Interlayered Thin Film Composite (iTFC) Membranes: The Synthesis and Assembly of Active Layer from Conjugated Microporous Polymer

The pursuit of advanced materials with well-defined structures at sub-1 nm size, multi-functionalities, and superior chemical stability is essential for enhanced separation performance but technically challenging. Limitations of conventional TFC membranes for use in Organic Solvent Nanofiltration (OSN) can be addressed by manipulating the pore size and chemical properties of the film with novel materials. Conjugated microporous polymers (CMPs) are promising in a few years because of their highly ordered structure and excellent stability. Porphyrin, one of the basic building blocks, can form a conjugated polymer. Herein, poly(5,10,15,20-tetrakis(4-aminophenyl)porphyrin) or PTAPP, is considerably selected as an active layer from CMPs using an electrochemical approach with various processing parameters such as scan rate, monomer concentration, and cycle number. The assembly of electropolymerized PTAPP membranes with or without an interlayer was studied. The highest separation performance of PTAPP/Nylon membrane using the dense bottom film as the upper layer of the membrane, accounting for 59% of RB-5 dye rejection in methanol and 7.82 L.m-2.h-1.bar-1 methanol permeance. In addition, PTAPP/PE exhibited molecular-sieving selectivity against the mixture of CR and MB dyes and the mixture of CR and MO dyes, with rejection values of 94.48% and 96.16%, respectively. In addition, due to its rigid framework structure of the bottom film, PTAPP/Nylon membrane performed higher NaCl rejection (89%) than the control membrane (53%). Based on SEM characterization, the morphology of poly-TAPP film using MXene as an interlayer revealed the highly porous PTAPP film. However, the pore uniformity, structure, and thickness vary, not strongly correlated with the scan rates. Advisor: Siamak Nejat

The Influence of Surface Types Towards Run-Off Water in Urban Park

Pavements in Alun Kapuas Park constribute 63 of run off water over the capacity of the soil to infiltrate. This water will potentially causes the flooding and puddling issues

Pengaruh Model Pembelajaran Kooperatif Tipe Change of Pairs dan Tipe Student Team Achevement Division (STAD) Terhadap Kemampuan Pemecahan Masalah Matematis Siswa

Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran kooperatif tipe Change of Pairs dan tipe Student Team Achievement Divison (STAD) terhadap kemampuan pemecahan masalah matematis siswa. Penelitian ini dilakukan di SMP Negeri 14 Medan dengan sampel yang terdiri dari 2 kelas yaitu kelas VII A (kelas yang menggunakan model pembelajaran kooperatif tipe Change of Pairs) sebanyak 30 orang dan kelas VII B (kelas yang menggunakan model pembelajaran kooperatif tipe STAD) sebanyak 30 orang. Metode yang digunakan dalam penelitian ini adalah penelitian eksperimen semu (Quasi Eksperimen). Teknik pengambilan sampel dengan cara cluster random sampling. Instrument yang digunakan untuk mengumpulkan data berupa lembar tes. Analisis data yang digunakan adalah uji paired sample t test dan uji independent t test. Hasil penelitian mengungkapkan bahwa (1) Terdapat pengaruh model pembelajaran kooperatif tipe Change of Pairs terhadap kemampuan pemecahan masalah matematis siswa dengan dan nilai rata- rata (2) Terdapat pengaruh model pembelajaran kooperatif tipe Student Team Achievement Division (STAD) terhadap kemampuan pemecahan masalah matematis siswa dengan dan nilai rata-rata Terdapat perbedaan kemampuan pemecahan masalah matematis siswa yang diajarkan dengan model pembelajaran kooperatif tipe Change of Pairs dan tipe STAD dimana . Jika dilihat dari nilai rata-rata post test pada kedua kelompok kelas tersebut maka nilai rata-rata kelas eksperimen I yang diberikan perlakuan dengan model pembelajaran kooperatif tipe Change of Pairs lebih baik daripada kelas eksperimen II yang diberikan perlakuan dengan model pembelajaran kooperatif tipe STAD

1. Program Kreativitas Mahasiswa Mangifera Antibacterial Hand Wash

In every activity, the body involves the upper limbs, namely: hand. The hand is an organ that functions in channeling the entry and spread of microorganisms into the body. Contaminated hands can cause a person to be infected with nosocomial diseases. skin infection in society in Indonesia is still high. This is due to lack of public attention to the cleanliness of the skin, especially the skin of the fingers. For keep hands clean, wash hands using running water yet enough to kill germs so it is necessary to wash hands with soap. Hand washing soap that is widely circulated in the market has been mixed with chemical material. The presence of chemicals in hand soap can cause skin problems. However, with the use of mangifera antibacterial hand This wash can be a solution to kill germs on your hands. This soap made from natural ingredients so it is safe to use for children, teenagers, adults and parents, besides that it also has an affordable price. For that we process mango arumanis leaves as laundry soap hand. The natural chemical content of mango arumanis leaves are triterpenoids and flavonoids as antioxidants, antibacterial, antiviral, anti-inflammatory, anti-allergic and anti cancer. The advantages of the "Mangifera Antibacterial Hand Wash" product are: 1) Contains mango arumanis leaf extract which can kill germs and bacteria bacteria, 2) Contains a relaxing mango aroma, 3) Safe used for all circles, 4) The materials used are easy to obtain, 5) Keeping hands skin moist, and 6) Economical price. Marketing of this product packed in bottles with sizes of 240 mL and 140 mL Reasons for choosing packaging in the form of bottles because it is easy to store, practical, and not easy to spill. Products are marketed and promoted directly to: 1) students, 2) lecturers, 3) teachers, 4) the community around Solo and through: 1) WhatsApp, 2) Instagram, and 3) Shopee. Orders can contact the number and more info can be seen via instagram @mangifera.idn and on shopee platform, namely Aerision.id

EVALUASI FUNGSI EKOLOGIS RUANG TERBUKA HIJAU (RTH) PERKOTAAN SEBAGAI AREAL RESAPAN DI KOTA PONTIANAK (STUDI KASUS: TAMAN ALUN KAPUAS)

   ABSTRACTAlun Kapuas Park is a city park that designated by The Park Departement as Green Open Space (RTH) in Pontianak city. In connection with the function of RTH as rainwater catchment, Alun Kapuas Park still got less attention because puddle often happens during the rainy season.  This research aims to determine 1) infiltration rate when the condition is not raining  and the day condition is raining, 2) the influence of soil physical characteristic and vegetation against the infiltration rate, 3) the potential of Alun Kapuas Park to absorb rainwater. Infiltration rate measurement method uses double ring infiltrometer, then it is analyzed by the method of Horton. The result of research indicate that the condition of dry day has average infiltration rate value of 5,62 cm/h greater than the condition of rainy days has average infiltration rate value of 3,20 cm/h. The highest infiltration rate value of  14,40 cm/h is point 4 with sand soil value of 64,64%, permeability value of 26,29 cm/h, and porosity value of 55,42%. Lowest infiltration rate value of 2,02 cm/h is point 3, with  sand soil value of 54,41%, permeability value of 5,14 cm/h, and porosity value of 47,33%. The greater values of permeability, porosity, and the sand fraction can increase the infiltration rate. Vegetation at Point 1, Point 2 and Point 4 is dominated by trees and grass have infiltration rate greater than 3 points dominated the ground cover plants and shrubs.  Potential seepage of rain for one year in Alun Kapuas  Park is 37% of the total volume of rainfall amounted to 54.801 m3, so it does not fulfill the ecological functions of city park as rainwater catchment have percentage of 75-95%. Something that can be suggested is  expanding the area of reforestation, choosing the composition of the vegetation right, replacing asphalt with paving blocks, and social-economic activities are not carried out in the area of reforestation.Key word: city park , infiltration rate, soil physical characteristic, vegetation