Skip to main content

Capturing water in deserted air to give people drinking

Penelitian - The World Water Council study says more than 1.1 billion people do not have access to safe drinking water around the world and many coastal areas prone to drought in remote areas have little or no rain and expensive water transport costs but have abundant fog that occur regularly. Two research teams presented a solution to solve this problem in two separate reports.

Harvesting the fog is a promising solution for providing clean water in areas close to the ocean where clouds of mist form on water and then transported by the wind. Mist consists of small droplets with a typical 10 μm diameter. Researchers have designed a variety of artificial fog harvesting systems, including mimicking the natural haze-gathering mechanisms in animals and plants.

Penelitian Capturing water in deserted air to give people drinking

The high humidity level and material developments to drive the harvester level are greater, but the real limiting factor with the device is the aerodynamic aberration that prevents droplets. Maher Damak and Kripa Varanasi at the Massachusetts Institute of Technology in Cambridge demonstrated the resolution of aerodynamic deviation problems.

This device can take more than 60 g of water from mist per hour on energy consumption of 2 kWh/m3 or lower energy cost than current reverse-osmosis desalination procedure. The catcher can also be used to capture steam from power plant chimneys where up to 150 million gallons of water per year. Damak and Varanasi have established the company for the purpose of commercializing the device.

To collect water from the air requires a material that will condense droplets and then be released. Omar Yaghi at the University of California at Berkeley and colleagues used a porous metal-organic framework MOF-801 - [Zr6O4(OH)4(fumarate)6], though some strength is still needed in the sunburned desert. Night temperature down in the desert will also help the absorption of water that can be released during hot days.

Yaghi and colleagues tested their devices in original desert conditions in Arizona and improved on prototypes that eliminated the need for external cooling sources. This device collects about 200 ml of water per kilogram per day in a night cycle and is cheaper on an aluminum base where the water captured can double.

Journal :

Maher Damak and Kripa K. Varanasi. Electrostatically driven fog collection using space charge injection, Science Advances, 08 Jun 2018, DOI:10.1126/sciadv.aao5323

Farhad Fathieh et al. Practical water production from desert air, Science Advances, 08 Jun 2018, DOI:10.1126/sciadv.aat3198



Cacing Mata Sapi Thelazia gulosa Menginfeksi Mata Manusia

Seorang wanita berusia 26 tahun merasakan sesuatu di mata kiri selama berhari-hari, tapi ini bukan bulu mata yang menyebalkan atau serangga yang menyemprotkan racun ke wajahnya. Seminggu setelah iritasi pertama, penduduk Oregon tersebut menarik cacing transparan panjang 1 sentimeter dari matanya.

Sebuah kasus kambuhan manusia pertama yang pernah dilaporkan tentang parasit mata sapi, Thelazia gulosa. Selama 20 hari, dia dan dokter menyingkirkan 14 cacing dari mata yang terinfeksi. Tim dokter melaporkan ke di American Journal of Tropical Medicine and Hygiene. Setelah itu tidak ada lagi sintom iritasi mata.

"Ini peristiwa sangat langka dan menarik dari perspektif parasitologis. Mungkin tidak begitu menyenangkan jika Anda pasiennya," kata Richard Bradbury, parasitolog di U.S. Centers for Disease Control and Prevention di Atlanta.

T. gulosa adalah nematoda di Amerika Utara, Eropa, Australia dan Asia Tengah. Mereka menginfeksi mata ternak yang besar dan menghabiskan tahap larva di …

Agama Mendidik Anak-Anak Menjadi Serakah

Penelitian ~ Agama membuat anak-anak tidak bermurah hati. Keyakinan agama memiliki pengaruh negatif pada altruisme dan kepekaan sosial atau daya empati. Meskipun penelitian ilmiah yang pernah dilakukan selalu dituduh bermuatan sentimen, temuan selalu konsisten bahwa orang-orang religius cenderung berbohong dan membesar-besarkan kegiatan amal.

Jangan khawatir karena ini bukan lelucon, tapi premis dimana agama membuat anak-anak yang polos menjadi serakah. Anak-anak ateis lebih murah hati dan kurang menghakimi dibanding anak beragama.

Anak-anak yang dibesarkan dari rumah tangga religius menghasilkan moral paling buruk dan suka menghakimi dibanding anak-anak yang dibesarkan dari keluarga non-religius.

Para ilmuwan dari 7 universitas mempelajari perkembangan moral 1.200 anak Islam, Kristen dan non-agama berumur 5 hingga 12 tahun di AS, Kanada, China, Yordania, Turki dan Afrika Selatan.

Komposisi anak adalah 24% Kristen, 43% Islam dan 27,6% non-agama. Jumlah Yahudi, Buddha, Hindu, agnostik …

Researchers built nanowire-microfluidic for sensitive and flexible bionic sensors

Penelitian - Researchers demonstrated multiscale nanowire-microfluidic hybrid strain sensors with high sensitivity and flexibility that could potentially serve as detectors for human movement and bionic ligaments in soft robotics. The sensor operates at low voltage and is capable of responding to various mechanical deformations for use in electronic systems for robotic wireless control.

In recent years, strain sensors have shown the potential for soft electronic applications to detect human body movements, health monitoring systems, and human-machine interactions. Strain sensors can also be useful for building human body parts, soft robotics and bionic robotics in the future.

Nanomaterials with low-dimensional morphology have been explored to improve the performance of strain sensors, but it remains difficult to achieve high stretchability and high sensitivity simultaneously. Chuan Liu from Sun Yat-Sen University in Guangzhou and colleagues designed the sensor strain of composite stru…

Crab spiders measure the wind before rolling balloons for flight

Penelitian - Spider flying uses nanoscale fibers to ride the wind. Scientists at Technische Universität Berlin reported to PLOS Biology about the take-off seconds that crab spiders (Xysticus spp) take off for flights over a gentle breeze by first feeling the wind and then spinning dozens of nano fibers up to seven meters.

Many types of spiders are involved in balloons to wander away from the birthplace, to find food or mating and to find new sites for colonization. Moonsung Cho and colleagues at the Technische Universität in Berlin gave first glimpse into the "bubbling" behavior that allowed certain spiders to travel in the wind for hundreds of kilometers.

"The pre-flight behavior suggests crab spiders are evaluating meteorological conditions before takeoff. Balloons may not be just a random launch into the wind, but those that occur when conditions support most productive travel," Cho said.

Crab spiders (Xysticus spp.) Measuring about 5 mm and weighing 25 milligra…

Biohybrid robots as cyborgs powered by living muscle tissue

The researchers created cyborgs by increasing the integration of living muscles into robots. A new field of biohybrid robotics involves the use of living tissues inside the robot, not just metals and plastics where muscles are one of the key potential components to provide driving force for movement and function.

Researchers at the University of Tokyo integrate live muscles into machines as a source of movement. The team developed a new method cultivated into individual muscle precursor cells from scratch into the sheet and then fully functioning into skeletal muscle tissue.

They incorporate these muscles into the skeleton of a biohybrid robot as an antagonist pair that mimics humans to achieve extraordinary motion and continue function for more than a week before the muscles become limp where the living cells die. The team reports to Science Robotics.

"We build muscles, we managed to use them as antagonistic pairs with one contraction and the other widened, just like in our body…