Time ◽  
Printing Processes

Abstract This paper reviews the use of the Bristow Absorption Tester (known also as the Bristow wheel) in the characterization of fiber-based substrates. The Bristow wheel is a laboratory-scale instrument that has been designed for studying substrate wettability and dynamic liquid absorption properties in short time intervals, which are important in many converting and printing processes of paper and paperboard. The tester also gives information about substrate roughness. The Bristow wheel has shown great usefulness in predicting print quality especially in inkjet applications, in which a good correlation between print quality (letter area) and ink penetration rate has been found by several researchers. The apparatus is particularly useful in dynamic wetting studies, but it has also been successfully used in numerous other research purposes such as the determination of the degree of sizing, evaluation of material glueability, and various coatability studies. Modifications of both the testing principle and the tester structure have also been reported. These include e. g. equipping the apparatus with a corona unit that makes it possible to mimic a printing process on a relevant time-scale. This review summarizes the reported applications of Bristow wheel with a special focus on tester performance and versatility.

Biotechnological production of cellulose by acetic acid bacteria: current state and perspectives

2018 ◽  
Vol 102 (16) ◽  
pp. 6885-6898 ◽  
Author(s):  
Maria Gullo ◽  
Salvatore La China ◽  
Pasquale Massimiliano Falcone ◽  
Paolo Giudici
Keyword(s):  
Acetic Acid ◽  
Acetic Acid Bacteria ◽  
Biotechnological Production ◽  
Current State

scholarly journals Novel Riboflavin-Inspired Conjugated Bio-Organic Semiconductors

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2271 ◽  
Author(s):  
Jan Richtar ◽  
Patricie Heinrichova ◽  
Dogukan Apaydin ◽  
Veronika Schmiedova ◽  
Cigdem Yumusak ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Organic Semiconductors ◽  
Intramolecular Proton Transfer ◽  
Fine Tuning ◽  
Conjugated Materials ◽  
Absorption And Emission ◽  
Application Potential ◽  
Synthetic Approaches ◽  
Comprehensive Characterization

Flavins are known to be extremely versatile, thus enabling routes to innumerable modifications in order to obtain desired properties. Thus, in the present paper, the group of bio-inspired conjugated materials based on the alloxazine core is synthetized using two efficient novel synthetic approaches providing relatively high reaction yields. The comprehensive characterization of the materials, in order to evaluate the properties and application potential, has shown that the modification of the initial alloxazine core with aromatic substituents allows fine tuning of the optical bandgap, position of electronic orbitals, absorption and emission properties. Interestingly, the compounds possess multichromophoric behavior, which is assumed to be the results of an intramolecular proton transfer.

Sign in / Sign up

Export Citation Format

Share Document