Nocturnal lighting in animal research should be replicable and reflect relevant ecological conditions.

In nature, light is a key driver of animal behaviour and physiology. When studying captive or laboratory animals, researchers usually expose animals to a period of darkness, to mimic night. However, 'darkness' is often poorly quantified and its importance is generally underappreciated in animal research.

Going rogue: what scientists can learn about Twitter communication from "alt" government accounts.

The inauguration of President Trump in the United States led to the active restriction of science communication from federal agencies, resulting in the creation of many unofficial "alt" Twitter accounts to maintain communication. Alt accounts had many followers (, 15 accounts had > 100,000) and received a large amount of media attention, making them ideal for better understanding how differences in messaging can affect public engagement with science on microblogging platforms. We analyzed tweets produced by alt and corresponding official agency accounts to compare the two groups and determine if specific features of a tweet made them more likely to be retweeted or liked to help the average scientist potentially reach a broader audience on Twitter.

Anthropogenic Alteration of Flow, Temperature, and Light as Life-History Cues in Stream Ecosystems.

Life history events, from mating and voltinism to migration and emergence, are governed by external and historically predictable environmental factors. The ways humans have altered natural environments during the Anthropocene have created myriad and compounding changes to these historically predictable environmental cues. Over the past few decades, there has been an increased interest in the control temperature exerts on life history events as concern over climate change has increased.

Street lighting: sex-independent impacts on moth movement.

Artificial lights have become an integral and welcome part of our urban and peri-urban environments. However, recent research has highlighted the potentially negative ecological consequences of ubiquitous artificial light. In particular, insects, especially moths, are expected to be negatively impacted by the presence of artificial lights.

Artificial light and nocturnal activity in gammarids.

Artificial light is gaining attention as a potential stressor to aquatic ecosystems. Artificial lights located near streams increase light levels experienced by stream invertebrates and we hypothesized light would depress night drift rates. We also hypothesized that the effect of light on drift rates would decrease over time as the invertebrates acclimated to the new light level over the course of one month's exposure.

[Comparative evaluation of endoscopic hemostatic methods in gastroduodenal ulcer hemorrhage].

An experience with using various methods of endoscopic hemostasis for bleeding gastroduodenal ulcers is presented. The efficiency of different methods of arresting the bleedings depending on localization of the ulcer, place of the bleeding vessel and activity of the hemorrhage is discusses. The frequency of hemorrhages was shown to depend of the phase of the ulcer disease.

[Effects of Helicobacter pylori on the results of conservative surgery in duodenal ulcer].

Sixty-two patients with exacerbation of duodenal ulcer were tested for Helicobacter pylori (HP). Bacterial invasion was found in 54 out 62 patients (87%). The degree of bacterial dissemination, the physiological resistance of the tegmental epithelium, and granulocytic infiltration of the mucosa were studied one and three months after selective proximal vagotomy (SPV) in 16 patients with HP.

[A topographic anatomical basis to approaches for instrumental interventions in diseases of the organs of the retroperitoneal space].

Retroperitoneoscope was introduced through the 11 and 10 intercostal space by linea axillaris media and anterior Differences of the accesses between each other and between those in lumbocostal angle are statistically significant. The access to 11 intercostal space was proved to be the most convenient one for the examination of the entire kidney surface, while the one to 10 intercostal space-for the endoscopy of adrenals and caudal region of the pancreas. The caput of the pancreas may be examined both through 11 intercostal space and lumbocostal angle.

[Sphincter-sparing operations in perforated duodenal ulcers].

Operated on were 304 patients with perforative duodenal ulcer. The preference was given to the closure of an ulcer with selective proximal vagotomy. The follow-up of from 1 to 10 years has shown the excellent and good results in 92% of cases.

[Vagotomy in bleeding ulcer of the duodenum].

The authors have analyzed immediate and late results of the surgical treatment of 162 patients. Organ-preserving operations are thought to be inferior to parcimonious resections of the stomach with vagotomy in reliability of arrest of bleeding and prevention of recurrences. Sphincter-destroying operations are believed to be expedient if the ulcer can be technically dissected both at the height of bleeding and in the intermediate (cold) period.

[Secretion of free hydrochloric acid after organ-saving surgery for duodenal ulcer].

Secretory function of the operated stomach was studied in 188 patients after trunk and selective vagotomy with distal resection and pyloroplasty of various extent. Under conditions of vagotomy the preservation of the whole stomach essentially fails to increase residual secretion of free hydrochloric acid.