Effect of green tea extract in extender of Simmental bull semen on pregnancy rate of recipients

Susilowati, Suherni,Sardjito, Trilas,Mustofa, Imam,Widodo, Oky Setio,Kurnijasanti, Rochmah Asian Australasian Association of Animal Productio 2021 Animal Bioscience Vol.34 No.2

Objective: The aim of this study was to ascertain the effects of adding green tea extract (GTE) to skim milk-egg yolk (SM-EY) extender on both the quality of post-thawed bull semen and the pregnancy rates of the recipient cows. Methods: Twelve ejaculates from four Simmental bulls, aged 3 to 5 years and weighing 900 to 950 kg, were diluted SM-EY extender, added with 0, 0.05, 0.1, and 0.15 mg GTE/100 mL extender and then frozen. After four weeks storage in liquid nitrogen, the sperm were thawed and evaluated for viability, motility, intact plasma membrane (IPM), and DNA fragmentation. Meanwhile, the estrus cycles of 48 recipient cows were synchronized by intramuscular administration of a single injection of 5 mg prostaglandin F2α. Estrus cows were divided into four equal groups and inseminated artificially 18 to 20 h after the onset of estrus by using semen from each extender group. Pregnancy was diagnosed by measuring serum progesterone levels at 21 days, followed by transrectal palpation 90 days after insemination. Results: The findings revealed that adding 0.1 mg of GTE/100 mL extender produced the highest percentages of sperm viability (70.67%±1.75%), motility (69.17%±1.47%), and IPM (69.23%±1.21%) and the lowest percentage of DNA fragmentation (3.00%±0.50%). The pregnancy diagnosis revealed that all cows (36/36) inseminated using frozen semen in GTE addition extender were pregnant (pregnancy rate 100%), whereas the pregnancy rate of the control group was 83.33% (10/12). Conclusion: It may be concluded that 0.1 mg GTE/100 mL extender yields the best quality of spermatozoa and that all variants doses of GTE in extender produce a higher pregnancy rate among recipient cows.

Morphological and Anatomical Evaluation of Grafted Pinus

Arida Susilowati,Apri Heri Imam Wahyudi,Supriyanto,Iskandar Z Siregar 한국목재공학회 2016 목재공학 Vol.44 No.6

Morphological and anatomical evaluation of grafted P. merkusii have been undertaken to obtain the information about compatible and incompatible symptoms of 18 years old grafts based on morphological observation and microscopic analysis. Samples of compatible and incompatible grafts were obtained from previous research conducted by the Silviculture Departement Team in 1994. Result showed that compatible grafts have normal stem form and secondary growth (diameter growth), but some abnormality symptoms like undulated pattern of annual growth rings, phloem thickening and abnormality resin ducts in inner and middle parts of the union area occurred. Incompatible ones showed abnormality of the stem form, cortex-bark necrosis and swelling in the union area. Microscopic observation showed abnormality of all parts of the union, undulated pattern of annual growth rings, phloem thickening, abnormal resin ducts, low numbers and discontinuity of vascular elements in the union area.

Physical and Mechanical Properties of Local Styrax Woods from North Tapanuli in Indonesia

Apri Heri Iswanto,Arida Susilowati,Irawati Azhar,Riswan,Supriyanto,Joel Elpinta Tarigan,Widya Fatriasari 한국목재공학회 2016 목재공학 Vol.44 No.4

The objective of this research was to evaluate physical and mechanical properties of three species of Styrax woods from North Tapanuli in Indonesia. The woods were more than 15 years old. Physical properties such as specific gravity, green moisture content, and volume shrinkage were determined by the procedures based on BS-373 standard for small clear specimen. Furthermore, mechanical properties, including modulus of rupture, modulus of elasticity, compression parallel to grain and hardness were also tested according to the standard. Along the stem direction, the edge section had better properties compared with those near the pith section. And the base section had also better properties than upper section. Based on the specific gravity, all of the Styrax woods in this research were classified into III-IV strength classes. A good dimensional stability was demonstrated by the value of the tangential and radial ratio which reached one. With the consideration of the mechanical properties, Styrax woods were suitable use for raw materials of light construction, furniture and handy craft.

The Risk Factors for Musculoskeletal Symptoms During Work From Home Due to the Covid-19 Pandemic

Nasri Sjahrul Meizar,Susilowati Indri Hapsari,Hasiholan Bonardo Prayogo,Sitanggang Akbar Nugroho,Gede Jyotidiwy Ida Ayu,Satria Nurrachmat,Theofany Simanjuntak Magda Sabrina 한국산업안전보건공단 산업안전보건연구원 2023 Safety and health at work Vol.14 No.1

Background: Online teaching and learning extend the duration of using gadgets such as mobile phones and tablets. A prolonged usage of these gadgets in a static position can lead to musculoskeletal disorders (MSD). Therefore, this study aims to identify the risk factors related to musculoskeletal symptoms while using gadgets during work from home due to the COVID-19 pandemic. Method: A cross-sectional survey with online-based questionnaires was collected from the University of Indonesia, consisting of lecturers, students, and managerial staff. The minimum number of respondents was 1,080 and was defined by stratified random sampling. Furthermore, the dependent variable was musculoskeletal symptoms, while the independent were age, gender, job position, duration, activity when using gadgets, and how to hold them. Result: Most of the respondents had mobile phones but only 16% had tablets. Furthermore, about 56.7% have used a mobile phone for more than 10 years, while about 89.7% have used a tablet for less than 10 years. A multivariate analysis found factors that were significantly associated with MSD symptoms while using a mobile phone, such as age, gender, web browsing activity, work, or college activities. These activities include doing assignments and holding the phone with two hands with two thumbs actively operating. The factors that were significantly associated with MSD symptoms when using tablets were gender, academic position, social media activity, and placing the tablet on a table with two actively working index fingers. Conclusion: Therefore, from the results of this study it is necessary to have WFH and e-learning policies to reduce MSD symptoms and enhance productivity at work.

Poster Session : Structure-funtion analysis of eRf1 protein in yeast Saccharomyces cerevisiae

( Akhmaloka ),( P. E. Susilowati ),( Subandi ),( P Aditiawati ),( F. Madayanti ) 한국생화학분자생물학회 (구 한국생화학회) 2007 생화학분자생물학회 춘계학술발표논문집 Vol.2007 No.-

Radical Scavenging Activity of Kemenyan Resin Produced by an Indonesian Native Plant, Styrax sumatrana

( Asep Hidayat ),( Apri Heri Iswanto ),( Arida Susilowati ),( Henti Hendalastuti Rachmat ) 한국목재공학회 2018 목재공학 Vol.46 No.4

Kemenyan resin from Styrax sumatrana is a unique non-timber forest product (NTFP) native from Sumatera Island, Indonesia. It possesses a wide range of applications in the pharmaceutical, perfume, and cosmetics industries. In this paper, six kemenyan resin samples were investigated to evaluate their free radical scavenging activity using 1,1-diphenyl-2-picrylhydrazyl (DPPH) reagent. The kemenyan resin samples, which originated from North Tapanuli, Pakpak Bharat, and Humbang Hasundutan, showed high antioxidant activity with IC₅₀ < 16 mg/L. The antioxidant activity of common kemenyan resin constituents, i.e., cinnamic acid, ethyl cinnamate, gallic acid, and vanillin was also investigated as positive control, although they exhibited lower antioxidant activity (IC₅₀ < 1000 mg/L), except for gallic acid (IC₅₀ = 5,23 mg/L). The total phenolic and flavonoid contents (TPC and TFC) for all samples were 44-66 mg gallic acid equivalents (GAE)/g sample and 143-160 mg quarcetin equivalents (QE)/g sample. The results revealed that kemenyan resin has high potency as an antioxidant and could be used as a natural antioxidant resource.

The use of conversation fillers in English by Indonesian EFL Master’s students

Sri Wuli Fitriati,Januarius Mujiyanto,Endang Susilowati,Perwari Melati Akmilia 경희대학교 언어정보연구소 2021 언어연구 Vol.38 No.-

Fillers can be beneficial for English as a foreign language (EFL) learners and have many functions. Although fillers are useful in spontaneous speaking, some learners have not been aware of how and when to use fillers in spoken communication. Some research studies investigated the use of fillers by EFL learners, but none has focused on a casual conversation in English. This article reports on a study that aims at investigating and examining the types and functions of fillers produced by Master’s students of English as a foreign language (henceforth, EFL Master’s students). This group of learners is at the advanced level of English language learners, so it is necessary to look at their oral communication skills, such as casual conversations because this type of communication is relatively not easy for learners to engage. This is a qualitative case study that employs a conversation analysis. The participants are at a state university in Semarang, Indonesia. The data were collected from audio recordings which were then transcribed. The transcriptions were analyzed by using Rose’s (1998) theory of types of fillers and Stanstrom’s (1994) theory of functions of fillers. The findings reveal that: (1) the students frequently used lexicalized fillers, followed by unlexicalized ones. The dominant lexicalized filler is so, whereas the dominant unlexicalized filler is emm, and (2) Fillers produced by the students function as hesitation, empathizer, mitigation, time-creating devices, and editing term. The findings are further discussed with the theory of communicative competence. Finally, this article presents some pedagogical implications of this study on teaching speaking to learners of English as a foreign language.

< 구두-D-02 > Chemical Characteristic of Styrax sumatrana Wood from North Sumatra

( Apri Heri Iswanto ),( Yenni Suhaida Siregar ),( Arida Susilowati ),( Widya Fatriasari ) 한국목재공학회 2018 한국목재공학회 학술발표논문집 Vol.2018 No.1

The objective of this research was to analize chemical component of Styrax sumatrana wood from North Tapanuli and Pakpak Bharat according to stem vertical orientation. Samples for analysis divided into three part of stem (based, middle, and tip). Wood chemical component analysis consited of hollocelulose, α-cellulose, hemicellulose, Acid Soluble Lignin (ASL), Acid Insoluble Lignin (AIL), and non structural component (extractive content in ethanol benzene 1:2 and ash content) were observed. Result showed that growth location influence wood chemical component. The wood chemical component from North Tapanuli and Pak Pak Bharat were 52.72 and 69.80% (hollocelulose), 25.94 and 39.87% (α-cellulose), 26,78 and 29.92% (hemicellulose), 5.49 and 4.33% (Acid Soluble Lignin), 34.37 and 20.43% (Acid Insoluble Lignin), 10.95 and 2.42% (extractive content), and for ash content is 1.37 and 0.8%. Based on stem vertical orientation observation, generally the base position has the highest value of all observed parameters.

Wood Chemical Compositions of Raru Species Originating from Central Tapanuli, North Sumatra, Indonesia: Effect of Differences in Wood Species and Log Positions

( Apri Heri Iswanto ),( Fazilla Oktaviani Tarigan ),( Arida Susilowati ),( Atmawi Darwis ),( Widya Fatriasari ) 한국목재공학회 2021 목재공학 Vol.49 No.5

Raru is a lesser-known plant species originating from North Sumatra, Indonesia. Information on the characteristics is still limited, especially its chemical component. Therefore, this study aims to examine the chemical composition information of Cotylelobium lanceolatum, Cotylelobium melanoxylon, and Vatica pauciflora woods based on their axial log positions (bottom, middle, and top). The wood chemical analysis was performed in terms of the Indonesian National Standard (SNI) method. Furthermore, the analysis measured holocellulose, α-cellulose, hemicellulose, lignin content, alcohol benzene extractive content, the extractive substance in hot and water, and solubility in NaOH 1%. The results indicated that the species and their log axial positions affected different chemical components, which included α-cellulose, hemicellulose, and lignin of C. lanceolatum amounting to 41.88%, 19.39%, and 28.68% respectively. Meanwhile, for C. Melanoxylon, they were 42.01%, 21.11%, and 24.76% respectively; and for V. pauciflora wood, they were 42.95%, 23.24%, and 30.11% respectively. The average values of the extractive contents including the solubility in 1: 2 ethanol benzene, NaOH, and hot water for C. lanceolatum, C. melanoxylon, and V. pauciflora wood were (10.58%, 27.62%, 8.13%), (14.54%, 28.22%, 7.82%), and (10.95%, 28.60%, 7.57%) respectively. The wood species had a significant effect on chemical components including lignin, cellulose and hemicellulose, and extractive solubility in cold water. Furthermore, the axial log position had a significant effect on all the parameters of the chemical composition of the wood being tested.

Effect of Several Exterior Adhesive Types on Dimensional Stability of Bamboo Oriented Particleboard

Iswanto, Apri Heri,Munthe, Rensus,Darwis, Atmawi,Azhar, Irawati,Susilowati, Arida,Prabuningrum, Dita Sari,Fatriasari, Widya Materials Research Society of Korea 2019 한국재료학회지 Vol.29 No.5

The objective of this research is to evaluate the effect of adhesive types on dimensional stability of bamboo-oriented particleboard. The materials used in this research are bamboo tali(Gigantochloa apus J.A & J.H. Schult. Kurz), UF/MDI(8, 10, 12 % level), and MF, MDI, and PF at 7 % level. Particle and adhesive are mixed using a blending machine; then, mat forming and hot pressing processes are performed using adhesive-suitable temperature and time references. MDI resin is set at $160^{\circ}C$ temperature for 5 minutes. PF resin and MF resin are pressed at $170^{\circ}C$ for 10 minutes, and $140^{\circ}C$ for 10 minutes, respectively, while UF/MDI sets at temperature of $140^{\circ}C$ for 10 minutes. The results show that particleboard using PF resin produces the lowest thickness swelling value. The particleboard using UF/MDI resin also produces good response for thickness swelling value. Interesting things happen in that UF/MDI adhesive produces a thickness swelling value better than that of MDI resin. FTIR analysis on particleboard bonded by UF/MDI resin combination shows the presence of carbonyl group C=O vibration on multi substitution of urea at wave number of around $1,700cm^{-1}$.