Recent Advances in Regenerative Tissue Fabrication: Tools, Materials, and Microenvironment in Hierarchical Aspects

As part of regenerative medicine, artificial, hierarchical tissue engineering is a favorable approach to satisfy the needs of patients for new tissues and organs to replace those with defects caused by age, disease, or trauma or to correct congenital disabilities. However, the application of tissue engineering faces critical issues, such as the biocompatibility of the fabricated tissues and organs, the scaffolding, the complex biomechanical processes within cells, and the regulation of cell biology. Although fabrication strategies, including the traditional bioprinting, photolithography, and organ‐on‐a‐chip methods, as well as combinations of fabrication processes, face many challenges, they are methods that can be used in hierarchical tissue engineering. The strategic approach to synthetic, hierarchical tissue engineering is to use a combination of several technologies incorporating material science, cell biology, additive manufacturing (AM), on‐a‐chip strategies, and biomechanics. Herein, in a review, the current materials and biofabrication strategies of various artificial hierarchical tissues are discussed based on the level of tissue complexity from nano to macrosize and the adaptive interactions between cells and the scaffolding surrounding the incorporated cells

Inkjet-Printed Carbon Nanotubes for Fabricating a Spoof Fingerprint on Paper.

A spoof fingerprint was fabricated on paper and applied for a spoofing attack to unlock a smartphone on which a capacitive array of sensors had been embedded with a fingerprint recognition algorithm. Using an inkjet printer with an ink made of carbon nanotubes (CNTs), we printed a spoof fingerprint having an electrical and geometric pattern of ridges and furrows comparable to that of the real fingerprint. With this printed spoof fingerprint, we were able to unlock a smartphone successfully; this was due to the good quality of the printed CNT material, which provided electrical conductivities and structural patterns similar to those of the real fingerprint. This result confirms that inkjet-printing CNTs to fabricate a spoof fingerprint on paper is an easy, simple spoofing route from the real fingerprint and suggests a new method for outputting the physical ridges and furrows on a two-dimensional plane

Effect of Calcium Supplementation During Pregnancy in Maternal Patient to Preterm Birth in One of Private Hospitals in Yogyakarta

Calcium is one of micronutrients that plays an important role in pregnancy. Insufficient consumption of calcium in pregnant women could lead to preterm birth, which is a major cause of neonatal mortality. This study aimed to determine the maternal patients’ characteristics, relationship between prematurity risk factors such as age, antenatal care, history of abortion and parity as well as calcium supplementation during pregnancy on pregnant women toward preterm birth in one of private hospitals in Yogyakarta. The survey was conducted from May to August 2016 The study was an analytical observation with cross‑sectional research design. In total of 199 medical records of maternal patients that had been included were analyzed using Mann‑Whitney and Chi‑Square test to see the relationship of calcium supplementation to preterm birth. Fisher’s exact test was used if Chi‑Square’s requirement was not fulfilled. The pregnant women’s characteristics in the hospital were expectant mothers with normal gestational age (93%); insufficient calcium supplementation (79%); age ≤30 years (61%); bachelor’s degree (53%); private employees (40%); antenatal care ≥4 (98%) and parity 1 and ≥4 (54%). The result of this study showed there was no relationship between age, antenatal care, history of abortion and parity as well as calcium supplementation toward preterm birth on pregnant women in one of private hospitals in Yogyakarta

Inkjet-Printed Carbon Nanotubes for Fabricating a Spoof Fingerprint on Paper

A spoof fingerprint was fabricated on paper and applied for a spoofing attack to unlock a smartphone on which a capacitive array of sensors had been embedded with a fingerprint recognition algorithm. Using an inkjet printer with an ink made of carbon nanotubes (CNTs), we printed a spoof fingerprint having an electrical and geometric pattern of ridges and furrows comparable to that of the real fingerprint. With this printed spoof fingerprint, we were able to unlock a smartphone successfully; this was due to the good quality of the printed CNT material, which provided electrical conductivities and structural patterns similar to those of the real fingerprint. This result confirms that inkjet-printing CNTs to fabricate a spoof fingerprint on paper is an easy, simple spoofing route from the real fingerprint and suggests a new method for outputting the physical ridges and furrows on a two-dimensional plane