Judul: Anatomical Properties and Demarcation Point of Bambang Lanang Wood Juveniles Area Due to Differences in Planting Distances
Abstrak: Bambang lanang telah dibudidayakan secara luas di Provinsi Sumatera Selatan sebagai kayu pertukangan. Penelitian ini bertujuan untuk menganalisis karakteristik anatomi dan batas pembentukan juvenil kayu bambang lanang yang ditanam pada jarak tanam yang berbeda. Bahan yang digunakan berupa tiga buah lempeng kayu setebal 2 cm dari pohon bambang lanang yang berasal dari Kawasan Hutan Dengan Tujuan Khusus di Sumatera Selatan. Pohon tersebut ditanam dengan jarak tanam 3 m x 3 m, 4 m x 2,5 m, dan 6 m x 3 m berumur 12 tahun. Karakteristik anatomi dianalisis secara makroskopis dan mikroskopis, sedangkan batas juvenil kayu ditentukan berdasarkan variasi radial dari tiga parameter, yaitu sudut mikrofibril, panjang serat, dan kerapatan. Hasil penelitian menunjukan bahwa perbedaan jarak tanam tidak berpengaruh terhadap karakteristik anatomi kayu bambang lanang. Secara umum ciri makroskopis kayu bambang lanang adalah kayu berwarna coklat kekuningan, tekstur kayu agak halus hingga halus, arah serat terpadu, permukaan kayu agak mengkilap, dan kesan raba agak kasar, sedangkan ciri mikroskopisnya adalah pori-pori tata baur, ada yang soliter, dan juga berganda 2-3 sel, serta tidak ditemukan tilosis. Sementara itu, perbedaan jarak tanam juga tidak memengaruhi batas area kayu juvenil, yaitu belum dapat diketahui batas juvenilnya., Bambang lanang wood has been widely cultivated in South Sumatra Province as carpentry wood. This study analyze the anatomical and boundary characteristics of bambang lanang wood juveniles planted at different planting distances. The materials used were three wooden disk from the bambang lanang trees from the Forest for Specific Purpose in South Sumatra with a thickness of 2 cm. The trees were planted at with spacing of 3 m x 3 m, 4 m x 2,5 m, and 6 m x 3 m 12 years old. Anatomical characteristics were analyzed for macroscopic and microscopic, at the same time the determination of wood juvenile boundary based on the radial variation of three parameters microfibril angle, fiber length, and wood density. The result showed that the difference in planting distances did not affect the anatomical characteristics of bambang lanang wood. In general, the macroscopic characteristic of bambang lanang wood are yellowish brown, wood texture is rather smooth to smooth, intergrated fiber direction, the wood surface is rather shiny, and the tactile sensation is rather rough, while the microscopic characteristics are mixed pores, some are solitary, and multiple radial with 2-3 cells and no tylosis is found. Meanwhile, difference in planting distances also did not affect the boundaries of juvenile wood areas, that is, the boundaries of juvenile could not be determined.
Keyword: fiber lenght, Magnolia champaca, microfibril angle, wood density

Judul: Penentuan Masa Transisi Kayu Juvenil ke Kayu Dewasa pada Bagian Tengah Batang Sengon (Falcataria moluccana (Miq.) B. Grimes) dan Jabon (Anthocephalus cadamba Miq.)
Abstrak: Sc. Wood is an important forest resources which has been processed in large quantities to meet growing human needs. To meet the increasing demand for wood, wood supplies are able to be taken from fast-growing species planted in plantations and community forests. These fast growing species tend to be harvested in short rotation and have a high proportion of juvenile wood. The objective of this research is to determine the characteristics of juvenile wood in order to use wood Jabon and Sengon properly. The approach of segmented regression model is used to describe the development of juvenile wood to mature wood while non-linear procedures at the level of two orthogonal polynomial equation is used to identify the starting point of the formation of mature wood. To determine the transition of juvenile to mature wood in Sengon and Jabon, samples of two trees with ages 5, 6 and 7 years are taken from the community forest in Sukabumi. Disk with a thickness of 5 cm is taken at a height of 3.5 meters from each sample tree for measuring fiber length, MFA, density and moisture content. Wood moisture content from pith to bark is measure by using gravimetric method. Fiber length and MFA are measured on each circle grows as wide as 1 cm from pith to bark by using maceration and microtome technique. That was an analysis of segmented regression model in radial to fibers and MFA, showing that Sengon and Jabon wood were young wood until the age of 7 years. Fiber length and MFA were the best indicator to determine the transition from juvenile to mature wood, although the transition point varied to their properties. The proportion of juvenile wood on Sengon and Jabon wood at the age of 7 years were respectively 80-100% and 100%.
Keyword: juvenile wood, Microfibril angle

Judul: Integration of Islamic Stock Markets of OIC Countries Before and During the Russia-Ukraine War Crisis
Abstrak: Pasar saham yang terintegrasi memberikan dampak negatif seperti percepatan co-movement (pergerakan bersama) yang rentan terhadap guncangan ekonomi, maupun krisis pasar global ke pasar domestik. Salah satu krisis yang terjadi pada tahun 2022 adalah perang Rusia-Ukraina yang berdampak pada pasar saham, termasuk pada saham syariah yang dipercaya lebih tahan terhadap guncangan krisis global. Penelitian ini bertujuan untuk meneliti perkembangan, integrasi dan respon lima pasar saham syariah negara OKI pada perang Rusia-Ukraina. Metode yang digunakan adalah VAR/VECM pada indeks DJIMMT25, SPSADS, SPSUAEDS, JII, DJIMT, SPBMIR, dan SPBMIU. Hasil penelitian menunjukkan pergerakan yang sama pada pasar saham UAE dan Arab Saudi, sedangkan Turki mengalami tren positif selama perang. Pasar saham syariah negara OKI selama periode perang Rusia-Ukraina terkointegrasi, sementara pasar saham Malaysia memengaruhi pasar saham syariah empat negara OKI lainnya. Hasil IRF menunjukkan terdapat efek permanen pada volatilitas pasar saham syariah negara OKI akibat guncangan yang diberikan. Namun, respon volatilitas relatif kecil karena kontribusi guncangan lebih didominasi oleh pasar saham itu sendiri, An integrated stock market has negative impacts, such as accelerating co-movement, which is vulnerable to economic shocks and global market crises on the domestic market. One of the crises in 2022 was the Russia-Ukraine war which impacted the stock market, including Sharia stocks which were believed to be more resistant to the shocks of the global crisis. This study examines the development, integration, and response of OIC countries five Islamic stock markets in the Russia-Ukraine war. The method used is VAR/VECM on the DJIMMT25, SPSADS, SPSUUAEDS, JII, DJIMT, SPBMIR, and SPBMIU indices. The results show the same movement in the UAE and Saudi Arabia stock markets, while Turkey experienced a positive trend during the war. The Islamic stock market of the OIC countries during the Russia-Ukraine war was cointegrated. In contrast, the Malaysian stock market influenced the Islamic stock markets of the other four OIC countries. The IRF results show a permanent effect on the volatility of the Islamic stock market in OKI countries due to the shocks given. However, the volatility response is relatively small because the stock market itself dominates the contribution of shocks.
Keyword: co-movement, OIC, Rusia-Ukraine war, sharia stock market integration