Share:What a drag! Fishing gear’s effects on whales

New research shows that removing some debris is better than doing nothing

BY 

ILIMA LOOMIS 

7:00AM, JANUARY 13, 2016

Whales that get tangled up in fishing lines and other gear can be stuck towing it around for months or years. And it’s not pleasant. Those lines can cut into the mammals’ flesh. Some whales will die from their injuries. But how does it actually feel to be carrying all that trash around? Researchers at the Woods Hole Oceanographic Institution, or WHOI, on the Massachusetts coast wanted to know what kind of weight or pull it exerted. They found that heavy traps and bulky buoys cause a whale to feel much more “drag” than will loose ropes. And it can tire them out.

The researchers’ interest had been piqued by a chance encounter with a two-year-old whale on Christmas Day in 2010. The young North Atlantic right whale was wrapped in fishing lines. It wasn’t easy, but the team eventually freed her of most of the debris. They were not in time, however. The whale was injured, exhausted and “so, so, so thin,” says Julie van der Hoop. She works at WHOI as a whale researcher. Freed of the gear, the whale dove deep and swam away. “Unfortunately, she didn’t survive,” van der Hoop says. The whale’s body washed ashore some time later in Florida.

Keep reading: https://student.societyforscience.org/article/what-drag-fishing-gear%E2%80%99s-effects-whales

Thermophilic Enzyme Isolated From Famous Hot Springs in South Sulawesi, Indonesia

Thermophiles and especially thermophilic enzymes have to date gained a great deal of interest both as analytical tools, and as biocatalysts for application in large scale.

By Muhammad Zakir

Being in the mountains, the atmosphere at Lejja Hot Springs in Soppeng feels much cooler. But do not imagine the water is icy cold because warm water will be found here. In fact, water from the hill that flows in some tributaries before it flowed into the swimming-pool could boil an egg until cooked grains for consumption. The water temperature reached 60 degrees Celsius, plus sulfur content, sulfur content in accordance with the results of the study reached 1.5 percent. Excess water from the hills is believed efficacious in Soppengwhich can cure various skin diseases and bone, such as rheumatism, tension in the muscles of the body, itching, up acne. The view at tourist sites is increasingly perfect baths with views of the spring that flows in between the slopes of the mountain of evidence around him.

Sampling location at Lejja Hot Springs in Soppeng Regency, 
Province of South Sulawesi, Indonesia

In this location, we have isolated a thermophilic bacteria that producing amylase.

Isolate of RSAII-1b at 50oC for48 h

Thermophilic bacteria are extremophiles; they live in the sorts of temperatures that would toast other organisms. Strictly speaking they are not bacteria, but members of a different branch of life known as Archaea.

Thermophilicbacterias(also known as thermostable enzymes and microorganisms) have been topics for much research during the last two decades, but the interest in thermophiles and how their proteins are able to function at elevated temperatures. Microorganisms are, based on their optimal growth temperatures, divided into three main groups, i.e. psychrophiles (below 20°C), mesophiles (moderate temperatures), and thermophiles (high temperatures, above 55°C). Only few eukaryotes are known to grow above this temperature, but some fungi grow in the temperature range 50 – 55°C. Most thermophilic bacteria characterised today grow below the hyperthermophilic boundary (with some exceptions, such as Thermotoga and Aquifex) while hyperthermophilic species are dominated by the Archaea.

Thermophiles and especially thermophilic enzymes have to date gained a great deal of interest both as analytical tools, and as biocatalysts for application in large scale. Utilization of these enzymes is however still today, despite many efforts, often limited by the cost of the enzymes. With an increasing market for the enzymes, leading to production in higher volumes, the cost is however predicted to decrease. Moreover, with a paradigm shift in industry moving from fossils towards renewable resource utilization, the need of microbial catalysts is predicted to increase, and certainly there will be a continued and increased need of thermostable selective biocatalysts in the future.

Paper link:
http://www.sciencepublishinggroup.com/journal/paperinfo?journalid=655&doi=10.11648/j.ajbls.20150306.13

Story source: http://bit.ly/1lh5LYp

Share:Spider uses paddlelike arms for safer sex

By Patrick MonahanJan. 13, 2016

How do you stay safe when a prospective mate may want to eat you? If you’re a male jumping spider, you might first make sure she wants to play. The males of the newly described Australian species Jotus remus cautiously woo mates by hiding behind leaves and sticking out their extended, paddle-shaped legs. As the female attacks these decoys, the male deftly avoids her, sometimes scuttling to the other side of the leaf to keep his distance. If she wants to mate, then she eventually stops—and that’s when the suitor makes his move. He gives two more vigorous shakes of his paddles, then flips to the female’s side of the leaf and mounts her in just over a second. Playing this game seems to allow the male to keep his distance while he makes sure his prospective mate is interested. And it works. As the authors report this month in Peckhamia, every single male they observed escaped without injury. Males of some other jumping spider species attract females with bright, colorful displays—for this species, it seems a little caution can go a long way.

Source: http://www.sciencemag.org

Computer Modeling for Science, Technology, Engineering and Mathematics Curriculum in Kenya: A Simulation-Based Approach to Science Education

Authors: James Sifuna, George Simiyu Manyali, Thomas Sakwa, Alima Mukasia

Abstract: Developed countries have appreciated the importance of Science, Technology, Engineering and Mathematics (STEM) for scientific and technological development. STEM subjects have been posting low results in the Kenya Certificate of Secondary Examinations over the years and we have linked the deteriorating standards to the inappropriate teaching approaches that mainly tend to be teacher-centered and hence compromising the learner-centered approach. Due to the poor teaching methods, we ought to incorporate simulation in science education to foster good grades and this formed the basis of this research. Computation techniques have been applied in many subject areas in tertiary institutions with promising results that tend to be in agreement with experimental data. Our research is a quasi-experimental study and thus we have employed the Solomon-Four-Quasi-Experimental design that enabled us to involve a comparison between two computational groups and two control groups. The control groups served to reduce the influence of confounding variables and allowed us to test whether the pre-test had an effect on our objective. Purposive sampling technique was used to select three schools (A boy school, a girl school and a mixed sex school). Each school was expected to have a computer for simulation. The three schools were further split into four groups (single boy’s school, single girl’s school, boys from the mixed and girls from the mixed school). Each school provided the form one class and a total of 150 students participated. We taught the concept of the periodic table to all the students, the computational groups were taught using the simulations while the control groups were taught using the regular methodology. After we had taught for a period of one month, all the four groups were tested using a tool verified by Kurder-Richardson 21 Formula and the data analyzed using t-test, ANOVA and Origin 9.0. The results showed that the computation groups posted higher scores in the concept of the periodic table. This research points to the fact that there is an urgent need to re-design the teaching of Science, technology, Engineering and Mathematics fields, by incorporating computation techniques to enhance STEMs.

Keywords: STEM, Simulation, Solomon-Four-Quasi- Experimental Design, Kurder-Richardson 21 Formula, T-test, ANOVA, Origin 9.0,Purposive Sampling

Read this scientific paper in Science Journal of Education.

The Secret To Staying Young May Be Having More Children

Researchers found a correlation between women giving birth to more children and longer caps of DNA strands –– an indicator of slowed aging. Video provided by Newsy

Story source: http://bit.ly/1RjDeiZ

Journal of Family Medicine and Health Care

Journal of Family Medicine and Health Care (JFMHC) is an international, English-language, peer-reviewed journal, publishing articles in different disciplines of family medicine/ general practice. It is published four times a year. JFMHC has set itself a major target of the literature of primary healthcare. Communication and experience is very important for the journal's scientific committee.

ISSN Print: 2469-8326 

ISSN Online: 2469-8342
http://www.sciencepublishinggroup.com/j/jfmhc

Journal of Family Medicine and Health Care publishes original research papers, case reports, reviews, letters to the editor, invited articles and clinical quizzes on all aspects of family medicine/ general practice. This journal is interested in all types that have been encountered in the discipline of family medicine. Subject areas may include, but not limited to following fields:

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Pediatrics

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Internal medicine

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Geriatrics

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Occupational medicine

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Smoking-alcohol-etc addiction

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Public health

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Surgical subjects

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Medical education

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Social issues

Share: Sharks smell their way home

Sharks are famous for sniffing out prey, but new research shows their keen sense of smell also helps them navigate, Smithsonian reports. Previously, researchers had noticed that scent-processing areas of the brain are larger in shark species that do a lot of navigating. To learn more, researchers caught 26 small leopard sharks near the California coast, plugged the nostrils of half of them, equipped them with acoustic transmitters, and released them several miles offshore. Sharks that could smell soon figured out the right direction, but those with plugged nostrils took more roundabout paths and didn’t make it as far home before their transmitters fell off, the researchers reported today in PLOS ONE. The researchers suspect that other shark species may also navigate by scent over short distances, though they probably use other cues to cross the open ocean. 

Story source: http://news.sciencemag.org/