Carboxymethyl chitosan: Properties and biomedical applications.

Staphylococcus aureus (S. aureus) is considered by the World Health Organization as a high priority pathogen for which new therapies are needed. This is particularly important for biofilm implant-associated infections once the only available treatment option implies a surgical procedure combined with antibiotic therapy. Consequently, these infections represent an economic burden for Healthcare Systems. A new strategy has emerged to tackle this problem: for small bugs, small particles. Here, we describe how nanotechnology-based systems have been studied to treat S. aureus biofilms. Their features, drawbacks and potentialities to impact the treatment of these infections are highlighted. Furthermore, we also outline biofilm models and assays required for preclinical validation of those nanosystems to smooth the process of clinical translation.

Impact of nanosystems in Staphylococcus aureus biofilms treatment.

Recent advances in functionalized nanomaterials for the diagnosis and treatment of bacterial infections.

A comparative study on synthesis of AgNPs on cellulose nanofibers by thermal treatment and DMF for antibacterial activities.

Rapid endothelialization and prevention of restenosis are two vital challenges for the preparation of a small-diameter vascular graft (SDVG), while postoperative infection after implantation is often neglected. In the present study, carboxymethyl chitosan (CMC) and chitosan (CS) were chosen as the anti-thrombotic and anti-bacterial components, respectively; and then an asymmetric vascular graft was fabricated by co-electrospinning of poly(e-caprolactone) (PCL)/CMC and PCL/CS. The mechanical properties of the asymmetric vascular graft were much better than those of the native vessels. In vitro blood compatibility tests indicated that the inner layer of the graft could inhibit thrombosis effectively. The outer layer of the graft had a certain anti-bacterial effect owing to the addition of chitosan. Besides, the inner layer of the graft could greatly promote the growth of endothelial cells. It is believed that the asymmetric SDVG with anti-thrombotic and anti-bacterial functions could contribute to the future clinical implantation of tissue engineered vascular grafts.

A chitosan modified asymmetric small-diameter vascular graft with anti-thrombotic and anti-bacterial functions for vascular tissue engineering

Silver deposited carboxymethyl chitosan-grafted magnetic nanoparticles as dual action deliverable antimicrobial materials.

Constitutive expression of recombinant human hyaluronidase PH20 by Pichia pastoris

West Sumatra has several breeds of germplasm ducks that have good potential for breeding, including Bayang Ducks, Kamang ducks, Pitalah ducks, and Sikumbang Janti ducks. This type of duck develops in the origin area to produce eggs and meat. The diversity of the performance of these ducks is still high. This study aims to determine the performance of various West Sumatra female ducks during the starter period. One hundred twenty heads of local female ducks were used in this study. This study used an experimental method of Completely Randomized Design (CRD) with four treatments and five replicates; each cage unit consisted of 6 ducks. The treatments in this study consisted of four breeds of local female ducks from West Sumatra, namely A (Bayang duck), B (Kamang duck), C (Pitalah duck), and D (Sikumbang Janti ducks). This study showed that four breeds of local female ducks in West Sumatra had no significant effect (P>0.05) on feed consumption and body weight gain. In comparison, four breeds of local female ducks in West Sumatra significantly affected feed conversion (P<0.05). The feed conversion for Bayang, Sikumbang janti, Kamang, and Pitalah ducks was 4.60, 4.89, 4.60, 4.38, and 4.29. Based on the feed conversion, female Pitalah ducks were more efficient than others.

Performance of various types of West Sumatera female ducks at starter period

Language is a basic tool of human communication, and listening is one of the four important language skills that allow a person to receive, comprehend, and react to a certain piece of information accordingly. Various multimedia applications have been created to improve students’ English listening skill, such as eBelajar Kota Banda Aceh. However, little is known about the perceptions of students regarding the effectiveness of eBelajar in improving students’ listening skill and the obstacle they face when using this application. Thus, this research attempted to investigate these issues. Seventy-six students were involved as research participants, consisting of 33 female students and 43 male students, selected through a random sampling technique. The data were collected using questionnaires and analyzed using the percentage formula. The results showed that the students perceive eBelajar Kota Banda Aceh as an effective platform to learn English listening skill, but it occasionally presents a challenge for the students when using it, which is its high dependency on the internet connection and speed. Keywords: Ebelajar, Learning English, Listening Skill, Kota Banda Aceh

The Effectiveness of Learning Listening Using e-Belajar Kota Banda Aceh

In 2020, mankind is faced with a pandemic problem. If preventive efforts have been made and the covid-19 virus still infected humans, the last step that can be done against the virus is human immunity. So, efforts to increase immunity need to be done, especially during the pandemic. Immunity is related to optimum nutrition. However, optimal nutrition will not be achieved if the related factors are not achieved as well. Therefore, researchers were interested in conducting research to see the knowledge profile of balanced nutritions and stress level as one of the factors in achieving best nutrition during the pandemic. The aim of this study was to determine the knowledge profile of balanced nutrition and stress levels with a sample of health science students at Unsika (Singaperbangsa Karawang University) during the pandemic. This analysis design was a combination of quantitative and qualitative exploration. It was determined purposively and conducted in November-December 2020. From the results of the inquiry, it is known that the profile picture of balanced nutrition knowledge during the pandemic of Unsika Students; 35% of respondents had less intelligence, 61% of the survey participants had moderate insight, and only 4% had a good one. Based on this experiment, it is also known that students got a lot of information from the internet (websites/ articles/ popular social media). An overview of the stress level of Unsika Students; were 35% of respondents at normal stress level, 14% of the samples had mid stress stage, 27% considered as moderate stress phase, 20% included in severe stress class, and 4% got very heavy stress one. The causes of the stress during the pandemic included a slumping economic situation, due to task deadlines and lack of understanding of learning materials, loneliness, boredom, fear of infection of the virus and other personal reasons.

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Sabrina Sabrina

Papers

Silver deposited carboxymethyl chitosan-grafted magnetic nanoparticles as dual action deliverable antimicrobial materials.

Constitutive expression of recombinant human hyaluronidase PH20 by Pichia pastoris

Performance of various types of West Sumatera female ducks at starter period

The Effectiveness of Learning Listening Using e-Belajar Kota Banda Aceh

Balanced Nutritional Knowledge Profile and Stress Factors for Karawang Health Science Students during Pandemic