• The Variability of Expiration Peak Flow of Workers Employed in the Washing Installation (Laundry) of Haji Adam Malik General Hospital Medan 

  Saragih, W; Tarigan, Amira Permatasari; Nainggolan, N; Eyanoer, P C (Universitas Sumatera Utara, 2018)

  Laundress in hospitals is very susceptible to respiratory disorders, especially occupational asthma. To investigate the occurrence of an obstruction, the daily Expiration Peak Flow (EPF) examination was carried to compare ...

• The Impact of Upper Limb Training with Breathing Maneuver in Lung Function, Functional Capacity, Dyspnea Scale, and Quality of Life in Patient with Stable Chronic Obstructive of Lung Disease 

  Tarigan, Amira Permatasari; Ananda, Fannie Rizki; Pandia, Pandiaman; Sinaga, Bintang YM; Maryaningsih, Maryaningsih; Anggriani, Anggriani (Universitas Sumatera Utara, 2019)

  BACKGROUND: Exercise tolerance is one of the main impacts of COPD. COPD patients often experience dyspnea and fatigue after doing daily activities using their limb parts, even in simple thing such as lifting or grooming. ...

• The Correlation between Levels of Transforming Growth Factor-β with Pulmonary Fibrosis in Post Pulmonary Tuberculosis in Medan, North Sumatera – Indonesia 

  Christine, Tamara; Tarigan, Amira Permatasari; Ananda, Fannie Rizki (Universitas Sumatera Utara, 2019)

  BACKGROUND: Untreated or undertreated, pulmonary tuberculosis could cause severe complications until death. After treatment, residual lesions might occur. The presence of residual lesions is varied, including fibrosis, cavity, ...

• Obstructive Lung Disease as a Complication in Post Pulmonary TB 

  Tarigan, Amira Permatasari; Pandia, P; Eyanoer, P; Tina, D; Pratama, R; Fresia, A; Tamara; Silvanna (Universitas Sumatera Utara, 2018)

  The case of post TB is a problem that arises in the community. Pulmonary tuberculosis (TB) can affect lung function. Therefore, we evaluated impaired pulmonary function in subjects with diagnosed prior pulmonary TB. A ...

• Impact of Lower-Limb Endurance Training on Dyspnea and Lung Functions in Patients with COPD 

  Tarigan, Amira Permatasari; Pandia, Pandiaman; Mutiara, Erna; Pradana, Andika; Rhinsilva, Ella; Efriyandi, Efriyandi (Universitas Sumatera Utara, 2018)

  BACKGROUND: Patients with chronic obstructive pulmonary disease (COPD) exhibit persistent dyspnea in daily activities and irreversible airflow obstruction. These will finally lead to an inability to carry on daily activities ...

• Morphological and Anatomical Evaluation of Grafted Pinus merkusii 

  Susilowati, Arida; Iswanto, Apri Heri; Wahyudi, Imam; Supriyanto; Siregar, Iskandar Z (Universitas Sumatera Utara, 2016)

  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 ...

• The Kraft Pulp And Paper Properties of Sweet Sorghum Bagasse (Sorghum bicolor L Moench) 

  Fatriasari, Widya; Supriyanto; Iswanto, Apri Heri (Universitas Sumatera Utara, 2015)

  This study investigated the potency of sweet sorghum (Sorghum bicolor) bagasse as raw material for pulp and paper using kraft pulping. The effects of alkali and sulfidity loading on kraft pulp and paper properties were ...

• The Physical, Mechanical and Durability Properties of Sorghum Bagasse Particleboard by Layering Surface Treatment 

  Iswanto, Apri Heri; Aritonang, Wulandhari; Azhar, Irawati; Supriyanto; Fatriasari, Widya (Universitas Sumatera Utara, 2017)

  The decrease of wood supply leads to find out the alternative raw material for particleboard production derived from non-woody cellulose materials, one of the promising material is sorghum bagasse. However, the strength ...

• Effect of Wood Shaving to Improve the Properties of Particleboard Made from Sorghum Bagasse 

  Iswanto, Apri Heri; Azhar, Irawati; Susilowati, Arida; Supriyanto; Ginting, Andrianta (Universitas Sumatera Utara, 2016)

  The objective of this research was to evaluate the effect of wood shaving added to improve the mechanical properties of particleboard. Wood types were using in this research included of Meranti, Cempedak, Mahagony, and ...

• Effect of Pre-treatment Techniques on Physical, Mechanical and Durability Properties of Oriented Strand Board Made from Sentang Wood (Melia excelsa Jack) 

  Iswanto, Apri Heri; Febrianto, Fauzi; Wahyudi, Imama; Hwang, Won-Joung; Lee, Seon–Hwa; Kwon, Jin–Heon; Kwon, Sung–Min; Kim, Nam–Hun; Kondo, Tetsuo (Universitas Sumatera Utara, 2010)

  Sentang wood (Melia excelsa Jack) is one of the promoting fast growing tree species that can be introduced in timber estates and community forest in Indonesia. The objective of this research was to evaluate physical, ...

• Effect of Particle Pre-Treatment on Properties of Jatropha Fruit Hulls Particleboard 

  Iswanto, Apri Heri; Febrianto, Fauzi; Hadi, Yusuf Sudo; Ruhendi, Surdiding; Hermawan, Dede; Fatriasari, Widya (Universitas Sumatera Utara, 2018)

  The objective of the research was to evaluate the effect of particle pre-treatment on physical, mechanical, and durability of jatropha fruit hulls (JFH) particleboard. The pre-treatments included were immersing in cold ...

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

  Iswanto, Apri Heri; Susilowati, Arida; Azhar, Irawati; Riswan; Supriyanto; Tarigan, Joel Elpinta; Fatriasari, Widya (Universitas Sumatera Utara, 2016)

  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 ...

• Physical and Mechanical Properties of Three-layer Particleboards Bonded With UF and UMF Adhesives 

  Iswanto, Apri Heri; Simarmata, Janrahman; Fatriasari, Widya; Azhar, Irawati; Sucipto, Tito; Hartono, Rudi (Universitas Sumatera Utara, 2017)

  A low dimensional stability and poor bending strength properties were main problems in particleboard manufacturing. The objective of this research was to evaluate the effect of mixed wood species and urea-formaldehyde (UF) ...

• Effect of Resin Type, Pressing Temperature and Time on Particleboard Properties Made from Sorghum Bagasse 

  Iswanto, Apri H; Azhar, Irawati; Supriyanto; Susilowati, Arida (Universitas Sumatera Utara, 2014)

  Sorghum bicolor L Monech part Numbu as potential materials for particleboard manufacturing due to its cellulose, hemicellulose and lignin content similar with wood. The objective of the research was to determine the ...

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

  Hidayat, Asep; Iswanto, Apri Heri; Susilowati, Arida; Rachmat, Henti Hendalastuti (Universitas Sumatera Utara, 2018)

  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. ...

• Morphological Characteristics of Bambusa vulgaris and the Distribution and Shape of Vascular Bundles therein 

  Darwis, Atmawi; Iswanto, Apri Heri (Universitas Sumatera Utara, 2018)

  Bamboo culm comprises internodes and nodes and is tapered from the bottom to the top. Anatomically, bamboo culm comprises vascular bundles and parenchymal base tissue. The gross anatomical structure of a transverse ...

• Variation in Chemical Constituent of Styrax Sumatrana Wood Growing at Different Cultivation Site in North Sumatra, Indonesia 

  Iswanto, Apri Heri; Siregar, Yenni Suhaida; Susilowati, Arida; Darwis, Atmawi; Hartono, Rudi; Wirjosentono, Basuki; Rachmat, Henti Hendalastuti; Hidayat, Asep; Fatriasari, Widya (Universitas Sumatera Utara, 2019)

  Iswanto AH, Siregar YS, Susilowati A, Darwis A, Hartono R, Wirjosentono B, Rachmat HH, Hidayat A, Fatriasari W. 2019. Variation in chemical constituent of Styrax sumatrana wood growing at different cultivation site in North ...

• Passion Fruit Hulls Particleboard: The Effect of Urea Formaldehyde Level on Physical and Mechanical Properties 

  Iswanto, Apri Heri; Sucipto, T; Adlina, E; Prabuningrum, D S (Universitas Sumatera Utara, 2018)

  The purpose of this research was to explore the suitability of Passion Fruit Hulls (PFH) as a raw material particleboard with variants of urea formaldehyde adhesive content (UF). In this research, PFH particles filtered ...

• Oriented Particleboard Made from Tali Bamboo (Gigantochloa Apus): Effect of Particle Length on Physical and Mechanical Properties 

  Iswanto, Apri Heri (Universitas Sumatera Utara, 2018)

  Strength properties are one of the problems of particleboard. The objective of this research was to analyze the effect of particle length on physical and mechanical properties oriented particleboard (OPB). The variation ...

• Jatropha Fruit Hulls (JFH) Particleboard: Effect of Acetic Acid Treatment and Ratio of JFH and Non-Wood particles 

  Iswanto, A H; Febrianto, F; Hadi, Y S; Ruhendi, S; Hermawan, D (Universitas Sumatera Utara, 2018)

  The objective of the experiment was to analize the effect of acetic acid treatment and JFH/non-wood particle ratio to physical and mechanical properties particleboard. Non-wood particles used in this experiment namely ...

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