Prevalence of gestational diabetes in the United States and Canada: a systematic review and meta-analysis.

Background: An understanding of the prevalence of gestational diabetes mellitus among pregnant women is essential at local, national and international level so that appropriate health care interventions can be planned, financed and delivered.

Methods: A systematic review and meta-analysis of primary research reporting the prevalence of gestational diabetes mellitus in Canada or the United States were carried out according to Meta-analysis of Observational Studies in Epidemiology guidelines. Four electronic databases were systematically searched in June 2023 to identify articles that reported gestational diabetes mellitus prevalence using universal screening in pregnant women from eligible general population samples.

Machine learning and topological data analysis identify unique features of human papillae in 3D scans.

The tongue surface houses a range of papillae that are integral to the mechanics and chemistry of taste and textural sensation. Although gustatory function of papillae is well investigated, the uniqueness of papillae within and across individuals remains elusive. Here, we present the first machine learning framework on 3D microscopic scans of human papillae ([Formula: see text]), uncovering the uniqueness of geometric and topological features of papillae.

Influence of the Chemical Composition of Ceria Conversion Coatings, Sealed in Solution of NaHPO and Ca(NO), on the Corrosion Behavior of Aluminum.

The corrosion-protective influence of eco-friendly ceria conversion coatings deposited on Al-1050 alloy, additionally treated in mixed NaHPO and Ca(NO) solution, was studied. The main aim of this work was to investigate how the obtained mixed systems of coatings eliminates the negative role of cracks and pores on the surface formed after deposition only of ceria coating. For this purpose, the growth structure, main components and corrosion resistance of the so formed protective systems were investigated by SEM, EDS, XRD, XPS and electrochemical (PDP, Rp, etc.

Human motoneuron firing behavior and single motor unit F-wave.

In motor control studies, the F-wave (a recurrent discharge evoked by an axonal antidromic volley) widely used for obtaining information on motoneuron pool behavior. However, such F-wave using is a matter of discussion and still has been not validated experimentally. The aim of the present study was investigation of F-wave properties of single firing motor units (MUs) in healthy humans, the properties, which could give evidence for F-wave origin in motoneuron soma and, therefore, could be used for estimation of a relation between MU firing and motoneuron firing behavior.

The response to professor K.S. Tűrker on his "an opinion on the 'delayed spikes' in human motoneurons".

This is the response to Prof. Tűrker on his note "challenging" our hypothesis assuming the possibility of two modes of spiking (direct and delayed) evoked by Ia-afferent electrical stimulation in human firing motoneurones. Besides, we touch on some common questions about the most relevant, functionally significant, estimations of motoneuronal firing behaviour in human motor control.

Evidence of two modes of spiking evoked in human firing motoneurones by Ia afferent electrical stimulation.

Neurone firing behaviour is a result of complex interaction between synaptic inputs and cellular intrinsic properties. Intriguing firing behaviour, delayed spiking, was shown in some neurones, in particular, in cat neocortical neurones and rat pyramidal hippocampal neurones. In contrast, the similar spiking mode was not reported for animal spinal motoneurones.

Repetitive doublet firing in human motoneurons: evidence for interaction between common synaptic drive and plateau potential in natural motor control.

The firing behavior of spinal motoneurons (MNs) is a result of processing synaptic inputs by MN membrane properties, including plateau potentials, fundamentally explored in animals. However, there is much less data about a plateau potential role in human motor control. We explored human MN repetitive doublet firing during gentle isometric voluntary muscle contractions with the aim of revealing possible evidence for interaction between plateau potentials and common synaptic drive known as an important determinant of MN pool firing behavior.

An Unusual and Rare Case of Food-dependent Exercise-induced Anaphylaxis Caused by Ingestion of Potatoes.

Food-dependent exercise-induced anaphylaxis (FDEIA) is an unusual and under-recognized form of exercise induced anaphylaxis, which usually occurs if exercise takes place within a few hours after ingestion of sensitizing food, but in some cases may also arise if food follows the exercise. We report a case of a 31-year-old woman who presented to our Department with a history of repeated episodes of acute allergic reactions, triggered by physical activity, after consumption of various vegetables and legumes. This is the first described case of FDEIA in Bulgaria.

Excitability and firing behavior of single slow motor axons transmitting natural repetitive firing of human motoneurons.

Excitability of motor axons is critically important for realizing their main function, i.e., transmitting motoneuron firing to muscle fibers.

F-wave of single firing motor units: correct or misleading criterion of motoneuron excitability in humans?

Motoneuron excitability is a critical property for information processing during motor control. F-wave (a motoneuronal recurrent discharge evoked by a motor antidromic volley) is often used as a criterion of motoneuron pool excitability in normal and neuromuscular diseases. However, such using of F-wave calls in question.

Triplet firing origin in human motor units: emerging hypotheses.

A specific feature of motor unit (MU) firing behaviour is rhythmic trains of single discharges at low rate resulting from the prolonged motoneuronal afterhyperpolarization. However, some MUs exhibit occasional doublets with uniquely short interspike intervals (2.5-20.

Motor unit firing pattern: evidence for motoneuronal or axonal discharge origin?

In neuromuscular diseases, a fasciculation origin is disputed. In some reports, it was suggested that motor unit firing pattern alone is evidence for motoneuronal or axonal fasciculations; namely interspike intervals of approximately 5 ms (doublet intervals) provide evidence for the axonal firing. To clarify the reliability of the suggestion, we compared doublet intervals originated in motoneurons and their axons in healthy humans.

RESPONSE OF TRACHYDISCUS MINUTUS (XANTHOPHYCEAE) TO TEMPERATURE AND LIGHT(1).

The effects of different temperatures and light intensities on growth, pigments, sugars, lipids, and proteins, as well as on some antioxidant and proteolytic enzymes of Trachydiscus minutus (Bourr.) H. Ettl, were investigated.

Do cyanobacterial lipids contain fatty acids longer than 18 carbon atoms?

Fatty acids of twelve species of cyanobacteria grown under different photoautotrophic conditions were studied and their composition was compared with literature data of many other species. We have come to the conclusion that the lipids of cyanobacteria do not contain fatty acids with a chain longer than 18 carbon atoms. In our opinion, omission of an analytical procedure, i.

Repetitive doublet firing of motor units: evidence for plateau potentials in human motoneurones?

During voluntary muscle contraction, human motoneurones can exhibit specific discharge patterns: single and repetitive doublets. Delayed depolarization has been accepted as the mechanism underlying single doublets. Repetitive doublet firing has been studied much less and its controlling mechanisms remain obscure.

[Discharge frequency and excitability of human firing motoneurone].

The excitability of firing motoneurones activated by voluntary contraction of the flexor carpi ulnaris or tibialis anterior was tested by single excitatory Ia afferent volleys. In order to estimate the stimulation effects, the peri-stimulus time histograms of single motoneurones were plotted, and the firing indices were calculated. It was shown that the firing-frequency effect was absent within the range of 4-14 imp/s during testing by low-intensity excitatory volley.

[Clinico-anatomic characteristics of pancreatic cancer].

340 autopsy cases of pancreatic carcinoma from hospitals of St. Petersburg (1990-1991) and Petrozavodsk (1981-1990) have been studied (male/female proportion 1.1:1).

[The clinico-morphological characteristics of cancer of the extrahepatic bile ducts (an analysis of 52 autopsy cases)].

Autopsy records have been analysed for 52 fatal cases of extrahepatic bile ducts cancer. Primary cancer most frequently involved common bile duct (37 cases). Histologically, skirr was found in 1 case, small-cell cancer in 1 case, adenocarcinoma in 50 cases.

[The gastrostoma in esophageal cancer: complications and the times and causes of fatal outcomes].

Data of esophageal cancer patients autopsies for 1977-1986 were collected from hospitals of Leningrad and Petrozavodsk and subjected to analysis. Gastrostomy had been carried out in 255 out of 847 (29.1%) cases studied.