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The optimal timing of anticoagulation for patients with acute ischaemic stoke with atrial fibrillation is uncertain. We investigated the efficacy and safety of early compared with delayed initiation of direct oral anticoagulants (DOACs) in patients with acute ischaemic stroke associated with atrial fibrillation.

The article focuses on the high number of South Korean retail investors purchasing stocks from electric-car manufacturer Tesla. Topics discussed include the increase in the combined holdings of Tesla's stocks by South Koreans throughout the pandemic, factors contributing to this trend, the role of the high housing prices of South Korea in this trend, and the issues facing Tesla.

(Bloomberg) -- Hong Kong will relax some Covid-19 testing requirements for incoming passengers as the city takes small steps toward easing travel restrictions. Hong Kong lifted a ban on non-residents coming to the city from the start of May but still requires inbound passengers to quarantine for at least seven days after their arrival. [Extracted from the article]

The technique of Fourier transform infrared evolved gas analysis described previously has been expanded both with respect to data processing options and to application areas. In this paper several of these additional options and applications are described. For improved qualitative and quantitative capabilities, smoothing and integration have been found beneficial. The use of interferometric processing permits compound specific profiles to be generated quickly. By considering reaction properties, the operations of spectral subtraction and factor analysis can be shown to yield information on both reaction stoichiometries and the number of reactions occurring vs temperature. In the area of applications, the examination of polymer chain length, functional group analysis, and intermolecular interactions are discussed.

Thermal analysis plays an important role in the evaluation and development of many complex chemical systems. Often combustion data as well as pyrolytic data on these systems may be important. Analytical techniques are required which maximize the amount of useful information which can be obtained per thermal experiment. Fourier transform infrared spectral analysis of gases evolving from materials vs temperature can provide information on both pyrolysis and combustion processes, and an apparatus for performing such analysis routinely is described. While the Fourier transform infrared evolved gas analysis (FT-IR-EGA) system has numerous applications, three applications using tobacco as a sample are presented for illustration. These include comparison of different materials, comparison of materials before and after modification and examination of oxygen-induced effects relative to pyrolysis effects. The FT-IR-EGA technique should prove to be a useful tool in elucidating thermal processes in complex systems.

Presents information on the several species of triggerfishes found in the Red Sea. How triggerfishes are classified; Description of triggerfishes; Suggestions to follow for selection; General information on the habitat, behavior and feeding habits of triggers. INSET: Red Sea tigger species..

Looks at the inclusion of red algae in aquariums. Reason why most aquarists avoid algae; Size and growth patterns of algae; Information on the habitat of red algae; Physical description of algae.

Features the Kyphosidae which are commonly known as rudderfishes and are part of the sea chub family. How these fish got their names; Description of these fish; Classification of the rudderfish; Indication that these fish are found mainly in the Atlantic and Pacific Oceans.

Focuses on the Acanthurus sohal, a Red Sea clown surgeonfish of the Acanthuroidei family. Classification of the fish; Factors influencing the choice of the fish; Information concerning the feeding of the sohal.

Features the fish family of monos. Species under its two genera; Shape and size; Habitat; Chemical and physical conditions; Filtration; Maintenance; Territoriality; Acclimation; Prey relations; Feeding and nutrition; Diseases.

Features a variety of lionfishes. Classification; Physical characteristics; Habitat; Size; Selection; Behavior; Environmental needs; Chemical needs; Territoriality; Display; Acclimation; Predator/prey relations; Reproduction; Nutrition; Diseases.

Offers advice on the maintenance of aquatic ponds for spring. Major planning schemes; Pond structures and mechanicals; Household activities for pond maintenance; Various plants and fishes found in ponds; Other considerations for pond maintenance.

Describes the Freshwater Stingrays of the Family Potamotrygonidae. Classification; Physical descriptions; Environmental conditions; Behavioral patterns; Nutrition; Means of protection; Sexual reproduction.

Describes the butterflyfishes found in the Red Sea. Includes Chaetodon auriga; Chaetodon melannotus; Chaetodon mesoleucos; Chaetodon paucifasciatus; Forcipiger flavissimus; Heniochus intermedius; Heniochus diphreutes.

Describes the snapper tropical fish. Various classifications; Natural habitat; Behaviors; Physical features; Nutrition; Sexual reproduction; Environmental conditions; Diseases; Means of protection.

Describes the group of tropical and subtropical marine damselfishes. Classification; Physical features; Behaviors; Nutrition; Natural habitat; Environment; Sexual reproduction; Disease; Means of protection.

Describes the family of basses which belongs to the genus cephalopholis. Characterizations; Physical features; Natural habitat; Behavioral patterns; Nutrition; Sexual reproduction; Diseases; Classification.

Features the fish family of Scatophagidae commonly known as dung eaters. Food choices; Behavioral characteristics; Types of genera and species; Index of fitness; Increase on its cost due to the large incidental losses in their handling; Habitat; Acclimation; Predator/prey relations; Reproduction; Foods and feeding; Diseases; Tips in handling.

Focuses on hogfishes, wrasses of the genus Bodianus. Classification of the hogfish species; Range; Size; Criteria for the selection of hogfishes; Behavior; Acclimation; Tolerance for standard fish-tank-only conditions; Predator/prey relations; Reproduction; Foods and feeding; Disease.

Describes the Chaetodontidae butterflyfish members and offers tips on their selection for the aquariums. Classification; Avoiding fish showing any reddening at the mouth; Avoiding the buying of pairs of a given species; Collection; Environmental conditions to consider in making as an aquarium fish; Behavior; Acclimation; Foods and feeding; Reproduction; Diseases.

Focuses on the jawfish, Opistognathus rosenblatti. Characteristic features and classifications; Distinctive traits separating them from other perciforms; Opistognathus aurifrons as one of the popular aquarium fishes collected in the western Atlantic; Habitat; Acclimation; Territoriality; Diseases.

Discusses the ecological behaviors of various species of catfishes. Different types of catfishes; Classification; Physical features; Environmental conditions; Nutrition; Means of protection; Diseases; Sexual reproduction; Habitat.

Presents an introduction to squirrelfishes. Classification; Range; Size; Selection of species suitable for captive conditions; Environmental conditions; Behavior; Feeding and nutrition; Diseases.

Provides an overview of information about sharks as well as tips on its captive care. Classification; Size; Selection; Range; Description of coldwater specimens; Distinction of real sharks; Safety and handling; Choice for good captive shark species; Environmental conditions; Behavior and biology; Feeding and nutrition; Disease treatment. INSET: Did you know? (information on the whale shark)..

Discusses information about the French angelfish, Pomacanthus paru. Range; Classification; Environment; Behavior; Feeding; Disease; Further reading. INSETS: Did you know? (information on sibling species).;Did you know? (information on sponges)..

Focuses on the quality of the powder brown tang surgeonfish, Acanthurus coeruleus. Classification of the fish based on its structure; Geographic distribution of the fish in the wild; Discussion of the fish's territorial behavior.

Focuses on the characteristics of nudibranchs. Classification and variety of the organism; Problems in keeping nudibranchs in the aquarium; Tips for selecting nudibranchs.

Focuses on the breeding of reef fishes, Scaridae. History; Foods and feeding; Aquariogenic stress; Sexual behavior.

Features the Pacific double-saddle butterflyfish, Chaetodon ulietensis, as an aquarium fish. Identification and taxonomy; Selection of healthy fish; Environmental conditions; Behavior; Aquarium tank introduction and acclimation; Reproductive behavior and requirements; Foods and feeding; Illnesses.

Features the yellow longnose butterflyfishes, a variety of aquarium fishes belonging to the Forcipiger family. Classification; Range; Size; Selection; Habitat; Behavior; Food habits.

Features the Cortez angel, king angel, and clarion angel fishes from the Gulf of California or the Sea of Cortez. Habitats; Behavior; Nutrition; Sizes; Selection; Aquarium care; Disease.

Features the black-nosed butterflyfish, `Pseudochaetodon nigrirostris,' found in Mexico's Pacific coast. Classification; Tips on selecting; Aquarium conditions; Behavior.

Focuses on the conscientious and appropriate marine aquarium fish collecting. Need for more information regarding appropriate livestock; Effect of species removal from a marine ecosystem; Cleaner wrasses.