scholarly journals Porous substrate affects a subsequent attachment ability of the beetle Harmonia axyridis (Coleoptera, Coccinellidae)

2019 ◽  
Vol 16 (150) ◽  
pp. 20180696 ◽  
Author(s):  
Elena V. Gorb ◽  
Wiebke Lemke ◽  
Stanislav N. Gorb

According to literature data, porous substrates can cause a reduction of insect attachment ability. We carried out traction experiments with adult ladybird beetles Harmonia axyridis on the smooth solid glass sample and rough porous Al 2 O 3 membrane to prove the primary effect of absorption of the insect pad secretion by porous media, rather than surface roughness, on the attachment force on the porous sample. With each insect individual, a set of five experiments was conducted: (1) on glass; (2) on the porous membrane; (3–5) on glass immediately after the test on the porous surface, then after 30 min and 1 h of recovery time. On the porous substrate, the forces, being similar in females and males, were greatly reduced compared to those measured on glass. A significant difference between the force values obtained in the first (before the test on the porous sample) and second (immediately after the experiment on the porous sample) tests on glass was observed. After 30 min recovery time, beetles completely regained their attachment ability. Females produced significantly lower forces than males in all experiments on glass: the differences are probably caused by the sexual dimorphism in the microstructure of their adhesive pads. The obtained results are of fundamental importance for further application in biomimetics of novel insect-repelling surfaces and in plant protection by using porous materials.

2014 ◽  
Vol 5 ◽  
pp. 1031-1041 ◽  
Author(s):  
Elena Gorb ◽  
Sandro Böhm ◽  
Nadine Jacky ◽  
Louis-Philippe Maier ◽  
Kirstin Dening ◽  
...  

The impeding effect of plant surfaces covered with three-dimensional wax on attachment and locomotion of insects has been shown previously in numerous experimental studies. The aim of this study was to examine the effect of different parameters of crystalline wax coverage on insect attachment. We performed traction experiments with the beetle Coccinella septempunctata and pull-off force measurements with artificial adhesive systems (tacky polydimethylsiloxane semi-spheres) on bioinspired wax surfaces formed by four alkanes of varying chain lengths (C36H74, C40H82, C44H90, and C50H102). All these highly hydrophobic coatings were composed of crystals having similar morphologies but differing in size and distribution/density, and exhibited different surface roughness. The crystal size (length and thickness) decreased with an increase of the chain length of the alkanes that formed these surfaces, whereas the density of the wax coverage, as well as the surface roughness, showed an opposite relationship. Traction tests demonstrated a significant, up to 30 fold, reduction of insect attachment forces on the wax surfaces when compared with the reference glass sample. Attachment of the beetles to the wax substrates probably relied solely on the performance of adhesive pads. We found no influence of the wax coatings on the subsequent attachment ability of beetles. The obtained data are explained by the reduction of the real contact between the setal tips of the insect adhesive pads and the wax surfaces due to the micro- and nanoscopic roughness introduced by wax crystals. Experiments with polydimethylsiloxane semi-spheres showed much higher forces on wax samples when compared to insect attachment forces measured on these surfaces. We explain these results by the differences in material properties between polydimethylsiloxane probes and tenent setae of C. septempunctata beetles. Among wax surfaces, force experiments showed stronger insect attachment and higher pull-off forces of polydimethylsiloxane probes on wax surfaces having a higher density of wax coverage, created by smaller crystals.


2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Isabella Metelmann ◽  
Johannes Broschewitz ◽  
Uta-Carolin Pietsch ◽  
Gerald Huschak ◽  
Uwe Eichfeld ◽  
...  

Abstract Background Non-intubated video-assisted thoracic surgery (NiVATS) has been introduced to surgical medicine in order to reduce the invasiveness of anesthetic procedures and avoid adverse effects of intubation and one-lung ventilation (OLV). The aim of this study is to determine the time effectiveness of a NiVATS program compared to conventional OLV. Methods This retrospective analysis included all patients in Leipzig University Hospital that needed minor VATS surgery between November 2016 and October 2019 constituting a NiVATS (n = 67) and an OLV (n = 36) group. Perioperative data was matched via propensity score analysis, identifying two comparable groups with 23 patients. Matched pairs were compared via t-Test. Results Patients in NiVATS and OLV group show no significant differences other than the type of surgical procedure performed. Wedge resection was performed significantly more often under NiVATS conditions than with OLV (p = 0,043). Recovery time was significantly reduced by 7 min (p = 0,000) in the NiVATS group. There was no significant difference in the time for induction of anesthesia, duration of surgical procedure or overall procedural time. Conclusions Recovery time was significantly shorter in NiVATS, but this effect disappeared when extrapolated to total procedural time. Even during the implementation phase of NiVATS programs, no extension of procedural times occurs.


2017 ◽  
Vol 53 (No. 2) ◽  
pp. 101-107 ◽  
Author(s):  
Liu Shao-Fang ◽  
Wang Guang-Jun ◽  
Nong Xiang-Qun ◽  
Liu Bin ◽  
Wang Miao-Miao ◽  
...  

The benefit of the entomopathogen Metarhizium anisopliae to early root development was evaluated. Two inoculating methods, conidia-suspension-drenching (T<sub>1</sub>) and conidia-coating (T<sub>2</sub>), were used when sowing peanut. The results showed that taproot length and lateral root number in T<sub>1</sub> significantly increased compared to the control (T<sub>0</sub>) in days 4–10 after treatment, whereas no significant difference was found between T<sub>2</sub> and T<sub>0</sub>. The fungal density by T<sub>1</sub> and T<sub>2</sub> fluctuated in the first 8 days, followed by a gradual decline. The ratio of the taproot length or lateral root number in T<sub>1 </sub>and T<sub>0</sub> was significant relative to the fungal persistence. It suggested that M. anisopliae promotes peanut root development and should be considered as important factor in plant protection besides pest controls.


2020 ◽  
Vol 161 (45) ◽  
pp. 1920-1926
Author(s):  
Eszter Erdélyi ◽  
Gréta Csorba ◽  
Beáta Kiss-Fekete ◽  
Gabriella Fekete-Szabó ◽  
Balázs Sztanó ◽  
...  

Összefoglaló. Bevezetés és célkitűzés: A szerzők a posztoperatív fájdalom és a sebgyógyulás tekintetében prospektív vizsgálattal hasonlították össze gyermekeken (67 fő, 1–12 év) a hagyományos hidegeszközzel történő extracapsularis tonsillectomiát (23 fő) a microdebriderrel (23 fő) és a coblatorral (21 fő) végzett intracapsularis tonsillotomiával. Módszer: A vizsgálatok a betegek által kitöltött kérdőívek, valamint prospektív klinikai adatgyűjtés alapján történtek. Eredmények: Az intracapsularis tonsillotomia gyógyulási idejét 50%-kal rövidebbnek találtuk, és az első 13 napban szignifikánsan kevesebb fájdalommal és fájdalomcsillapító igénnyel járt, mint az extracapsularis tonsillectomia eseteiben. A tonsillotomiás csoporton belül egyedül a posztoperatív első napi fájdalom tekintetében észleltünk szignifikáns különbséget a két különböző módszer között a coblator javára (p<0,05). A vizsgálatokat retrospektív áttekintéssel is kiegészítettük, 4 évi gyermek- (1–15 éves) tonsillaműtéten átesett beteganyagunk (1487 fő) eredményeinek feldolgozásával. Tonsillectomia (1253 fő) után 7,7%-os utóvérzési arányt észleltünk, műtéti vérzéscsillapításra 1,3%-ban volt szükség. Tonsillotomia esetén (234 fő) 0,43%-os utóvérzési arányt regisztráltunk. Ebben a csoportban vérzés miatt nem, de 2 esetben ismételt obstrukciót okozó hypertrophia, 1 esetben góctünetek miatt reoperációt végeztünk (1,28%). Következtetés: Eredményeiket a szerzők a nemzetközi ajánlások tükrében elemezték. Az intracapsularis tonsillotomia kisebb fájdalommal, kisebb vérzéssel és kisebb megterheléssel jár. A közösségbe való aktív visszatérés akár egy hét után lehetséges a tonsillectomiára jellemző 3 héttel szemben, mindez jelentős szocioökonómiai előnyökkel járhat. Orv Hetil. 2020; 161(45): 1920–1926. Summary. Introduction and objective: Examining operated children in this prostective study inditerscompared (67 pts, 1–12 yrs) the extracapsular tonsillectomy with conventional cold-knife (23 pts) to extracapsular tonsillotomy with microdebrider (23 pts) and coblator (21 pts) for postoperative pain and wound-healing disorders. Method: The study was based on patient-completed questionnaires as well as prospective clinical data collection. Results: The recovery time of intracapsular tonsillotomy was found less than 50%, with less pain than in the cases of extracapsular tonsillectomy. Postoperative pain was significantly less in the tonsillototomy group than the tonsillectomy group. Within the tonsillotomy group, a significant difference was observed between the two different methods in favor of the coblator for only the postoperative first-day pain. The studies were supplemented with a retrospective review by processing the 4 yrs results of their pediatric (1–15-yrs) patients who underwent tonsillectomy (1487 pts). After tonsillectomy (1253 pts), a postoperative bleeding rate of 7.7% was observed, and surgical hemostasis was required in 1.3%. In the case of tonsillotomy (234 pts), a postoperative bleeding rate of 0.43% was recorded. In this group, reoperation was not performed due to bleeding, whereas it was neccesary in 2 cases due to hypertrophy causing repeated obstruction, in 1 case due by virtue of focal symptomes (1.28%). Conclusion: Our results were analyzed on the basis of international recommendations. Intracapsular tonsillotomy is associated with less pain, less bleeding, and less strain. Active return to the community is possible after up to a week compared to the 3 weeks typical of tonsillectomy, all of which can have significant socioeconomic benefits. Orv Hetil. 2020; 161(45): 1920–1926.


Author(s):  
Mohsen Foroughi ◽  
Ellahe Fakhr Tabatabai ◽  
Shahriar Saeidian

The purpose of this search is the response of male athlete and non-athlete coagulation factor , fibrinolysis and time of recovery after one session of exhaustive anaerobic activity A quasi-experimental study was performed on 24 male students (athletes, non athletes)', from `18 to 24. Exercise protocol was RAST test, in which every tester covered 6 times the distance of 35 meters with all his power and there was 10 seconds for resting. Three stages of blood sampling were performed ) befor,immediately and one hour after the test).Data was analyzed by using Kolomogrof Smirnov test, Levin test, the statistical analysis method of compound variance and Kruskal-Wallis (p<0/05). The result of this study shows that a session of anaerobic activity has significant impact on hematocrit ،platelete and noncoagulation)D-Dimer ( athlete group, hematocrit and time of non-athelete PTT and also platelets, D-Dimer and time of recovery between two groups. But no significant difference for athlete group PTT, platelets and D-Dimer group of non-athletes,PT and fibrinogen in both groups (athlete and non-athlete) and also PT, PTT, hematocrit and fibrinogen were observed. This search offers that a session of anaerobic activity on blood coagulation, fibrinolysis and recovery time was effective. So the responses of athlete and non-athlete people can be differentof in some factors .


2012 ◽  
pp. 89-93
Author(s):  
Tamás Árendás ◽  
Zoltán Berzsenyi ◽  
Péter Bónis

The effect of crop production factors on the grain yield was analysed on the basis of three-factorial experiments laid out in a split-split-plot design. In the case of maize the studies were made as part of a long-term experiment set up in 1980 on chernozem soil with forest residues, well supplied with N and very well with PK. The effects of five N levels in the main plots and four sowing dates in the subplots were compared in terms of the performance of four medium early hybrids (FAO 200). In the technological adaptation experiments carried out with durum wheat, the N supplies were moderate (2010) or good (2011), while the P and K supplies were good or very good in both years. Six N top-dressing treatments were applied in the main plots and five plant protection treatments in the subplots to test the responses of three varieties. The results were evaluated using analysis of variance, while correlations between the variables were detected using regression analysis.The effect of the tested factors on the grain yield was significant in the three-factorial maize experiment despite the annual fluctuations, reflected in extremely variable environmental means. During the given period the effect of N fertilisation surpassed that of the sowing date and the genotype. Regression analysis on the N responses for various sowing dates showed that maize sown in the middle 10 days of April gave the highest yield, but the N rates required to achieve maximum values declined as sowing was delayed. In the very wet year, the yield of durum wheat was influenced to the greatest extent by the plant protection treatments, while N supplies and the choice of variety were of approximately the same importance.  In the favourable year the yielding ability was determined by topdressing and the importance of plant protection dropped to half,  while no  significant difference could be detected between the tested varieties. According to the results of regression analysis, the positive effect of plant protection could not be substituted by an increase in the N rate in either year. The achievement of higher yields was only possible by a joint intensification of plant protection and N fertilisation. Nevertheless, the use of more efficient chemicals led to a slightly, though not significantly, higher yield, with a lower N requirement. 


2021 ◽  
Vol 15 (5) ◽  
pp. 1024-1027
Author(s):  
Asma Samreen ◽  
Aamir Waseem ◽  
Muhammad Azam ◽  
Itrat Hussain Kazmi ◽  
Aamir Bashir ◽  
...  

Background: Procedural sedation is required for multiple short duration procedures outside of the operating rooms especially in radiology and endoscopy suites. Intravenous anesthetic agent with rapid recovery profile is desirable in such circumstances. This study aims to compare two regimens of intravenous anesthetic agents. Aim: To compare the mean recovery time of propofol and midazolam with propofol alone for sedation in endoscopic retrograde cholangiopancreatography. Study Design: Randomized controlled trial. Settings: Department of Anesthesia, Shalamar Hospital, Lahore. Study Duration: June 2017 to December 2017. Methods: A total of 70 adult patients aged 20-60 years undergoing ERCP under sedation were included. Patients were given a combination of propofol and midazolam in group A while propofol alone was given in group B. After procedure, pts were transferred to recovery room and were followed for assessment of recovery time. Data were analyzed in SPSS vr 21, Independent t-test was applied & p-value ≤0.05 was considered statistically significant. Results: Significant difference was found in mean recovery time amongst both the groups. Mean recovery time in Group A (propofol and midazolam) was 19.29±4.50 minutes while in Group B (propofol alone) was 26.66±3.70 minutes showing statistically significant result with p-value = 0.0001. Conclusion: We conclude that mean recovery time with propofol plus midazolam is shorter as compared to propofol alone for sedation in ERCP. Keywords: Propofol, midazolam, sedation outside operation theatre.


2020 ◽  
Vol 58 (2) ◽  
pp. 314-321
Author(s):  
Caroline Le Goff ◽  
Jean-François Kaux ◽  
Jordi Farre Segura ◽  
Violeta Stojkovic ◽  
Arnaud Ancion ◽  
...  

AbstractBackgroundPrevious studies have suggested that exercising may induce cardiac damage. Galectin-3 (Gal-3) and soluble suppression of tumorigenicity 2 (ST2) are very interesting biomarkers for heart failure and myocardial fibrosis. We aimed to compare the kinetics of emerging fibrosis cardiac biomarkers as Gal-3 and ST-2 in endurance runners, and recreational runners before and after a running event represented by a marathon and an ultratrail event.MethodsBlood samples were taken from 19 healthy non-elite marathon runners (42 km), 27 ultratour runners (67 km), and 14 recreational runners who represented the control group (10 km) just before the run (T0), just after (T1) and 3 h after (T2), in order to analyze Gal-3, ST2, hsTnT, NT-proBNP, CKMB and hsCRP. We compared the percentage of evolution and the slopes obtained from T0 to T1 (pT0T1) and from T1 to T2 (pT1T2), between the different groups of runners participating in three different races.ResultsPlasma cardiac biomarker concentrations increased significantly from baseline to immediately post-exercise and most of the time decreased over the subsequent 3-h period. For pT0T1 and pT1T2, the markers Gal-3 and ST2 showed a significant difference between types of run (p < 0.05 and p < 0.0001, respectively). During the recovery time, Gal-3 returned to the baseline values but not ST2 which continued to increase.ConclusionsGal-3 and ST2 are considered as a reflection of cardiac fibrosis and remodeling. The evolution of both was different, particularly after the recovery time. ST2 values exceeding cutoff values at any time.


Author(s):  
Claudio Ghermandi ◽  
Lucia Cipolat ◽  
Matteo Martignani ◽  
Luca Ansaloni ◽  
Federico Coccolini ◽  
...  

The aim was to investigate and analyze clinical outcomes in patients submitted to hyperthermic intraoperative chemotherapy (HIPEC) with open and closed technique. This is a retrospective analysis of data about 30 patients submitted to HIPEC with open coliseum technique-group 1 and closed technique-group 2 between may 2014 and may 2015. Clinical data about intra-operative monitoring of these patients during hyperthermic chemoperfusion were matched and compared. Statistical analysis was made by SPSS program. No statistical significant difference was found in the modification of cardiac frequency (P=0.136), of the median arterial pressure (P=0.128), in central venous pressure (P=0.384), cardiac output (P=0.092), and in Stroke Volume Variation (P=0.815) between the 2 groups. Recovery time in the Intensive Care Unit was 5±3 days for group 1 and 5±2 days for group 2. Recovery time was 17±6 days for group 1 and 20±11 days for group 2. There are no data confirming better outcomes of HIPEC with open or closed technique. An experienced operating team is required to decrease morbidity and mortality rate.


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