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Preparation and Characterization of Thermoplastic Starch from Sugar Palm (Arenga pinnata) by Extrusion Method

Journal of Renewable Materials 2023年第4期11卷 1963-1976页

作者： muhammad ghozali Yenny Meliana Widya Fatriasari Petar Antov Mochamad Chalid Departement of Metallurgy and Material Universitas IndonesiaDepok16424Indonesia Research Center for Chemistry National Research and Innovation Agency(BRIN)Kawasan PUSPIPTEK SerpongTangerang Selatan15314Indonesia Research Center for Biomass and Bioproducts National Research and Innovation Agency(BRIN)Jl Raya Bogor KM 46 CibinongBogor16911Indonesia Faculty of Forest Industry University of ForestrySofia1797Bulgaria

Sugar palm(Arenga pinnata)starch is considered an important renewable,biodegradable,and eco-friendly polymer,which is derived from agricultural by-products and residues,with great potential for the development of biocomposite *** research was aimed at investigating the development of TPS biocomposites from *** palm starch using an extrusion *** starch,glycerol,and stearic acid were extruded in a twin-screw *** electron microscopy(SEM)analysis of TPS showed that the starch granules were damaged and gelatinized in the extrusion *** density of TPS was 1.3695 g/mL,lower than that of palm starch,and the addition of stearic acid resulted in increased TPS density.X-ray diffraction(XRD)results showed that palm starch had a C-type pattern crystalline *** tensile strength,elongation at break,and modulus of elasticity of TPS were 7.19 MPa,33.95%,and 0.56 GPa,*** addition of stearic acid reduced the tensile strength,elongation at break and modulus of elasticity of *** rheological properties,i.e.,melt flow rate(MFR)and viscosity of TPS,were 7.13 g/10 min and 2482.19 Pa.s,*** presence of stearic acid in TPS resulted in increased MFR and decreased viscosity *** peak gelatinization temperature of *** palm starch was 70°C,while Tg of TPS was 65°*** addition of stearic acid reduced the Tg of *** thermogravimetric analysis(TGA)analysis showed that the addition of glycerol and stearic acid decreased the thermal stability,but extended the temperature range of thermal *** derived from *** palm starch by extrusion method has the potential to be applied in industrial practice as a promising raw material for manufacturing bio-based packaging as a sustainable and green alternative to petroleum-based plastics.

关键词： Arenga pinnata sugar palm starch thermoplastic starch glycerol stearic acid twin-screw extruder biocomposites

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Development and Characterization of Eco-Friendly Non-Isocyanate Urethane Monomer from Jatropha curcas Oil for Wood Composite Applications

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Journal of Renewable Materials 2023年第1期11卷 41-59页

作者： Samsul Bhakri muhammad ghozali Edy Cahyono Evi Triwulandari Witta Kartika Restu Nissa Nurfajrin Solihat Apri Heri Iswanto Petar Antov Viktor Savov Lee Seng Hua ErikaAyu Agustiany Lubos Kristak Widya Fatriasari Department of Chemistry Universitas Negeri SemarangSemarang50229Indonesia Research Center for Chemistry National Research and Innovation Agency(BRIN)Serpong15314Indonesia Research Center for Biomass and Bioproducts National Research and Innovation Agency(BRIN)Cibinong16911Indonesia Department of Forest Product Faculty of ForestryUniversitas Sumatera UtaraMedan20155Indonesia JATI-Sumatran Forestry Analysis Study Center Medan20155Indonesia Faculty of Forest Industry University of ForestrySofia1797Bulgaria Laboratory of Biopolymer and Derivatives Institute of Tropical Forestry and Forest ProductUniversiti Putra MalaysiaSelangor43400Malaysia Department of Forest Products Faculty of Forestry and EnvironmentIPB UniversityBogor16680Indonesia Faculty of Wood Sciences and Technology Technical University in ZvolenZvolen96001Slovakia

The aim of this research work was to evaluate the potential of using renewable natural feedstock,i.e.,Jatropha curcas oil(JCO)for the synthesis of non-isocyanate polyurethane(NIPU)resin for wood composite *** polyurethane(PU)is synthesized through a polycondensation reaction between isocyanate and ***,utilizing toxic and unsustainable isocyanates for obtaining PU could contribute to negative impacts on the environment and human ***,the development of PU from eco-friendly and sustainable resources without the isocyanate route is *** this work,tetra-n-butyl ammonium bromide was used as the activator to open the epoxy ring with 3-Aminopropyltriethoxisylane as a catalyst to yield urethane of JCO(UJCO).The UJCO were characterized by Fourier Transform Infra-Red spectroscopy(FTIR)and their oxirane,and hydroxyl values were *** result showed that a decrease in oxirane value was found while the hydroxyl value was increased during the time,confirming that the urethane group was *** presence of functional groups in FTIR spectra at wave numbers 1732.08,1562.34,and 3348.42 cm^(−1) indicates the functional groups of C=O(urethane carbonyl),–NH,and–OH,respectively confirmed this *** potential applications of NIPU in the wood composite were also outlined.

关键词： Jatropha curcas oil urethane groups non-isocyanate polyurethane epoxidized JCO cyclic carbonate oxirane value wood composites

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Effect of short-term gavage of ethanolic extract of cogon grass (Imperata cylindrica L) root on the ovarian activity and estrus behavior of female mice

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Asian pacific Journal of Reproduction 2020年第2期9卷 70-76页

作者： Rini Widyastuti Arief Boediono Mas Rizky Anggun Adipurna Syamsunarno Mohammad ghozali Mulyanusa Amarullah Ritonga Alkaustariyah Lubis Sondi Robianto Jaqueline Sudiman Laboratory of Animal Reproduction and Artificial Insemination Department of Animal ProductionFaculty of Animal HusbandryUniversitas PadjadjaranJl.Raya Bandung-Sumedang KM.21West Java 45363Indonesia Central Laboratory Universitas PadjadjaranJl.Raya Bandung Sumedang Km.21 Jatinangor SumedangWest Java 45363Indonesia Laboratory of Embryology Department of AnatomyPhysiologyand PharmacologyFaculty of Veterinary MedicineIPB UniversityJl.Agatis Dramaga Bogor 16680West JavaIndonesia Department of Biomedical Science Faculty of Medicine Universitas PadjadjaranJl.Raya Bandung Sumedang Km.21 Jatinangor SumedangWest Java 45363Indonesia Department of Obstetrics and Gynaecology Faculty of MedicineUniversitas PadjadjaranHasan Sadikin HospitalJl.Pasteur No.38 BandungWest Jawa Barat 40161Indonesia Study Program of Undergraduate Medicine Faculty of MedicineUniversitas PadjadjaranJl.Raya Bandung Sumedang Km.21 Jatinangor SumedangWest Java 45363Indonesia Department of Obstetrics and Gynaecology Faculty of MedicineUdayana UniversityJl.PB SudirmanDenpasarBaliIndonesia

Objective:To assess the effect of short-term gavage of ethanolic extract of Imperata cylindrica L root on the ovarian activity and estrus behavior of female ***:Eighteen virgin female ddY mice,8 to 10 weeks of age,weighing 22-25 g with regular estrus cycle,were divided into three *** 1 received 0.5%carboxymethylcellulose,whereas Groups 2 and 3 received the ethanolic extract of Imperata cylindrica L root at 90 and 115 mg/kg body weight(b.w.)per day by gavage for 20 days,*** of the groups were checked before 9 *** for vaginal cytology to determine the estrus *** day 21,the mice were sacrificed to collect serum samples to quantify the concentrations of reproductive hormones using enzyme-linked immunosorbent assay and to determine changes in the reproductive organs based on their reproductive organ weight,histomorphology,and histomorphometry of ovarium and ***:The reproductive organ weight in the treatment groups was similar compared with that in the control *** 90 mg/kg *** group showed an increase in corpus luteum number when compared with the control group,with few degenerated follicles and diminished ***,the 115 mg/kg *** group showed fewer primordial and primary follicles and an increase in corpus luteum number and a prolonged diestrus phase compared to the control and 90 mg/kg *** *** histomorphology examination of the uterus showed that the thickness of myometrium and epithelium in the treated animals was similar to the control *** addition,there was a significant decrease in follicle-stimulating hormone level in the 115 mg/kg *** group(P<0.05).Conclusions:Short-term gavage of ethanolic extract of Imperata cylindrica L root reduces the follicle-stimulating hormone serum level and folliculogenesis.

关键词： Imperata cylindrica L Estrus cycle Ovary Endometrium Reproductive hormone

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基底细胞癌合并恶性雀斑样黑色素瘤:碰撞瘤1例

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世界核心医学期刊文摘（皮肤病学分册） 2005年第12期1卷 27-27页

作者： Belisle A. Gautier M.- S. ghozali F. J. Wechsler 李政霄 Dr. Departement de Pathologie Hopital Henri Mondor 51 avenue de Lattre de Tassigny F- 94010 Creteil France

Basal cell carcinomas (BCC) are known to co- exist with other cutaneous lesions, but the collision of BCC with malignant melanoma is rare. We report on the case of an 82- year- old woman with a translucent papule set on a beige- brown plaque on the right side of the nose. Histologic examination showed lesions of lentigo maligna melanoma (LMM) in situ and invasive melanoma involving nests of BCC that invaded the dermis. Immunohistochemical studieswith S100 protein,HMB- 45, and Melan- A antibodies showed the melanocytic component in the epidermis and dense clusters of “ atypical” melanocytes in the dermal nests of BCC. On examination of the biopsy specimen, melanoma was still in situ because it was limited to the nests of BCC and not detectable between dermal collagen bundles. However, the re- excision of the lesion showed residual BCC and invasive LMM, level II, measuring 0.2 mm in thickness. The diagnosis, pathogenesis, and prognosis of this collision tumor are discussed.

关键词：恶性雀斑基底细胞癌黑色素瘤癌巢真皮胶原原位癌活检标本组织病理学侵袭性抗体免疫组化

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