Biodegradable and conductive PVA/CNT nanofibrous membranes used in nerve conduit applications

2021 ◽  
pp. 152808372110320
Author(s):  
Jia-Ci Jhang ◽  
Jia-Horng Lin ◽  
Ching-Wen Lou ◽  
Yueh-Sheng Chen
Keyword(s):  
Peripheral Nerves ◽  
Control Group ◽  
Cellular Viability ◽  
Test Results ◽  
Water Contact ◽  
Secondary Damage ◽  
Nerve Conduits ◽  
Qualified Candidate ◽  
Fibrous Morphology ◽  
Fibrous Membranes

The recovery of impaired peripheral nerves is often not as expected, which makes the development of nerve conduits trendy nowadays. To enable the neural messages effectively being delivered as well as to prevent the secondary damage during the removal of nerve conduits, the conductivity and biodegradability are two essential requirements for ideal nerve conduits. In this study, electrospinning is used to produce polyvinyl alcohol (PVA)/carbon nanotubes (CNT) electrospun films, after which the morphology analysis, electrical property, water contact angle, and biological characteristics of the membranes are investigated, thereby determining the optimal nerve conduits based on the employment of electrospinning, PVA, and CNT. The test results indicate that with 0.25 wt% of PVA, the electrospun films exhibit comparatively lower resistance of 25.3 ohm, good fibrous morphology with a diameter being 1 μm. In addition, the electrospun films are cytotoxicity-free and facilitate the growth of cells. It is observed in the MMT assay that after co-cultured with cells for three days, PVA/CNT electrospinning fibrous membranes exhibit a cellular viability that is 18.5 times greater than that of the control group on Day 1. According to all property evaluations, PVA/CNT electrospinning fibrous membranes are a qualified candidate for the use of nervous conduits.

USING CRYOPRESERVED SPERM FOR CREATING STERLET BROOD STOCK

2017 ◽  
pp. 118-127
Author(s):  
Elena Nikolaevna Ponomareva ◽  
Maria Mikhailovna Belaya ◽  
Alexandra Andrianovna Krasilnikova ◽  
Alexander Nickolaevich Nevalennyy
Keyword(s):  
Liquid Nitrogen ◽  
Control Group ◽  
Test Results ◽  
Brood Stock ◽  
Active Response ◽  
Acipenser Ruthenus ◽  
Rostov Region ◽  
The Central Nervous System ◽  
Cryopreserved Sperm ◽  
Sturgeon Fish

The research on the sterlet roe artificial insemination using cryopreserved sperm was carried out in the research base of the RAS Southern Scientific Centre (the Rostov region). Reproductive cells (including cryopreserved cells), larvae, sterlet fry ( Acipenser ruthenus Linnaeus, 1758) were taken as an object of research. A half of the roe (1.7 kg) taken from female starlet was inseminated by native sperm (control group); another half was inseminated by defrosted sperm of two males, which was stored in liquid nitrogen at -196ºC during 3 years (pilot group). Incubation lasted 5 days at water temperature 14.5-18.2ºC, with daily fluctuations of temperature 1.9ºC. Roe insemination in the control group made 90%, in the pilot group - 70%. Roe embryonic growth in the control group was faster, but embryogenesis duration in the pilot group met the standard time limits. Hatching prolarvae in the control group started one hour earlier, than in the pilot group; it made 75% and 60% of all incubated roe, correspondingly. Waste during the period of larvae maturing before they pass to mixed feeding was negligible - 2% in the control group and 3.4% in the pilot group. According to the test results, "open field" of reactivity of the central nervous system in the pilot group fry didn’t change from the control group fry, but more active response to stimuli was noted in the pilot group, which is very important for fry adaptation to the conditions in natural water basins. It was established that sterlet offspring obtained with use of defrosted sexual cells does not differ from the offspring obtained using native sperm and has higher morphometric characteristics. The test results prove the possibility and practicability of using sexual cells stored in liquid nitrogen for artificial restoration and formation of sturgeon fish broodstocks.

The Generalization of Instruction on Genitive Relative Clause in the Acquisition of English as a Foreign Language

2006 ◽  
Vol 151 ◽  
pp. 99-113
Author(s):  
Akihiro Ito
Keyword(s):  
Foreign Language ◽  
Language Learning ◽  
Relative Clause ◽  
Relative Clauses ◽  
Foreign Language Learning ◽  
Control Group ◽  
Test Results ◽  
Japanese Learners Of English ◽  
Special Instruction ◽  
Japanese Learners

This study examines the generalization of instruction in foreign language learning. A group of Japanese learners of English served as participants and received special instruction in the structure of genitive relative clauses. The participants were given a pre-test on combining two sentences into one containing a genitive relative clause wherein the relativized noun phrase following the genitive marker "whose" is either the subject, direct object, or object of preposition. Based on the TOEFL and the pre-test results, four equal groups were formed; three of these served as experimental groups, and one as the control group. Each experimental group was given instruction on the formation of only one type of genitive relative clause. The participants were then given two post-tests. The results indicated that the generalization of learning begins from structures that are typologically more marked genitive relative clauses to those structures that are typologically less marked, and not vice versa.

scholarly journals Intratympanic steroid therapy for Bell’s palsy with poor prognostic results

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Akira Inagaki ◽  
Sachiyo Katsumi ◽  
Shinji Sekiya ◽  
Shingo Murakami
Keyword(s):  
Facial Nerve ◽  
Steroid Therapy ◽  
Standard Dose ◽  
Neuroprotective Effect ◽  
Bell’S Palsy ◽  
Control Group ◽  
Average Dose ◽  
Test Results ◽  
Bell's Palsy ◽  
Intratympanic Dexamethasone

AbstractIn Bell’s palsy, electrodiagnosis by electroneurography (ENoG) is widely used to predict a patient’s prognosis. The therapeutic options for patients with poor prognostic results remain controversial. Here, we investigated whether early intervention with intratympanic steroid therapy (ITST) is an effective treatment for Bell’s palsy patients with poor electrodiagnostic test results (≤ 10% electroneurography value). Patients in the concurrent ITST group (n = 8) received the standard systemic dose of prednisolone (410 mg total) and intratympanic dexamethasone (16.5 mg total) and those in the control group (n = 21) received systemic prednisolone at the standard dose or higher (average dose, 605 ± 27 mg). A year after onset, the recovery rate was higher in the ITST group than in the control group (88% vs 43%, P = 0.044). The average House-Brackmann grade was better in the concurrent ITST group (1.13 ± 0.13 vs 1.71 ± 0.16, P = 0.035). Concurrent ITST improves the facial nerve outcome in patients with poor electroneurography test results, regardless of whether equivalent or lower glucocorticoid doses were administered. This may be ascribed to a neuroprotective effect of ITST due to a higher dose of steroid reaching the lesion due to dexamethasone transfer in the facial nerve.

scholarly journals Surface morphology changes of acrylic resins during finishing and polishing phases

2013 ◽  
Vol 18 (6) ◽  
pp. 26-30 ◽  
Author(s):  
Glaucio Serra ◽  
Liliane Siqueira de Morais ◽  
Carlos Nelson Elias
Keyword(s):  
Surface Morphology ◽  
Acrylic Resin ◽  
Surface Finishing ◽  
Control Group ◽  
Orthodontic Appliances ◽  
Test Results ◽  
Good Surface ◽  
Acrylic Resins ◽  
Polishing Procedures ◽  
Removable Orthodontic Appliances

INTRODUCTION: The finishing and polishing phases are essential to improve smoothness and shining on the surface of acrylic resins used to make removable orthodontic appliances. A good surface finishing reduces roughness, which facilitates hygiene, prevents staining and provides greater comfort to the patients. OBJECTIVE: The aim of this paper was to analyze the changes on surface morphology of acrylic resins during finishing and polishing phases. METHODS: Thirty discs (10 mm in diameter and 5 mm in length) were made with acrylic resin and randomly divided into ten groups. The control group did not receive any treatment while the other groups received gradual finishing and polishing. The last group received the entire finishing and polishing procedures. Surface morphology was qualitatively analyzed through scanning electron microscopy and quantitatively analyzed through a laser profilometer test. RESULTS: The acrylic resin surfaces without treatment showed bubbles which were not observed in the subsequent phases. Wearing out with multilaminated burs, finishing with wood sandpaper and finishing with water sandpaper resulted in surfaces with decreasing irregularities. The surfaces that were polished with pumice and with low abrasive liquids showed high superficial smoothness. CONCLUSION: Highly smooth acrylic resin surfaces can be obtained after mechanical finishing and polishing performed with multilaminated burs, wood sandpaper, water sandpaper, pumice and low abrasive liquids.

An Analysis of the Matrix (Progressive Matrices) Test Results on 700 Neurotic (Military) Subjects, and a Comparison with the Shipley Vocabulary Test

1943 ◽  
Vol 89 (375) ◽  
pp. 202-215 ◽  
Author(s):  
H. Halstead
Keyword(s):  
Control Group ◽  
Vocabulary Test ◽  
Test Results ◽  
Emergency Hospital ◽  
The Matrix ◽  
Military Patients ◽  
Group 1

Seven hundred Progressive Matrices records of male neurotic military patients admitted to Sutton Emergency Hospital between April and November, 1942, were compared with a control group (1). The distribution of the patients' scores shows a negatively skewed curve with a clustering of scores below the control median (Fig. 1).

scholarly journals Intravesical prostaglandin e2 effectiveness in the prevention of urinary retention after transvaginal reconstruction of the pubo-cervical fascia and short arm sling according to Lahodny: a prospective randomized clinical trial

2010 ◽  
Vol 14 (1) ◽  
pp. 15 ◽  
Author(s):  
G. QUADRI ◽  
N. NATALE ◽  
C. SPREAFICO ◽  
C. BELLONI ◽  
D. BARISANI ◽  
...  
Keyword(s):  
Prostaglandin E2 ◽  
Urinary Retention ◽  
Study Groups ◽  
T Test ◽  
Control Group ◽  
Fisher Exact Test ◽  
Test Results ◽  
Exact Test ◽  
Student’S T ◽  
Student’S T Test

Intravesical prostaglandin E2 is effective in the recovery of spontaneous voiding after transvaginal reconstruction of the pubocervical fascia and short arm sling according to Lahodny. The aim of the study was to compare the effects of intravesical prostaglandin E2 in the prevention of urinary retention after transvaginal reconstruction of the pubocervical fascia and short arm sling according to Lahodny. STUDY DESIGN: From November 1996 to June 1999 fifty women underwent the Lahodny procedure for moderate/severe cystocele and stress urinary incontinence. Women were randomly assigned to 1 of the 2 study groups: intravesical prostaglandin E2 versus controls. Data obtained were analyzed with the Student t test and the Fisher exact test. RESULTS: Two patients of the treatment group had to be excluded from the study, one because of the wrong measurement of the post-voidal residual volume and another due to a fastidious burning sensation which appeared immediately after prostaglandin instillation and required the suspension of the treatment. No other side effects such as nausea, vomiting, diarrhea or hyperthermia were observed. Patients who underwent the prostaglandin E2 treatment showed a recovery of spontaneous voiding after 7.9±6.7 days, whereas this interval was significantly longer in the control group, being 12.9±9.7 days (p=0.04, Two tailed Unpaired Student's T test). CONCLUSION: The effectiveness and the low associated morbidity mark the treatment with intravesical prostaglandin E2 useful in the recovery of normal voiding after transvaginal pubocervical fascia reconstruction and short arm sling with the procedure according to Lahodny.

scholarly journals Labelling Improves False Belief Understanding. A Training Study

2013 ◽  
Vol 16 ◽  
Author(s):  
Elisabet Serrat Sellabona ◽  
Carles Rostan Sánchez ◽  
Eduard Vallès Majoral ◽  
Moisès Esteban Guitart ◽  
Francesc Sidera Caballero ◽  
...  
Keyword(s):  
False Belief ◽  
Control Group ◽  
Test Results ◽  
Training Study ◽  
Linguistic Experience ◽  
Training Conditions ◽  
Remarkable Improvement ◽  
False Belief Understanding ◽  
Post Test ◽  
The Relationship

AbstractA total of 104 children aged between 41 and 47 months were selected to study the relationship between language and false belief understanding. Participants were assigned to four different training conditions: discourse, labelling, control (all with deceptive objects), and sentential complements (involving non-deceptive objects). Post-test results showed an improvement in children’s false belief understanding in the discourse and the labelling conditions, but not in the sentential complements with non-deceptive objects or the control group. Furthermore, the most remarkable improvement in false belief understanding occurred in the labelling group. These results suggest that some types of linguistic experience promote the development of false belief understanding, provided that differing perspectives are confronted.

scholarly journals Pengaruh Metode Pembelajaran Mind Mapping terhadap Hasil Belajar pada Pokok Bahasan Hukum-Hukum Dasar Kimia Siswa Kelas X Semester Ganjil di SMA Negeri 2 Langowan

2019 ◽  
Vol 1 (2) ◽  
pp. 107
Author(s):  
Frindly Makarawung ◽  
I Dewe Ketut Anom ◽  
John Lombok
Keyword(s):  
Student Learning ◽  
Learning Outcomes ◽  
Student Learning Outcomes ◽  
Control Group ◽  
Test Results ◽  
Mind Mapping ◽  
Learning Methods ◽  
Control Group Design ◽  
Average Value ◽  
Post Test

This research aims to determine the effect of mind mapping learning methods on the basic laws of chemistry toward learning outcomes of students of class X MIPA in SMA Negeri 2 Langowan. The sample used in this study were all students of class X MIPA of SMA Negeri 2 Langowan. This research uses an experimental method, with the research method used is Quasi Experiment  with Nonequivalent Control Group Design design. The research data were obtained from post-test results. Obtained the average value of student learning outcomes Experiment class is 85. The results showed the value of tcount = 15.7> ttable = 2.21, so H0 was rejected and H1 was accepted. Based on the results of the research it can be concluded that there is an influence on student learning outcomes on the basic laws of chemistry using mind mapping learning methods.

scholarly journals The effect of 8-week thera-band exercises on male swimmers’ 100 m freestyle swimming performance

2017 ◽  
Vol 14 (4) ◽  
pp. 3950 ◽  
Author(s):  
Ahmet Gönener ◽  
Utku Gönener ◽  
Ozan Yılmaz ◽  
Tuğçe Horoz ◽  
Deniz Demirci
Keyword(s):  
Swimming Performance ◽  
Training Programme ◽  
Rank Test ◽  
Control Group ◽  
Study Group ◽  
Test Results ◽  
Signed Rank ◽  
Post Test ◽  
Signed Rank Test ◽  
And Control

The aim of this study is to investigate 8 weeks Thera-Band trainings' effects on male swimmers' 100 m freestyle swimming performance.The study group is created by 20 (n = 20) licenced male athletes that had trained at least 3 days in a week and have been active in swimming sport at least 3 years in Gebze Genclerbirligi Swimming Club 20 (n = 20). Athletes were divided into experiment group (n = 10) and control group (n = 10) randomly. Training programme was applied to the study group for 55-60 minutes for 3 days on alternate days and times when the club does not have swimming training. 12 different Thera-Band trainings were applied for 40-45 mins and each set was 15 minutes.Mann-Whitney U test was used to analyze differences between groups and Wilcoxon signed rank test was applied for analyzing the differences of intra-groups. SPSS 21.0 Statistics package software was used for statistical analyzes. The results show that there are no significantly differences between experimental group's and control group's post test results. (p>0.05). Statistically significant differences are found as a result of intra-group comparison of the experimental group's pre-test and post-test results (p<0.05).Depending on the results obtained after reviewing the literature, it can be concluded that Thera-Band training is effective on the performance improvement of swimmers aged 13-15 years.

scholarly journals Formation of mediation competence of participants in the educational space of the Krasnoyarsk Territory in the Siberian Federal University

2020 ◽  
Vol 47 (5) ◽  
pp. 413-428
Author(s):  
Olga G. Smolyaninova ◽  
◽  
Vera V. Korshunova ◽  
Olga O. Andronnikova ◽  
◽  
...  
Keyword(s):  
Emotional Awareness ◽  
Academic Community ◽  
Educational Process ◽  
Control Group ◽  
Behavior Changes ◽  
Test Results ◽  
Interethnic Relations ◽  
Communicative Skills ◽  
Significant Difference ◽  
Trained Teachers

Introduction. The relevance of the study is due to the lack of trained teachers - heads of school mediation services and future mediators. Reducing the deficit is possible only through increasing the competence of teachers in the field of conflict resolution and the formation of the ability and readiness to use mediation practices aimed at creating a conflict-free educational environment and harmonizing interethnic relations in a multicultural educational space. The authors presented a component-wise model of the formation of mediated competence of participants in the educational process from among the heads of school mediation services and future mediators and tested it. Materials and methods. The study used methods of measuring the components of mediation competence: communicative, information-analytical, organizational and managerial, emotional. The study involved two groups: students of the professional retraining program “Mediation. Psychology of Conflict Management ”55 people (experimental group) and 60 people (control group), teachers who are not trained in mediation programs. Comparative analysis of groups was carried out using the U-Mann-Whitney test. Results. Analysis of the effectiveness of the formation of mediation competence showed significant differences (p <0.05) on a number of scales that affect the effectiveness of the formation of components of mediation competence. Significant changes (p <0.05) were revealed in terms of the parameters of the severity of communicative skills, which indicates the formation of a confident partner style of behavior. Changes in the components of emotional competence are significant: emotional awareness (p = 0, 002), emotion management (p = 0, 045), recognition of other people's emotions (p = 0.021). There is a significant difference in the formation of information and analytical competence (p <0.05), primarily in the parameter of motivation (p = 0.000) of using mediation practices to resolve conflicts. Conclusion. It was revealed that the formation of the mediation competence of participants in the educational space of the Krasnoyarsk Territory can go through professional retraining programs and will be effective when combining the efforts of the academic community and practicing mediators, professional mediator communities and the cooperation of resources of various Siberian universities.

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