Dynamic Control of Nanoprecipitation in a Nanopipette

Studying the earliest stages of precipitation at the nanoscale is technically challenging but quite valuable as such phenomena reflect important processes such as crystallization and biomineralization. Using a quartz nanopipette as a nanoreactor, we induced precipitation of an insoluble salt to generate oscillating current blockades. The reversible process can be used to measure both kinetics of precipitation and relative size of the resulting nanoparticles. Counter ions for the highly water-insoluble salt zinc phosphate were separated by the pore of a nanopipette and a potential applied to cause ion migration to the interface. By analyzing the kinetics of pore blockage, two distinct mechanisms were identified: a slower process due to precipitation from solution, and a faster process attributed to voltage-driven migration of a trapped precipitate. We discuss the potential of these techniques in studying precipitation dynamics, trapping particles within a nanoreactor, and electrical sensors based on nanoprecipitation

One-year prevalence and the impact of migraine and tension-type headache in Turkey: a nationwide home-based study in adults

Several studies have shown that the prevalence of migraine and tension-type headache (TTH) varied between different geographical regions. Therefore, there is a need of a nationwide prevalence study for headache in our country, located between Asia and Europe. This nationwide study was designed to estimate the 1-year prevalence of migraine and TTH and analyse the clinical features, the impact as well as the demographic and socio-economic characteristics of the participant households in Turkey. We planned to investigate 6,000 representative households in 21 cities of Turkey; and a total of 5,323 households (response rate of 89%) aged between 18 and 65 years were examined for headache by 33 trained physicians at home on the basis of the diagnostic criteria of the second edition of the International Classification of Headache Disorders (ICHD-II). The electronically registered questionnaire was based on the headache features, the associated symptoms, demographic and socio-economic situation and history. Of 5,323 participants (48.8% women; mean age 35.9 ± 12 years) 44.6% reported recurrent headaches during the last 1 year and 871 were diagnosed with migraine at a prevalence rate of 16.4% (8.5% in men and 24.6% in women), whereas only 270 were diagnosed with TTH at a prevalence rate of 5.1% (5.7% in men and 4.5% in women). The 1-year prevalence of probable migraine was 12.4% and probable TTH was 9.5% additionally. The rate of migraine with aura among migraineurs was 21.5%. The prevalence of migraine was highest among 35–40-year-old women while there were no differences in age groups among men and in TTH overall. More than 2/3 of migraineurs had ever consulted a physician whereas only 1/3 of patients with TTH had ever consulted a physician. For women, the migraine prevalence was higher among the ones with a lower income, while among men, it did not show any change by income. Migraine prevalence was lower in those with a lower educational status compared to those with a high educational status. Chronic daily headache was present in 3.3% and the prevalence of medication overuse headache was 2.1% in our population. There was an important impact of migraine with a monthly frequency of 5.9 ± 6, and an attack duration of 35.1 ± 72 h, but only 4.9% were on prophylactic treatment. The one-year prevalence of migraine estimated as 16.4% was similar or even higher than world-wide reported migraine prevalence figures and identical to a previous nation-wide study conducted in 1998, whereas the TTH prevalence was much lower using the same methodology with the ICHD-II criteria

Reference isotherms for water vapor sorption on nanoporous carbon: results of an interlaboratory study

This paper reports the results of an international interlaboratory study sponsored by the Versailles Project on Advanced Materials and Standards (VAMAS) and led by the National Institute of Standards and Technology (NIST) on the measurement of water vapor sorption isotherms at 25 °C on a pelletized nanoporous carbon (BAM-P109, a certified reference material). Thirteen laboratories participated in the study and contributed nine pure water vapor isotherms and four relative humidity isotherms, using nitrogen as the carrier gas. From these data, reference isotherms, along with the 95% uncertainty interval (Uk=2), were determined and are reported in a tabular format

Prevalence of headache in Europe: a review for the Eurolight project

The main aim of the present study was to do an update on studies on headache epidemiology as a preparation for the multinational European study on the prevalence and burden of headache and investigate the impact of different methodological issues on the results. The study was based on a previous study, and a systematic literature search was performed to identify the newest studies. More than 50% of adults indicate that they suffer from headache in general during the last year or less, but when asked specifically about tension-type headache, the prevalence was 60%. Migraine occurs in 15%, chronic headache in about 4% and possible medication overuse headache in 1–2%. Cluster headache has a lifetime prevalence of 0.2–0.3%. Most headaches are more prevalent in women, and somewhat less prevalent in children and youth. Some studies indicate that the headache prevalence is increasing during the last decades in Europe. As to methodological issues, lifetime prevalences are in general higher than 1-year prevalences, but the exact time frame of headache (1 year, 6 or 3 months, or no time frame stated) seems to be of less importance. Studies using personal interviews seem to give somewhat higher prevalences than those using questionnaires

JOURNAL OF PLASTIC SURGERY AND HAND SURGERY

Eyelid reconstruction is a challenging surgical procedure because of the special function and structure of the eyelids. There are various useful techniques which can be used to reconstruct eyelid defects. In this report, the authors aimed to present the clinical results of angular artery-based island flap for the repair of the full thickness eyelid defects. This presented series consists of eight patients with full-thickness eyelid defects. Oncologic resection was the reason for all of them. Five of the patients had lower eyelid defects and the other three had upper eyelid defects. Nasojugal angular artery-based axial flap was used in reconstruction in all patients. The inferior limit of the flap was the alar rim level in order to make the flap totally axial. A tunnel was created under the orbicularis oculi muscle in cases where the medial portion of the eyelids was left intact and healthy. Septal chondromucosal graft was used to repair posterior lamella of the eyelid. The follow-up period of the cases was from 12 months to 22 months, with a mean follow-up period of 16 months. There was only one patient with reconstructed upper eyelid needed flap defatting. There was no ectropion or wound healing problem observed during the follow-up period. This presented series shows that angular artery-based axial flap and septal chondromucosal graft combination is a simple and safe technique for both upper and lower eyelid full-thickness defect reconstruction. The donor site of this flap heals with an inconspicuous scar concealed in the nasojugal area

metabolicimplication

This repository includes patients data obtained in the study named "The metabolic implication of the breast reduction surgery". It is a spss file

metabolicimplication

This repository includes patients data obtained in the study named "The metabolic implication of the breast reduction surgery". It is a spss file

Benign giant Schwannoma located in the upper arm

WOS: A1997XK12400019PubMed ID: 9229103A 72-year-old-female presented with a giant schwannoma on the medial side of her right upper arm. Ultrasonographic and magnetic resonance imaging examinations showed that it was almost a totally cystic lesion. It was initially misdiagnosed as a hydatid cyst. After excision of the tumor, histopathological examination revealed that it was a schwannoma composed of two types of regions known as Antoni A and B regions. The tumor was 15 x 8 x 7 cm in size. There were no neurological sequelae after the operation. This is probably the biggest schwannoma of the upper extremity reported